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公开(公告)号：US12142191B2
公开(公告)日：2024-11-12
申请号：US17260994
申请日：2020-09-11
Inventor： Haiming Cao , Yanqing Guan
IPC: G09G3/32
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.
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公开(公告)号：US12118909B2
公开(公告)日：2024-10-15
申请号：US17434561
申请日：2021-06-18
Inventor： Haiming Cao
IPC: G09G3/20
CPC classification number: G09G3/20 , G09G2300/0408 , G09G2310/0267
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.
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公开(公告)号：US11615726B2
公开(公告)日：2023-03-28
申请号：US17056795
申请日：2020-09-25
Inventor： Haiming Cao
IPC: G09G3/20
Abstract: A gate driving circuit and a display device are provided. The gate driving circuit includes a plurality of gate driving units, each of the gate driving units Each of the stage of the gate driving unit comprises two driving signal output units and a cascading signal output unit. The two driving signal output units can in turn output a constant high voltage signal and a wave signal such that a gate driving circuit could output two driving signals at the same time. In contrast to the conventional art, which needs two gate driving circuits to output two driving signals, this embodiment of the present invention could reduce the number of the clock line and the number of the TFTs such that the display device could have a narrow side frame.
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公开(公告)号：US12020614B2
公开(公告)日：2024-06-25
申请号：US17441303
申请日：2021-08-06
Inventor： Haiming Cao , Chao Tian , Yanqing Guan , Fei Ai , Guanghui Liu
IPC: G09G3/3266 , G09G3/20
CPC classification number: G09G3/20 , G09G2310/0267 , G09G2310/08 , G09G2320/045
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.
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公开(公告)号：US11996062B2
公开(公告)日：2024-05-28
申请号：US17419876
申请日：2021-05-31
Inventor： Yanqing Guan , Chao Tian , Haiming Cao
IPC: G09G3/36
CPC classification number: G09G3/3677 , G09G2300/0876
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.
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Patent Agency Ranking
公开(公告)号：US20240021117A1
公开(公告)日：2024-01-18
申请号：US17434561
申请日：2021-06-18
Inventor： Haiming Cao
IPC: G09G3/20
CPC classification number: G09G3/20 , G09G2300/0408 , G09G2310/0267
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.
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公开(公告)号：US11257456B2
公开(公告)日：2022-02-22
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：US12165609B2
公开(公告)日：2024-12-10
申请号：US17613579
申请日：2021-09-06
Inventor： Haiming Cao , Chao Tian , Yanqing Guan , Fei Ai , Guanghui Liu , Zhifu Li
IPC: G09G3/36
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.
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公开(公告)号：US20230274688A1
公开(公告)日：2023-08-31
申请号：US17260994
申请日：2020-09-11
Inventor： Haiming Cao , Yanqing Guan
IPC: G09G3/32
CPC classification number: G09G3/32 , G09G2300/0842 , G09G2320/0233 , G09G2330/021 , G09G2320/0214
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.
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公开(公告)号：US11250765B2
公开(公告)日：2022-02-15
申请号：US16979550
申请日：2020-06-15
Inventor： Haiming Cao , Chao Tian
IPC: G09G3/20
Abstract: A display driving circuit is provided. The display driving circuit includes a multi-stage driving unit, and each stage of the driving unit includes a pull-up control unit and a pull-up unit. The pull-up unit is electrically connected to a second high voltage signal input terminal, so that high voltage signal input from the second high voltage signal input terminal is directly transmitted to a cascade signal output terminal through the pull-up unit, which further enables the display driving circuit to output a high voltage driving signal while a gate of a thin film transistor inside the display driving circuit is kept at low voltage.
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