Pixel circuit and driving method therefor, and display panel

Patent metadata

Field	Value
Publication number	US-2026073854-A1
Application number	US-202519394807-A
Country	US
Kind code	A1
Filing date	Nov 19, 2025
Priority date	May 31, 2023
Publication date	Mar 12, 2026
Grant date	—

Abstract

A pixel circuit and a driving method therefor, and a display panel are provided. The pixel circuit includes a driver module, a signal supply terminal, a compensation module, and a coupling module. The compensation module is configured to compensate for a threshold voltage of the driver module in a compensation phase. The signal supply terminal supplies a fixed voltage to the coupling module in an initialization phase and supplies a data voltage to the coupling module in a data writing phase, the coupling module is configured to couple a voltage containing information about the data voltage to a control terminal of the driver module via the compensation module in the data writing phase, where the data writing phase is later than the compensation phase.

First claim

1 . A pixel circuit, comprising: a driver module, a signal supply terminal, a compensation module, and a coupling module, wherein
the compensation module is configured to compensate for a threshold voltage of the driver module in a compensation phase; and the signal supply terminal supplies a fixed voltage to the coupling module in an initialization phase and supplies a data voltage to the coupling module in a data writing phase, and the coupling module is configured to couple a voltage containing information about the data voltage to a control terminal of the driver module via the compensation module in the data writing phase, wherein the data writing phase is later than the compensation phase.

2 . The pixel circuit according to claim 1 , wherein a start time of the data writing phase is later than an end time of the compensation phase.

3 . The pixel circuit according to claim 1 , further comprising a second initialization module, wherein the second initialization module is configured to control, in the compensation phase, a first terminal of the driver module to discharge via the driver module and the second initialization module, and the compensation module is configured to compensate for the threshold voltage of the driver module in the compensation phase based on a voltage present after the first terminal of the driver module discharges.

4 . The pixel circuit according to claim 3 , further comprising a first light-emission control module and a second light-emission control module, wherein the first light-emission control module is configured to transmit a first supply voltage to the first terminal of the driver module in the initialization phase and a light-emission phase; and
the second light-emission control module is configured to transmit a voltage of the first terminal of the driver module to the second initialization module in the compensation phase for discharging; and the second light-emission control module is further configured to transmit a drive current generated by the driver module to a light-emitting module in the light-emission phase.

5 . The pixel circuit according to claim 3 , further comprising a light-emitting module, wherein
the second initialization module is further configured to transmit an initialization voltage to the light-emitting module at least in the initialization phase; the pixel circuit further comprises a storage module configured to store a voltage difference between the control terminal of the driver module and a first terminal of the light-emitting module.

6 . The pixel circuit according to claim 1 , wherein
the compensation module is connected between a control terminal and a first terminal of the driver module; and the coupling module is connected between the first terminal of the driver module and the signal supply terminal.

7 . The pixel circuit according to claim 4 , further comprising a light-emitting module, wherein
the first light-emission control module is connected between a first supply voltage terminal and the first terminal of the driver module, the second light-emission control module is connected between a second terminal of the driver module and a first terminal of the light-emitting module, and a second terminal of the light-emitting module is connected to a second supply voltage terminal; and a control terminal of the first light-emission control module is connected to a first light-emission control signal line, and a control terminal of the second light-emission control module is connected to a second light-emission control signal line.

8 . The pixel circuit according to claim 3 , further comprising a second initialization module connected between an initialization signal line and the first terminal of the light-emitting module, with a control terminal of the second initialization module connected to a third scan line, wherein
a control terminal of the compensation module is connected to a first scan line; a control terminal of the compensation module is connected to the third scan line; the pixel circuit further comprises a storage module connected between the control terminal of the driver module and the first terminal of the light-emitting module.

9 . The pixel circuit according to claim 8 , wherein the driver module comprises a first transistor, the first light-emission control module comprises a fourth transistor, the second light-emission control module comprises a fifth transistor, and the light-emitting module comprises a light-emitting diode, wherein
a gate of the fourth transistor is connected to the first light-emission control signal line, a first electrode of the fourth transistor is connected to the first supply voltage terminal, a second electrode of the fourth transistor is connected to a first electrode of the first transistor, a second electrode of the first transistor is connected to a first electrode of the fifth transistor, a second electrode of the fifth transistor is connected to a first electrode of the light-emitting diode, a second electrode of the light-emitting diode is connected to the second supply voltage terminal, and a gate of the fifth transistor is connected to the second light-emission control signal line; and the coupling module comprises a first capacitor, the compensation module comprises a sixth transistor, and the second initialization module comprises a seventh transistor; and a first electrode of the first capacitor is connected to the signal supply terminal, a second electrode of the first capacitor is connected to a first electrode of the first transistor, a first electrode of the sixth transistor is connected to the first electrode of the first transistor, a second electrode of the sixth transistor is connected to a gate of the first transistor, a gate of the sixth transistor is connected to the first scan line, a first electrode of the seventh transistor is connected to the initialization signal line, a second electrode of the seventh transistor is connected to a first electrode of the light-emitting diode, and a gate of the seventh transistor is connected to the third scan line; and the storage module comprises a second capacitor, a first electrode of the second capacitor is connected to the control terminal of the driver module, and a second electrode of the second capacitor is connected to the first terminal of the light-emitting module.

10 . A pixel circuit, comprising: a driver module, a data writing module, a first initialization module, a compensation module, and a coupling module, wherein
the compensation module is connected between a control terminal and a first terminal of the driver module, and the compensation module is configured to compensate for a threshold voltage of the driver module; the data writing module and the first initialization module are connected at a first node; and the coupling module is connected between the first terminal of the driver module and the first node, the first initialization module is configured to transmit a fixed voltage to the coupling module, and the coupling module is configured to couple, to the control terminal of the driver module via the compensation module, a voltage transmitted by the data writing module and containing information about a data voltage.

11 . The pixel circuit according to claim 10 , wherein the data writing module comprises a second transistor, a gate of the second transistor is connected to a first scan line, a first electrode of the second transistor is connected to a data line, and a second electrode of the second transistor is connected to the first node; and
the first initialization module comprises a third transistor, a gate of the third transistor is connected to a second scan line, a first electrode o

Assignees

• Yungu Gu’An Tech Co Ltd

Inventors

• Guo Enqing
• Gai Cuili
• Li Junfeng
• Pan Kangguan
• Guo Shuang
• Jin Xiaoyang

Classifications

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G2300/0819

  used for counteracting undesired variations, e.g. feedback or autozeroing · CPC title

• G09G2320/0257

  Reduction of after-image effects · CPC title

• G09G2300/0842

  forming a memory circuit, e.g. a dynamic memory with one capacitor · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title