Patents by Inventor Wenchao Bao

Wenchao Bao 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: 11887683
    Abstract: The present disclosure provides a shift register unit, a driving method, a gate driving circuit and a display device. The shift register unit includes a pull-down node control circuit; the pull-down node control circuit is electrically connected to an input terminal, a reset terminal, a first voltage terminal, a second voltage terminal and a pull-down node, respectively, and is configured to, under the control of an input signal provided by the input terminal and a reset signal provided by the reset terminal, control the pull-down node to be electrically conducted to the first voltage terminal or the second voltage terminal, and control to hold a potential of the pull-down node.
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: January 30, 2024
    Assignees: Hefei BOE Joint Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Zhidong Yuan, Yongqian Li, Can Yuan, Wenchao Bao
  • Patent number: 11749201
    Abstract: The present disclosure provides a display device and a circuit and method for acquiring voltages, and belongs to the field of display technologies. The display device includes: a display panel including a plurality of sub-pixels and a plurality of sensing lines, each of the sub-pixels being connected to one of the sensing lines; a reference voltage providing circuit configured to provide a reference voltage; a sampling circuit electrically connected to the sensing lines and the reference voltage providing circuit, respectively, and configured to acquire a voltage on each sensing line to obtain a first sampling value, and acquire the reference voltage provided by the reference voltage providing circuit to obtain a second sampling value; and a processing circuit electrically connected to the sampling circuit, and configured to correct the first sampling value based on the second sampling value and the reference voltage.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: September 5, 2023
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD, BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Taejin Kim, Wenchao Bao
  • Publication number: 20230260586
    Abstract: The present disclosure provides a shift register unit, a driving method, a gate driving circuit and a display device. The shift register unit includes a pull-down node control circuit; the pull-down node control circuit is electrically connected to an input terminal, a reset terminal, a first voltage terminal, a second voltage terminal and a pull-down node, respectively, and is configured to, under the control of an input signal provided by the input terminal and a reset signal provided by the reset terminal, control the pull-down node to be electrically conducted to the first voltage terminal or the second voltage terminal, and control to hold a potential of the pull-down node.
    Type: Application
    Filed: December 29, 2020
    Publication date: August 17, 2023
    Inventors: Zhidong YUAN, Yongqian LI, Can YUAN, Wenchao BAO
  • Patent number: 11645978
    Abstract: The present disclosure provides method and device for processing compensation data to be applied to a pixel circuit, and a display panel. The method includes: receiving M compensation data; determining a first threshold range according to (i?N)-th to (i?1)-th standard data, wherein midpoint and length of the first threshold range both depend on the (i?N)-th to (i?1)-th standard data; judging whether an i-th compensation data is in the first threshold range or not; in response to the i-th compensation data being in the first threshold range, determining the i-th compensation data as qualified and using it as an i-th standard data; and in response to the i-th compensation data not being in the first threshold range, determining the i-th compensation data as unqualified, replacing it with an average value of the (i?N)-th to (i?1)-th standard data, and using the replaced i-th compensation data as the i-th standard data.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: May 9, 2023
    Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Wenchao Bao, Xiaolong Wei
  • Publication number: 20220328006
    Abstract: The present disclosure provides a display device and a circuit and method for acquiring voltages, and belongs to the field of display technologies. The display device includes: a display panel including a plurality of sub-pixels and a plurality of sensing lines, each of the sub-pixels being connected to one of the sensing lines; a reference voltage providing circuit configured to provide a reference voltage; a sampling circuit electrically connected to the sensing lines and the reference voltage providing circuit, respectively, and configured to acquire a voltage on each sensing line to obtain a first sampling value, and acquire the reference voltage provided by the reference voltage providing circuit to obtain a second sampling value; and a processing circuit electrically connected to the sampling circuit, and configured to correct the first sampling value based on the second sampling value and the reference voltage.
    Type: Application
    Filed: October 28, 2020
    Publication date: October 13, 2022
    Inventors: Taejin Kim, Wenchao Bao
  • Publication number: 20220284853
    Abstract: A display module includes a display panel, a power supply driver, a voltage signal line, a sampling resistor and a detection and control circuit. The voltage signal line is connected between the display panel and the power supply driver. The sampling resistor is connected in series with the voltage signal line. The detection and control circuit is connected to two ends of the sampling resistor and the power supply driver. The detection and control circuit is configured to: detect a voltage across the sampling resistor or a current flowing through the sampling resistor; and control the power supply driver to generate a driving voltage equal to a preset value lower than a voltage threshold, if determining that the voltage across the sampling resistor is greater than or equal to the voltage threshold, or if determining that the current is greater than or equal to a current threshold.
    Type: Application
    Filed: March 22, 2022
    Publication date: September 8, 2022
    Applicants: Hefei BOE Joint Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Wenchao BAO, Song MENG, Min HE, Huihui LI
  • Publication number: 20220269123
    Abstract: The present disclosure provides a chip on film and a display device. The chip on film includes: a first end, wherein a first row of bonding terminals and a second row of bonding terminals are arranged on a first surface of the first end, the first row of bonding terminals and the second row of bonding terminals are spaced apart and insulated from each other, and the first row of bonding terminals is closer to a center of the chip on film than the second row of bonding terminals; and a plurality of leads, extending in a second direction and including a first part and a second part. A first end section of each lead of the first part serves as one of the first row of bonding terminals, a first end section of each lead of the second part serves as one of the second row of bonding terminals.
    Type: Application
    Filed: September 17, 2021
    Publication date: August 25, 2022
    Inventors: Huihui LI, Wenchao BAO, Song MENG
  • Patent number: 11393394
    Abstract: A compensation method and a compensation apparatus for an organic light-emitting display, and a display device are disclosed. The compensation method includes: determining a write-back voltage of each sub-pixel to be compensated in a row to be compensated in a current frame according to a data voltage and a gain value of the sub-pixel to be compensated in the row to be compensated in the current frame, the gain value being greater than 1; and respectively writing back the write-back voltage of each sub-pixel to be compensated in the row to be compensated in the current frame correspondingly to the sub-pixel to be compensated in the row to be compensated in scan time of a blank period of the current frame.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: July 19, 2022
    Assignees: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Co., Ltd.
    Inventors: Haixia Xu, Song Meng, Yue Wu, Wenchao Bao, Min He
  • Patent number: 11348518
    Abstract: A method for driving a display panel and a display device are provided. The driving method includes supplying, during a data writing stage of each row of pixel circuits, a driving voltage VA[i] to the data line corresponding to each of the pixel circuits in a row, and supplying a compensation voltage VS to the second node of each of the pixel circuits in the row, and VA[i]=Vdata[i]+Vth[i]+VS, where Vdata[i] is an original data voltage of an ith pixel circuit of the pixel circuits, i is a positive integer, Vth[i] is a threshold voltage of the driving transistor of the ith pixel circuit, and a range from which a value of the compensation voltage VS is selected is [?Vth_min, 0), and Vth_min is a minimum value among all of the threshold voltages of the driving transistors of the pixel circuits of the display panel.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: May 31, 2022
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Wenchao Bao, Min He, Chun Cao
  • Publication number: 20220122539
    Abstract: The present disclosure provides method and device for processing compensation data to be applied to a pixel circuit, and a display panel. The method includes: receiving M compensation data; determining a first threshold range according to (i?N)-th to (i?1)-th standard data, wherein midpoint and length of the first threshold range both depend on the (i?N)-th to (i?1)-th standard data; judging whether an i-th compensation data is in the first threshold range or not; in response to the i-th compensation data being in the first threshold range, determining the i-th compensation data as qualified and using it as an i-th standard data; and in response to the i-th compensation data not being in the first threshold range, determining the i-th compensation data as unqualified, replacing it with an average value of the (i?N)-th to (i?1)-th standard data, and using the replaced i-th compensation data as the i-th standard data.
    Type: Application
    Filed: December 9, 2020
    Publication date: April 21, 2022
    Inventors: Wenchao BAO, Xiaolong WEI
  • Patent number: 11270642
    Abstract: A pixel unit includes a first sub-pixel circuit and a second sub-pixel circuit. The first sub-pixel circuit includes a first sub-pixel driving circuit and a first light-emitting element, and the second sub-pixel circuit includes a second sub-pixel driving circuit and a second light-emitting element. The first sub-pixel driving circuit and the second sub-pixel driving circuit are connected to a first data line, and the first sub-pixel driving circuit is connected to a first gate line, the second sub-pixel driving circuit is connected to the second gate line. The first sub-pixel driving circuit is configured to drive the first light-emitting element by a data voltage on the first data line under the control of the first gate line. The second sub-pixel driving circuit is configured to drive the second light-emitting element by the data voltage on the first data line under the control of the second gate line.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: March 8, 2022
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Meng Li, Yongqian Li, Song Meng, Zhidong Yuan, Can Yuan, Haixia Xu, Wenchao Bao
  • Patent number: 11238800
    Abstract: The present disclosure provides a set-voltage generation unit, a set-voltage generation method and a display device. The set-voltage generation unit includes a voltage generation circuit. The set-voltage generation unit is configured to generate a set voltage according to a gamma main voltage such that a ratio between a variation of the set voltage and a variation of the gamma main voltage is a voltage coefficient K, and K is a positive number less than or equal to 1.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: February 1, 2022
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Min He, Wenchao Bao, Chun Cao, Wei Chen
  • Patent number: 11217202
    Abstract: The present disclosure relates to a method for converting RGB image signals into RGBW image signals. The method includes converting RGB image signals of pixels of each received image frame into corresponding RGB luminance values respectively, performing a conversion from an RGB luminance value to an RGBW luminance value for each pixel, including performing a first conversion to the RGBW luminance value by determining a first conversion amount based on the corresponding RGB luminance value of the pixel to obtain a first RGBW luminance value of the pixel, performing a second conversion to the RGBW luminance value by determining a second conversion amount based on the first RGBW luminance values of the pixel and its adjacent one or more pixels to obtain a second RGBW luminance value of the pixel, and converting the second RGBW luminance values of the pixels of the image frame into corresponding RGBW image signals respectively.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: January 4, 2022
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Min He, Chun Cao, Wenchao Bao
  • Patent number: 11205383
    Abstract: The present disclosure relates to a technical field of display, and provides a scan signal adjusting method, a scan signal adjusting device, and a display panel. The scan signal adjusting method is used to adjust a scan signal of a control end of a switching transistor in a pixel driving circuit. The method includes obtaining a threshold voltage of the switching transistor and adjusting a voltage of the scan signal during a turn-off period according to the threshold voltage of the switching transistor.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: December 21, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Ming Wang, Wenchao Bao
  • Patent number: 11200827
    Abstract: A chromaticity compensation method, a chromaticity compensation device and a storage medium are disclosed. The chromaticity compensation method includes that, according to a preset standard chromaticity value and measured chromaticity values corresponding to a plurality of sub-display regions in a display region, chromaticity compensation values of the sub-display regions are determined, and the display region is divided into the plurality of sub-display regions in close arrangement, and each of the sub-display regions includes a plurality of sub-pixels; a data smoothing treatment is performed between the chromaticity compensation values of the sub-display regions that are adjacent, so as to determine the smoothed chromaticity compensation values of the sub-pixels in the sub-display regions; and upon display, chromaticity compensation of the sub-pixels are performed by adopting the smoothed chromaticity compensation values.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: December 14, 2021
    Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Wenchao Bao, Xiaolong Wei, Dongxu Han
  • Patent number: 11200818
    Abstract: The present disclosure provides a method and a device for abnormal data processing. The method includes: acquiring a queue of data to be detected, wherein the queue of data to be detected comprises M data arranged sequentially, M being a positive integer; filtering the queue of data to be detected with a filtering algorithm in at least two different orders respectively, wherein a window used in the filtering algorithm has a size of N, N being a positive integer smaller than M; determining abnormal data in the queue of data to be detected according to the filtering result; and performing data replacement on the abnormal data according to a preset rule.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: December 14, 2021
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Wenchao Bao, Xiaolong Wei
  • Publication number: 20210335250
    Abstract: The present disclosure relates to a technical field of display, and provides a scan signal adjusting method, a scan signal adjusting device, and a display panel. The scan signal adjusting method is used to adjust a scan signal of a control end of a switching transistor in a pixel driving circuit. The method includes obtaining a threshold voltage of the switching transistor and adjusting a voltage of the scan signal during a turn-off period according to the threshold voltage of the switching transistor.
    Type: Application
    Filed: November 15, 2018
    Publication date: October 28, 2021
    Inventors: Ming WANG, Wenchao BAO
  • Publication number: 20210335258
    Abstract: A method for driving a display panel and a display device are provided. The driving method includes supplying, during a data writing stage of each row of pixel circuits, a driving voltage VA[i] to the data line corresponding to each of the pixel circuits in a row, and supplying a compensation voltage VS to the second node of each of the pixel circuits in the row, and VA[i]=Vdata[i]+Vth[i]+VS, where Vdata[i] is an original data voltage of an ith pixel circuit of the pixel circuits, i is a positive integer, Vth[i] is a threshold voltage of the driving transistor of the ith pixel circuit, and a range from which a value of the compensation voltage VS is selected is [?Vth_min, 0), and Vth_min is a minimum value among all of the threshold voltages of the driving transistors of the pixel circuits of the display panel.
    Type: Application
    Filed: May 20, 2019
    Publication date: October 28, 2021
    Inventors: Wenchao BAO, Min HE, Chun CAO
  • Publication number: 20210335224
    Abstract: A processing method and a processing device for pixel data, a display device, a display method, and a storage medium are provided. The processing method includes: determining a target pixel point in pixel points of a display frame image to be revised, a pixel data of each pixel point including S initial pixel data of different primary colors and a white initial pixel data; converting a white initial pixel data in a pixel data of the target pixel point into S equivalent pixel data of the different primary colors; obtaining S target pixel data of the different primary colors and a white target pixel data of the target pixel point according to the S equivalent pixel data and according to S initial pixel data of the different primary colors in the pixel data of the target pixel point, the white target pixel data corresponding to a 0 gray scale.
    Type: Application
    Filed: February 15, 2019
    Publication date: October 28, 2021
    Applicants: Hefei Xinsheng Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventor: Wenchao Bao
  • Patent number: 11107407
    Abstract: Embodiments of the present disclosure provide a method for driving a pixel circuit, a pixel circuit, and a display panel. In this method, a zero-voltage signal is provided to a data signal terminal. A first ON signal is provided to a first scan signal terminal, a second ON signal is provided to a second scan signal terminal, and a first level data signal or the zero-voltage signal is provided to the data signal terminal. Next, a decreased data signal, a second level data signal and the zero-voltage signal are provided to the data signal terminal.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: August 31, 2021
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Haixia Xu, Yue Wu, Can Yuan, Wenchao Bao