Patents Examined by Dong Hui Liang
  • Patent number: 11568819
    Abstract: A pixel driving circuit, a method for driving the same and a display panel are provided. In an embodiment, the pixel driving circuit includes: a driving circuit; a light-emitting circuit including a first electrode and a first reset circuit. In an embodiment, a working timing sequence of the pixel driving circuit includes working periods, one of which includes first and second light-emitting stages. In an embodiment, the first and second light-emitting stages each include a reset stage and a light-emitting stage, wherein, during the reset stage of the first light-emitting stage, the first reset circuit transmits a first reset voltage to the first electrode of the light-emitting circuit and during the reset stage of the second light-emitting stage, the first reset circuit transmits a modification reset voltage to the first electrode of the light-emitting circuit, the modification reset voltage being different from the first reset voltage.
    Type: Grant
    Filed: July 5, 2022
    Date of Patent: January 31, 2023
    Assignees: WUHAN TIANMA MICROELECTRONICS CO., LTD., Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch
    Inventors: Jian Kuang, Xingyao Zhou, Yana Gao, Mengmeng Zhang, Gaojun Huang
  • Patent number: 11557258
    Abstract: In an electroluminescence display apparatus and a driving method of an electroluminescence display apparatus, the electroluminescence display apparatus includes a pixel connected to a data line and a reference voltage line, the pixel including a driving element configured to generate a driving current based on a sensing data voltage supplied through the data line and a reference voltage supplied through the reference voltage line, and a level of the driving current being proportional to a level of the sensing data voltage, a comparison and tracking circuit configured to previously determine a target current range between a reference low current and a reference high current and change current tracking data for adjusting a level of the sensing data voltage until the driving current input through the reference voltage line is within the target current range, and a digital-to-analog converter configured to adjust a level of the sensing data voltage so as to be proportional to a size of the current tracking data a
    Type: Grant
    Filed: May 13, 2022
    Date of Patent: January 17, 2023
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Min Koo Kim, Tae Young Lee, Sang Goo Jeong
  • Patent number: 11551622
    Abstract: A display apparatus includes a display panel, a compensator, a controller, and a data driver. The compensator determines a degradation grayscale of a compensation region of the display panel. The degradation grayscale may be determined based on a driving time of at least one pixel in the compensation region and degradation data corresponding to the at least one pixel. The controller generates compensated image data for input image data based on the degradation grayscale. The data driver provides a data voltage to the at least one pixel based on the compensated image data.
    Type: Grant
    Filed: December 13, 2021
    Date of Patent: January 10, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seokgyu Ban, Wook Lee, Jaehoon Shin
  • Patent number: 11538419
    Abstract: A display apparatus includes a display panel in which a plurality of pixels and a plurality of data lines and a plurality of sensing lines connected to the pixels are arranged, a first driving circuit connected to data lines and sensing lines arranged in a first pixel column and a second pixel column adjacent to the first pixel column, and a second driving circuit connected to data lines and sensing lines arranged in a third pixel column adjacent to the second pixel column and a fourth pixel column adjacent to the third pixel column.
    Type: Grant
    Filed: June 11, 2021
    Date of Patent: December 27, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyungkeun Park, Jungtaek Kim, Kyunho Kim, Joonsuk Baik, Sekeun Lee, Sangsu Han
  • Patent number: 11538413
    Abstract: A pixel includes a display element, a driving transistor which controls an amount of a driving current flowing toward the display element, a first capacitor connected to a gate of the driving transistor, a scan transistor which transfers a data voltage to a source of the driving transistor, first and second compensation transistors connected to each other in series between the gate and a drain of the driving transistor, first and second emission control transistors which generates a path of the driving current between the display element and a power line, and a second capacitor connected between a floating node between the first and second compensation transistors and a gate of the second emission control transistor.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: December 27, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Keunwoo Kim, Meejae Kang, Dokyeong Lee, Taewook Kang
  • Patent number: 11537196
    Abstract: The technology disclosed can provide capabilities such as using motion sensors and/or other types of sensors coupled to a motion-capture system to monitor motions within a real environment. A virtual object can be projected to a user of a portable device integrated into an augmented rendering of a real environment about the user. Motion information of a user body portion is determined based at least in part upon sensory information received from imaging or acoustic sensory devices. Control information is communicated to a system based in part on a combination of the motion of the portable device and the detected motion of the user. The virtual device experience can be augmented in some implementations by the addition of haptic, audio and/or other sensory information projectors.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: December 27, 2022
    Assignee: Ultrahaptics IP Two Limited
    Inventor: David S. Holz
  • Patent number: 11538421
    Abstract: A display device includes display device includes: a display panel including a plurality of pixels; a data driver configured to generate data voltages based on output image data, and to provide the data voltages to the plurality of pixels; and a controller configured to receive input image data and input frequency information from a host processor, and to provide the output image data to the data driver, wherein the controller includes an adaptive refresh block configured to: determine a target frequency by analyzing the input image data; determine a masking ratio based on an input frequency represented by the input frequency information and the target frequency; and selectively output the input image data as the output image data by performing a masking operation on the input image data with the masking ratio.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: December 27, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hongsoo Kim, Sehyuk Park, Hyo Jin Lee, Sangan Kwon, Jinyoung Roh, Sukhun Lee, Jun Heyung Jung
  • Patent number: 11532282
    Abstract: A display may include an array of pixels. Each pixel in the array includes an organic light-emitting diode coupled to a drive transistor, a data loading transistor, a first capacitor for storing data charge, and a second capacitor. During a data programming phase, the data loading transistor may be activated to load in a data value onto the first capacitor. After the data programming phase, the second capacitor may be configured to receive a lower voltage, which extends a threshold voltage sampling time for the pixel. Configured and operated in this way, the temperature luminance sensitivity of the display can be reduced.
    Type: Grant
    Filed: October 14, 2021
    Date of Patent: December 20, 2022
    Assignee: Apple Inc.
    Inventors: Shinya Ono, Chin-Wei Lin, Zino Lee, Chun-Chieh Lin, Chen-Ming Chen
  • Patent number: 11532283
    Abstract: The present disclosure relates to a display device and an image processing method thereof, and includes a pixel shift processing unit configured to shift an image displayed in an active pixel region within the size of a dummy pixel region. The pixel shift processing unit gradually changes a gray level of at least one dummy pixel in the dummy pixel region adjacent to the active pixel region up to a target gray level of pixel data, and gradually changes a gray level of at least one active pixel of an active pixel adjacent to the dummy pixel region up to a black gray level when the active pixel region is shifted.
    Type: Grant
    Filed: November 8, 2021
    Date of Patent: December 20, 2022
    Assignee: LG Display, Co., Ltd.
    Inventors: Hae Jong Jang, Ji Hye Koo
  • Patent number: 11527217
    Abstract: A display panel including a first current source and a first pixel unit is provided. The first pixel unit includes a first switch and a first light-emitting diode. The first switch is coupled to the first current source and receives a first scan signal. When the first scan signal is enabled, the first switch is turned on and receives a first current provided by the first current source. The first light-emitting diode is coupled to the first switch. When the first switch is turned on, the first current passes through the first light-emitting diode to turn on the first light-emitting diode.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: December 13, 2022
    Assignee: INNOLUX CORPORATION
    Inventors: Geng-Fu Chang, Tsau-Hua Hsieh, Jui-Feng Ko, Tung-Kai Liu, Hirofumi Watsuda
  • Patent number: 11527190
    Abstract: An example computing device includes: a display to display a color calibration pattern; a touchpad to receive input for the computing device, the touchpad having a reflective layer to reflect the color calibration pattern; a color sensor to detect the reflected color calibration pattern from the touchpad; a processor interconnected with the color sensor and the display, the processor to calibrate a color output of the display based on the color calibration pattern detected at the color sensor.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: December 13, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Chia-Wen Chuang, Chia-Hung Chu, Chih-Chen Hung, Wan-Chieh Lu, Hung-Ming Chen
  • Patent number: 11527211
    Abstract: An organic light emitting diode display device includes a display panel including a plurality of sub-pixels, each of which includes a driving thin film transistor and a light emitting diode; and an impedance detection part connected to the plurality of sub-pixels of the display panel. The impedance detection part includes a sensing circuit part, an input control part, and an analog-to-digital converter. The input control part generates a modulated output by modulating an output of the sensing circuit part and inputs the modulated output to the analog-to-digital converter.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: December 13, 2022
    Assignee: LG Display Co., Ltd.
    Inventor: Seung-Ju Jo
  • Patent number: 11521549
    Abstract: A pixel driving circuit, a method for driving the same, and a display panel are provided. An operating sequence of the pixel driving circuit includes a first light-emitting stage and a second light-emitting stage after the first light-emitting stage. The first light-emitting stage includes a data writing stage and a light-emitting stage after the data writing stage. The second light-emitting stage includes a correcting stage and a light-emitting stage after the correcting stage. The pixel driving circuit includes a driving module, a threshold voltage capturing module configured to be turned on during the data writing stage and to write a data voltage to a control terminal of the driving module, and a coupling module configured to adjust a coupling voltage of the control terminal of the driving module during the correcting stage and the light-emitting stage of the second light-emitting stage.
    Type: Grant
    Filed: June 7, 2022
    Date of Patent: December 6, 2022
    Assignees: WUHAN TIANMA MICROELECTRONICS CO., LTD
    Inventors: Jian Kuang, Mengmeng Zhang, Xingyao Zhou, Lilian Kuang
  • Patent number: 11521553
    Abstract: A GOA circuit and a display panel are provided. The GOA circuit and the display panel decrease thin film transistors required by an inverter in a circuit structure. A thin film transistor number is decreased, and an area occupied by a GOA space can be effectively decreased, which facilitates decreasing of border sizes of panels. Gates of thin film transistors of the GOA circuit are controlled by clock signals that have not been attenuated, which can prevent failure resulting from an attenuated cascaded signal caused by threshold voltage drifting of thin film transistors.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: December 6, 2022
    Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., LTD.
    Inventor: Xiaobin Hu
  • Patent number: 11514867
    Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The display panel is configured to display an image. The driving controller is configured to generate a compensated image data for compensating a decrease of a luminance of an edge portion of the display panel based on input image data. The data driver is configured to output a data voltage to the display panel based on the compensated image data. The driving controller is configured to generate the compensated image data by comparing a maximum value among subpixel grayscale values of the input image data to which a luminance compensating coefficient is applied and a maximum grayscale value of the input image data. The luminance compensating coefficient is configured to be determined according to a location in the display panel.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: November 29, 2022
    Inventors: Jinpil Kim, Namjae Lim, Hoisik Moon, Jae Sung Bae
  • Patent number: 11514851
    Abstract: A display device includes a first luminescent device, a second luminescent device, a multi-color strobe decoder, a pseudo signal circuit and a single-color driving circuit. The multi-color strobe decoder is configured to generate two gate control signals. The second luminescent device and the pseudo signal circuit are coupled to the multi-color strobe decoder. The single-color driving circuit is coupled to the first luminescent device and the multi-color strobe decoder. When the single-color driving circuit provides first current for driving the first luminescent device according to the first gate control signal and/or a brightness enhancing signal, the pseudo signal circuit is configured to couple a first bias voltage to the multi-color strobe decoder according to the first gate control signal. When the second gate control signal drives the second luminescent device, the second luminescent device is configure to couple a second bias voltage to the multi-color strobe decoder.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: November 29, 2022
    Assignee: Qisda Corporation
    Inventors: Chi-Jen Chen, Wei-Chun Huang, Sung-Po Yeh
  • Patent number: 11508317
    Abstract: A display device includes a display unit which includes pixels, an emission driver which applies an emission control signal for allowing the pixels to emit light, and a signal controller which receives a data enable signal including an active period and a blank period during which an image signal is inputted and outputs a control signal for controlling the emission driver such that an emission period of the pixels is changed in response to a blank period.
    Type: Grant
    Filed: May 20, 2021
    Date of Patent: November 22, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Tae-Seok Ha, Kyoung Soo Kim, Kyu-Jin Park, Seung-Woon Shin, Woon-Rok Jang
  • Patent number: 11508319
    Abstract: A source driver capable of improving sensing accuracy even when a black image signal is provided to reduce motion blur during a sensing period for sensing signals of pixels of a display panel, and a display device including the same. The source driver includes an output buffer configured to output a source signal; a voltage terminal applied with a black image signal of a preset voltage level; a source output terminal connected to a data line of a display panel; and a switch circuit configured to connect one of an output terminal of the output buffer and the voltage terminal to the source output terminal, wherein the switch circuit connects the voltage terminal to the source output terminal during a black image insertion period of a sensing period in which a pixel of the display panel is sensed.
    Type: Grant
    Filed: August 27, 2021
    Date of Patent: November 22, 2022
    Assignee: Silicon Works Co., Ltd
    Inventors: Won Kim, Young Bok Kim
  • Patent number: 11507225
    Abstract: An electronic device, a fingerprint sensing control method and a fingerprint scanning control method are provided. A sensing region of a display panel is divided into a plurality of fingerprint zones. The electronic device determines at least one target fingerprint zone from the fingerprint zones according to a touched area. The electronic device scans the at least one target fingerprint zone to control the at least one target fingerprint zone for performing fingerprint sensing. The electronic device performs an accelerated scanning operation. The accelerated scanning operation includes: setting a scanning speed corresponding to at least one target scanning group coupled to at least the touched area to a first speed; and setting a scanning speed corresponding to one or more scanning groups other than the at least one target scanning group to a second speed higher than the first speed.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: November 22, 2022
    Assignee: Novatek Microelectronics Corp.
    Inventors: Shih-Cheng Chen, Cho-Hsuan Jhang, Chih-Peng Hsia, Shiang-Fei Wang, Su-Wei Lien
  • Patent number: 11501721
    Abstract: A display driving circuit includes: a grayscale voltage generator configured to generate a plurality of grayscale voltages by linearly dividing a plurality of gamma tap voltages; a gamma correction module configured to calculate a compensation value with respect to an input pixel value by using a compensation model, and configured to apply the compensation value to the input pixel value to generate a compensated pixel value; and a data driver configured to receive the plurality of grayscale voltages from the grayscale voltage generator, and configured to output a data voltage corresponding to a grayscale voltage to a display panel, the grayscale voltage being selected from the plurality of grayscale voltages based on the compensated pixel value.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: November 15, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joohyuk Yum, Byeongcheol Jang