Display panel, driving method thereof and display apparatus

Patent metadata

Field	Value
Publication number	US-12444378-B2
Application number	US-202218290924-A
Country	US
Kind code	B2
Filing date	Sep 5, 2022
Priority date	May 26, 2022
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A display panel, a method for driving a display panel, and a display apparatus are provided. The display panel includes a first base substrate and a plurality of pixels on one side of the first base substrate. Each pixel includes: a plurality of pixel sub-electrodes independent from each other and configured to form an electric field with an included angle greater than 0 with respect to a direction perpendicular to the first base substrate under control of incompletely same driving signals; a common electrode on a side of the pixel electrode away from the first base substrate; and an electrophoretic liquid layer between the pixel electrode and the common electrode, including a plurality of charged particles therein.

First claim

What is claimed is:

1. A display panel, wherein the display panel comprises: a first base substrate and a plurality of pixels on one side of the first base substrate; each pixel comprises:
a pixel electrode comprising a plurality of pixel sub-electrodes independent from each other and configured to form an electric field with an angle greater than 0 with respect to a direction perpendicular to the first base substrate under control of driving signals;
a common electrode on a side of the pixel electrode away from the first base substrate; and
an electrophoretic liquid layer between the pixel electrode and the common electrode, wherein the electrophoretic liquid layer comprises a plurality of charged particles therein;
wherein the driving signals are provided to the plurality of pixel sub-electrodes; and any one driving signal of the driving signals provided to the plurality of pixel sub-electrodes is different from at least one other driving signal of the driving signals;
wherein the display panel further comprises a plurality of blocking electrode groups; each blocking electrode group is between two adjacent pixels, and is configured to form an electric field to block the plurality of charged particles in the pixel from moving to an adjacent pixel; the electric field formed by the blocking electrode group has a component in a direction parallel to a plane where the first base substrate is located; and
each blocking electrode group comprises: a plurality of strip-shaped blocking electrode portions respectively on both sides of the pixel electrode in an arrangement direction of the plurality of pixel sub-electrodes; the strip-shaped blocking electrode portions on each side of the pixel electrode are independent from each other in the arrangement direction of the plurality of strip-shaped electrodes.

2. The display panel of claim 1 , wherein the plurality of charged particles in each pixel only include a plurality of charged particles of a first color.

3. The display panel of claim 1 , wherein the display panel further comprises:
a reflective layer between the first base substrate and the electrophoretic liquid layer;
the reflective layer is between the first base substrate and the pixel electrode; and
the reflective layer is made of a metal material, and the display panel further comprises a first insulating layer between the reflective layer and the pixel electrode.

4. The display panel of claim 1 , wherein the display panel further comprises: a reflective layer between the first base substrate and the electrophoretic liquid layer;
the reflective layer is made of a metal material, and is in a same layer as the pixel electrode; and
an orthographic projection of the reflective layer on the first base substrate and an orthographic projection of the pixel electrode on the first base substrate do not overlap with each other.

5. The display panel of claim 1 , wherein each blocking electrode group comprises only the strip-shaped blocking electrode portions; and each strip-shaped blocking electrode portion further serves a touch electrode.

6. The display panel of claim 5 , wherein the display panel further comprises: a plurality of first touch signal lines and a plurality of second touch signal lines;
an extending direction of each first touch signal line is the same as that of each strip-shaped blocking electrode portion, and an extending direction of each second touch signal line is the same as the arrangement direction of the strip-shaped blocking electrode portions; and
for any side of the pixel electrode of each pixel, an outermost strip-shaped blocking electrode portion is electrically connected to a corresponding first touch signal line, and a strip-shaped blocking electrode portion closest to the pixel electrode is electrically connected to a corresponding second touch signal line.

7. The display panel of claim 1 , wherein each blocking electrode group comprises a first strip-shaped blocking electrode portion to an nth strip-shaped blocking electrode portion on each side of the pixel electrode in a direction from the strip-shaped blocking electrode portion to the pixel electrode, where n is an integer greater than or equal to 2; and
each blocking electrode group further comprises: n connection portions; the n connection portions comprise a first connection portion to an nth connection portion; an ith connection portion is connected to two ith strip-shaped blocking electrode portions; where i is an integer, and 1≤i≤n.

8. The display panel of claim 7 , wherein the two ith strip-shaped blocking electrode portions are connected to only one ith connection portion; and
the n connection portions are on a same side of the pixel electrode in the extending direction of each strip-shaped blocking electrode portion; or
the two ith strip-shaped blocking electrode portions are connected to only one ith connection portion; and
the n connection portions are on different sides of the pixel electrode in the extending direction of each strip-shaped blocking electrode portion.

9. The display panel of claim 8 , wherein the plurality of pixels comprises a plurality of pixel rows; in the blocking electrode groups corresponding to each pixel row, the connection portions on one side of the pixel electrode and farthest from the pixel electrode are connected as a single piece in the extending direction of the strip-shaped blocking electrode portion in the pixel row.

10. The display panel of claim 7 , wherein the two ith connection portions are connected to two ends of each ith strip-shaped blocking electrode portion, respectively, in an extending direction of the ith strip-shaped blocking electrode portion; and the two ith connection portions and the two ith strip-shaped blocking electrode portions are connected together to form an annular blocking electrode.

11. The display panel of claim 1 , wherein the plurality of charged particles comprises: charged particles of a first color and charged particles of a second color; and the strip-shaped blocking electrode portions on each side of the pixel electrode in the direction from the strip-shaped blocking electrode portion to the pixel electrode comprise: a first strip-shaped blocking electrode portion, a second strip-shaped blocking electrode portion between the first strip-shaped blocking electrode portion and the pixel electrode, and a third strip-shaped blocking electrode portion between the second strip-shaped blocking electrode portion and the pixel electrode, or
wherein the plurality of charged particles are charged particles of a first color; and the strip-shaped blocking electrode portions on each side of the pixel electrode in the direction from the strip-shaped blocking electrode portion to the pixel electrode comprise: a first strip-shaped blocking electrode portion, and a second strip-shaped blocking electrode portion between the first strip-shaped blocking electrode portion and the pixel electrode.

12. The display panel of claim 11 , wherein the first strip-shaped blocking electrode portions of the plurality of blocking electrode groups are connected as a single piece, and a pattern of an orthographic projection of the first blocking strip-shaped electrode portions connected as a single piece of the plurality of blocking electrode groups on the first base substrate is a grid pattern.

13. The display panel of claim 1 , wherein the display panel further comprises: a plurality of blocking structures on a side of the common electrode close to the first base substrate; an orthographic projection of each blocking structure on the first base substrate overlaps with an orthographic projection of a corresponding blocking

Assignees

• Boe Technology Group Co Ltd

Inventors

• Guo Yuzhen
• Zheng Haoliang
• Xuan Minghua
• Zhao Hebin
• Lu Meirong
• Zhang Chenyang
• Xiao Li
• Cui Xiaorong
• Zhao Jiao
• Li Shulei
• Liu Weixing
• Peng Jintao
• Zhang Chunfang
• Wang Xinxing
• Xu Zhiqiang
• Teng Wanpeng
• Guo Kai

Classifications

• G02F1/16761

  Side-by-side arrangement of working electrodes and counter-electrodes · CPC title

• G02F1/1685

  Operation of cells; Circuit arrangements affecting the entire cell · CPC title

• G02F1/167 Primary

  by electrophoresis · CPC title

• G02F1/1677

  Structural association of cells with optical devices, e.g. reflectors or illuminating devices · CPC title

• G02F1/16766

  for active matrices · CPC title