Abstract: The present disclosure is directed to systems and methods of reducing display image power consumption while maintaining image quality on display devices having a plurality of display power modes. Each display power mode has associated therewith a defined baseline value (K1,BASELINE) first relationship. A display image includes a baseline percentage under-boosted pixels (Xi,BASELINE). Using the first relationship value (K1,BASELINE) and the pixel percentage (Xi,BASELINE), a baseline second relationship value is determined (K0,BASELINE). The value associated with the second relationship is adjusted to a first plurality of values. At each value, the value associated with the pixel percentage is adjusted to each of a second plurality of values. At each combination of second relationship value and pixel percentage, a respective first relationship value is determined. A first relationship value, second relationship value are selected to provide a reduced power consumption while maintaining image quality.

Abstract: The present application discloses a backlight module for a display apparatus. The backlight module for a display apparatus includes a light guide plate; and a light transmittance control layer on the light guide plate configured to receive light from the light guide plate and modulate light intensity of the light from the light guide plate. The light transmittance control layer includes a light transmittance control material having a variable light transmissivity. Light transmittance in a plurality of regions of the light transmittance control layer is individually controllable.

Abstract: A backlight is configured by a power supply switching circuit configured to switch a supply destination of a power source voltage for LED driving among a plurality of blocks, a plurality of power source lines which are provided in one-to-one correspondence with the plurality of blocks and are each connected to an upstream end of each of LED units included in a corresponding block, an LED drive circuit including the same number of turn-on control switches, which are for controlling whether to supply a current to LEDs, as LED units included in each block, and one or more discharge control circuits provided for each block. The discharge control circuit lowers a voltage level at the upstream end of each of LED snits included in a corresponding block after an end of a period in which the power source voltage is supplied to the corresponding block.

Abstract: A backlight module, a display device and a driving method thereof are provided. The backlight module includes: a micro control circuit, a selection control circuit, a backlight source including a primary viewing region and a subsidiary viewing region, and a backlight driver chip; the micro control circuit is configured to output a selection signal to the selection control circuit and output a control signal to the backlight driver chip after a scanning of a display sub-region corresponding to the primary viewing region or the subsidiary viewing region is completed; the selection control circuit is configured to select the light-emitting components within the primary viewing region or the subsidiary viewing region according to the selection signal; and the backlight driver chip is configured to supply a drive current to the light-emitting components within the primary viewing region or the subsidiary viewing region that is selected according to the control signal.

Abstract: A display apparatus of the present disclosure includes: a light source section that outputs a light beam of a plurality of predetermined colors; an image data processing section that generates a sub-frame image of a single color by dividing a unit frame into a plurality of sub-frames, on the basis of an input image signal, and generates a sub-frame image of a mixed color based on the image signals of at least two colors; a display device that modulates the light beam based on the sub-frame images generated by the image data processing section; and a light source control section that causes the light source section to output the light beam of the color corresponding to the sub-frame image of the single color, in a selected period, and causes the light source section to output the light beams of the at least two colors sequentially.

Abstract: An image forming apparatus includes a print engine to form a page image on a printing sheet, a sheet conveyance unit to convey the printing sheet to the print engine in a non-stop conveyance mode, a video board to supply image data of the page image to the print engine, and a controller board to execute predetermined image processing to generate the image data and transfer the image data to the video board. The video board transmits a horizontal synchronization signal to the controller board. The controller board transfers the image data to the video board line by line in synchronization with the horizontal synchronization signal. The video board adjusts a cycle of the horizontal synchronization signal in accordance with an image width of the page image to satisfy a print productivity condition set correspondingly to a size of the printing sheet.

Abstract: Innovations for signaling state of a decoded picture buffer (“DPB”) and reference picture lists (“RPLs”). In example implementations, rather than rely on internal state of a decoder to manage and update DPB and RPLs, state information about the DPB and RPLs is explicitly signaled. This permits a decoder to determine which pictures are expected to be available for reference from the signaled state information. For example, an encoder determines state information that identifies which pictures are available for use as reference pictures (optionally considering feedback information from a decoder about which pictures are available). The encoder sets syntax elements that represent the state information. In doing so, the encoder sets identifying information for a long-term reference picture (“LTRP”), where the identifying information is a value of picture order count least significant bits for the LTRB. The encoder then outputs the syntax elements as part of a bitstream.

Abstract: An image processing circuit includes a memory, a gamma converter which converts a first image data signal of a frame to a current image data signal thereof corresponding to first or second gamma types based on a spatial distribution pattern, a compression circuit which separates the current image data signal into first and second gamma signals corresponding to the first and second gamma types and compresses the first and second gamma signals to first and second compression gamma signals to store the first and second compression gamma signals, a decompression circuit which output a previous image data signal of a previous frame by decompressing the first and second compression gamma signals and combines first and second decompression gamma signals, and a gamma correction circuit which performs a gamma adjustment based on current and previous image data signals to output a second image data signal.

Abstract: An image processing apparatus comprises a receiver (201) for receiving an image signal comprising an encoded image. Another receiver (1701) receives a data signal from a display (107) where the data signal comprises a data field that comprises a display dynamic range indication of the display (107). The display dynamic range indication comprises at least one luminance specification for the display. A dynamic range processor (203) is arranged to generate an output image by applying a dynamic range transform to the encoded image in response to the display dynamic range indication. An output (205) outputs an output image signal comprising the output image to the display. The transform may furthermore be performed in response to a target display reference indicative of a dynamic range of display for which the encoded image is encoded. The invention may be used to generate an improved High Dynamic Range (HDR) image from e.g. a Low Dynamic Range (LDR) image, or vice versa.

Abstract: An image display device includes an image data conversion unit that performs conversion processing of input image data and a display unit that displays a plurality of subframes, in one frame period. In the image data conversion unit, the conversion processing is performed in a manner that, for each pixel, a hue and a saturation of the input image data and a hue and a saturation of driving image data in an HSV color space are held to be respectively equal to each other, color components of the driving image data are set to have the same value when the saturation of the input image data is equal to the minimum saturation, and when the saturation of the input image data is equal to the maximum saturation, the color components of the input image data are multiplied by the same value, and then the input image data is compressed.

Abstract: A display apparatus and control method thereof are provided. The display apparatus including: a display configured to display an image; a backlight unit including a plurality of light sources configured to emit light to a screen of the display; an image processor configured to divide an input image into a plurality of blocks, identify target brightness for each block, and adjust a control value of each of the plurality of light sources based on priority of each of the plurality of light sources; and a driver configured to drive the plurality of light sources based on the control value. Thus, the duty for controlling the quality of light from the light source is identified considering the duty of the light source corresponding to an area of which previously identified priority is high, and thus dimming control is possible taking effects of light diffusion from adjacent neighboring light sources into account.

Abstract: A backlight module and a display device include a light guide plate and a point light source. The light guide plate includes a first part and a second part. The first part includes a first light incidence surface and a first light-emitting surface intersecting with the first light incidence surface. The second part includes a second light incidence surface and a second light-emitting surface intersecting with the second light incidence surface. The first light incidence surface intersects with the second light-emitting surface, the first light-emitting surface and the second light incidence surface are arranged oppositely, and both the first light-emitting surface and the second light-emitting surface include grating structures.

Abstract: A ubiquitous auto calibration device is provided, which includes microcontroller unit, flex bus, image receiver image processing module, and an image output unit. The microcontroller unit is provided for receiving the electronic signal and performing a self-adjusting process to the electronic signal. The flex bus is connected with the microcontroller unit, and is provided for transmitting the electronic signal to the image processing module after performing the self-adjusting process. The image receiver is provided for receiving the image signal from the image receiving interface. The image processing module is provided for performing an image calibration process to the image signal, so that the image signal can obey the color temperature standard, Gamma value, uniformity and color gamut standards when the panel outputs the image signal.

Abstract: A backlight adjustment method and a backlight adjustment system are provided. The backlight adjustment method includes a compensation phase. The compensation phase includes: controlling a light source to respectively emit light having a plurality of first illuminations; detecting a plurality of backlight parameters of a display device under the light having the plurality of first illuminations, and calculating a brightness compensation coefficient of the display device according to the plurality of backlight parameters; and adjusting a backlight coefficient of the display device according to the brightness compensation coefficient, so as to compensate for backlight brightness of the display device.

Abstract: There is provided a control apparatus that includes an estimating section calculating motion of an entire image on the basis of an image signal corresponding to an optical image of a living organism input from an imaging section of a medical observation apparatus, to estimate blurring of the entire image according to a result of the calculation, and a control section controlling an operation related to correction of the blurring of the entire image by controlling a coefficient for controlling an amount of correction of the blurring on the basis of a zoom magnification of the imaging section such that a degree of correction of the blurring increases consistently with the zoom magnification.

Abstract: A liquid crystal display device includes a reflective liquid crystal display panel and a panel driver configured to generate a driving voltage to drive the reflective liquid crystal display panel. The panel driver generates grayscale voltages having a voltage level between a first voltage and a second voltage based on a driving voltage-reflection ratio property in which a reflection ratio increases when the driving voltage increases to the first voltage and the reflection ratio decreases when the driving voltage increases from the first voltage to the second voltage.

Abstract: Example implementations relate to inactive state backlight operation. In some examples, a system may include a display. The display may include a liquid-crystal display (LCD) panel and a backlight to illuminate the LCD panel. The system may include a computing device comprising instructions executable to disable the LCD panel from displaying a live image while the display is in an inactive state. The system may include a computing device comprising instructions executable to reduce an electrical current supplied to the backlight while the display is in the inactive state from a first amount of electrical current associated with the active state to a second amount of electrical current to cause the backlight to reach an operating condition within a targeted length of time from reentering the active state.

Abstract: In one embodiment, a dual modulator display systems and methods for rendering target image data upon the dual modulator display system are disclosed where the display system receives target image data, possible HDR image data and first calculates display control signals and then calculates backlight control signals from the display control signals. This order of calculating display signals and then backlight control signals later as a function of the display systems may tend to reduce clipping artifacts. In other embodiments, it is possible to split the input target HDR image data into a base layer and a detail layer, wherein the base layer is the low spatial resolution image data that may be utilized as for backlight illumination data. The detail layer is higher spatial resolution image data that may be utilized for display control data.

Abstract: The present invention relates to a light emitting device and achieves either desirable color reproduction or improved image quality of a moving image according to the usage of an electronic device. The electronic device includes a first light emitting device and a second light emitting device having color reproducibility lower than that of the first light emitting device and having a response speed faster than that of the first light emitting device, and a control device includes a light emission control section configured to control light emission of the first light emitting device and light emission of the second light emitting device according to a usage of the electronic device such that a relation between luminance of the first light emitting device and luminance of the second light emitting device satisfies a predetermined condition.

Abstract: An electronic device includes a circuit board including at least one electronic component, a housing accommodating the circuit board, an emissivity control layer disposed in an upper portion of the circuit board and transmitting radiant heat generated by the electronic component, and a temperature controller controlling an amount of the radiant heat transmitted to the housing by adjusting the emissivity of the emissivity control layer. The temperature controller may adjust the emissivity of the emissivity control layer to a first range value, when the electronic device is in an idle state, not performing a foreground operation, and may adjust the emissivity of the emissivity control layer to a second range value, lower than the first range value, when the electronic device is in a busy state, performing the foreground operation.

Abstract: An electronic apparatus includes: a display; a light sensor located on an opposite side of a display surface of the display, and detects intensity of ambient light; and a control unit, in a first state in which luminous intensity of the display is not less than a first threshold, in the case where the intensity of ambient light detected by the light sensor is less than predetermined intensity of light, outputs, to the display, a signal to reduce the luminous intensity of the display to a second state that is not more than a second threshold that is less than the first threshold, and in the second state, outputs a signal to detect the intensity of ambient light to the light sensor.

Abstract: An improved multi-die LED lighting apparatus for use with a lens that facilitates light dispersion while minimizing color banding and maintaining the light distribution intent of the design of the lens. The individual LED die are dithered, both rotationally and spatially relative to neighboring LED dies to minimize color banding of the LED lighting apparatus. The result is an reduction in color banding while seeking to retain the original light dispersion intent of the lens.

Abstract: A display may have display layers that form an array of pixels. The array of pixels may be illuminated using a backlight unit. The backlight unit may include multiple strings of light-emitting diodes (LEDs). The multiple LED strings may be controlled by one or more backlight driver integrated circuits (ICs). In a multi-driver IC architecture, an enable signal may be used to set a desired phase delay between the multiple ICs. One or more of the LED strings may exhibit a short fault. Depending on the number of faulty LED strings, the backlight unit can selectively throttle the maximum brightness of the display. The LED strings may receive an output voltage from a DC/DC converter and may be driven using a current driver. The DC/DC converter may be controlled by a headroom feedforward control circuit to ensure sufficient headroom for the current driver while suppressing acoustic noise.

Abstract: Provided are a high dynamic range (HDR) image capturing device, which is capable of capturing an HDR image optimized in various situations, and a control method therefor.

Abstract: An illumination unit according to the present disclosure includes a plurality of first light-emission blocks, a plurality of second light-emission blocks, and a light-emission controller. The first light-emission blocks each include a plurality of first light-emitting devices arranged in a first direction. The second light-emission blocks are partially overlapped with the respective first light-emission blocks, and each include a plurality of second light-emitting devices arranged in a second direction different from the first direction. The light-emission controller performs light-emission control of the first light-emitting devices for each of the first light-emission blocks, and performs the light-emission control of the second light-emitting devices for each of the second light-emission blocks.

Abstract: A display apparatus includes a display panel, a gate driver, a data driver, and an emission driver. The display panel includes a pixel. The pixel includes a switching element of a first type and a switching element of a second type different from the first type. The gate driver is configured to output a gate signal to the display panel. The data driver is configured to output a data voltage to the display panel. The emission driver is configured to output an emission signal. The emission signal comprises a length of an emission off duration of a writing frame in which data is written to the pixel and a length of an emission off duration of a holding frame in which the data written to the pixel is maintained in a low frequency driving mode. The length of the emission off duration of the holding frame is different from the length of the emission off duration of the writing frame in the low frequency driving mode.

Abstract: An electronic device may have components that experience performance variations as the device changes orientation relative to a user. Changes in the orientation of the device relative to the user can be monitored using a motion sensor. A camera may be used to periodically capture images of a user's eyes. By processing the images to produce accurate orientation information reflecting the position of the user's eyes relative to the device, the orientation of the device tracked by the motion sensor can be periodically updated. The components may include audio components such as microphones and speakers and may include a display with an array of pixels for displaying images. Control circuitry in the electronic device may modify pixel values for the pixels in the array to compensate for angle-of-view-dependent pixel appearance variations based on based on the orientation information from the motion sensor and the camera.

Abstract: An image sensor includes an insulating pattern disposed on a semiconductor substrate and having an opening, a color filter disposed within the opening of the insulating pattern, a capping insulating layer disposed on the color filter, a first electrode disposed on the capping insulating layer and having a portion overlapping with the color filter, a separation structure surrounding a side surface of the first electrode, and a photoelectric layer disposed on the first electrode. The separation structure includes a first insulating layer and a second insulating layer formed of different material.

Abstract: A display device is provided in embodiments of the disclosure relating to the field of display technology, the display device including: a liquid crystal display panel; and an organic electroluminescent display panel provided opposite to the liquid crystal display panel and configured to function as a backlight source for the liquid crystal display panel; the liquid crystal display panel has a display region defined therein, and comprises a plurality of pixel units arranged in an array and located in the display region, each of the plurality of pixel units comprising a plurality of sub-pixel units; the organic electroluminescent display panel has a light-emitting region defined therein and opposite to the display region, and comprises a plurality of light-emitting units arranged in an array and located in the light-emitting region, each of the plurality of light-emitting units comprising a plurality of light-emitting sub-units; and an area of each of the plurality of sub-pixel units is smaller than an area of

Abstract: Vision sensor systems and methods detect banding and flicker. The method includes receiving camera data and identifying a light source location in a frame of camera data and assigning a luminance measure at the light source as a signal reference. A region of interest (ROI) is then associated with the light source. The frame is incremented, and then a signal to noise ratio (SNR) at the light source is calculated. A number, N of frames may be processed to identify banding when it is present, and to identify flicker when it is present. Responsive to identifying banding or identifying flicker, a response for a display system or for a machine vision system is generated.

Abstract: A surface light source device and system for monitoring uniformity of brightness of the device are disclosed, the device includes a light source unit; a light guide plate, and at least one light uniformity plate. The light guide plate includes a light incident surface and a light emitting surface, the light incident surface is disposed in a light emitting direction of the light source unit; and the light incident surface is disposed in a light emitting direction of the light source unit. The at least one light uniformity plate comprises a light receiving surface facing the light emitting surface, the light receiving surface is defined with a plurality of zones, and each zone is provided with a photosensitive element which senses and measures the brightness of light. A method of operating the monitoring system is also disclosed.

Abstract: A method is implemented at an electronic device for visually indicating a voice processing state. The electronic device includes an array of visual indicators and one or more microphones. The electronic device collects via the one or more microphones audio inputs from an environment in proximity to the electronic device and initializes processing of the audio inputs. A state of the processing is then determined from among a plurality of predefined voice processing states, and for each of the visual indicators, a respective predetermined illumination specification is determined in association with the determined voice processing state. In accordance with the identified illumination specifications of the visual indicators, the electronic device synchronizes illumination of the array of visual indicators to provide a visual pattern indicating the determined voice processing state. The visual pattern is displayed on the surface of the electronic device and includes one or more discrete illumination elements.

Abstract: An active optical machine-readable tag that is addressable and readable within a line-of-sight of a reader device equipped with a camera, at substantially large distances. The active optical tag and the camera-based reader may use a method of asynchronous communication reducing the flicker associated with the low-frequency optical carrier to a level hardly noticeable by people. The method of transmitting data may include determining length of a repetitive time period not longer than time resolution of a human eye, emitting a first sequence of light pulses within the time period, the light pulses including pulses of complementary colors and pulses of different levels of luminosity; and determining the order of the colors and levels of luminosity of the first sequence of light pulses emitted within the time period to represent a symbol, and to achieve perceived chromaticity and luminosity that is substantially constant to a human eye.

Abstract: A light emitting device includes a resin package having a rectangular shape in a top view and two short-side lateral surfaces and two long-side lateral surfaces. The two short-side lateral surfaces include a first external surface and a second external surface located on an opposite side from the first external surface. The two long-side lateral surfaces include a third external surface and a fourth external lateral surface located on an opposite side from the third external lateral surface. The lead is not exposed on the third external lateral surface nor the fourth external lateral surface. The first lead is exposed at the first external lateral surface and the second external lateral surface, respectively flush with the resin member at the first external lateral surface and the second external lateral surface. The second lead is exposed at the second external lateral surface, flush with the resin part at the second external lateral surface.

Abstract: An image display method includes acquiring a data clock signal, generating a backlight driving signal according to the data clock signal, and displaying an image according to at least the data clock signal and the backlight driving signal by a display system. The data clock signal includes a first data square wave and a second data square wave. The first data square wave and the second data square wave are periodically transmitted. Each of the first data square wave and the second data square wave has a data period. The backlight driving signal includes a first backlight square wave and a second backlight square wave. The first backlight square wave and the second backlight square wave are periodically transmitted. Each of the first backlight square wave and the second backlight square wave has a backlight period. The data period is greater than the backlight period.

Abstract: A system and method for the selective illumination of a display backlight, the system including a plurality of light sources configured in an array, a plurality of switches electrically connected to the plurality of light sources, and at least one substrate configured to receive the plurality of light sources and the plurality of switches, wherein the plurality of switches are configured to operate at least a portion of the plurality of light sources based upon a control signal, and wherein the at least one substrate includes a power supply connection.

Abstract: A connected board includes a first circuit board including a first ground and a second circuit board including a second ground. The first circuit board includes a rigid portion and a flexible portion. The rigid portion includes a section of a conductive layer having flexibility and hard substrates prepared from an insulator and having rigidity. The section of the conductive layer is bonded to the hard substrates and held by the hard substrates. The flexible portion includes a section of the conductive layer extending from the rigid portion and a soft substrate covering the section. The soft substrate includes a connection hole for connecting the second circuit board to the first circuit board. The second circuit board is mounted to the flexible portion in the connection hole. The second ground is directly connected to the conductive layer of the first circuit board.

Abstract: A method for encoding video data into a video bitstream using a video capture device having a brightness range limited output determines capture conditions for the capture device, the capture conditions including an ambient capture light level and a measured light level of captured video data. The method adjusts a brightness adaptation model using at least the measured light level and the ambient capture light level, the brightness adaption model defining a temporally variable peak luminance for a viewer of video captured using the capture device, and then determines a tone map such that where the measured light level exceeds a determined maximum light level the tone map is modified to reduce brightness, the maximum light level is determined using the brightness adaptation model. The captured video data is then encoded into the video bitstream using the determined tone map.

Abstract: The invention provides a display panel, including a color filter substrate and a thin film transistor array substrate disposed oppositely, and a liquid crystal layer filled between the color filter substrate and the thin film transistor array substrate, wherein the thin film transistor array substrate includes a display area, a non-display area, and a plurality of photo sensors are disposed in the display area; the color filter substrate is formed with a plurality of light transmissive passages; the thin film transistor array substrate is disposed with a plurality of sub-pixels; and the photo sensor is configured for detecting position information corresponding to an external photoelectric signal when receiving the external photoelectric signal. The display panel is provided with a plurality of photo sensors, when the incident laser light is irradiated onto the photo sensor, the photo sensor can be triggered to work, and the laser projection position is determined.

Abstract: The present invention relates to a light emitting device and achieves either a high luminance with low power consumption or an increased image quality of a moving image according to the usage of an electronic device. The electronic device includes a first light emitting device and a second light emitting device, and a control device includes a light emission control section configured to control light emission of the first light emitting device and light emission of the second light emitting device according to a usage of the electronic device such that a relation between luminance of the first light emitting device and luminance of the second light emitting device satisfies a predetermined condition.

Abstract: This application provides a display apparatus and a driving method therefor. The display apparatus includes: a storage module, configured to provide display data; a timing controller, configured to: read the display data, convert the display data to image data, and output the image data and a control signal; a brightness adjusting module, configured to adjust a working state of the brightness adjusting module according to the control signal; and a display module, configured to receive the image data output by the timing controller and present a corresponding image, where after finishing configuring the image data of the display module and receiving a feedback signal sent by the display module, the timing controller controls the brightness adjusting module to be turned on, and the brightness adjusting module is connected to the timing controller by using a spring and a probe of a fan-out area.

Abstract: The present disclosure provides a method for adjusting display image contrast, which includes the following operations: in response to receiving an image signal, acquiring an image to be displayed and metadata according to the image signal, and calculating a signal amplitude corresponding to each pixel of the image to be displayed; generating a histogram showing a distribution of the signal amplitude according to each of the signal amplitudes, and acquiring display information and a backlight adjustment parameter of the image to be displayed according to the histogram; generating a signal adjustment function according to the display information, the backlight adjustment parameter, and the metadata, and adjusting the signal amplitude of each of the pixels according to the signal adjustment function to adjust a contrast of the image to be displayed. The present disclosure further provides a display and a readable storage medium. The cost of improving the display image contrast of the present application is low.

Abstract: An electronic system including a display device, an image sensor, a face detection engine, an eye detection engine and an eye protection engine is provided. The image sensor captures an image. The face detection engine recognizes a user face in the image. The eye detection engine recognizes user eyes in the image. The eye protection engine turns off the display device when the user eyes are recognized in the image but the user face is not recognized in the image.

Abstract: A display device includes a display unit including a plurality of pixels, each of the pixels including a plurality of subpixels, and a display area having a corner of a non-right angular shape, and a signal controller controlling the display unit to display an image based on an input image signal and a control signal and changing a gray value of the image signal based on different light transmittance values of subpixels included in a first pixel, among the plurality of pixels, positioned at the corner of the non-right angular shape if the image signal corresponds to the first pixel at the corner of the non-right angular shape.

Abstract: A display device includes a display panel having a display surface, display drivers arranged on and along a peripheral portion of the display panel, a wiring substrate located on a side of the display panel opposite from the display surface and having a long shape extending in an arrangement direction of the display drivers, first flexible wiring substrates electrically connecting the display drivers to the wiring substrate, a second flexible wiring substrate extending from the wiring substrate toward an outer periphery of the display panel, and a control board connected to an extended end portion of the second flexible wiring substrate and configured to control the display drivers and disposed not to overlap the display panel in a thickness direction of the display panel and having a dimension in the thickness direction of the display panel larger than that of the wiring substrate.

Abstract: A multi-screen display device includes a plurality of display screens and a prism-structured optical element disposed between two adjacent display screens. The prism-structured optical element includes a substrate and a plurality of prisms arranged in a predetermined direction on the substrate. The substrate includes a first region and a second region adjacent to each other, and the lengths of the first and second regions in the predetermined direction are respectively La and Lb, and La?Lb. The prism includes a plurality of first and second prisms in the first and second regions respectively. Each first and second prism has internal angles ?a1, ?a2 and internal angles ?b1 and ?b2 adjacent to the substrate. The inner angle ?a1 is between the inner angle ?a2 and the second region, and ?a1<?a2. The internal angle ?b1 is between the internal angle ?b2 and the first region, and ?b1<?b2.

Abstract: A control method and apparatus for a display screen. The method comprises: obtaining target light quantity data collected by a light sensor during a process of wearing a terminal device by a first user (101); updating a first light quantity data historical value file by using the target light quantity data to obtain a second light quantity data historical value file (102); determining a light quantity data threshold by using the second light quantity data historical value file (103); controlling a display state of the display screen of the terminal device according to the light quantity data threshold (104). The present disclosure can conveniently adjust the light quantity data threshold, so as to control the display state of the display screen of the terminal device accurately.

Abstract: In some embodiments, a keyboard may comprise internal light sources to backlight keycaps. In addition, the keyboard may provide one or more unobstructed paths for light from an external light source located beneath the keyboard to reach the keycaps. When the keyboard is placed onto the external light source, the keycaps within the keyboard may be illuminated from the external light source. When the keyboard is placed on a display device of a dual-display computing device, one display device may be used to present text and images to a user while the other display device provides backlighting for the keyboard. Software may manage the image shown on the display device located under the keyboard device to alter the appearance of the keycaps. The keyboard battery life may be extended by disabling key backlights within the keyboard when the dual-display computing device provide the backlight.

Abstract: A lighting device for illuminating an illuminated body with light includes a light source, a light guide plate, and an optical sheet. The light guide plate is configured to guide light from the light source. The optical sheet is configured to impart an optical effect to light exiting from the light guide plate. The optical sheet includes at least one communicating groove that communicates from an outer peripheral end face of the optical sheet to a surface opposed to the illuminated body.

Abstract: Systems, methods, and computer readable media to improve the operation of display systems are disclosed. In general, techniques are disclosed for dynamically adjusting backlight elements based on image content. More particularly, a backlight element's intensity may be targeted for boosting (i.e., increasing) based on content of the backlight element's corresponding image region, where after a check may be made to determine if the proposed increase is likely to risk generation of a halo. If the proposed intensity increase would risk a halo, the backlight element's proposed intensity may be dimmed. Repeating the boost/dim cycle in an iterative fashion permits an image to be displayed with brighter highlights and deeper blacks.