Patents by Inventor Liugang Zhou

Liugang Zhou 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).

  • Publication number: 20210225239
    Abstract: The present disclosure provides a mura compensation device, display panel, display device, and mura compensation method, which belongs to the field of panel technology. The mura compensation device includes a first flexible circuit board and a de-mura circuit, including a storage unit for storing mura compensation data, wherein the de-mura circuit is provided in the first flexible circuit board.
    Type: Application
    Filed: December 11, 2019
    Publication date: July 22, 2021
    Inventors: Jianwei SUN, Liugang ZHOU, Yizhan HAN, Tao LI, Yulong XIONG
  • Publication number: 20210225319
    Abstract: The present disclosure provides a common voltage regulating circuit and a common voltage regulating method, a display driving circuit and a display device, the common voltage regulating circuit is applied to a display panel, and the display panel includes a pixel electrode and a common electrode, the common voltage regulating circuit includes: a first regulating sub-circuit configured to provide a signal from a second signal input terminal to a first signal output terminal under the control of an enabling signal terminal in a power-on stage of the display panel; the first signal input terminal is configured to input a signal to be provided to the common electrode in a display stage of the display panel, the second signal input terminal is configured to input a signal to be provided to the pixel electrode in the power-on stage, the first signal output terminal is coupled with the common electrode.
    Type: Application
    Filed: December 18, 2019
    Publication date: July 22, 2021
    Inventors: Yizhan HAN, Jianwei SUN, Liugang ZHOU, Xiaolong SUO
  • Publication number: 20210225308
    Abstract: The present disclosure provides a method and an apparatus for compensating the display voltage, a display apparatus and a display device, the method comprises acquiring, when performing an inversion operation with a polarity inversion signal for an arbitrary pixel, a preceding grayscale value and a subsequent grayscale value of the pixel, wherein the polarity inversion signal is configured to control the polarity of the pixel voltage of the pixel, the preceding grayscale value is a grayscale value of the pixel in a preceding frame before the inversion operation, and the subsequent grayscale value is the grayscale value of the pixel in a subsequent frame after the inversion operation.
    Type: Application
    Filed: December 3, 2019
    Publication date: July 22, 2021
    Applicants: Hefei BOE Display Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yulong Xiong, Liugang Zhou, Tao Li, Yizhan Han, Jianwei Sun, Liu He, Yunyun Liang
  • Patent number: 11069320
    Abstract: A chip-on-film and a display device. The chip-on-film includes a substrate, at least one chip on the substrate, input terminals on the substrate, and output terminals on the substrate. The input terminals are configured to receive printed-circuit-board signals. The output terminals include data signal output sub-terminals configured to output display panel data signals. The output terminals lack an output sub-terminal configured to output a display panel scanning signal.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: July 20, 2021
    Assignees: HEFEI BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yizhan Han, Ke Dai, Liugang Zhou
  • Patent number: 11062669
    Abstract: The present disclosure provides a driving circuit and driving method for a liquid crystal display panel, and a display device. The driving circuit includes: a signal collector, configured to collect a backlight control signal; and a timing control chip, configured to determine whether a BLU is in the bright state time period or in the dark state time period, and retrieve a first gate control signal from a memory chip and output the first gate control signal to a gate driving circuit, when determining that the BLU is in the bright state time period, or retrieve a second gate control signal from the memory chip and output the second gate control signal to the gate driving circuit, when determining that the BLU is in the dark state time period.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: July 13, 2021
    Assignees: HEFEI BOE DISPLAY TECHNOLOGY CO., LTD., BOE Technology Group Co., Ltd.
    Inventors: Ke Dai, Yunyun Liang, Liugang Zhou, Zhenlin Qu, Liu He, Qing Li, Jun Wang, Yu Quan, Xiaofeng Yin, Liwei Zhou, Lin Zhang, Tao Li, Yulong Xiong
  • Publication number: 20210201840
    Abstract: The present disclosure is related to a driving circuit of a display panel. The driving circuit may include a turn-on voltage adjusting circuit. The turn-on voltage adjusting circuit may include a control subcircuit and a switching and voltage division subcircuit. The switching and voltage division subcircuit may include a switching subcircuit and a basic voltage division subcircuit. The switching subcircuit may be configured to perform voltage division of a signal outputted by the output terminal of the control subcircuit to form a voltage division feedback signal of the corresponding resolution under control of the control signal and output the voltage division feedback signal to the voltage division feedback node.
    Type: Application
    Filed: April 8, 2018
    Publication date: July 1, 2021
    Applicant: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Guangliang Shang, Liugang Zhou, Haoliang Zheng, Yaoqiu Jing, Mingfu Han, Seungwoo Han
  • Patent number: 11043153
    Abstract: A control circuit board, an additional circuit board and a display device. The control circuit board includes a timing control circuit, the timing control circuit is configured to read a configuration code from a storage circuit on an additional circuit board outside the control circuit board, the configuration code includes a first code for configuring the timing control circuit, and the timing control circuit is further configured to generate, based on the first code, a control signal for controlling the display panel.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: June 22, 2021
    Assignees: HEFEI BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Ke Dai, Tao Li, Liugang Zhou
  • Publication number: 20210174756
    Abstract: The disclosure discloses a method and apparatus for driving a display panel, and a display device. A method for driving a display panel according to an embodiment of this disclosure includes: determining a charging length of time of the current row of pixels; determining a common voltage value corresponding to the charging length of time; and driving the current row of pixels using the common voltage value.
    Type: Application
    Filed: July 27, 2018
    Publication date: June 10, 2021
    Applicant: BOE Technology Group Co., Ltd.
    Inventors: Liugang ZHOU, Yifang CHU, Shou LI
  • Publication number: 20210150962
    Abstract: A display driving device, a display driving method, a display module and a display device are provided. The display driving device includes: a PWM signal generating circuit configured to generate a PWM signal; a PWM signal acquisition circuit, configured to identify whether the PWM signal output by the PWM signal generating circuit is at a high level or a low level; a gamma voltage debugging circuit, configured to debug a gamma voltage to obtain a first group of gamma voltage reference data corresponding to the PWM signal at the high level and a second group of gamma voltage reference data corresponding to the PWM signal at the low level in each gray-scale image; and a gamma voltage switching circuit.
    Type: Application
    Filed: November 10, 2020
    Publication date: May 20, 2021
    Inventors: Qing LI, Liugang ZHOU, Ke DAI, Yizhan HAN, Liu HE, Yunyun LIANG, Jun WANG, Zhenlin QU, Jianwei SUN, Yulong XIONG, Tao LI, Yu QUAN, Xiaofeng YIN, Qian ZHOU, Pengjun FANG
  • Patent number: 11004414
    Abstract: A display device and a method for driving the same are provided. The display device includes an array substrate and a data driving circuit, the array substrate includes a plurality of data lines divided into multiple groups, each group includes at least two data lines, first ends of the data lines in each group are connected together by the data driving circuit during a first charge sharing phase of each scanning period, the array substrate further includes a plurality of switches; the display device further includes a control circuit configured to output a control signal during a second charge sharing phase of each scanning period, each switch is turned on according to the control signal to connect second ends of corresponding data lines in corresponding group; in each scanning period, the first charge sharing phase and the second charge sharing phase are at least partially overlapped with each other.
    Type: Grant
    Filed: January 7, 2019
    Date of Patent: May 11, 2021
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Bingbing Yan, Liugang Zhou, Wenwu Lu, Xueqin Wei, Lixin Zhu, Shenghua Hu
  • Patent number: 10984695
    Abstract: A display driving device is disclosed. The display driving device includes: a data signal end for providing a data signal, a source line, and a switching circuit. The source line can transmit the data signal to a first pixel circuit and a second pixel circuit. Along a direction of the source line, a distance between the second pixel circuit and the data signal end is larger than a distance between the first pixel circuit and the data signal end. The switching circuit is between the data signal end and the source line, and can be turned on in response to a first control signal, and can be turned on in response to a second control signal. A turned-on time period of the switching circuit in response to the second control signal is longer than a turned-on time period of the switching circuit in response to the first control signal.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: April 20, 2021
    Assignees: Hefei BOE Display Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Yulong Xiong, Liugang Zhou, Tao Li, Yizhan Han, Jianwei Sun, Liu He
  • Publication number: 20210097950
    Abstract: The present disclosure provides a driving circuit and driving method for a liquid crystal display panel, and a display device. The driving circuit includes: a signal collector, configured to collect a backlight control signal; and a timing control chip, configured to determine whether a BLU is in the bright state time period or in the dark state time period, and retrieve a first gate control signal from a memory chip and output the first gate control signal to a gate driving circuit, when determining that the BLU is in the bright state time period, or retrieve a second gate control signal from the memory chip and output the second gate control signal to the gate driving circuit, when determining that the BLU is in the dark state time period.
    Type: Application
    Filed: August 17, 2020
    Publication date: April 1, 2021
    Inventors: Ke Dai, Yunyun Liang, Liugang Zhou, Zhenlin Qu, Liu He, Qing Li, Jun Wang, Yu Quan, Xiaofeng Yin, Liwei Zhou, Lin Zhang, Tao Li, Yulong Xiong
  • Publication number: 20210074201
    Abstract: The present disclosure provides a voltage compensation circuit and a voltage compensation method, a display driving circuit and a display device. The voltage compensation circuit includes: a voltage analyzing sub-circuit and a gamma voltage generating sub-circuit. The voltage analyzing sub-circuit is coupled to the display panel and configured to obtain pixel voltages of target pixels in the image to be detected; judge whether the display panel is abnormal according to the pixel voltages; generate a compensation control signal in response to that the display panel is abnormal. The gamma voltage generating sub-circuit is coupled to the voltage analyzing sub-circuit and is configured to compensate a gamma voltage corresponding to the image to be detected according to the compensation control signal so as to enable the pixel voltages of the target pixels to be consistent.
    Type: Application
    Filed: December 18, 2019
    Publication date: March 11, 2021
    Inventors: Yizhan HAN, Liugang ZHOU, Jianwei SUN, Tao LI, Yulong XIONG, Chunheng ZHANG, Qing LI
  • Publication number: 20210049969
    Abstract: A display driving method includes: determining, by a timing controller, an actual grayscale value of a sub-pixel image in an X-th row and a Y-th column according to a preset grayscale value of a sub-pixel image in an (X?1)-th row and the Y-th column and a preset grayscale value of the sub-pixel image in the X-th row and the Y-th column of an image frame to be displayed. The image frame to be displayed includes J rows and Q columns of sub-pixel images. X is greater than or equal to 2, and is less than or equal to J. Y is greater than or equal to 1, and is less than or equal to Q, and X, Y, J, and Q are all integers.
    Type: Application
    Filed: August 14, 2020
    Publication date: February 18, 2021
    Inventors: Jun WANG, Liugang ZHOU, Jingang LIU, Ke DAI, Xiaofeng YIN, Jianwei SUN, Liu HE, Zhenlin QU, Qing LI, Yunyun LIANG, Yulong XIONG, Yu QUAN
  • Publication number: 20210051780
    Abstract: A source driver includes at least one data input terminal, a plurality of data output terminals, at least two control terminals and a plurality of source driving circuits. Each source driving circuit is connected to a data input terminal of the at least one data input terminal, a data output terminal of the plurality of data output terminals and the at least two control terminals. The source driving circuit is configured such that: the source driving circuit converts a format of a data signal from the data input terminal; and in response to one of different control signals that is received by all the at least two control terminals, the source driving circuit has a corresponding different output impedance, and transmits the converted data signal to the data output terminal.
    Type: Application
    Filed: August 11, 2020
    Publication date: February 18, 2021
    Inventors: Jianwei SUN, Liugang ZHOU, Ke DAI, Yizhan HAN, Yulong XIONG, Tao LI, Xiaofeng YIN, Maoyang ZHU, Pengjun FANG
  • Publication number: 20210043154
    Abstract: A gray-scale drive table generating device is described that includes a sampling circuit configured to collect a first voltage between a drive electrode of a sub-pixel of a positive-frame and a common electrode and a second voltage between a drive electrode of a sub-pixel of a negative-frame and the common electrode in a display panel in each gray-scale; a processing circuit configured to generate a trigger signal when a voltage difference between the first voltage and the second voltage is greater than a voltage threshold; an adjustment circuit configured to adjust drive gray-scales of the sub-pixel of the positive-frame and/or the sub-pixel of the negative-frame in response to the trigger signal to make the voltage difference less than the voltage threshold; and a recording circuit configured to generate an adjusted gray-scale drive table according to the drive gray-scales of the sub-pixel of the positive-frame and the sub-pixel of the negative-frame in each gray-scale.
    Type: Application
    Filed: January 7, 2020
    Publication date: February 11, 2021
    Inventors: Tao LI, Liugang ZHOU, Ke DAI, Yizhan HAN, Jianwei SUN, Yulong XIONG, Zhenlin QU
  • Patent number: 10902803
    Abstract: The disclosure discloses a display panel, a voltage adjustment method thereof, and a display device, and the display panel includes: at least two reference sub-pixels; a voltage compensation element coupled respectively with respective reference sub-pixels; and a power management element coupled with the voltage compensation element, wherein the voltage compensation element is configured to acquire valid values of pixel voltage of the respective reference sub-pixels when the at least two reference sub-pixels receive the same data voltage, and to generate a compensation signal of gate off voltage for the purpose of making the acquired valid values of the pixel voltage of the respective reference sub-pixels uniform; and the power management element is configured to adjust a voltage value of the gate off voltage according to the compensation signal of the gate off voltage.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: January 26, 2021
    Assignees: HEFEI BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yizhan Han, Shou Li, Liugang Zhou, Tao Li, Yulong Xiong, Jianwei Sun
  • Publication number: 20210012699
    Abstract: The preset disclosure provides a display control method, a timing controller IC and a display device. The method includes: acquiring a preset grayscale voltage of a target pixel unit and a backlight brightness of a backlight region corresponding to the target pixel unit, in a current output display frame; outputting a first grayscale voltage to the target pixel unit if the backlight brightness of the corresponding backlight region is less than or equal to a first preset brightness value; outputting a second grayscale voltage to the target pixel unit if the backlight brightness of the corresponding backlight region is greater than the first preset brightness value; wherein the second grayscale voltage is greater than the first grayscale voltage, and both the second grayscale voltage and the first grayscale voltage are greater than the preset grayscale voltage.
    Type: Application
    Filed: June 22, 2020
    Publication date: January 14, 2021
    Inventors: Zhenlin QU, Liugang ZHOU, Ke DAI, Tao LI, Yulong XIONG, Yizhan HAN, Jianwei SUN, Liu HE, Yunyun LIANG, Jun WANG, Qing LI, Xutong CHEN, Liwei ZHOU, Xiaofeng YIN
  • Publication number: 20200388235
    Abstract: A driving method of a display panel, a driving circuitry of a display panel and a display device are provided. The display panel includes Y gate lines, the Y gate lines are divided into a plurality of gate line groups based on a scanning sequence of the Y gate lines, and each gate line group includes at least one gate line; the driving method includes: determining an ith gate line to be scanned; adjusting an original charging duration of a scanning signal corresponding to the ith gate line to an adjustment charging duration, where the adjustment charging duration of every gate line in each gate line group are identical, and the adjustment charging durations of respective gate line groups gradually increase in a direction away from a source driver; and outputting the scanning signal corresponding to the ith gate line to the ith gate line, based on the adjustment charging duration of the ith gate line.
    Type: Application
    Filed: August 29, 2017
    Publication date: December 10, 2020
    Applicants: BOE Technology Group Co., Ltd., Beijing BOE Display Technology Co., Ltd.
    Inventors: Liugang ZHOU, Jianming WANG, Shou LI, Tao LI, Yuan SHI
  • Patent number: 10768455
    Abstract: A data compensation method and apparatus for a liquid crystal display screen are described herein. Said method comprises determining a timing length ?T? from the last turn-off of the liquid crystal display screen upon turn-on of the liquid crystal display screen, and determining a mura data compensation table am called at the time of the last turn-off; determining a mura data compensation table to be called at the time of the present turn-on according to a pre-set time length T needed for stabilization of mura, mura data compensation tables corresponding to pre-set different time periods, said timing length ?T?, and said mura data compensation table am; performing data compensation starting from the determined mura data compensation table to be called at the time of the present turn-on. By using said method for data compensation, an appropriate initial data compensation table can be determined to obtain a better compensation effect.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: September 8, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventors: Luqiang Guo, Liugang Zhou, Shou Li, Jianming Wang, Shuhuan Yu, Chenxi Liu, Jian Zhang