CN-116682331-B - Color film substrate, manufacturing method thereof, display panel and display device

CN116682331BCN 116682331 BCN116682331 BCN 116682331BCN-116682331-B

Abstract

The application provides a color film substrate, a manufacturing method thereof, a display panel and a display device, wherein the color film substrate comprises a first substrate, black matrixes are arranged at intervals on one side of the first substrate, a first light-transmitting layer for covering the black matrixes is arranged on one side, far away from the first substrate, of each black matrix, color blocks are arranged between the first light-transmitting layers corresponding to two adjacent black matrixes, a second light-transmitting layer is arranged on one side, far away from the first substrate, of each color block, and the refractive index of the second light-transmitting layer is larger than that of the first light-transmitting layer. The color film substrate, the manufacturing method thereof, the display panel and the display device provided by the application have the advantages of simple structure, convenience in manufacturing and low cost, can effectively improve the light emitting efficiency of the device, improve the display effect, have long service life and improve the overall performance of the product.

Inventors

SUN MENGNA
LIU WENQI
HUANG QINGYU
ZHANG JUAN
WANG PENG
KANG LIANGLIANG
JIAO ZHIQIANG

Assignees

京东方科技集团股份有限公司
北京京东方技术开发有限公司

Dates

Publication Date: 20260505
Application Date: 20230620

Claims (11)

1. A color film substrate is characterized by comprising a first substrate, black matrixes are arranged on one side of the first substrate at intervals, a first light-transmitting layer for covering the black matrixes is arranged on one side, away from the first substrate, of each black matrix, color blocking blocks are arranged between the first light-transmitting layers corresponding to two adjacent black matrixes, a second light-transmitting layer is arranged on one side, away from the first substrate, of each color blocking block, the refractive index of each second light-transmitting layer is larger than that of each first light-transmitting layer, color blocking blocks with different colors are respectively arranged on two sides of each black matrix, the included angle between one side, close to one color blocking block, of each first light-transmitting layer and the first substrate is a first included angle, the included angle between one side, close to the other color blocking block, of each first light-transmitting layer and the first substrate is a second included angle, and the first included angle and the second included angle are different.
2. The color filter substrate according to claim 1, wherein an included angle between a side of the first light-transmitting layer, which is close to the color block, and the first substrate is greater than or equal to 35 °.
3. The color filter substrate according to claim 2, wherein an included angle between a side of the first light-transmitting layer, which is close to the color block, and the first substrate is inversely related to the brightness of the color block.
4. The color film substrate according to claim 1, wherein a cross-sectional shape formed by the combination of the black matrix and the first light-transmitting layer is a trapezoid or a triangle.
5. The color filter substrate according to claim 4, wherein the ratio of the width to the thickness of the cross section is 2:1 to 3:1.
6. The color film substrate according to claim 1, wherein the total thickness of the first light-transmitting layer and the black matrix is less than or equal to 10 μm, the thickness of the second light-transmitting layer is 2 μm to 200 μm, the difference between the refractive index of the second light-transmitting layer and the refractive index of the first light-transmitting layer is 0.1 to 0.6, and the thickness ratio of the black matrix to the first light-transmitting layer is 7:3 to 9:1.
7. The color film substrate according to claim 1, wherein a quantum dot color conversion layer is arranged between the color block and the second light-transmitting layer, a buffer layer is arranged on one side, away from the first substrate, of the second light-transmitting layer, and a filling layer is arranged on one side, away from the first substrate, of the buffer layer.
8. The color filter substrate according to claim 7, wherein a side of the buffer layer away from the first substrate is in a same plane as an end of the first light-transmitting layer away from the first substrate, and a refractive index of the buffer layer is greater than a refractive index of the first light-transmitting layer and less than a refractive index of the second light-transmitting layer.
9. The display panel is characterized by comprising an array substrate and the color film substrates, wherein the array substrate and the color film substrates are oppositely arranged, the first substrate in the color film substrates is far away from the array substrate, the array substrate comprises a second substrate, pixel defining structures are arranged at intervals on one side of the second substrate, the pixel defining structures are arranged in one-to-one correspondence with the black matrixes, a light emitting layer is arranged between every two adjacent pixel defining structures, and a packaging layer is arranged on one side of the light emitting layer far away from the second substrate.
10. A display device comprising the display panel of claim 9.
11. A manufacturing method for the color film substrate applied to any one of claims 1-8 is characterized by comprising the steps of forming black matrixes at intervals on one side of a first substrate through a first patterning process, forming a first light-transmitting layer covering the black matrixes on one side of each black matrix far away from the first substrate through a second patterning process, forming color blocking blocks between the first light-transmitting layers corresponding to two adjacent black matrixes through a third patterning process, and forming a second light-transmitting layer on one side of the color blocking blocks far away from the first substrate through a fourth patterning process.

Description

Color film substrate, manufacturing method thereof, display panel and display device Technical Field The application relates to the technical field of display, in particular to a color film substrate, a manufacturing method thereof, a display panel and a display device. Background The MLED includes Mini-LED display technology and Micro-LED display technology (Mini/microLightEmittingDiode, micro light emitting diode, collectively referred to as MLED), and currently, implementation of full-color display of the MLED mainly includes BMLED (blue light Micro light emitting diode) and QD (quantum dot color conversion layer) technology, and blue light is used as backlight, and blue light with high energy is used to excite red or green quantum dots to generate corresponding red light or green light, so as to implement color conversion, and the MLED has high quality characteristics of pure color, wider color gamut, wide viewing angle, ultra-high contrast ratio and fast response speed, but the color film substrate of the existing device has low light emitting efficiency, so that a color film substrate capable of effectively improving light emitting efficiency is needed. Disclosure of Invention Accordingly, the present application is directed to a color film substrate, a manufacturing method thereof, a display panel and a display device. According to a first aspect of the application, a color film substrate is provided, the color film substrate comprises a first substrate, black matrixes are arranged at intervals on one side of the first substrate, a first light-transmitting layer covering the black matrixes is arranged on one side of each black matrix far away from the first substrate, color blocks are arranged between the first light-transmitting layers corresponding to two adjacent black matrixes, a second light-transmitting layer is arranged on one side of each color block far away from the first substrate, and the refractive index of the second light-transmitting layer is larger than that of the first light-transmitting layer. In some embodiments, an included angle between a side of the first light-transmitting layer, which is close to the color block, and the first substrate is greater than or equal to 35 °. In some embodiments, two sides of the black matrix are respectively provided with color blocks of different colors, an included angle between one side of the first light-transmitting layer, which is close to one of the color blocks, and the first substrate is a first included angle, an included angle between one side of the first light-transmitting layer, which is close to the other one of the color blocks, and the first substrate is a second included angle, and the first included angle and the second included angle are different. In some embodiments, an included angle between a side of the first light-transmitting layer, which is close to the color block, and the first substrate is inversely related to the brightness of the color block. In some embodiments, the black matrix and the first light-transmitting layer are combined to form a trapezoid or triangle in cross-sectional shape. In some embodiments, the cross-section has a width to thickness ratio of 2:1 to 3:1. In some embodiments, the total thickness of the first light-transmitting layer and the black matrix, the thickness of the second light-transmitting layer is 2 μm to 200 μm, the difference between the refractive index of the second light-transmitting layer and the refractive index of the first light-transmitting layer is 0.1 to 0.6, and the thickness ratio of the black matrix to the first light-transmitting layer is 7:3 to 9:1. In some embodiments, a quantum dot color conversion layer is arranged between the color block and the second light-transmitting layer, a buffer layer is arranged on one side, away from the first substrate, of the second light-transmitting layer, and a filling layer is arranged on one side, away from the first substrate, of the buffer layer. In some embodiments, a side of the buffer layer away from the first substrate is in the same plane as an end of the first light-transmitting layer away from the first substrate, and a refractive index of the buffer layer is greater than a refractive index of the first light-transmitting layer and less than a refractive index of the second light-transmitting layer. According to a second aspect of the application, a display panel is provided, which comprises an array substrate and the color film substrate in the first aspect, wherein the array substrate is arranged oppositely, the first substrate in the color film substrate is far away from the array substrate, the array substrate comprises a second substrate, pixel defining structures are arranged at intervals on one side of the second substrate, the pixel defining structures are arranged in one-to-one correspondence with the black matrixes, a light emitting layer is arranged between two adjacent pixel defining structures, and a packaging