CN-115712219-B - Color film substrate and electrophoresis display device

CN115712219BCN 115712219 BCN115712219 BCN 115712219BCN-115712219-B

Abstract

The invention relates to the technical field of display, and discloses a color film substrate and an electrophoretic display device; the color film substrate comprises a first substrate, a light filtering layer, a first electrode and a light enhancement layer, wherein the light filtering layer is arranged on one side of the first substrate, the first electrode is arranged on one side of the light filtering layer, which is away from the first substrate, and the light enhancement layer is arranged on one side of the first electrode, which is away from the first substrate, and one side of the light enhancement layer, which is away from the first substrate, is provided with a concave part. The color film substrate has higher contrast.

Inventors

KANG ZHAO
HUANG HUA
LI SHULEI
GU XIN
YUAN GUANGCAI
ZHANG YICHI

Assignees

京东方科技集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20221125

Claims (7)

1. An electrophoretic display device, comprising: The color film substrate comprises a first substrate, a filter layer, a first electrode and a light enhancement layer; the light enhancement layer is arranged on one side of the first electrode, which is away from the first substrate, and one side of the light enhancement layer, which is away from the first substrate, is provided with a concave part; the array substrate is arranged on one side of the light enhancement layer of the color film substrate, which is away from the first substrate, and an accommodating space is arranged between the array substrate and the color film substrate; the sealing retaining wall structure is arranged between the array substrate and the color film substrate, and divides the accommodating space into a plurality of sub-pixel spaces; the electrophoresis liquid is arranged in the sub-pixel space; reflective particles arranged in the electrophoretic fluid; the array substrate includes: a second substrate base plate; The driving backboard is arranged on one side, close to the color film substrate, of the second substrate, and comprises a plurality of switch units; the second electrode is connected to the driving backboard and is arranged on one side of the driving backboard, which is away from the second substrate base plate; A second dielectric layer covering at least the second electrode; The second electrode is arranged in a ring shape, and the light absorption structure is arranged in a ring of the second electrode.
2. An electrophoretic display device as claimed in claim 1, wherein the refractive index of the electrophoretic fluid is greater than the refractive index of the light enhancement layer.
3. The electrophoretic display device according to claim 1, wherein a first groove is formed in the driving back plate, the second electrode is located in the first groove, a second groove opposite to the first groove is formed in a surface, facing away from the second substrate, of the second dielectric layer, and a distance between a surface, close to the second substrate, of the light absorption structure and the second substrate is greater than a distance between a surface, facing away from the second substrate, of the second electrode and the second substrate.
4. The electrophoretic display device of claim 1, wherein the light absorbing structure comprises: the support part is arranged on one side of the driving backboard, which is away from the second substrate base plate; The light absorption layer is arranged on one side of the supporting part, which is away from the second substrate, and the orthographic projection of the light absorption layer on the second substrate covers the orthographic projection of the supporting part on the second substrate and the orthographic projection of the second electrode on the second substrate.
5. The electrophoretic display device according to claim 1, wherein a distance between a sidewall of the recess and the first substrate increases with an increase in a distance from a center of the recess at a first face parallel to a face of the first substrate adjacent to the filter layer.
6. The electrophoretic display device according to claim 5, wherein the sidewall of the recess includes one or both of a curved surface and a sloped surface.
7. The electrophoretic display device according to claim 1, wherein the reflective particles have a particle size of 150 nm or more and 400 nm or less.

Description

Color film substrate and electrophoresis display device Technical Field The disclosure relates to the technical field of display, in particular to a color film substrate and an electrophoretic display device comprising the color film substrate. Background The phenomenon that charged particles dispersed in a liquid undergo electrophoresis due to an applied electric field, so-called electrophoresis phenomenon, is well known, and an electrophoresis display (Electrophoretic, E-Paper) device using electrophoresis has been developed, which combines the advantages of plain Paper and an electronic display device, and has advantages of both readability and portability, as well as low power consumption, eye protection, good sun readability, low production cost, etc., so that the electrophoresis display device has been confirmed to be capable of replacing a conventional Paper medium. But currently electrophoretic display devices have a low contrast ratio. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art. Disclosure of Invention The present disclosure aims to overcome the defect of low contrast in the prior art, and provide a color film substrate with high contrast and an electrophoretic display device including the color film substrate. According to one aspect of the present disclosure, there is provided a color film substrate including: a first substrate base plate; the filter layer is arranged on one side of the first substrate base plate; the first electrode is arranged on one side of the filter layer, which is away from the first substrate base plate; The light enhancement layer is arranged on one side of the first electrode, which is away from the first substrate, and a concave part is arranged on one surface of the light enhancement layer, which is away from the first substrate. In one exemplary embodiment of the present disclosure, a distance between a sidewall of the recess and the first substrate increases with an increase in a distance from a center of the recess at a first face parallel to a face of the first substrate adjacent to the filter layer. In an exemplary embodiment of the present disclosure, the sidewall of the recess includes one or both of a cambered surface and a beveled surface. According to another aspect of the present disclosure, there is provided an electrophoretic display device, including: the color film substrate is any one of the color film substrates; the array substrate is arranged on one side of the light enhancement layer of the color film substrate, which is away from the first substrate, and an accommodating space is arranged between the array substrate and the color film substrate; the sealing retaining wall structure is arranged between the array substrate and the color film substrate, and divides the accommodating space into a plurality of sub-pixel spaces; the electrophoresis liquid is arranged in the sub-pixel space; and reflective particles arranged in the electrophoretic fluid. In an exemplary embodiment of the present disclosure, the refractive index of the electrophoretic fluid is greater than the refractive index of the light enhancement layer. In an exemplary embodiment of the present disclosure, the array substrate includes: a second substrate base plate; The driving backboard is arranged on one side, close to the color film substrate, of the second substrate, and comprises a plurality of switch units; the second electrode is connected to the driving backboard and is arranged on one side of the driving backboard, which is away from the second substrate base plate; A second dielectric layer covering at least the second electrode; And the light absorption structure is arranged on one side of the driving backboard, which is away from the second substrate. In an exemplary embodiment of the present disclosure, the second electrode is provided in a ring shape, and the light absorbing structure is provided in the ring of the second electrode. In an exemplary embodiment of the disclosure, a first groove is formed in the driving backboard, the second electrode is located in the first groove, a second groove opposite to the first groove is formed in one face, away from the second substrate, of the second dielectric layer, and the distance between one face, close to the second substrate, of the light absorption structure and the second substrate is larger than the distance between one face, away from the second substrate, of the second electrode and the second substrate. In one exemplary embodiment of the present disclosure, the light absorbing structure includes: the support part is arranged on one side of the driving backboard, which is away from the second substrate base plate; The light absorption layer is arranged on one side of the supporting part, whi