The present application relates to the technical field of projection, and provides a projection calibration method and apparatus, an electronic device and a storage medium. The method comprises: establishing a first screen coordinate system and a second screen coordinate system; obtaining an included angle between the transverse axis of the first screen coordinate system and the transverse axis of the second screen coordinate system as a transverse axis included angle; obtaining actual coordinate information and/or actual angle information of a projection device in the first screen coordinate system on the basis of the transverse axis included angle; obtaining standard coordinate information and/or standard angle information of the projection device in the first screen coordinate system; determining a projection adjustment parameter according to actual position information and standard position information; and adjusting at least one of the projection position and the projection direction of the projection device according to the projection adjustment parameter. Therefore, a picture projected by the projection device can be completely displayed on a screen without distortion, the time consumption of user adjustment is reduced, and the user experience is improved.
A focusing method for a projection device (120) and a projection device (120). The focusing method comprises: projecting a first illumination light beam and a second illumination light beam to a lens (123), said two beams being emitted from the same position of a spatial light modulator (222) and having different incident angles, the first illumination light beam being projected onto a projection surface (110) after passing through the lens (123) so as to form a first light spot (226), and the second illumination light beam being projected onto the projection surface (110) after passing through the lens (123) so as to form a second light spot (227); on the basis of a relative position relationship between the first light spot (226) and the second light spot (227) on the projection surface (110), calculating the amount of focus of the lens (123); and focusing the lens (123) on the basis of the amount of focus. In this way, the focusing efficiency of the projection device (120) can be improved.
Embodiments of the present application disclose a heat load balancing method and apparatus for local dimming, and a projection device. The method comprises: obtaining a first display image displayed by a first spatial light modulator on the basis of a preset image in the local dimming of the projection device; obtaining, according to the first display image, a first heat load of the first spatial light modulator; if the first heat load is higher than the first heat resistance of the first spatial light modulator, adjusting the output power of the first spatial light modulator; obtaining, according to the adjusted output power of the first spatial light modulator, a first target image to be displayed on the first spatial light modulator after the output power is adjusted; and obtaining, according to the preset image and the first target image, a second target image to be displayed on a second spatial light modulator. The method provided by the present application can effectively balance the heat load on the spatial light modulator during the local dimming of the projection device.
Provided in the present application is a projection apparatus modulation method. A projection apparatus comprises a light source, a first modulation module and a second modulation module, wherein the first modulation module comprises a plurality of first optical switches. The method comprises: controlling a light source to emit illumination light; controlling a plurality of first optical switches to modulate the illumination light to form a continuous light field, and displaying a plurality of different halftone patterns in a switching manner within one image frame period of a second modulation module, wherein the plurality of different halftone patterns all represent the same grayscale; and controlling the second modulation module to modulate the continuous light field to generate an image light field. By means of the projection apparatus modulation method provided in the embodiments of the present application, the requirement of a first modulation module for temperature control is reduced, and the service life of the first modulation module is prolonged. Further provided in the present application are a projection apparatus, a controller and a computer-readable storage medium.
The present application discloses a projection image superposition method and apparatus, an electronic device and a storage medium, and relates to the technical field of projection. The method comprises: using one projection device of at least two projection devices as a reference projection device, and a projection device other than the reference projection device as a superposition projection device; using a source image of the reference projection device as a reference source image, acquiring coordinates of the reference source image as first coordinates; calculating coordinates of a projection source image as second coordinates according to the first coordinates and a first conversion relationship, the first conversion relationship being a conversion relationship between the reference source image and the projection source image, and the projection source image being a source image of a superposition projection device; and controlling the superposition projection device to adjust the projection source image according to the second coordinates so that a projection picture projected by the superposition projection device on the basis of the adjusted projection source image is superposed with a reference picture projected by the reference projection device on the basis of the reference source image, thereby avoiding distortion of a displayed picture.
Disclosed in the present application are an automatic calibration method, and a device, a system and a computer-readable storage medium, wherein the method is applied to a calibration control device. The method comprises: sending a first control instruction to a projection device, such that the projection device projects a plurality of projection pictures; sending a second control instruction to a photographic device, such that the photographic device photographs the projection pictures, so as to obtain a plurality of photographed projection images; and processing the plurality of photographed projection images, so as to obtain calibration parameters of the photographic device, wherein the calibration parameters comprise an internal parameter and a distortion parameter of the photographic device. In this way, the present application makes it possible to automatically calibrate a photographic device, thereby improving the efficiency of calibration.
A projection apparatus and an illumination light detection, auxiliary focusing and ambient light detection method, relating to the technical field of projection devices. The multiplexing lens projection apparatus comprises a lens module (110), a silicon-based liquid crystal element (120), a polarization light-splitting element (130), and an image sensor (140). The silicon-based liquid crystal element (120) is disposed behind the lens module (110), the polarization light-splitting element (130) is located between the lens module (110) and the silicon-based liquid crystal element (120), and the silicon-based liquid crystal element (120) is located at a first rear focus position (112) of the lens module (110). The image sensor (140) is located at a second rear focus position (114) of the lens module (110) under the action of the polarization light-splitting element (130), and is used for assisting in adjusting the distribution of illumination light incident on the silicon-based liquid crystal element (120). The present application facilitates improving the projection image performance of a projection system, and can also be applied to illumination light detection, auxiliary focusing and ambient light detection, thereby improving good use experience of a user.
A method, apparatus and system for calibrating two spatial light modulation devices, and an electronic device. The method comprises: acquiring a pixel distribution of a second spatial light modulator (S210); turning on pixels in a first spatial light modulator according to a predetermined rule, such that the second spatial light modulator outputs first image light according to output light of the turned-on pixels in the first spatial light modulator (S220); acquiring a first image to be processed that includes a first imaged image, wherein the first imaged image is obtained by means of imaging by the first image light (S230); according to a pre-processed first image to be processed, determining position information of the first imaged image (S240); and according to the pixel distribution of the second spatial light modulator and the position information of the first imaged image, determining and storing a correspondence between each pixel in the first spatial light modulator and each pixel in the second spatial light modulator (S250). Therefore, the calibration efficiency of two spatial light modulation devices can be improved, thereby ensuring the accuracy of a calibration result.
The present application relates to the technical field of display, and discloses an image display method and apparatus, an electronic device, and a storage medium. The image display method comprises: obtaining a trained lens model, and loading a phase of a target image onto the trained lens model, wherein the trained lens model is a linearized model; when a first light wave is inputted into the trained lens model, obtaining a second light wave outputted after the trained lens model performs phase modulation, wherein the second light wave carries phase information of the target image; and inputting the second light wave into an intensity spatial light modulator to obtain a second light wave outputted after the intensity spatial light modulator performs intensity modulation, such that the second light wave after the intensity modulation carries the phase information and intensity information of the target image, and the second light wave after the intensity modulation displays the target image on a display plane.
H04N 5/74 - Projection arrangements for image reproduction, e.g. using eidophor
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
A light source system, comprising a light source, a light splitting and combining assembly, a scattering assembly, and a light homogenizing element. The light source comprises a plurality of laser diodes or laser diode arrays for generating laser, the laser comprising at least a first wavelength light and a second wavelength light, and the first wavelength light and the second wavelength light having different colors or different wavelengths. The light splitting and combining assembly is configured to combine the laser to form a combined light beam. The scattering assembly is configured to scatter and homogenize the combined light beam. The scattering assembly comprises a first scattering element and a second scattering element, the first scattering element and the second scattering element being independently arranged. The light homogenizing element is located between the scattering assembly and the light splitting and combining assembly or behind the scattering assembly or between the first scattering element and the second scattering element, and is configured to homogenize the light beam incident to the light homogenizing element. According to the present application, multi-color laser is scattered by the two independently arranged scattering elements, so that the scattering effect is achieved, the volume of the light source system is reduced, and the optical loss is reduced.
The present invention provides a laser light source system and a laser projection apparatus, comprising a first excitation light source, a second light source, a first light homogenizing element, a second light homogenizing element, a wavelength conversion device, and a light splitting and combining device. The light splitting and combining device reflects first blue light to a fluorescent layer which performs wavelength conversion to obtain yellow excited light; the light splitting and combining device transmits the yellow excited light, reflects second blue light, combines the yellow excited light and the second blue light, and outputs combined light. In the present invention, the first blue light emitted by the first excitation light source passes through the wavelength conversion device to generate the yellow excited light, and the yellow excited light and the second blue light emitted by the second light source are combined to form white light to be outputted; the apparatus has the advantages of being simple in overall structure, lower in cost, high in light emitting efficiency and the like.
A method and apparatus for identifying corner points of a pattern in an image, and a medium and an electronic device. The method for identifying corner points of a pattern in an image comprises: performing image recognition on an image containing a pattern to be subjected to recognition, and determining position information of boundary points corresponding to said pattern (S210); according to the position information of the boundary points, determining included angles formed by every three adjacent boundary points (S220); according to the included angles formed by every three adjacent boundary points, identifying, from included angle vertexes of the included angles, near-corner points to be processed (S230); and according to the number of adjacent near-corner points to be processed, identifying a target near-corner point from the near-corner points to be processed, such that corner points of said pattern are determined according to the target near-corner point (S240). By means of the technical solution of the embodiments of the present application, the positions of the corner points of said pattern can be quickly identified, and the accuracy of corner point position identification is ensured.
A light source system and a projection system, the light source system comprising: a first light-emitting assembly (11) and a light-homogenizing system (12). The first light-emitting assembly (11) is used to generate a first light beam. The light-homogenizing system (12) is arranged on an exit light path of the first light-emitting assembly (11), and is used for homogenizing the first light beam, wherein the direction of a fast axis of the first light beam corresponds to a first direction of the light-homogenizing system (12), the direction of a slow axis of the first light beam corresponds to a second direction of the light-homogenizing system (12), the first direction is a direction in which the etendue of the light-homogenizing system (12) is greater than a preset etendue, and the second direction is a direction in which the etendue of the light-homogenizing system (12) is less than or equal to the preset etendue. By means of the foregoing manner, stripes generated by 3D devices may be eliminated.
Embodiments of the present application provide an image quality debugging method, an apparatus, a system and an electronic device. Said method comprises: acquiring a picture to be debugged of a device to be debugged and a reference picture of a reference device; determining, according to the difference between the pixel value of a pixel point in the picture to be debugged and the pixel value of the corresponding pixel point in the reference picture, a pixel point to be debugged in the picture to be debugged; adjusting parameter values of the pixel point to be debugged in positive and negative adjustment directions respectively, and determining, according to the difference between the adjusted pixel value of the pixel point in the picture to be debugged and the pixel value of the corresponding pixel point in the reference picture, a target adjustment direction of the pixel point to be debugged; and adjusting, according to the target adjustment direction, the parameter values of the pixel point to be debugged. According to the technical solution of the embodiments of the present application, the efficiency of debugging the image quality can be improved, and the effect of debugging the image quality is ensured.
An optical engine light source fixing structure (100) comprises a bottom plate (110), a light source module (120), and an optical engine module (130). The light source module (120) and the optical engine module (130) are fixedly connected to the bottom plate (110); the light source module (120) comprises a light source housing (121); and a light exiting side of the light source housing (121) comprises a light exiting surface (123) and first positioning parts (125). The optical engine module (130) is located on the light exiting side of the light source module (120) in an optical axis direction and comprises an optical engine housing (131); a light incident side of the optical engine housing (131) is sealedly connected to the light exiting side of the light source housing (121); the light incident side of the optical engine housing (131) comprises a light incident surface (1310) and second positioning parts (1312); the light incident surface (1310) of the optical engine housing (131) corresponds to the light exiting surface (123) of the light source housing (121), and a deformation gap is formed therebetween; and the second positioning parts (1312) are matched with the first positioning parts (125) to limit the light incident side of the optical engine module (130) to move relative to the light source module (120) in a plane perpendicular to an optical axis. The optical engine light source fixing structure (100) effectively mitigates the problem of projected image defocusing caused by thermal expansion deformation while ensuring stable high-coupling efficiency of a light incident end of a square bar assembly (135). Further provided is a projector (200).
A light modulator (10) and a projection display system. The light modulator (10) comprises a surface-angle conversion assembly (11) and a modulation assembly (12). The surface-angle conversion assembly (11) is used for performing surface-angle conversion and converging on multiple light source beams to form multiple convergent beams corresponding to the light source beams, the multiple convergent beams being separated in an angle space. The modulation assembly (12) is used for modulating the multiple convergent beams to form image light; and the modulation assembly (12) comprises multiple pixel units (121); each pixel unit (121) comprises at least three sub-pixels; and the convergent beams respectively enter sub-pixels of the pixel units, and are in one-to-one correspondence with the sub-pixels. The surface-angle conversion assembly (11) comprises a microlens array consisting of multiple microlenses, each microlens being matched with the position of at least one pixel unit to converge the convergent beams to the pixel units (121). The method above can improve the light efficiency, and the present invention is simple in structure and small in volume.
A light modulator and a projection display system. The light modulator (10) comprises a plane-angle conversion assembly (11) and a modulation assembly (12), the plane-angle conversion assembly (11) performs plane-angle conversion on multiple light beams from a light source, to form multiple convergent light beams, and the multiple convergent light beams being separated in a plane space; the modulation assembly (12) modulates the multiple convergent light beams to form image light; the modulation assembly (12) comprises a plurality of pixel units (121), at least four sub-pixels (121a-121d) in the pixel units (121) comprise supplementary sub-pixels, the multiple light beams from a light source comprise supplementary light beams, the supplementary light beams correspond to the supplementary sub-pixels, and the supplementary light beams are used for supplementing the brightness of the light beams incident to the plane-angle conversion assembly (11) or enlarging the color gamut of the light beams incident to the plane-angle conversion assembly (11); the plane-angle conversion assembly (11) comprises a micro lens array composed of a plurality of micro lenses, and the micro lenses match the positions of the pixel units (121).
A stereoscopic display apparatus (10) and a stereoscopic projection display system. The stereoscopic display apparatus (10) comprises: a surface-angle conversion component (11) and a modulation component (12), wherein the surface-angle conversion component (11) is arranged on light paths of a plurality of light source beams, and is used for performing surface-angle conversion on the plurality of light source beams that are separated in an angle space, so as to form a plurality of converted beams corresponding to the light source beams, the plurality of converted beams being separated in a surface space; the modulation component (12) is arranged on an emergent light path of the surface-angle conversion component (11), and is used for modulating the plurality of converted beams, so as to form image light; and the modulation component (12) comprises a plurality of pixel units (20), each pixel unit (20) comprising a first sub-pixel unit (21) and a second sub-pixel unit (22), and the polarization directions of the first sub-pixel unit (21) and the second sub-pixel unit (22) being perpendicular to each other, such that the first sub-pixel unit (21) and the second sub-pixel unit (22) respectively display two pieces of image information having parallax therebetween. In this way, high-frame-rate stereoscopic display can be realized.
Embodiments of the present application relate to the technical field of projection, and provide a projection correction method, a projection correction apparatus, and an electronic device. The present invention can automatically correct the position of a projection device and mitigate the problem of matching difficulty of a projection image and a projection screen. The method comprises: obtaining screen coordinates of at least three non-collinear feature points in a projection image under a screen coordinate system, the at least three non-collinear feature points constituting one or more feature triangles; determining, according to screen coordinates of the feature points in the one or more feature triangles, the screen coordinate system, and azimuth angles, a projection device coordinate system having a minimum offset error, the projection coordinate system corresponding to an ideal feature triangle among the one or more feature triangles; calculating a translation correction component and a rotation correction component of a light-emitting point under the projection device coordinate system according to the projection device coordinate system and an ideal coordinate of the light-emitting point under the projection device coordinate system; and rotating and/or translating a projection device according to the translation correction component and the rotation correction component.
Disclosed are a projection fusion method, a projection fusion system and a computer-readable storage medium. The projection fusion method is applied to a projection fusion system, the projection fusion system comprises a plurality of projection assemblies, and the projection fusion method comprises: configuring information of a plurality of projection assemblies; controlling each projection assembly to project a test pattern; when each projection assembly projects the test pattern, controlling the plurality of projection assemblies to respectively collect test patterns, so as to obtain a plurality of sampling patterns, and acquiring, by using the test patterns and the sampling patterns, a relative position relationship between the projection assembly that projects the test pattern and the other projection assemblies; and splitting a target projection pattern by using the relative position relationship, and splicing and fusing the target projection pattern by means of the plurality of projection assemblies. In this way, automatic splicing and fusion by a plurality of projection assemblies can be realized, and projection fusion and 3D mapping calibration without human intervention are realized.
Disclosed in the present invention is a projection device adjusting apparatus. The projection device adjusting apparatus comprises a chassis and at least three telescopic mechanisms. Each telescopic mechanism comprises: a driving assembly, configured to provide a driving force; a universal connecting piece, configured to be connected to a projection device; and a scissor frame, comprising a first hinge point, a second hinge point and a third hinge point, wherein the scissor frame is connected to the chassis by means of the first hinge point, connected to the driving assembly by means of the second hinge point, and connected to the universal connecting piece by means of the third hinge point, and the scissor frame is driven by the driving assembly to carry out height-adjusting motion. The at least three telescopic mechanisms are not collinear and are arranged on the chassis, and the telescopic mechanisms can independently carry out height-adjusting motion; the at least three telescopic mechanisms work in conjunction with each other to adjust the height of the projection device in a first direction, an angle around a second direction, and an angle around a third direction. The projection device adjusting apparatus of the present invention can adjust the position of a projection device in multiple directions and in multiple angles and also has the advantage of a large adjustment range.
F16M 11/12 - Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting in more than one direction
An LED light source structure (100) and a projector (200), relating to the technical field of lighting devices. The LED light source structure (100) comprises an LED light source (110), an anti-interference element (120) and a light homogenizing device (130). The LED light source (110) comprises an LED chip (1103), a circuit substrate (1101), and a gold wire (1105) electrically connected to the LED chip (1103) and the circuit substrate (1101). An incident end of the anti-interference element (120) is configured to correspond to a light-emitting surface of the LED chip (1103), and a spacing is provided therebetween. The incident end of the anti-interference element (120) is not coated with the gold wire (1105). The light homogenizing device (130) is connected to an exit end of the anti-interference element (120), and is used to homogenize light, said light being emitted by the LED light source (110) and then exiting by means of the anti-interference element (120) along an optical axis direction. In the LED light source structure (110), the anti-interference element (120) is provided between the incident end of the light homogenizing device (130) and the exit end of the LED light source (110) so as to separate the light homogenizing device (130) from the LED light source (110), and to avoid contact between the light homogenizing device (130) and the gold wire (1105) in the LED light source (110). Thus, the LED light source structure (100) may emit light having high uniformity, maintain etendue, and reduce the burden of subsequent optical systems.
A light source assembly (10). The light source assembly (10) comprises a light source array (100) and a shaping controller (200), wherein the light source array (100) comprises a plurality of light sources (110), the light sources (110) being used for emitting a laser; the shaping controller (200) is arranged on a light path of the laser, and comprises a plurality of shaping control units (210) for shaping the laser emitted by the light source array (100); and the shape of the shaping control units (210) is consistent with the shape of the light source array (100), such that a laser emitted by the light sources (110) at the same position forms a plurality of uniformly distributed first light spots (310) on a first preset plane (300) after the laser is shaped by the shaping control units (210), and the plurality of first light spots (310) form a first illumination region (320) having a uniform brightness. The provided light source assembly (10) can provide an illumination region having a uniform brightness.
An optical engine system (30), comprising a light source, a polarizing light-splitting device (200) and a light combining element (300), wherein the light source comprises a red light-emitting element (110), a green light-emitting element (120) and a blue light-emitting element (130), the red light-emitting element (110) being excited to generate red light, the green light-emitting element (120) being excited to generate green light, and the blue light-emitting element (130) being excited to generate blue light; the polarizing light-splitting device (200) is used for receiving the blue light emitted by the blue light-emitting element (130), and splitting the blue light into first polarized light and second polarized light; and the second polarized light is guided to the red light-emitting element (110) or the green light-emitting element (120), such that same is excited to generate some red light or some green light; and the light combining element (300) is used for combining the red light, the green light and the first polarized light and then emitting same. Blue light is split into different polarization states, such that blue light in some polarization states forms some light of other colors, thereby improving the utilization rate of the blue light, and reducing the optical energy loss. In addition, further provided is a projection device.
An actuator, an actuator control method, a projection device, and a projection device control method, which relate to the technical field of intelligent devices, and can reduce the power consumption of the actuator and increase the Ampere force of the actuator. The actuator (10) comprises an E-type magnetic core (11), a coil (12), a first permanent magnet (13), and a second permanent magnet (14); the E-type magnetic core (11) comprises a first branch arm (111) and a second branch arm (112) which are parallel, and a third branch arm (113) located between the first branch arm (111) and the second branch arm (112); the coil (12) surrounds the third branch arm (113) in a closed shape by taking the third branch arm (113) as a winding center; the first permanent magnet (13) is fixed on the side of the first branch arm (111) close to the coil (12), the second permanent magnet (14) is fixed on the side of the second branch arm (112) close to the coil (12), and the first permanent magnet (13) and the second permanent magnet (14) are not in contact with the coil (12).
H02K 33/18 - Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
A projection display system, a light-emitting assembly (10) in the projection display system being used for producing laser light; a light guide assembly (20) is used for controlling the transmission direction of the laser light and the light reflected on the light guide assembly (20); a wavelength conversion apparatus (30) comprises a first area and a second area, the first area comprising a plurality of modules (31) used for converting a first laser light into excited laser light and transmitting the excited laser light and a second laser light, and the second area being used for reflecting a third laser light; a display apparatus (40) is arranged on the emergent light path of the wavelength conversion apparatus (30), and is used for receiving the excited laser light and the second laser light; the display apparatus (40) comprises a plurality of pixel areas (41) corresponding on a one-to-one basis to the plurality of modules (31); first excited laser light is transmitted to the display apparatus (40), and recovered light is reflected by the light guide assembly (20) to be incident on the wavelength conversion apparatus (30) again. The present projection display system can reduce energy loss and increase the efficiency of energy utilisation.
A rotating polygon mirror (220), a linear array light source scanning display system (200), and a projector. The rotating polygon mirror (220) is applied in the linear array light source scanning display system (200) to receive and reflect a collimated light beam (211) emitted by a linear array light source (210) so as to form a display image; the rotating polygon mirror (220) comprises n reflective surfaces (230), wherein n≥2, and each reflective surface (230) is parallel to an axis of rotation (240); the rotating polygon mirror (220) is rotatable about the axis of rotation (240), so that the n reflective surfaces (230) move sequentially, through the rotation of the rotating polygon mirror (220), to a light path of the collimated light beam (211) in order to successively reflect the collimated light beam (211); the collimated light beam (211), after being reflected by the n reflective surfaces (230), sequentially forms n scanning line arrays (280) on a display surface (251); and on the display surface (251), at least two scanning line arrays (281, 282) of the n scanning line arrays (280) are displaced in a direction parallel to the axis of rotation (240). The rotating polygon mirror (220) may increase the display resolution of a projected picture with a limited number of laser light sources, can improve the display effect, and is easy to process and manufacture.
An optical film (10) and an optical imaging system (100). The optical film (10) is attached to a windshield (20), and at least comprises a phase cancellation layer (13), a reflection layer (12) and a microstructure layer (11) that are stacked in sequence; the reflection layer (12) is used to reflect an image beam to form a first reflected beam; the phase cancellation layer (13) is used to amplify and/or deflect a second reflected beam, so as to guide the second reflected beam to a second exit direction; a normal vector of the microstructure layer (11) faces a first exit direction, and the microstructure layer (11) is used to guide the first reflected beam to the first exit direction; and the phase cancellation layer (13) is used to cancel the phase difference generated by the beam passing through the microstructure layer (11). The second reflected beam is formed by reflecting the image beam by the windshield (20), and the first exit direction is different from the second exit direction. In this way, a virtual image can be directly formed when the optical film (10) is attached to the surface of the windshield (20), and ghost images can further be eliminated.
Disclosed are a height-adjustment device for a projection screen, a projection screen, and a laser television. The height-adjustment device comprises screw rod-sliding block mechanisms, crossbeam support mechanisms, and a crossbeam. Each screw rod-sliding block mechanism comprises a screw rod and a sliding block. One end of each crossbeam support mechanism is hinged or fixedly connected to the corresponding sliding block and forms a first hinge point or a first connection point. The other end of the crossbeam support mechanism is hinged to the crossbeam and forms a second hinge point. The sliding block can move along the length direction of the screw rod, so as to adjust the linear distance between the first hinge point or the first connection point and the crossbeam. There are two screw rod-sliding block mechanisms and two crossbeam support mechanisms, either of which are distributed symmetrically about the perpendicular bisector of the crossbeam. According to the height-adjustment device of the present invention, the height can be adjusted by means of individual or simultaneous action of screw rod-sliding block mechanisms and crossbeam support mechanisms, and the adjustment range is large, so that the requirements of use at different heights for a screen can be satisfied. Different tension requirements can also be satisfied by adjusting the support angle of the height-adjustment device.
A projection screen (100), comprising a screen (110), connecting columns (120), a screen vibration assembly (130), a measurement assembly and a driving motor (150). The connecting columns (120) are fixedly connected to both sides of the screen (110), and the screen vibration assembly (130) are connected to the connecting columns (120). The measurement assembly is connected to the screen (110), the connecting columns (120) or the screen vibration assembly (130) and used for measuring the vibration amplitude of a component connected thereto. The driving motor (150) is connected to the screen vibration assembly (130), and the measurement assembly is electrically connected to the driving motor (150). When the vibration amplitude measured by the measurement assembly is less than or equal to a preset amplitude, the driving motor (150) drives the screen vibration assembly (130) to drive the screen (110) to vibrate in a preset direction. The projection screen (100) uses the screen vibration assembly (130) to drive a screen (110) to vibrate, and by means of a feedback loop of the measurement assembly, the driving motor (150) drives the screen vibration assembly (130) to drive the screen (110) to be always in a vibration state, avoiding a sudden static state of the screen (110) in a vibration process, and ensuring that the screen (110) achieves a continuous speckle elimination effect.
A light source device (1) and a laser projection system (60). The light source device (1) comprises: a first light source (10) for emitting excitation light; a first polarization controller (11) for controlling a polarization state of the excitation light to emit excitation light of a first polarization state or a second polarization state; a first homogenizing apparatus (12) for performing homogenizing processing on the excitation light of the first polarization state or the second polarization state; a first light splitting/combining member (40) for reflecting the excitation light of the first polarization state or transmitting the excitation light of the second polarization state; a first wavelength conversion device (21) for receiving the excitation light of the first polarization state and emitting first light; and a second wavelength conversion device (31) for receiving the excitation light of the second polarization state and emitting second light, wherein the first light splitting/combining member (40) reflects the second light or transmits the first light. The first wavelength conversion device (21) and the second wavelength conversion device (31) are excited by means of the single first polarization controller (11), so that the working efficiency can be improved and the costs can be lowered, and moreover, the brightness of the first light or the second light is effectively improved.
An autofocus method and an autofocus apparatus. The autofocus apparatus comprises a lens (11), a lens barrel (12), a controller (13) and a drive device (14). A resistor bar (121) is provided on the lens barrel (12). The lens (11) is provided with a contact (111) in contact with the resistor bar (121). At least one end of the resistor bar (121) is connected to the controller (13). The contact (111) is connected to the controller (13). The controller (13) is used to detect a contact voltage at the contact (111), to obtain a current angle of the lens barrel (12) according to the contact voltage, and to obtain an angle difference by which the lens barrel (12) needs to rotate according to an imaging angle acquired in advance and the current angle. The drive device (14) is connected to the controller (13), and is used to drive the lens barrel (12) to rotate so as to reduce the angle difference. The contact voltage detected by the controller (13) changes with rotation of the lens barrel (12). The autofocus apparatus can realize automatic focusing, and reduce costs.
G02B 7/09 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
Disclosed are a real-time focusing method, apparatus and system, and a computer-readable storage medium. The method comprises: acquiring video source data and a captured image; processing the video source data and the captured image, so as to obtain feature information of the video source data and feature information of the captured image; and on the basis of the feature information of the video source data and the feature information of the captured image, generating a control instruction, and sending the control instruction to an electric motor, such that the electric motor drives a projection lens to move, thereby realizing focusing. In this way, automatic real-time focusing can be realized by means of the present application.
Embodiments of the present application provide a curtain fixing structure, a mounting support, a curtain device and a projection display system, which relate to the technical field of display. The curtain fixing structure comprises a frame, a fixing member and an adjusting assembly. The frame comprises an adjusting portion, and a supporting side and a mounting side that are arranged opposite each other, the mounting side being provided with a clamping portion. The fixing member is used for being fixedly connected to an edge of a curtain and is detachably connected to the clamping portion. The adjusting assembly is arranged between the curtain and the frame, is elastically connected to the frame and has a fixed state and an abutting state; the adjusting assembly, when in the fixed state, is fixedly connected relative to the frame; and the adjusting assembly, when in the abutting state, abuts against the curtain connected to the fixing member so as to provide tension for the curtain to be unfolded on the supporting side of the frame. The curtain mounting support comprises a plurality of curtain fixing structures, and all the frames are sequentially connected end-to-end and a hollow framework structure is formed by being enclosed by same. The curtain device comprises the curtain and the curtain mounting support. The present application is convenient to mount, reducing the mounting difficulty and facilitating the improvement of the mounting efficiency.
Disclosed in embodiments of the present invention is a projection device, comprising a light source apparatus, a spatial light modulator, and a control apparatus. The light source apparatus comprises at least one laser unit; the control apparatus is used for obtaining brightness distribution information of the current image frame according to an image signal to be displayed, and controlling a drive current of the laser unit according to the brightness distribution information of the current image frame and service life data information of the laser unit, so that the drive current is greater than a rated drive current during at least a portion of the time period within the time of the current image frame; and the spatial light modulator is disposed on an optical path of light emitted by the light source apparatus and used for modulating the light emitted by the light source apparatus to obtain a modulated image. The projection device can fully utilize the relationship between the service life of the laser unit and the drive current, and can ensure that the light source apparatus achieves high-brightness display under the condition of meeting service life requirements.
A single-plate liquid crystal projection device, comprising a white light source module (10) for emitting a first light beam at least comprising red light, green light and blue light components; a first wavelength angle beam splitter (20), the first light beam being converted into color light beams by means of the first wavelength angle light splitter (20); a first micro lens array (30) for converging the color light beams so that the color light beams form separated red, green and blue color stripes or color spots on a reference plane; a liquid crystal display device (40) comprising a liquid crystal pixel array containing a plurality of liquid crystal pixels, wherein the liquid crystal pixel array is arranged on the reference plane, and the color stripes or color spots of different colors respectively fall on different liquid crystal pixels, and the liquid crystal display device (40) is used for modulating the incident light to form a color image and emit same; and a projection lens (50) for projecting the color image emitted by the liquid crystal display device (40) to a preset position, wherein when the cross-sectional area of the first light beam is equivalent to the effective pixel area of the liquid crystal display device (40), the first light beam is light with a small divergence angle.
Disclosed are a method, device, and system for recognizing a projection position, and a storage medium. The method comprises: acquiring an image to be processed, said image comprising a screen area and a projection area; selecting a point from the projection area as the starting point of a ray; searching along a plurality of preset directions on the basis of the starting point of the ray to obtain a boundary point of the screen area and a boundary point of the projection area, a first preset angle being formed between two adjacent preset directions; screening the boundary points to obtain near corner points; and using the near corner points to obtain a corner point of the screen area and a corner point of the projection area, using the coordinate of the corner point of the screen area as the position where a screen is projected, and using the coordinate of the corner point of the projection area as the position of the projection area. By means of the approach, the present application can improve the recognition speed, the anti-interference performance is strong, and the recognition accuracy is high.
222122212221333) to the light recycling assembly (220). The light valve (230) comprises an image displaying surface. The pre-configured light spot shape of the first polarized light matches the shape of the image displaying surface. The light recycling assembly (220) and the projection device (200) shape and recycle the illumination light, thereby achieving light circulation and effectively improving light utilization efficiency.
A light source system (100), comprising a first light source (1), a second light source (2), a first light guide element (3), and a first beam combining element (4). The first and second light sources (1, 2) respectively comprise a plurality of lasers; the first light source (1) and the second light source (2) are provided respectively in a first direction (X) and a second direction (Y) in a staggered manner, and the first direction (X) is perpendicular to the second direction (Y). The first light source (1) emits a first beam group (110), and the first beam group (110) comprises a plurality of first laser beams; the first light guide element (3) guides the first beam group to the first beam combining element (4); the second light source (2) emits a second beam group (210), and the second beam group (210) comprises a plurality of second laser beams; the first beam combining element (4) transmits the first beam group (110) and reflects the second beam group (210) to form first combined light. In the first combined light, a plurality of first and second beam groups (110, 210) are alternately intercalated in the first direction (X), the plurality of first and second laser beams are alternately intercalated in a third direction (Y'), and the first direction (X) is perpendicular to the third direction (Y').
The present application relates to the technical field of projection display, and in particular to a light source device and a projection system. The light source device comprises at least one light source module, an optical fiber interface structure, and an optical field shaping module; the light source module comprises at least one projection light source and a corresponding optical fiber; the optical fiber is coupled to the projection light source by means of a coupling lens, and light emitted by the projection light source is incident on the optical fiber by means of the coupling lens and exits from a light exit end of the optical fiber; optical fiber interfaces distributed in an array are formed on the optical fiber interface structure; according to predetermined requirements, a light exit end of the at least one light source module can be adapted and assembled to the optical fiber interfaces, so as to form array light having a specific light distribution on a light exit surface of the optical fiber interface structure; the light field shaping module is provided corresponding to the optical fiber interface structure to shape the array light exited from the light exit surface of the optical fiber interface structure to form projection light. The light source device of the present application improves the development efficiency of the light source.
A projection device position adjusting bracket (100). The projection device position adjusting bracket (100) comprises a fixing base (110), a first adjusting mechanism (130), and a second adjusting mechanism (140). The fixing base (110) is used for fixing a projection device (160), and a first transmission member (116) is fixedly connected to the fixing base (110). The first adjusting mechanism (130) is provided on a side of the fixing base (110) close to the first transmission member (116); the first adjusting mechanism (130) comprises a first adjusting base (131), a first driving assembly (133), and a second transmission member (137), and the first driving assembly (133) is transmittingly connected to the first transmission member (116) so as to drive the fixing base (110) to rotate around a first shaft (101). The second adjusting mechanism (140) is located on a side of the first adjusting mechanism (130) facing away from the fixing base (110); the second adjusting mechanism (140) comprises a second adjusting base (141) and a second driving assembly (143), and the second driving assembly (143) is transmittingly connected to the second transmission member (137); the second transmission member (137) drives the first adjusting base (131), and the first adjusting base (131) drives the fixing base (110) to do a lifting/lowering motion or a pitching motion.
F16M 11/04 - Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
F16M 11/10 - Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
A lens adjusting device and a projection apparatus. The lens adjusting device comprises a lens support (1), an adjusting support (2), a first direction adjusting assembly (3), a second direction adjusting assembly (4), a guide arm (5), an upper cover (6) and a shell body (7), wherein the first direction adjusting assembly (3) and the second direction adjusting assembly (4) are arranged on the upper cover (6), and the lens support (1), the adjusting support (2) and the guide arm (5) are accommodated in a space formed by the upper cover (6) and the shell body (7); and the first direction adjusting assembly (3) drives the lens support (1) to slide in a first direction, the second direction adjusting assembly (4) and the guide arm (5) drive the adjusting support (2) to rotate, the lens support (1) moves in a second direction, and the first direction is perpendicular to the second direction. By means of the lens adjusting device, the adjusting assemblies are used for making the lens move in one direction, the guide arm (5) drives the lens to rotate, and a component forms a movement in another direction, so as to adjust the position of a lens; and the two direction adjusting assemblies are relatively independent, and the whole adjusting device has a simple and compact structure and occupies a small space, thereby reducing the manufacturing cost and facilitating operation.
The embodiments of the present application provide a projection system and a projection device. The projection system comprises a light source (11), a spatial light modulator (12) and a displacement structure (13); the light source (11) is used for emitting display light; the spatial light modulator (12) is provided on a light path of the display light emitted from the light source (11), and the spatial light modulator (12) is used for modulating the display light emitted from the light source (11), so as to emit image light; the spatial light modulator (12) comprises a plurality of pixel units arranged in an array, each pixel unit comprising a plurality of sub-pixel units; and the displacement structure (13) is used for moving images displayed by the plurality of sub-pixel units of the spatial light modulator (12), so that in any image, each sub-pixel unit can display white light in space. The resolution of the spatial light modulator (12) can be improved without reducing the aperture ratio of the spatial light modulator (12), and the problem of color separation can be further avoided.
H04N 9/31 - Projection devices for colour picture display
H04N 5/74 - Projection arrangements for image reproduction, e.g. using eidophor
G03B 21/00 - Projectors or projection-type viewers; Accessories therefor
G02F 1/13 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
44.
FRESNEL COMBINED OPTICAL DEVICE AND THREE-DIMENSIONAL DISPLAY APPARATUS
A Fresnel combined optical device (1000), which is used for modulating quasi-parallel light beams (31), and which comprises a Fresnel optical element (100) and a light deflection element (200). The Fresnel optical element (100) comprises several Fresnel prism units. Each Fresnel prism unit comprises a prism surface (110) and a plane (120) that face away from each other. The prism surface (110) is used to receive a quasi-parallel light beam (31). The light deflection element (200) comprises a first surface (210) and a second surface (220). The plane (120) of each Fresnel prism unit is attached to the first surface (210). The surface shape of the prism surface (110) of the Fresnel prism unit where the plane (120) is located matches the surface shape of the second surface (220), so that each Fresnel prism unit and the matching light deflection element (200) thereof form an optical flat unit, and thus the Fresnel combined optical device (1000) is equivalent to an optical panel. The quasi-parallel beams (31) may be modulated by different positions of the Fresnel combined optical device (1000) to then control the shape of an image plane (32), thus achieving a naked eye three-dimensional display effect.
G02B 30/56 - Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images the image being built up from image elements distributed over a 3D volume, e.g. voxels by projecting aerial or floating images
A light source apparatus (200), comprising a light source module (240) and a wavelength conversion apparatus (280), wherein the light source module (240) comprises several light-emitting units (242) arranged at intervals in a strip-shaped structure, and each light-emitting unit (242) may independently emit a light beam. The wavelength conversion apparatus (280) comprises wavelength conversion regions (281) and a non-wavelength conversion region (283). The wavelength conversion regions (281) are used to convert the light beams emitted by the light-emitting units (242) into excited light. The wavelength conversion regions (281) and the non-wavelength conversion region (283) enter emitting paths of the light beams of the light source module (240) in time sequence. The light source module (240) rotates and moves so as to make the light beams emitted by the light-emitting units (242) irradiate to different positions of the wavelength conversion regions (281) or the non-wavelength conversion region (283), and then by means of separately controlling the intensity of the emitted beams of each light-emitting unit (242), the local dimming effect of the light source apparatus (200) may be achieved, which effectively reduces the number of light-emitting units (242) compared to linearly arrayed lamp beads. Further provided is a projection device (1000).
A display method, comprising: determining the maximum light source brightness, an initial light source brightness within the current frame and a maximum initial grayscale signal within the current frame; determining a target light source brightness within the current frame according to the product of the maximum light source brightness and the maximum initial grayscale signal; selecting, on the basis of the initial light source brightness and the target light source brightness, part of a global brightness change rule to generate a light source brightness change rule within the current frame; determining a final grayscale signal of each pixel point within the current frame on the basis of the light source brightness change rule and an initial grayscale signal of each pixel point within the current frame, or determining the final grayscale signal of each pixel point within the current frame on the basis of the initial light source brightness, the target light source brightness and the initial grayscale signal of each pixel point within the current frame and by means of looking up a grayscale mapping relationship table; and displaying the current frame on the basis of the final grayscale signal of each pixel point within the current frame. In the method, a display brightness anomaly which may be caused by a current changing over time within a frame is compensated for. Further provided is a display apparatus, comprising a memory and a processor, the processor being used for executing the display method.
Provided is a display apparatus. The display apparatus comprises an image processing module, an array light source, a light source displacement module and an imaging module, wherein the image processing module is used for splitting a frame of image into a plurality of subframes displayed in a time division multiplexing manner, each subframe comprising a plurality of pixels; the array light source comprises a plurality of light sources arranged in an array, the plurality of light sources being used for forming a plurality of light spots in a one-to-one correspondence manner, and the plurality of light spots corresponding to the plurality of subframes displayed in the time division multiplexing manner; the light source displacement module is used for moving the plurality of light spots, so as to arrange the light spots into a plurality of light spots displayed in a time sequence that correspond to the plurality of pixels; and the imaging module is used for imaging each subframe on a screen. The display apparatus provided in the present invention arranges light spots of a sparse array light source into a densely arranged array light source corresponding to pixels in an image of a video signal module, so as to display a high-resolution variable dot matrix or variable structured light, and to display a high-brightness and high-resolution image.
The present invention provides a projection system, comprising a laser light source, a beam splitting wheel, a fluorescent wheel, and an optical processing system. The beam splitting wheel comprises a partial beam splitting area and a guide area, the partial beam splitting area is used for splitting excitation light emitted by the laser light source into first excitation light and second excitation light, and the guide area is used for guiding the excitation light emitted by the laser light source to exit along a second optical path; the fluorescent wheel is used for converting the second excitation light from the second optical path into first excited light and converting the excitation light emitted by the laser light source into second excited light; and the optical processing system comprises a beam splitting member, a first spatial light modulator, and a second spatial light modulator. The first spatial light modulator and the second spatial light modulator of the projection system provided in the present invention can operate at full time, and the beam splitting of the excitation light by the partial beam splitting area reduces the power for displaying the excitation light, and improves the display bit depth of the projection system.
Disclosed are a lens support driving mechanism (100), a lens support adjusting device (200), and a projector. The lens support driving mechanism (100) comprises a driving member (110) with a driving shaft (112), a shaft sleeve (120), and a fixing member (130). The shaft sleeve (120) comprises a sleeve body (121), the sleeve body (121) being sleeved on the driving shaft (112) and being in threaded connection with the driving shaft (112), and an outer side wall of the sleeve body (121) comprising a first connecting part (123). The fixing member (130) comprises a fixing body (131) and a second connecting part (133) connected to the fixing body (131), the second connecting part (133) being detachably connected to the first connecting part (123). The driving member (110) is used for being fixed on a lens fixing support, the fixing member (130) is used for being fixed on a lens moving support, and when the driving shaft (112) rotates, the shaft sleeve (120) moves in the axial direction of the driving shaft (112), such that the lens moving support moves in the axial direction of the driving shaft (112) relative to the lens fixing support. The lens support adjusting device (200) comprises a first support (210), a second support (220), a lens clamp frame (230) and the lens support driving mechanism (100). The lens support driving mechanism (100) detachably connects the shaft sleeve (120) to the fixing member (130), thereby facilitating maintenance and replacement, and facilitating the reduction of production cost.
Disclosed is a pitching adjusting device (100), comprising a bottom frame assembly (10), a top frame assembly (20), a lead screw assembly (30) and a push rod assembly (40). The bottom frame assembly (10) comprises a bottom frame framework (11); the top frame assembly (20) comprises a top frame framework (21), a first supporting leg (22) and a second supporting leg (23), wherein the first supporting leg (22) and the second supporting leg (23) are connected to the top frame framework (21) and are arranged on the bottom frame framework (11) in a lockable mode, and wherein the top frame framework (21) rotates with the first supporting leg (22) or the second supporting leg (23) selectively as a fulcrum; the lead screw assembly (30) comprises a lead screw (31) and a lead screw nut (32), wherein the lead screw (31) is rotatably arranged on the bottom frame framework (11), and wherein the lead screw nut (32) is sleeved on the periphery of the lead screw (31); and the push rod assembly (40) comprises a push rod (41) and a connecting rod (42), wherein the push rod (41) is connected to the lead screw nut (32), and wherein one end of the connecting rod (42) is rotatably connected to the top frame framework (21) and the other end of the connecting rod (42) is rotatably connected to the push rod (41). The pitching adjusting device can be switched between a looking-down state and a looking-up state, and is suitable for various usage scenarios.
F16M 11/10 - Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting around a horizontal axis
An optical projector lighting system (200, 300), comprising a laser light source (210, 310), a first spatial light modulator (221, 321), a second spatial light modulator (222, 322), a first light splitting/combining device (231, 331), and a second light splitting/combining device (232, 332). The laser light source (210, 310) is used for emitting three primary color light, the three primary color light comprises first color light, second color light, and third color light, optical power of the third color light is greater than that of the first color light and greater than that of the second color light, and the third color light comprises first polarized light and second polarized light. The first light splitting/combining device (231, 331) is used for guiding the first polarized light to the first spatial light modulator (221, 321) for modulation, guiding the second polarized light to the second spatial light modulator (222, 322) for modulation, and is also used for guiding the first color light and the second color light to the first spatial light modulator (221, 321) or the second spatial light modulator (222, 322) for modulation; the second light splitting/combining device (232, 332) is used for combining a modulated light beam and emitting same. According to the optical projector lighting system (200, 300), optical power balance in a wide color gamut is achieved, a heat load is balanced, and a light output amount of projection is improved.
Provided is a projection picture correction method. The method comprises: a projection terminal projecting a scanning line onto a screen, and sending projection picture coordinate information of the scanning line on a projection picture to the screen; the screen controlling at least four photoelectric sensors to perform brightness measurement; when each photoelectric sensor is illuminated by the scanning line, the screen performing parsing to obtain projection picture coordinate information of each photoelectric sensor; the screen performing calculation according to screen coordinate information and the projection picture coordinate information of each photoelectric sensor, so as to obtain corresponding coordinate information of each photoelectric sensor, and sending same to the projection terminal; and the projection terminal calculating a transformation matrix between the current projection picture and the screen according to the corresponding coordinate information, and taking the transformation matrix as an input parameter for projection picture correction, so as to realize the adaptation of a boundary of the projection picture to a boundary of the screen. Compared with the related art, the projection picture correction method of the present invention has a simple operation, a simple computation process, and a high efficiency of the automatic correction of a projection picture.
A compound eye module (3), comprising a plurality of compound eyes (31). The plurality of compound eyes (31) can be assembled and fitted according to predetermined requirements to form the compound eye module (3) having a specific optical function. Also provided is a light source apparatus (100), comprising a light-emitting device group (1), a light-combining module (2), and the compound eye module (3). The light-emitting device group (1) is used for emitting a plurality of light beams; the light-emitting device group (1) comprises a plurality of light-emitting devices (11); each light-emitting device (11) emits a light beam; the light-combining module (2) is used for guiding the plurality of light beams emitted by the light-emitting device group (1) to form a plurality of light spots; the compound eye module (3) performs dodging processing on the plurality of light spots guided by the light-combining module (2); and the compound eyes (31) have one-to-one correspondence to the light spots. Also provided is a projection device using the light source apparatus (100). The compound eye module (3), the light source apparatus (100), and the projection device have good dodging effect, high process feasibility, and small light source size.
An image display method for a display device, and a display device and a computer-readable storage medium. The method comprises: acquiring a first image having a first resolution (S10); classifying pixels in the first image according to odd-numbered and even-numbered rows and columns (S20); by using pixel gaps, performing image downsampling on the first image on the basis of each type of pixel in the first image, so as to obtain a plurality of different second images having a second resolution, wherein the second resolution is consistent with the resolution of a display device (S30); and according to a time sequence, displaying the plurality of second images in a mutually offset manner, so as to obtain images having an enhanced visible display resolution (S40). By using the method, an important factor, i.e. a pixel gap of a display device, is introduced during the process of performing image downsampling on a first image, such that the presented image is clearer, thereby improving the display capabilities of the display device.
G09G 3/20 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix
G09F 9/35 - Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
55.
LIGHT SOURCE DEVICE, IMAGING DEVICE AND DISPLAY DEVICE
Disclosed by the present application are a light source device, a display device, and an imaging device. The light source device comprises a light source array module, a control module, and a light spot shifting device; the light source array module comprises a plurality of light sources arranged in an array, and each light source emits a light spot corresponding to a pixel of a frame of a target image, and the target image comprises a plurality of sub-frames; the light spot shifting device is used to move the position of the light spots under the control of the control module; the control module is configured to control the light spot shifting device according to a time sequence so that the position of the light spots correspond to each sub-frame in turn; and the control module is configured to control the light spot shifting device according to the pixel position of each sub-frame, so that the positions of the light spots at moments corresponding to the sub-frames are in one-to-one correspondence with the positions of the pixels comprised in the sub-frame, wherein at least one pixel of other sub-frames is interposed between at least two adjacent pixels of each sub-frame. By means of the foregoing manner, the present application may increase the resolution and efficiency.
Disclosed is an imaging method, comprising: splitting one frame target image to obtain a plurality of subframes, at least one pixel of other subframes being inserted between at least two adjacent pixels of each subframe; according to the positions of pixels of each subframe, moving, by a light spot shifting device according to the time sequence, the position of light spots emitted by a light source array module, so that the position of each light spot sequentially corresponds to that of each subframe; and imaging the light spots emitted by the light source array module and corresponding to a plurality of subframes to obtain an image light, wherein the light source array module comprises a plurality of light sources; a beam emitted by each of the plurality of light sources forms a light spot corresponding to one pixel of a target image; at the moment corresponding to the subframe, the positions of the plurality of light spots formed by the plurality of light sources have one-to-one correspondence to the positions of a plurality of pixels comprised by the subframe. By means of the approach, the present application can increase the resolution and the efficiency.
Disclosed are an optical system and a projection system. The light source system comprises a first light source, a second light source, a light combining assembly, a compound eye lens set and a collection lens, wherein the first light source is configured to emit a first light beam; the second light source is configured to emit a second light beam, and the optical extension of the first light beam is larger than that of the second light beam; the light combining assembly is configured to combine the first light beam and the second light beam; the compound eye lens set comprises a first compound eye lens and a second compound eye lens, and is configured to homogenize the combined first light beam and second light beam; and the collection lens is located on a side of the compound eye lenses that are far away from the light combining assembly, and is configured to focus the first light beam and the second light beam that are homogenized, wherein the second compound eye lens is located between the first compound eye lens and the collection lens, and is arranged to deviate from the focal point of the collection lens. The present application improves the uniformity of the color and brightness and the safety of the light source system by means of arranging the second compound eye lens to deviate from the focal point of the collection lens.
Embodiments of the present application relate to the technical field of projection display, and provide a projection display system. The projection display system comprises a lens, at least two spatial light modulators, and a light combining device. The lens comprises a rear-end lens group and at least two front-end lens groups. The at least two front-end lens groups are respectively located on two sides of an aperture diaphragm position of the lens. Multiple front-end light paths of the rear-end lens group are combined into one path at the aperture diaphragm of the lens. The at least two spatial light modulators have one-to-one correspondence to the at least two front-end lens groups and are located in the front-end light paths of the corresponding front-end lens groups. The light combining device is configured at the aperture diaphragm position of the lens and comprises guide surfaces having one-to-one correspondence to the at least two front-end lens groups. The guide surfaces guide emitted beams of the corresponding front-end lens groups to the rear-end lens group to be emitted. The projection display system can implement a display image having high resolution and obtain a good resolution effect.
Disclosed is a screen tensioning device, comprising: a screen used for reflecting projection light and comprising end portions and a middle portion; a screen frame for carrying the screen, with the end portions and the middle portion of the screen being arranged on the light incident side and the backlight side of the screen frame; connecting members provided at the end portions of the screen and driving the screen to move; connecting clamping bars, with one end being clamped to the connecting members, and the other end thereof cooperating with the screen frame to indirectly fix the screen on the screen frame; and adjusting members, which are arranged between the screen frame and the connecting clamping bars in a penetrating manner for controlling the connecting clamping bars to move in a linear motion in the direction perpendicular to a side frame of the screen frame so as to drive the connecting members to move, such that the two connecting members at two opposite ends form pulling forces on the screen in opposite directions. According to the screen tensioning device of the present invention, the corresponding adjusting members which can move in a linear motion are provided, the connecting clamping bars and the connecting members apply pulling forces to the screen in opposite directions to tension the screen, and the adjusting members can be adjusted to adjust the tension of the screen, thereby meeting different usage requirements of users.
Provided in the present utility model is a soft projection screen mounting construct, which comprises a soft projection screen assembly and an inner edge frame assembly. The soft screen assembly comprises a screen body and positioning elements provided at the periphery of the screen body. The inner edge frame assembly comprises an inner edge frame, a sliding element, and an adjusting element. The sliding element and the positioning element hang the screen body on the inner edge frame assembly via a detachable structure. The inner edge frame is provided with a mounting groove extending in the length direction thereof. The sliding element is engaged in the mounting groove and slides in the length direction of the inner edge frame, thus providing the screen body with a tensioning force in the length direction of the inner edge frame. A mounting through hole is provided at the bottom of the mounting groove. The adjusting element runs though the mounting through hole and is abutted against the sliding element. The soft projection screen mounting construct allows the degree of tensioning of the screen to be adjusted flexibly as required and, at the same time, provides increased flatness.
The present application relates to the technical field of projection. Specifically disclosed are a projection device, an automatic focusing method, and an apparatus having a storage function. A control module of the projection device controls a driving module to drive the projection device to move so that a projection module forms multiple projected pictures by means of projection according to a preset time sequence, and controls an image pickup module to capture the multiple projected pictures according to the preset time sequence, so as to obtain multiple images to be analyzed. The control module is further used for controlling a calculation module to synchronously calculate, when the image pickup module captures the projected pictures frame by frame, sharpness values of all the images to be analyzed to obtain sharpness value sequences, and analyze two adjacent sharpness value sequences to determine the best focus position and return time required to move to the best focus position. The control module is further used for controlling the driving module to drive the projection device to continuously move at a preset speed in the opposite direction of the current movement direction for the return time. In this way, the focusing precision can be improved, and the focusing time can be shortened.
A light source system and a projection system: a light-emitting assembly (11) in the light source system is used to generate excitation light; a light guide element (12) is used to guide and control the transmission direction of the excitation light; a collecting lens assembly (13) is used to collect the excitation light, and there is a preset inclination angle between a center line of the collecting lens assembly (13) and the transmission direction of the excitation light, so that the excitation light is incident from the edge of the collecting lens assembly (13); a wavelength conversion device (14) is used to receive the excitation light and generate corresponding stimulated light, and reflect the stimulated light and unexcited excitation light together to the collecting lens assembly (13); the light guide element (12) comprises a reflection region (121) and a transmission region (122); the area of the reflection region (121) is larger than the size of a spot formed by the excitation light on the light guide element (12), and the reflection region (121) is used to reflect the excitation light and transmit the stimulated light; the transmission region (122) is used to transmit the excitation light and the stimulated light; and the stimulated light and the unexcited excitation light are combined into white light. The overall volume of the light source system may be reduced, and the light output efficiency of a light source may be increased.
Disclosed in the embodiments of the present application are a projection method, a projection device and a storage medium. The projection method comprises: projecting a display image by means of a first light source, and projecting a reference image by means of a second light source at a preset time interval; acquiring the real-time projection position corresponding to the reference image; determining whether the real-time projection position is different from a target projection position; and if so, adjusting the optical axis for projecting the display image to enable the real-time projection position to be closer to the target projection position. In this way, when the obtained real-time projection position corresponding to a reference image projected by a second light source at a preset time interval is different from a target projection position, the optical axis for projecting a display image can be adjusted to enable the real-time projection position to be closer to the target projection position, thereby realizing adjustment of the projection effect without affecting the projecting of the display image, and solving the problem that the quality of the projection image is reduced due to pixel offset.
Provided in the embodiments of the present application is a light beam deviation device, comprising a disk and a driver, wherein the disk comprises a plurality of disk regions, which are configured to have a certain angle of inclination relative to a scanning light beam; and the driver is used for driving the disk to rotate, wherein the refractive indexes or the thicknesses or the regional angles of inclination of the plurality of disk regions gradually increase/decrease in the rotating direction, and the scanning light beam is sequentially deviated by a preset deviation amount by means of the plurality of disk regions during a period of rotation. When a scanning light beam is incident on an incident face which is inclined relative to the scanning light beam, the scanning light beam is emitted along a different light path under the deviation action of different incident faces, and therefore, according to different deviation requirements for the scanning light beam, different disk regions can be rotated to the light path of the scanning light beam, thereby achieving precise pixel expansion and improving the display resolution. In addition, the present application further provides a projection system.
G02B 26/00 - Optical devices or arrangements for the control of light using movable or deformable optical elements
G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
Disclosed in the present application are a projector placement position adjustment method and a projector. The projector placement position adjustment method comprises: obtaining a projection screen picture image; processing the projection screen picture image to extract a graphic of a projection screen display area in the projection screen picture image; calculating a deviation value between the graphic of the projection screen display area and a standard graphic, the standard graphic being a graphic of the projection screen display area obtained when a projector is placed in a preset position; generating projector placement position adjustment instruction information according to the deviation value; and adjusting the placement position of the projector according to the adjustment instruction information. According to the projector placement position adjustment method provided by the present application, during the use of a projector, a user can conveniently and quickly complete an operation of overlapping a projection picture and a projection screen, thus effectively improving the user experience.
The present invention provides a light source apparatus, comprising: a laser light source; a light splitting/combining unit; and a wavelength conversion unit, comprising a wavelength conversion area and a non-wavelength conversion area, wherein if the wavelength conversion area is located on a light path of exciting light, a part of the exciting light is wavelength-converted to form excited light and the remaining exciting light becomes residual light and is reflected, together with the excited light, from the wavelength conversion area to the light splitting/combining unit; the exciting light forms primary color light in the non-wavelength conversion area and is emitted to the light splitting/combining unit; and the non-wavelength conversion area comprises a light path shifting module for making a light path in which the primary color light is emitted to the light splitting/combining unit not overlap with a light path in which the residual light is emitted to the light splitting/combining unit; and a light concentrating unit, comprising a light concentrating area and a light filtering area, wherein the excited light and the primary color light are guided to the light concentrating area by the light splitting/combining unit so as to enter a subsequent light path, and the residual light is guided to the light filtering area by the light splitting/combining unit so as to be filtered. Therefore, the differentiation and filtering of primary color light and residual light are implemented. The present invention also provides a projection device.
A DLP vehicle lamp, comprising an illumination light source (301), a digital micromirror device (DMD) (302), an imaging lens (303), and an OFF light utilization apparatus (304). The illumination light source (301) is used for emitting illumination light; the DMD (302) has an ON state and an OFF state, and the DMD (302) is used for receiving irradiation of the illumination light, and respectively generating first reflected light and second reflected light in the ON state and the OFF state; the imaging lens (303) is used for receiving the first reflected light in the ON state to form high beam irradiation; the OFF light utilization apparatus (304) is used for receiving the second reflected light in the OFF state to form low beam irradiation. The DLP vehicle lamp uses the ON state and the OFF state of the DMD (302) to implement high beam illumination and low beam illumination, so that the utilization efficiency of light can be effectively improved, and a small size and high brightness can be achieved.
A current control method (100, 200), a switching power supply circuit (20, 300), and a projection device (400), wherein the current control method (100, 200) is applied to the switching power supply circuit (20, 300); and the switching power supply circuit (20, 300) comprises at least a load capacitor (C1) for charging a light source (12, 410) and a first switch tube (Q1) for controlling the light source (12, 410) to turn on and off. The current control method (100, 200) comprises: when the driving current of the light source (12, 410) needs to be switched, comparing a second driving current required after switching with a first driving current before switching (S110, S210); if the second driving current is greater than or equal to the first driving current, pre-charging the load capacitor (C1) during the spoke time of a color wheel (14, 420) (S120); and if the second driving current is less than the first driving current, delaying a turn-on signal of the first switch tube (Q1), and during the delay, controlling the first switch tube (Q1) to work in a linear region (S130). The current control method (100, 200) may implement the fast and stable switching of any current of the light source (12, 410).
Disclosed in the embodiments of the present application are a light source and a projection apparatus. The light source comprises a laser light source and a color wheel; the color wheel comprises at least two partitions; different partitions are irradiated by the laser light source and then generate light of different primary colors, or different partitions are used for changing the direction of the light path of the laser light source; and the proportion of each partition is relatively balanced, and is set to be a preset proportion and used for improving a display frame rate. The light source provided by the present embodiment sets the proportion of the partition of the color wheel to be a relatively balanced preset proportion, so that the light of the primary colors corresponding to different partitions is combined and then can meet a preset color balancing standard, and thus, the time duty ratio of the light of each primary color can be more balanced when a white field is displayed, thereby achieving the improvement of the display frame rate while keeping a display effect.
A video signal processing system and method, a projection system, and a projection method. The video signal processing system (100) comprises an image processing unit (110), wherein the image processing unit (110) is used for segmenting each frame of color image into M monochromatic light images, combining the monochromatic light images of the same color that are obtained by means of segmentation to form at least one monochromatic image frame, and outputting each monochromatic image frame to a DLP projection apparatus (200). A color image is segmented to form monochromatic light images; the monochromatic light images of the same color are then combined to form at least one monochromatic image frame; the monochromatic image frames are transmitted to a DLP projection apparatus (200) for guidance; and finally, same are subjected to light combination by means of a light combination element (300) and are then emitted. Since each monochromatic image frame is formed by combining a plurality of monochromatic light images, a monochromatic image frame comprises a plurality of monochromatic light images of the same color, which is equivalent to being formed by a plurality of frames of monochromatic light images, and therefore, the frame rate of each monochromatic image frame is improved relative to an original color image.
A color wheel heat dissipation device (10) and a projection apparatus using same. The color wheel heat dissipation device (10) comprises a color wheel substrate (100), a color wheel phosphor portion (200), multiple blades (300) and a current collecting plate (400). The color wheel phosphor portion (200) is provided at the color wheel substrate (100). The multiple blades (300) are provided at intervals around a central axis of the color wheel substrate (100) on a main surface of one side of the color wheel substrate (100). The current collecting plate (400) is annularly arranged around the central axis of the color wheel substrate (100), and covers respective sides of the multiple blades (300) away from the color wheel substrate (100). The current collecting plate (400) partially covers the multiple blades (300) in a radial direction of the color wheel substrate (100), thereby effectively dissipating heat for the color wheel phosphor portion (200).
Disclosed are a light source system and a projection system. The light source system comprises: a light emitting assembly and a uniform light device. The light emitting assembly is used for generating an exit light beam, the exit light beam comprising a middle light beam and marginal light beams located on the periphery of the middle light beam. The uniform light device is provided on an optical path of the exit light beam, and used for performing uniformity of light on the exit light beam to obtain an illuminating light beam. Some of the marginal light beams are reflected by the inner side wall of the uniform light device to generate mirror light beams, and the mirror light beams are overlapped with corresponding marginal light beams. By means of the approach, the present application can improve the sharpness of the marginal light beams and reduce overfilling.
An LCD panel (100) and a display device. The LCD panel (100) comprises multiple data line electrodes (110) and multiple scanning line electrodes (112) which are arranged perpendicular to each other, the data line electrodes (110) and the scanning line electrodes (112) divide the area of the LCD panel (100) into multiple grid areas, and each grid area is provided with a physical sub-pixel (121). Three physical sub-pixels (121) sequentially arranged in an extending direction of the data line electrodes (110) constitute a physical pixel (120), the three physical sub-pixels (121) comprise three different colors, and the three physical sub-pixels (121) in adjacent physical pixels (120) are arranged in the same order. The display device comprises the LCD panel (100) and a light beam shifting device (210). The light beam shifting device (210) is provided at a side of the LCD panel (100) and is used for shifting a light beam emitted by the physical sub-pixels (121) in the extending direction of the data line electrodes (110), and the shifting amount is an integral multiple of half of the length of the physical pixels (120) in a data line direction. By matching with a 120Hz refresh rate and a two-phase pixel shift technology XPR, the LCD panel (100) can achieve good resolution and improve the display effect.
G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals
A projection system comprises a projector (11), a projection screen (12), a first support assembly (13), a reflection device (15), and a position adjustment device (16). The projector (11) is used to emit a projection beam. The projection screen (12) is used to ultimately receive and display the projection beam emitted by the projector (11). The first support assembly (13) is used to support the projection screen (12). The reflection device (15) is provided on an optical path of an emission beam emitted by the projector (11) toward the projection screen (12). An included angle between the reflection device (15) and a horizontal direction is adjustable. The reflection device (15) is used to change a propagation direction of the emission beam, and reflects the projection beam to the projection screen (12). The position adjustment device (16) is used to adjust heights of the projector (11) and the reflection device (15) and included angles thereof with respect to the horizontal direction, so as to prevent the reflection device (15) from causing occlusion of image information displayed on the projection screen (12). The invention reduces the throw ratio, and improves the contrast of projection frames while preventing occlusion of projection frames.
Disclosed are a power source (10) and a light source system. The power source (10) comprises a control circuit (11) and at least one constant-current circuit (12). The control circuit (11) is used for receiving a current instruction and generating a control signal according to the current instruction. The constant-current circuit (12) is connected to the control circuit (11), and comprises a direct-current conversion circuit (121) and an amplification circuit (122) which are connected to each other, wherein the direct-current conversion circuit (121) is used for receiving a power supply signal and a control signal, and for converting the power supply signal into a constant current signal according to the control signal; and the amplification circuit (122) is used for converting the power supply signal into a voltage feedback signal, and for inputting the voltage feedback signal into the control circuit (11). The control circuit (11) is also used for controlling, after receiving the voltage feedback signal, the direct-current conversion circuit (121), so as to dynamically adjust the magnitude of the current signal output by the direct-current conversion circuit (121). A current value in the current instruction is the same as a current value of the constant current signal output by the direct-current conversion circuit (121). In the present application, by using the method, an output current can be dynamically adjusted, and a control circuit can be simplified.
A projection display system, comprising a light source component (11), a wavelength adjustment component (12), a modulation component (13), and a light combining component (14). The modulation component (13) comprises multiple light modulators (131, 132, 133). The light source component (11) is used for emitting a projection light comprising a three-primary-color light. The wavelength adjustment component (12) is used for receiving the projection light and adjusting a spectrum of the projection light, so that when the projection light having the spectrum adjusted is incident onto the multiple light modulators (131, 132, 133), a thermal load of the multiple light modulators (131, 132, 133) satisfies a thermal load balance condition. The multiple light modulators (131, 132, 133) are respectively disposed on an optical path of the three-primary-color light exited from the wavelength adjustment component (12), and are used for performing image modulation on the three-primary-color light to obtain a corresponding three-primary-color image light. The light combining component (14) is used for receiving the three-primary-color image light and performing light combining on the three-primary-color image light to form a color projection image. The projection display system can balance the thermal load of the multiple light modulators (131, 132, 133), and increases the display brightness without increasing the maximum thermal load of the multiple light modulators (131, 132, 133).
Disclosed is a light source structure (10), comprising a light source module (11), a light combining element (12), a first wavelength conversion element (13), a first heat dissipation element (14) and an adjustable reflection element (15), wherein the light source module (11) is configured for emitting excitation light; the light combining element (12) comprises a first light incident face (121) and a second light incident face (123); the first wavelength conversion element (13) faces the second light incident face (123); the first heat dissipation element (14) is configured for dissipating heat from the first wavelength conversion element (13); and the adjustable reflection element (15) comprises a first reflection section (152) and a second reflection section (154) adjacent to each other, the first reflection section (152) being configured for directing the excitation light emitted by the light source module (11) to the first light incident face (121) of the light combining element (12) along a first light path, and the second reflection section (154) being configured for directing the excitation light emitted by the light source module (11) to the first wavelength conversion element (13) along a second light path. According to the light source structure (10), the adjustable reflection element (15) and the first wavelength conversion element (13) are arranged separately, thereby improving the heat dissipation performance of the first wavelength conversion element (13). Further provided is a projection device.
A projection display system (10), comprising a light source assembly (11), a wavelength adjustment assembly (12) and a modulation assembly (13). The light source assembly (11) is used for emitting projection light. The wavelength adjustment assembly (12) is used for receiving the projection light and adjusting the spectrum of the projection light so as to improve the light visual performance of the projection light. The modulation assembly (13) is arranged on the exit light path of the wavelength adjustment assembly (12), and is used for performing image modulation of the light emitted by the wavelength adjustment assembly (12) to obtain corresponding image light so as to form a projected image. The projection display system (10) may improve the luminous efficiency of the projection light, thereby improving the display brightness.
A projection display system comprises a light source assembly (11), a wavelength adjustment assembly (12) and a modulation assembly (13). The light source assembly (11) is used to emit projection light. The wavelength adjustment assembly (12) is disposed on a light path of the projection light, and is used to adjust a spectrum of the projection light, such that a ratio of the luminous efficiency of the adjusted projection light to the luminous efficiency of monochromatic light corresponding to a primary wavelength of the projection light is greater than a preset ratio, and a color gamut of the adjusted projection light satisfies a preset color gamut coverage. The modulation assembly (13) is disposed on an emergent light path of the wavelength adjustment assembly (12), and is used to perform image modulation on light emitted from the wavelength adjustment assembly (12) and to output corresponding image light so as to form a projected image. The above arrangement enables a projection display system to attain a balance between brightness and a color gamut thereof.
An optical engine system (10) and a projection system (20). The optical engine system (10) comprises a light combining element (500) and modulators (200, 400); the modulators (200, 400) are configured to receive and modulate a first beam to emit first modulated light, and are further configured to receive and modulate a second beams to emit second modulated light; the first modulated light and the second modulated light relate to a same image frame, and every first pixel in the first modulated light and a second pixel corresponding to the first pixel in the second modulated light are staggered by a preset shift value on a projection surface. The light combining element (500) combines and emits the first modulated light and the second modulated light. When the first modulated light and the second modulated light are superimposed on each other, the purpose of pixel resolution extension is achieved, and then high-resolution image display is achieved.
Disclosed in the present application are a projection apparatus and an automatic focusing method therefor. The method comprises: by performing spectrum analysis on a currently projected virtual focus picture image, acquiring spectrum information of a current virtual focal spot according to spectrum information of the current virtual focus picture image, the current virtual focal spot being a spot formed by any one pixel point of the current virtual focus picture image; afterwards, searching for spectrum information that matches the spectrum information of the current virtual focal spot from spectrum information of multiple prestored preset virtual focal spots, so as to obtain target spectrum information, then a defocus distance corresponding to the target spectrum information may be acquired, and then controlling a motor to drive a lens group to move a target defocus distance, so as to implement focusing. By the means of the foregoing, the present application can reduce the calculation performance requirements of a focusing process, increase the efficiency of automatic focusing and increase the response speed of automatic focusing.
A device (30) for an extended pixel resolution and a projection display system (90). The device (30) comprises: an offset wheel (32), a compensation wheel (33), and a driver (31). The offset wheel (32) is used for receiving an incident light beam, and comprises multiple offset regions (321); the compensation wheel (33) is disposed on an emergent light path of the offset wheel (32), is used for receiving a light beam exiting from the offset wheel (32), and comprises multiple compensation regions (331); the driver (31) is connected to the offset wheel (32) and the compensation wheel (33), and is used for driving the offset wheel (32) and the compensation wheel (33) to rotate; the offset regions (321) are arranged corresponding to the compensation regions (331); the position of a virtual image formed after the incident light beam sequentially passes through the offset wheel (32) and the compensation wheel (33) is kept unchanged. The imaging phase difference can be eliminated, thereby making imaging clear.
A prism assembly (10), a light-emitting device (1), and a projection system. A prism (12) in the prism assembly (10) comprises a light incident surface (121), a functional surface (122) opposite to the light incident surface (121), and a light-splitting element (13) provided between the light incident surface (121) and the functional surface (122). Incident light is transmitted to the light-splitting element (13) via the light incident surface (121), and the light-splitting element (13) is used for reflecting at least part of the incident light out of the prism (12). When the incident light propagates in the prism (12), the angular distribution does not change, so that the area of the light-splitting element (13) is reduced, the etendue attenuation is reduced, and the efficiency of a light source is improved.
A color wheel (100) and a projection system (200), relating to the technical field of optics. The color wheel (100) comprises a wheel body, and a wavelength conversion layer (110) and a light splitting layer (120) adjacent to each other in the axial direction of the wheel body. The wavelength conversion layer (110) is used for converting excitation light into fluorescence; the light splitting layer (120) comprises a first section (121) and a second section (123); and laser light incident on the light splitting layer (120) is split, by means of the first section (121) and the second section (123), into primary color light and excitation light having different transmission directions or different polarization states. When the light splitting layer (120) is in the first section (121), the color wheel (100) emits a primary color light beam under irradiation of an excitation light source (210); and when the light splitting layer (120) is in the second section (123), the color wheel (100) emits an excitation light beam under the irradiation of the excitation light source (210). Since the primary color light beam and the excitation light beam have different transmission directions, the design of a multi-layer spatial optical path is achieved by using a multilayer structure of the color wheel (100), thus effectively reducing the thickness of a light beam when using laser light as a light source, thereby effectively compressing the volume of a light engine using laser light as a light source, and further improving the user experience.
A projection screen (1), comprising a first fabric screen (10), a second fabric screen (20), and an adhesive tape (30). The first fabric screen (10) comprises a first sound-transmitting area (11) and a first bonding area (12) that are connected to each other; a plurality of first through holes (111) are provided in the first sound-transmitting area (11), and a plurality of first blind holes (121) are provided in the first bonding area (12); the second fabric screen (20) comprises a second sound-transmitting area (21) and a second bonding area (22) that are connected to each other; a plurality of second through holes (211) are provided in the second sound-transmitting area (21), and a plurality of second blind holes (221) are provided in the second bonding area (22); the second bonding area (22) is adjacent to the first bonding area (12); and the adhesive tape (30) is attached to the second adhesive area (22) and the first adhesive area (12) to connect the first fabric screen (10) and the second fabric screen (20). The provision of the plurality of first blind holes (121) in the first bonding area (12) and the plurality of second blind holes (221) in the second bonding area (22) of the projection screen enables the brightness of the projection screen (1) to be consistent, thus improving the display effect of the projection screen (1).
A self-adaptive laser vehicle lamp that has high optical brightness, a simple overall structure, high imaging resolution and contrast, and a high light utilization rate, and that comprises a laser light source (101, 101a, 101b, 101c), a white light-generating unit (A), a non-uniform light-generating unit (B), a spatial light modulator (401, 401a, 401b, 401c), and an imaging lens (501, 501a, 501b, 501c). The white light-generating unit (A) comprises a wavelength conversion unit (201, 201a, 201b, 201c), which is a reflective structure used to generate first light (S1). The non-uniform light-generating unit (B) comprises a free-form curved reflective bowl (301) or a free-form curved lens (301a, 301b, 301c), which is used to collect the first light (S1) and map same into second light (S2) that has an intensity gradient distribution. The spatial light modulator (401, 401a, 401b, 401c) carries out image modulation according to the intensity gradient distribution of the second light (S2), and emits third light (S3). The imaging lens (501, 501a, 501b, 501c) images the third light (S3) to a near-light or far-light region so as to form self-adaptive illumination. The integration of a light beam collection function and the two functions of control and light distribution is achieved by means of one device only, which effectively reduces the volume of the vehicle lamp.
F21S 41/60 - Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
F21S 41/675 - Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
F21S 41/20 - Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
F21V 9/30 - Elements containing photoluminescent material distinct from or spaced from the light source
F21V 5/04 - Refractors for light sources of lens shape
Disclosed is a vision-based adaptive AR-HUD brightness adjustment method. The adjustment method comprises: acquiring a scene image in front of a vehicle window; generating an HUD display image according to the scene image, and acquiring the brightness distribution of the HUD display image; dividing the HUD display image into one or more image regions; calculating, according to the brightness distribution of the scene image, a target brightness corresponding to each of the image regions; and adjusting, according to the target brightness corresponding to the image region, a light source power corresponding to the image region. In the vision-based adaptive AR-HUD brightness adjustment method of the present invention, the intensity of ambient background light is quantitatively calculated by means of a visual perception method, a brightness-light source power mapping relationship is established according to the range of a comfortable brightness perceived by human eyes, and the brightness of an image finally displayed by an HUD is adjusted, so as to realize the dynamic adjustment of an HUD image brightness, such that not only can the overall perception and experience of a driver be improved, the overall power of an HUD is also reduced, thereby alleviating the energy consumption and heat dissipation pressure.
Disclosed is an image processing method, which is used for processing a source image, so as to obtain a target image. After the target image is superimposed with ambient light, a display image is output. The method comprises: acquiring the contrast of a dark field area of a source image; determining the contrast of the dark field area of a display image according to the contrast of the dark field area of the source image; acquiring ambient light brightness in a display area; calculating a brightness threshold of a dark field area of a target image according to the contrast of the dark field area of the display image and the ambient light brightness; according to the brightness threshold of the dark field area of the target image and a brightness threshold of the dark field area of the source image, selecting a tone mapping algorithm by means of a table lookup method; and performing image processing on the source image according to the selected tone mapping algorithm. According to the image processing method provided in the present application, image brightness distribution can be automatically optimized according to an ambient light field, thereby improving the visual perception of a projection picture.
Disclosed by the present application is a projection device, comprising a light source array module, an image processing unit and a driving unit. The light source array module comprises a first light-emitting element array that emits first primary color light, a second light-emitting element array that emits second primary color light, and a third light-emitting element array that emits third primary color light, wherein the first light-emitting element array, the second light-emitting element array, and the third light-emitting element array are all divided into M×N illumination regions. The image processing unit is used to divide an image to be projected into M×N image regions, and acquire brightness information of the first primary color light, the second primary color light and the third primary color light of each image region, and the image regions are in one-to-one correspondence with the illumination regions of the light source array module. The driving unit is used to sequentially drive the first light-emitting element array, the second light-emitting element array, and the third light-emitting element array in a time sequence according to the brightness information of the first primary color light, the second primary color light, and the third primary color light of each image region. The circuit structure is simplified, thus saving on costs and reducing power consumption.
Embodiments of the present application provide a touch sensing method and circuit, and an electronic device. The method is applied to a control unit, and the control unit is connected to a touch key by means of a pin. The method comprises: first switching the pin between a first configuration and a second configuration by means of time division multiplexing, wherein in the first configuration, a parasitic capacitor of the touch key is charged to a preset voltage by means of the pin, and when the parasitic capacitor is charged to the preset voltage, the pin is switched to the second configuration; and in the second configuration, the parasitic capacitor is discharged by means of the pin, and when a preset time arrives, the current voltage of the parasitic capacitor is measured; and then determining the sensing state of the touch key according to the current voltage. The hardware cost required by the touch sensing method provided by the present application is lower.
Disclosed are a light-guiding element and a light source device. The light-guiding element comprises a first region and second regions respectively located on opposite sides of the first region, wherein the first region is used for reflecting at least some first light and transmitting second light; the second regions are used for transmitting the first light and the second light; and the wavelength range of the first light is different from the wavelength range of the second light. By means of the method, the present application can improve the light-emitting efficiency and reduce the cost.
A lens heat dissipation mechanism (100) and a projection device (1000). The lens heat dissipation mechanism (100) comprises a shell (5) and a first heat dissipation member (10). The first heat dissipation member (10) is provided in the shell (5), penetrates through the shell (5), and is connected to a lens (1) located outside the shell (5). The first heat dissipation member receives heat conducted by the lens (1) and can move with respect to the shell (5) along with movement of the lens (1). The problem of heat dissipation of a rear lens group (3) during focusing of the lens (1) is solved.
A light source brightness adjustment method and system, and an electronic device and a computer readable storage medium. The light source brightness adjustment method comprises: obtaining brightness information of a video image; retrieving the brightness information in a pre-made lookup table to determine a control signal matching the brightness information, the pre-made lookup table comprising a variety of brightness information and corresponding control signals; and controlling, using the control signal, a power supply system to output a current value matching the brightness information so as to adjust the light source brightness of the video image. By setting the pre-made lookup table, the brightness information of the video image can directly correspond to the control signal. By using the control signal and combining video image synchronization information, a power supply drive current value is quickly and dynamically adjusted to realize the quick adjustment of the brightness of the video image so as to realize the brightness and darkness difference of different frame images. The contrast of the video image is improved, and the adjustment efficiency of the light source brightness is improved.
G09G 3/34 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source
G09G 3/36 - Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix by control of light from an independent source using liquid crystals
Provided is a photoelectric device provided with an anti-contamination apparatus; the device comprises an optical component, an optical chamber, and an anti-contamination apparatus; the optical chamber is an enclosed chamber and is used to accommodate the optical component; the anti-contamination apparatus is fixed in the optical chamber and comprises an adsorption apparatus, which comprises an adsorption body and/or a cold surface used for adsorbing substances in the atmosphere environment. Compared with the related technology, the photoelectric device provided with an anti-contamination apparatus in the present invention features better optical performance and a longer service life.
B01D 53/04 - Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
B01D 46/10 - Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
B01D 39/20 - Other self-supporting filtering material of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
An opto-mechanical system (10) and a projection device (1) applying same. The opto-mechanical system (10) comprises a light homogenizing assembly (100), an imaging lens group (200), a TIR prism (300), and an optical path preprocessing lens (400), wherein the light homogenizing assembly (100) receives incident light and performs light homogenizing to form emergent light for emergence; the imaging lens group (200) is provided on an optical path of the emergent light, and is used for performing imaging shaping on the emergent light; the TIR prism (300) is provided on the optical path of the emergent light subject to imaging shaping, and is used for shaping the emergent light to form illumination light; the optical path preprocessing lens (400) is located in front of the TIR prism (300), so as to perform preprocessing on a light spot of the emergent light before entering the TIR prism (300), thus offsetting the stretching and deformation of the light spot of the emergent light caused by the TIR prism (300) when the emergent light passes through the TIR prism (300). Because the optical path preprocessing lens (400) is provided, the opto-mechanical system (10) and the projection device (1) can offset the stretching of the emergent light when the emergent light passes through the TIR prism (300), thus reducing the deformation of the emergent light.
G03B 21/00 - Projectors or projection-type viewers; Accessories therefor
G02B 27/18 - Optical systems or apparatus not provided for by any of the groups , for optical projection, e.g. combination of mirror and condenser and objective
Disclosed is a projection device (1). The projection device comprises a lens (10), a lens rear shell (20) and an OFF light processing structure (40). The lens rear shell (20) is provided with an image light outlet (22) and an OFF light outlet (23), and the lens (10) is mounted at the image light outlet (22). The OFF light processing structure (40) is mounted at the OFF light outlet (23), and the OFF light processing structure (40) comprises a bottom surface (412), at least two first reflecting members (43) and a plurality of second reflecting members (45). The bottom surface (412) seals and blocks the OFF light outlet (23); the at least two first reflecting members (43) and the plurality of second reflecting members (45) extend from the bottom surface (412) to the interior of the lens rear shell (20); and the height of each first reflecting member (43) extending out of the bottom surface (412) is greater than the height of the second reflecting member (45) extending out of the bottom surface (412). The projection device (1) reduces OFF light incident on the lens (10), thereby improving the image contrast and imaging quality of the projection device (1).
An adjustable mounting assembly (100). The mounting assembly (100) comprises slide rails (11, 12), sliders (21, 22), and a movable locking bar (3); two sliders (21, 22) are provided and are respectively provided with a first opening slot (212) and a second opening slot (222); at least one of the first opening groove (212) and the second opening groove (222) is an inclined groove, so that there is a maximum distance and a minimum distance between the inclined surfaces of the bottoms of the two slots; when the movable locking bar (3) slides to the minimum distance, the sliders (21, 22) and the slide rails (11, 12) are in a locked state; and when the movable locking bar (3) slides to the maximum distance, the sliders (21, 22) and the slide rails (11, 12) are in an adjustable state. The mounting assembly (100) further comprises a connecting rod (4) and a fixing component (5). Only by controlling the relative position between the movable locking bar (3) and the connecting rod (4) by means of the fixing component (5), the automatic switch between the adjustable state and the locked state can be achieved, such that the screen height can be adjusted without removing the screen, the suspension of the screen is stable, and the installation and adjustment process is convenient.
F16M 13/02 - Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
The present application relates to the technical field of imaging display, and specifically disclosed thereby are a projection reflective screen coating and a preparation method therefor. A coating layer formed by the projection reflective screen coating has an average reflectivity of 10-30% for visible light in the wavelength range of 400-700 nm. The projection reflective screen coating comprises, in percentage by mass: 10-70% of film-forming resin, 0-5% of a crosslinker, 3-10% of aluminum silver paste, 3-10% of black paste, 5-15% of a discharge-promoting agent, 0.5-1% of a leveling agent, 0.5-3% of a dispersant, 0-0.5% of a defoamer and 10-75% of a first solvent. By using the means described above, the present application may significantly improve the brightness and contrast of a projection curtain, and reduce the impact of cluttered reflected light on the contrast of a screen while maintaining the considerable gain of the screen.
C09D 133/00 - Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, a; Coating compositions based on derivatives of such polymers
Provided in the present utility model is an optical assembly, comprising a heat-generating optical device, a heat-dissipation element, a thermal interface material layer, and a sealing member; the heat-generating optical device comprises a heat-generating surface, and the thermal interface material layer is disposed on the heat-generating surface; the heat-dissipation element is disposed on the thermal interface material layer and is in contact with the thermal interface material layer; the heat-dissipation element is provided with an opening recess or an exhaust channel for absorbing or discharging volatile substances in the thermal interface material layer; the sealing member is disposed on the periphery of the thermal interface material layer, and the sealing member is sealedly connected to the heat-generating optical device and the heat-dissipation element, respectively. The optical assembly provided by the present utility model can absorb or discharge volatile substances in the thermal interface material layer, thus preventing volatile substances in the thermal interface material layer from being absorbed onto the heat-generating optical device to thereby affect the imaging quality and reliability of an optical system. Thus, the material used for the thermal interface material layer no longer needs to be limited as needing to simultaneously have the characteristics of low conductivity, low volatility, and so on, and the material selection range of a thermal interface material is broadened.
A light source system (31) and a projection display device (30). The light source system (31) comprises a first light source assembly (101), a second light source assembly (102), a wavelength conversion device (103), and a light homogenizing device (104); the first light source assembly (101) is used for emitting at least two beams of exciting light; the second light source assembly (102) is used for emitting at least one beam of laser light; the wavelength conversion device (103) is provided on a light path of the at least two beams of exciting light and is used for converting the received at least two beams of exciting light into at least two beams of excited light; the light homogenizing device (104) is used for homogenizing the excited light and the laser light; the excited light and the laser light respectively form excited light spots and laser light spots on a light incident side of the light homogenizing device (104); the laser light spot is located between two adjacent excited light spots, and the two adjacent excited light spots are symmetrical with respect to the laser light spot; or the excited light spot is located between two adjacent laser light spots, and the two adjacent laser light spots are symmetrical with respect to the excited light spot. By setting, the light exiting uniformity of the light source system (31) can be improved, thereby improving the uniformity of projection display.
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