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).

  • Publication number: 20190371245
    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.
    Type: Application
    Filed: January 4, 2018
    Publication date: December 5, 2019
    Inventors: Can Yuan, Zhidong Yuan, Yongqian Li, Pan Xu, Wenchao Bao, Min He
  • Patent number: 10403187
    Abstract: A gamma voltage debugging method for an electroluminescent display device, including: turning on sub-pixels in a test region to a maximum luminance value, and recording a driving current of an electroluminescent element at this time as a maximum reference current; calculating reference current values corresponding to respective gray scales according to the maximum reference current and a preset formula; and driving the sub-pixels in the test region to emit light, and for each driving current equal to a reference current value, recording a driving voltage value corresponding to the gray scale value as a gamma voltage resulted from the debugging.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: September 3, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Dongxu Han, Tieshi Wang, Pan Xu, Wenchao Bao, Chi Zhang, Zhongyuan Wu
  • Publication number: 20190164471
    Abstract: Embodiments of the present disclosure disclose a current control method and an apparatus thereof. The current control method includes: generating a correspondence between grayscale brightness and a current of a display panel; detecting, in a blank interval of a display period, an actual current value and an actual grayscale brightness of the display panel; determining a target current value by looking up a correspondence between the grayscale brightness and the current according to a target grayscale brightness of the display panel; and adjusting, based on a comparison of the actual current value and the target current value, the actual grayscale brightness so that the actual current value is less than or equal to the target current value.
    Type: Application
    Filed: May 18, 2018
    Publication date: May 30, 2019
    Inventors: Haixia Xu, Wenchao Bao
  • Publication number: 20180301100
    Abstract: A display device, a gate driving circuit and a gate driving unit are provided. The gate driving unit includes: a signal maintenance circuit configured to, in the case that a first clock signal at a high level is received, output a high level in accordance with an inputted trigger signal at a high level; a first-level output circuit configured to, in the case that a second clock signal at a high level is received, output a first-level driving signal at a high level in accordance with the high level from an output end of the signal maintenance circuit; and a second-level output circuit configured to, in the case that a third clock signal at a high level is received, output a second-level driving signal at a high level in accordance with the high level from an output end of the first-level output circuit.
    Type: Application
    Filed: November 22, 2017
    Publication date: October 18, 2018
    Inventors: Meng Li, Yongqian Li, Pan Xu, Zhenfei Cai, Zhidong Yuan, Can Yuan, Xuehuan Feng, Wenchao Bao
  • Publication number: 20180247577
    Abstract: A gamma voltage debugging method for an electroluminescent display device, including: turning on sub-pixels in a test region to a maximum luminance value, and recording a driving current of an electroluminescent element at this time as a maximum reference current; calculating reference current values corresponding to respective gray scales according to the maximum reference current and a preset formula; and driving the sub-pixels in the test region to emit light, and for each driving current equal to a reference current value, recording a driving voltage value corresponding to the gray scale value as a gamma voltage resulted from the debugging.
    Type: Application
    Filed: September 29, 2017
    Publication date: August 30, 2018
    Inventors: Dongxu HAN, Tieshi WANG, Pan XU, Wenchao BAO, Chi ZHANG, Zhongyuan WU
  • Publication number: 20180137799
    Abstract: Embodiments of the present disclosure provide a shift register unit and a driving method thereof, a row scanning driving circuit and a display device. The shift register unit includes an input terminal, a reset terminal, and an output terminal, and further includes an input module configured to pull up the electric level at the first node, an output module configured to pull up the electric level at the output terminal, a reset module configured to pull down the electric level at the first node, and a first pull-down module configured to pull down the electric level at the output terminal. Embodiments of the present disclosure can solve the problem that the floating state of the row scanning driving circuit affects the output stability.
    Type: Application
    Filed: February 25, 2016
    Publication date: May 17, 2018
    Inventors: Min HE, Guangcai YUAN, Wenchao BAO
  • Publication number: 20180031419
    Abstract: Disclosed is a data acquisition device for optical compensation including a platform for carrying a display panel; and a linear image acquisition module located above the platform. The linear image acquisition module is movable relative to the platform.
    Type: Application
    Filed: July 21, 2017
    Publication date: February 1, 2018
    Inventors: Dongxu HAN, Tieshi WANG, Chi ZHANG, Wenchao BAO, Min HE, Pan Xu, Yongqian LI, Kun CAO, Yue WU
  • Publication number: 20180025690
    Abstract: A pixel circuit and a driving method thereof, and a display panel including the same. The pixel circuit includes, a first module and a second driving circuit, the first driving circuit drives the light emitting circuit to emit light during a first period under control of a first scanning signal at the first scanning control terminal, and the second driving circuit drives the light emitting circuit to emit light during a second period under control of a second scanning signal at the second scanning control terminal, the first and the second period not overlapping with each other. A light emitting device is alternately driven to emit light by using two driving circuits, so that one driving circuit enters a recovery stage while the other driving circuit drives the light emitting device to emit light, and thus threshold voltage drift of driving transistor can be reduced, while lifespan thereof can be prolonged.
    Type: Application
    Filed: November 16, 2016
    Publication date: January 25, 2018
    Inventors: Wenchao BAO, Guangcai YUAN
  • Publication number: 20170301276
    Abstract: Embodiments of the present disclosure provide a shift register unit and a driving method thereof, a row scanning driving circuit and a display device. The shift register unit includes an input terminal, a reset terminal, and an output terminal, and further includes an input module configured to pull up the electric level at the first node, an output module configured to pull up the electric level at the output terminal, a reset module configured to pull down the electric level at the first node, and a first pull-down module configured to pull down the electric level at the output terminal. Embodiments of the present disclosure can solve the problem that the floating state of the row scanning driving circuit affects the output stability.
    Type: Application
    Filed: February 25, 2016
    Publication date: October 19, 2017
    Inventors: Min HE, Guangcai YUAN, Wenchao BAO
  • Patent number: 9175060
    Abstract: Exendins or exendin analogs modified by one or more PEG derivatives that may be linked to one or more amino acids of the exendins or exendin analogs are provided. The PEG derivatives may have branched structure set forth in any one of formulas I-IV. Compositions including the PEG derivative modified exendin or exendin analog, methods of making or administering the modified exendin or exendin analog, and various uses thereof are also provided.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: November 3, 2015
    Assignee: Shanghai Benemae Pharmaceutical Corporation
    Inventors: Wenchao Bao, Hongjing Xu, Gang Yu, Yajun Zuo
  • Publication number: 20100240586
    Abstract: Exendins or exendin analogs modified by one or more PEG derivatives that may be linked to one or more amino acids of the exendins or exendin analogs are provided. The PEG derivatives may have branched structure set forth in any one of formulas I-IV. Compositions including the PEG derivative modified exendin or exendin analog, methods of making or administering the modified exendin or exendin analog, and various uses thereof are also provided.
    Type: Application
    Filed: November 13, 2007
    Publication date: September 23, 2010
    Applicant: Shanghai Huayi Bio-Lab Co., Ltd.
    Inventors: Wenchao Bao, Hongling Xu, Gang Yu, Yajun Zuo