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公开(公告)号：US20230102348A1
公开(公告)日：2023-03-30
申请号：US16961956
申请日：2020-06-12
Inventor： Haiming CAO , Yanqing GUAN
IPC: G09G3/20
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.
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公开(公告)号：US20210408072A1
公开(公告)日：2021-12-30
申请号：US16769254
申请日：2020-02-28
Inventor： Juncheng XIAO , Chao TIAN , Yanqing GUAN , Haiming CAO
Abstract: A display panel, a gate electrode driving circuit, and an electronic device are provided. The display panel includes a first metal layer including a first gate electrode; a second metal layer including a first source electrode, a first drain electrode, and a second gate electrode; two ends of a polycrystalline silicon semiconductor layer electrically connected to the first source electrode and the first drain electrode respectively; a third metal layer including a second source electrode and a second drain electrode; and two ends of a metal oxide semiconductor layer electrically connected to the second source electrode and the second drain electrode respectively.
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公开(公告)号：US20250098307A1
公开(公告)日：2025-03-20
申请号：US18567221
申请日：2023-09-26
Inventor： Haiming CAO , Chao TIAN , Shiyu LONG , Chunpeng ZHANG , Fei AI , Chungching HSIEH , Jianfeng YUAN
IPC: H01L27/12 , G02F1/1368 , H01L29/786
Abstract: An array substrate, a display panel, and a display device are provided. The array substrate includes a base; a buffer layer and a thin film transistor. The buffer layer is provided on the base and includes a first buffer layer and a second buffer layer. The first buffer layer is disposed between the second buffer layer and the base. A refractive index of the first buffer layer is greater than a refractive index of the base and a refractive index of the second buffer layer. A ratio of the refractive index of the first buffer layer to the refractive index of the base is less than or equal to 1.25. The thin film transistor is provided on a side of the buffer layer away from the base.
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公开(公告)号：US20240029609A1
公开(公告)日：2024-01-25
申请号：US17441303
申请日：2021-08-06
Inventor： Haiming CAO , Chao TIAN , Yanqing GUAN , Fei AI , Guanghui LIU
IPC: 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：US20240296767A1
公开(公告)日：2024-09-05
申请号：US17915517
申请日：2022-09-01
Inventor： Haiming CAO , Chao TIAN , Fei AI , Guanghui LIU
IPC: G09G3/20
CPC classification number: G09G3/20 , G09G2310/0251 , G09G2310/0267 , G09G2320/0223
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.
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Patent Agency Ranking
公开(公告)号：US20220189397A1
公开(公告)日：2022-06-16
申请号：US17057664
申请日：2020-09-16
Inventor： Haiming CAO , Chao TIAN
IPC: G09G3/3233 , H01L27/32
Abstract: A pixel circuit and a display panel related to the field of display technology are provided. The pixel circuit and the display panel include a driving transistor, a first transistor, a second transistor, a first capacitor, and a second capacitor. The pixel circuit and the display panel, before emitting light, preset an electric potential of a gate, a drain, and a source of a driving transistor. As a result, a light-emitting current passing the driving transistor can be immune from a threshold voltage of the driving transistor during luminescence, further eliminating an ununiform luminescence phenomenon due to a drift of the threshold voltage.
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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：US20210358386A1
公开(公告)日：2021-11-18
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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公开(公告)号：US20250078728A1
公开(公告)日：2025-03-06
申请号：US18247256
申请日：2023-02-08
Inventor： Chao TIAN , Mingyue LI , Yanqing GUAN , Haiming CAO , Fei AI , Guanghui LIU
IPC: G09G3/32
Abstract: An embodiment of the present disclosure is directed to a display panel. The display panel includes a plurality of scan lines and a plurality of forward and reverse scan pull-down circuit. The plurality of scan lines is located on the display area. Each of the forward and reverse scan pull-down circuits includes a forward scan control module, a reverse scan control module, and a pull-down module located on a display area. The pull-down module includes an output terminal and a control terminal coupled to an output terminal of the forward scan control module and an output terminal of the reverse scan control module.
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公开(公告)号：US20240119883A1
公开(公告)日：2024-04-11
申请号：US17976803
申请日：2022-10-30
Inventor： Haiming CAO , Chao TIAN , Fei AI , Guanghui LIU
CPC classification number: G09G3/2014 , G09G3/32 , G09G2300/0842 , G09G2310/0264 , G09G2310/08 , G09G2320/0242 , G09G2320/0633
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.
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