Abstract: A wavelength conversion device includes a base plate, at least one wavelength conversion material layer and a balance ring. The base plate has a geometric center, the wavelength conversion material layer is disposed on the base plate, and the balance ring is disposed on the base plate and rotates about a rotation shaft. The balance ring has a balancing part, and the balancing part includes at least one of the following structures: (1) a protrusion formed by a part of an outer periphery of the balance ring protruding in a direction away from the rotation shaft; (2) a recess formed by a part of the outer periphery of the balance ring caving in a direction towards the rotation shaft.

Abstract: At a first time point, a light amount adjusting unit stores the brightness of illumination light as a first brightness, and stores the light intensity of each color component of the illumination light as a first light intensity. A gain adjusting unit sets a gain value of at least one of the individual color components to be a maximum value, and stores the gain value as a first gain value. At a second time point after the first time point, the light amount adjusting unit calculates a ratio between a second light intensity and the first light intensity. The gain adjusting unit corrects the gain values based on the ratio between the second light intensity and the first light intensity.

Abstract: A display switching device according to one or more embodiments may include a lens array including an array of a plurality of lenses and a display unit. Light from each of the plurality of light source positions transmits through a different position on the display unit and is focused by a corresponding lens. A transmittance on the display unit through which the light transmits differs depending on a position on the display unit. The transmittance at a position of a plurality of positions on the display unit is a transmittance of one of three or more types.

Abstract: Optical center is determined on a column-by-column and row-by-row basis by identifying brightest pixels in respective columns and rows. The brightest pixels in each column are identified and a line is fit to those pixels. Similarly, brightest pixels in each row are identified and a second line is fit to those pixels. The intersection of the two lines is the optical center.

Abstract: A projection apparatus, an illumination apparatus thereof, and a light source driving method thereof are provided. A control module converts a bit control signal into first light source timing signals, converts the first light source timing signals into second light source timing signals according to a lookup table, generates a driving current corresponding to each light source according to the lookup table, outputs second light source driving signals corresponding to the light sources according to the second light source timing signals. The lookup table includes a driving current ratio corresponding to the light sources. A driving module drives the light sources according to the second light source driving signals and the driving current for the light sources to have overlapping light-emitting timings.

Abstract: A light-emission device includes at least one emission module comprising: a luminescent crystal known as a concentrator crystal with at least six faces which are parallel in pairs, including a first and a second face, known as lateral faces, perpendicular to a direction x and separated by a distance corresponding to a horizontal dimension of the concentrator in the direction x; a first mirror, which is configured such as to cover the first lateral face at least partly, defining a surface area covered by the first mirror, and at least one surface area (SFS1) which is not covered by the first mirror defining an associated output face; a second mirror, which is configured such as to cover at least 95% of the second lateral face; a brightness triggering element, which is designed to generate emission of brightness radiation (LF) in the luminescent crystal; a ratio R between the non-covered surface area (SFS1) and a surface area (SL) of the first lateral face being determined such that rays of the brightness radia

Abstract: A collimated image projector that receives light from an illuminating source and propagates the light along a light path towards an exit pupil, the projector comprising: a first homogeneous dielectric polarizing beam splitter (PBS) deployed along the light path and defining a first transition from a first light path segment to a second light path segment; a second homogeneous dielectric PBS deployed parallel to the first PBS along the second light path segment and defining a second transition from the second light path segment to a third light path segment; and collimating optics deployed along the light path after the second PBS so as to direct a collimated image towards the exit pupil; wherein the first and second PBSs are deployed such that either the first and second transitions are both performed via transmission, or the first and second transitions are both performed via reflection.

Abstract: The present invention relates to a driving method for flicker suppression of a display panel and a driving circuit thereof. The driving circuit includes a source driving circuit and a common voltage generating circuit. The driving method includes driving the source driving circuit to generate at least one first source signal and at least one second source signal, the first source signal corresponds to at least one first pixel on a first scanning line; the second source signal corresponds to at least one second pixel on a second scanning line. The common voltage generating circuit generates at least one common voltage. While driving the first pixel and the second pixel to display the same gray scale image, the first source signal is not equal to the second source signal, or a first common voltage and a second common voltage generated by the common voltage generating circuit are different.

Abstract: There is provided with an image-processing apparatus for indicating a range, which is displayed by a device or a system comprising a display area for displaying an image, within an input image. A first obtaining unit obtains information that represents a display form of the device or the system comprising the display area. A second obtaining unit obtains input image data representing the input image. An identification unit identifies the range, which is displayed in the display area, within the input image based on the input image data and the information. An output unit outputs information that represents the identified range. A shape of the identified range depends on the display area that corresponds to at least a curved screen or a plurality of flat screens.

Abstract: An optical component according to the present disclosure includes a substrate containing sapphire. The substrate is provided with a functional portion and a heat dissipating portion. An inclination of a main face of the substrate is 75° or greater with respect to a c-plane of the sapphire. The functional portion and the heat dissipating portion are provided so that an angle formed by a c-axis of the sapphire and a line segment connecting the functional portion and the heat dissipating portion is 15° or less.

Abstract: Polarizer stacks are described. More particularly, polarizer stacks that include an absorbing polarizer and multiple reflective polarizers, including at least one collimating reflective polarizer are described. Such polarizer stacks are capable of emitted light that is both collimated and color neutral. Backlights incorporating such polarizer stacks are also described.

Abstract: A device may include an electronic display to display an image frame based on image data. The electronic display may include an illuminator that generates light, multiple light regulators that control emission of the light pixel locations on the electronic display based on bitplane data, and driving circuitry that applies an operating electrical stimulus to the illuminator during an emission period of the image frame and a reference electrical stimulus to the illuminator during an off period of the image frame. While the reference electrical stimulus is applied the bitplane data may be indicative of off bitplane. Additionally, the electronic display may include measurement circuitry that measures a response characteristic of the illuminator in response to the reference electrical stimulus and generates temperature data indicative of the temperature of the illuminator based on the response characteristic.

Abstract: A lighting device which outputs output light includes: a light source; and an optical member which includes at least one of reflection wavelength selectivity or transmission wavelength selectivity depending on an incidence angle ? of incident light from the light source, wherein the incident light is incident on the optical member at a plurality of different incidence angles ?, the incident light is converted into outgoing light through the optical member, the outgoing light includes reflected light reflected by the optical member and transmitted light transmitted through the optical member, the output light is light based on the outgoing light, and chromaticity of the output light continuously changes on a surface irradiated by the output light.

Abstract: A laser projection display method includes: in an output period for a laser source to output a primary color beam, controlling the laser source to be turned off according to a set rotation switching period, the rotation switching period indicating a moment when the laser source is turned off and a moment when the laser source is turned on; in the rotation switching period, driving micro-mirrors in a digital micro-mirror device to perform rotation switching between an ON state and an OFF state until the moment when the laser source is turned on indicated by the rotation switching period is reached; and when the moment when the laser source is turned on is reached, controlling the laser source to be turned on, and driving the micro-mirrors to rotate to project and display an image to be displayed until a next rotation switching period is reached.

Abstract: A method and an apparatus pertaining to recycling and reuse of unwanted light in additive manufacturing can multiplex multiple beams of light including at least one or more beams of light from one or more light sources. The multiple beams of light may be reshaped and blended to provide a first beam of light. A spatial polarization pattern may be applied on the first beam of light to provide a second beam of light. Polarization states of the second beam of light may be split to reflect a third beam of light, which may be reshaped into a fourth beam of light. The fourth beam of light may be introduced as one of the multiple beams of light to result in a fifth beam of light.

Abstract: Provided is a head-up display device capable of reducing the divergence angle of display light which has passed a cross point. A head-up display device comprises: a light source that emits light beams; a liquid crystal panel that emits display light beams upon reception of the light beams from the light source; a first mirror that reflects the display light beams from the liquid crystal panel and causes the reflected display light beams to cross at a cross point in a crossing direction; a second mirror that reflects the display light beams reflected on the first mirror and passed through the cross point; and a second lenticular lens that converges the light beams from the light source and causes the display light beams to reach the first mirror in the converged state.

Abstract: Aspects of the present disclosure can receive a hardware Vsync signal from a display, generate a hardware timestamp signal based on the hardware Vsync signal, determine an error for a pulse in the hardware timestamp signal, determine whether the error for the pulse is over a threshold, synchronize a software Vsync signal based on the hardware timestamp signal, wherein the pulse of the hardware timestamp signal is ignored in synchronization based on whether the error is above the threshold, and control rendering and transmission of a frame to the display based on the synchronized software Vsync signal.

Abstract: Examples described herein generally relate to a system and method for projecting content in a retail environment. The system and method may include an image projector for projecting content on a surface of the retail environment. The system and method may also include a security pedestal comprising the image projector. The system and method may also include receiving at the image projector a first signal indicating a first content to be projected. The system and method may also include receiving at the image projector a second signal indicating a second content to be projected after the first content.

Abstract: A system control portion generates corrected image data by performing reduction processing of reducing input image data input into a display portion at a first reduction rate and image shifting processing of shifting positions of R image data and B image data of a specific color component included in reduced image data obtained by the reduction processing. The system control portion projects a corrected image based on the corrected image data to a screen by inputting the corrected image data into the display portion.

Abstract: A non-transitory computer-readable-medium storing instructions that, when executed by a processor of an image projector, cause the image projector to perform operations including receiving a first image data, determining a thermal state of the image projector based at least in part on a content of the first image data, generating a second image data based on the first image data and the thermal state; emitting light in response to the second image data, and projecting an image onto a screen based on the emitted light, wherein the first image data corresponds to a frame of a video, and the second image data corresponds to the frame of the video.

Abstract: A display device may include a substrate. A first light emitting element is disposed on the substrate. A second light emitting element is disposed on the substrate and is positioned adjacent to the first light emitting element. A first encapsulation layer is disposed on the first light emitting element and the second light emitting element. A light path control layer is disposed on the first encapsulation layer. The light path control layer includes a first pattern overlapping the first light emitting element and having a first refractive index and a second pattern overlapping the second light emitting element and having a second refractive index that is greater than the first refractive index.

Abstract: The invention provides a light generating system (1000) comprising: —a plurality of k light sources (10) configured to provide light source light (11), wherein k is a natural number of at least 5, wherein the light sources (10) are configured in an array (15), wherein the light sources (10) have inter-light source distances (d1); —an elongated luminescent body (100) having a length (L), the elongated luminescent body comprising one or more side faces (140), the elongated luminescent body (100) comprising a radiation input face (111) and a radiation exit window (112), wherein the radiation input face (111) is configured in a light receiving relationship with the plurality of light sources (10), wherein the elongated luminescent body (100) comprises luminescent material (120) configured to convert at least part of light source light (11) into luminescent material light (8), wherein the radiation exit window (112) has an angle (?) unequal to 0° and unequal to 180° with the radiation input face (111); —a body hol

Abstract: An apparatus includes an acquisition unit configured to acquire first polarization information that includes a polarized light component and an angle component using luminance values of input images obtained by imaging light of a plurality of colors in a plurality of different polarization states, a correction unit configured to acquire corrected polarization information obtained by replacing at least part of the first polarization information in a specific area with second polarization information obtained using a luminance value of a specific color among the plurality of colors in the specific area in the input images, and a generation unit configured to generate an output image using the corrected polarization information. The polarized light component is a luminance component that changes according to polarization angles. The angle component is a polarization angle that maximizes the luminance value.

Abstract: A projection system and a projection image adjustment method thereof are provided. The projection image adjustment method is applicable to a processing device connected to multiple projectors, a display, and an input device, and includes the following steps. Arrangement information between the multiple projectors is obtained. Multiple adjustable areas corresponding to a projection image of each projector are simultaneously displayed on the display and the multiple adjustable areas are simultaneously displayed on projection images of the multiple projectors according to the arrangement information. A parameter setting interface corresponding to a first adjustable area among the multiple adjustable areas is displayed on the display. The first adjustable area corresponds to a first projector among the multiple projectors.

Abstract: A projection device and its display method are provided. The projection device includes a light source module, a control device, a light valve module, and a lens module. The light source module provides an illumination beam and includes first and second light sources respectively emitting first and second sub-color beams and a driving circuit driving the first and second light sources. The illumination beam includes the first and second sub-color beams. The light valve module converts the illumination beam to an image beam. The lens module projects the image beam. The projection device is configured to have multiple color gamut modes. In at least partial time of a first time slot, the control device controls the driving circuit to simultaneously drive the first and second light sources.

Abstract: A display apparatus capable of providing an expanded viewing window includes a light guide plate including an input coupler and an output coupler; and an image providing apparatus facing the input coupler to provide an image to the input coupler. The input coupler may include a plurality of sub input couplers configured to propagate the image provided from the image providing apparatus at different angles in the light guide plate.

Abstract: Optical center is determined on a column-by-column and row-by-row basis by identifying brightest pixels in respective columns and rows. The brightest pixels in each column are identified and a line is fit to those pixels. Similarly, brightest pixels in each row are identified and a second line is fit to those pixels. The intersection of the two lines is the optical center.

Abstract: A projection apparatus including an illumination system and a projection imaging system is provided. The illumination system is adapted to emit an illumination beam, and the illumination system includes a light source module and a light shaping module. The light source module is adapted to emit at least one beam. The light shaping module is disposed on the transmission path of the at least one beam. The at least one beam forms an illumination beam after passing through the light shaping module, and the illumination beam has a light imaging matching angle. The light shaping module includes at least one first lens element. The at least one first lens element is disposed on the transmission path of the at least one beam. The projection imaging system is disposed on a transmission path of the illumination beam. The projection apparatus is suitable for eliminating stray light and crosstalk of images.

Abstract: The disclosure relates to a projection device and a color gamut switching method thereof. The projection device includes a light source, a wavelength conversion element, an optical engine module, a projection lens module, and a filter element. The light source is configured to emit a first light beam. The wavelength conversion element is disposed on a transmission path of the first light beam, and the wavelength conversion element is configured to convert the first light beam into a second light beam. The optical engine module is disposed on a transmission path of the second light beam from the wavelength conversion element. The optical engine module is configured to convert the second light beam to form an image beam. The projection lens module is disposed on a transmission path of the image beam from the optical engine module. The filter element is removably disposed on the transmission path of the second light beam or the image beam.

Abstract: A light source module includes phase retardation layer, first light source, second light source, first Polarization Beam Splitter (PBS) layer, second PBS layer, first redirector and second redirector. The phase retardation layer, the first light source, the second light source, the first PBS layer, the second PBS layer, the first redirector and the second redirector are symmetrically disposed relative to symmetry axis. The first light source and the second light source each emit polarized light having first linear polarization direction and polarized light having second linear polarization direction. The phase retardation layer converts the first linear polarization direction of polarized light into the second linear polarization direction. The PBS layers allow polarized light having the first linear polarization direction to travel through but reflect polarized light having the second linear polarization direction. The redirector reflects polarized light having the second linear polarization direction.

Abstract: An illumination system, including a housing, a first light source, a second light source, a polarization beam splitting element, and a heat dissipation module, is provided. The first light source and the second light source are disposed in the housing and are respectively configured to provide a first beam to the polarization beam splitting element along a first optical axis and a second beam to the polarization beam splitting element along a second optical axis. A portion of an inner surface of the housing has a light absorption region. The light absorption region is configured to absorb the first beam that is not reflected by the polarization beam splitting element and the second beam that does not penetrate the polarization beam splitting element, so as to convert them into heat. The heat generated by the light absorption region is dissipated by the heat dissipation module.

Abstract: A light-emitting device includes a board on which light sources are disposed; a sectioning member including a ridge part having segments that configures a grid pattern, and a wall part surrounding the light sources, and extending from the ridge part toward the board such that an interval between two adjacent portions of the wall part joining along the ridge part becomes wider toward the board; and one or more integrated circuits configured to drive the light sources. The sectioning member and the integrated circuits are disposed on the same side of the board as the light sources. A space is defined between the back surface of the sectioning member and the board. One of the one or more integrated circuits is square or rectangular, and overlaps an intersection of segments of the ridge part, such that the sides are oblique with respect to the ridge part.

Abstract: There is provided a control device, a control method, a control program, and a control system that are capable of presenting a VR experience with a high sense of immersion using a tiling display. The control device acquires arrangement of displays in a tiling display in which a plurality of displays is tiled, acquires a light-emitting characteristic of each of the displays, tracks a position and a line-of-sight direction of a user with respect to the tiling display, and adjusts a luminance value of each of the displays on the basis of the light-emitting characteristic and a tracking result by the tracking such that brightness of the displays viewed from the user becomes continuous through a boundary of the displays.

Abstract: The present invention discloses an optical system including a light combination unit, a first LED panel and a second LED panel. The first LED panel is located at one side of the light combination unit and configured to emit a first light. The second LED panel is located at another side of the light combination unit and configured to emit a second light. The first LED panel is a monochrome LED panel, and the second LED panel is a double color LED panel. The first LED panel and the second LED panel respectively emit the first light and the second light into the light combination unit, and the light combination unit combines and collimates the first light and the second light along one direction.

Abstract: Methods and systems are provided that provide multiple simultaneous beams at differing angles used in scanning a light sheet for single plane illumination and applications thereof. The use of multiple beams reduces shadows that would otherwise stretch across the entire illumination sheet. The multiple beams may be created with a spatial light modulator as part of the illumination system.

Abstract: Described are various embodiments of a digital display device for use by a user having reduced visual acuity. In one embodiment, the device comprises: a digital display medium comprising an array of pixels and operable to render a pixelated image accordingly; a light field shaping layer defined by an array of light field shaping elements and disposed relative to said digital display so to align each of said light field shaping elements with a corresponding set of said pixels to shape a light field emanating therefrom and thereby at least partially govern a projection thereof from said display medium toward the user; and a hardware processor operable on pixel data for the image such that said processed image is rendered to at least partially compensate for the user's reduced visual acuity.

Abstract: A polarization-based generator of duality modulated electromagnetic radiation, and a related method, by which the duality ratio of the energy-based irradiance and wave-based intensity may be selectively altered. A linearly polarized coherent radiation beam is incident on a polarizer configuration. Relative angular alignment of the beam's polarization and the polarizer configuration selectively provides output beams ranging from totally energy-depleted radiation to significantly energy-enriched radiation.

Abstract: A forward projecting condensing and collimating optical platform enables the ability to more effectively utilize the light generated from a Lambertian light source. The optical system can effectively utilize light emitted from a 120-degree source viewing angle over a substantially large extended field of view. The optical system can project a high intensity light in a smaller packaging envelope. The optical design can be used for generation of hi-Intensity spot beams, fog lamps, head lamp low beams, head lamps, hi beams, a driving beam, and the like, while operating at a lower power input to equivalent optical systems.

Abstract: Provided is an illumination system for providing an illumination beam. The illumination system includes at least one light source, a movable reflective element, a lens element, and a light uniformizing element. The light source is configured to emit at least one beam. The beam is reflected by the movable reflective element, and then passes through the lens element and the light uniformizing element to form an illumination beam. An optical effective area of the beam on the lens element is configured to be larger than that of the beam on the movable reflective element by motion of the movable reflective element. The optical effective area is an area of a union of each beam that irradiates the lens element or the movable reflective element at different times. A projection device is also provided. The illumination system and projection device provide a uniformized illumination beam and improve the projection effect.

Abstract: A method of manufacturing a light emitting element includes: providing a first light emitting part and a second light emitting part, the first light emitting part comprising a first base member and a first semiconductor layered body, the second light emitting part comprising a second base member and a second semiconductor layered body; bonding the first and second light emitting parts to each other such that the first base member and the second base member are disposed between the first semiconductor layered body and the second semiconductor layered body; disposing a light reflecting member to cover the bonded first and second light emitting parts; removing a portion of the light reflecting member to expose surfaces of the first and second base members; and disposing a wavelength conversion member on the exposed surface of the first base member and the exposed surface of the second base member.

Abstract: A light guiding unit includes a light guiding member that light enters and an angle converter that the light from the light guiding member enters. The light guiding member has a side surface and a light exiting end surface which intersects the side surface and via which the light exits. The angle converter includes a light incident section on which the light from the light guiding member is incident, a light exiting section via which the light incident on the angle converter exits, and a reflection section that reflects the light incident via the light incident section toward the light exiting section. The refractive index of the interior of the angle converter is greater than the refractive index of air. The refractive index of the interior of the light guiding member is greater than the refractive index of the interior of the angle converter.

Abstract: A novel projection system includes a light source, a phase modulator, an amplitude modulator, and a controller having temporal lightfield simulation capabilities. The phase modulator spatially modulates a lightfield from the light source to generate an intermediate image on the amplitude modulator. The amplitude modulator spatially modulates the intermediate image to form a final image. The controller models the phase state of the phase modulator during transitions between phase modulator frames and generates lightfield simulations of the intermediate image during the transition. The controller utilizes the lightfield simulations to generate and provide sets of amplitude drive values to the amplitude modulator at a faster rate than that at which the phase modulator is capable of switching.

Abstract: A multi-mode scanning device for scanning an original includes a non-transparent element, a first light source, a second light source and an optical module. The first light source outputs visible light to irradiate the non-transparent element and the original to generate first light and second light, respectively. The second light source outputs invisible light to irradiate a combination of the non-transparent element and the original to generate third light and fourth light. The optical module receives the first light, the second light, the third light and the fourth light and generates sensing signals representative of visible light information and invisible light information of the original. The original is disposed between the non-transparent element and the optical module. The first light source and the optical module are disposed on a same side of the non-transparent element.

Abstract: A lamp projecting a starry sky is provided. The lamp projecting the starry sky includes at least one beam generator, a reflecting member with uneven and irregular reflecting surface, a first motor, and at least one first lens. The first motor is connected to the reflecting member through a connecting shaft, the reflecting member is driven to rotate when the first motor rotates, a light beam generated by the beam generator irradiates onto a first side of the reflecting member along an incident light path, and a light beam emitted from the reflecting member forms a moving and layering nebula projection after passing through the at least one first lens. In the lamp, after passing from the reflecting member, the light beam is magnified by the lens, so that the generated starry sky will not be too bright and dazzling, which effectively enhances the layering sense of the starry sky.

Abstract: A system and method for displaying image data comprise receiving 2D video data, generating, from the video data, a first plurality of intensity values of virtual primaries of a first virtual color gamut and a second plurality intensity values of a second virtual color gamut, the first plurality of intensity values being below a luminance threshold and approximating a predefined color gamut and the second plurality of intensity values being above the luminance threshold, converting the first plurality of intensity values into a third plurality of intensity values of predefined primaries of a first projection head of a display system and the second plurality of intensity values into a fourth plurality of intensity values of predefined primaries of a second projection head of the display system, and dynamically adjusting pixel levels of spatial modulators of the display system based on the third plurality and the fourth plurality of intensity values.

Abstract: An optical device comprises a shared phase modulation mask configured to impart a first phase modulation to light of a first wavelength, and imparts a second phase modulation to light of a second wavelength, an irradiation optical system configured to cause the light of the first wavelength and the light of the second wavelength to enter the same incident region in the phase modulation mask, and a light collecting optical system configured to collect the light of the first phase-modulated first wavelength and the light of the second phase-modulated second wavelength to form an image corresponding to a point spread function.

Abstract: An image display apparatus according to an embodiment of the present technology includes a polarizer, a polarization conversion element, and a ¼ wave plate. The polarizer causes to transmit linearly polarized light having a predetermined polarization direction. The polarization conversion element converts a polarization state of the linearly polarized light transmitted through the polarizer and emits the light as light in a non-polarized state. The ¼ wave plate is arranged on an optical path of the light in the non-polarized state emitted from the polarization conversion element.

Abstract: A waveguide grating. The waveguide grating includes a rib composed of a first material. A first portion of the waveguide has a first layer on the rib, the first layer being composed of a second material; and a second layer on the first layer, the second layer being composed of a third material, the third material having a higher index of refraction than the first material.

Abstract: The projection device includes a projector housing, wherein a light source mechanism is provided on a right side of an internal bottom end of the projector housing, a lens set is arranged on a right side of the projector housing, two guide slots are vertically arranged on an inner wall on a left side of the projector housing, a lifting support is arranged on the two guide slots, the lifting support is fitted to the two guide slots via a lifting device, a first reflector is obliquely arranged on the lifting support, a second reflector is fixedly and obliquely arranged under the lifting support, and a direction of an inclination of the second reflector is opposite to a direction of an inclination of the first reflector.

Abstract: An optical device comprising a stack of the following layers: a capping layer; a layer of light absorber material; and a reflective layer, wherein the refractive index of the capping layer is at least 1.6.