公开(公告)号：US20230351940A1

公开(公告)日：2023-11-02

申请号：US18344897

申请日：2023-06-30

Applicant: Xiamen Tianma Micro-Electronics Co., Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Yong YUAN

IPC: G09G3/20

CPC classification number: G09G3/2092 ,  G09G2310/0286 ,  G09G2310/08 ,  G11C19/28

Abstract: Provided are a display panel and a display device. The display panel includes a driver circuit including N stages of cascaded shift registers, where N≥2. A shift register includes a first control part and a second control part. The second control part includes a first control unit and a second control unit. The first control unit comprises a first gating unit. One terminal of the first gating unit is connected to a preset node, another terminal of the first gating unit is connected to a fourth node, and a control terminal of the first gating unit is configured to receive a fifth voltage signal. The second control unit is configured to receive at least a third voltage signal and a signal of the fourth node or receive at least a fourth voltage signal and a signal of a fifth node and generate an output signal.

公开(公告)号：US20230290289A1

公开(公告)日：2023-09-14

申请号：US18198112

申请日：2023-05-16

Applicant: Xiamen Tianma Micro-Electronics Co.,Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Yong YUAN ,  Ping AN ,  Zhaokeng CAO

IPC: G09G3/20 ,  G11C19/28

CPC classification number: G09G3/20 ,  G11C19/28 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/0286

Abstract: A display panel includes a driving circuit. The driving circuit includes N levels of shift registers cascaded with each other, N≥2. A shift register of the N levels of the shift registers includes a third control unit and a fourth control unit. The third control unit is configured to receive the first voltage signal and a second voltage signal and control a signal of a fourth node in response to the signal of the second node and a signal of a third node. The first voltage signal is a high-level signal and the second voltage signal is a low-level signal. The fourth control unit is configured to receive a third voltage signal and a fourth voltage signal and generate an output signal in response to the signal of the first node and the signal of the fourth node and includes a first transistor and a second transistor.

公开(公告)号：US20220327980A1

公开(公告)日：2022-10-13

申请号：US17855139

申请日：2022-06-30

Applicant: Xiamen Tianma Micro-Electronics Co., Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU

IPC: G09G3/20

Abstract: A display panel and a display device are provided. The display panel includes a driving circuit and the driving circuit includes N-level shift registers cascaded with each other, where N is greater than or equal to two. A shift register of the N-level shift registers includes: a third control unit, configured to control a signal of a fourth node, the third control unit receives a first voltage signal and a second voltage signal, the first voltage signal is a high-level signal, and the second voltage signal is a low-level signal; and a fourth control unit, configured to generate an output signal, the fourth control unit receives a third voltage signal and a fourth voltage signal. The display panel further includes a pixel circuit, the pixel circuit includes a driving transistor, the driving circuit provides a first driving signal.

公开(公告)号：US20220215791A1

公开(公告)日：2022-07-07

申请号：US17212323

申请日：2021-03-25

Applicant: Xiamen Tianma Micro-Electronics Co.,Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Shaorong YU

IPC: G09G3/20

Abstract: The present disclosure provides a shift register and a driving method thereof, a scan driving circuit, a display panel, and a display device. The shift register includes an input module; a control module; a reset module; a first output module; a second output module; and a stabilization module, that a phase of a signal output from the second output module lags behind a phase of a signal output from the first output module, and does not overlap with the phase of the signal output from the first output module.

公开(公告)号：US20220208051A1

公开(公告)日：2022-06-30

申请号：US17451126

申请日：2021-10-15

Applicant: Xiamen Tianma Micro-Electronics Co.,Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Ping AN

IPC: G09G3/20 ,  G11C19/28

Abstract: A display panel and a display device are provided. The display panel includes a driving circuit. The driving circuit includes N-level shift registers cascaded with each other, where N is greater than or equal to two. A shift register includes: a first control unit configured to receive an input signal and control a signal of a first node; a second control unit configured to receive a first voltage signal and control a signal of a second node; a third control unit configured to receive the first voltage signal and generate an output signal, or receive a second voltage signal and generate an output signal in response to a signal of a third node connected to the first node; and a fourth control unit configured to receive the second voltage signal and control the signal of the first node. The first and second voltage signals are high-level and low-level signals, respectively.

公开(公告)号：US20240063226A1

公开(公告)日：2024-02-22

申请号：US18384593

申请日：2023-10-27

Applicant: Xiamen Tianma Micro-Electronics Co., Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Yong YUAN ,  Ping AN ,  Zhaokeng CAO

IPC: H01L27/12 ,  G11C19/28

CPC classification number: H01L27/1225 ,  G11C19/28 ,  G09G2310/0286

Abstract: A display panel includes at least one driving circuit and at least one pixel circuit. A driving circuit of the at least one driving circuit provides a driving signal for a pixel circuit of the at least one pixel circuit. The driving circuit includes N-level shift registers cascaded with each other. N is greater than or equal to two. The pixel circuit provides a display signal for a display unit of the display panel. A shift register of the N-level shift registers includes at least one first transistor. The at least one first transistor includes at least one first active layer, and an active layer with a largest area among the at least one first active layer is a first preset active layer. The pixel circuit includes at least one second transistor. The at least one second transistor includes at least one second active layer.

公开(公告)号：US20240055437A1

公开(公告)日：2024-02-15

申请号：US18384565

申请日：2023-10-27

Applicant: Xiamen Tianma Micro-Electronics Co., Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Yong YUAN ,  Ping AN ,  Zhaokeng CAO

IPC: H01L27/12 ,  G09G3/3225

CPC classification number: H01L27/1237 ,  H01L27/1251 ,  G09G3/3225 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2300/0465 ,  G09G2300/0814 ,  H01L27/1225 ,  H10K59/1213

Abstract: A display panel includes a base substrate, a first transistor, and a second transistor. The first transistor and the second transistor are formed on the base substrate. The first transistor includes a first active layer, a first gate electrode, a first source electrode, and a first drain electrode. The first active layer includes silicon. The second transistor includes a second active layer, a second gate electrode, a second source electrode, and a second drain electrode. The second active layer includes oxide semiconductor. A length of a channel region of the first transistor is L1. Along a direction perpendicular to the base substrate, a distance between the first gate electrode and the first active layer is D1. A length of a channel region of the second transistor is L2. Along the direction perpendicular to the base substrate, a distance between the second gate electrode and the second active layer is D2.

公开(公告)号：US20230282145A1

公开(公告)日：2023-09-07

申请号：US18198013

申请日：2023-05-16

Applicant: Xiamen Tianma Micro-Electronics Co.,Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Yong YUAN ,  Ping AN ,  Zhaokeng CAO

IPC: G09G3/20 ,  G11C19/28

CPC classification number: G09G3/20 ,  G11C19/28 ,  G09G2300/0842 ,  G09G2300/0819 ,  G09G2310/061 ,  G09G2310/0286

Abstract: A display panel includes a pixel circuit and a driving circuit. The pixel circuit includes a driving transistor. The driving circuit is configured to provide a signal for the pixel circuit, receive a third voltage signal and a fourth voltage signal, and generate an output signal. The third voltage signal is a high-level signal, and the fourth voltage signal is a low-level signal. A working process of the pixel circuit includes a reset phase and a bias phase. The output signal of the driving circuit is a reset signal in the reset phase. The output signal of the driving circuit is a bias signal in the bias phase. In response to the driving transistor being a PMOS transistor, the reset signal is the fourth voltage signal, and the bias signal is the third voltage signal.

公开(公告)号：US20230215369A1

公开(公告)日：2023-07-06

申请号：US18182216

申请日：2023-03-10

Applicant: Xiamen Tianma Micro-Electronics Co., Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Jinjin YANG ,  Ping AN

IPC: G09G3/3233 ,  G09G3/3266

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G2310/061 ,  G09G2320/0233 ,  G09G2330/021

Abstract: Disclosed are a display panel and a display device. The display panel includes a pixel circuit. In the pixel circuit, a reset device includes a first sub-transistor and a second sub-transistor, and a connection node between the first sub-transistor and the second sub-transistor is a second node; a compensation device includes a third sub-transistor and a fourth sub-transistor, a connection node between the third sub-transistor and the fourth sub-transistor is a third node; the pixel circuit includes a second capacitor and a third capacitor; two pole plates of the second capacitor are respectively connected to a line of first scan signal and the second node; two pole plates of the third capacitor are respectively connected to a line of second scan signal and the third node; and the second capacitor (C2) and the third capacitor (C3) satisfy: C2≤C3.

公开(公告)号：US20230196992A1

公开(公告)日：2023-06-22

申请号：US18108373

申请日：2023-02-10

Applicant: Xiamen Tianma Micro-Electronics Co., Ltd.

Inventor： Qingjun LAI ,  Yihua ZHU ,  Ping AN

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/043 ,  G09G2300/0819 ,  G09G2320/0233 ,  G09G2320/045

Abstract: Provided are a display panel, a driving method thereof and a display device. The display panel includes: a pixel circuit and a light-emitting element, where the pixel circuit includes a light emitting control module, a drive module and a compensation module; the light emitting control module includes a first light emitting control module configured to selectively provide a first power supply signal for the drive module; the drive module is configured to provide a drive current for the light-emitting element and comprises a drive transistor; the compensation module is configured to compensate a threshold voltage of the drive transistor; and a working process of the pixel circuit includes a light emitting stage and a bias stage.