Patents by Inventor Quanhu LI

Quanhu LI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11342037
    Abstract: The present disclosure provides a shift register unit, a driving method, a light emitting control gate driving circuit, and a display apparatus. The shift register unit includes: a light emitting control signal output terminal, a pull-up control node control circuit, N stages of inversion control circuits, a pull-up node control circuit, a pull-down node control circuit, and an output circuit, where N is an integer greater than 1. A first stage of inversion control circuit is configured to invert an input signal. An nth stage of inversion control circuit inverts the input signal under control of an (n?1)th inversion node, where n is an integer and 2?n?N.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: May 24, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Quanhu Li
  • Patent number: 11257957
    Abstract: The present disclosure provides a thin film transistor, a method of fabricating the same, an array substrate and a display device. The thin film transistor includes: source and drain electrodes in a same layer arranged on a base substrate; an active layer on the base substrate and in contact with the source and drain electrodes; a gate insulating layer at a side of the active layer away from the base substrate; a gate electrode at a side of the gate insulating layer away from the base substrate. Orthographic projections of the gate electrode, the source electrode and the drain electrode on the base substrate do not overlap with one another, and a region of the active layer not covered by the gate electrode, the source electrode and the drain electrode and at a side of the active layer away from the base substrate is subjected to conductorization.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: February 22, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Pan Xu, Yicheng Lin, Cuili Gai, Baoxia Zhang, Quanhu Li, Ling Wang
  • Patent number: 11217160
    Abstract: A pixel circuit includes a data writing sub-circuit inputs a signal input via a second signal terminal to a compensating sub-circuit and a driving sub-circuit under control of a signal from a first signal terminal, the compensating sub-circuit compensates a threshold voltage of the driving sub-circuit according to a signal output from the data writing sub-circuit under control of a signal from a third signal terminal, a light-emitting control sub-circuit inputs a signal from a first voltage terminal to the driving sub-circuit and the compensating sub-circuit under control of a signal from a fourth signal terminal, the driving sub-circuit configured to generate and input a driving current to a light-emitting sub-circuit according to a signal output from the light-emitting control sub-circuit and a signal output from the data writing sub-circuit, and the light-emitting sub-circuit configured to emit light according to the driving current under control of a second voltage terminal.
    Type: Grant
    Filed: August 16, 2018
    Date of Patent: January 4, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Cuili Gai, Yicheng Lin, Baoxia Zhang, Ling Wang, Quanhu Li, Pan Xu
  • Patent number: 11205381
    Abstract: A display panel, a display device and a compensation method are provided. The display panel includes at least one pixel unit group, at least one sensing line, a plurality of gate lines, a plurality of first data lines and a plurality of second data lines. Each pixel unit group includes a plurality of pixel units arranged in two rows and a plurality of columns, the plurality of pixel units in each pixel unit group are connected to a same one of the gate lines, one of two pixel units in each column of each pixel unit group is connected to one of the first data lines corresponding thereto, other one is connected to one of the second data lines corresponding thereto, the plurality of pixel units in each pixel unit group are connected to a same sensing line.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 21, 2021
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Yi Cheng Lin, Quanhu Li, Cuili Gai, Ling Wang, Baoxia Zhang
  • Patent number: 11189228
    Abstract: A pixel circuit, a method for driving a pixel circuit, and a display device are provided. The pixel circuit includes: a storage circuit, a data writing circuit, a light emitting driving circuit, and a compensation circuit. The data writing circuit is configured to write a data voltage to the storage circuit under control of a scanning control signal; the storage circuit is configured to store the data voltage and enable a stored data voltage to be available to the compensation circuit for a compensation operation; the compensation circuit is configured to maintain a compensation voltage based on the stored data voltage at a control terminal of the light emitting driving circuit under control of a compensation control signal; and the light emitting driving circuit configured to drive the light emitting element to emit light under control of the compensation voltage.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: November 30, 2021
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Quanhu Li, Yongfu Diao, Wenkang Wang, Zhongliu Yang, Mingjing Yang
  • Patent number: 11170718
    Abstract: A display panel, a display device, and a compensating method are disclosed. The display panel includes: a plurality of sub-pixels arranged in rows and columns, a plurality of data lines connected to the plurality of sub-pixels, and a plurality of sensing driving lines connected to the plurality of sub-pixels, each of plurality of the sub-pixels includes a pixel circuit; the plurality of sub-pixels constitute a plurality of pixel units, the plurality of pixel units are arranged in a plurality of rows and a plurality of columns, and each of the plurality of pixel units includes four sub-pixels; pixel circuits of the four sub-pixels are connected to a same data line of the plurality of data lines; and the pixel circuits of the four sub-pixels are connected to four sensing driving lines of the plurality of sensing driving lines in a one-to-one correspondence manner.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: November 9, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yi Cheng Lin, Quanhu Li, Cuili Gai, Yu Wang, Mingi Chu, Chien Pang Huang
  • Publication number: 20210335255
    Abstract: The present disclosure provides a shift register unit, a driving method, a light emitting control gate driving circuit, and a display apparatus. The shift register unit includes: a light emitting control signal output terminal, a pull-up control node control circuit, N stages of inversion control circuits, a pull-up node control circuit, a pull-down node control circuit, and an output circuit, where N is an integer greater than 1. A first stage of inversion control circuit is configured to invert an input signal. An nth stage of inversion control circuit inverts the input signal under control of an (n?1)th inversion node, where n is an integer and 2?n?N.
    Type: Application
    Filed: March 5, 2019
    Publication date: October 28, 2021
    Inventor: Quanhu Li
  • Patent number: 11127350
    Abstract: A pixel circuit includes a first transistor having a bottom gate and a top gate, a drain supplied with a high-level power-supply voltage, and a source coupled to a light-emitting diode (LED). The bottom gate is provided with a first voltage signal and the source is provided with a second voltage signal in a compensation period during which a present value of a threshold voltage of the first transistor is sensed at the source and a third voltage signal is determined based on the present value of the threshold voltage. The top gate is configured to be provided with the third voltage signal in an emission period to reduce the present value of the threshold voltage.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: September 21, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Cuili Gai, Zhongyuan Wu, Baoxia Zhang, Ling Wang, Yicheng Lin, Quanhu Li, Fang Liu
  • Patent number: 11120720
    Abstract: A shift register unit and a method for driving the same, a gate driver including the same, a display panel and a display device. The shift register unit includes an input terminal, a first voltage terminal, a second voltage terminal, a first clock signal terminal, a second clock signal terminal, an adjustment terminal, an output terminal, a transfer terminal, an input circuit, a first control circuit, and an output circuit. The shift register unit avoids unstableness of the output signal caused by abnormal leakage of charges during the normal output by providing an adjustment signal, and separates the output signal from the transfer signal by means of the output terminal and the transfer terminal, which can reduce the sizes of transistors connected to the output terminal and the transfer terminal, thereby saving the layout area of the shift register unit and decreasing the power consumption thereof at the same time.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: September 14, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Quanhu Li
  • Patent number: 11087688
    Abstract: Embodiments of the present disclosure provide a driving method for a pixel circuit. The pixel circuit includes a light emitting device and a drive transistor. The method includes: compensating the drive transistor in a first compensation manner including an internal voltage compensation during an operation period of the light emitting device; and compensating the drive transistor in a second compensation manner including the internal voltage compensation and an external voltage compensation during a non-operation period of the light emitting device.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: August 10, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yi-Cheng Lin, Guang Yan, Quanhu Li, Mingi Chu
  • Publication number: 20210210013
    Abstract: A pixel circuit and a driving method, a display panel and a display device are provided. The pixel circuit includes a data writing circuit, a compensation control circuit, a storage circuit, a light-emitting control circuit, and a drive circuit. The current output by the drive circuit in the pixel circuit of the present disclosure is only related to the data voltage of the data signal terminal and the reference voltage, and is independent of the threshold voltage of the drive circuit and the voltage of the second power terminal.
    Type: Application
    Filed: February 23, 2018
    Publication date: July 8, 2021
    Applicant: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yi Cheng LIN, Pan XU, Baoxia ZHANG, Quanhu LI, Ling WANG, Cuili GAI
  • Publication number: 20210201790
    Abstract: The present application discloses a pixel circuit in an active matrix organic light-emitting diode (AMOLED) display panel. The pixel circuit includes a first transistor having a bottom gate and a top gate, a drain supplied with a high-level power-supply voltage, and a source coupled to a light-emitting diode (LED). The bottom gate is provided with a first voltage signal and the source is provided with a second voltage signal in a compensation period during which a present value of a threshold voltage of the first transistor is sensed at the source and a third voltage signal is determined based on the present value of the threshold voltage. The top gate is configured to be provided with the third voltage signal in an emission period to reduce the present value of the threshold voltage.
    Type: Application
    Filed: August 2, 2017
    Publication date: July 1, 2021
    Applicant: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Cuili Gai, Zhongyuan Wu, Baoxia Zhang, Ling Wang, Yicheng Lin, Quanhu Li, Fang Liu
  • Publication number: 20210166623
    Abstract: A pixel circuit includes a data writing sub-circuit inputs a signal input via a second signal terminal to a compensating sub-circuit and a driving sub-circuit under control of a signal from a first signal terminal, the compensating sub-circuit compensates a threshold voltage of the driving sub-circuit according to a signal output from the data writing sub-circuit under control of a signal from a third signal terminal, a light-emitting control sub-circuit inputs a signal from a first voltage terminal to the driving sub-circuit and the compensating sub-circuit under control of a signal from a fourth signal terminal, the driving sub-circuit configured to generate and input a driving current to a light-emitting sub-circuit according to a signal output from the light-emitting control sub-circuit and a signal output from the data writing sub-circuit, and the light-emitting sub-circuit configured to emit light according to the driving current under control of a second voltage terminal.
    Type: Application
    Filed: August 16, 2018
    Publication date: June 3, 2021
    Inventors: Cuili GAI, Yicheng LIN, Baoxia ZHANG, Ling WANG, Quanhu LI, Pan XU
  • Patent number: 11011118
    Abstract: The present application discloses a pixel-driving circuit in a display panel. The pixel-driving circuit includes a first transistor being provided with a fixed voltage, a driving transistor having a gate configured to receive the fixed voltage controlled by the first transistor and a drain coupled to a first power supply, a capacitor coupled between the gate and a source of the driving transistor, a light-emitting device coupled to the source and a second power supply, a second transistor having a drain coupled to the source of the driving transistor and a source coupled to a data line, a sensing sub-circuit coupled to the data line in a first period, and a driving sub-circuit coupled to the data line in a second period. The sensing sub-circuit and the driving sub-circuit are configured to connect to the data line in a time-divisional manner respectively for sensing and compensating the pixel-driving circuit.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: May 18, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yicheng Lin, Quanhu Li, Guang Yan, Yu Wang, Cuili Gai, Mingi Chu
  • Patent number: 10978524
    Abstract: An electroluminescent display substrate and a manufacturing method thereof, a display panel and a display apparatus are disclosed. The electroluminescent display substrate includes: a base substrate including a display area and a peripheral area surrounding the display area, wherein at least one OLED device is in the display area; a pixel defining layer in the display area and the peripheral area; at least one groove in the pixel defining layer in the peripheral area; wherein the at least one OLED device has a first electrode, the first electrode is on a side of the pixel defining layer away from the base substrate and extends to cover the groove.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: April 13, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Cuili Gai, Yi Cheng Lin, Pan Xu, Baoxia Zhang, Quanhu Li, Ling Wang
  • Publication number: 20210065624
    Abstract: A pixel circuit, a method for driving a pixel circuit, and a display device are provided. The pixel circuit includes: a storage circuit, a data writing circuit, a light emitting driving circuit, and a compensation circuit. The data writing circuit is configured to write a data voltage to the storage circuit under control of a scanning control signal; the storage circuit is configured to store the data voltage and enable a stored data voltage to be available to the compensation circuit for a compensation operation; the compensation circuit is configured to maintain a compensation voltage based on the stored data voltage at a control terminal of the light emitting driving circuit under control of a compensation control signal; and the light emitting driving circuit configured to drive the light emitting element to emit light under control of the compensation voltage.
    Type: Application
    Filed: June 5, 2019
    Publication date: March 4, 2021
    Applicant: BOE Technology Group Co., Ltd.
    Inventors: Quanhu Li, Yongfu Diao, Wenkang Wang, Zhongliu Yang, Mingjing Yang
  • Patent number: 10937351
    Abstract: A Gamma-curve correction method for a display apparatus, and a display apparatus. The method includes: determining a standard Gamma curve according to the display apparatus; selecting a plurality of test gray scale values on the standard Gamma curve, and acquiring a plurality of target brightness values corresponding to the plurality of test gray scale values; adjusting an input gray scale value of the display apparatus to obtain a plurality of test-correction gray scale values, where the test-correction gray scale values are corresponding input gray scale values when display brightness of the display apparatus is equal to respective target brightness; generating an association relationship between input gray scale values and correction gray scale values, according to the plurality of test gray scale values and the plurality of test-correction gray scale values; and adjusting the input gray scale value to a corresponding correction gray scale value, according to the association relationship.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: March 2, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Song Meng, Quanhu Li
  • Publication number: 20200402475
    Abstract: A display panel and a display device are disclosed, the display panel includes: a plurality of pixel units arranged in an array in a display area, and a gate drive circuit arranged at least in the display area, where the gate drive circuit includes a plurality of shift register elements connected in cascade, each level of the plurality of shift register elements is connected respectively with a row of the plurality of pixel units, and each level of the plurality of shift register elements includes at least three shift register sub-circuits in the display area.
    Type: Application
    Filed: February 14, 2018
    Publication date: December 24, 2020
    Applicant: BOE Technology Group Co., Ltd.
    Inventor: Quanhu LI
  • Patent number: 10861926
    Abstract: The present disclosure is related to a display substrate. The display substrate may include a plurality of pixel units. Each of the plurality of the pixel units may include a first electrode and a second electrode on a base substrate. At least one of the pixel units further comprises an auxiliary electrode and a connecting structure between the auxiliary electrode and the first electrode. The connecting structure may be configured to electrically connect the auxiliary electrode to the first electrode.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: December 8, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Cuili Gai, Ling Wang, Yicheng Lin, Baoxia Zhang, Pan Xu, Quanhu Li
  • Patent number: 10818207
    Abstract: A circuitry and a method for detecting a failed pixel, and a display device are provided. The circuitry for detecting the failed pixel includes a display control circuit and a failed pixel detection circuit. The display control circuit is connected to a pixel driving circuit, and configured to control, at detection voltage write-in stage and failed pixel detection stage, the pixel driving circuit to cause light-emitting element not to emit light. The failed pixel detection circuit is connected to first electrode of the light-emitting element via failure sense line, and configured to apply a reference voltage to the first electrode of the light-emitting element via the failure sense line at the detection voltage write-in stage, detect a potential at the first electrode of the light-emitting element at the failed pixel detection stage, and determine, in accordance with the potential, whether the pixel circuit is failed.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: October 27, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yongqian Li, Pan Xu, Quanhu Li