Foldable display panel and foldable display apparatus

Patent metadata

Field	Value
Publication number	US-12014657-B2
Application number	US-202217842325-A
Country	US
Kind code	B2
Filing date	Jun 16, 2022
Priority date	Jun 15, 2020
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

Disclosed are a foldable display panel and a foldable display apparatus. The foldable display panel includes a first display area and a second display area which are connected in a foldable manner. When the foldable display panel is in a first state, the first display area is light-emitted and the second display area is not light-emitted; and when the foldable display panel is in a second state, both the first display area and the second display area are light-emitted. A density of a drive current of the second display area is set to be greater than a density of a drive current of the first display area when the first display area and the second display area are in the second state.

First claim

What is claimed is:

1. A foldable display panel, comprising:
a first display area and a second display area which are connected in a foldable manner, wherein
when the foldable display panel is in a first state, the first display area is light-emitted and the second display area is not light-emitted; and
when the foldable display panel is in a second state, both the first display area and the second display area are light-emitted, and in a light-emitting period, a density of a drive current of the second display area is greater than a density of a drive current of the first display area.

2. The foldable display panel according to claim 1 , wherein a duty ratio of the drive current in the first display area is less than a duty ratio of the drive current in the second display area.

3. The foldable display panel according to claim 1 , wherein the foldable display panel comprises a first light emitting device in the first display area and a second light emitting device in the second display area, and when the foldable display panel is in the second state, in a light-emitting period, a light-emitting time of the second light emitting device is shorter than a light-emitting time of the first light emitting device.

4. The foldable display panel according to claim 3 , wherein when the foldable display panel is in the second state, the density of the drive current of the first display area is determined based on an aging degree of the first light emitting device, and the density of the drive current of the first display area is negatively correlated with the aging degree of the first light emitting device.

5. The foldable display panel according to claim 3 , wherein when the foldable display panel is in the second state, the density of the drive current of the second display area is determined based on an aging degree of the second light emitting device, and the density of the drive current of the second display area is negatively correlated with the aging degree of the second light emitting device.

6. The foldable display panel according to claim 3 , wherein when the foldable display panel is in the second state, in a same light-emitting period, a ratio of the light-emitting time of the first light emitting device to the light-emitting time of the second light emitting device is equal to a ratio of an aging degree of the first light emitting device to an aging degree of the second light emitting device.

7. The foldable display panel according to claim 6 , wherein a ratio of an average usage time of the first light emitting device to an average usage time of the second light emitting device is equal to the ratio of the aging degree of the first light emitting device to the aging degree of the second light emitting device.

8. The foldable display panel according to claim 6 , wherein the ratio of the light-emitting time of the first light emitting device to the light-emitting time of the second light emitting device comprises a preset ratio.

9. The foldable display panel according to claim 6 , wherein the ratio of the light-emitting time of the first light emitting device to the light-emitting time of the second light emitting device is obtained through an adjustment based on the ratio of the aging degree of the first light emitting device to the aging degree of the second light emitting device.

10. The foldable display panel according to claim 6 , wherein the ratio of the light-emitting time of the first light emitting device to the light-emitting time of the second light emitting device is adjusted periodically.

11. The foldable display panel according to claim 1 , wherein the foldable display panel comprises a first drive circuit in the first display area, and the first drive circuit drives the first display area to be light-emitted; and the foldable display panel comprises a second drive circuit in the second display area, and the second drive circuit drives the second display area to be light-emitted.

12. The foldable display panel according to claim 1 , wherein the first state comprises a fully folded state, and the second state comprises a fully unfolded state.

13. The foldable display panel according to claim 1 , wherein the first state comprises a state of being folded at a preset angle, and/or the second state comprises a state of being folded at another preset angle.

14. The foldable display panel according to claim 1 , further comprising a folding area which connects the first display area and the second display area, wherein the foldable display panel is folded or unfolded in the folding area to implement a switching between the first state and the second state.

15. The foldable display panel according to claim 14 , wherein when the foldable display panel is in the first state, the folding area is light-emitted; and when the foldable display panel is in the second state, a density of a drive current of the folding area is equal to the density of the drive current of the first display area.

16. The foldable display panel according to claim 14 , wherein when the foldable display panel is in the first state, the folding area is not light-emitted; and when the foldable display panel is in the second state, a density of a drive current of the folding area is equal to the density of the drive current of the second display area.

17. A foldable display apparatus, comprising the foldable display panel according to claim 1 .

Assignees

• Hefei Visionox Tech Co Ltd

Inventors

• Feng Hongqing
• Li Hongrui
• Zhao Lijun
• Zhang Bing
• Gai Cuili
• Ding Liwei

Classifications

• G06F1/1652

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• G06F1/1641

  the display being formed by a plurality of foldable display components (G06F1/1647 takes precedence) · CPC title

• G06F1/1616 Primary

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title

• G09F9/301 Primary

  flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED · CPC title

• G09G3/30

  using electroluminescent panels · CPC title