公开(公告)号：US20230222962A1

公开(公告)日：2023-07-13

申请号：US17929825

申请日：2022-09-06

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

发明人： Mengjia He ,  Yana Gao ,  Zhi Liu ,  Yuying Cai ,  Xingyao Zhou

IPC分类号： G09G3/32

CPC分类号： G09G3/32 ,  G09G2330/04 ,  G09G2330/021

摘要： A display panel and a display device, including a substrate, a circuit layer located at a side of the substrate, and a top light-shielding layer configured to receive a voltage signal. The circuit layer includes a light-emitting shift circuit, including a first output module and a control module. The first output module is electrically connected to a first node, a first fixed potential signal line, and a light-emitting control signal line and is configured to, in response to a voltage of the first node, transmit a light-emitting enable voltage provided by the first fixed-potential signal line to the light-emitting control signal line. The control module is connected to the first node and includes a control transistor. The top light-shielding layer is located at a side of the control transistor. In a direction perpendicular to the substrate, the top light-shielding layer overlaps with a channel of the control transistor.

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：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：US12033578B1

公开(公告)日：2024-07-09

申请号：US18195621

申请日：2023-05-10

申请人： Wuhan Tianma Micro-Electronics Co., Ltd. ,  Wuhan Tianma MicroElectronics Co., Ltd. Shanghai Branch

发明人： Yue Li ,  Peng Zhang ,  Mengmeng Zhang ,  Xueqi Tian ,  Shuai Yang ,  Yana Gao ,  Gaojun Huang

IPC分类号： G09G3/3233

CPC分类号： G09G3/3233 ,  G09G2300/0842 ,  G09G2310/061 ,  G09G2320/0247

摘要： A driving method of a display panel and a display panel are provided. Time for displaying one frame includes N times of first node potential adjustment stages, a data writing stage, and at least one first bias stress stage; the data writing stage is after the first node potential adjustment stage and before the first bias stress stage; the N times first node potential adjustment stage include N reset stages and N first adjustment voltage writing stages; and an i-th first voltage writing stage is after an i-th reset stage. In the reset stage, the first reset module is turned on to write a reset signal to the first node; in the first adjustment voltage writing phase, the first reset module is turned off, and the compensation module is turned on to write a first adjustment voltage into the first node to adjust the bias state of the driving transistor.

公开(公告)号：US11900863B2

公开(公告)日：2024-02-13

申请号：US17929825

申请日：2022-09-06

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

发明人： Mengjia He ,  Yana Gao ,  Zhi Liu ,  Yuying Cai ,  Xingyao Zhou

IPC分类号： G09G3/32

CPC分类号： G09G3/32 ,  G09G2330/021 ,  G09G2330/04

摘要： A display panel and a display device, including a substrate, a circuit layer located at a side of the substrate, and a top light-shielding layer configured to receive a voltage signal. The circuit layer includes a light-emitting shift circuit, including a first output module and a control module. The first output module is electrically connected to a first node, a first fixed potential signal line, and a light-emitting control signal line and is configured to, in response to a voltage of the first node, transmit a light-emitting enable voltage provided by the first fixed-potential signal line to the light-emitting control signal line. The control module is connected to the first node and includes a control transistor. The top light-shielding layer is located at a side of the control transistor. In a direction perpendicular to the substrate, the top light-shielding layer overlaps with a channel of the control transistor.

公开(公告)号：US11620945B2

公开(公告)日：2023-04-04

申请号：US17359686

申请日：2021-06-28

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

发明人： Mengmeng Zhang ,  Xingyao Zhou ,  Yana Gao

IPC分类号： G09G3/3233 ,  G09G3/3291

摘要： Provided are a display panel, a driving method and a display device. The display panel includes a substrate, a sub-pixel disposed on one side of the substrate and a switch device. A first terminal of the switch device is electrically connected to a first terminal of a driving device, and a second terminal of the switch device is connected to a biased compensation voltage terminal. An image update period includes a data writing stage and a holding stage, and the holding stage includes a first stage and a second stage. The driving device generates a driving current according to a data voltage transmitted by the data writing device in the data writing stage; and the driving device provides the driving current to a light emitting element in the second stage. The switch device provides a biased compensation voltage to the first terminal of the driving device in the first stage.

公开(公告)号：US20220343853A1

公开(公告)日：2022-10-27

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 ,  H01L27/32

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：US11804161B1

公开(公告)日：2023-10-31

申请号：US18079635

申请日：2022-12-12

申请人： Wuhan Tianma Micro-Electronics Co., Ltd. ,  Wuhan Tianma MicroElectronics Co., Ltd. Shanghai Branch

发明人： Yana Gao ,  Xingyao Zhou ,  Gaojun Huang

IPC分类号： G09G3/20

CPC分类号： G09G3/20 ,  G09G2300/0408 ,  G09G2300/0413 ,  G09G2300/0426 ,  G09G2300/0439 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2320/0233

摘要： Display panel and display device are provided. The display panel includes a first light-transmitting group, a first non-display area, and a display area; and a plurality of pixel driving circuits and a plurality of drive signal lines. The first non-display area surrounds the first light-transmitting group, the display area surrounds the first non-display area, and the first light-transmitting group includes at least two first light-transmitting areas arranged along a first direction. The plurality of pixel driving circuits is in the display area, a pixel driving circuit of the plurality of pixel driving circuits includes a data writing module, and a drive signal line of the plurality of drive signal lines is electrically connected to a control terminal of the data writing module.