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公开(公告)号：US20190156777A1
公开(公告)日：2019-05-23
申请号：US15745098
申请日：2017-11-27
Inventor： Juncheng XIAO , Yanqing GUAN
IPC: G09G3/36 , G02F1/1345 , H01L27/12
Abstract: This invention provides a GOA circuit comprising m cascaded GOA units. An n-th GOA unit includes an output control module, a forward/backward scanning control module, a node signal control module, a second pull-down circuit, a first pull-down circuit and a pull-up circuit. The forward/backward scanning control module control the GOA circuit to perform a forward or a backward scanning. The output control module controls an output of an n-th gate driving signal. The first pull-down circuit comprises a seventh thin film transistor. The second pull-down circuit comprises a fifth thin film transistor. The node signal control module control the fifth thin film transistor. The pull-up circuit includes an eighth thin film transistor. After the LCD panel is powered off, the second global control signal becomes a low level. This invention can eliminate a ghost image in the LCD panel when electricity is powered off, and improve user experience.
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公开(公告)号：US20250087162A1
公开(公告)日：2025-03-13
申请号：US18248578
申请日：2023-03-29
Inventor： Mingyue LI , Chao TIAN , Yanqing GUAN , Fei AI , Guanghui LIU
IPC: G09G3/3266 , G09G3/32
Abstract: The present application provides a display panel and a display device, the display panel includes: N scan lines, the N is an integer greater than or equal to 1; and J sets of forward and reverse scan pull-down circuits, each set of the forward and reverse scan pull-down circuits includes N forward and reverse scan pull-down modules, at least a part of each of the forward and reverse scan pull-down modules is disposed in the display subarea, and the J is an integer greater than or equal to 1. In each set of the forward and reverse scan pull-down circuits, output terminals of the N forward and reverse scan pull-down modules are connected to the N scan lines in a one-to-one correspondence.
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公开(公告)号：US20240221564A1
公开(公告)日：2024-07-04
申请号：US17596876
申请日：2021-12-14
Inventor： Chao TIAN , Yanqing GUAN , Guanghui LIU , Fei AI
CPC classification number: G09G3/20 , H01L27/124 , G09G2310/0281
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.
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公开(公告)号：US20230100833A1
公开(公告)日：2023-03-30
申请号：US16975164
申请日：2020-06-30
Inventor： Juncheng XIAO , Chao TIAN , Yanqing GUAN , Yongxiang ZHOU
IPC: G06V40/13 , H03F3/04 , G06V10/147
Abstract: A fingerprint readout circuit and a display panel are disclosed. The fingerprint readout circuit includes a voltage amplifier unit, a fingerprint readout unit, and a source follower unit. The voltage amplifier unit is coupled to the fingerprint readout unit and the source follower unit, and the fingerprint readout unit is coupled to the source follower unit. The fingerprint readout circuit has both current and voltage amplification functions. Therefore, a voltage difference is amplified, facilitating reading out fingerprint signals accurately and enhancing fingerprint readout precision and accuracy.
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公开(公告)号：US20220293062A1
公开(公告)日：2022-09-15
申请号：US16971483
申请日：2020-07-21
Inventor： Chao TIAN , Yanqing GUAN
IPC: G09G3/36
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.
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Patent Agency Ranking
公开(公告)号：US20210383768A1
公开(公告)日：2021-12-09
申请号：US16970642
申请日：2020-06-24
Inventor： Haiming CAO , Yanqing GUAN
IPC: G09G3/36
Abstract: In a pixel driving circuit and a display panel provided, a first transistor or a second transistor is controlled to maintain that the first transistor or the second transistor is normally turned on. The one of the transistors that is normally turned on is coupled to a common terminal. The other of the transistors serves as a driving switch that receives a row scan signal and a data signal to charge a liquid crystal capacitor and a storage capacitor. Thus, when the pixel driving circuit is in the low-frequency state or the high-frequency state, the first transistor and the second transistor can alternately operate to satisfy different operating requirements.
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公开(公告)号：US20200226993A1
公开(公告)日：2020-07-16
申请号：US16342207
申请日：2018-08-16
Inventor： Xin ZHANG , Juncheng XIAO , Chao TIAN , Yanqing GUAN
IPC: G09G3/36
Abstract: A GOA circuit, a display panel and a display apparatus are provided. The GOA circuit includes: a forward/backward scanning control module configured to control, according to a forward scanning control signal or a backward scanning control signal, the GOA circuit to perform forward scanning or backward scanning, the level of an output signal from the forward/backward scanning control module being greater than a preset value; and, an output control module configured to control, according to a clock signal in a current level, the output of a gate driving signal in the current level.
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公开(公告)号：US20200082746A1
公开(公告)日：2020-03-12
申请号：US16342209
申请日：2018-09-11
Inventor： Xin ZHANG , Juncheng XIAO , Yanqing GUAN , Chao TIAN
IPC: G09G3/20
Abstract: A pixel driving circuit is provided. The pixel driving circuit comprises a reset module, a compensation module and light emitting module, wherein the reset module is configured to transmit a data signal to the compensation module to reset the compensation module under controlling of a first driving signal, the compensation module is configured to write the data signal to compensate a threshold voltage under controlling of a second driving signal, and the light emitting module is configured to emit light under controlling of a third driving signal.
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公开(公告)号：US20200035181A1
公开(公告)日：2020-01-30
申请号：US16342208
申请日：2018-09-26
Inventor： Xin ZHANG , Juncheng XIAO , Yanqing GUAN , Chao TIAN
IPC: G09G3/36
Abstract: A gate driver of array (GOA) circuit and a display device are disclosed. An n-th sub-circuit in the GOA circuit includes a control module, an output module, a pull-up supplement module, and a leakage switch. The control module is electrically connected to a positive scan control terminal, a negative scan control terminal, an (n−2)th scan terminal, an (n+2)th scan terminal, an (n+1)th clock terminal, an (n−1)th clock terminal, a high voltage terminal, and a low voltage terminal. The output module is electrically connected to the high voltage terminal, the low voltage terminal, an n-th clock terminal, an n-th scan terminal, and a controllable terminal. The pull-up supplement module includes a supplement switch that is electrically connected to the high voltage terminal, the control module, and the output module. The leakage switch is electrically connected to the control module, the output module, the supplement switch, and the low voltage terminal.
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公开(公告)号：US20190385556A1
公开(公告)日：2019-12-19
申请号：US15740742
申请日：2017-11-29
Inventor： Yanqing GUAN
IPC: G09G3/36
Abstract: The present invention provides a GOA circuit, which includes, which includes multi-stage GOA circuit repeat unit that are cascade connected, and each stage of the GOA circuit repeat units includes: a first pull-up control module (101), a first pull-down holding module (102), a first pull-down module (106), a first bootstrap capacitor module (103), a first output module (104), a second output module (105), a second pull-up control module (201), a second pull-down holding module (202), a second pull-down module (206), a second bootstrap capacitor module (203), a third output module (204) and a fourth output module (205). The present invention can reduce the number of thin film transistors (TFTs) in the GOA circuit for realizing a narrow-border design as well as reducing power consumption of the GOA circuit.
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