Abstract: A projection system can include a housing. A controller can receive a video signal and, in response to the video signal, produce a light-emitting diode (LED) array-controlling signal and a modulation panel-controlling signal. An LED array disposed in the housing can include LEDs that are configured to produce LED light having corresponding time-varying intensities in response to the LED array-controlling signal. A modulation panel disposed in the housing can have a plurality of pixels that are configured to modulate corresponding portions of the LED light in response to the modulation panel-controlling signal to form intensity-modulated light. A lens disposed in or on the housing can project the intensity-modulated light out of the housing to form a video image that corresponds to the video signal. The video image can be located away from the housing.

Abstract: A mobile device contains an integrated structure (e.g., a semiconductor structure) that includes an LED matrix with one or more LED arrays and sensors on at least opposing edges of the LED matrix. Each LED array has LEDs that are separated by non-emitting areas and the LEDs are independently driven to provide light. The light is converted to white light using a phosphor disposed on the LEDs. The sensors detect ambient light or flicker. The semiconductor structure is attached to a semiconductor driver via conductive pillars and underfill between the conductive pillars. The driver is coupled to a PCB. The PCB is electrically coupled to the semiconductor structure via PCB contacts and LED contacts to drive the LEDs dependent on the ambient light.

Abstract: First and second LED arrays can include respective first and second pluralities of light-emitting areas that are separated by respective first and second boundaries. The first and second boundaries can be arranged in slightly different patterns. At least one lens can collimate light from the first LED array to form first illumination, collimate light from the second LED array to form second illumination, and illuminate the scene with the first and second illuminations. The first boundaries can form first dark bands in the first illumination. The second boundaries can form second dark bands in the second illumination, which can be slightly offset from the first dark bands at the scene.

Abstract: An illumination system can include a dual junction light-emitting diode (LED) array including first and second junctions that extend in a plane. The first junction can emit first light from a plurality of first light-emitting areas that are separated by first boundaries. The second junction can be disposed on the first junction such that the first light passes through the second junction. The second junction can emit second light from a plurality of second light-emitting areas. The second light-emitting areas can be separated by second boundaries that correspond in a one-to-one correspondence to the first boundaries. The second boundaries can be offset in the plane from the corresponding first boundaries. The offset can help reduce or eliminate dark bands in the combined first and second light, which could be present if the second boundaries were not offset from the first boundaries.

Abstract: A camera can capture an image of a scene during an exposure duration of the camera. An illumination system for the camera can include a light-emitting diode (LED) array. The LED array can include a plurality of LEDs that can produce light during the exposure duration of the camera. The LED array can include one or more non-emitting areas located between adjacent LEDs in the LED array. A lens can direct the light toward the scene as illumination. The illumination can include one or more dark bands corresponding to the one or more non-emitting areas of the LED array, optionally surrounding the LEDs in the LED array. An actuator can translate at least one of the LED array or the lens during the exposure duration of the camera so as to blur the one or more dark bands in the illumination in the image of the scene.

Abstract: A sensor can sense time-varying ambient light that is present in a scene to produce an ambient light signal. A processor can determine an ambient light frequency and an ambient light phase of the ambient light signal. Light-emitting diodes (LEDs) of an LED array can be electrically powered with pulse-width modulation (PWM) electrical signals having a same amplitude to produce illumination. Each LED can illuminate a respective region of the scene. Each PWM electrical signal can have a respective duty cycle that corresponds to a specified illumination intensity in a respective region of the scene. The PWM electrical signals can have a same PWM frequency that is an integral multiple of the ambient light frequency. Each PWM electrical signal can have a respective PWM phase that is synchronized to the ambient light phase. A lens can direct the illumination toward the scene to illuminate the scene.

Abstract: A structure and method of micro-LEDs are described. The micro-LEDs have a GaN semiconductor structure containing a multi-quantum well active region configured to emit light of a visible wavelength range and a structure to increase specular reflection of ambient light by proving scattering at one or more interfaces of the micro-LEDs. The interfaces include the air-encapsulant interface, semiconductor-encapsulant interface, or semiconductor-contact interface.

Abstract: Multi-color flash with image post-processing that uses a camera device with a multi-color flash and implements post-processing to generate images is described. In one aspect, the multi-color flash with image post-processing may be implemented by a controller configured to control a camera and flashes of at least two different colors. The controller may be configured to cause the camera to acquire a first image of a scene while the scene is being illuminated with the first flash but not the second flash, then cause the camera to acquire a second image of the scene while the scene is being illuminated with the second flash but not the first flash, and generate a final image of the scene in post-processing based on a combination of the first image and the second image.

Abstract: An apparatus includes a neuromorphic vision unit, an array, and a controller. The neuromorphic vision unit includes a plurality of pixels to photoelectrically produce data based on light received from an object in a scene. The array includes a plurality of light sources. The controller controls the plurality of light sources at one of a plurality of granularities, at least in part based on the data.

Abstract: A driver system controls a plurality of light emitting diodes (LEDs). The driver system includes a first driver to provide an LED current to each of the plurality of LEDs. The first driver includes a current mirror for the LED current provided to the plurality of LEDs. The driver system also includes a second driver to modulate the LED current provided to the plurality of LEDs.

Abstract: A lighting device comprises a light-emitting module with light-emitting elements, wherein the light-emitting elements are arranged adjacent to each other and are configured to emit light towards a light-emitting side. The light-emitting module is configured such that the light-emitting elements can be addressed partially independently of each other, such that some may be brought into a switched-on state while others are brought into a switched-off state. A top layer is disposed on the light-emitting module at the light-emitting side. Further comprising a switching material capable of a reversible change in transmittance for the light emitted by changing to a higher transmittance in regions where the top layer situated on light-emitting elements in the switched-on state or to a lower transmittance in regions of the top layer situated in the switched-off state. The invention further refers to methods for producing and operating a lighting device and using a lighting device.

Abstract: Multi-color flash with image post-processing that uses a camera device with a multi-color flash and implements post-processing to generate images is described. In one aspect, the multi-color flash with image post-processing may be implemented by a controller configured to control a camera and flashes of at least two different colors. The controller may be configured to cause the camera to acquire a first image of a scene while the scene is being illuminated with the first flash but not the second flash, then cause the camera to acquire a second image of the scene while the scene is being illuminated with the second flash but not the first flash, and generate a final image of the scene in post-processing based on a combination of the first image and the second image.

Abstract: A lighting device comprises a light-emitting module with light-emitting elements, wherein the light-emitting elements are arranged adjacent to each other and are configured to emit light towards a light-emitting side. The light-emitting module is configured such that the light-emitting elements can be addressed partially independently of each other, such that some may be brought into a switched-on state while others are brought into a switched-off state. A top layer is disposed on the light-emitting module at the light-emitting side. Further comprising a switching material capable of a reversible change in transmittance for the light emitted by changing to a higher transmittance in regions where the top layer situated on light-emitting elements in the switched-on state or to a lower transmittance in regions of the top layer situated in the switched-off state. The invention further refers to methods for producing and operating a lighting device and using a lighting device.

Abstract: A light-emitting apparatus can include a reflective cavity that can reflect visible light within the reflective cavity. The reflective cavity can allow the reflected visible light to exit the reflective cavity only at one or more specified emission locations. A visible light-emitting diode can emit visible light into the reflective cavity. An infrared light-emitting diode can emit infrared light into the reflective cavity. A lens can angularly redirect infrared light and visible light that exit the cavity through the one or more emission locations. The reflective cavity can be formed by surfaces at least partially coated with a coating that is reflective for visible light. The coated surfaces can include a circuit board that supports the light-emitting diodes, an incident surface of the lens, and an extension portion of the lens that extends from a flange to the incident surface of the lens.

Abstract: The invention describes an infrared imaging assembly (1) for capturing an infrared image (M0, M1) of a scene (S), comprising an infrared-sensitive image sensor (14); an irradiator (10) comprising an array of individually addressable infrared-emitting LEDs, wherein each infrared-emitting LED is arranged to illuminate a scene region (S1, . . . , S9); a driver (11) configured to actuate the infrared irradiator (10) by applying a switching pulse train (T1, . . . , T9) to each infrared-emitting LED; an image analysis module (13) configured to analyse a preliminary infrared image (M0) to determine the required exposure levels (130) for each of a plurality of image regions (R1, . . . , R9); and a pulse train adjusting unit (12) configured to adjust the duration (L1, . . . , L9) of a switching pulse train (T1, . . . , T9) according to the required exposure levels (130).

Abstract: Multi-color flash with image post-processing that uses a camera device with a multi-color flash and implements post-processing to generate images is described. In one aspect, the multi-color flash with image post-processing may be implemented by a controller configured to control a camera and flashes of at least two different colors. The controller may be configured to cause the camera to acquire a first image of a scene while the scene is being illuminated with the first flash but not the second flash, then cause the camera to acquire a second image of the scene while the scene is being illuminated with the second flash but not the first flash, and generate a final image of the scene in post-processing based on a combination of the first image and the second image.

Abstract: The invention describes an infrared imaging assembly (1) for capturing an infrared image (M0, M1) of a scene (S), comprising an infrared-sensitive image sensor (14); an irradiator (10) comprising an array of individually addressable infrared-emitting LEDs, wherein each infrared-emitting LED is arranged to illuminate a scene region (S1, . . . , S9); a driver (11) configured to actuate the infrared irradiator (10) by applying a switching pulse train (T1, . . . , T9) to each infrared-emitting LED; an image analysis module (13) configured to analyse a preliminary infrared image (M0) to determine the required exposure levels (130) for each of a plurality of image regions (R1, . . . , R9); and a pulse train adjusting unit (12) configured to adjust the duration (L1, . . . , L9) of a switching pulse train (T1, . . . , T9) according to the required exposure levels (130).

Abstract: In a projection display system, a polarizing beamsplitter can split an unpolarized light beam into a first internal beam and a second internal beam, which can have polarization states that are orthogonal. A polarization rotator, such as a half-wave plate, can rotate a plane of polarization of at least one of the first internal beam or the second internal beam. A beam aligner, such as a second polarizing beamsplitter, can change a propagation direction of at least one of the first internal beam or the second internal beam. The polarization rotator and the beam aligner each can adjust at least one of the first or second internal beams such that the first internal beam forms a first exiting beam and the second internal beam forms a second exiting beam. The first exiting beam and the second exiting beam can be adjacent and parallel and have parallel polarization states.

Abstract: A backlight apparatus can include a light emitting element configured to emit visible light. The backlight apparatus can include a polarizing device including a prism situated to receive the visible light and to polarize the visible light to generate polarized light. The backlight apparatus can include a light guide panel configured to receive the polarized light at an input surface facing the polarizing device and to distribute the polarized light to a major surface of the light guide panel facing a display screen.

Abstract: A method according to embodiments of the invention includes creating a three-dimensional profile of a scene, calculating a relative amount of light for each portion of the scene based on the three-dimensional profile, and activating a light source to provide a first amount of light to a first portion of the scene, and a second amount of light to a second portion of the scene. The first amount and the second amount are different. The first amount and the second amount are determined by calculating a relative amount of light for each portion of the scene.