A projection system, comprising a first light source which is an array light source, the first light source being divided into a plurality of illumination areas, and each illumination area may be independently controllable so as to generate a first illumination light field of which the brightness and darkness may be modulated; a second light source comprises an illumination unit and a light steering unit; the light steering unit redistributes illumination light emitted from the illumination unit to generate a second illumination light field of which the brightness and darkness may be modulated, wherein the first and second illumination light fields overlap to generate a combined light field. Also provided is a projection display method. The goal of simultaneously increasing image peak value brightness and lowering image dark field brightness is achieved, and a projection system that has a high contrast ratio is thus obtained.
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.
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.
A method for authorized use of a projector, comprising the following steps: a projector encodes a license into a QR code and displays same by means of projection; a mobile terminal identifies the QR code to obtain the license and transmits the license and a local terminal identifier of the mobile terminal to a projector authorization server; the projector authorization service verifies the local terminal identifier and the license and generates verification information if the verification is successful, and transmits the verification information to the mobile terminal; the mobile terminal receives and displays the verification information; the projector receives the input verification information, locally verifies the verification information, and if the local verification is successful, obtains use authorization corresponding to authorization information.
G06K 7/14 - Methods or arrangements for sensing record carriers by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
G06K 19/06 - Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
A light-shielding frame and an LED display device are provided and respectively has excellent light-shielding performance and optical display performance. The light-shielding frame includes a retaining wall and hollow grids; the retaining wall includes first and second retaining walls connected in a stacked manner along a light-emitting direction of the grids, and each grid includes first and second grid portions. The thickness of the first retaining wall decreases from one end thereof close to the second retaining wall to the other end thereof distant from the second retaining wall to form a first draft angle; the thickness of the second retaining wall decreases from one end thereof close to the first retaining wall to the other end thereof distant from the first retaining wall to form a second draft angle; the first retaining wall has the same thickness as the second retaining wall in the connection position thereof.
H01L 25/075 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
6.
ACTUATOR, ACTUATOR CONTROL METHOD, PROJECTION DEVICE, AND PROJECTION DEVICE CONTROL METHOD
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.
Provided is a ceramic composite material and a wavelength converter. The ceramic composite material includes: an alumina matrix, a fluorescent powder uniformly distributed in the alumina matrix, and scattering centers uniformly distributed in the alumina matrix, wherein the alumina matrix is an alumina ceramics, the scattering centers are alumina particles, the alumina particles each have a particle diameter of 1 μm to 10 μm, and the fluorescent powder has a particle diameter of 13 μm to 20 μm.
Provided is a light source device, including: a laser generation unit configured to output laser light; a light modification element disposed in a light guide unit or between the light guide unit and a homogenizing unit and configured to cause an angular distribution of the laser light uniform and continuous; the light guide unit, configured to receive the laser light output by the laser generation unit and guide the laser light to the homogenizing unit; and the homogenizing unit, configured to receive the laser light from the light guide unit, and homogenize and output the laser light.
G02B 30/25 - Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer’s left and right eyes of the stereoscopic type using polarisation techniques
10.
WAVELENGTH CONVERSION APPARATUS, LIGHT SOURCE SYSTEM AND DISPLAY DEVICE
Provided are a wavelength conversion apparatus, a light source system including the same, and a display device including the light source system. The wavelength conversion apparatus includes an angle deflection region and a wavelength conversion region for converting incident second light into excited light and then emitting same. The angle deflection region includes deflection units, each of which includes a light emergent face for emitting first light. A first included angle is formed between the light emergent face and a reference plane. First included angles between light emergent faces of at least two deflection units and the reference plane are not equal. The deflection units are located on a light path of the first light in a time sequence, so as to change an emergent angle of the first light in the time sequence, such that the first light is successively scanned at a preset position to form virtual pixels.
G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
H04N 9/31 - Projection devices for colour picture display
11.
ROTATING POLYGON MIRROR, LINEAR ARRAY LIGHT SOURCE SCANNING DISPLAY SYSTEM, AND PROJECTOR
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.
A projection screen and a projection system are provided. The projection screen includes a microlens array layer, a filter layer, and an optical structure layer arranged sequentially from an incident side of a projection light. The microlens array layer includes microlens units. The filter layer has a predetermined transmittance and is provided with a light-transmissive hole. The optical structure layer includes an optical microstructure unit capable of reflecting the incident light. The light-transmissive hole in the filter layer is arranged on the basis of an optical axis of the microlens unit in the microlens array layer so that the light-transmissive hole is exactly located on a focal plane of the microlens unit, and the projection light is reflected by the microlens unit, and then exactly passes through the light-transmissive hole. The projection screen has a high screen gain.
A wavelength conversion device and a light-emitting device and a projection device using the wavelength conversion device are provided. The wavelength conversion device includes a substrate capable of rotating around a rotating shaft, the substrate includes a first surface and a second surface opposite to each other, and an annular side surface, which is formed between the first surface and the second surface and is not perpendicular to the first surface. The first surface is provided with a wavelength conversion material layer, and the annular side surface includes a first area and a second area. The first area and the second area are used to reflect incident light beams.
G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
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 display system, including light emitting device, light splitting device, first, second and third light modulators. The light emitting device emits first light and second light in time sequence. The light splitting device splits the first and second light into first and second wavelength range light along first and second optical paths, respectively, and guides part of the second light along the first optical path. The first and second light modulators modulate the light along the first and second optical paths, respectively; the light modulated by the first and second light modulators is combined to obtain third light along third optical path. The third light modulator is in optical path between the light emitting device and the light splitting device and modulates the first and second light from the light emitting device; or the third light modulator is in the third optical path and modulates the third light.
Provided is an optical coating for a projection screen, containing the following components in parts by weight: 2-15 parts of light-absorbing material, 5-20 parts of aluminum silver powder, 20-60 parts of acrylate oligomer, 10-45 parts of diluent, 0.5-15 parts of photoinitiator, and 0.1-6 parts of auxiliary agent; the light-absorbing material is one or more of carbon black, lamp black, iron black, and aniline black, and has an average particle size of 20-2000 nm; the aluminum silver powder is flake-shaped and has an average particle size of 3-10 μm.
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 system, comprising: a wavelength conversion layer (102, 202) used for receiving exciting light (L3) and generating excited light (L2); a transparent thermal conduction substrate (104, 204) used for supporting the wavelength conversion layer (102, 202), and an excitation light source which emits the exciting light (L3) from a side of the wavelength conversion layer (102, 202) to the wavelength conversion layer (102, 202); and a red light source which emits red light (L1) from a side of the transparent thermal conduction substrate (104, 204) to the wavelength conversion layer (102, 202). The light source system can effectively solve the problem of insufficient red light in fluorescent powder excitation technology.
F21V 9/45 - Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity by adjustment of photoluminescent elements
F21V 29/70 - Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
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.
Provided is a light source system, including: an excitation light source for emitting excitation light; a wavelength conversion device provided with a conversion layer which is used to perform wavelength conversion on at least a portion of the excitation light to obtain stimulated light, and to exit the stimulated light and the unconverted excitation light; and a dichroic assembly which is used to guide the stimulated light exited from the conversion layer to propagate along the second optical path, and finally to exit from the light source system along the exit optical path, and to guide at least a portion of the unconverted excitation light exited from the conversion layer (P) to transmit on a path, which is not the exit optical path. Further provided is a projection device comprising the above light source system.
G02B 27/14 - Beam splitting or combining systems operating by reflection only
G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
27.
COLOR WHEEL, LIGHT SOURCE SYSTEM AND DISPLAY DEVICE
Provided is a color wheel. The color wheel includes a substrate, a conversion layer disposed on the substrate for wavelength conversion of incident light and obtaining irradiated laser, a first filter layer for filtering the irradiated laser to obtain a first light for modulating an image in a first color gamut range, and a second filter layer for filtering the irradiated laser to obtain a second light for modulating an image in a second color gamut range. Planes, in which the light incident surface of the conversion layer, the light incident surface of the first filter layer and the light incident surface of the second filter layer are located respectively, are parallel or coincide with each other.
G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
A total reflection screen comprises a light diffusion layer, a total reflection layer and a light absorption layer arranged sequentially from an incidence side of the projected light. The light absorption layer can absorb an incident light. The light diffusion layer is used for increasing a divergence angle of emergent light. The total reflection layer comprises a plurality of microstructure units that is rotationally symmetrical and extends continuously in a plane of the total reflection screen. Each of the microstructure units comprises a first material layer disposed at the side of the light diffusion layer and a second material layer disposed at the side of the light absorption layer. The interface between the first material layer and the second material layer is comprised of two intersecting planes, which are disposed in such a way that the projected light is subjected to total reflection continuously at the two intersecting planes.
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.
A display system includes: a light source system configured to emit light beams; a scanner configured to scan the light beams on the surface of a spatial light modulator in the form of a light spot, the light spot corresponding to multiple pixels of the spatial light modulator; a spatial light modulator configured to modulate, according to an image modulation signal from a processing and control system, the light spot projected onto the spatial light modulator by the scanner to output image light; a processing and control system configured to output a light source timing modulation signal to a light source modulation device according to an input image signal and output an image modulation signal to the spatial light modulator; and a light source modulation devices configured to adjust the output brightness of the light source system according to the light source timing modulation signal.
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
38.
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).
An image display method includes according to image information of a current image frame to be displayed, adjusting the brightness of a first light source (11) having a first light field, and steering light of a second light source (12) to form a second light field, so as to enable the first light field provided by the second light source (11) and the second light field provided by the second light source (12) to work in concert to satisfy displaying of display partitions of the image frame to be displayed. The image display method implements high-dynamic range display of images, and facilitates improvement of dark field detail expression of images to be displayed. Also provided are an image display apparatus and a projection device.
A light source system and a projection apparatus are provided. The light source system includes a first light source, a second light source including a second blue laser light source, a wavelength conversion element configured to convert second blue laser light into excited light, and a controller. The first light source includes a first blue laser light source configured to emit first blue laser light, a red laser light source configured to emit red laser light, and a green laser light source configured to emit green laser light. The controller controls the first and second blue laser light sources, the red laser light source, and the green laser light source to combine the first blue laser light, the red laser light, and the green laser light to form light source light, or to combine the first blue laser light and the excited light to form the light source light.
A wavelength conversion device and a light source system, including: a substrate; a first light-emitting portion disposed on the substrate, wherein the first light-emitting portion includes a first light guide area and a counterweight area provided on the same layer as the first light guide area, the first light guide area being used for guiding first light, and the counterweight area being used for making the weight distribution of the wavelength conversion device substantially uniform; and a second light-emitting portion provided on the substrate on the same side as the first light-emitting portion, the second light-emitting portion including a conversion area, and the conversion area being used to convert at least a part of excitation light into excited light for emission when the excitation light is received.
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.
A screen comprises the following layers sequentially stacked from an incident side of projected light rays: a micro-lens layer, a transparent matrix layer, a total internal reflection layer, and a light-absorbing layer. The light-absorbing layer absorbs light passing through the micro-lens layer, the transparent matrix layer, and the total internal reflection layer. The micro-lens layer comprises a plurality of micro-lens units. The total internal reflection layer comprises a plurality of microstructure units. The microstructure unit has a lower first flat surface and an upper second flat surface. The first flat surface intersects the second flat surface. The plurality of microstructure units forms a serrated structure. The micro-lens units and the microstructure units are at least partially arranged in an alternating manner. The projected light rays converged toward the first flat surface exit after being totally internally reflected by the first flat surface and the second flat surface sequentially.
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
53.
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.
A screen splicing structure is provided. The screen splicing structure includes a substrate layer, a middle adhesive layer, and a surface layer. The substrate layer includes a first substrate and a second substrate. The second substrate is spliced with the first substrate, and a seam is formed at a splicing place. The surface layer and the middle adhesive layer are stacked. The surface layer covers the seam by bonding the middle adhesive layer and the substrate layer. The peeling strength of the surface layer and the substrate layer is greater than or equal to 1,000 gf/inch. A method for forming the screen splicing structure is also provided.
C09J 7/25 - Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
Combined coating of a projection screen, comprising light-absorbing coating and reflective coating. The light-absorbing coating comprises 28-32 parts by weight of acrylate, 28-32 parts by weight of reactive diluent, 1-3 parts by weight of photoinitiator, 1-3 parts by weight of black pigment, 20-28 parts by weight of solvent, and 1-5 parts by weight of promoter. The reflective coating comprises 28-32 parts by weight of acrylate, 28-32 parts by weight of reactive diluent, 1-3 parts by weight of photoinitiator, 18-23 parts by weight of aluminum silver powder, 26-32 parts by weight of solvent and 1-5 parts by weight of promoter.
C09D 4/00 - Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond
C09D 175/14 - Polyurethanes having carbon-to-carbon unsaturated bonds
C09D 167/06 - Unsaturated polyesters having carbon-to-carbon unsaturation
C09D 171/00 - Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
C09D 163/10 - Epoxy resins modified by unsaturated compounds
C09D 133/04 - Homopolymers or copolymers of esters
61.
PROJECTION DEVICE, AND AUTOMATIC FOCUSING METHOD AND APPARATUS THEREFOR
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 using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
G02B 26/08 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating 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.
G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
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.
An LED display screen, comprising: an LED array, consisting of multiple LED light-emitting units and used for emitting a light; an optical diffusion film, provided at a light exit side of the LED array; a matrix shading frame, comprising multiple hollow shading gratings, the hollow shading gratings corresponding one-to-one to the LED light-emitting units; and a substrate, used for supporting the LED array and the matrix shading frame, where the light emitted by the LED light-emitting units, after running through the hollow shading gratings, is diffused to a viewer side via the optical diffusion film, and the LED light-emitting units emit the light towards the hollow shading gratings. The LED display screen prevents external ambient lights from being shone to optical surfaces of the LED light-emitting units and being reflected thereby, thus increasing the contrast of the LED display screen.
H01L 25/075 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
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.
A wavelength conversion device, a manufacturing method thereof, and a related illumination device. The wavelength conversion device comprises a fluorescent powder layer (110) that is successively stacked, a diffuse reflection layer (120), and a high-thermal-conductivity substrate (130). The diffuse reflection layer (120) comprises white scattered particles for scattering the incident light; the high-thermal-conductivity substrate (130) is one of an aluminum nitride substrate, a silicon nitride substrate, a silicon carbide substrate, a boron nitride substrate, and a beryllium oxide substrate. The wavelength conversion device has good reflectivity and thermal stability.
A light source device and a projection display system are provided. The light source device includes a first light source configured to emit first light, a wavelength conversion unit having at least one region, a second light source configured to emit second light, and a light combining element. The at least one region is configured to receive the first light and be excited to generate excited light. The light combining element is configured to converge excited light emitted from the wavelength conversion device and the second light.
G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
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
77.
LIGHT REFLECTING MATERIAL, REFLECTING LAYER AND PREPARATION METHOD THEREFOR
A light reflecting material, a reflecting layer and a preparation method therefor; the light reflecting material comprises glass powder particles (1), diffuser particles, ultrafine nano particles and an organic carrier; the particle size of the glass powder particles (1) is ≤5 μm, the particle size of the diffuser particles is 0.1 μm to 0.2 μm, and the particle size of the ultra-fine nano particles is 0.01 μm to 0.05 μm. The glass powder particles (1), diffuser particles and ultra-fine nano particles the particle sizes of which decrease progressively in sequence by one order of magnitude are used as the raw materials of the reflecting layer, without deceasing the adhesion between the reflecting layer and a substrate, the surface area within the reflecting layer that may cause reflection or refraction is increased to obtain better reflectivity.
A projection screen and a processing method therefor, wherein the projection screen comprises, in sequence from the incident side of projection light, a diffusion layer, a microlens array and a substrate. The inner side of the substrate is provided with a Fresnel microstructure, and part of the surface of the Fresnel microstructure is provided with a reflecting layer while the remaining part of the surface is a light absorbing layer. The microlens array is used for focusing the projection light on the reflecting layer. The reflecting layer is used for reflecting projection light back to the field of view of viewers. Ambient light is mostly absorbed by the light absorbing layer. The settings of the structure and dimension of the microlens array enable the projection light to be only incident onto the reflecting layer of the Fresnel microstructure and the ambient light to be mostly absorbed by the light absorbing layer.
A projection screen and a projection system. The projection screen includes a reflection layer and a light absorption layer for absorbing light which are sequentially arranged from an incident side of projection light; the reflection layer comprises multiple microstructure units; each microstructure unit comprises a first plane and a second plane which are opposite to each other at an angle in a first direction as well as a third plane and a fourth plane which are opposite to each other at an angle in a second direction.
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).
A laser light source (300), a wavelength conversion light source, a light combining light source, and a projection system. The laser light source comprises a laser element array, a focusing optical element (33), a collimation optical element (34), an integrator rod (36) for receiving and homogenizing a secondary laser beam array (382), an angular distribution control element (35) disposed on the light path between the laser element array and the integrator rod (36) for enlarging the divergence angle of the laser beam array (382) in the direction of the short axis of the light distribution, such that the rate between the divergence angle of each of the secondary laser beam that enters the integrator rod (36) in the direction of the short axis of the light distribution and the divergence angle in the direction of the long axis is greater than or equal to 0.7.
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.
A display device includes a control device configured to divide a display period of each frame of an image to be displayed into a first time period and a second time period; and send a light source control signal and a modulation signal corresponding to each pixel in the image to be displayed, according to original image data of each frame of the image to be displayed; a light source system configured to emit light source light according to the light source control signal, the light source light including first light and second light; and a light modulation device configured to modulate the first light according to the modulation signal to generate first image light of the image to be displayed, and modulate the second light according to the modulation signal to generate second image light of the image to be displayed.
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
H04N 9/31 - Projection devices for colour picture display
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.
G02B 27/14 - Beam splitting or combining systems operating by reflection only
G02B 27/28 - Optical systems or apparatus not provided for by any of the groups , for polarising
G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
93.
COLOUR WHEEL ASSEMBLY, LIGHT SOURCE SYSTEM, AND PROJECTION DEVICE
A colour wheel assembly (4), a light source system provided with same, and a projection device, a boron nitride coating being arranged on the side of the colour wheel assembly corresponding to a red fluorescent area (301) and the other side being provided with glass powder, and the two sides of a non-red fluorescent area both being provided with a glass powder coating layer. By means of arranging boron nitride material in a position corresponding to a red fluorescent area, as the boron nitride material has good thermal conductivity relative to the glass powder and the crystal structure of the boron nitride is a layered structure, having the effect of effectively blocking light and thereby further reducing the excitation light incident on the red fluorescent powder, attenuation of the red fluorescence under the direct excitation of strong excitation light can be effectively prevented; thus, there is no need to specially adjust the strength of the excitation light rays on the red fluorescent powder, satisfying the excitation of different fluorescent powders whilst keeping the same excitation light circuit, and effectively reducing the problem of the thermal quenching of the red fluorescent powder, such that the system effects are good, the service life is prolonged, and production costs are effectively reduced.
G02B 26/00 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating
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 display apparatus and a display system are provided. The display apparatus includes: a narrow-spectrum light source configured to emit narrow-spectrum light in elliptical distribution; a reflection device including a reflection surface for reflecting the narrow-spectrum light to obtain to-be-modulated light; and a light modulation device configured to modulate the to-be-modulated light to obtain image light of an to-be-modulated image. The light modulation device includes a modulation surface configured to receive the to-be-modulated light, the modulating surface is at a preset angle to an optical axis of the to-be-modulated light such that the to-be-modulated light forms a circle light spot on the modulating surface. The narrow-spectrum light complying with the elliptical distribution is incident onto the light modulation device to form a circle light spot, thereby helping the light modulation device to emit image light in circular angular distribution, improving light effect and achieving better image display quality.
H04N 9/31 - Projection devices for colour picture display
G02B 26/08 - Optical devices or arrangements using movable or deformable optical elements for controlling the intensity, colour, phase, polarisation or direction of light, e.g. switching, gating or modulating for controlling the direction of light
Disclosed is an LED display screen, including an LED array including LED light emitting units and arranged on a substrate, a diffusion film arranged at a light-exiting side of the LED array, and a matrix light-shielding frame arranged between the LED array and the diffusion film. A hollow grid array including hollow grids is included. The hollow grids correspond one-to-one to the LED light emitting units and a projection of each hollow grid on the substrate surrounds a corresponding one of the plurality of LED light emitting units. Light emitted from the LED array can pass through a projection region of the matrix light-shielding frame on the diffusion film and exiting therefrom.
H01L 25/075 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
A system and method for dynamically adjusting a color gamut of a display system, and a display system are provided. The display system includes a light source system and an imaging system. The light source system includes an excitation light source and a narrow-spectrum primary-light source. The imaging system includes a spatial light modulation device and the system for dynamically adjusting the color gamut of the display system. The excitation light source emits excitation light which is processed to output at least one broad-spectrum primary light. The narrow-spectrum primary light source outputs at least one narrow-spectrum primary light. The narrow-spectrum primary light and the wide-spectrum primary light are combined and then output to the imaging system. The brightness of light emitted by the excitation light source and the narrow-spectrum primary light source is adjusted. Therefore, the efficiency is improved and the costs are reduced while enhancing the color gamut.
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.
A projection screen and a projection system using the projection screen. The projection screen includes a microstructure layer and a light absorbing layer sequentially stacked from the side where a projected light is introduced. The microstructure layer includes multiple microstructure units. Each microstructure unit includes one reflective surface and one lens surface opposite the reflective surface; moreover, the reflective surface is provided at a position matching the focus of the lens surface. The projection screen and the projection system can resist ambient light and have a high gain and a high contrast.
