公开(公告)号：US11694624B2

公开(公告)日：2023-07-04

申请号：US17790085

申请日：2021-06-02

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang Wang ,  Fei Yang ,  Yu Wang

IPC: G09G3/3258 ,  G09G3/3233

CPC classification number: G09G3/3258 ,  G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/061 ,  G09G2320/0233 ,  G09G2320/043 ,  G09G2320/045

Abstract: A pixel compensation device includes a controller and at least one external compensation circuit. In the external compensation circuit, a first input circuit is configured to transmit a first voltage to a first terminal of a driving sub-circuit in a initialization phase, perform blanking in a pre-storage phase, and transmit a threshold compensation voltage to the first terminal in the data compensation writing phase; a second input circuit is configured to transmit a second voltage to a control terminal of the driving sub-circuit in the initialization phase and the pre-storage phase, so that a voltage of the first terminal changes from the first voltage to the threshold compensation voltage in the pre-storage phase; a sensing circuit is configured to sense the threshold compensation voltage in the data compensation writing phase; and the controller is configured to transmit a data voltage to the control terminal in the data compensation writing phase.

公开(公告)号：US11289025B2

公开(公告)日：2022-03-29

申请号：US17255104

申请日：2020-05-26

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang Wang ,  Yi Chen ,  Zhan Gao

IPC: G09G3/3258 ,  G09G3/3241

Abstract: A pixel compensation circuit includes: an integration circuit, a comparison circuit, a timing circuit, and a processor, wherein the integration circuit is configured to integrate driving currents of a pixel circuit, and then output a first voltage; the comparison circuit is configured to receive the first voltage, compare the first voltage with a first reference voltage, and then output a first logic control signal; the timing circuit is configured to acquire a first working duration; and the processor is configured to acquire the first working duration, obtain, according to correlations between the pre-obtained working duration and the pixel driving currents, a target driving current, corresponding to the first working duration, of the pixel circuit, and obtain a compensation parameter according to the target driving current.

公开(公告)号：US11025266B2

公开(公告)日：2021-06-01

申请号：US16489150

申请日：2019-03-18

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang Wang ,  Chen Song ,  Zhan Gao ,  Yi Chen

IPC: H03M1/68 ,  G09G3/20 ,  H03M1/76

Abstract: Embodiments of the present disclosure provide a digital-to-analog converter, a conversion circuit and a display device. An M-bit digital-to-analog converter includes a higher M−N-bit digital-to-analog conversion circuit, a voltage conversion circuit, an output circuit. The higher M−N-bit digital-to-analog conversion circuit includes: a higher M−N-bit voltage division generation circuit, a first voltage selection circuit. The first voltage selection circuit selects a first voltage from the higher M−N-bit voltage division generation circuit based on a higher M−N-bit digital signal, to be output from a first voltage end. The voltage conversion circuit charges a capacitor circuit under the control of a first switch circuit and a second switch circuit, and discharges a second voltage to a second voltage end through the capacitor circuit. The output circuit controls the first voltage and the second voltage based on a lower N-bit digital signal, generates an analog voltage signal corresponding to an M-bit digital signal.

公开(公告)号：US10236904B1

公开(公告)日：2019-03-19

申请号：US15987201

申请日：2018-05-23

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang Wang ,  Chen Song

IPC: H03M1/76 ,  G09G3/3225

Abstract: Embodiments of the present application provide a digital-to-analog conversion circuit, a method thereof and a display apparatus. The digital-to-analog conversion circuit comprises a voltage dividing sub-circuit, having 2m of voltage dividing signal terminals and 2n-m−1 of sub-voltage dividing signal terminals; a first voltage selecting sub-circuit, configured to receive the first bit to the (n−m)th bit of the digital signal, and convert it into a first analog signal; a second voltage selecting sub-circuit, configured to receive the (n-m+1)th bit to the nth bit of the digital signal and to convert it into a second analog signal; and a buffering sub-circuit, configured to generate an analog signal based on the first analog signal, the second analog signal and the signal from the ith voltage dividing signal terminal and to output the analog signal to an analog signal outputting terminal of the digital-to-analog conversion circuit.

公开(公告)号：US12183276B2

公开(公告)日：2024-12-31

申请号：US17756697

申请日：2021-04-27

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang Wang ,  Fei Yang

IPC: G09G3/3233

Abstract: A display substrate, a method for driving a display substrate, and a display device are provided. The display substrate includes a plurality of pixel units and a plurality of pixel circuits. The plurality of pixel units are divided into a plurality of groups, and each pixel circuit is configured to drive a corresponding group of pixel units. Each pixel circuit includes a driving circuit, a data writing circuit, a storage circuit, a sensing circuit, and a light-emitting control circuit. The light-emitting control circuit is respectively connected to light-emitting elements of a corresponding group of pixel units, and the light-emitting control circuit is configured to apply a driving current to the light-emitting elements of respective pixel units of the group of pixel units at different times in response to at least two light-emitting control signals.

公开(公告)号：US10916164B2

公开(公告)日：2021-02-09

申请号：US16348315

申请日：2018-08-28

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Chen Song ,  Tangxiang Wang ,  Zhan Gao ,  Song Meng ,  Dongfang Yang

IPC: G09G3/3233 ,  G09G3/00

Abstract: The present disclosure discloses a sampling method, a sampling control method, a sampling device, a sampling control device, a sampling control system, and a display device. The present disclosure provides a sampling method for sampling pixel units disposed on a display substrate, the method including: the controller controlling a plurality of sampling modules to be simultaneously turned on, so that a plurality of sampling modules controlled by the controller are capable of receiving luminance information of the pixel units obtained through sampling of the sampling channel; the controller sequentially controlling a group of sampling channels to be simultaneously turned on, so that the group of sampling channels simultaneously sample the luminance information, and transmit the sampled luminance information to respective sampling modules connected to the group of sampling channels through the output terminals of the group of sampling channels.

公开(公告)号：US10277245B2

公开(公告)日：2019-04-30

申请号：US15736732

申请日：2017-07-03

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang Wang

IPC: H03M1/76 ,  G09G3/3208

Abstract: A digital to analog converter circuit, a display panel and a display device are provided. The digital to analog converter circuit includes a voltage dividing unit, a first segmenting unit, a second segmenting unit and a third segmenting unit.

公开(公告)号：US12046182B2

公开(公告)日：2024-07-23

申请号：US17913782

申请日：2021-11-15

Applicant: BOE Technology Group Co., Ltd.

Inventor： Fei Yang ,  Tangxiang Wang ,  Xiaolong Wei ,  Jingbo Xu ,  Jianbo Xian

IPC: G09G5/18 ,  G09G3/20 ,  G09G3/3225

CPC classification number: G09G3/2096 ,  G09G3/3225 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2320/041 ,  G09G2330/026 ,  G09G2330/027

Abstract: The present disclosure provides a compensation control method and a display device. The method includes in a standstill phase, controlling the display panel to stand still; after the standstill phase ends, sensing, by the timing controller, characteristic values of each row of the pixel circuits in the display panel in a time division manner by controlling the gate driver and the source driver; setting a black insertion time period between time periods for sensing characteristic values of different rows of pixel circuits, during the black insertion time period, controlling, by the timing controller, the gate driver and the source driver, to display a black picture on the display panel.

公开(公告)号：US11961470B2

公开(公告)日：2024-04-16

申请号：US17771946

申请日：2021-06-03

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Fei Yang ,  Tangxiang Wang

IPC: G09G3/3233 ,  G09G3/20 ,  G09G3/3266

CPC classification number: G09G3/3233 ,  G09G3/2096 ,  G09G3/3266 ,  G09G2300/0828 ,  G09G2300/0842 ,  G09G2310/0291 ,  G09G2310/08 ,  G09G2320/043 ,  G09G2360/14 ,  G09G2360/16

Abstract: A sensing circuit and a correction method thereof, a pixel driving module and a sensing method thereof, and a display apparatus, the sensing circuit includes: an operation amplifier (AMP), an integration capacitor (Cfb), a first switch (S1), a second switch (S2), a third switch (S3), a fourth switch (S4), a fifth switch (S5) and a sixth switch (S6).

公开(公告)号：US10943536B2

公开(公告)日：2021-03-09

申请号：US16441064

申请日：2019-06-14

Applicant: BOE Technology Group Co., Ltd.

Inventor： Tangxiang Wang ,  Chen Song

IPC: G09G3/3233

Abstract: Provided are an external compensation circuit and method, and display device in the field of display techniques. The external compensation circuit includes a regulation sub-circuit that may collect a driving current loaded to a light-emitting unit and a reference current from a reference current source, and regulate potentials at two nodes connected to a compensation sub-circuit according to the collected current, to enable the compensation sub-circuit to calibrate a data signal to be input to a pixel circuit according to a potential difference between the two nodes.