Patents by Inventor Yanqing GUAN

Yanqing GUAN 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: 12136396
    Abstract: The present application provides a display panel and a display device. An N-th auxiliary unit is arranged in a display area of the display panel. An output end of the N-th auxiliary unit is connected to an N-th scan line. By connecting the auxiliary unit arranged in the display area to the corresponding scan line, a falling edge of a scan signal transmitted in the scan line can have sharp falling or a rising edge of the scan signal can have sharp rising, which can alleviate a signal distortion problem caused by transmission delay in the display area.
    Type: Grant
    Filed: June 8, 2021
    Date of Patent: November 5, 2024
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chao Tian, Yanqing Guan, Guanghui Liu, Fei Ai
  • Patent number: 12132120
    Abstract: A thin film transistor and a display panel are provided. A first dimension of a first transmission portion electrically connected to a source heavily-doped portion is different from a second dimension of a second transmission portion electrically connected to a drain heavily-doped portion, so that an intensity of an electric field of carriers transmitted by the transmission portion corresponding to the larger one of the first dimension or the second dimension is smaller when the thin film transistor is turned on, thereby reducing the bombardment effect of the carriers on a source or a drain and improving the stability of thin film transistor.
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: October 29, 2024
    Inventors: Hong Cheng, Chao Tian, Yanqing Guan, Guanghui Liu
  • Patent number: 12125424
    Abstract: The present application discloses a gate driving circuit and a display panel. The gate driving circuit comprises a plurality of cascaded gate driving modules. A first driving signal can be output through a first output node, and at the same time, a second driving signal with a same phase as the first driving signal can be output through a second output node, and a gate driving sub-module and an in-phase output sub-module share the first output node and a pull-down node, which simplifies a circuit topology of the gate driving circuit.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: October 22, 2024
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Mingyue Li, Chao Tian, Yanqing Guan, Fei Ai, Guanghui Liu
  • Publication number: 20240331603
    Abstract: The present application discloses a gate drive circuit and a display device. The gate drive circuit includes a plurality of cascaded gate drive units, in which one of the gate drive units includes a first layout, an input module and a pull-up module. By receiving a potential changeable signal by the gate of a first transistor or the gate of a second thin-film transistor, it can alleviate or avoid current leakage caused when a first node keeps at a same voltage level for a long time, thereby improving the stability of the potential of the first node.
    Type: Application
    Filed: June 12, 2024
    Publication date: October 3, 2024
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Mingyue LI, Chao TIAN, Yanqing GUAN, Fei AI, Guanghui LIU
  • Publication number: 20240297174
    Abstract: The present application provides an array substrate, a display panel, and a display device. In the present application, a plurality of first-type data lines and a plurality of second-type data lines with data voltages of opposite polarities are provided, and a light-shielding layer of each of first sub-pixels is at least electrically connected to a light-shielding layer of one of second sub-pixels through a connecting line, which can effectively reduce a change in pixel brightness caused by capacitive coupling, and relieve a problem of image flicker.
    Type: Application
    Filed: March 31, 2021
    Publication date: September 5, 2024
    Inventors: Xuebin YUAN, Yanqing GUAN, Congxing YANG, Chao TIAN, Fuhsiung TANG
  • 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
  • Patent number: 12046172
    Abstract: The present application discloses a gate drive circuit and a display device. The gate drive circuit includes a plurality of cascaded gate drive units, in which one of the gate drive units includes a first layout, an input module and a pull-up module. By receiving a potential changeable signal by the gate of a first transistor or the gate of a second thin-film transistor, it can alleviate or avoid current leakage caused when a first node keeps at a same voltage level for a long time, thereby improving the stability of the potential of the first node.
    Type: Grant
    Filed: July 15, 2021
    Date of Patent: July 23, 2024
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Mingyue Li, Chao Tian, Yanqing Guan, Fei Ai, Guanghui Liu
  • Publication number: 20240221564
    Abstract: The present application provides a display panel and an electronic device. The electronic device comprises the display panel. The display panel comprises a gate driving unit, a first auxiliary driving unit and scan lines. The first auxiliary driving unit rapidly pulls down the falling edge of the scan signal transmitted in the scan line to reduce the delay of the falling edge of the scan line. Thus, the number of gate driving units in the display panel can be reduced, thereby reducing the width of the frame of the display panel and the electronic device.
    Type: Application
    Filed: December 14, 2021
    Publication date: July 4, 2024
    Inventors: Chao TIAN, Yanqing GUAN, Guanghui LIU, Fei AI
  • 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: 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
  • Patent number: 11961490
    Abstract: Disclosed is a driving circuit, a display panel and a display device. The driving circuit includes a plurality of cascaded driving units, where a first staged driving unit includes a forward and backward scan control module, a node signal control module, an output control module, a first voltage stabilizing module, a first pull-down module, a second pull-down module and an electrical leakage control module. The electrical leakage control module is configured to maintain a voltage level of an output signal of the forward and backward scan control module.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: April 16, 2024
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Chao Tian, Yanqing Guan
  • Publication number: 20240096908
    Abstract: An array substrate is provided. The array substrate includes a substrate, a light-shielding layer, and an active layer. The light-shielding layer is disposed on the substrate, and the active layer is disposed on the light-shielding layer. Wherein, an orthographic projection of the active layer on the substrate is positioned within an orthographic projection of the light-shielding layer on the substrate. The present disclosure prevents the active layer from forming ramps and then breaking by allowing the orthographic projection of the active layer on the substrate to be positioned within the orthographic projection of the light-shielding layer on the substrate, thereby ensuring performances of the array substrate.
    Type: Application
    Filed: April 15, 2021
    Publication date: March 21, 2024
    Applicant: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Fuhsiung TANG, Yanqing GUAN, Congxing YANG
  • Publication number: 20240055535
    Abstract: A thin film transistor and a display panel are provided. A first dimension of a first transmission portion electrically connected to a source heavily-doped portion is different from a second dimension of a second transmission portion electrically connected to a drain heavily-doped portion, so that an intensity of an electric field of carriers transmitted by the transmission portion corresponding to the larger one of the first dimension or the second dimension is smaller when the thin film transistor is turned on, thereby reducing the bombardment effect of the carriers on a source or a drain and improving the stability of thin film transistor.
    Type: Application
    Filed: August 6, 2021
    Publication date: February 15, 2024
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Hong CHENG, Chao TIAN, Yanqing GUAN, Guanghui LIU
  • Publication number: 20240038130
    Abstract: The present application provides a display panel and a display device. An N-th auxiliary unit is arranged in a display area of the display panel. An output end of the N-th auxiliary unit is connected to an N-th scan line. By connecting the auxiliary unit arranged in the display area to the corresponding scan line, a falling edge of a scan signal transmitted in the scan line can have sharp falling or a rising edge of the scan signal can have sharp rising, which can alleviate a signal distortion problem caused by transmission delay in the display area.
    Type: Application
    Filed: June 8, 2021
    Publication date: February 1, 2024
    Inventors: Chao TIAN, Yanqing GUAN, Guanghui LIU, Fei AI
  • 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: 20240029608
    Abstract: The present application discloses a gate drive circuit and a display device. The gate drive circuit includes a plurality of cascaded gate drive units, in which one of the gate drive units includes a first layout, an input module and a pull-up module. By receiving a potential changeable signal by the gate of a first transistor or the gate of a second thin-film transistor, it can alleviate or avoid current leakage caused when a first node keeps at a same voltage level for a long time, thereby improving the stability of the potential of the first node.
    Type: Application
    Filed: July 15, 2021
    Publication date: January 25, 2024
    Applicant: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Mingyue LI, Chao TIAN, Yanqing GUAN, Fei AI, Guanghui LIU
  • Publication number: 20240021122
    Abstract: The present application discloses a gate driving circuit and a display panel. The gate driving circuit comprises a plurality of cascaded gate driving modules. A first driving signal can be output through a first output node, and at the same time, a second driving signal with a same phase as the first driving signal can be output through a second output node, and a gate driving sub-module and an in-phase output sub-module share the first output node and a pull-down node, which simplifies a circuit topology of the gate driving circuit.
    Type: Application
    Filed: August 31, 2021
    Publication date: January 18, 2024
    Applicant: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Mingyue Li, Chao Tian, Yanqing Guan, Fei Ai, Guanghui Liu