公开(公告)号：US12087238B2

公开(公告)日：2024-09-10

申请号：US18089813

申请日：2022-12-28

申请人： Wuhan Tianma Microelectronics Co., Ltd. ,  Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

发明人： Mengmeng Zhang ,  Xingyao Zhou ,  Yue Li

IPC分类号： G09G3/3266 ,  G09G3/3275 ,  G09G3/3283

CPC分类号： G09G3/3283 ,  G09G3/3266 ,  G09G2310/0286 ,  G09G2310/08

摘要： Provided are a display panel and a driving method for a display panel. The display panel includes multiple levels of shift registers which are cascaded, a clock signal line and a trigger signal line. The display panel comprises a current display mode which comprises a current FPS, a current trigger signal and a current clock signal, where the current FPS is the same as a refresh frequency of the current trigger signal. The display panel further comprises a reference display mode which comprises a reference FPS, a reference trigger signal and a reference clock signal. An effective action duration of the current trigger signal comprises a first stage, and in the first stage, a pulse width of the current clock signal is the same as a pulse width of the reference clock signal. The current FPS is less than a reference FPS in the reference display mode.

公开(公告)号：US11810514B2

公开(公告)日：2023-11-07

申请号：US17862749

申请日：2022-07-12

申请人： WUHAN TIANMA MICROELECTRONICS CO., LTD. ,  Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

发明人： Yana Gao ,  Xingyao Zhou ,  Yue Li

IPC分类号： G09G3/3258 ,  H10K59/121 ,  H10K59/131

CPC分类号： G09G3/3258 ,  H10K59/1213 ,  H10K59/131 ,  G09G2300/0426

摘要： A display panel, a method for driving the same, and a display apparatus are provided. A pixel driving circuit includes a driving transistor, a data writing circuit, and an adjusting circuit. The driving transistor has a gate electrically connected to a first node, and first and second electrodes respectively electrically connected to a second node and a third node. An operating period of the pixel driving circuit comprises a data writing period including first and second adjusting stages and a data writing period between the first and second adjusting stages. A data writing circuit is configured to provide a data signal to the second node during the data writing period. An adjusting circuit is configured to provide a first adjusting signal to the second node or the third node during the first adjusting stage, and to provide a second adjusting signal to the second node during the second adjusting stage.

公开(公告)号：US11763734B2

公开(公告)日：2023-09-19

申请号：US17833385

申请日：2022-06-06

申请人： WUHAN TIANMA MICROELECTRONICS CO., LTD. ,  Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

发明人： Xingyao Zhou ,  Yana Gao ,  Wei Liu ,  Kang Yang ,  Jian Kuang

IPC分类号： G09G3/00 ,  G09G3/32

CPC分类号： G09G3/32 ,  G09G3/006 ,  G09G2300/0809 ,  G09G2330/12

摘要： A display panel and a display apparatus are provided. The display panel includes data lines located in a display region, and a power bus, connection traces, and a control circuit that are located in a non-display region. The connection trace at least partially overlaps with the power bus in a direction perpendicular to a plane of the display panel, and has a first area that is an overlapping area between the connection trace and the power bus. The control circuit includes control transistors. A first electrode and/or a second electrode of the control transistor is coupled to the connection trace. The control transistors include a first control transistor and a second control transistor. The connection trace coupled to the first control transistor and the connection trace coupled to the second control transistor have different first areas. Channel areas of the first control transistor and the second control transistor are different.

公开(公告)号：US11749169B2

公开(公告)日：2023-09-05

申请号：US17864260

申请日：2022-07-13

申请人： WUHAN TIANMA MICROELECTRONICS CO., LTD. ,  Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

发明人： Mengmeng Zhang ,  Xingyao Zhou ,  Yue Li ,  Jian Kuang ,  Yuantao Wu ,  Jing Huang

IPC分类号： G09G3/20

CPC分类号： G09G3/2092 ,  G09G2310/0267 ,  G09G2320/0247

摘要： The present disclosure provides a display panel, a driving method, and a display apparatus. The display panel includes pixel circuits, the pixel circuits include: a drive transistor, with a gate electrically connected to a first node, a first electrode electrically connected to a second node; a voltage writing module, electrically connected to a first scanning signal line, a data line, and second node; a threshold compensation module, wherein a driving cycle of the pixel circuit includes a writing phase and a holding phase, writing phase includes a first non-light-emission period, and holding phase includes a second non-light-emission period; voltage writing module writes a display voltage into second node in first non-light-emission period in response to an enable level of first scanning signal, writes a node reset voltage into the second node in the second non-light-emission period in response to the enable level of the first scanning signal.

公开(公告)号：US11640796B2

公开(公告)日：2023-05-02

申请号：US17810612

申请日：2022-07-04

申请人： WUHAN TIANMA MICROELECTRONICS CO., LTD. ,  WUHAN TIANMA MICROELECTRONICS CO., LTD. SHANGHAI BRANCH

发明人： Mengmeng Zhang ,  Yana Gao ,  Xingyao Zhou

IPC分类号： G09G3/3266 ,  G09G3/3225

摘要： Provided is an output control device for providing control signals for a pixel circuit, which includes: a first output device configured to output a first control signal for controlling writing of a data signal into the pixel circuit, and a third output device configured to output a third control signal for controlling resetting of the light emitting element. A frequency of the third control signal is higher than a frequency of the first control signal.

公开(公告)号：US11521554B2

公开(公告)日：2022-12-06

申请号：US17542141

申请日：2021-12-03

申请人： Wuhan Tianma Microelectronics Co., Ltd. ,  Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

发明人： Mengmeng Zhang ,  Xingyao Zhou

IPC分类号： G09G3/3266

摘要： Provided are gate driver circuit, display panel, display device, and driving method thereof. The gate driver circuit includes cascaded shift registers. Each shift register includes input unit, node control unit, first output unit, and second output unit. first terminal, control terminal, and second terminal of the input unit respectively electrically connected to signal input terminal, first signal terminal, and first node. first terminal, second terminal, third terminal, fourth terminal, first control terminal, second control terminal and fifth terminal of the node control unit respectively electrically connected to the first node, the first signal terminal, first power supply voltage terminal, second power supply voltage terminal, the first node, second signal terminal, and second node. As such, one shift register outputs two control signals, the number of shift registers in the gate driver circuit can be reduced, and the bezel of the display panel and the display device can be reduced.

公开(公告)号：US20220335896A1

公开(公告)日：2022-10-20

申请号：US17857611

申请日：2022-07-05

申请人： WUHAN TIANMA MICROELECTRONICS CO., LTD. ,  Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

发明人： Jian Kuang ,  Xingyao Zhou ,  Yana Gao ,  Mengmeng Zhang ,  Gaojun Huang

IPC分类号： G09G3/3258 ,  G09G3/3291

摘要： A pixel driving circuit, a method for driving the same and a display panel are provided. In an embodiment, the pixel driving circuit includes: a driving circuit; a light-emitting circuit including a first electrode and a first reset circuit. In an embodiment, a working timing sequence of the pixel driving circuit includes working periods, one of which includes first and second light-emitting stages. In an embodiment, the first and second light-emitting stages each include a reset stage and a light-emitting stage, wherein, during the reset stage of the first light-emitting stage, the first reset circuit transmits a first reset voltage to the first electrode of the light-emitting circuit and during the reset stage of the second light-emitting stage, the first reset circuit transmits a modification reset voltage to the first electrode of the light-emitting circuit, the modification reset voltage being different from the first reset voltage.

公开(公告)号：US11475818B2

公开(公告)日：2022-10-18

申请号：US17236403

申请日：2021-04-21

申请人： WUHAN TIANMA MICROELECTRONICS CO., LTD. ,  WUHAN TIANMA MICROELECTRONICS CO., LTD. SHANGHAI BRANCH

发明人： Yana Gao ,  Xingyao Zhou ,  Mengmeng Zhang ,  Zhi Liu ,  Kang Yang

IPC分类号： G09G3/20 ,  G09G3/32

摘要： Provided are a display panel, a display device and a driving method of the display panel. In the same row of pixel units, first control terminals of data write modules of sub-pixels having a first color are connected to the same first scanning line; and in the same row of pixel units, first control terminals of data write modules of sub-pixels having other colors except the first color are connected to the same second scanning line. The data write module is configured to provide a data signal cached by a data line for the drive transistor. In the same row of the pixel units, within time of one frame of a picture, time of providing data signals for data lines connected to sub-pixels having the first color is within time of writing data signals cached by data lines into pixel circuits of sub-pixels having the other colors.

公开(公告)号：US20220301499A1

公开(公告)日：2022-09-22

申请号：US17833385

申请日：2022-06-06

申请人： WUHAN TIANMA MICROELECTRONICS CO., LTD. ,  Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

发明人： Xingyao Zhou ,  Yana Gao ,  Wei Liu ,  Kang Yang ,  Jian Kuang

IPC分类号： G09G3/32 ,  G09G3/00

摘要： A display panel and a display apparatus are provided. The display panel includes data lines located in a display region, and a power bus, connection traces, and a control circuit that are located in a non-display region. The connection trace at least partially overlaps with the power bus in a direction perpendicular to a plane of the display panel, and has a first area that is an overlapping area between the connection trace and the power bus. The control circuit includes control transistors. A first electrode and/or a second electrode of the control transistor is coupled to the connection trace. The control transistors include a first control transistor and a second control transistor. The connection trace coupled to the first control transistor and the connection trace coupled to the second control transistor have different first areas. Channel areas of the first control transistor and the second control transistor are different.

公开(公告)号：US11676537B2

公开(公告)日：2023-06-13

申请号：US17837996

申请日：2022-06-10

申请人： WUHAN TIANMA MICROELECTRONICS CO., LTD. ,  Wuhan Tianma Microelectronics Co., Ltd. Shanghai Branch

发明人： Mengmeng Zhang ,  Xingyao Zhou ,  Yue Li ,  Jian Kuang ,  Yuantao Wu

IPC分类号： G09G3/3233

CPC分类号： G09G3/3233 ,  G09G2300/043 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/0251 ,  G09G2310/08 ,  G09G2320/02

摘要： Provided is a pixel driving circuit, a display panel and a display apparatus. The pixel driving circuit includes: driving transistor having gate electrode connected to first node, first electrode connected to second node, and second electrode electrically connected to third node coupled to light emitting element; storage capacitor connected to the first node; and M first transistors having M first and second electrodes connected to the first node M functional signal terminals, respectively, M≥1. A driving cycle of the pixel driving circuit includes light-emitting stage and N non-light-emitting stages, N≥M. The M first transistors are respectively turned on in the N non-light-emitting stages, and the M first transistors are all turned off in the light-emitting stage. One of the N non-light-emitting stages includes first non-light-emitting stage adjacent to the light-emitting stage. Channel length L and width W of the first transistor satisfy:





W
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L