Patents by Inventor Longfei FAN

Longfei FAN 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: 20250140184
    Abstract: An array base plate includes a substrate; a plurality of sub-pixels; and a plurality of gate lines and a plurality of data lines, wherein the plurality of gate lines intersect with the plurality of data lines, each of the sub-pixels is located at a position limited by two adjacent gate lines and two adjacent data lines, and each of the sub-pixels includes a pixel driving circuit and a light emitting device that are connected; wherein the pixel driving circuit includes: a drive module and a first control module, the pixel driving circuit further includes an auxiliary anode, the auxiliary anode is located between the anode and the substrate, and the auxiliary anode is electrically connected to the anode; the first power signal line includes a first part and a second part that are electrically connected.
    Type: Application
    Filed: January 4, 2023
    Publication date: May 1, 2025
    Applicants: YUNNAN INVENSIGHT OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE Technology Group Co., Ltd.
    Inventors: Longfei Fan, Yaoxi Ma, Xiaochuan Chen, Qingshan Shan, Pengcheng Lu, Shengji Yang, Shanghong Jiang
  • Publication number: 20250127020
    Abstract: A display module, including: a display panel; a color film layer, provided on a light-emitting side of the display panel, where the color film layer includes a plurality of light-filtering portions; and a micro-lens layer, provided on a side of the color film layer away from the display panel; where, the micro-lens layer includes a plurality of first converging lenses and a plurality of second converging lenses, a gap is provided between two adjacent first converging lenses, and an orthographic projection of a first converging lens on the display panel is located within an orthographic projection of a light-filtering portion on the display panel; a second converging lens is provided in the gap between two adjacent first converging lenses, and the second converging lens is connected to the first converging lens.
    Type: Application
    Filed: October 21, 2021
    Publication date: April 17, 2025
    Inventors: Zhijian ZHU, Pengcheng LU, Shengji YANG, Kuanta HUANG, Xiaochuan CHEN, Qian WU, Longfei FAN, Dacheng ZHANG
  • Patent number: 12266317
    Abstract: A pixel circuit, a driving method, and a display device. The pixel circuit includes a light-emitting element, a data writing circuit, a first control circuit, a driving circuit, a first power storage circuit, and a second power storage circuit. The first control circuit is configured to write a first initial voltage provided by a first initial voltage terminal into a first electrode of the light-emitting element under control of a first control signal provided by a first control terminal in a non-light-emitting phase. The driving circuit drives the light-emitting element to emit light under the control of a potential of a control terminal of the driving circuit. The present disclosure enhances the contrast in the non-light-emitting phase.
    Type: Grant
    Filed: June 24, 2022
    Date of Patent: April 1, 2025
    Assignees: Yunnan Invensight Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Longfei Fan, Xiaochuan Chen, Pengcheng Lu
  • Publication number: 20250087152
    Abstract: A display substrate includes an array substrate including pixels and pixel driving circuits. A pixel driving circuit includes a driving sub-circuit and a storage sub-circuit. The storage sub-circuit includes: a first capacitor coupled to a first node and a second node, and a second capacitor coupled to the second node and a first voltage signal terminal. The driving sub-circuit is configured to generate a driving current under control of the storage sub-circuit and transmit the driving current to a light-emitting device. In a direction perpendicular to the array layer, the first plate, the second plate, the third plate and the fourth plate have an overlapping region therebetween.
    Type: Application
    Filed: December 19, 2022
    Publication date: March 13, 2025
    Inventors: Longfei FAN, Yaoxi MA, Dachao LI, Shanghong JIANG, Pengcheng LU, Shengji YANG, Xiaochuan CHEN
  • Publication number: 20250078718
    Abstract: Provided is a gate drive circuit, including a plurality of shift registers and buffers in cascade, wherein each of the shift registers is configured to output a first gate scanning signal stage by stage according to a preset scanning timing; and each of the buffers is configured to perform waveform inversion on the first gate scanning signal for a plurality of times to convert the first gate scanning signal into a second gate scanning signal, wherein falling edge time of the second gate scanning signal is less than falling edge time of the first gate scanning signal.
    Type: Application
    Filed: July 31, 2023
    Publication date: March 6, 2025
    Inventors: Shanghong JIANG, Dachao LI, Longfei FAN, Yaoxi MA, Pengcheng LU, Shengji YANG, Xiaochuan CHEN
  • Patent number: 12238986
    Abstract: This disclosure provides a display device, a display panel, and a fabrication method thereof. The display panel includes a driving backplane, a first electrode layer, a pixel definition layer, a light-emitting functional layer, and a second electrode layer. The first electrode layer is arranged on a side surface of the driving backplane and includes a first electrode and a transferring ring. The pixel definition layer covers the first electrode layer and the driving backplane. The light-emitting functional layer is arranged on a surface of the first electrode layer facing away from the driving backplane, and the light-emitting functional layer is in a range of a transferring area of the driving backplane. The second electrode layer covers the pixel definition layer and the light-emitting functional layer. A boundary of the second electrode layer is inside a boundary of the pixel definition layer and is connected with the transferring ring.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: February 25, 2025
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yunlong Li, Pengcheng Lu, Longfei Fan, Dongsheng Li, Zhijian Zhu, Yuanlan Tian
  • Patent number: 12225768
    Abstract: A display panel and a display apparatus are provided. The display panel includes a base substrate including a pixel circuit and a light-emitting element. The pixel circuit includes a data writing sub-circuit, a storage sub-circuit, a driver sub-circuit and a first sub-circuit. The data writing sub-circuit is configured to transmit a data signal to a first terminal of the storage sub-circuit in response to a control signal. A control electrode of the driver sub-circuit is coupled to the storage sub-circuit, a first electrode of the driver sub-circuit is configured to receive a first power supply voltage, and a second electrode is coupled to a first electrode of the light-emitting element. The first sub-circuit includes a first transistor, where a gate and a first electrode of the first transistor are both coupled to the same electrode of the driver sub-circuit.
    Type: Grant
    Filed: February 20, 2021
    Date of Patent: February 11, 2025
    Assignee: BOE Technology Group., Co., Ltd.
    Inventors: Zhijian Zhu, Longfei Fan, Pengcheng Lu, Xiaochuan Chen, Qian Wu
  • Patent number: 12217705
    Abstract: A driving circuit, a driving method, a display device, and a display control method are provided. The driving circuit includes multi-stage driving units and an on/off control circuit. Each of the driving units includes an input end and a driving signal output end, and each of the driving units is configured for outputting a corresponding driving signal via the driving signal output end according to an input signal provided by the input end. The input end of a first-stage driving unit is electrically connected to a start signal end. The on/off control circuit is electrically connected to an on/off control end and input ends of the multi-stage driving units, and configured for controlling the electric connection or electric disconnection of the input ends of the multi-stage driving units under the control of an on/off control signal provided by the on/off control end.
    Type: Grant
    Filed: June 24, 2022
    Date of Patent: February 4, 2025
    Assignees: Yunnan Invensight Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yaoxi Ma, Longfei Fan, Shanghong Jiang, Pengcheng Lu, Shengji Yang, Xiaochuan Chen, Dachao Li
  • Publication number: 20240404471
    Abstract: The line drive signal enhancement circuit includes a first control unit, a second control unit, a first output unit and a second output unit. The first control unit is used for outputting the first power supply voltage to the first node or the second node under the control of the first control terminal and the second control terminal. The second control unit is used for outputting the second power supply voltage to the second node in response to the first power supply voltage on the first node, and is further used for outputting the second power supply voltage to the first node in response to the first power supply voltage on the second node.
    Type: Application
    Filed: July 3, 2024
    Publication date: December 5, 2024
    Inventors: Dongsheng LI, Longfei FAN, Qian WU
  • Publication number: 20240395199
    Abstract: A pixel circuit includes a light emitting element, a driving circuit, a first energy storage circuit, a second energy storage circuit, and a writing-in control circuit; a first terminal of the first energy storage circuit is electrically connected to a control terminal of the driving circuit and a first terminal of the writing-in control circuit respectively, and a second terminal of the first energy storage circuit is electrically connected to a first terminal of driving circuit, a first terminal of the second energy storage circuit is electrically connected to a second terminal of the writing-in control circuit, and a second terminal of the second energy storage circuit is electrically connected to the writing-in terminal.
    Type: Application
    Filed: May 31, 2022
    Publication date: November 28, 2024
    Applicants: YUNNAN INVENSIGHT OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Dachao LI, Zhijian ZHU, Shengji YANG, Xiaochuan CHEN, Junyan YANG, Pengcheng LU, Longfei FAN
  • Publication number: 20240395200
    Abstract: A display substrate, a manufacturing method thereof and a display apparatus are provided. The display substrate includes multiple sub-pixels, a sub-pixel includes a first region (q1), a gap region (q3) and a second region (q2); the sub-pixel includes a first transistor (T1) including first active layer (1) and first gate electrode (11), a second transistor (T2) including second active layer (2) and second gate electrode (12) and a third transistor (T3) including third active layer (3) and third gate electrode (13); the first active layer is disposed in the first region, the second active layer and the third active layer are disposed in the second region, and via holes through which the first gate electrode and the third gate electrode are connected to a scan signal line and a via hole through which the second gate electrode is connected to the first transistor are provided in the gap region.
    Type: Application
    Filed: July 29, 2022
    Publication date: November 28, 2024
    Inventors: Ning CONG, Longfei FAN, Dachao LI, Can ZHANG, Minghua XUAN, Xiaochuan CHEN
  • Patent number: 12154495
    Abstract: An array base plate includes a silicon substrate including multiple cascaded EOA units disposed at a peripheral area; the EOA units are electrically connected to a pixel driving unit; each EOA unit includes an input circuit transmitting a signal input by a light-emitting control signal input line to the EOA unit; a first control circuit transmitting a second power signal input by a second power signal line to a first node, and transmitting a first power signal input by a first power signal line to a second node; a second control circuit transmitting a second clock signal to a third node or transmitting the second power signal to the third node; a pull-up circuit transmitting the first power signal to a light-emitting control signal output line, and a pull-down circuit transmitting the second power signal to the light-emitting control signal output line.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: November 26, 2024
    Assignees: YUNNAN INVENSIGHT OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE Technology Group Co., Ltd.
    Inventors: Yaoxi Ma, Longfei Fan, Pengcheng Lu, Shengji Yang, Xiaochuan Chen, Shanghong Jiang, Zhijian Zhu, Huaiyun Fan
  • Publication number: 20240304153
    Abstract: A pixel circuit, a driving method, and a display device. The pixel circuit includes a light-emitting element, a data writing circuit, a first control circuit, a driving circuit, a first power storage circuit, and a second power storage circuit. The first control circuit is configured to write a first initial voltage provided by a first initial voltage terminal into a first electrode of the light-emitting element under control of a first control signal provided by a first control terminal in a non-light-emitting phase. The driving circuit drives the light-emitting element to emit light under the control of a potential of a control terminal of the driving circuit. The present disclosure enhances the contrast in the non-light-emitting phase.
    Type: Application
    Filed: June 24, 2022
    Publication date: September 12, 2024
    Applicants: Yunnan Invensight Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Longfei Fan, Xiaochuan Chen, Pengcheng Lu
  • Publication number: 20240296802
    Abstract: A driving circuit, a driving method, a display device, and a display control method are provided. The driving circuit includes multi-stage driving units and an on/off control circuit. Each of the driving units includes an input end and a driving signal output end, and each of the driving units is configured for outputting a corresponding driving signal via the driving signal output end according to an input signal provided by the input end. The input end of a first-stage driving unit is electrically connected to a start signal end. The on/off control circuit is electrically connected to an on/off control end and input ends of the multi-stage driving units, and configured for controlling the electric connection or electric disconnection of the input ends of the multi-stage driving units under the control of an on/off control signal provided by the on/off control end.
    Type: Application
    Filed: June 24, 2022
    Publication date: September 5, 2024
    Applicants: Yunnan Invensight Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yaoxi Ma, Longfei Fan, Shanghong Jiang, Pengcheng Lu, Shengji Yang, Xiaochuan Chen, Dachao Li
  • Patent number: 12073784
    Abstract: The line drive signal enhancement circuit includes a first control unit, a second control unit, a first output unit and a second output unit. The first control unit is used for outputting the first power supply voltage to the first node or the second node under the control of the first control terminal and the second control terminal. The second control unit is used for outputting the second power supply voltage to the second node in response to the first power supply voltage on the first node, and is further used for outputting the second power supply voltage to the first node in response to the first power supply voltage on the second node.
    Type: Grant
    Filed: May 31, 2021
    Date of Patent: August 27, 2024
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Dongsheng Li, Longfei Fan, Qian Wu
  • Publication number: 20240265861
    Abstract: An array base plate includes a silicon substrate including multiple cascaded EOA units disposed at a peripheral area; the EOA units are electrically connected to a pixel driving unit; each EOA unit includes an input circuit transmitting a signal input by a light-emitting control signal input line to the EOA unit; a first control circuit transmitting a second power signal input by a second power signal line to a first node, and transmitting a first power signal input by a first power signal line to a second node; a second control circuit transmitting a second clock signal to a third node or transmitting the second power signal to the third node; a pull-up circuit transmitting the first power signal to a light-emitting control signal output line, and a pull-down circuit transmitting the second power signal to the light-emitting control signal output line.
    Type: Application
    Filed: June 29, 2022
    Publication date: August 8, 2024
    Applicants: Yunnan Invensight Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Yaoxi Ma, Longfei Fan, Pengcheng Lu, Shengji Yang, Xiaochuan Chen, Shanghong Jiang, Zhijian Zhu, Huaiyun Fan
  • Publication number: 20240242649
    Abstract: A driving circuit includes a driving signal output terminal, a first node control circuit, an on-off control circuit and a first output circuit. The first node control circuit controls to connect or disconnect the first node and the first voltage terminal under the control of a first control signal, and control to connect or disconnect the first node and the first voltage terminal under the control of a first clock signal; the first control terminal is different from the first clock signal terminal. The on-off control circuit controls to connect or disconnect the first node and the first output control terminal under the control of a second voltage signal; the first output circuit controls to connect or disconnect the driving signal output terminal and the first clock signal terminal under the control of a potential of the first output control terminal.
    Type: Application
    Filed: November 23, 2021
    Publication date: July 18, 2024
    Inventors: Longfei FAN, Pengcheng LU
  • Publication number: 20240221643
    Abstract: The line drive signal enhancement circuit includes a first control unit, a second control unit, a first output unit and a second output unit. The first control unit is used for outputting the first power supply voltage to the first node or the second node under the control of the first control terminal and the second control terminal. The second control unit is used for outputting the second power supply voltage to the second node in response to the first power supply voltage on the first node, and is further used for outputting the second power supply voltage to the first node in response to the first power supply voltage on the second node.
    Type: Application
    Filed: May 31, 2021
    Publication date: July 4, 2024
    Inventors: Dongsheng LI, Longfei FAN, Qian WU
  • Patent number: 12002421
    Abstract: The present disclosure provides a line drive signal enhancement circuit, a shift register unit, and a display panel, and relates to the technical field of display. The line drive signal enhancement circuit includes a control unit, an inverter unit, a first output unit and a second output unit. The control unit has a first peripheral control terminal and a second peripheral control terminal respectively loaded with two inverted signals, and the input terminal is electrically connected with the first power supply lead. The first output unit and the second output unit both have two input terminals. The two input terminals are respectively electrically connected with the first power supply lead and the second power supply lead. The output terminal of the control unit is electrically connected with the control terminal of the first output unit and/or the control terminal of the second output unit.
    Type: Grant
    Filed: May 31, 2021
    Date of Patent: June 4, 2024
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yunlong Li, Longfei Fan, Qian Wu
  • Publication number: 20240153450
    Abstract: The present disclosure provides a line drive signal enhancement circuit, a shift register unit, and a display panel, and relates to the technical field of display. The line drive signal enhancement circuit includes a control unit, an inverter unit, a first output unit and a second output unit. The control unit has a first peripheral control terminal and a second peripheral control terminal respectively loaded with two inverted signals, and the input terminal is electrically connected with the first power supply lead. The first output unit and the second output unit both have two input terminals. The two input terminals are respectively electrically connected with the first power supply lead and the second power supply lead. The output terminal of the control unit is electrically connected with the control terminal of the first output unit and/or the control terminal of the second output unit.
    Type: Application
    Filed: May 31, 2021
    Publication date: May 9, 2024
    Inventors: Yunlong LI, Longfei FAN, Qian WU