公开(公告)号：US20230111763A1

公开(公告)日：2023-04-13

申请号：US18045311

申请日：2022-10-10

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

发明人： Mengmeng Zhang ,  Yue Li

IPC分类号： G09G3/3233 ,  G09G3/3266

摘要： A display panel, a method for driving a display panel, and a display device are provided. A first scanning driving unit is electrically connected to first scanning control terminals of first and second pixel driving circuits. A working cycle of the pixel driving circuit includes a data writing phase. The data writing phase of the first pixel driving circuit is prior to the data writing phase of the second pixel driving circuit in a display duration of one frame of an image. When the first pixel driving circuit and the second pixel driving circuit receive a same data voltage, a potential VN11 of the first node in the first pixel driving circuit after the data writing phase of the first pixel driving circuit is greater than a potential VN12 of the first node in the second pixel driving circuit after the data writing phase of the second pixel driving circuit.

公开(公告)号：US20230065254A1

公开(公告)日：2023-03-02

申请号：US18047361

申请日：2022-10-18

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

发明人： Yue Li ,  Peng Zhang ,  Mengmeng Zhang ,  Gaojun Huang

IPC分类号： G09G3/3266 ,  G11C19/28

摘要： A display panel and a display device are provided. In an embodiment, the display panel has a display region and a non-display region and includes shift registers cascaded and arranged along a first direction. In an embodiment, the shift registers are located in the non-display region. In an embodiment, one of the shift registers includes a switch module and an output module. In an embodiment, the output module is coupled to an output terminal of the shift register and includes two output transistors, and the output transistors are located at a side of the switch module away from the display region. In this way, the probability of occurrence of abnormal phenomena, such as splash screen display, is reduced.

公开(公告)号：US20220328003A1

公开(公告)日：2022-10-13

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

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 × L

公开(公告)号：US20230387366A1

公开(公告)日：2023-11-30

申请号：US17821891

申请日：2022-08-24

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

发明人： Mengmeng Zhang ,  Yue Li ,  Jing Huang

IPC分类号： H01L33/62 ,  H01L27/15 ,  H01L33/38

CPC分类号： H01L33/62 ,  H01L27/156 ,  H01L33/382

摘要： A display panel and a display apparatus are provided. The display panel includes a substrate and an array layer at a side of the substrate. The array layer includes pixel circuits and at least one first via. The pixel circuit includes transistors. Each transistor includes an active layer. The active layer includes a channel. The transistor includes a driving transistor and a first switching transistor. In a direction perpendicular to the substrate, a distance between one of the at least one first via and the channel of the driving transistor closest to the first via is greater than a preset distance. A distance between an edge of the one of the at least one first via and an edge of the channel of the first switching transistor closest to the one of the at least one first via is smaller than the preset distance.

公开(公告)号：US11749193B2

公开(公告)日：2023-09-05

申请号：US17669648

申请日：2022-02-11

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

发明人： Zhi Liu ,  Yana Gao ,  Fei Wu ,  Yue Li ,  Xingyao Zhou ,  Xueqi Tian

IPC分类号： G09G3/3233

CPC分类号： G09G3/3233 ,  G09G2300/0842 ,  G09G2310/0286 ,  G09G2310/061 ,  G09G2320/0214 ,  G09G2320/0233

摘要： Provided a pixel circuit, a method for driving a pixel circuit, a display panel, and a display apparatus. The pixel circuit applied in a display panel includes a data writing module, a drive transistor, a leakage current alleviation module, a first power supply terminal, and a data signal terminal. The data writing module configured to write data signal of the data signal terminal to gate of the drive transistor in data writing stage; the leakage current alleviation module configured to transmit leakage current generated by the data writing module to first power supply terminal in leakage current alleviation stage; and the drive transistor configured to drive a light-emitting element to emit light in light emission stage. The leakage current alleviation stage located at least between the data writing stage and the light emission stage, enhancing the luminance accuracy of the light-emitting element and the display uniformity of the display panel.

公开(公告)号：US20240005842A1

公开(公告)日：2024-01-04

申请号：US17955577

申请日：2022-09-29

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： G09G3/32 ,  G11C19/28

CPC分类号： G09G3/32 ,  G11C19/28 ,  G09G2310/0286 ,  G09G2300/0426

摘要： A display panel includes: a plurality of light-emitting pixels arranged in an array, a first shift register unit and a second shift register unit, wherein the first shift register unit is connected to data writing transistors in an ith row and an (i+1)th row and configured to provide a first controlling signal for the two adjacent rows of pixel circuits, and the data writing transistor is turned on in response to the first controlling signal; the second shift register unit is connected to threshold compensating transistors in the ith row and an (i−1)th row, and configured to provide a second controlling signal for the two adjacent rows of pixel circuits, and the threshold compensating transistor is turned on in response to the second controlling signal; and wherein a first turn-on period of the data writing transistor is partially overlapped with a second turn-on period of the threshold compensating transistor.

公开(公告)号：US11741882B2

公开(公告)日：2023-08-29

申请号：US17565486

申请日：2021-12-30

申请人： Shanghai Tianma AM-OLED Co., Ltd. ,  WUHAN TIANMA MICROELECTRONICS CO., LTD. SHANGHAI BRANCH

发明人： Dongxu Xiang ,  Yue Li ,  Renyuan Zhu ,  Yana Gao ,  Zhonglan Cai

IPC分类号： G09G3/22 ,  G09G3/3233 ,  G09G3/3266 ,  H10K59/10

CPC分类号： G09G3/22 ,  G09G3/3233 ,  G09G3/3266 ,  H10K59/10 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2300/0866 ,  G09G2310/0262 ,  G09G2310/0264 ,  G09G2310/0286 ,  G09G2320/0626

摘要： Provided are an organic light-emitting display panel, a driving method and a driving device therefor. The driving method includes: setting brightness levels of the organic light-emitting display panel and maximum gray scale brightness levels, and maximum gray scale brightness levels include a first maximum gray scale brightness corresponding to a maximum brightness level of the organic light-emitting display panel, and an effective pulse duty cycle of a light-emitting control signal for driving the first maximum gray scale brightness is defined as a first effective pulse duty cycle; determining a target brightness level of the switched picture and a target maximum gray scale brightness corresponding to the target brightness level; adjusting the target effective pulse duty cycle of the light-emitting control signal for driving the switched picture.

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
×
L

公开(公告)号：US11521539B2

公开(公告)日：2022-12-06

申请号：US17394954

申请日：2021-08-05

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

发明人： Yue Li ,  Mengmeng Zhang

IPC分类号： G11C19/28 ,  G09G3/20 ,  G09G3/3266

摘要： A scanning drive circuit, a driving method, a display panel, and a display apparatus are provided. The scanning drive circuit includes 1st to nth shift registers cascaded sequentially. Each shift register includes a pull-down unit, a pull-up unit, and first and second output units. The first output unit is electrically connected to a second supply voltage terminal and a first clock signal output terminal, and configured to output a level to a first output terminal based on levels of a second node and a third node. The second output unit is electrically connected to a third supply voltage terminal and a second clock signal output terminal, and configured to output a level to a second output terminal based on the levels of the second node and a fourth node. The first and the second output terminals of each shift register output effective levels sequentially.

公开(公告)号：US11990084B2

公开(公告)日：2024-05-21

申请号：US17955577

申请日：2022-09-29

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： G09G3/32 ,  G11C19/28

CPC分类号： G09G3/32 ,  G11C19/28 ,  G09G2300/0426 ,  G09G2310/0286

摘要： A display panel includes: a plurality of light-emitting pixels arranged in an array, a first shift register unit and a second shift register unit, wherein the first shift register unit is connected to data writing transistors in an ith row and an (i+1)th row and configured to provide a first controlling signal for the two adjacent rows of pixel circuits, and the data writing transistor is turned on in response to the first controlling signal; the second shift register unit is connected to threshold compensating transistors in the ith row and an (i−1)th row, and configured to provide a second controlling signal for the two adjacent rows of pixel circuits, and the threshold compensating transistor is turned on in response to the second controlling signal; and wherein a first turn-on period of the data writing transistor is partially overlapped with a second turn-on period of the threshold compensating transistor.