Gray Scale Capability (e.g., Halftone) Patents (Class 345/89)
  • Patent number: 10593269
    Abstract: A data driver includes a ramp signal generator generating a first ramp signal and a second ramp signal, a counter generating a count signal based on a clock signal, and channels each generating a data signal based on the first ramp signal, the second ramp signal, and the count signal. Each channel includes a latch circuit dividing the image data into a first partial data and a second partial data and latching the first and the second partial data, a duplication driver generating first and second reference signals by duplicating the first and second ramp signals, a digital-analog converter generating a driving signal corresponding to a first partial data based on the first and second reference signals, and an output circuit sampling the driving signal by comparing the second partial data with the count signal to output the data signal.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: March 17, 2020
    Assignees: Samsung Display Co., Ltd., Sogang University Research & Business Development Foundation
    Inventors: Sang Kuk Kim, Moonsang Hwang, Weonjun Choe, Tai-Ji An, Seung-Hoon Lee, Won-Kang Kim, Jun-Sang Park
  • Patent number: 10586504
    Abstract: A display apparatus includes a display panel, a data driving circuit, and a gate driving circuit. The display panel is configured to display an image and includes a gate line and a data line. The data driving circuit is configured to output a data signal to the data line. The gate driving circuit is configured to output a gate signal to the gate line and to control a kick-back time of the gate signal according to a temperature of the display panel. The kick-back time is a time when the gate signal is decreased from a gate on voltage to a kick-back voltage that is between the gate on voltage and a gate off voltage.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: March 10, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung-Woon Shin, Jahun Koo, Young-Il Kim, Sung-Jae Park, Sehwan An
  • Patent number: 10580385
    Abstract: A method for enhancing luminance uniformity of a display panel that includes multiple sub-pixels for a same color element is proposed to include: measuring, for each of the sub-pixels, luminance at multiple predetermined luminance codes, so as to obtain a plurality of data points; performing a two-stage curve fitting to obtain a fitting function that describes a curve fitting the data points; and performing demura operation on an image to be displayed by the display panel based on the fitting function.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: March 3, 2020
    Inventor: Hung-Cheng Kuo
  • Patent number: 10580370
    Abstract: According to an aspect, a display device includes first to fourth sub-pixels. The first to fourth sub-pixels are each divided into N (N?2) sub-divided pixels having different areas and can perform N-bit gradation display. Gradation display for a mixed color combining two types out of the first to fourth sub-pixels includes: the N-bit gradation display including 2N-step gradation; and halftone gradation display. In first and second gradation display, an area ratio between the sub-divided pixels driven and those not driven in one of the two types is equal to that in the other of the two types. In the second gradation display, a total area ratio of the sub-divided pixels driven to those not driven is greater than that in the first gradation display. In the halftone gradation display, an area ratio between the sub-divided pixels driven and those not driven is different between the two types.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: March 3, 2020
    Assignee: Japan Display Inc.
    Inventors: Tatsuya Yata, Kazunari Tomizawa
  • Patent number: 10580381
    Abstract: The present disclosure relates to systems and methods of accounting for the kickback voltage in an LCD display. For example, a method may include obtaining, via a processor, a difference between a nominal voltage of a common electrode of a display and a measured voltage of the common electrode. The processor may obtain image data associated with an image to be displayed on the display. The processor may adjust the image data of a pixel of the display based on the difference. The processor may output an image signal indicative of the adjusted image data to a pixel electrode of the pixel.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: March 3, 2020
    Assignee: Apple Inc.
    Inventors: Sheng Zhang, Chaohao Wang, Paolo Sacchetto, Yunhui Hou
  • Patent number: 10582176
    Abstract: This application relates to a method and a structure for generating a picture compensation signal, and a restoring system. A center luminance value is obtained by means of an image capturing device; then a grayscale percentage value is set by means of a calculating module, and luminance is adjusted according to the grayscale percentage value; a luminance value is obtained by means of the image capturing device according to the grayscale percentage value; a luminance difference value is obtained by means of a luminance difference detection module; and whether the luminance difference value is less than a default value is determined by a difference determining module; if the luminance difference value is less than the default value, a grayscale percentage value is reduced by the calculating module, and comparison again; and if the luminance difference value exceeds the default value, a sampling grayscale is obtained by a processing module.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: March 3, 2020
    Assignees: HKC Corporation Limited, Chongqing HKC Optoelectronics Technology Co., Ltd.
    Inventor: Bin Qiu
  • Patent number: 10573259
    Abstract: A display device according to an exemplary embodiment includes: a display panel including a display area which includes at least one non-quadrangle edge and a plurality of pixels; and a signal controller applying spatial-temporal division processing to an image signal corresponding to a first pixel which is not included in the non-quadrangle edge and bypassing the spatial-temporal division processing to an image signal corresponding to a second pixel which is included in the non-quadrangle edge.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: February 25, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sung Jae Park, Gi Geun Kim, Jae Sung Bae, Dong Hwa Shin, Kyung Su Lee, Jae-Gwan Jeon
  • Patent number: 10565945
    Abstract: A display driver includes a processing circuit to which information regarding a temperature range is input and that performs gamma conversion processing on display data with respect to gray level. In the gamma conversion processing, at a first set point, a first output gray level is gray level m when the temperature range is a first temperature range, and is gray level n (m and n are integers of zero or more and are different to each other) when the temperature range is a second temperature range, and the processing circuit changes, when the temperature range has transitioned from the first temperature range to the second temperature range, the first output gray level from gray level m to gray level n by a step smaller than |n?m|.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: February 18, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akihiko Ito, Masahiko Miura
  • Patent number: 10535291
    Abstract: Embodiments of the present disclosure provide a display device and a control method thereof, and a display system. The display device includes a substrate and a pair of sub-pixels disposed on the substrate. The pair of sub-pixels includes a display sub-pixel and an interference sub-pixel, wherein the display sub-pixel and the interference sub-pixel are different in at least one of color or gray scale, wherein the display device has a light outgoing direction intersecting with the substrate; in the light outgoing direction, a projection of the display sub-pixel on a main surface of the substrate at least partially overlaps with a projection of the interference sub-pixel on the main surface of the substrate; and the display sub-pixel and the interference sub-pixel are configured to be capable of respectively emitting light in non-overlapping time periods.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: January 14, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Chunbing Zhang
  • Patent number: 10535293
    Abstract: In a method of operating a display device, it is determined whether an image represented by input image data is a single color image, it is determined whether the image represented by the input image data is a low gray image, compensated image data are generated by adding sub-pixel data corresponding to a color different from a color of the single color image to the input image data when the image represented by the input image data is the single color image and the low gray image, and an image is displayed based on the compensated image data.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: January 14, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jun-Ho Hwang, Choonyul Oh, Sunjoon Hwang, Dongjun Han
  • Patent number: 10515598
    Abstract: A method of driving a display panel includes determining a present polarity of a pixel data signal of a present frame, generating a first compensated grayscale of the pixel data signal of the present frame using a pixel data signal of a previous frame, the pixel data signal of the present frame, and the present polarity, and displaying an image using the first compensated grayscale. The first compensated grayscale varies according to the present polarity.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: December 24, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyun Sik Hwang, Daecheol Kim, Yoongu Kim, Bongim Park, Ik Hyun Ahn, Woojoo Lee, Tae-Jong Jun
  • Patent number: 10510284
    Abstract: A display driver includes a drive circuit that receives input of a first reference voltage to an nth reference voltage (where n is an integer of two or more), and outputs a drive voltage that is based on a grayscale voltage obtained by voltage division of an ith reference voltage and an (i+1)th reference voltage (where i is an integer of n?1 or less), and a control circuit that utilizes frame rate control on first display data corresponding to a grayscale voltage obtained by voltage division of the first reference voltage and a second reference voltage to generate second display data, and supplies the second display data to the drive circuit.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: December 17, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Haruo Hayashi, Akihiko Ito
  • Patent number: 10504403
    Abstract: The present invention relates to a liquid crystal display (LCD) device which is capable of improving picture quality by switching an optimal gamma voltage and an optimal common voltage on a basis of an operation time, and a method for driving the same. The liquid crystal display device includes a timing controller, a voltage generating unit, a data driver, and a liquid crystal panel. The timing controller can generate voltage control signal for switching initial state to stable state by using certain switching point. The voltage generating unit can receive the voltage control signal, supply the first gamma voltage and the first common voltage during the initial state, and supply the second gamma voltage and the second common voltage during the stable state. The data driver can receive the first gamma voltage in the initial state and the second gamma voltage in the stable state.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: December 10, 2019
    Assignee: LG Display Co., Ltd.
    Inventor: Sun Kyu Park
  • Patent number: 10497328
    Abstract: A display panel driving apparatus includes a data driving part and a gate driving part. The data driving part is configured to convert image data into a data signal and output the data signal to a data line of a display panel. The gate driving part is configured to output, to a gate line of the display panel, a gate signal having different gate on voltages during a first sub-frame period of a frame period and a second sub-frame period subsequent to the first sub-frame period. Thus, display quality of a display apparatus may be improved.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: December 3, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: In-Jae Hwang, Hyun-Joon Kim
  • Patent number: 10497333
    Abstract: A liquid crystal display includes: a display section including first and second areas (ARa and ARb); a first driver substrate (Fa) for the first area; a second driver substrate (Fb) for the second area; a first-driver-substrate-voltage generating circuit (Pa) that supplies a drive voltage to a first voltage input terminal (xa1) of the first driver substrate; a second-driver-substrate-voltage generating circuit (Pb) that supplies a drive voltage to a second voltage input terminal (xb1) of the second driver substrate; and at least one switch (a1 and B1) that electrically connects or separates the first and second voltage input terminals (xa1 and xb1). In this configuration, the liquid crystal display has restrained luminance difference (luminance disparity) between the areas.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: December 3, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Makoto Shiomi
  • Patent number: 10497331
    Abstract: A source driver, an operation method thereof and a driving circuit using the same are provided. The source driver includes a gamma voltage generating circuit, a first voltage buffer and a reference voltage driving circuit. The gamma voltage generating circuit receives an inter reference voltage to provide a first gray level reference voltage corresponding to a first display gray level. The first voltage buffer is used for receiving the first gray level reference voltage to provide a driving voltage. The reference voltage driving circuit is coupled to the gamma voltage generating circuit and the first voltage buffer and used for accelerating rising speed or falling speed of the first gray level reference voltage.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: December 3, 2019
    Assignee: Novatek Microelectronics Corp.
    Inventors: Kuo-Che Hong, Ji-Ting Chen
  • Patent number: 10475373
    Abstract: A display device including a display unit including a plurality of light emitting elements, and a control unit that individually controls the plurality of light emitting elements in each of a plurality of main frames according to the gradation data externally input based on output from an external device. The plurality of main frames each include a plurality of sub-frames. The control unit turns on predetermined ones of the plurality of light emitting elements in a predetermined one of the plurality of main frames such that a difference between a gradation value of one or more of the plurality of sub-frames having a maximum gradation value and a gradation value of one or more of the plurality of sub-frames having a minimum gradation value is at least 2.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: November 12, 2019
    Assignee: NICHIA CORPORATION
    Inventor: Makoto Matsumoto
  • Patent number: 10467738
    Abstract: The present invention discloses a display gray scale curve correction system and method for molybdenum target mammography, comprising: a key module, an ARM module, an upper computer, an FPGA module connected with the outputs of the ARM module and the upper computer, and a display panel connected with the output of the FPGA module, wherein the upper computer firstly captures the currently displayed mammography, then analyzes the image features, calculates the optimized gray scale correction curve, and the ARM module writes the gray scale correction curve into the FPGA module through a serial communication protocol; the FPGA module performs grayscale mapping twice for pixel values of the input image, and enhances the display of the mammography image. Compared with the standard DICOM calibration curve, the features of the mammography X-ray image are included in the scope of the optimization, which can highlight the possible parts of the lesion.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: November 5, 2019
    Assignee: Nanjing Jusha Display Technology Co., Ltd.
    Inventor: Wei Wang
  • Patent number: 10467975
    Abstract: A display driving device includes a digital-to-analog converter generating analog image data, a plurality of pads connected to a plurality of data lines included in a display panel, a buffer circuit having a plurality of buffers receiving the analog image data to generate a data voltage, a first switch connected between an output terminal of the plurality of buffers and the plurality of pads, and a second switch connected between an input terminal of the plurality of buffers and the digital-to-analog converter, and a controller turning the first switch off and turning the second switch on to set at least a partial output of the plurality of buffers as new data voltages when the data voltage is output to the plurality of data lines through the plurality of pads.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: November 5, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Wook Suh, Chang Hee Shin, Hong Keun Yune, Seong Min Cheon
  • Patent number: 10460685
    Abstract: Disclosed are a gray scale voltage compensation method of a liquid crystal panel, a circuit for a liquid crystal panel and a liquid crystal panel including the circuit. The invention adjusts the common voltage and/or compensates the pixel voltage to minimize the afterimage of the whole liquid crystal panel under the premise of saving the cost of the liquid crystal panel and greatly improves the panel display performance.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: October 29, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Tao He, Yu-Yeh Chen, Yu Wu, Jhen-wei He
  • Patent number: 10453404
    Abstract: A display device operating at high speed is provided. The display device includes a buffer amplifier including first and second transconductance amplifiers and a buffer and pixels arranged in a matrix of x rows and y columns (x and y are integers greater than or equal to 2) and configured to express gray levels. In the first step, the offset voltage of the buffer amplifier is corrected using the second transconductance amplifier. Then, in the second step, a first analog signal corresponding to gray levels expressed by the pixels in two rows or more and x rows or less is input to one of a non-inverting input terminal and an inverting input terminal of the first transconductance amplifier, and a second analog signal corresponding to the first analog signal is output from an output terminal of the buffer.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: October 22, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Kei Takahashi
  • Patent number: 10453418
    Abstract: A display apparatus includes a timing controller, a common voltage generator, a data driver, and a display panel. The timing controller determines a representative grayscale of each frame based on input image data and generates a common voltage control signal having a first digital value ratio (“DVR”) value corresponding to a first frame, a representative grayscale of the first frame being included in a first grayscale range. The common voltage generator generates a first common voltage based on the common voltage control signal. The data driver generates a data voltage based on the input image data. The display panel displays an image corresponding to the first frame based on the data voltage and the first common voltage.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: October 22, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Han-Byul Lim, Seunghwan Moon, Myungbo Sim, Junpyo Lee
  • Patent number: 10453395
    Abstract: An electroluminescent (EL) display apparatus and method of controlling are provided. A display screen includes gate and source signal lines. A pixel corresponds to each intersection of the gate and source signal lines. Each pixel includes: an EL device including anode and cathode terminals, the cathode terminal being connected to a common reference voltage; a driving transistor to flow a current to the EL device; a first switch transistor provided on a current path through which the current flows from a power line through the driving transistor to the EL device; a second switch transistor to supply, to the driving transistor, an image signal from one source signal line; and a third switch transistor provided between the anode terminal of the EL device and a voltage line. The voltage line is configured to supply a reverse bias voltage for reverse biasing the anode terminal of the EL device.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: October 22, 2019
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Patent number: 10453378
    Abstract: A regulating method and a regulating apparatus for a driving voltage of a display module, wherein the method comprises: applying, to the display module, a gamma voltage pair corresponding to a grayscale to be tested, selecting a test image and maintaining the test image for a predetermined time duration (11); switching to a predetermined grayscale image that matches the grayscale to be tested, regulating a common voltage of the display module, and recording a direction and a magnitude of regulation of the common voltage (12); and restoring the common voltage to a magnitude before the regulation, and regulating the first gamma voltage and the second gamma voltage according to the recorded direction and magnitude of regulation of the common voltage (13). Regulation accuracy of the driving voltage can be improved, workload for debugging can be reduced and work efficiency can be improved.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: October 22, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Jinbo Ding, Ying Zhang, Xin Li, Dawei Li, Changjiang Wang, Xuchen Yuan
  • Patent number: 10446108
    Abstract: A display apparatus includes a display panel, a timing controller and a data driver. The display panel includes a first gate line, first and second pixels connected to the first gate line and adjacent to the first gate line in a first direction, and third and fourth pixels connected to the first gate line and adjacent to the first gate line in a second direction substantially opposite to the first direction. The timing controller is configured to generate a data signal based on a first gamma and a second gamma different from the first gamma.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: October 15, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dong-Hwa Shin, Jung-Won Kim, Jae-Sung Bae
  • Patent number: 10438540
    Abstract: Aspects of the subject technology relate to display circuitry. The display circuitry includes gate-in-panel (GIP) control circuitry on opposing sides of a display pixel array. The GIP control circuitry can include scan drivers for each pixel row on both sides of that pixel row, the scan drivers on either side configured for enablement or disablement for single-sided reduced-power operations. The GIP control circuitry can include a single scan driver and a single emission controller for each pixel row, in which the scan driver and emission controller for each row are disposed on opposing sides of the row. The scan drivers for a first subset of the pixel rows can be interleaved with the emission controllers for a different subset of the pixel rows.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: October 8, 2019
    Assignee: Apple Inc.
    Inventors: Shyuan Yang, Abbas Jamshidi Roudbari, Ting-Kuo Chang, Tsung-Ting Tsai, Warren S. Rieutort-Louis
  • Patent number: 10429920
    Abstract: A driving method includes: allocating multiple pieces of channel data to multiple first channel groups and multiple second channel groups; determining, based on the multiple pieces of channel data, a largest gray scale value difference of two adjacent pieces of channel data of each of the first channel groups, to determine multiple drive currents; or determining, based on a first piece of data and a second piece of data that correspond to each of the multiple second channel groups in the multiple pieces of channel data, a first transient value and a second transient value that correspond to each of the multiple second channel groups, where the multiple drive currents are used to drive the first channel groups; and determining, based on the first transient value and the second transient value, whether at least one of the second channel groups performs a power saving operation.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: October 1, 2019
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Jhih-Syuan Fu, Chun-Fan Chung
  • Patent number: 10416748
    Abstract: A method and apparatus for controlling an operation mode in a mobile terminal provides the mobile terminal to determine whether a predetermined time has elapsed, after a lapse of which it enters a first power-saving mode, and drive a camera module if the predetermined time has elapsed. Meanwhile, the mobile terminal determines whether a predetermined subject is recognized by the camera module, and then delays changing to the first power-saving mode if the predetermined subject is recognized, and enters the first power-saving mode if the predetermined subject is not recognized.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: September 17, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-Soo Jeong, Jin Park, Min-Ji Kim
  • Patent number: 10410565
    Abstract: An image processing device includes: a gain calculation section determining a gain, on the basis of a first partial image in a first frame image that includes a process target line; and a correction section correcting pixel luminance information regarding the process target line, on the basis of the gain.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: September 10, 2019
    Assignee: JOLED INC.
    Inventor: Fumihiko Fujishiro
  • Patent number: 10403218
    Abstract: A Mura compensation circuit and method, a driving circuit and a display device are provided. The Mura compensation circuit comprises: a vertical Mura compensation unit, for providing a corresponding gamma voltage to a vertical block Mura region and a vertical non-Mura region of a display panel respectively, to compensate for a vertical Mura phenomenon; and/or a horizontal Mura compensation unit, for providing a corresponding gate drive signal and/or a corresponding charging/discharging control signal to a horizontal block Mura region and a horizontal non-Mura region of a display panel respectively, to compensate for a horizontal Mura phenomenon. The Mura compensation circuit can make the different regions of the display panel have the same display effect, and improve reduction of display quality caused by impedance difference at different positions of the display panel, thereby raising the quality of a picture, and can be promoted and applied widely.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: September 3, 2019
    Assignees: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Co., Ltd.
    Inventors: Jian Zhao, Mo Chen, Yudong Liu, Xiong Xiong
  • Patent number: 10395608
    Abstract: Disclosed are a method and a device for improving an LCD large viewing angle display effect. The method includes: detecting an input RGB gray-scale voltage, when the input RGB gray-scale voltage meets a given preset condition, performing by a display panel an H/L switching display of two frames, and when the input RGB gray-scale voltage does not meet the given preset condition, performing by the display panel a normal display of two frames, wherein the given preset condition is: 80%*Rspecification?R?120%*Rspecification, 80%*Gspecification?G?120%*Gspecification or 80%*Bspecification?B?120%*Bspecification.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: August 27, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Lixuan Chen
  • Patent number: 10380947
    Abstract: A display including first to n-th pixels electrically connected with a first data line, and a data compensator for generating a reference voltage of a k-th pixel (k being between 1 and n) based on a first coupling voltage between the k-th pixel and the first data line and a second coupling voltage between the k-th pixel and a second data line, and comparing an average voltage generated based on a reference voltage of at least one of the first to n-th pixels with the reference voltage of the k-th pixel to generate a compensation signal, wherein the reference voltage of at least one of the first to n-th pixels is based on a coupling voltage between the at least one of the first to n-th pixels and the first data line and based on a coupling voltage between the pixels and the second data line.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: August 13, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Mitsuru Fujii, In Soo Wang
  • Patent number: 10373546
    Abstract: The disclosure provides an image display method and device. An image display method applicable a multi-domain display device includes: obtaining grayscales of respective pixels in one frame of input image; determining grayscales of the respective pixels in two adjacent frames of output image according to the grayscales of the respective pixels in the frame of input image, wherein the grayscale of any pixel in one of the two adjacent frames of output image is higher than the grayscale of the pixel in the input image, and the grayscale of the pixel in the other frame is lower than the grayscale of the pixel in the input image; and displaying the two adjacent frames of output image.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: August 6, 2019
    Assignees: Hisense Electric Co., Ltd., Hisense USA Corporation, Hisense International Co., Ltd.
    Inventor: Shunming Huang
  • Patent number: 10371993
    Abstract: A curved liquid crystal display includes a first panel having a pixel electrode including crossed stem parts, a plurality of fine branch parts extending from the crossed stem parts, and fine slits positioned between fine branch parts adjacent to each other, a second panel having a common electrode, and a liquid crystal layer between the first panel and the second panel. Misalignment between the first panel and the second lower panel is determined and a pitch, which is a sum of a width of the fine branch part and a width of the fine slit, gradually increases from a region having a small misalignment toward a region having a large misalignment.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: August 6, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Ho Kang, O Sung Seo, Seung Jun Yu, Ha Won Yu, Ki Kyung Youk, Yeo Geon Yoon, Sang-Myoung Lee, Tae Kyung Yim
  • Patent number: 10332472
    Abstract: A display device includes a display panel including a plurality of pixels, a power supply which supplies a common voltage and a distribution voltage to the display panel, and a timing controller which outputs a selection signal corresponding to image data input from the outside where the power supply supplies the distribution voltage having a value corresponding to the selection signal to the display panel.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: June 25, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yong Jin Shin, Tong Ill Kwak, Seung Hwan Moon
  • Patent number: 10332463
    Abstract: The present disclosure provides a driving method and a driving device of a liquid crystal display panel, where the driving method includes applying a liquid crystal voltage on each pixel is obtained when a preset grayscale voltage is input. The liquid crystal voltage is a difference between a pixel voltage and a common voltage. A compensated grayscale voltage is obtained according to the liquid crystal voltage, and an initial grayscale voltage is transformed to a target grayscale voltage according to the compensated grayscale voltage, where the target grayscale voltage is input to the liquid crystal display panel.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: June 25, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Sikun Hao
  • Patent number: 10319320
    Abstract: A display device includes a memory, a gray voltage generator, a signal controller, a data driver and a display panel, where the pixels are driven by a first driving data comprising first data which arranges a first image based on the first gamma curve and a second image based on the second gamma curve to each pixel, and a second driving data comprising second data which arranges the first image and the second image to each pixel with a different arrangement as the first data.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: June 11, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jung-Won Kim, Jae-Sung Bae
  • Patent number: 10318063
    Abstract: A touchscreen panel includes a first resistive film having a first electrode and a second electrode provided at corresponding ends thereof in a first direction; a second resistive film having a third electrode and a fourth electrode provided at corresponding ends thereof in a second direction perpendicular to the first direction; and a switch having a first end connected to the first electrode and a second end connected to a first end of a resistor group including a plurality of resistors, the resistor group having a second end connected to a certain electric potential. The switch is configured to allow one of the resistors of the resistor group to be selected and connected in series to the first resistive film.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: June 11, 2019
    Assignee: FUJITSU COMPONENT LIMITED
    Inventors: Kenichi Fujita, Satoshi Sakurai, Hiroshi Hasegawa, Masanobu Hayama
  • Patent number: 10311807
    Abstract: The present disclosure provides a gamma correction system and method. In the present disclosure, a gamma correction method used for a display panel of a liquid crystal display includes: measuring actual brightness values of preset highest grayscale and lowest grayscale of a central region of the display panel; calculating target brightness values of respective preset tie-point grayscales of the central area based on the actual brightness values, wherein the respective preset tie-point grayscale are located between the preset highest grayscale and the lowest grayscale; adjusting the respective preset tie-point grayscale of the central region and regions of both sides respectively according to the target brightness values, and computing compensating grayscale values of the adjusted respective preset tie-point grayscale; storing the compensating grayscale values, and correcting the gamma curves of the central region and the regions of both sides by using the stored compensating grayscale values.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: June 4, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Xinhong Chen
  • Patent number: 10304406
    Abstract: A display apparatus includes a display panel including a switching element connected to a data line and a gate line, a pixel electrode connected to the switching element, a common electrode facing the pixel electrode and a liquid crystal layer disposed between the pixel electrode and the common electrode. The display apparatus further includes a data driving circuit configured to convert image data to a data voltage. The display apparatus further includes a driving voltage generator configured to generate a common voltage, in response to a voltage control signal from a timing controller, to the common electrode and the data driving circuit, which is configured to output the common voltage to the pixel electrode during an initial setting period when power is turned on to the display apparatus.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: May 28, 2019
    Assignee: SAMSUNG DISPLAY CO., Ltd.
    Inventors: Jeong-Oh Jin, Hyeok-Tae Kwon, Dongkeon Kim, Seonhye Kim, Se-Won Min, Hyunjung Son, Utah Choi
  • Patent number: 10304371
    Abstract: The liquid crystal drive apparatus includes a tone setter that sets drive tones depending on input tones that are tones of an input image, a driver that controls, depending on the drive tones, a voltage applied to each of multiple pixels of a liquid crystal element to a first voltage or a second voltage lower than the first voltage in respective multiple sub-frame periods included in one frame period to cause that pixel to form a tone or controls a drive voltage applied to each of the multiple pixels, and a temperature detector that detects a temperature of or around the liquid crystal element. The tone setter changes, when the input tones include a first tone and a second tone higher than the first tone, the drive tone for the second tone depending on the detected temperature.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: May 28, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masao Ono, Masayuki Abe
  • Patent number: 10276078
    Abstract: An organic light emitting display device and a method of repairing the device are discussed. According to an embodiment, the device includes a display panel having pixels, each including an OLED in every pixel area defined as scan and data lines intersect with each other and having a repair structure in at least one of horizontal and vertical directions between adjacent pixels by one or more repair lines; a timing controller configured to generate compensation data when a dark spot is generated in one of the plurality of pixels of the display panel, and adjust a magnitude of image data according to the compensation data; and a data driver configured to adjust a magnitude of a data voltage according to the image data adjusted in magnitude, and output the data voltage adjusted in magnitude to the data lines.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: April 30, 2019
    Assignee: LG DISPLAY CO., LTD.
    Inventors: YoonJu Lee, JeongHwan Kim, SooHong Choi, HongJae Shin, KwangMo Park, JaYeon Song
  • Patent number: 10276111
    Abstract: A mura compensation method for display panel is disclosed, including: storing a plurality of compensation values of the display panel performing mura grayscale compensation, the plurality of compensation values corresponding to compensation by the display panel for different grayscales, the compensation value corresponding to a lowest grayscale gmin among different grayscales being a first compensation value a; obtaining a head compensation value m corresponding to grayscale 0, m being not 0; obtaining a current grayscale of the display panel; if the current grayscale of the display panel being between grayscale 0 and the lowest grayscale gmin, performing linear interpolation based on the first compensation value a and the head compensation value m to obtain a first target compensation value corresponding to the current grayscale; based on the first target compensation value, performing compensation to the current grayscale of the display panel. A display panel is also disclosed.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: April 30, 2019
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Hua Zhang
  • Patent number: 10274801
    Abstract: A display panel includes a substrate, a plurality of first signal lines, a plurality of second signal lines, a plurality of sub-pixel electrodes, and a first common electrode layer. The plurality of first signal lines and the plurality of second signal lines define a plurality of pixel areas together. Each of the plurality of sub-pixel electrodes is disposed in one of the plurality of pixel areas. The first common electrode layer includes a plurality of first common electrodes electrically connected to each other. Each first common electrode includes a stem and a plurality of branches, and the plurality of branches is coupled to two sides of the stem and extends away from the stem. An orthogonal projection of each stem onto the substrate is located between two adjacent sub-pixel electrodes. Orthogonal projections of the branches onto the substrate at least correspond to one sub-pixel electrode.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: April 30, 2019
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Yen-Hua Lo, Szu-Yen Lin, Hsin-Chun Huang, Ching-Sheng Cheng
  • Patent number: 10275012
    Abstract: A method for driving a display and an electronic device supporting the same are provided. The method includes determining a luminance setting of an output of a display panel; generating a gamma value corresponding to at least one sub pixel among sub pixels composing a pixel of the display panel when the luminance setting is equal to or lower than a specified value; and supplying the generated gamma value to the at least one sub pixel and at least one other sub pixel.
    Type: Grant
    Filed: May 22, 2017
    Date of Patent: April 30, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong Kon Bae, Dong Hwy Kim, Dong Kyoon Han, Han Yu Ool Kim
  • Patent number: 10269285
    Abstract: A display device includes: a display unit; a plurality of pixels disposed in the display unit, each pixel including first and second blue sub-pixels; and a driving mode controller configured to set a driving mode to one of a first driving mode in which both of the first and second blue sub-pixels emit light, and a second driving mode in which one of the first and second blue sub-pixels emits light, wherein the first blue sub-pixel emits light of a first frequency, and the second blue sub-pixel emits light of a second frequency different from the first frequency.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: April 23, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Changhoon Lee, Byeonghee Won, Ilnam Kim, Wonsang Park, Jongin Baek
  • Patent number: 10269286
    Abstract: Embodiments of the present disclosure provide gamma correction method and device for a display module. The gamma correction method includes: determining, for each sub-pixel of a display module to be corrected, the highest data voltage and the lowest data voltage after gamma correction of the highest gray scale and the lowest gray scale of the display module; determining at least one set of alternative gamma register values that are capable of performing gamma correction of the display module; determining at least one set of gamma register values to be corrected for respective gray scales before the gamma correction of the display module; and performing gamma correction of the display module by adjusting the gamma register value corresponding to the gray scale to be corrected which needs to perform gamma correction.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: April 23, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., ORDOS YUANSHENG OPTOELECTRONICS CO., LTD.
    Inventors: Zhiguang Zhang, KwangGyun Jang, Chang Zhang, Hualing Yang, Jing Liu
  • Patent number: 10255838
    Abstract: Provided is a semiconductor device in which power consumption and rewrite time needed for changing the parameter for color adjustment, dimming, or the like are reduced. One embodiment of a semiconductor device of the present invention includes an image processing portion including a plurality of functional circuits configured to correct image data, a plurality of scan chains corresponding to the plurality of functional circuits, and a controller controlling operations of the plurality of scan chains. During a state in which the controller controls the scan chains so that one or more scan chains chosen from the plurality of scan chains are driven and the scan chains except for the one or more scan chains are not driven, a parameter stored in one or more functional circuits connected to the one or more scan chains is rewritten.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: April 9, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Seiichi Yoneda, Yuki Okamoto, Yoshiyuki Kurokawa
  • Patent number: 10255856
    Abstract: In accordance with an embodiment, a display device may include a display panel including a plurality of pixels, a dimming controller for setting a first gamma correcting offset of a reference pixel among the plurality of pixels, setting a second gamma correcting offset of at least one pixel other than the reference pixel among the plurality of pixels, and generating a corrected gamma reference voltage per pixel using the first gamma correcting offset and the second gamma correcting offset and a data driver applying the corrected gamma reference voltage to each pixel of the display panel. According to an embodiment, there may be provided a display device capable of eliminating color shift by setting an offset for a gamma reference voltage per pixel and a driving method of the same.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: April 9, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chae Han Hyun, Seung Kyu Lee
  • Patent number: 10234740
    Abstract: A display device comprises a substrate having a display area, first and second gate lines extending in a first direction in the display area, first and second data lines extending in the display area in a second direction intersecting the first direction, and a pixel defined by the first and second gate lines and the first and second data lines, and having a thin-film transistor and a pixel electrode. The thin-film transistor comprises a gate electrode connected to the second gate line, a source electrode connected to the first data line, and a drain electrode spaced apart from the first source electrode. The drain electrode includes a first end portion extending in the second direction and overlapping with the gate electrode in plan view, and a second end portion electrically connected to the first end portion and to the pixel electrode.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: March 19, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: IIMan Choi, Jin Kim, Hojin Jung, Sangpil Yoon