Display panel and display device

Patent metadata

Field	Value
Publication number	US-12417737-B2
Application number	US-202418807404-A
Country	US
Kind code	B2
Filing date	Aug 16, 2024
Priority date	Aug 31, 2023
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

Provided is a display panel. The display panel includes a pixel circuit and a driver circuit. The pixel circuit includes a drive module and a preset module. The preset module is configured to provide a preset signal for the drive module. The driver circuit is configured to provide a control signal for the preset module. At least part of the time period during which the display panel operates includes a transition phase. The transition phase is between the end of a retention frame of the first data refresh area and the start of a data write frame of the second data refresh area. Alternatively, the transition phase is between the end of a data write frame of the second data refresh area and the start of a retention frame of the first data refresh area.

First claim

What is claimed is:

1. A display panel, comprising:
a pixel circuit and a driver circuit, wherein the pixel circuit comprises a drive module and a preset module, the preset module is configured to provide a preset signal to the drive module, and the driver circuit is configured to provide a control signal to the preset module; and
a first data refresh area and a second data refresh area, wherein a data refresh frequency of the first data refresh area is F1, a data refresh frequency of the second data refresh area is F2, and F1<F2;
wherein at least part of a time period during which the display panel operates comprises a transition phase;
the transition phase is between an end of a retention frame of the first data refresh area and a start of a data write frame of the second data refresh area; and during the transition phase, the preset signal changes from a first preset signal to a second preset signal, and the control signal controls the preset module to be turned off, or
the transition phase is between an end of a data write frame of the second data refresh area and a start of a retention frame of the first data refresh area; and during the transition phase, the preset signal changes from a second preset signal to a first preset signal, and the control signal controls the preset module to be turned off.

2. The display panel of claim 1 , wherein:
when the data write frame of the second data refresh area starts, the control signal controls the preset module to be turned on.

3. The display panel of claim 1 , wherein:
when the retention frame of the first data refresh area starts, the control signal controls the preset module to be turned on.

4. The display panel of claim 1 , wherein:
the pixel circuit comprises a data write module and a bias adjustment module;
the data write module is connected to a first end of the drive module and is configured to provide a data signal to the drive module; and
the bias adjustment module is connected to a second end of the drive module and is configured to provide a bias adjustment signal to the drive module;
wherein the preset module is any one of the data write module and the bias adjustment module.

5. The display panel of claim 4 , wherein:
the preset module is the bias adjustment module, and the preset signal is the bias adjustment signal;
the drive module of the first data refresh area receives the first preset signal during the retention frame of the first data refresh area, and the drive module of the second data refresh area receives the second preset signal during the data write frame of the second data refresh area; and
a voltage value of the first preset signal is not equal to a voltage value of the second preset signal.

6. The display panel of claim 4 , wherein:
the preset module is the data write module, and the preset signal is the data signal;
the drive module of the first data refresh area receives the first preset signal during the retention frame of the first data refresh area, and the drive module of the second data refresh area receives the second preset signal during the data write frame of the second data refresh area; and
the transition phase is between the end of the retention frame of the first data refresh area and the start of the data write frame of the second data refresh area.

7. The display panel of claim 1 , wherein
a duration of the transition phase is t1, a duration of the retention frame of the first data refresh area is tm, and a duration of the data write frame of the second data refresh area is ts, wherein t1, tm and ts satisfy at least one of: t1<tm, or t1<ts.

8. The display panel of claim 1 , wherein:
a duration of the transition phase is t1; and
in the data write frame of the second data refresh area, a time period during which the control signal controls the preset module to be turned on is tc1; wherein t1>tc1.

9. The display panel of claim 1 , wherein:
a duration of the transition phase is t1; and
in the retention frame of the first data refresh area, a time period during which the control signal controls the preset module to be turned on is tc2; wherein t1>tc2.

10. The display panel of claim 1 , wherein:
the first data refresh area and the second data refresh area are arranged in a first direction;
a time difference between time when control signals control the preset module to be turned on in retention frames of pixel circuits of two adjacent rows that extend in a second direction in the first data refresh area is Δt1, and the second direction intersects with the first direction; and
a time difference between time when a control signal controls the preset module to be turned on in a retention frame of a pixel circuit of a last row that extends in the second direction in the first data refresh area and is adjacent to the second data refresh area and time when a control signal controls the preset module to be turned on in a data write frame of a pixel circuit of a first row that extends in the second direction in the second data refresh area and is adjacent to the first data refresh area is Δt0;
wherein ΔT0>Δt1.

11. The display panel of claim 1 , wherein
the first data refresh area and the second data refresh area are arranged in a first direction;
a time difference between time when control signals control the preset module to be turned on in data write frames of pixel circuits of two adjacent rows that extend in the second direction in the second data refresh area is Δt2, and the second direction intersects with the first direction; and
a time difference between time when a control signal controls the preset module to be turned on in a retention frame of a pixel circuit of a last row that extends in the second direction in the first data refresh area and is adjacent to the second data refresh area and time when a control signal controls the preset module to be turned on in a data write frame of a pixel circuit of a first row that extends in the second direction in the second data refresh area and is adjacent to the first data refresh area is Δt0;
wherein Δ T0>Δt2.

12. A display device, comprising a display panel,
wherein the display panel comprises:
a pixel circuit and a driver circuit, wherein the pixel circuit comprises a drive module and a preset module, the preset module is configured to provide a preset signal to the drive module, and the driver circuit is configured to provide a control signal to the preset module; and
a first data refresh area and a second data refresh area, wherein a data refresh frequency of the first data refresh area is F1, a data refresh frequency of the second data refresh area is F2, and F1<F2;
wherein at least part of a time period during which the display panel operates comprises a transition phase;
the transition phase is between an end of a retention frame of the first data refresh area and a start of a data write frame of the second data refresh area; and during the transition phase, the preset signal changes from a first preset signal to a second preset signal, and the control signal controls the preset module to be turned off, or
the transition phase is between an end of a data write frame of the second data refresh area and a start of a retention frame of the first data refresh area; and during the transition phase, the preset signal changes from a second preset signal to a first preset signal, and the control signal controls the preset module to be turned off.

Assignees

• Xiamen Tianma Display Tech Co Ltd

Inventors

• Lai Qingjun

Classifications

• G09G2320/0233

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

• G09G3/3233

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

• G09G3/3225 Primary

  using an active matrix · CPC title

• G09G3/3208 Primary

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title