Backlight Control Patents (Class 345/102)
  • Patent number: 11030946
    Abstract: Aspects of the disclosure provide an ambient brightness detection method, an electronic device, a detection apparatus, and a storage medium. The method can be applied to an electronic device including a display array and a light sensing component that is arranged on a back of the display array. The method can include that a detected brightness is obtained through the light sensing component in a display time slot of a target pixel portion covered by a projection in a plane where the display array is located, and a brightness scene is determined according to present display brightness of the display array. The method can also include that a calculation parameter for calculation of ambient brightness is determined according to the brightness scene, a display refresh rate of the display array, and the detected brightness, and the ambient brightness is determined according to the calculation parameter.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: June 8, 2021
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventor: Chaoxi Chen
  • Patent number: 11030964
    Abstract: An image display processing method for a display device, an image display processing device, a display device, and a non-volatile storage medium are provided. The display device includes a backlight unit and a display panel, the backlight unit includes a plurality of backlight blocks and is driven by a local dimming mode, and the image display processing method includes: obtaining initial backlight data of each of the plurality of backlight blocks corresponding to a display image; performing a peak driving process on the initial backlight data of each of the plurality of backlight blocks by a graphics processing unit to obtain adjusted backlight data of each of the plurality of backlight blocks; and providing the adjusted backlight data to the backlight unit by the graphics processing unit so that the display panel displays the display image.
    Type: Grant
    Filed: May 1, 2019
    Date of Patent: June 8, 2021
    Assignees: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Wenyu Li, Jinghua Miao, Yukun Sun, Xuefeng Wang, Zhifu Li, Bin Zhao, Xi Li, Lixin Wang, Qingwen Fan, Jianwen Suo, Yali Liu, Hao Zhang, Lili Chen, Zhihua Ji, Jinbao Peng, Ziqiang Guo, Xiurong Wang
  • Patent number: 11030962
    Abstract: A backlight unit and a display device are provided. The duty or the like of a light source driving signal is adjusted so that a frequency component causing flicker to be visible, among frequency components of luminance appearing in a driving period of low-speed driving mode. Flicker is prevented or reduced in the low-speed driving mode. The display device is driven in the low-speed driving mode to reduce power consumption. The display device is driven at a lower display driving frequency in the low-speed driving mode, thereby improving the efficiency thereof.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: June 8, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: SungYub Lee, YoungJoon Lee, SeungSeok Oh
  • Patent number: 11022833
    Abstract: In a liquid crystal device serving as an electro-optical device, a liquid crystal layer as an electro-optical element is disposed between a base material 10s as a first substrate and a base material 20s as a second substrate which are disposed to face each other via a photo-curable type seal material, the substrate 10s and the substrate 20s are transmissive and include a plurality of light-shielding patterns disposed at intervals in a seal region of the substrate 10s where the seal material is disposed, and on the substrate 10s, a semiconductor layer of a transistor included in a driving circuit for driving the electro-optical element is disposed to overlap, in plan view, with at least one of the plurality of light-shielding patterns.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: June 1, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shinsuke Fujikawa
  • Patent number: 11024236
    Abstract: A system and method for controlling the screen brightness of a display comprising calculating a brightness data which specifies a screen brightness level of a self-luminous display panel, determining, based on the brightness data, correction control points, calculating an output value from the input grayscale value with input-output characteristics specified by the correction control points.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: June 1, 2021
    Assignee: Synaptics Japan GK
    Inventors: Hirobumi Furihata, Kazutoshi Aogaki, Takashi Nose
  • Patent number: 11024212
    Abstract: A system, method and apparatus are set forth which adjusts one or more of the brightness, vibrancy and color shift of displayed content based upon the at least approximate age of the viewer. At a display (15) the user's age is at least approximated by accessing an established user data file (835, 837) containing age determining data and/or capturing a facial image (804) of the user and processing the same to determine at least the approximate age of the user. Based upon the age determination the brightness, vibrancy and/or color shift may be adjusted to account for the effects of the aging of the human eye. User overrides (900, 902, 904) may be provided for the user to alter or turn off the adjustments. Adjustment of the brightness, vibrancy and/or color shift may also take into account ambient light conditions.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: June 1, 2021
    Assignee: SG Gaming, Inc.
    Inventors: Martin S. Lyons, Scott T. Hilbert, Sean C. Martin
  • Patent number: 11024346
    Abstract: A semiconductor circuit includes a first circuit to apply an inverted voltage of a voltage at a first node to a second node, a second circuit to apply an inverted voltage of a voltage at the second node to the first node, a first transistor that includes a gate, a drain, and a source, and stores a threshold state, a second transistor that couples the first node to a first terminal by being turned on, a third transistor that couples a first predetermined node to the gate of the first transistor, and a driving section that controls operations of the second transistor and the third transistor, and applies a control voltage to a second terminal. The first terminal is one of the drain or the source of the first transistor. The second terminal is another of the drain or the source of the first transistor.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: June 1, 2021
    Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
    Inventor: Yasuo Kanda
  • Patent number: 11024240
    Abstract: Effective image correction processing for reducing flicker is executed according to characteristics of images, and an image to be displayed in a liquid crystal display apparatus is generated. Characteristic amount change rate data that is a change rate between a characteristic amount of a sample image and a characteristic amount of a sample image output to a liquid crystal display device is acquired in advance and stored in a storage unit. The correction parameter for reducing flicker is calculated on the basis of the characteristic amount of the image to be corrected and the characteristic amount change rate data of the sample images stored in the storage unit. The correction processing to which the calculated correction parameter has been applied is executed for the image to be corrected to generate a display image. As the characteristic amount, for example, the interframe luminance change amount, the interline luminance conversion amount, or the interframe motion vector is used.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: June 1, 2021
    Assignee: SONY CORPORATION
    Inventors: Yiwen Zhu, Kazunori Kamio, Takahiro Nagano
  • Patent number: 11025871
    Abstract: A driver for powering a pulsed light source of a scanning projector display is configured to provide a succession of powering electric pulses to the light source. Duration of the powering electric pulses is less than a pixel time interval during which a scanner of the projector display is directing the light beam to form a corresponding pixel of the image to be displayed. The amplitude of the powering electric pulses is proportionally higher, such that the light pulse has a pulse energy similar to the light energy provided by the light source when continuously driven through the pixel time interval. This enables the light source to be operated at a steeper portion of the electro-optical transfer curve, thereby improving the wall plug efficiency of the scanning projector display.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: June 1, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Ziv Magoz, James Laudolff, Daniel Guenther Greif, Scott Charles McEldowney
  • Patent number: 11018208
    Abstract: An image processing device includes a region divider configured to receive an image data, generate a convert data by converting the image data by pixel rows, and generate a region dividing information that divides the image data into a plurality of regions based on the convert data, a luminance detector configured to detect a region maximum luminance and a region minimum luminance of each of the regions based on the image data and the region dividing information, and a compensator configured to generate compensation image data that compensate a contrast of each of the regions based on the region dividing information, the region maximum luminance, and the region minimum luminance.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: May 25, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventor: Masatoshi Sonoda
  • Patent number: 11007418
    Abstract: A smart mirror can show live or recorded streaming video of an instructor performing a workout in a package that is attractive and unobtrusive enough to hang in a living room. The smart mirror includes a mirror surface with a fully reflecting section and a partially reflecting section. A display behind the partially reflecting section shows the video when the smart mirror is on and is almost invisible when the smart mirror is off. The smart mirror also has a speaker, a microphone, and a camera to enable a user to view the video content and interact with the instructor. The smart mirror may connect to the user's smart phone, a peripheral device (e.g., a Bluetooth speaker) to augment user experience, a biometric sensor to provide biometric data to assess user performance, and/or a network router to connect the smart mirror to a content provider, an instructor, and/or other users.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: May 18, 2021
    Assignee: Curiouser Products Inc.
    Inventor: Brynn Putnam
  • Patent number: 11011111
    Abstract: A display driving device comprising: a high supply voltage operation unit that generates an operating current under application of a high supply voltage so as to supply driving voltages to a display panel; a low supply voltage operation unit that operates under the application of a low supply voltage lower than the high supply voltage and controls the high supply voltage operation unit; and a reuse circuit that receives the operating current from the high supply voltage operation unit and supplies the operating current to a ground side via the low supply voltage operation unit so as to apply the low supply voltage to the low supply voltage operation unit.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: May 18, 2021
    Assignee: LAPIS SEMICONDUCTOR CO., LTD.
    Inventors: Hiroyoshi Ichikura, Hiroki Aizawa, Takeshi Nosaka
  • Patent number: 11011122
    Abstract: A liquid crystal display (LCD) that may include: a plurality of transistors groups forming a pixel array of said LCD, wherein the transistors groups are independently controllable; a plurality of backlight units, forming a backlight surface of said LCD, wherein the backlight units are independently controllable; a data refresh module configured to periodically refresh data at said groups of transistors, at a specified order, over a refresh cycle time; and a backlight control module configured to periodically dim the backlight units at said specified order over a backlight cycle time which is substantially shorter than the refresh cycle time.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: May 18, 2021
    Assignee: Elbit Systems Ltd.
    Inventors: Yoav Ophir, Gil Benesh
  • Patent number: 11010879
    Abstract: Embodiments of the disclosure provide a video image processing method and apparatus thereof, and a display device, relate to the field of image processing technology, and in particular, and can solve the problem in the existing video image processing methods that real-time processing of a video image cannot be achieved due to large computational complexity. The video image includes multiple frames of image, and the method includes: obtaining a brightness characterization parameter representing image brightness for a current frame of image; obtaining a ratio of a brightness value of each input pixel in the current frame of image to the brightness characterization parameter; and obtaining a product of the ratio and a numerical value (M+1), wherein M is a maximum possible pixel brightness value of the current frame of image, and taking the product as a brightness value of an output pixel of the current frame of image. The invention can achieve contrast enhancement of a video image.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: May 18, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Tianmin Rao
  • Patent number: 10997935
    Abstract: A display device including a first substrate, a color conversion layer on the first substrate and containing a wavelength conversion material, a first conductive polarizer on the color conversion layer, and a timing controller electrically connected to the first conductive polarizer. The timing controller may measure a resistance of the first conductive polarizer to generate a compensation signal based on the measured resistance.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: May 4, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae Woong Kang, Seung Hwan Park, Cheol Woo Park, Dong Gyu Lee, Yong Jun Jang, Young Soo Hwang
  • Patent number: 10989856
    Abstract: A fiber optic shelving system includes a shelf including a plurality of holes, a plurality of fiber optic filaments, each of the plurality of fiber optic filaments having a first end and a second end, and the first end being coupled to one of the plurality of holes, a first camera configured to capture an image of the terminal surfaces of the plurality of fiber optic filaments, and a second camera configured to capture an image of a side of one or more products on the shelf. The fiber optic shelving system identifies, among the plurality of holes, a set of holes that are blocked from light based on the captured image of terminal surfaces of the second ends of the plurality of fiber optic filaments, and determines a number of products on the shelf based on the identified set of holes blocked from light and the captured image of the side of one or more products on the shelf.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: April 27, 2021
    Assignee: SUNRISE R&D HOLDINGS, LLC
    Inventors: John Christopher Goss, Gregory Daniel Noble, Kevin Michael Roa, Douglas Steven Meiser
  • Patent number: 10991729
    Abstract: An active matrix substrate having low susceptibility to contact failure between two conductor films is provided. An oxide semiconductor film converted into a conductor is provided in a layer between a substrate and a first metal film. Within a contact hole, the oxide semiconductor film converted into a conductor is in contact with a second metal film. Outside of the contact hole, the oxide semiconductor film converted into a conductor is in contact with the first metal film.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: April 27, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tohru Okabe, Hirohiko Nishiki, Takeshi Yaneda
  • Patent number: 10989859
    Abstract: A display apparatus includes a light guide member disposed below a display member. A light source configured to generate light is disposed adjacent to the light guide member. The light guide member includes a plurality of diffraction on the light guide member. The diffraction patterns are spaced apart from each other in the first direction. The plurality of diffraction patterns diffract incident light, which is incident at an incident angle, to change the incident light to diffraction light having a diffraction angle. The incident angle is defined as an angle between the incident light and a normal line that is perpendicular to a top surface or a bottom surface of the light guide member. The diffraction angle, which is defined as an angle between the diffraction light and the normal line, has a magnitude less than that of the incident angle.
    Type: Grant
    Filed: January 25, 2019
    Date of Patent: April 27, 2021
    Assignees: SAMSUNG DISPLAY CO., LTD., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, SEJONG CAMPUS
    Inventors: Seungin Baek, Sujin Choi, Hwi Kim, Mira Gwon, Youngeun Park, Jongha Park, Junghwan Yi, Young jin Jeon, Jungbeom Choi, Younho Han
  • Patent number: 10984732
    Abstract: An electronic device may have a display with an array of pixels configured to display images for a user. The electronic device may have an ambient light sensor for gathering ambient light information. The ambient light sensor may be at least partially covered by the display. The ambient light sensor may be switched into use during blanking periods when a portion of the display overlapping with the display is temporarily turned off. The ambient light sensor may include a photodetector, a first stage with an amplifier, first and second capacitors selectively coupled across the amplifier, and a second accumulation stage. During blanking time, the first capacitor may integrate photodetector current. During non-blanking, the charge stored in the first capacitor may be transferred to the second accumulation stage while the second capacitor applies an offset voltage to the photodetector to prevent undesired charge injection into the photodetector.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: April 20, 2021
    Assignee: Apple Inc.
    Inventors: Dong Zheng, Ali Motamed, Anand K. Chamakura
  • Patent number: 10984751
    Abstract: Method and system for providing, for display on a display device of an information handling system (IHS), one or more images; generating, by a blue-light mitigation computing module, a model of blue-light energy exposure based on the i) the blue-light energy output level of each image, ii) the environmental illumination brightness level, iii) the environmental illumination white color point, iv) the distance of the user, and v) the user exposure time; determining, by the blue-light mitigation computing module and based on the model, that a current blue-light energy exposure of the user with respect to the display device is above a threshold; and in response to determining that the current blue-light energy exposure of the user with respect to the display device is above the threshold, performing, by the blue-light mitigation computing module, an action to mitigate the blue-light energy exposure of the user.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: April 20, 2021
    Assignee: Dell Products L.P.
    Inventors: Stefan Peana, Deeder M. Aurongzeb
  • Patent number: 10986330
    Abstract: Presenting an image preview includes receiving image data from a GPU buffer, wherein the GPU buffer is associated with a media manipulation application, obtaining an orientation data for a display device, rendering a preview image using the image data and the orientation data, and displaying the preview image using the display device, wherein the preview image is displayed while the image data is utilized by the media manipulation application, and wherein the preview image is dynamically modified when the image data is modified by the media manipulation application.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: April 20, 2021
    Assignee: Apple Inc.
    Inventor: Timothy Dashwood
  • Patent number: 10976605
    Abstract: A picture compensation method and apparatus, a display device and a non-volatile computer-readable storage medium are disclosed.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: April 13, 2021
    Assignees: Beijing BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Zhihua Ji, Tiankuo Shi, Xiaomang Zhang, Yifang Chu, Yilang Sun, Chuanjun Liu, Xin Duan, Lingyun Shi, Yue Li, Yifan Hou
  • Patent number: 10978013
    Abstract: A method for driving a display apparatus. The method comprises: dividing an original gray scale data set of a pixel unit (110) into three grayscale data sets, and then, when the divided grayscale data sets are displayed, turning off backlight units (320), the colors of which are the same and occupy most of the colors corresponding to 0 grayscale data.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: April 13, 2021
    Assignees: HKC CORPORATION LIMITED, CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Chih Tsung Kang
  • Patent number: 10976480
    Abstract: The invention relates to a lighting device for a signal light of a motor vehicle, generating increased light propagation in a light guide. To this end, the lighting device comprises a light guide defined by a front face, a light source illuminating a first end of the light guide, and a first mask which is positioned in front of the light source and a part of the front face of the light guide, such that the first mask hides the light source from an observer looking at the front face of the light guide. Advantageously, the front face of the light guide, facing the first mask, is at least partially covered by a separating layer reflecting the light emitted by the light source.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: April 13, 2021
    Assignee: MARELLI AUTOMOTIVE LIGHTING FRANCE
    Inventors: Alain Buisson, Erwan Provot, Sean Patterson
  • Patent number: 10974572
    Abstract: A method and a corresponding device permit an at least partially computer-controlled and/or autonomous vehicle to communicate with its surroundings, in particular with a road user such as a person in its surroundings. A control unit for a vehicle is configured to receive surroundings data from one or more surroundings sensors of the vehicle and to detect at least one road user in the surroundings of the vehicle on the basis of the surroundings data. The control unit is configured to determine on the basis of the surroundings data whether there is a need for communication between the road user and the vehicle. The control unit is configured, if it has been determined that there is a need for communication between the road user and the vehicle, to actuate an adaptation system of the vehicle and/or one or more visual communication system in order to communicate with the road user.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: April 13, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Lenja Sorokin, Gunnar Franz
  • Patent number: 10971057
    Abstract: A display apparatus is provided. The display apparatus according to an embodiment includes an LED module including a plurality of light emitting diodes, an LED driver including a switching element comprising switching circuitry, the LED driver being configured to change a switching frequency of the switching element based on an intensity of a current provided to the LED module, and a processor configured to generate a Pulse Width Modulation (PWM) dimming signal based on pixel information of an input image and provide the signal to the LED driver, wherein the processor is further configured to control the LED driver to increase the switching frequency of the switching element within a dimming duty of the PWM dimming signal by reducing the intensity of the current provide to the LED module based on a pixel value of the input image being less than a threshold value.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: April 6, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sungbum Jung, Sungyong Joo
  • Patent number: 10963998
    Abstract: An electronic device may be provided with a display. Standard and high dynamic range content may be produced by content generators operating on control circuitry. Standard dynamic range content and high dynamic range content may be simultaneously displayed. Tone mapping parameters may be produced by a tone mapping engine for use in displaying the standard and high dynamic range content. The tone mapping parameters may be selected based on factors such as ambient light level, user brightness setting, content statistics, display characteristics, point of gaze information, power consumption information, and per-window information. Tone mapping parameters may be selected to accommodate simultaneous display of standard and high dynamic range content. Tone mapping parameters may be temporarily modified in response to a user's point of gaze switching between standard dynamic range content and high dynamic range content.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: March 30, 2021
    Assignee: Apple Inc.
    Inventors: Teun R. Baar, Jiaying Wu, Nicolas P. Bonnier, Ramin Samadani
  • Patent number: 10964276
    Abstract: A display apparatus includes: a light emission unit including a plurality of light sources that emit light; a display unit displays an image by modulating the light on the basis of frames; a determination unit determines a luminescence intensity of each of the light sources for each sub-frame; and a control unit controls lighting of each of the light sources for each sub-frame at the luminescence intensity, wherein the determination unit (1) determines a leakage light quantity, wherein the leakage light quantity is a transmission quantity of light from other light sources that is generated due to response delay in modulation by the display unit, for each region of the display unit corresponding to each of the light sources, and (2) determines the luminescence intensity in accordance with the difference of the leakage light quantity between the regions.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: March 30, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Mitsuru Tada, Takeshi Ikeda, Yasuo Suzuki
  • Patent number: 10957500
    Abstract: Systems and methods for selective keyboard backlighting with reduced driver circuitry are provided. In one example embodiment, a method includes, inter alia, simultaneously controlling, with a control signal, an output of a first light emitting element that illuminates only one key of a plurality of keys of a keyboard and an output of a second light emitting element that illuminates only one key of the plurality of keys, and maintaining, with a current mirror circuit, uniformity between the output of the first light emitting element and the output of the second light emitting element.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: March 23, 2021
    Assignee: Apple Inc.
    Inventors: Alejandro Lara Ascorra, Qian Zhang, Thai Q. La
  • Patent number: 10955592
    Abstract: The disclosure describes asymmetric turning films (ATFs) that may be used in conjunction with multiple light sources in a liquid crystal display assembly to provide multiple different characteristic output distributions of light. In some examples, the ATFs include a structured surface defining a plurality of microstructures having two or more faces with each face configured to reflect light in different directions. The microstructure may define a microstructure axis and an angle gradient characterizing the rotation of the microstructure axis across the structured surface of the ATF.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: March 23, 2021
    Assignee: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Kenneth A. Epstein, Nicholas A. Johnson, Michael E. Lauters, Shannon L. Siefken, Gary T. Boyd
  • Patent number: 10957233
    Abstract: A control method, suitable for a display panel including M scan lines and a plurality of source lines, include following operations. M is a positive integer. M gate signals are generated sequentially in M time periods during a first display frame to the M scan lines of the display panel. A level of a data signal to one of the source lines is updated in the M time periods during the first display frame. N gate signals are generated in N time periods selected from the M time periods during a second display frame to N scan lines selected from the M scan lines. (M-N) gate signals are suspended during the second display frame. The level of the data signal is updated in the N time periods and is not updated in the (M-N) time periods during the second display frame. N is a positive integer smaller than M.
    Type: Grant
    Filed: December 19, 2019
    Date of Patent: March 23, 2021
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Te-Hsien Kuo, Chin-Hung Hsu
  • Patent number: 10935838
    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.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: March 2, 2021
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventors: Dongchuan Chen, Xibin Shao, Yanping Liao, Zhenyu Zhang, Fangyu Wang, Xueqiang Qian, Wenchao Wang
  • Patent number: 10935843
    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.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: March 2, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Miyata, Naoto Inoue
  • Patent number: 10935841
    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.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: March 2, 2021
    Assignees: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Jiyang Shao, Yuxin Bi, Jian Sun, Feng Zi, Feng Pan, Hao Zhang
  • Patent number: 10939079
    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.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: March 2, 2021
    Assignee: Sony Corporation
    Inventors: Koji Miura, Takeshi Tanimoto, Keita Mori
  • Patent number: 10937358
    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.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: March 2, 2021
    Assignee: Intel Corporation
    Inventors: Junhai Qiu, Ajit Joshi, Jun Jiang, Sherine Abdelhak, Shravan Kumar Belagal Math, Nandini Mahendran
  • Patent number: 10922031
    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.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: February 16, 2021
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Takenori Yamamoto
  • Patent number: 10924760
    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.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: February 16, 2021
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Gary J. Sullivan, Yongjun Wu
  • Patent number: 10922800
    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.
    Type: Grant
    Filed: April 10, 2019
    Date of Patent: February 16, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jinpil Kim, Hoisik Moon, Jaesung Bae, Jeongwoon Lee, Namjae Lim
  • Patent number: 10916000
    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.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: February 9, 2021
    Assignee: Koninklijke Philips N.V.
    Inventors: Renatus Josephus Van Der Vleuten, Charles Leonardus Cornelius Maria Knibbeler
  • Patent number: 10908454
    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.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: February 2, 2021
    Assignees: SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD., TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Yaoyang Liu, Lei Niu, Jialing Li, Yuan Ding, Jun Ma
  • Patent number: 10909910
    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.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: February 2, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Young-hoon Jeong, Doo-seop Choi, Young-su Moon
  • Patent number: 10909948
    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.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: February 2, 2021
    Assignee: Diva Laboratories, Ltd.
    Inventors: Chih-An Chen, Wei-Peng Wang, Ching-Min Huang, Tzu-Hui Lee, Chuan-Ling Peng, Chi-Chou Huang, Huei-Jiun Li, Mei-Chuan Ku
  • Patent number: 10909898
    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.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: February 2, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Masamitsu Kobayashi
  • Patent number: 10902815
    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.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: January 26, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Eunhee Han, Seunghyun Park, Jonghwan Park, Young Je Cho
  • Patent number: 10899599
    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.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: January 26, 2021
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Rabab K. Ward
  • Patent number: 10904437
    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.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: January 26, 2021
    Assignee: SONY CORPORATION
    Inventors: Kenji Ikeda, Hisakazu Shiraki, Daisuke Tsuru
  • Patent number: 10902768
    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.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: January 26, 2021
    Assignees: K-TRONICS (SUZHOU) TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Zhihao Yan, Rong Shen
  • Patent number: 10902798
    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.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: January 26, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: John W Frederick, Greg Staten, Syed S Azam
  • Patent number: 10891912
    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.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: January 12, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Fumitaka Seki, Kenji Maeda