Patents by Inventor Yongfu Diao

Yongfu Diao 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: 11296171
    Abstract: A display substrate and a display device are provided. The display substrate includes sub-pixels and a light emitting control signal line. The sub-pixel includes an organic light emitting element and a pixel circuit, the organic light emitting element includes a second electrode, the pixel circuit includes a driving transistor and a first light emitting control transistor, and the pixel circuit further includes a connection structure. In the second color sub-pixel, a first electrode of the first light emitting control transistor is electrically connected with the connection structure through a first connection hole, and the connection structure is electrically connected with the second electrode through a second connection hole, the first connection hole and the second connection hole are located on both sides of the light emitting control signal line. In the third color sub-pixel, the second electrode does not overlap with a channel of the driving transistor.
    Type: Grant
    Filed: November 27, 2020
    Date of Patent: April 5, 2022
    Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xin Mou, Yongfu Diao
  • Publication number: 20220044636
    Abstract: A display substrate and a display device are provided. The display substrate includes a base substrate and sub-pixels on the base substrate, a sub-pixel includes an organic light emitting element and a pixel circuit, the organic light emitting element includes a first electrode, a light emitting layer and a second electrode which are stacked, the second electrode is electrically connected to the pixel circuit. The display substrate further includes an active semiconductor layer, a first conductive layer, a second conductive layer, a source-drain metal layer, and a third conductive layer, the source-drain metal layer includes a first power signal line, and the third conductive layer includes a second power signal line; the display substrate further includes reset power signal lines, the reset power signal lines include a first reset power signal line and a second reset power signal line which are electrically connected to the pixel circuit.
    Type: Application
    Filed: October 20, 2021
    Publication date: February 10, 2022
    Inventors: Xin Mou, Yongfu Diao
  • Patent number: 11232755
    Abstract: A display substrate and a manufacturing method therefor, and a display device are provided. The display substrate includes a base substrate, a plurality of sub-pixels, a plurality of data lines, a plurality of data lead lines, at least one group of contact pads, and a first insulation layer. The base substrate includes a display region and a bonding region; the data lines are configured to provide data signals to the sub-pixels; the data lead lines are electrically connected to the data lines, respectively; the at least one group of contact pads includes a first group of contact pads and a second group of contact pads; the first insulation layer is in gaps between the contact pads and covers edges of the contact pads, and is configured to expose surfaces, away from the base substrate, of the contact pads.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: January 25, 2022
    Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Zhongliu Yang, Yudan Shui, Yongfu Diao, Wenkang Wang, Chenyu Chen
  • Publication number: 20210376026
    Abstract: A display substrate and a display device are provided. The display substrate includes sub-pixels and a light emitting control signal line. The sub-pixel includes an organic light emitting element and a pixel circuit, the organic light emitting element includes a second electrode, the pixel circuit includes a driving transistor and a first light emitting control transistor, and the pixel circuit further includes a connection structure. In the second color sub-pixel, a first electrode of the first light emitting control transistor is electrically connected with the connection structure through a first connection hole, and the connection structure is electrically connected with the second electrode through a second connection hole, the first connection hole and the second connection hole are located on both sides of the light emitting control signal line. In the third color sub-pixel, the second electrode does not overlap with a channel of the driving transistor.
    Type: Application
    Filed: November 27, 2020
    Publication date: December 2, 2021
    Applicants: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xin MOU, Yongfu DIAO
  • 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
  • Publication number: 20210366393
    Abstract: A display substrate and a display device are provided. The display substrate includes a base and subpixels. The subpixel includes: a data line pattern; a power source signal line pattern including a portion extending in the first direction; and a subpixel driving circuitry. The subpixel driving circuitry includes two switching transistors, a driving transistor, and a storage capacitor. First and second electrode plates of the storage capacitor are coupled to a gate electrode of the driving transistor and the power source signal line pattern respectively. Second electrodes of the two switching transistors are coupled to a first electrode of the driving transistor. An orthogonal projection of the second electrode of at least one of the switching transistors onto the base at least partially overlaps an orthogonal projection of the power source signal line pattern onto the base, and at least partially overlaps an orthogonal projection of the second electrode plate of the storage capacitor onto the base.
    Type: Application
    Filed: November 27, 2020
    Publication date: November 25, 2021
    Inventors: Yongfu DIAO, Chenyu CHEN
  • Publication number: 20210366941
    Abstract: A display substrate, a method of forming the same, a display panel and a display device are provided. The display substrate includes a thin film transistor array layer, where a semiconductor material layer pattern of a driving transistor in the thin film transistor array layer includes a first channel portion, and the first channel portion includes a first sub-channel portion. and a second sub-channel portion; the semiconductor material layer pattern further includes a first conductive portion, an included angle between a straight line where a current conduction direction of the first sub-channel portion is located and a straight line Where an extending, direction of a data line in the thin film transistor array layer is located is a first included angle.
    Type: Application
    Filed: October 22, 2019
    Publication date: November 25, 2021
    Applicants: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yongfu DIAO, Wenkang WANG, Zhongliu YANG, Chenyu CHEN
  • Publication number: 20210335989
    Abstract: A display substrate, a method of forming a display substrate and a display device are provided.
    Type: Application
    Filed: November 29, 2019
    Publication date: October 28, 2021
    Inventors: Yongfu DIAO, Chenyu CHEN, Biao XU
  • Publication number: 20210193780
    Abstract: A display substrate includes a substrate and a plurality of sub-pixels arranged in an array on the substrate. The sub-pixel includes: a data line pattern extending along a first direction; a power signal line pattern, the power signal line pattern including a portion extending along the first direction: and a sub-pixel driving circuit. The sub-pixel driving circuit includes two switching transistors, a driving transistor, and a storage capacitor; a first/second electrode plate of the storage capacitor is coupled to a gate electrode of the driving transistor the power signal line pattern, second electrodes of the two switching transistors are both coupled to a first electrode of the driving transistor, and orthographic projection of a second electrode of at least one of the two switching transistors on the substrate at least partially overlaps orthographic projection of the power signal line pattern or the second electrode plate on the substrate.
    Type: Application
    Filed: November 29, 2019
    Publication date: June 24, 2021
    Applicants: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yongfu DIAO, Chenyu CHEN
  • Publication number: 20210125566
    Abstract: A display substrate and a manufacturing method therefor, and a display device are provided. The display substrate includes a base substrate, a plurality of sub-pixels, a plurality of data lines, a plurality of data lead lines, at least one group of contact pads, and a first insulation layer. The base substrate includes a display region and a bonding region; the data lines are configured to provide data signals to the sub-pixels; the data lead lines are electrically connected to the data lines, respectively; the at least one group of contact pads includes a first group of contact pads and a second group of contact pads; the first insulation layer is in gaps between the contact pads and covers edges of the contact pads.
    Type: Application
    Filed: October 23, 2019
    Publication date: April 29, 2021
    Inventors: Zhongliu YANG, Yudan SHUI, Yongfu DIAO, Wenkang WANG, Chenyu CHEN
  • 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