Patents Examined by Sepehr Azari
  • Patent number: 11727851
    Abstract: A gate driver includes active stages that output gate signals to a display part and pre-stages connected to the active stages to output carry signals to the active stages. The pre-stages include a first pre-stage and a second pre-stage. The second pre-stage includes a Q node compensator that receives a clock signal from the first pre-stage and compensates for a voltage of a Q node based on the clock signal of the first pre-stage. The Q node compensator includes a feedback transistor that diode-connects a feedback input terminal, which receives the clock signal of the first pre-stage, to a feedback node of the second pre-stage. The feedback transistor includes a first electrode, a second electrode, and a third electrode, where the first electrode is connected to the feedback input terminal, the second electrode is connected to the first electrode, and the third electrode is connected to the feedback node.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: August 15, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Junghwan Hwang, Doo-young Lee
  • Patent number: 11727868
    Abstract: Disclosed are a pixel circuit, a driving method of the pixel circuit and a display device, the pixel circuit including a reset unit, a voltage writing unit and a light-emitting control unit, the reset unit is connected to a reset control signal terminal, and resets the pixel circuit under the control of the reset control signal; the voltage writing unit stores a data signal and a threshold voltage of a driving transistor under the control of the scan control signal; the light-emitting control unit is connected to a light-emitting control signal terminal and includes the driving transistor, and use the data signal and the threshold voltage to generate a current under control of the light-emitting control signal; the light-emitting control unit includes a first type transistor, the reset unit and the voltage writing unit include a second type transistor different from the first type transistor.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: August 15, 2023
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Can Zheng
  • Patent number: 11727886
    Abstract: A display panel, a drive method, and a display apparatus are provided in the present disclosure. The display region of the display panel includes a plurality of scan line units; and each scan line unit includes two scan lines which extend along the first direction and are arranged along a second direction. The method includes, for displaying M frames of pictures, receiving a scan drive signal sequentially by a plurality of scan lines arranged along the second direction; and for displaying N frames of pictures adjacent to the M frames of pictures, receiving the scan drive signal sequentially by the plurality of scan line units arranged along the second direction; and along the second direction, for each same scan line unit, receiving the scan drive signal by an ith scan line after an (i+1)th scan line receives the scan drive signal.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: August 15, 2023
    Assignees: WUHAN TIANMA MICRO-ELECTRONICS CO., LTD., WUHAN TIANMA MICROELECTRONICS CO., LTD. SHANGHAI BRANCH
    Inventors: Yue Li, Peng Zhang, Mengmeng Zhang
  • Patent number: 11721290
    Abstract: A gate driving circuit and a display device including the same are disclosed. The gate driving circuit includes signal transmitters receiving a start pulse, a shift clock, a charge/discharge clock, a back-bias clock, a high-potential driving voltage, and a low-potential reference voltage, and connected in a cascade structure. An Nth (N is a positive integer) signal transmitter of the signal transmitters includes a first control node; a second control node; a first controller controlling charging and discharging of the first control node by using at least one transistor to which the back-bias clock is inputted; a second controller controlling charging and discharging of the second control node; a first output buffer outputting a carry pulse in response to voltages of the first and second control nodes; and a second output buffer outputting a gate pulse.
    Type: Grant
    Filed: September 26, 2022
    Date of Patent: August 8, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Jae Sung Yu, Jae Hoon Park
  • Patent number: 11714593
    Abstract: A modular display apparatus is provided. The modular display apparatus includes a plurality of display apparatuses, each of which includes a plurality of pixels; a storage configured to store a plurality of gain sets, each of which includes gain values respectively corresponding to a plurality of power loads; and a processor configured to: identify a gain set from among the plurality of gain sets based on a resolution of the modular display apparatus; transmit the gain set to the plurality of display apparatuses; receive a plurality of gain values which respectively correspond to power loads for the plurality of display apparatuses to display an image from the plurality of display apparatuses; and transmit a gain value from among the plurality of gain values to the plurality of display apparatuses. Each of the plurality of display apparatuses is configured to display the image by driving a plurality of light-emitting devices of the plurality of pixels based on the gain value received from the processor.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: August 1, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Joohyun Lee, Junhyung Shin, Jiyong Park, Seongkoo Cheong
  • Patent number: 11715428
    Abstract: A pixel circuit and a display device including the same are disclosed. The pixel circuit includes: a first driving element including a first electrode connected to a 1-1 th node, a gate electrode connected to a 1-2 th node, and a second electrode connected to a 1-3 th node; and a second driving element including a first electrode connected to a 2-1 th node, a gate electrode connected to a 2-2 th node, and a second electrode connected to a second-third node. A second electrode voltage of the first driving element is transmitted to the gate electrode of the second driving element, and a second electrode voltage of the second driving element is transmitted to the gate electrode of the first driving element.
    Type: Grant
    Filed: September 19, 2022
    Date of Patent: August 1, 2023
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Seung Ho Heo, Dong Hyun Lee
  • Patent number: 11710451
    Abstract: A display device includes a display panel and a driver which receives image signals and transmits data signals to the display panel. The driver includes an image sticking compensator that converts the image signals such that the first image is periodically shifted while being displayed. The image sticking compensator includes an extractor which extracts compensation area data corresponding to a first image displayed in a compensation area, a calculator which calculates fixed data based on the compensation area data and corresponding to the first image, and a shifter which generates shift-fixed data based on the fixed data. The compensation area includes a first area in which the first image is displayed and a second area in which a peripheral image at least partially surrounding the first image is displayed.
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: July 25, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Jungyu Lee
  • Patent number: 11705467
    Abstract: The disclosure provides a display device and a driving method thereof. The display device has a camera region. The camera region includes multiple camera pixels. In a display mode, multiple camera pixels are in a state that a light beam is not allowed to pass through. In a camera mode, multiple camera pixels are in a state that a light beam is allowed to pass through.
    Type: Grant
    Filed: July 19, 2021
    Date of Patent: July 18, 2023
    Assignee: Innolux Corporation
    Inventors: Chia-Hao Tsai, Youcheng Lu, Ming-Jou Tai, Wei-Yen Chiu, Yung-Hsun Wu
  • Patent number: 11705073
    Abstract: The present disclosure relates to a DRD type display panel. The display panel includes first to fourth pixels; a first data line through which a data signal is transmitted to the first and second pixels; a second data line through which a data signal is transmitted to the third and fourth pixels; a first gate line through which a scan signal is transmitted to the first and third pixels; a second gate line through which a scan signal is transmitted to the second and fourth pixels; a reference voltage line used to detect deterioration of OLEDs in the first to fourth pixels; a first power line positioned on the left of the first data line and supplying driving power to the first and second pixels; and a second power line positioned on the right of the second data line and supplying driving power to the first and second pixels.
    Type: Grant
    Filed: December 15, 2020
    Date of Patent: July 18, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Hyung-Seok Seo, Young-Hoon Kim
  • Patent number: 11705071
    Abstract: A display device includes pixels electrically connected to a plurality of scan lines and a plurality of data lines, respectively, a scan driver that provides a scan signal to each of the plurality of scan lines, a voltage supply that supplies a first gate voltage to the scan driver through a first gate power line, and a voltage compensator. The voltage compensator senses a partial voltage of the first gate voltage applied to the scan driver through a feedback line. The voltage compensator compensates the first gate voltage with a second gate voltage in case that the sensed first gate voltage is greater than a first reference voltage.
    Type: Grant
    Filed: May 10, 2022
    Date of Patent: July 18, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin Won Jang, Seung Won Kuk, Myung Chul Kim
  • Patent number: 11694637
    Abstract: A display device according to an embodiment includes a plurality of pixel blocks including a plurality of pixels connected to a plurality of scan lines and a plurality of data lines, respectively, and at least one active circuit; and a data driver supplying a data voltage to the plurality of data lines in a light emitting mode and supplying a neural network input signal to the plurality of data lines in an artificial neural network mode. In the artificial neural network mode, a scan signal is supplied to a scan line connected to at least one pixel block among the plurality of pixel blocks, and the neural network input signal is supplied to a data line connected to the at least one pixel block.
    Type: Grant
    Filed: July 8, 2022
    Date of Patent: July 4, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Young Wook Yoo, Pil Ho Kim
  • Patent number: 11694630
    Abstract: A display device includes a display panel including a pixel coupled to first to fourth scan lines, an emission control line, and a data line, a scan driver which supplies a first scan signal to the first scan line, a second scan signal to the second scan line, a third scan signal to the third scan line, and a fourth scan signal to the fourth scan line, an emission driver which supplies an emission control signal to the emission control line, a data driver which supplies a data signal to the data line, and a timing controller which controls the scan driver, the emission driver, and the data driver. Each of the second and third scan signals has a gate-on level during a partial period of one frame, and is maintained at a gate-off level during a remaining period of the one frame, other than the partial period.
    Type: Grant
    Filed: July 7, 2022
    Date of Patent: July 4, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ja Kyoung Jin, Yu Chol Kim, Ji Hye Kim, Seong Oh Yeom
  • Patent number: 11688341
    Abstract: An electronic device is provided. The electronic device includes a display panel and a display driver integrated circuit configured to drive the display panel. The display driver integrated circuit is configured to determine a luminance value of the display panel if a request for a change from a current driving frequency of the display panel to a target driving frequency is received, and determine at least one intermediate driving frequency between the current driving frequency and the target driving frequency depending on the luminance value of the display panel.
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: June 27, 2023
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Minwoo Lee, Seungryeol Kim, Seungjin Kim, Junghyun Kim, Byungduk Yang, Gwanghui Lee, Seoyoung Lee, Juseok Lee, Woojun Jung
  • Patent number: 11682347
    Abstract: The present disclosure relates to the field of display technology, and describes a pixel driving circuit detection method, a display panel, a driving method thereof, and a display device. The detection method includes inputting a reference voltage to the data line during at least part of the initial phase; turning on the first and second switch sub-circuits during the charging phase, to input the detection voltage to the data line, while inputting the reset voltage to the sensing line; turning on the second switch sub-circuit during the charging phase, to input the driving current by the driving transistor to the sensing line under the effect of the detection voltage; turning off the first and second switch sub-circuits during the detection phase, to detect the voltage on the sensing line; and obtaining the mobility of the driving transistor according to the voltage on the sensing line detected in the detection phase.
    Type: Grant
    Filed: June 29, 2021
    Date of Patent: June 20, 2023
    Assignees: Hefei BOE Joint Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Song Meng, Xuehuan Feng
  • Patent number: 11670234
    Abstract: Embodiments of the present disclosure relate to a display device and a display driving method. Specifically, there may be provided a display driving method including detecting a driving current per block unit, for a display panel where a plurality of subpixels are disposed, scaling driving current data per block unit to driving current data per subpixel unit, calculating first compensation data by comparing the driving current data per subpixel unit with target data, calculating final compensation data by comparing the first compensation data with guide data, and compensating for a characteristic value for the plurality of subpixels based on the final compensation data.
    Type: Grant
    Filed: July 11, 2022
    Date of Patent: June 6, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: SeungHyuck Lee, Seungjong Bong, KiPyo Hong
  • Patent number: 11663970
    Abstract: A display device including a display unit which has a plurality of pixels and a plurality of driving lines for driving the plurality of pixels; a driving circuit which drives the plurality of pixels through the plurality of driving lines; and a control unit which adjusts a driving capability of the driving circuit according to the number of simultaneous driving lines of the driving circuit.
    Type: Grant
    Filed: January 11, 2022
    Date of Patent: May 30, 2023
    Assignee: SATURN LICENSING LLC
    Inventor: Teisuke Kishikawa
  • Patent number: 11645967
    Abstract: A gate driving circuit and a display panel are provided. The gate driving circuit reduces the number of transistors through the inverter in the pull-down maintaining circuit such that the number of the signal output ends connected to the inverter is reduced. In this way, the number of the other transistors in the pull-down maintaining circuit is also reduced. Therefore, the number of the transistors and the number of the signal output ends of the pull-down maintaining circuit are both reduced. This means that the number of the transistors and the number of the signal output ends of the gate driving circuit are both reduced.
    Type: Grant
    Filed: October 23, 2020
    Date of Patent: May 9, 2023
    Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
    Inventor: Suping Xi
  • Patent number: 11640796
    Abstract: Provided is an output control device for providing control signals for a pixel circuit, which includes: a first output device configured to output a first control signal for controlling writing of a data signal into the pixel circuit, and a third output device configured to output a third control signal for controlling resetting of the light emitting element. A frequency of the third control signal is higher than a frequency of the first control signal.
    Type: Grant
    Filed: July 4, 2022
    Date of Patent: May 2, 2023
    Assignees: WUHAN TIANMA MICROELECTRONICS CO., LTD., WUHAN TIANMA MICROELECTRONICS CO., LTD. SHANGHAI BRANCH
    Inventors: Mengmeng Zhang, Yana Gao, Xingyao Zhou
  • Patent number: 11640806
    Abstract: Embodiments of the present disclosure relate to a data driving circuit, a controller and a display device. A display driving is performed by outputting the number of internal data enable signals that is smaller than the number of external data enable signals in the display device performing high-speed driving. As a result, it is possible to prevent an increase in the load of the data driving circuit according to the high-speed driving. In addition, a part of the internal data enable signals is output during a blank period to prevent a decrease in the interval between the internal data enable signals and to increase the number of internal data enable signals. This can improve the image quality displayed on the display panel while preventing an increase in the load on the data driving circuit.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: May 2, 2023
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Jinyoung Oh, JaeYoon Kim, GyuJin Bae
  • Patent number: 11631374
    Abstract: A display device includes a sensing circuit and a controller which selects a pixel row in a frame period. A vertical blank period of the frame period includes a sensing time in which the sensing circuit performs a sensing operation for the selected pixel row. The sensing circuit measures a first source voltage of a driving transistor of a pixel in the selected pixel row at a first time point of the sensing time, and measures a second source voltage of the driving transistor at a second time point of the sensing time. The controller calculates a threshold voltage parameter and a mobility parameter based on the first and second source voltages, predicts a saturated source voltage of the driving transistor based on the threshold voltage parameter and the mobility parameter, and calculates a threshold voltage of the driving transistor based on the saturated source voltage.
    Type: Grant
    Filed: July 27, 2022
    Date of Patent: April 18, 2023
    Assignees: SAMSUNG DISPLAY CO., LTD., SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
    Inventors: Jeonkyoo Kim, Soo Yeon Lee, Manseung Cho, Kyeong Soo Kang, Junhee Moon, Bonghyun You, Jin Kyu Lee