Color film substrate, method for manufacturing the same and display panel

Patent metadata

Field	Value
Publication number	US-12468199-B2
Application number	US-202318682293-A
Country	US
Kind code	B2
Filing date	Feb 1, 2023
Priority date	Feb 1, 2023
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

Embodiments of the present disclosure provide a color film substrate, a method for manufacturing the same and a display device. The color film substrate includes a substrate including a plurality of first recesses extending in a first direction, respectively, a plurality of first tabs arranged alternately with the plurality of first recesses in a second direction perpendicular to the first direction, a plurality of first black matrix strips disposed at least partially on the plurality of first tabs, respectively and extending in the first direction, and a color resist layer disposed in the plurality of first recesses and in gaps among the plurality of first black matrix strips.

First claim

What is claimed is:

1 . A display panel comprising:
a color film substrate; and an array substrate disposed opposite the color film substrate, wherein the color film substrate comprises:
a substrate having:
a plurality of first recesses each extending in a first direction, and
a plurality of first tabs arranged alternately with the plurality of first recesses in a second direction perpendicular to the first direction, wherein each of the plurality of first recesses has an opening facing the array substrate such that each of the plurality of first tabs protrudes toward the array substrate;

a plurality of first black matrix strips disposed at least partially on the plurality of first tabs, respectively, and each extending in the first direction; and
a color resist layer disposed in the plurality of first recesses and in gaps between adjacent first black matrix strips of the plurality of first black matrix strips.

2 . The display panel according to claim 1 , wherein the color film substrate further comprises a plurality of second black matrix strips disposed in a different layer than the plurality of first black matrix strips, the plurality of second black matrix strips each extending in the second direction and intersecting with the plurality of first black matrix strips, to define, together with the plurality of first black matrix strips, a plurality of openings for accommodating the color resist layer.

3 . The display panel according to claim 2 , wherein the color resist layer has a thickness in a direction perpendicular to the substrate substantially equal to a sum of a depth of the first recess in the direction perpendicular to the substrate and a thickness of the first black matrix strip in the direction perpendicular to the substrate.

4 . The display panel according to claim 2 , wherein the color resist layer comprises a plurality of color resists corresponding one-to-one with the plurality of openings, and wherein at least a surface of at least one of the plurality of first black matrix strips close to the substrate has a width in the second direction greater than a width of at least one of the plurality of first tabs in the second direction such that a portion of at least one of the plurality of color resists between adjacent first black matrix strips has a width in the second direction less than a width of another portion of the at least one of the plurality of color resists in corresponding first recess.

5 . The display panel according to claim 1 , wherein a surface of at least one of the plurality of first black matrix strips facing the substrate has a width in the second direction less than a width of a surface of the at least one of the plurality of first black matrix strips opposite from the substrate such that a cross-section, perpendicular to the first direction, of the at least one of the plurality of first black matrix strips has a shape with substantial inverted trapezoid.

6 . A method for manufacturing the display panel according to claim 1 , the method comprising:
forming a color film substrate comprising:
providing a substrate;
forming on the substrate a plurality of first recesses each extending in a first direction, thereby forming a plurality of first tabs arranged alternately with the plurality of first recesses in a second direction perpendicular to the first direction; and
forming a plurality of first black matrix strips extending in the first direction such that the plurality of first black matrix strips are at least partially disposed on the plurality of first tabs; and
forming an array substrate which is opposite the color film substrate.

7 . The method according to claim 6 , further comprising:
forming a plurality of second black matrix strips each extending in the second direction such that the plurality of second black matrix strips intersect with the plurality of first black matrix strips to define, together with the plurality of first black matrix strips, a plurality of openings for accommodating the color resist layer; and forming a color resist layer in the plurality of first recesses and in gaps between adjacent black matrix strips of the plurality of first black matrix strips.

8 . The display panel according to claim 2 , wherein each of the plurality of first tabs and each of the plurality of first recesses extend continuously in the first direction, and wherein the plurality of first black matrix strips are disposed on the plurality of first tabs, respectively.

9 . The display panel according to claim 8 , wherein parts of at least one of the plurality of second black matrix strips at positions intersecting with the plurality of first black matrix strips are superimposed on the plurality of first black matrix strips.

10 . The display panel according to claim 9 , wherein a thickness of the plurality of first black matrix strips and a thickness of the plurality of second black matrix strips comprise at least one of the following:
i) at least one of the plurality of first black matrix strip strips has a substantially uniform thickness, and parts of the at least one of the plurality of second black matrix strips at the positions intersecting with the plurality of first black matrix strips have a thickness less than a thickness of parts of the at least one of the plurality of second black matrix strips at positions non-intersecting with the plurality of first black matrix strips; ii) the thickness of the parts of the at least one of the plurality of second black matrix strips at the positions intersecting with the plurality of first black matrix strips is less than the thickness of the at least one of the plurality of first black matrix strips, and wherein the thickness of the parts of the at least one of the plurality of second black matrix strips at the positions non-intersecting with the plurality of first black matrix strips is greater than the thickness of the at least one of the plurality of first black matrix strips; or iii) the thickness of the parts of the at least one of the plurality of second black matrix strips at the positions non-intersecting with the plurality of first black matrix strips is less than a sum of the thickness of the first black matrix strip and a thickness of the first tab.

11 . The display panel according to claim 1 , wherein at least one of the plurality of first recesses has a substantial rectangular cross-section perpendicular to the first direction.

12 . The display panel according to claim 2 , wherein the substrate comprises a first area and a second area, the plurality of first black matrix strips, the plurality of second black matrix strips, the plurality of first recesses, and the color resist layer being disposed in the first area of the substrate, wherein the second area comprises an additional black matrix formed integrally with the plurality of first black matrix strips or the plurality of second black matrix strips, and wherein the first area is a display area and the second area is a dummy area.

13 . The display panel according to claim 12 , wherein each first black matrix strip has a substantially uniform thickness, and wherein the additional black matrix has a thickness in a direction perpendicular to the substrate substantially equal to the thickness of at least one of the plurality of first black matrix strip strips in the direction perpendicular to the substrate.

14 . The display panel according to claim 12 , further comprising a planarization layer disposed on the plurality of first black matrix strips, the plurality of second black matrix strips, and the color resist layer, wherein the planarization layer extends

Assignees

• Ordos Yuansheng Optoelectronics Co Ltd
• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

• Yang Yuanhang
• Wang Fengguo
• Fang Yezhou
• Li Yongsheng
• Shi Zhen
• Wang Bo
• Gao Lei
• Zhang Shilong
• Yu Guojiang

Classifications

• G02F1/136209

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F1/133388

  with constructional differences between the display region and the peripheral region · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/1335

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