US 12,725,565 B2Granted

Display panel and display device

AssigneeShanghai Tianma Microelectronics Co., Ltd.

InventorsYuqi Hu, Jujian Fu

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Abstract

Provided are a display panel and a display device. The display panel includes a pixel circuit and a light-emitting element. The pixel circuit includes a drive module and a first initialization module. The drive module is configured to generate a drive current. The first initialization module is configured to supply a first initialization voltage to a first node. The first node is connected to the light-emitting element. A first control terminal of the first initialization module is configured to transmit the first initialization voltage to the first node in response to a first scan control signal. A display period of the display panel includes a first display stage and a second display stage. In the first display stage, a total effective-pulse duration of the first scan control signal is T1. In the second display stage, the total effective-pulse duration of the first scan control signal is T2. T1<T2.

Claims18

Dependent claims

A display panel, comprising at least one pixel circuit and at least one light-emitting element, wherein the at least one pixel circuit is configured to drive the at least one light-emitting element to emit light;

the at least one pixel circuit comprises a drive module and a first initialization module, the drive module comprises a drive transistor, the first initialization module comprises a first initialization transistor, the first initialization module is configured to supply a first initialization voltage to a first node, the first node is connected to a respective one of the at least one light-emitting element, the first initialization module comprises a first control terminal, and the first control terminal is configured to transmit the first initialization voltage to the first node in response to an effective pulse of a first scan control signal;
wherein a display period of the display panel comprises a first display stage and a second display stage, and a data signal of the at least one pixel circuit is refreshed during the first display stage;
wherein the first display stage comprises a first non-emitting stage and a first emitting stage in consecutive, a pulse of a light emission control signal is ineffective during the first non-emitting stage;
and within the first display stage, a first time interval is set from an end time of a last effective pulse of the first scan control signal to an end time of the first non-emitting stage;
wherein the second display stage comprises a second non-emitting stage and a second emitting stage in consecutive, the pulse of the light emission control signal is ineffective during the second non-emitting stage;
and within the second display stage, a second time interval is set from an end time of a last effective pulse of the first scan control signal to an end time of the second non-emitting stage;
and
wherein a duration of the first time interval is shorter than a duration of the second time interval.

5 more elements

A display device, wherein the display device comprises a display panel comprising at least one pixel circuit and at least one light-emitting element, and wherein the at least one pixel circuit is configured to drive the at least one light-emitting element to emit light:

wherein the at least one pixel circuit comprises a drive module and a first initialization module, the drive module comprises a drive transistor, the first initialization module comprises a first initialization transistor, the first initialization module is configured to supply a first initialization voltage to a first node, the first node is connected to a respective one of the at least one light-emitting element, the first initialization module comprises a first control terminal, and the first control terminal is configured to transmit the first initialization voltage to the first node in response to an effective pulse of a first scan control signal;
wherein a display period of the display panel comprises a first display stage and a second display stage, and a data signal of the at least one pixel circuit is refreshed during the first display stage;
wherein the first display stage comprises a first non-emitting stage and a first emitting stage in consecutive, a pulse of a light emission control signal is ineffective during the first non-emitting stage;
and within the first display stage, a first time interval is set from an end time of a last effective pulse of the first scan control signal to an end time of the first non-emitting stage;
wherein the second display stage comprises a second non-emitting stage and a second emitting stage in consecutive, the pulse of the light emission control signal is ineffective during the second non-emitting stage;
and within the second display stage, a second time interval is set from an end time of a last effective pulse of the first scan control signal to an end time of the second non-emitting stage;
and
wherein a duration of the first time interval is shorter than a duration of the second time interval.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/959,910Filed 26 Nov 2024 · continuation
Priority: CN 202211090325.47 Sep 2022
Published: US 2025/0087142 A113 Mar 2025
Granted: 1 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

G09G 3/32
Using electroluminescent panels: semiconductive, e.g. using light-emitting diodes [LED]
G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 3/3266
Organic, e.g. using organic light-emitting diodes [OLED]: details of drivers for scan electrodes
G09G 2300/0819
Several active elements per pixel in active matrix panels: used for counteracting undesired variations, e.g. feedback or autozeroing

Family

Application18/099,564Parent of this continuation · filed 20 Jan 2023
US 2025/0087142 A1Pre-grant publication · published 13 Mar 2025
US 12,170,052 B2Parent of this continuation
US 2023/0230535 A1Published application
US 12,725,565 B2This patent

From the US filing history. Foreign family members aren’t listed.