公开(公告)号：US20210225962A1

公开(公告)日：2021-07-22

申请号：US16632184

申请日：2018-11-20

Applicant: BOE Technology Group Co., Ltd.

Inventor： Ling Wang ,  Xue Dong ,  Yicheng Lin ,  Cuili Gai ,  Pan Xu

IPC: H01L27/32 ,  H01L51/52 ,  H01L51/56

Abstract: A display substrate includes a base substrate; and a plurality of light emitting brightness value detectors on the base substrate. Each of the plurality of light emitting brightness value detectors includes a first thin film transistor; a protection layer on a side of the first thin film transistor away from the base substrate; and a photosensor electrically connected to the first thin film transistor and configured to detect alight emitting brightness value. An orthographic projection of the protection layer on the base substrate covers an orthographic projection of at least a channel part of the first thin film transistor on the base substrate.

公开(公告)号：US10977992B2

公开(公告)日：2021-04-13

申请号：US16624276

申请日：2018-11-30

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Yicheng Lin ,  Yu Wang ,  Ling Wang ,  Pan Xu ,  Cuili Gai ,  Baoxia Zhang ,  Guang Yan ,  Dongfang Yang

IPC: G09G3/3233

Abstract: A driving compensation method for a pixel circuit includes: in a compensation phase of the pixel circuit, providing a preset signal to the control terminal of the driving transistor to write the preset signal to the control terminal of the driving transistor, to write internal loss voltage of the driving transistor to the first terminal of the driving transistor; wherein the compensation phase includes a first external compensation phase and a second external compensation phase; in the first external compensation phase, the preset signal is a sum of a reference signal and a threshold voltage of the driving transistor; in the second external compensation phase, the preset signal is the sum of the data signal and the threshold voltage of the driving transistor.

公开(公告)号：US20200381524A1

公开(公告)日：2020-12-03

申请号：US16613690

申请日：2019-05-20

Applicant: BOE Technology Group Co., Ltd.

Inventor： Pan Xu ,  Yicheng Lin ,  Cuili Gai ,  Ling Wang ,  Yongqian Li

IPC: H01L29/417 ,  H01L27/12 ,  H01L27/32 ,  H01L29/786 ,  H01L29/66

Abstract: Embodiments of the present disclosure provide a thin film transistor, a method of manufacturing the same, and a display device. The thin film transistor includes a metal conductive pattern layer, an interlayer insulating layer, and a metal oxide layer; and the metal conductive pattern layer includes: a light shielding pattern, a source signal line, and/or a drain signal line; the metal oxide layer includes: a source electrode, a drain electrode, and an active layer. An orthographic projection of the active layer on the base substrate has an overlapping region with that of the light shielding pattern; the source electrode extends through the interlayer insulating layer to connect to the source signal line, and/or the drain electrode extends through the interlayer insulating layer to connect to the drain signal line.

公开(公告)号：US10818236B2

公开(公告)日：2020-10-27

申请号：US16118192

申请日：2018-08-30

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Cuili Gai ,  Baoxia Zhang ,  Ling Wang ,  Pan Xu ,  Yicheng Lin

IPC: G09G3/3258 ,  G09G3/3233

Abstract: The present disclosure relates to a display device, a display substrate, a method and a device for display compensation. The method includes: before displaying an image, performing initial compensation on each of the pixel circuits to obtain an average reference voltage of the plurality of pixel circuits; controlling the display substrate to display an image and performing external compensation on each of the pixel circuits during a display duration of one frame of the image, obtaining a charging voltage on the sensing line of each of the pixel circuits during the external compensation, obtaining a first reference voltage of each of the pixel circuits according to the charging voltage on the sensing line and the average reference voltage, and performing internal compensation on each of the pixel circuits according to the first reference voltage.

公开(公告)号：US10818207B2

公开(公告)日：2020-10-27

申请号：US16086675

申请日：2018-03-02

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Yongqian Li ,  Pan Xu ,  Quanhu Li

IPC: G09G3/00 ,  G09G3/30

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.

公开(公告)号：US10803803B2

公开(公告)日：2020-10-13

申请号：US15869625

申请日：2018-01-12

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Pan Xu

IPC: G09G3/3258 ,  H01L51/52 ,  G09G3/3233 ,  H01L51/00 ,  G09G3/00

Abstract: An organic light emitting diode pixel compensation method, an organic light emitting diode pixel compensation device and a display device are provided. The organic light emitting diode pixel compensation method includes: testing drive transistors of sub-pixels in an Nth row to obtain first test information; testing drive transistors of sub-pixels in an Mth row to obtain second test information; calculating a compensation parameter based on the first test information and the second test information; and compensating the sub-pixels in the Nth row, the sub-pixels in the Mth row and the sub-pixels in a rows adjacent to the Nth row and the Mth row based on the compensation parameter, where N=an+b, M=an+c, a≥2, 0≤b

公开(公告)号：US10762844B2

公开(公告)日：2020-09-01

申请号：US16096796

申请日：2018-01-17

Applicant: BOE Technology Group Co., Ltd.

Inventor： Yongqian Li ,  Pan Xu ,  Quanhu Li

IPC: G09G5/00 ,  G09G3/3258

Abstract: The present application provides a pixel driving circuit, including a driving sub-circuit, a compensation sub-circuit, a first switching sub-circuit, and a second switching sub-circuit. The driving sub-circuit has a control terminal electrically connected to a first terminal of the second switching sub-circuit, a first terminal electrically connected to a light-emitting element, and a second terminal electrically connected to a power source; the compensation sub-circuit has a first terminal electrically connected to the first terminal of the driving sub-circuit, and a second terminal electrically connected to the control terminal of the driving sub-circuit; the first switching sub-circuit has a control terminal electrically connected to a first signal input terminal, a first terminal electrically connected to the first terminal of the driving sub-circuit, and a second terminal electrically connected to an initial voltage input terminal; and the second switching sub-circuit has a control terminal electrically connected to a second signal input terminal, a first terminal electrically connected to the control terminal of the driving sub-circuit, and a second terminal electrically connected to a data signal input terminal.

公开(公告)号：US10699643B2

公开(公告)日：2020-06-30

申请号：US16334114

申请日：2018-01-04

Applicant: Hefei Xinsheng Optoelectronics Technology Co., Ltd. ,  BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Can Yuan ,  Zhidong Yuan ,  Yongqian Li ,  Pan Xu ,  Wenchao Bao ,  Min He

IPC: G09G3/3233 ,  G09G3/3258 ,  G09G3/3275

Abstract: The present disclosure relates to a pixel driving compensation circuit. The pixel driving compensation circuit can detect and compensate a driving current of a sub-pixel in a pixel unit. The pixel unit includes first, second, and third sub-pixels and the first to third sub-pixels respectively include first, second, and third driving transistors. The pixel driving compensation circuit includes a first switching sub-circuit configured to be turned on in a first period to transmit a driving current output from the first driving transistor to a first detection line, second switching sub-circuit configured to be turned on in a second period to transmit a driving current output from the second driving transistor to a first detection line, and a third switching sub-circuit configured to be turned on in the first period to transmit a driving current output from the third driving transistor to a second detection line.

公开(公告)号：US10553154B2

公开(公告)日：2020-02-04

申请号：US15744381

申请日：2017-06-30

Applicant: BOE Technology Group Co., Ltd.

Inventor： Yongqian Li ,  Pan Xu ,  Zhidong Yuan

IPC: G09G3/3233 ,  G09G3/00 ,  G09G3/3266

Abstract: A method and an apparatus for detecting a driving circuit. The method includes: inputting a data signal, a gate line scanning signal, a voltage signal, and a first control signal with a first voltage level into a data input end, a gate scanning input end, a power source end and a voltage sensing end of the driving circuit, respectively; by inputting a second control signal with a second voltage level into a sensing-scanning input end, controlling a pixel storage capacitor to be charged, and measuring a first voltage of an OLED anode end; by inputting the second control signal with a third voltage level to the sensing-scanning input end, controlling the pixel storage capacitor to be discharged, and measuring a second voltage of the OLED anode end; and determining whether the driving circuit has abnormity or not according to the first voltage and the second voltage.

公开(公告)号：US20190371245A1

公开(公告)日：2019-12-05

申请号：US16334114

申请日：2018-01-04

Applicant: Hefei Xinsheng Optoelectronics Technology Co., Ltd ,  BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Can Yuan ,  Zhidong Yuan ,  Yongqian Li ,  Pan Xu ,  Wenchao Bao ,  Min He

IPC: G09G3/3258 ,  G09G3/3233 ,  G09G3/3275

Abstract: The present disclosure relates to a pixel driving compensation circuit. The pixel driving compensation circuit can detect and compensate a driving current of a sub-pixel in a pixel unit. The pixel unit includes first, second, and third sub-pixels and the first to third sub-pixels respectively include first, second, and third driving transistors. The pixel driving compensation circuit includes a first switching sub-circuit configured to be turned on in a first period to transmit a driving current output from the first driving transistor to a first detection line, second switching sub-circuit configured to be turned on in a second period to transmit a driving current output from the second driving transistor to a first detection line, and a third switching sub-circuit configured to be turned on in the first period to transmit a driving current output from the third driving transistor to a second detection line.