Intensity Or Color Driving Control (e.g., Gray Scale) Patents (Class 345/690)
  • Patent number: 11030950
    Abstract: An organic light-emitting display includes: a display panel including first and second pixels, each having an organic light-emitting diode; and a data driver including a first operational amplifier having a non-inverting terminal coupled to a reference voltage terminal and an inverting terminal coupled to the first pixel, and a second operational amplifier having a non-inverting terminal coupled to the reference voltage terminal and an inverting terminal coupled to the second pixel. The first pixel includes a sensing transistor, a first driving transistor, and a first switch transistor. The second pixel includes a second driving transistor and a second switch transistor.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: June 8, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Oh Jo Kwon, Joo Hyung Lee, Kyung Youl Min
  • Patent number: 11030967
    Abstract: A display device includes an image analyzing part which determines whether current frame image data includes a crosstalk pattern, and a gamma voltage generator which generates current frame gamma data by applying the asymmetric gamma when the current frame image data do not include the crosstalk pattern, and generates the current frame gamma data by applying a symmetric gamma when the current frame image data includes the crosstalk pattern. The positive polarity and negative polarity data voltages of the asymmetric gamma are asymmetric with each other for each of the grayscales, and the positive polarity and negative polarity data voltages of the symmetric gamma are symmetric with each other for each of the grayscales.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: June 8, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyunho Kim, Bonggyun Kang, Sungjin Kim, Neung-Beom Lee, Jun Pyo Lee
  • Patent number: 11024243
    Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The image frames may be displayed with positive and negative polarities to help reduce charge accumulation effects. A charge accumulation tracker may analyze the image frames to determine when there is a risk of excess charge accumulation. The charge accumulation tracker may analyze information on gray levels, frame duration, and frame polarity. The charge accumulation tracker may compute a charge accumulation metric for entire image frames or may process subregions of each frame separately. When subregions are processed separately, each subregion may be individually monitored for a risk of excess charge accumulation.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: June 1, 2021
    Assignee: Apple Inc.
    Inventors: Chaohao Wang, Brijesh Tripathi, Christopher Philip Alan Tann, David S. Zalatimo, Guy Cote, Hao Nan, Marc Albrecht, Paolo Sacchetto, Sandro H. Pintz
  • Patent number: 11024259
    Abstract: A pixel compensation method, a pixel compensation apparatus and a pixel compensation system are disclosed. The pixel compensation method includes: sampling pixel values of an image to be displayed on a display screen to obtain target sampling data; transmitting the target sampling data; receiving pixel compensation data, wherein the pixel compensation data is determined according to an aging duration of the display screen which is determined based on the target sampling data; and compensating for the pixel values of the image to be displayed on the display screen based on the pixel compensation data. The pixel compensation method includes: receiving target sampling data obtained by sampling pixel values of an image to be displayed on a display screen; determining an aging duration of the display screen based on the target sampling data; determining pixel compensation data based on the aging duration; and transmitting the pixel compensation data.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: June 1, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Mingi Chu, Fei Yang, Yi Chen, Yu Wang, Lirong Wang
  • Patent number: 11022802
    Abstract: An apparatus includes a transceiver and a controller in communication with the transceiver. The controller is configured to determine a target lighting condition in a room relative to a current lighting condition in the room. The controller is also configured to generate a control signal with instructions to adjust an ambient lighting peripheral in the room based on the determined target lighting condition. The control signal is provided to the transceiver for transmission.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: June 1, 2021
    Assignee: Apple Inc.
    Inventors: Samuel L. Iglesias, In Young Yang, Timothy R. Oriol, James C. McIlree
  • Patent number: 11024255
    Abstract: A display panel is calibrated to a target white point. A maximum luminance value of the display panel is attenuated from a first luminance value associated with the target white point to a second luminance value based on an attenuation factor. The second luminance value is equal to or lower than the first luminance value. The display panel is re-calibrated based on a chromaticity of the target white point and the second luminance value to generate calibration data. The calibration data is flashed into memory associated with the display panel. During operation, the white point of the panel may be shifted from the target to a chromatically imbalanced (e.g., reddish) white point that may cause motion-induced color trail or color breakup artifacts. The attenuated second luminance value ensures the motion-induced color trail or color breakup artifacts are adequately masked when the panel is driven with the chromatically imbalanced white point.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: June 1, 2021
    Assignee: Apple Inc.
    Inventors: Gabriel Marcu, Rong Liu
  • Patent number: 11024242
    Abstract: A timing controller and an operation method thereof are provided. The timing controller is used to control a signal timing of a display panel. The timing controller includes an analysis circuit and a decision circuit. The analysis circuit analyzes the content of an image frame to obtain an analysis result. The decision circuit is coupled to the analysis circuit to receive the analysis result. The decision circuit determines a global gray level according to the analysis result. In a blanking interval in which a plurality of sub-pixel circuits of the display panel are turned off, a data voltage corresponding to the global gray level is applied to at least one data line of the display panel corresponding to the sub-pixel circuits.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: June 1, 2021
    Assignee: Novatek Microelectronics Corp.
    Inventors: Hui-Feng Lin, Yen-Tao Liao
  • Patent number: 11024241
    Abstract: A timing controller may include a first compensator configured to generate second data by optically compensating for first data, based on compensation data, a first compensation memory configured to store the compensation data, a second compensator configured to generate image data by compensating for a lifetime of the second data, based on accumulated data of the second data, and a second compensation memory configured to store the accumulated data and the compensation data.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: June 1, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyun Dae Lee, Seung Hyun Moon, Dong Wook Yang, Bit Na Lee, Hee Chul Hwang
  • Patent number: 11019318
    Abstract: A display device includes (a) a non-volatile memory containing corrective data for compensating input image data received; (b) display hardware receiving control and data signals for displaying an image; and (c) an image processing circuit that retrieves the corrective data from the non-volatile memory to generate the data signals for the display hardware, after applying the corrective data to each color component of each pixel in the input image data.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: May 25, 2021
    Assignee: CapsoVision Inc.
    Inventors: Kang-Huai Wang, Gordon C. Wilson
  • Patent number: 11018199
    Abstract: Provided are a method for driving a display panel, a display driving device and an electronic device. The method includes: acquiring any one frame of picture to de displayed; dividing the any one frame of picture to be displayed into a first partition picture, a second partition picture and a third partition picture; displaying the first partition picture in the first display region, displaying the second partition picture in the second display region, and displaying the third partition picture in the third display region; where in a same frame of picture to be displayed, a density A1 of sub-pixels for displaying the first partition picture, a density A2 of sub-pixels for displaying the second partition picture and a density A3 of sub-pixels for displaying the third partition picture satisfy that A1<A2?A3; and where sub-pixels in the second display region include first sub-pixels and second sub-pixels.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: May 25, 2021
    Assignee: Wuhan Tianma Micro-Electronics Co., Ltd.
    Inventors: Yajun Hei, Jingxiong Zhou, Ruiyuan Zhou
  • Patent number: 11016604
    Abstract: According to one embodiment, a display device includes a plurality of first electrodes overlap a display area, extend in a first direction, and are arranged in a second direction, a plurality of second electrodes overlap the display area, extend in the second direction, and are arranged in the first direction, a plurality of conductive lines are provided along the first electrodes, and connected to the second electrodes, respectively, and a touch detection driver is configured to detect contact or approach of an object with respect to the display area. In a case where a distance between a conductive line and one of the first electrodes near the conductive line is less than a predetermined value, a shielding portion is formed in the second electrode.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: May 25, 2021
    Assignee: Japan Display Inc.
    Inventor: Naoki Takada
  • Patent number: 11011098
    Abstract: Systems and methods for a six-primary color system for display. A six-primary color system increases the number of primary colors available in a color system and color system equipment. Increasing the number of primary colors reduces metameric errors from viewer to viewer. The six-primary color system includes Red, Green, Blue, Cyan, Yellow, and Magenta primaries. The systems of the present invention maintain compatibility with existing color systems and equipment and provide systems for backwards compatibility with older color systems.
    Type: Grant
    Filed: October 1, 2020
    Date of Patent: May 18, 2021
    Assignee: BAYLOR UNIVERSITY
    Inventors: Gary B. Mandle, James M. DeFilippis
  • Patent number: 11011086
    Abstract: A display device includes a display panel including a plurality of pixels, a power management circuit configured to generate an analog driving voltage, a correction data memory configured to store a plurality of unevenness correction data sets respectively corresponding to a plurality of analog driving voltage ranges, a controller configured to determine, among the plurality of analog driving voltage ranges, a current analog driving voltage range to which the analog driving voltage output from the power management circuit belongs, to select an unevenness correction data set corresponding to the current analog driving voltage range from the plurality of unevenness correction data sets stored in the correction data memory, and to correct image data based on the selected unevenness correction data set, and a source driver configured to receive the corrected image data from the controller, and to provide the plurality of pixels with data voltages corresponding to the image data.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: May 18, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jinwoo Park, Eun Suk Kim, Hoemi Kim, Kwangyoul Lee
  • Patent number: 11011585
    Abstract: The present disclosure provides a display panel including pixel areas arranged in array. The pixel area includes a sub-pixel area and a transparent area arranged in column direction. For two adjacent rows of pixel areas, sub-pixel areas/transparent areas of pixel areas in one row are disposed adjacent to sub-pixel areas/transparent areas of pixel areas in the other row. The sub-pixel area in an odd-numbered row of pixel areas is first sub-pixel area, in which first and second sub-pixels are arranged along row direction. The sub-pixel area in an even-numbered row of pixel areas is second sub-pixel area, in which third and fourth sub-pixels are arranged along row direction. First and third sub-pixels are arranged along column direction, and second and fourth sub-pixels are arranged along column direction. First, second and fourth sub-pixels emit light of different colors, and second and third sub-pixels emit light of a same color.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: May 18, 2021
    Assignee: Shanghai Tianma Micro-Electronics Co., Ltd.
    Inventor: Liang Xing
  • Patent number: 11009944
    Abstract: In one embodiment, a computing system may determine a first region and a second region of an image based on gaze data of a user. The second region may be displayed with lower image resolution than the first region. The system may access a first pixel value associated with the first region of the image. The system may cause a first source driver circuit of a display to generate a first pixel signal. The first pixel signal may be configured to control a luminance of a first number of pixels. The system may access a second pixel value associated with the second region of the image. The system may cause a second source driver circuit of the display to generate a second pixel signal which may be configured to control a luminance of a second number of pixels. The second number may be larger than the first number.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: May 18, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Min Hyuk Choi, Cheonhong Kim, Youngshik Yoon
  • Patent number: 11004406
    Abstract: A dual LCD device includes a gray LCD, a color LCD stacked on the gray LCD, a backlight assembly disposed at the rear of the gray LCD, and a controller. The controller is configured to receive an input image data and then respectively output a gray cell pixel data and a color cell pixel data to the gray LCD and the color LCD based on a dual cell dimming algorithm. The dual cell dimming algorithm is configured to alleviate a moiré effect caused by light interference between the gray LCD and the color LCD. The dual cell dimming algorithm includes: calculating an initial gray cell pixel data based on the input image data; calculating the gray cell pixel data by spatially blurring the initial gray cell pixel data; and calculating the color cell pixel data by compensating the gray cell pixel data.
    Type: Grant
    Filed: January 5, 2020
    Date of Patent: May 11, 2021
    Assignee: HIMAX TECHNOLOGIES LIMITED
    Inventor: Tung-Ying Wu
  • Patent number: 11004906
    Abstract: The present application discloses a display panel having a display area tessellated by repetition of a first subpixel group. The display panel includes an array of a plurality of first subpixel groups. Each of the plurality of first, subpixel groups includes a first subgroup and a second subgroup sequentially along a first direction. The first subgroup includes, a first subpixel of a first color, a first subpixel of a second color, and a first subpixel of a third color, sequentially along a second direction, the second direction being different from tire first direction. The second subgroup includes a second subpixel of the third color, a second subpixel of the second color, a second subpixel of the first color, a third subpixel of the third color, a third subpixel of the second color, and a third subpixel of the first color, sequentially along the second direction.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: May 11, 2021
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., Chengdu BOE Optoelectronics Technology Co., Ltd.
    Inventors: Lan Lan, Jianpeng Wu, Zhongying Yang, Yi Qu
  • Patent number: 11004391
    Abstract: An electronic device includes an electronic display having an active area comprising a pixel. The electronic device also includes processing circuitry configured to receive image data and predict a change in threshold voltage associated with a transistor of the pixel based at least in part on the image data. Furthermore, the processing circuitry is configured to adjust the image data to generate adjusted image data based at least in part on the predicted change in threshold voltage.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: May 11, 2021
    Assignee: Apple Inc.
    Inventors: Hei Kam, Junhua Tan, Wei H. Yao, Shihchang Chang, Derek K. Shaeffer, Chaohao Wang, Hyunwoo Nho, Yun Wang, Baris Cagdaser, Majid Gharghi, Yongjun Li, Aida Raquel Colon-Berrios, Mohammad Reza Esmaeili Rad, Hyunsoo Kim, Alex H. Pai, Hsin-Ying Chiu, Jiun-Jye Chang, Ching-Sang Chuang, Xin Lin
  • Patent number: 11004408
    Abstract: The present invention relates to a liquid crystal display device that provides improved local dimming. The liquid crystal display device includes: a liquid crystal display panel; a backlight unit divided and driven into a plurality of blocks and supplying light to the liquid crystal display panel; a local dimming value calculator calculating a dimming value of each of the blocks in accordance with input image data; and a backlight dimming controller having a pixel corrector correcting image data on the basis of the dimming values, in which the backlight dimming controller can correct at least some of the dimming values of the blocks calculated by the local dimming value calculator.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: May 11, 2021
    Assignee: LG ELECTRONICS INC.
    Inventors: Myongyoung Lee, Jongmin Lee, Taeha Um, Yeonoh Nam
  • Patent number: 11004907
    Abstract: The present disclosure provides a pixel arrangement, including repeating units each having a first to sixth pixel columns. The first pixel column includes a first sub-pixel of an ith pixel row and a second sub-pixel of a (i+2)th pixel row; the second pixel column includes third sub-pixels of a jth pixel row and a (j+2)th pixel row; the third pixel column includes a second sub-pixel of the ith pixel row and a first sub-pixel of the (i+2)th pixel row; the fourth pixel column includes a first sub-pixel of the jth pixel row and a second sub-pixel of the (j+2)th pixel row; the fifth pixel column includes third sub-pixels of the ith pixel row and the (i+2)th pixel row; and the sixth pixel column includes a second sub-pixel of the jth pixel row and a first sub-pixel of the (j+2)th pixel row, where i=1 and j=2; or j=1 and i=2.
    Type: Grant
    Filed: June 26, 2019
    Date of Patent: May 11, 2021
    Assignee: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Xian Chen, Lijing Han
  • Patent number: 11004374
    Abstract: A low-power display device in which an operation method is optimized in accordance with the resolution and the frame frequency of a content is provided. The display device includes a display unit and an image receiving apparatus. In the case where the resolution of a content is lower than the resolution that can be displayed by the display device, a source driver and a gate driver included in the display unit output signals to a plurality of source lines and gate lines, and the source driver and the gate driver are operated at lower operation frequencies. Furthermore, the power supply voltages of the logic circuit portions included in the source driver and the gate driver are lowered.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: May 11, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Kei Takahashi, Kensuke Yoshizumi, Shunpei Yamazaki
  • Patent number: 11004376
    Abstract: A scan driver for a display device includes scan signal output circuits connected to each other through scan lines. Each scan signal output circuit includes: a drive circuit to apply a first drive signal to a first drive node, to apply a second drive signal to a second drive node, and to apply a connection signal to a connection signal output node based on i) an input signal which is one of either a scan start signal or a scan signal applied by another scan signal output circuit, ii) a clock signal, and iii) an on-level voltage; and a buffer circuit to receive the connection signal, the first drive signal, and the second drive signal from the drive circuit, and to output one of scan signals to one of the scan lines based on the first drive signal, the second drive signal, and the clock signal.
    Type: Grant
    Filed: November 11, 2019
    Date of Patent: May 11, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yang Hwa Choi, Sun Kwang Kim, Sang Jin Jeon
  • Patent number: 10997882
    Abstract: A display device including: a panel unit including N data lines; and a data line driver unit including N channels, wherein the data line driver unit includes a channel amplifier unit, and a short detection device for detecting whether or not a short has occurred between two data lines among the N data lines, wherein N is an integer of 2 or more.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: May 4, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jin Oh Kim, Sung Jin Lim, Chul Ho Choi, Ryan Wang, Dashih Chang, Ha Joon Shin, Hanss Su, Jin Soo Kim, Jin Woo Kim, Kyung Gyu Park, Sam Liu, Yao Sheng Liang
  • Patent number: 10997920
    Abstract: A pixel drive circuit includes a drive unit, a boost sub-circuit and a light-emitting unit. The drive unit is configured to output a voltage; the boost sub-circuit is coupled to the drive unit and configured to receive and boost the voltage, and output a boosted voltage; and the light-emitting unit is coupled to the boost sub-circuit and configured to receive the boosted voltage.
    Type: Grant
    Filed: April 12, 2019
    Date of Patent: May 4, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Rongrong Shi, Shengji Yang, Wei Liu
  • Patent number: 10998068
    Abstract: A shift register circuit includes a first circuit, M second circuits, and N third circuits. M and N are both positive integers, N is an integer multiple of M, M is greater than or equal to 2, and a quotient of N and M is greater than or equal to 2. The first circuit includes a first signal output terminal. Each second circuit includes a second signal input terminal connected to the first signal output terminal. Each third circuit includes a third signal input terminal that is connected to one of second signal input terminals of the M second circuits. A second signal output terminal of each second circuit is connected to third signal input terminals of N/M third circuits, and different second signal output terminals are connected to different third signal input terminals.
    Type: Grant
    Filed: March 22, 2019
    Date of Patent: May 4, 2021
    Assignees: CHONGQING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Zhuo Xu, Yuanbo Zhang, Yajie Bai, Haipeng Zhu, Yan Zhou, Hailong Wu, Heecheol Kim, Min Ran
  • Patent number: 10991313
    Abstract: A display device includes a display panel, a left scan driver, a right scan driver, and a central scan driver. The display panel has a display area in which an image is displayed, and a non-display area in which an image is not displayed. The left scan driver and the right scan driver are respectively arranged in left and right non-display areas of the display panel. The central scan driver is arranged in a central area of the display panel. Subpixels adjacent to the central area of the display panel are small in size compared to subpixels arranged in other areas of the display panel.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: April 27, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Sunghun Kim, Jihyeon Park
  • Patent number: 10991317
    Abstract: A display device comprises a display panel where an input image including a moving image and a still image is displayed; a controller configured to generate a gain for decreasing a peak luminance of the still image and modulate a pixel data of the still image by the gain; and a display panel drive circuit configured to write the pixel data received from the controller to sub-pixels of the display panel, wherein the gain is set to be a different value on a different position on the display panel.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: April 27, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventor: Minchul Byun
  • Patent number: 10991293
    Abstract: The present invention relates to a source driver for a display apparatus, which is capable of removing delay of a DAC (Digital-Analog Converter) and in which a part of gamma lines for providing gamma voltages to the DAC is designed to have a large width and a small resistance value. Before driving a first gamma voltage to a level corresponding to display data, the DAC can select an adjacent gamma line having a small resistance value and drive a second gamma voltage, thereby removing a delay time.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: April 27, 2021
    Assignee: Silicon Works Co., Ltd.
    Inventor: Jae Kwan Lee
  • Patent number: 10991324
    Abstract: An overdrive method and device, a controller, a display apparatus, and a storage medium is provided. The method includes: acquiring a first grayscale value and a second grayscale value, the first grayscale value being a grayscale value of a first image displayed by a target sub-pixel and the second grayscale value being a grayscale of a second image to be displayed by the target sub-pixel; acquiring a hold duration that the target sub-pixel holds the first grayscale value in response to the first grayscale value being not equal to the second grayscale value; determining a target overdrive compensation voltage according to the first grayscale value, the second grayscale value, and the hold duration; and applying an overdrive pixel voltage to the target sub-pixel in response to the target sub-pixel displaying the second image, the overdrive pixel voltage being obtained according to the target overdrive compensation voltage.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: April 27, 2021
    Assignees: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yujie Gao, Zhihua Sun, Shulin Yao, Yinlong Zhang, Wenpeng Ma, Tong Lu, Pengfei Hu, Ning Zhang
  • Patent number: 10991773
    Abstract: Provided is a display panel having first and second display regions. The display panel includes: a base; an array portion located on base; and a light-emitting functional portion located on a side of the array portion facing away from base and including AMOLED and PMOLED light-emitting units. The AMOLED light-emitting unit is located in the first display region, the PMOLED light-emitting unit is located in the second display region, and the second display region is surrounded or partially surrounded by the first display region. The PMOLED and AMOLED light-emitting units each include an anode, and the anode of the PMOLED light-emitting unit has an area smaller than that of the AMOLED light-emitting unit; and/or, the display panel further includes a transparent carrier substrate located on a side of the light-emitting functional portion facing away from the base, and the PMOLED light-emitting unit has at least one film layer carried thereby.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: April 27, 2021
    Assignee: Xiamen Tianma Micro-Electronics Co., Ltd
    Inventor: Jujian Fu
  • Patent number: 10991284
    Abstract: A system includes a monitor stand configured to mount two or more display devices. The monitor stand includes an extension arm having an integral color calibration device. The extension arm can be manipulated to selectively position the color calibration device in contact with a light-emitting portion of each display device, and can be collapsed for stowage adjacent to the monitor stand. The system further controls the color calibration device to determine initial color attributes of each display device.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: April 27, 2021
    Assignee: Dell Products L.P.
    Inventors: Choon Keat (Alex) Chew, Wei Wei Wilson Chua, Chih-Hao (Gisir) Kao
  • Patent number: 10991288
    Abstract: Disclosed is a display driving device that supports accurate correction of the characteristics of pixels by reflecting the characteristics of a source driver in realtime. The display driving device may include: a sensing circuit configured to sense pixel signals for correcting characteristics of pixels of a display panel and sense at least one reference signal for correcting characteristics of a source driver when sensing the pixel signals; and an analog digital converter configured to convert the pixel signals and the at least one reference signal sensed by the sensing circuit into pixel data and reference data, and to transmit the pixel data and the reference data.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: April 27, 2021
    Assignee: Silicon Works Co., Ltd.
    Inventors: Su Hun Yang, Kyung Jik Min, Won Kab Oh, Jeong Hie Choi
  • Patent number: 10991346
    Abstract: A controller includes a bit shifter and a stain compensator. The bit shifter may determine a bit shift value corresponding to a stain compensation value according to an area of a display panel. The bit shift value represents a quantity of integer bits and a quantity of decimal bits. At least one of the quantity of integer bits and the quantity of decimal bits corresponds to a quantity of stain compensation steps. The stain compensator may compensate a grayscale value of input image data using the stain compensation value and the bit shift value to generate compensated image data.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: April 27, 2021
    Inventors: Jeong Woon Lee, Min Gyu Kim, Sang Cheol Park, Hoi Sik Moon
  • Patent number: 10989958
    Abstract: A display device includes a display panel in which display pixels including colored pixels of a plurality of colors are arranged, an illumination device including a light source and configured to illuminate the display panel with light, and a control substrate configured to control drive of the display pixels, wherein the control substrate includes a display data generation circuit configured to generate display data for driving the display pixels, based on image data supplied from an external image signal supply source, a detection circuit configured to detect a change in luminance light modulation data for modulating luminance of the light source, supplied from an external image signal supply source, and a display data correction circuit configured to correct the display data, based on an output value of the detection circuit.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: April 27, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Akihisa Iwamoto
  • Patent number: 10984734
    Abstract: A backlight driving device includes a plurality of drivers configured to drive a plurality of light-emitting elements arranged in a planar shape in a predetermined drive unit, and a control unit configured to output drive data directed to each of the plurality of drivers. The plurality of drivers are cascaded, each of the plurality of drivers bi-directionally performs an operation of, in a case of receiving the drive data directed to another driver input from a previous stage, outputting the drive data to a subsequent stage in a row of the plurality of drivers cascaded. In a case that at least one of the plurality of drivers has an abnormality, the control unit outputs the drive data to the driver located at one end of the plurality of drivers, and then outputs the drive data to the driver located at the other end of the plurality of drivers.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: April 20, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Kohji Ueno
  • Patent number: 10986275
    Abstract: An image display apparatus includes a light source emitting light; an optical scanner scanning a predetermined scanning zone with light from the light source to render a display image; a light intensity detector detecting a light intensity of light from the light source; a memory storing relationships between control currents provided to the light source and light intensities; and one or more processors controlling, on the basis of the control current and light intensity relationships stored in the memory, a control current to display the display image with light from the light source. When the optical scanner scans an area outside the display image, the one or more processors detect by the light intensity detector a light intensity of light for the scanning, and update on the basis of the light intensity the relationships stored in the memory.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: April 20, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Miho Higuchi, Takuro Yasuda
  • Patent number: 10984714
    Abstract: A method and an apparatus of compensating a display device, and the display device are provided. The display device includes pixel units in multiple rows and multiple columns, each of the pixel units includes sub-pixels having different colors, and each of the sub-pixels includes a pixel driving circuit and a light-emitting element connected to the pixel driving circuit, the pixel driving circuit includes a sensing line for sensing an electrical signal from the light-emitting element. The method includes: sensing electrical signals from light-emitting elements of sub-pixels having at least two different colors by using sensing lines corresponding to the sub-pixels having the at least two different colors within a display period of each image frame, wherein the subpixels having the at least two different colors are within different pixel units of the pixel units.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: April 20, 2021
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Haixia Xu, Zhidong Yuan, Min He, Wei Chen
  • Patent number: 10980111
    Abstract: A circuit board and a display device are disclosed. The circuit board includes an insulating layer and a metal foil layer. The metal foil layer is disposed on a surface of the insulating layer. The insulating layer comprises the graphene. The insulating layer comprises a glass felt semicured layer and a glass cloth semicured layer. The glass felt semicured layer and the glass cloth semicured layer are stacked. The glass felt semicured layer includes a glass felt layer and a high thermal conductive adhesive layer covering a surface of the glass felt layer. The glass cloth semicured layer comprises a glass cloth layer and the high thermal conductive adhesive layer covering a surface of the glass cloth layer. The high thermal conductive adhesive layer comprises the graphene, and the glass felt semicured layer and the glass cloth semicured layer also comprise the graphene.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: April 13, 2021
    Assignees: HKC Corporation Limited, Chongqing HKC Optoelectronics Technology Co., Ltd.
    Inventor: Qiong Wu
  • Patent number: 10977991
    Abstract: A pixel circuit comprises a light emission element; a driving transistor including a first electrode connected to the first node, a second electrode connected to a second node, and a gate electrode connected to a third node; a first transistor including a first electrode receiving a third voltage, a second electrode connected to the first node, and a gate electrode receiving a second light emission control signal; a first transistor including a first electrode connected to a first line transferring a first power voltage, a second electrode connected to the second node, and a gate electrode receiving a first light emission control signal; a first storage capacitor connected between the third node and a fourth node; and a switching transistor including a first electrode connected to a data line, a second electrode connected to the fourth node, and a gate electrode receiving a scan signal.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: April 13, 2021
    Inventor: Il-Hun Jeong
  • Patent number: 10977475
    Abstract: A fingerprint recognition sensor according to an exemplary embodiment of the present invention includes: a photo sensor for sensing light that is diffuse-reflected from a finger of a user and incident on the photo sensor, or that is transmitted through the finger and incident on the photo sensor; a first matrix positioned on the photo sensor and including a first opening; a second matrix positioned on the first matrix and including a second opening; and a cover layer including one surface contacting the finger and positioned on the second matrix, wherein, from among light that is diffuse-reflected from the finger and incident on the cover layer or that is transmitted through the finger and incident on the cover layer, light having an angle, formed by a normal line on the one surface of the cover layer and a path of the light incident on the cover layer, that is greater than a critical angle, sequentially passes through the second opening and the first opening and is incident on the photo sensor.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: April 13, 2021
    Assignee: SILICON DISPLAY TECHNOLOGY
    Inventors: Jong Woo Jin, Jin Hyeong Yu, Hyunwoo Jin, Jun Woo Chung, Youn Duck Nam
  • Patent number: 10978014
    Abstract: A Gamma voltage divider circuit, a voltage adjusting method, and a liquid crystal display device are proposed. Compared to the arrangement of voltage dividing resistor string of the existing Gamma voltage divider circuit, by changing the mapping of band point voltages, the application can optimize accuracy of low gray-level voltages in a further step, improve the display effect, and at the same time, reduce the number of voltage dividing resistors and lower the complexity and cost of the Gamma voltage divider circuit. The Gamma voltage divider circuit is adaptable to the voltage dividing resistor string settings of OLED display panels as well as LCD panels.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: April 13, 2021
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Weinan Yan
  • Patent number: 10978001
    Abstract: A pixel of a display panel includes a storage capacitor, at least one scan transistor to transfer first and second voltages to ends of the storage capacitor in response to a scan signal, a driving transistor to generate a driving current based on a difference between the first voltage and the second voltage stored in the storage capacitor, at least one emission transistor to selectively provide the driving current to an organic light emitting diode in response to an emission control signal, and the organic light emitting diode to emit light, wherein the first voltage is a sum of a data voltage and a pixel deviation compensation voltage for compensating a threshold voltage deviation between pixels included in the display panel, and wherein the second voltage is a panel deviation compensation voltage for compensating a threshold voltage deviation between display panels manufactured by a same process for the display panel.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: April 13, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hai-Jung In, Naoaki Komiya
  • Patent number: 10971052
    Abstract: A driving method and a driving device for a display panel, and a display device are provided. Each pixel of the display panel includes at least two primary-color sub-pixels of different colors and one mixed-color sub-pixel, and the driving method comprises: determining display power consumption according to the obtained brightness value of each of the primary-color sub-pixels; compensating for the brightness value of each of the primary-color sub-pixels according to the display power consumption; determining an output brightness value of each of the sub-pixels according to the compensated brightness value of each of the primary-color sub-pixels and a color coordinate of each of the sub-pixels; and outputting the output brightness value of each of the sub-pixels to a source driving circuit.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: April 6, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Danna Song
  • Patent number: 10971071
    Abstract: An organic light emitting display panel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel for respectively emitting differently colored lights, each of the sub-pixels including a switching transistor connected to a data line, and having a gate electrode configured to receive a scan signal, a driving transistor connected to the switching transistor, an emission control transistor connected to the driving transistor, and having a gate electrode configured to receive an emission control signal, an emission control line connected to the gate electrode of the emission control transistor, an organic light emitting diode connected the emission control transistor, and coupling capacitor including a first electrode including a portion of the emission control line, and a second electrode including an anode of the organic light emitting diode overlapping the portion of the emission control line, wherein capacitances of a first capacitor including the coupling capacitor of the first sub-pixel and a se
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: April 6, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jung-Hoon Shim
  • Patent number: 10971082
    Abstract: Data drivers and organic light emitting display devices having data drivers are provided in which a number of amplifiers for driving a display panel is reduced. A data driver includes an analog-to-digital converter, first and second amplifier circuits, a first switch coupled to an output of the first amplifier circuit, and a second switch and a third switch coupled to an output of the second amplifier circuit. The first switch is configured to selectively couple the output of the first amplifier circuit to a first data line and to second data line of a display panel. The second switch is configured to selectively couple the output of the second amplifier circuit to the second data line and to the analog-to-digital converter. The third switch is configured to selectively couple the output of the second amplifier circuit to a sensing line of the display panel.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: April 6, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Taewook Kim, Jungyoon Yi, Byungjae Lee
  • Patent number: 10971077
    Abstract: An OLED display device includes display panel and a panel driver. The panel driver receives input image data at an input frame frequency and determines whether the input image data represent a still image. When the input image data do not represent the still image, the panel driver drives the display panel at a first output frame frequency substantially equal to the input frame frequency. When the input image data represent the still image, the panel driver drives the display panel at a second output frame frequency lower than the input frame frequency for a low frequency driving time and drives the display panel at a third output frame frequency higher than the second output frame frequency for a high frequency insertion time determined by one of a panel characteristic of the display panel and a representative gray level of the input image data, after the low frequency driving time.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: April 6, 2021
    Inventors: Sangan Kwon, Hyojin Lee, Jinyoung Roh, Sehyuk Park
  • Patent number: 10964271
    Abstract: Disclosed are a source driver and a display device using the same, and the display device includes the source driver that generates sensing data by performing a pre-processing operation on pixel data obtained by sensing display pixels, and a timing controller that generates correction data for correction for pixel characteristics by performing a post-processing operation on the sensing data.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: March 30, 2021
    Assignee: Silicon Works Co., Ltd.
    Inventors: Yong Jung Kwon, Min Young Jeong, Sang Min Lee, Jeung Hie Choi
  • Patent number: 10962826
    Abstract: A light controlling apparatus and a transparent display device comprising the same are discussed, in which picture quality can be prevented from being deteriorated by a voltage drop. The light controlling apparatus can include a first base film including a first lower pad arranged at a first side edge on one surface and a second lower pad arranged at a second side edge on the one surface; a second base film including a first upper pad arranged at a third side edge on one surface facing one surface of the first base film and a second upper pad arranged at a fourth side edge on the one surface; and a flexible circuit board including driving voltage lines electrically connected with the first and second lower pads and common voltage lines electrically connected with the first and second upper pads.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: March 30, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Jae-Hyun Kim, Kihan Kim, Choonghyo Kim
  • Patent number: 10964238
    Abstract: Systems and methods for controlling a display apparatus are provided. In one example, an apparatus comprises a display comprising a plurality of light emitting diodes (LED), a display control circuit configured to generate display control signals, and a test module configured to generate test control signals. In a test operation mode, at least one LED of the plurality of LEDs is configured to be controlled by the test control signals from the test module to conduct at least one test output current. The test module can determine electrical characteristics of the at least one LED based on the at least one test output current. The display control circuit can adjust the display control signals based on the electrical characteristics of the at least one LED.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: March 30, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Ilias Pappas, William Thomas Blank
  • Patent number: 10964290
    Abstract: According to one implementation, a system for enhancing energy efficiency during display of an image through selective reduction of pixel intensity includes a computing platform having a hardware processor and a memory storing a software code. The hardware processor is configured to execute the software code to receive a first image including multiple pixels and having a first display power consumption when displayed on a display, and to change the intensity of each of a predetermined subset of the pixels of the first image into a predetermined intensity to generate a second image. The second image has a second display power consumption when displayed on the display, the predetermined intensity being such that the second display power consumption is lower than the first display power consumption.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: March 30, 2021
    Assignee: Disney Enterprises, Inc.
    Inventor: Alex Mendes de Souza