A folded optical arrangement for use in a display, the display to transmit an image from an image plane to a user's eye, the arrangement providing a folded optical transmission path and comprising: a collimating element having a first optical element comprising a first plurality of optically powered surfaces; and a second optical element comprising at least one optically powered surfaces, the collimating element configured to receive light forming the image from an image source, and to collimate and output the light, wherein the first plurality of optically powered surfaces and the at least one optically powered surface of the second optical element are arranged to define a plurality of interfaces along the folded optical path and wherein a refractive index change at each interface is predetermined to control the direction of light passing through the or each interface, and wherein one surface of the first optical element and one surface of the second optical element are adjacent to one another and the adjacent surfaces have a dissimilar shape and each define an angle with a respective other surface of the relevant optical element at opposing ends of the adjacent surfaces and wherein the opposing angles are not equal.
Disclosed herein are regulated power supplies. The power source delivers power to a system load and includes battery units. The power source also includes power flow devices coupled to the battery units that are configured to provide power from the battery units to the system load. Each power flow device corresponds to a respective one of the battery units, and includes a one direction current flow device connected in series with a current regulator between the respective battery unit and the system load.
In an example, the eyewear includes an optical element, electronic components, and a support structure configured to support the optical element and the electronic components. The support structure defines a region for receiving at least a portion of a head of a user. The eyewear also includes a biometric sensor coupled to the electronic components and supported by the support structure. The biometric sensor is attached to the support structure and positioned to detect, in the region, a biometric signal representative of a biometric of the user for processing by the electronic components.
A waveguide is disclosed for use in an augmented reality or virtual reality display. The waveguide includes a plurality of optical structures exhibiting differences in refractive index from a surrounding waveguide medium. The optical structures are arranged in an array to provide at least two diffractive optical elements (H1, H2) overlaid on one another in the waveguide. Each of the two diffractive optical elements is configured to receive light from an input direction and couple it towards the other diffractive optical element which can then act as an output diffractive optical element, providing outcoupled orders towards a viewer. The optical structures have a shape, when viewed in the plane of the waveguide, comprising a plurality of substantially straight sides having respective normal vectors at different angles and this can effectively reduce the amount of light that is coupled out of the waveguide on first interaction with the optical structures.
Interactive computing systems and methods are provided which enable simple and effective interaction with a user device, which increases interest and improves user experience. The interactive system comprises a user device including a motion sensor, for receiving motion-based gestures through motion of the user device; and a controller, coupled to the motion sensor, configured to control one or more aspects of the system according to the motion-based gestures. Advantageously, the system enables single handed operation of the user device.
G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer
H04N 21/482 - End-user interface for program selection
H04N 21/60 - Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client; Communication details between server and client
H04N 21/637 - Control signals issued by the client directed to the server or network components
G06F 3/0346 - Pointing devices displaced or positioned by the user; Accessories therefor with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
In some embodiments, a computer implemented method of processing messages may include creating a gallery using messages received from user devices; scanning the messages to identify a selected message of messages; receiving, from an owner of the brand, a prioritization of the selected message; prioritizing, in response to the prioritization, the selected message in the gallery; and supplying the gallery to a user device for display to a user of the user device.
H04L 51/222 - Monitoring or handling of messages using geographical location information, e.g. messages transmitted or received in proximity of a certain spot or area
H04L 51/52 - User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail for supporting social networking services
In some embodiments, a computer implemented method of processing messages may include creating a gallery using messages received from user devices; scanning the messages to identify a selected message of messages; receiving, from an owner of the brand, a prioritization of the selected message; prioritizing, in response to the prioritization, the selected message in the gallery; and supplying the gallery to a user device for display to a user of the user device. Date Recue/Date Received 2022-05-16
H04L 51/222 - Monitoring or handling of messages using geographical location information, e.g. messages transmitted or received in proximity of a certain spot or area
An ephemeral gallery of ephemeral messages is provided. An ephemeral message comprising the media content such as photographic or video content is posted to the ephemeral gallery. The ephemeral message has an associated message duration parameter determining the duration for which the message is displayed on-screen during automated slide-show type viewing of the gallery, and has a gallery participation parameter indicating a time value for continued availability of the ephemeral message in the ephemeral gallery. The ephemeral gallery is eliminated from availability for viewing upon expiry of a gallery availability parameter. The gallery is in some embodiments eliminated at the expiry of a gallery timer or at the expiry of the gallery participation parameter of a last posted ephemeral message in the gallery, whichever is earliest.
H04L 51/42 - Mailbox-related aspects, e.g. synchronisation of mailboxes
H04L 51/52 - User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail for supporting social networking services
H04L 67/568 - Storing data temporarily at an intermediate stage, e.g. caching
An optical device is disclosed for expanding input light in two dimensions in an augmented reality display. The device comprises a waveguide (12) and three linear diffraction gratings H0, H1, H2. An incident beam from a projector illuminates an input grating H0 with polychromatic light, and the light is coupled into the waveguide (12). The other two gratings H1, H2 are overlaid on top of one another. Light can be diffracted by one grating H1 into a first diffracted order and towards the other grating H2 which can couple the light out of the waveguide (12) towards a viewer. In another arrangement the crossed gratings H1, H2 may be replaced by a photonic crystal (19) having a regular array of pillars (20) which create a number effective diffraction gratings.
A server including a processor configured to execute instructions for performing operations. The processor involves selecting a plurality of photograph filters based upon a geolocation of a client device on which an image is presented and an object depicted in the image, and supplying, to the client device, the plurality of photograph filters that were selected based upon the geolocation of the client device and the object depicted in the image. The plurality of photograph filters are configured to be independently alternatively selectable by a user to overlay the image. Each of the plurality of photograph filters is configured to overlay the image to augment the image. A first filter of the plurality of photograph filters that is configured to modify an entirety of the image is selected in response to a first user input. A second filter of the plurality of photograph filters that is configured to modify only a first particular feature of an object depicted in the image is selected in response to a second user input received after the first user input. The processor also involves routing a selected one of the plurality of photograph filters and a photograph corresponding to the image to another client device.
A server includes a photo filter module with instructions executed by a processor to identify when a client device captures a photograph. Photograph filters are selected based upon attributes of the client device and attributes of the photograph. The photograph filters are supplied to the client device.
A server includes a message thread module with instructions executed by a processor to maintain a message thread between a first user and a second user. Each entry of the message thread is deleted after a display period unless an indication regarding the entry is received during the display period.
An optical waveguide (30) is provided having at least first and second diffraction regions, the first diffraction region being arranged to diffract image -bearing light propagating along the waveguide so as to expand it in a first dimension and to turn the image -bearing light towards the second diffraction region, the second diffraction region being arranged to diffract the image- bearing light so as to expand ii in a second dimension and to release it from the waveguide as a visible image. The first diffraction region is formed by first diffraction grating (14) embedded within the waveguide, arranged to present a substantially similar profile to the image -bearing light when incident upon the grating from a given angle above or below the grating.
The present invention provides a projection display (10) for projecting a colour image to a viewer (12) overlaid on a real world scene viewed through the display. The display comprises an image generator (16) for generating image bearing chromatic light for injection into a waveguide assembly (28) at a first range of field angles (44) and a second range of field angles (46). The waveguide assembly comprises a first waveguide (30) having a first input diffraction region (32) arranged to couple image bearing chromatic light in the first range of field angles into the first waveguide to propagate by total internal reflection; and a second waveguide (40) having a second input diffraction region (42) arranged to couple image bearing chromatic light in the second range of field angles into the second waveguide to propagate by total internal reflection. The first and second waveguides have first and second output diffraction regions (48, 50) arranged to output image bearing chromatic light from the respective waveguides for projecting a colour image in the first and second range of field angles to a viewer overlaid on a real world scene viewed through the waveguide assembly.
A helmet or head-mounted apparatus has a visor or other curved optical element in front of at least one eye of a wearer, which element also is used as a waveguide. Image-bearing light is injected into the waveguide via an input diffractive element, and propagates through the visor to an output diffractive element which releases the light. The optical powers of the curved waveguide and the input and output diffractive elements are selected so that the released light is delivered as an image to the users eye.
The invention relates to a display device for displaying an image over a field of view. The device comprises: an optical arrangement for directing image bearing light from an image source so that the light has rays at a range of angles relative to an injection axis; and an optical waveguide having an input grating for diffracting into the waveguide said light over said range of angles such that all of the diffracted light is totally internally reflected within the waveguide and so that image bearing light output from the waveguide has a field of view corresponding to said range of angles, wherein the input grating is a surface relief grating having a profiled reflective surface and at least one layer of dielectric material conforming to the surface for diffracting light over said range of angles into the waveguide.
An optical waveguide comprising a body of material configured for the contained propagation of light therethrough, a surface relief grating configured to receive the propagating light and at least partially to diffract or reflect it out of the waveguide, and at least one layer of dielectric material of varying thickness having a first surface and a second surface which conforms to a profiled surface of the grating so that the grating exhibits a spatial variation in efficiency dependent on the varying thickness of the dielectric material.
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