Color film substrate, display panel, and display device

Patent metadata

Field	Value
Publication number	US-2025081799-A1
Application number	US-202218279307-A
Country	US
Kind code	A1
Filing date	Nov 11, 2022
Priority date	Nov 11, 2022
Publication date	Mar 6, 2025
Grant date	—

Abstract

A color film substrate, including: a first base substrate, a plurality of control electrodes, a fixed signal terminal, a color film layer, a drive circuit, and a first light-shielding layer. The color film layer includes a plurality of first color films, a plurality of second color films, and a plurality of color-changing color films. An orthographic projection of each of the first color films on the first base substrate is within one of first pixel regions. The first color film is in a first color. An orthographic projection of each of the second color films on the first base substrate is within one of second pixel regions. The second color film is in a second color. Each of the color-changing color films is configured to regulate a color based on the second color and a third color under control of the fixed signal terminal and the drive circuit.

First claim

1 . A color film substrate, comprising:
a first base substrate, comprising a plurality of first pixel regions, a plurality of second pixel regions, a plurality of third pixel regions, and a light-shielding region; a plurality of control electrodes disposed on the first base substrate, wherein each of the control electrodes is within one of the third pixel regions; a fixed signal terminal, connected to the plurality of control electrodes; a color film layer disposed on the first base substrate, comprising at least a plurality of first color films, a plurality of second color films, and a plurality of color-changing color films, wherein an orthographic projection of each of the first color films on the first base substrate is within one of the first pixel regions, the first color film is in a first color, an orthographic projection of each of the second color films-on the first base substrate is within one of the second pixel regions, the second color film is in a second color, and an orthographic projection of each of the color-changing color films-on the first base substrate is within one of the third pixel regions; a drive circuit, connected to the plurality of color-changing color films, wherein each of the color-changing color films is configured to regulate a color based on the second color and a third color under control of the fixed signal terminal and the drive circuit; and a first light-shielding layer, disposed on the first base substrate, wherein an orthographic projection of the first light-shielding layer on the first base substrate is within the light-shielding region.

2 . The color film substrate according to claim 1 , wherein the first base substrate-further comprises a plurality of fourth pixel regions, and the color film layer further comprises a plurality of third color films, wherein an orthographic projection of each of the third color films on the first base substrate is within one of the fourth pixel regions, and the third color film is in the third color.

3 . The color film substrate according to claim 2 , wherein a ratio of an area of the color-changing color film to a sum of areas of the color-changing color film and the third color film is positively correlated to a ratio of a peak energy of light of the third color to a peak energy of light of the second color in light emitted by the light-emitting unit in the array substrate of the display panel.

4 . The color film substrate according to claim 1 , wherein
the first base substrate comprises a plurality of buffer empty pool region in one-to-one correspondence with the plurality of third pixel regions, and a communication hole is disposed in the first light-shielding layer between each of the buffer empty pool regions and a corresponding one of the third pixel regions; and the color-changing color film is acquired by curing a color-changing fluidic material, wherein prior to the curing, the color-changing fluidic material filled into each of the third pixel regions enters a corresponding one of the buffer empty pool regions through the communication hole; and upon the curing, the color-changing color film is within the third pixel region and the buffer empty pool region that are communicated.

5 . The color film substrate according to claim 4 , wherein
each n buffer empty pool regions corresponding to each n third pixel regions of the plurality of third pixel regions are within a target region, each of the target regions being between two of the n third pixel regions; and a ratio of a sum of areas S2 of the n buffer empty pool regions to an area S1 of one of the third pixel regions satisfies:

S
⁢
2
/
S
⁢
1

≥

n
⁢

(

H
⁢
1
/
H
⁢
2

-
1

)

;

wherein H1 represents a thickness of the color-changing fluid material in a case that the color-changing fluid material is filled only into the third pixel region, and H2 represents a thickness of the color-changing fluid material in a case that the color-changing fluid material is filled into both the third pixel region and the buffer empty pool region.

6 . The color film substrate according to claim 5 , wherein n is equal to 2, the target region is between two third pixel regions, each of the buffer empty pool regions is semicircular, straight edges of the two buffer empty pool regions within one of the target regions are opposite to each other, and the first light-shielding layer is disposed between the straight edges of two of the buffer empty pool regions.

7 . The color film substrate according to claim 5 , wherein n is equal to 6, six third pixel regions are arranged in three rows and two columns, the target region is between two of the third pixel regions in a second row, each of the buffer empty pool regions is equilateral triangle-shaped, vertex angles of the six buffer empty pool regions within one of the target regions are opposite to each other, and the first light-shielding layer is disposed between any two of the six buffer empty pool regions.

8 . The color film substrate according to claim 1 , wherein the color-changing color film is acquired by curing an electrochemical gel solution; and
the color film substrate further comprises: a plurality of first signal lines, wherein one end of each of the first signal lines is connected to one of the color-changing color films and the other end is connected to the drive circuit, the drive circuit supplies a first signal to the color-changing color film by the first signal line, and the first signals supplied by the drive circuit to different color-changing color films have different potentials; and a plurality of second signal lines, wherein one end of each of the second signal lines is connected to one of the control electrodes and the other end is connected to the fixed signal terminal, the fixed signal terminal supplies a second signal to the control electrode by the second signal line, and the second signals supplied by the fixed signal terminal to different control electrode have an equal potential; wherein the color-changing color film is configured to regulate the color based on the second color and the third color under control of an electric field formed by a voltage difference between the first signal and the second signal.

9 . The color film substrate according to claim 1 , wherein the color-changing color film is acquired by curing a temperature gel solution; and
the color film substrate further comprises: a plurality of first signal lines, wherein one end of each of the first signal lines is connected to one of the color-changing color films and the other end is connected to the drive circuit, the drive circuit supplies a first signal to the color-changing color film by the first signal line, and the first signals supplied by the drive circuit to different color-changing color films have different potentials; and a plurality of second signal lines, wherein one end of each of the second signal lines is connected to one of the

Assignees

• Boe Technology Group Co Ltd

Inventors

• Huang Wei
• Jin Qian
• Bai Jinglu

Classifications

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title

• H10K59/50 Primary

  OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements · CPC title

• G02F1/157

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

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F1/1335

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