CN114967212B

CN114967212B - Color film substrate and liquid crystal display panel

Info

Publication number: CN114967212B
Application number: CN202210571952.3A
Authority: CN
Inventors: 柴立
Original assignee: Suzhou China Star Optoelectronics Technology Co Ltd
Current assignee: Suzhou China Star Optoelectronics Technology Co Ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2024-03-19
Anticipated expiration: 2042-05-24
Also published as: CN114967212A

Abstract

The application provides a color film substrate and a liquid crystal display panel. The color film substrate comprises: a substrate, a black matrix layer, a first color resistor and a first spacer; the black matrix layer is arranged on the substrate, the black matrix layer defines a plurality of light transmission areas on the substrate, and the light transmission areas are arranged in an array; the first color resistor is arranged on the black matrix layer, extends along a first direction and covers a plurality of light-transmitting areas in the first direction; a first via hole is formed in the first color resistor in a region corresponding to a region between the adjacent light-transmitting regions; the first spacer is disposed in the first via. The color film substrate provided by the application can avoid air bubbles and improve user satisfaction.

Description

Color film substrate and liquid crystal display panel

Technical Field

The application relates to the technical field of display, in particular to a color film substrate and a liquid crystal display panel.

Background

The liquid crystal display panel comprises an array substrate and a color film substrate, and the liquid crystal layer is arranged between the array substrate and the color film substrate. In order to obtain a liquid crystal layer with a large area and uniform thickness, a spacer is required to be arranged between the array substrate and the color film substrate so as to maintain a gap between the array substrate and the color film substrate.

However, in order to meet the requirements of high resolution, high aperture ratio and high transmittance of the lcd panel, a pixel stripe design is generally adopted to make the spacers disposed on the color resist layer. However, if the spacer is disposed on the color resist layer, the liquid crystal display panel will transmit the external pressure to the color resist layer through the spacer, so that the solvent component remained in the color resist layer volatilizes into the liquid crystal layer due to extrusion, and air bubbles (bubbles) appear, thereby causing risk of customer complaints.

Disclosure of Invention

The application provides a color film substrate and liquid crystal display panel, through with the pad thing setting in the via hole of the region between adjacent printing opacity district, avoid pad thing and look to hinder the layer contact to avoid appearing the air bubble problem, satisfy the requirement of high aperture ratio simultaneously.

In a first aspect, the present application provides a color film substrate, including:

a substrate;

the black matrix layer is arranged on the substrate, a plurality of light transmission areas are defined on the substrate, and the light transmission areas are arranged in an array mode;

the first color resistor is arranged on the black matrix layer, extends along a first direction and covers a plurality of light-transmitting areas in the first direction; wherein, the first color resistor is provided with a first via hole corresponding to the area between the adjacent light transmission areas; the method comprises the steps of,

the first spacer is arranged in the first via hole.

In the color film substrate provided by the application, the orthographic projection of the outline of the first via hole on the substrate surrounds the orthographic projection of the first spacer on the substrate.

In the color film substrate provided by the application, the outline of the first via hole is embedded with the first spacer.

In the color film substrate provided by the application, the black matrix layer comprises a first via hole area, the first via hole area is correspondingly arranged with the first via hole, the first via hole area comprises an intermediate sub-area and a peripheral sub-area surrounding the intermediate sub-area, and the first spacer is correspondingly arranged with the intermediate sub-area.

In the color film substrate provided by the application, the black matrix layer comprises a first area and a second area, and the first spacer is correspondingly arranged on the first area; the thickness of the first region is greater than the thickness of the second region.

In the color film substrate provided by the application, the difference between the thickness of the first region and the thickness of the second region is equal to the thickness of the first color resistor.

In the color film substrate provided by the application, the color film substrate further comprises a second color resistor, the second color resistor is arranged on the black matrix layer, the second color resistor extends along the first direction, the second color resistor covers a plurality of light-transmitting areas positioned in the first direction, second through holes are formed in the second color resistor corresponding to the areas between the adjacent light-transmitting areas, and the first color resistor and the second color resistor are arranged at intervals along the second direction; the color film substrate further comprises a second spacer, and the second spacer is arranged in the second via hole.

In the color film substrate provided by the application, the first via hole is close to a spacing region between the first color resistor and the second color resistor.

In the color film substrate provided by the application, the color film substrate further comprises a third color resistor, the third color resistor is arranged on the black matrix layer, the third color resistor extends along the first direction, the third color resistor covers a plurality of light-transmitting areas positioned in the first direction, a third via hole is formed in the third color resistor corresponding to an area between adjacent light-transmitting areas, and the first color resistor, the second color resistor and the third arrangement are arranged at intervals along the second direction; the first color resistor is red, the second color resistor is green, and the third color resistor is blue.

In a second aspect, the application further provides a liquid crystal display panel, which includes an array substrate and a color film substrate opposite to the array substrate, where the color film substrate is the foregoing color film substrate.

The color film substrate and the liquid crystal display panel provided by the application are characterized in that a first through hole is formed in the first color resistor corresponding to the area between the adjacent light-transmitting areas, a first spacer is arranged in the first through hole, the first spacer is arranged on the black matrix layer through the first through hole, the first spacer is prevented from being in direct contact with the first color resistor, the first spacer is prevented from transmitting external pressure to the first color resistor, and air bubbles are prevented from being generated.

Drawings

FIG. 1 is a schematic plan view of a color film substrate in the prior art;

FIG. 2 is a cross-sectional view of the color film substrate of FIG. 1 taken along the line A-A;

fig. 3 is a schematic plan view of a first planar structure of a color film substrate provided in an embodiment of the present application;

FIG. 4 is a cross-sectional view of a first A-A of the color film substrate of FIG. 3;

FIG. 5 is a cross-sectional view of a second A-A section of the color film substrate of FIG. 3;

fig. 6 is a first plan view of a black matrix layer region corresponding to a first via hole in the color film substrate shown in fig. 3;

FIG. 7 is a schematic plan view of a second type of black matrix layer region corresponding to the first via hole in the color film substrate shown in FIG. 3;

FIG. 8 is a cross-sectional view of a third A-A section of the color film substrate of FIG. 3;

FIG. 9 is a cross-sectional view of a fourth A-A of the color film substrate of FIG. 3;

fig. 10 is a schematic diagram of a second planar structure of a color film substrate according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

Furthermore, the terms first, second and the like in the description and in the claims, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. The terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion.

The liquid crystal display panel comprises an array substrate, a color film substrate arranged opposite to the array substrate and a liquid crystal layer arranged between the array substrate and the color film substrate, wherein the color film substrate is a main component for colorizing in the liquid crystal display panel. Meanwhile, in order to maintain the thickness of the liquid crystal display panel, the liquid crystal layer is prevented from being extruded between the array substrate and the color film substrate to influence normal display, a spacer is arranged between the color film substrate and the array substrate to control the gap between the color film substrate and the array substrate and ensure the thickness uniformity of the liquid crystal layer.

Referring to fig. 1 and 2, fig. 1 is a schematic plan view of a structure of a color film substrate in the prior art, and fig. 2 is a sectional view of A-A of the color film substrate in fig. 1. As shown in fig. 1, a color film substrate 01 in the prior art sequentially includes a substrate 1, a black matrix layer 2, a color resist layer 3, and a spacer 4 directly disposed on one surface of the color resist layer 3 away from the substrate 1, where the black matrix layer 2 and the substrate 1 define a light-transmitting region. In order to ensure a high aperture ratio of the liquid crystal display panel, the color resist layers 3 located in the adjacent light-transmitting regions are continuously arranged as shown in fig. 2. However, since the color resist layers 3 of adjacent light transmitting regions are continuously provided, the spacer 4 needs to be provided on the side of the color resist layer 3 away from the substrate 1 in order to play a role in supporting the gap between the color film substrate and the array substrate. The liquid crystal display panel will transmit the external pressure to the color resist layer 3 through the spacer 4. Thus, the solvent component remained in the color resist layer 3 due to the process problem volatilizes into the liquid crystal layer due to the external pressure, resulting in the occurrence of air bubbles.

Therefore, the embodiment of the application provides a novel color film substrate. Referring to fig. 3, fig. 3 is a schematic plan view of a first planar structure of a color film substrate according to an embodiment of the present application. As shown in fig. 3, the color film substrate 10 includes a substrate 1, a black matrix layer 2, a first color resistor 31, and a first spacer 41. The substrate 1 is a glass substrate or a transparent substrate made of other materials. The black matrix layer 2 is disposed on the substrate 1, so that the black matrix layer 2 defines a plurality of light-transmitting areas on the substrate 1, and the plurality of light-transmitting areas are arranged in an array. The first color resist 31 is disposed on the black matrix layer 2, the first color resist 31 extends along a first direction, and the first color resist 31 covers a plurality of light-transmitting regions located in the first direction.

It should be noted that, in the color film substrate 10 provided in the embodiment of the present application, the first via hole 51 is disposed in the first color resistor 31 corresponding to the area between the adjacent light-transmitting areas. Specifically, referring to fig. 4, fig. 4 is a cross-sectional view of a first A-A of the color film substrate shown in fig. 3. As shown in fig. 4, the first via hole 51 penetrates through the first color resistor 31, so that a part of the black matrix layer 2 is exposed through the first via hole 51, and thus the first spacer 41 is disposed in the first via hole 51, so that the first spacer 41 is directly disposed on the black matrix layer 2, and the first spacer 41 is prevented from contacting the first color resistor 31.

Therefore, the color film substrate 10 provided in the present embodiment can avoid the first color resistor 31 from being extruded from the outside due to the contact with the first spacer 41, thereby avoiding the occurrence of air bubbles.

It should be noted that the first spacer 41 may have a cylindrical structure, for example, a cylindrical structure or a prismatic structure. With continued reference to fig. 4, when the first spacer 41 has a cylindrical structure, the cross section of the first spacer 41 in the A-A direction is rectangular. Of course, the first spacer 41 may have a truncated cone structure, for example, a truncated cone structure or a prismatic truncated cone structure. Specifically, referring to fig. 5, fig. 5 is a cross-sectional view of a section A-A of the color film substrate in fig. 3, as shown in fig. 5, the first spacer 41 is in a table structure, the cross-section of the first spacer 41 in the direction A-A is trapezoidal, and the bottom area of the first spacer 41 contacting the black matrix layer 2 is larger than the top bottom area of the first spacer 41.

In some embodiments provided herein, the orthographic projection of the profile of the first via 51 on the substrate 1 surrounds the orthographic projection of the first spacer 41 on the substrate 1, that is, the orthographic projection area of the first via 51 on the substrate 1 is greater than or equal to the orthographic projection area of the first spacer 41 on the substrate 1.

Specifically, referring to fig. 3, fig. 4, and fig. 6, fig. 6 is a first plan view of a black matrix layer region corresponding to a first via hole in the color film substrate shown in fig. 3. As shown in fig. 3, 4 and 6, the black matrix layer 2 includes a first via region 21, and the first via region 21 is disposed corresponding to the first via 51, and the first via region 21 includes an intermediate sub-region 211 and a peripheral sub-region 212 disposed around the intermediate sub-region 211. The first spacers 41 are disposed corresponding to the middle sub-region 211, so that the first spacers 41 are disposed in the first via hole region 21 of the black matrix layer 2 through the first via holes 51, and the first spacers 41 are disposed in the middle sub-region 211 of the first via hole region 21, so that the orthographic projection area of the first via holes 51 on the substrate 1 is larger than the orthographic projection area of the first spacers 41 on the substrate 1.

It should be noted that, fig. 6 shows that the pattern of the first via hole region 21 and the pattern of the middle subregion 211 are rectangular and the pattern of the first spacer 41 is elliptical, and the pattern shown in fig. 6 is merely for explaining the case where the first spacer 41 is disposed in the middle subregion 211 of the first via hole region 21. The pattern of the first via area 21 and the pattern of the middle sub-area 211 may also be presented as one of a circle, an ellipse, a triangle, and other polygons, and the pattern of the first spacer 41 may also be presented as one of a circle, a triangle, and other polygons.

Specifically, referring to fig. 3, fig. 4, and fig. 7, fig. 7 is a second schematic plan view of a black matrix layer region corresponding to the first via hole in the color film substrate shown in fig. 3. As shown in fig. 6, the orthographic projection pattern of the first spacer 41 on the substrate 1 is elliptical, and the ellipse is tangent to four sides of the first via area 21 with a rectangular pattern, that is, the orthographic projection pattern of the first spacer 41 on the substrate 1 is tangent to the first via area 21 pattern, so fig. 6 shows the case where the outline of the first via 51 is fitted with the first spacer 41.

It should be noted that, fig. 7 shows the pattern of the first via region 21 and the pattern of the first spacer 41, and should not be taken as a limitation of the fitting of the first via 51 and the first spacer 41 in the present embodiment. The pattern shown in fig. 6 is merely for explaining a case where the first spacer 41 is fitted in the first via region 21. The pattern of the first via area 21 and the pattern of the first spacer 41 may also be one of a circle, an ellipse, a triangle, and other polygons, where the pattern of the first via area 21 and the pattern of the first spacer 41 completely overlap.

In some embodiments provided herein, referring to fig. 8, fig. 8 is a cross-sectional view of a third A-A of the color film substrate shown in fig. 3. As shown in fig. 8, the color film substrate provided in this embodiment is different from the foregoing color film substrate in that: in this embodiment, the black matrix layer 2 includes a first region 201 and a second region 202, where the thickness of the first region 201 is greater than that of the second region 202, and the first spacers 41 are correspondingly disposed on the first region 201.

In the present embodiment, by setting the black matrix layer 2 to the first region 201 and the second region 202 having different thicknesses, the thickness of the first region 201 is h1, the thickness of the second region 202 is h2, and h1> h2. The first spacers 41 are correspondingly arranged in the first region 201 with the thickness larger than that of the second region 202, so that the depth of the first via holes 51 is reduced, and the first spacers 41 are conveniently arranged on the first region 201 of the black matrix layer 2 through the first via holes 51. At the same time, the area of the first spacer 41 that is deformed to be in contact with the first color resist 31 is relatively reduced based on the reduced depth of the first via hole 51. Thereby further avoiding the first spacer 41 from transmitting pressure from the outside to the first color resistor 31 and further avoiding occurrence of air bubbles.

In some embodiments provided herein, referring to fig. 9, fig. 9 is a cross-sectional view of a fourth A-A of the color film substrate shown in fig. 3. As shown in fig. 9, the color film substrate provided in this embodiment is different from the foregoing color film substrate in that: in the present embodiment, the thickness h3 of the first color resist 31 is equal to the thickness h1 of the first region 201. In some embodiments provided herein, the difference between the thickness h1 of the first region 201 and the thickness h2 of the second region 202 is equal to the thickness h3 of the first color resistor 31.

In some embodiments provided in the present application, please refer to fig. 10, fig. 10 is a schematic plan view of a second planar structure of the color film substrate provided in the embodiment of the present application.

As shown in fig. 10, the color film substrate 10 further includes a second color resistor 32 and a second spacer 42, where the second color resistor 32 is disposed on the black matrix layer 2. The second color resistor 32 extends along the first direction, the second color resistor 32 covers a plurality of light transmission areas located in the first direction, a second via 52 is arranged on the second color resistor 32 corresponding to an area between adjacent light transmission areas, the first color resistor 31 and the second color resistor 32 are arranged at intervals along the second direction, and the second spacer 42 is arranged in the second via 52.

With continued reference to fig. 10, the color film substrate 10 further includes a third resistor 33 and a third spacer 43, where the third resistor 33 is disposed on the black matrix layer 2. The third color resistor 33 extends along the first direction, the third color resistor 33 covers the plurality of light-transmitting areas in the first direction, the third via 53 is arranged on the third color resistor 33 corresponding to the area between the adjacent light-transmitting areas, the third color resistor 33, the first color resistor 31 and the second color resistor 32 are arranged at intervals along the second direction, and the third spacer 43 is arranged in the third via 53.

Note that, in the present embodiment, the first via hole 51 is disposed near the interval region between the first color resist 31 and the second color resist 32, and the second via hole 52 is disposed near the interval region between the second color resist 32 and the third color resist 33. Through setting up the via hole in being close to the interval region between the adjacent color resistance to make the via hole keep away from the printing opacity region rather than adjacent, and then can effectively reduce the pad thing and contact with the color resistance layer and transmit and come from external pressure because of taking place deformation, the direct influence that produces the color resistance layer in the printing opacity region that this pad thing is adjacent.

It should be noted that, in the embodiment provided in the present application, the second direction is different from the first direction, and specifically, the second direction is perpendicular to the first direction.

In the present embodiment, the first color resistor 31 is a red color resistor, the second color resistor 32 is a green color resistor, and the third color resistor 33 is a blue color resistor. Therefore, the light resistance patterns with the same color can be arranged in the light transmission areas of the same row or the same column and correspondingly extend to the upper part of the black matrix layer 2 between the corresponding adjacent light transmission areas, so as to form continuous strip-shaped light resistance patterns, thereby meeting the requirement of high aperture ratio while avoiding the occurrence of air bubbles.

In another aspect of the present application, a liquid crystal display panel is provided, where the liquid crystal display panel includes an array substrate and a color film substrate disposed opposite to the array substrate, and the color film substrate is the color film substrate described in the foregoing embodiment. The liquid crystal display panel of this application sets up the via hole through corresponding the region between the adjacent printing opacity district on same color hinders, sets up the pad thing in the via hole, makes the pad thing set up on black matrix layer through the hole to avoid pad thing and color to hinder direct contact, thereby avoid the pad thing to hinder to first color with external pressure transmission, and then avoid the air bubble to appear, satisfy the requirement of high aperture ratio simultaneously, improve user satisfaction.

It should be noted that the color film substrate provided by the present application may be suitable for various modes of display devices, such as a TN (twisted nematic) mode, a VA (vertical alignment) mode, an ADS (Advanced SuperDimension Switch) mode, and other modes. The ADS mode is to form a multidimensional electric field by an electric field generated by the edges of the slit electrodes in the same plane and an electric field generated between the slit electrode layers and the plate electrode layers, so that all oriented liquid crystal molecules in the liquid crystal box between the slit electrodes and right above the electrodes can rotate, thereby improving the working efficiency of the liquid crystal and increasing the light transmission efficiency. The high-level super-dimensional field conversion technology can improve the picture quality of LCD products, and has the advantages of high resolution, high transmittance, low power consumption, wide viewing angle, high aperture ratio, low chromatic aberration, no extrusion water ripple and the like. Therefore, the color film substrate provided by the application is particularly suitable for being used in an ADS mode display device.

The foregoing is only examples of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims

1. The utility model provides a various membrane base plate which characterized in that includes:

a substrate;

the black matrix layer is arranged on the substrate, a plurality of light transmission areas are defined on the substrate, the light transmission areas are arranged in an array, the black matrix layer comprises a first area and a second area, and the thickness of the first area is larger than that of the second area;

the first spacer is arranged in the first via hole and is correspondingly arranged on the first area;

the difference between the thickness of the first region and the thickness of the second region is equal to the thickness of the first color resistor.

2. The color filter substrate of claim 1, wherein an orthographic projection of a profile of the first via on the substrate surrounds an orthographic projection of the first spacer on the substrate.

3. The color film substrate according to claim 1, further comprising a second color resistor disposed on the black matrix layer, the second color resistor extending along the first direction, the second color resistor covering the plurality of light-transmitting regions in the first direction, the second color resistor having second vias corresponding to regions between adjacent light-transmitting regions, and the first color resistor and the second color resistor being disposed at intervals along a second direction;

the color film substrate further comprises a second spacer, and the second spacer is arranged in the second via hole.

4. The color filter substrate according to claim 3, wherein the first via is disposed near a spacing region between the first color resistor and the second color resistor.

5. The color film substrate according to claim 3, further comprising a third color resistor disposed on the black matrix layer, the third color resistor extending along the first direction, the third color resistor covering the plurality of light-transmitting regions in the first direction, a third via being disposed on the third color resistor corresponding to a region between adjacent light-transmitting regions, and the first color resistor, the second color resistor, and the third color resistor being disposed at intervals along the second direction;

the first color resistor is red, the second color resistor is green, and the third color resistor is blue.

6. A liquid crystal display panel, comprising an array substrate and a color film substrate arranged opposite to the array substrate, wherein the color film substrate is the color film substrate according to any one of claims 1 to 5.