Patents by Inventor Haiming Cao

Haiming Cao 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: 12165609
    Abstract: The present application provides a display panel in which transistors in an input pull-up module, a stage transfer output module, and an output pull-up module are provided as P-type low temperature polysilicon thin film transistors, and a transistor in an output pull-down module is provided as an N-type metal oxide thin film transistor.
    Type: Grant
    Filed: September 6, 2021
    Date of Patent: December 10, 2024
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Haiming Cao, Chao Tian, Yanqing Guan, Fei Ai, Guanghui Liu, Zhifu Li
  • Patent number: 12154470
    Abstract: A gate driving circuit and a display panel are disclosed. A pull-up control module and a pull-down module of each stage gate driving unit are connected to a first node. A thin film transistor in the pull-up control module and/or pull-down module that is connected to the first node is an oxide thin film transistor, such that a leakage current of the first node is reduced due to the advantage of the small off-state leakage current of the oxide thin film transistor. Therefore, the voltage level of the first node can remain stable during a pull-up stage and a touch suspension stage.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: November 26, 2024
    Inventors: Haiming Cao, Yanqing Guan, Chao Tian, Fei Ai, Guanghui Liu, Zhifu Li
  • Patent number: 12142191
    Abstract: A driving circuit, a driving method thereof, and a display device are provided, including making a first switch connected to a gate of a driving transistor be in a first state during a previous frame, and be in a second state in a current frame, and making a second switch in series with the first switch be in the second state in the previous frame, and be in the first state in the current frame, wherein the first state is one of a conducting-and-cut-off switching state or a constantly conducting state, and the second state is the other of the conducting-and-cut-off switching state or the constantly conducting state.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: November 12, 2024
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Haiming Cao, Yanqing Guan
  • Patent number: 12118909
    Abstract: The present application discloses a gate drive circuit and a display panel. The gate drive circuit includes a plurality of cascaded gate drive units, in which by adopting a same complex clock signal for a pull-down control module, a maintaining module and a pull-down module, a N-th-stage gate drive unit can rapidly pull down a falling edge of a N-th-stage scan signal to the potential of a constant low voltage level signal and effectively reduces the time required to pull down the N-th-stage scan signal from high voltage level to low voltage level.
    Type: Grant
    Filed: June 18, 2021
    Date of Patent: October 15, 2024
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Haiming Cao
  • Publication number: 20240296767
    Abstract: The present disclosure provides a display panel and a display device. The display panel includes a plurality of scan lines and at least one pull-down circuit unit.disposed at intervals ina n The pull-down circuit includes a forward scan pull-down unit and/or a reverse scan pull-down unit. The forward scan pull-down unit receives a (n+m)th scan signal, a first control signal, and a reference low level signal, and is connected to the nth scan line. The reverse scan pull-down unit receives a (n?m)th scan signal, a second control signal, and the reference low level signal, and is connected to the nth scan line.
    Type: Application
    Filed: September 1, 2022
    Publication date: September 5, 2024
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Haiming CAO, Chao TIAN, Fei AI, Guanghui LIU
  • Publication number: 20240257781
    Abstract: The present application provides a display panel in which transistors in an input pull-up module, a stage transfer output module, and an output pull-up module are provided as P-type low temperature polysilicon thin film transistors, and a transistor in an output pull-down module is provided as an N-type metal oxide thin film transistor.
    Type: Application
    Filed: September 6, 2021
    Publication date: August 1, 2024
    Inventors: Haiming CAO, Chao TIAN, Yanqing GUAN, Fei Al, Guanghui LIU, Zhifu LI
  • Publication number: 20240209072
    Abstract: A method of reducing a symptom of a clinical disorder characterized by aberrantly elevated circulating aP2 is carried out by administering to a subject an inhibitor of secreted aP2, secretion of aP2, or a serum aP2 blocking agent. For example, glucose intolerance is reduced following administration of such an inhibitor or agent. Exemplary compositions inhibit cellular secretion of aP2 or bind to circulating aP2, thereby reducing the level or activity of aP2 in blood or serum.
    Type: Application
    Filed: June 26, 2023
    Publication date: June 27, 2024
    Applicant: President and Fellows of Harvard College
    Inventors: Gokhan S. Hotamisligil, Haiming Cao
  • Patent number: 12020614
    Abstract: A gate drive circuit and a display panel are provided. A pull-up module and a pull-down module of the gate drive circuit output a constant-voltage high potential to a second node, a third node, and a n-th stage gate drive signal through a P-type thin film transistor and output constant-voltage low potential through a N-type thin film transistor to the second node, the third node, and an n-th gate drive signal, thereby improving the stability of the output signal of the thin film transistor connected to the gate drive circuit and the key node.
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: June 25, 2024
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Haiming Cao, Chao Tian, Yanqing Guan, Fei Ai, Guanghui Liu
  • Patent number: 12014666
    Abstract: A pixel driving circuit and a display panel are provided. The pixel driving circuit includes a data writing module, a data conversion module, and a current driving module. The data writing module is electrically connected to a first node and configured to transmit a data signal to the first node. The data conversion module is electrically connected to the first node, a second node, and a modulation signal source, and configured to generate a current driving control signal, and to output the current driving control signal to the second node. The current driving module is electrically connected to the second node, a light-emitting control wire, and a light-emitting device, and configured to control the light-emitting device to emit light. An effective pulse of the current driving control signal has different pulse widths in different gray-scale states.
    Type: Grant
    Filed: October 30, 2022
    Date of Patent: June 18, 2024
    Inventors: Haiming Cao, Chao Tian, Fei Ai, Guanghui Liu
  • Patent number: 11996062
    Abstract: A display panel and a gate driving circuit are provided. The gate driving circuit utilizes the pull-down control module to periodically pull up and pull down the voltage level of the second node. The voltage level of the second node is periodically a high voltage level. This effectively reduces the time duration when the second node corresponds to the high voltage level. After the TFTs electrically connected to the second node are forward biased, the TFTs could have sufficient recovery time. This solution effectively improves the bias condition of the TFTs in the pull-down control module and thus makes the circuit more stable and raises the reliability of the circuit.
    Type: Grant
    Filed: May 31, 2021
    Date of Patent: May 28, 2024
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yanqing Guan, Chao Tian, Haiming Cao
  • Publication number: 20240119883
    Abstract: A pixel driving circuit and a display panel are provided. The pixel driving circuit includes a data writing module, a data conversion module, and a current driving module. The data writing module is electrically connected to a first node and configured to transmit a data signal to the first node. The data conversion module is electrically connected to the first node, a second node, and a modulation signal source, and configured to generate a current driving control signal, and to output the current driving control signal to the second node. The current driving module is electrically connected to the second node, a light-emitting control wire, and a light-emitting device, and configured to control the light-emitting device to emit light. An effective pulse of the current driving control signal has different pulse widths in different gray-scale states.
    Type: Application
    Filed: October 30, 2022
    Publication date: April 11, 2024
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Haiming CAO, Chao TIAN, Fei AI, Guanghui LIU
  • Publication number: 20240029609
    Abstract: A gate drive circuit and a display panel are provided. A pull-up module and a pull-down module of the gate drive circuit output a constant-voltage high potential to a second node, a third node, and a n-th stage gate drive signal through a P-type thin film transistor and output constant-voltage low potential through a N-type thin film transistor to the second node, the third node, and an n-th gate drive signal, thereby improving the stability of the output signal of the thin film transistor connected to the gate drive circuit and the key node.
    Type: Application
    Filed: August 6, 2021
    Publication date: January 25, 2024
    Applicant: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Haiming CAO, Chao TIAN, Yanqing GUAN, Fei AI, Guanghui LIU
  • Publication number: 20240021117
    Abstract: The present application discloses a gate drive circuit and a display panel. The gate drive circuit includes a plurality of cascaded gate drive units, in which by adopting a same complex clock signal for a pull-down control module, a maintaining module and a pull-down module, a N-th-stage gate drive unit can rapidly pull down a falling edge of a N-th-stage scan signal to the potential of a constant low voltage level signal and effectively reduces the time required to pull down the N-th-stage scan signal from high voltage level to low voltage level.
    Type: Application
    Filed: June 18, 2021
    Publication date: January 18, 2024
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Haiming Cao
  • Publication number: 20240005829
    Abstract: A gate driving circuit and a display panel are disclosed. A pull-up control module and a pull-down module of each stage gate driving unit are connected to a first node. A thin film transistor in the pull-up control module and/or pull-down module that is connected to the first node is an oxide thin film transistor, such that a leakage current of the first node is reduced due to the advantage of the small off-state leakage current of the oxide thin film transistor. Therefore, the voltage level of the first node can remain stable during a pull-up stage and a touch suspension stage.
    Type: Application
    Filed: October 29, 2021
    Publication date: January 4, 2024
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Haiming CAO, Yanqing GUAN, Chao TIAN, Fei AI, Guanghui LIU, Zhifu LI
  • Publication number: 20230402019
    Abstract: A display panel and a gate driving circuit are provided. The gate driving circuit utilizes the pull-down control module to periodically pull up and pull down the voltage level of the second node. The voltage level of the second node is periodically a high voltage level. This effectively reduces the time duration when the second node corresponds to the high voltage level. After the TFTs electrically connected to the second node are forward biased, the TFTs could have sufficient recovery time. This solution effectively improves the bias condition of the TFTs in the pull-down control module and thus makes the circuit more stable and raises the reliability of the circuit.
    Type: Application
    Filed: May 31, 2021
    Publication date: December 14, 2023
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yanqing Guan, Chao Tian, Haiming Cao
  • Patent number: 11817044
    Abstract: The present application provides a pixel driving circuit and a display panel. The pixel driving circuit includes an amplitude regulating module and a pulse width modulation module, where the amplitude regulating module and the pulse width modulation module are both electrically connected to a first node, so that the pulse width modulation module and the amplitude modulation module are configured to cooperate with a first data signal and a second data signal, respectively, to realize regulation of both the pulse width and the amplitude of the valid pulse of the driving current signal for driving the light emitting device to emit light. As such, the valid pulse of the driving current signal has different pulse widths and different amplitudes under correspondingly different gray scale states, so that the light emitting brightness and the light emitting duration of the light emitting device under correspondingly different gray scale states are different.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: November 14, 2023
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Haiming Cao, Chao Tian, Fei Ai, Guanghui Liu
  • Patent number: 11749223
    Abstract: The present disclosure provides a pixel driving circuit and a display panel. After pre-charging a first node to a first electrical potential, raising it to a second electrical potential through a first capacitor by a current row gate output signal G(n), and then raising it to a third electrical potential which is a high electrical potential greater than an electrical potential of the current row gate output signal G(n), so that a first transistor is turned on and data is written, raising an original electrical potential of a gate and improving driving capability since a gate electrical potential of the first transistor can be raised to greater than the G(n).
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: September 5, 2023
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Haiming Cao
  • Publication number: 20230274688
    Abstract: A driving circuit, a driving method thereof, and a display device are provided, including making a first switch connected to a gate of a driving transistor be in a first state during a previous frame, and be in a second state in a current frame, and making a second switch in series with the first switch be in the second state in the previous frame, and be in the first state in the current frame, wherein the first state is one of a conducting-and-cut-off switching state or a constantly conducting state, and the second state is the other of the conducting-and-cut-off switching state or the constantly conducting state.
    Type: Application
    Filed: September 11, 2020
    Publication date: August 31, 2023
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Haiming Cao, Yanqing Guan
  • Patent number: 11715436
    Abstract: In a GOA circuit provided by the present disclosure, a unidirectional feedback circuit is adopted between a first node and a second node of the GOA circuit of the present disclosure, which can reduce complexity of circuit design, make it easier to achieve linear design and in-plane integration, prevent point competition of the first node and the second node, and improve stability of the circuit.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: August 1, 2023
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chao Tian, Haiming Cao
  • Patent number: 11705032
    Abstract: A driving circuit and a display panel are disclosed. The driving circuit includes a plurality of cascaded driving units. The driving unit includes a forward/backward scan control module, a first control node controlling module, a second control node controlling module, a global control module, a regulating module, a first output module configured to output a stage signal, and a second output module configured to output a gate driving signal. A voltage level of the gate driving signal is higher than a voltage level of the stage signal.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: July 18, 2023
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Haiming Cao, Yanqing Guan