CN111007677B

CN111007677B - Color film substrate, preparation method thereof and display panel

Info

Publication number: CN111007677B
Application number: CN201911233921.1A
Authority: CN
Inventors: 方菲
Original assignee: TCL Huaxing Photoelectric Technology Co Ltd
Current assignee: TCL Huaxing Photoelectric Technology Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2022-04-26
Anticipated expiration: 2039-12-05
Also published as: CN111007677A

Abstract

The application discloses a color film substrate, a preparation method thereof and a display panel, wherein the color film substrate is provided with a display area and a non-display area positioned at the periphery of the display area, and comprises a first substrate and a first alignment layer; the part of the first substrate corresponding to the non-display area is provided with at least one first annular groove; the first alignment layer is positioned in the display area and the non-display area of the color film substrate, and part of the first alignment layer positioned in the non-display area is arranged in the first annular groove, so that the problem of uneven display brightness caused by uneven alignment layer film thickness and irregular alignment layer edge is solved.

Description

Color film substrate, preparation method thereof and display panel

Technical Field

The application relates to the technical field of display, in particular to a color film substrate, a manufacturing method thereof and a display panel.

Background

At present, the processing steps of the color film substrate are gradually reduced, and only one process of depositing the indium tin oxide film layer is reserved finally, so that the terrain is flat. In the subsequent box forming process, the coated Polyimide (PI) can diffuse freely on the substrate, which easily generates the coffee ring effect, so that the thickness of the peripheral film of the PI layer is uneven, the peripheral of the PI layer forms an area with irregular shape and poor linearity, which affects the alignment of the liquid crystal, and further causes the problem of uneven brightness of the periphery of the display panel due to poor alignment of the liquid crystal at the periphery of the display panel.

Disclosure of Invention

The embodiment of the application provides a color film substrate, a preparation method thereof and a display panel, and aims to solve the problem of uneven display brightness caused by uneven alignment layer film thickness and irregular alignment layer edge in the existing display panel.

The embodiment of the application provides a color film substrate, which is provided with a display area and a non-display area positioned at the periphery of the display area, the color film substrate comprises a first substrate and a first alignment layer,

the part of the first substrate corresponding to the non-display area is provided with at least one first annular groove;

the first alignment layer is located in the display area and the non-display area of the color film substrate, and part of the first alignment layer located in the non-display area is arranged in the first annular groove.

In some embodiments, the first substrate comprises a first substrate and a first conductive layer,

the first conducting layer is arranged on the surface of the first substrate and is positioned in a display area and a non-display area of the color film substrate, and the first annular groove is arranged on the first conducting layer positioned in the non-display area;

the first alignment layer is formed on the surface, far away from the first substrate, of the first conducting layer.

In some embodiments, the depth of the first annular groove is less than the thickness of the first conductive layer.

In some embodiments, the first conductive layer is made of a material including at least one of indium tin oxide, indium zinc oxide, and zinc oxide.

In some embodiments, the color filter substrate includes a first substrate and a black matrix layer,

part of the black matrix layer is arranged on the surface of the first substrate and is positioned in a non-display area of the color film substrate, the first annular groove is arranged on the black matrix layer positioned in the non-display area,

the first alignment layer in the non-display area is located on the surface, away from the first substrate, of the black matrix layer in the non-display area.

In some embodiments, the depth of the first annular groove is greater than 0 nanometers and less than or equal to 100 nanometers, and the width of the first annular groove is greater than or equal to 10 micrometers and less than or equal to 100 micrometers.

The application also provides a preparation method of the color film substrate, which comprises the following steps:

s10: providing a first substrate, wherein the first substrate is provided with a display area and a non-display area positioned at the periphery of the display area;

s20, forming at least one first annular groove on the first substrate corresponding to the non-display region;

s30, forming a first alignment layer on the display region and the non-display region of the first substrate, wherein the first alignment layer in the non-display region is formed in the first annular groove.

In some embodiments, the step S30 includes the following steps:

s301: dropping alignment liquid drops on the part of the first substrate corresponding to the display area and the part of the first substrate corresponding to the non-display area respectively;

s302: and enabling the alignment liquid drops to form alignment liquid films in the display area and the non-display area by using an air knife, and enabling part of the alignment liquid films to be located in the first annular groove.

In some embodiments, the mass of the alignment liquid droplet dropped to the non-display region is 1.5 to 2 times the mass of the alignment liquid droplet dropped to the display region.

The embodiment of the application provides a display panel, which comprises a color film substrate and an array substrate arranged opposite to the color film substrate, wherein the array substrate is provided with a display area and a non-display area and comprises a second substrate and a second alignment layer,

at least one second annular groove is formed in the part, corresponding to the non-display area of the array substrate, of the second substrate;

the second alignment layer is located in the display region and the non-display region of the array substrate, and a part of the second alignment layer located in the non-display region is disposed in the second annular groove.

The color film substrate comprises a display area and a non-display area located on the periphery of the display area, and the color film substrate comprises a first substrate and a first alignment layer; the part of the first substrate corresponding to the non-display area is provided with at least one first annular groove; the first alignment layer is located in the display area and the non-display area of the color film substrate, and a part of the first alignment layer located in the non-display area is arranged in the first annular groove, so that the film thickness of the first alignment layer in the edge area is reduced, and the boundary of the first alignment layer has linearity. And in the preparation process, air knife equipment is adopted to diffuse the alignment liquid drops to the first annular groove to form a first alignment layer with linear edges. The color film substrate and the array substrate are combined to form the display panel through a box forming process, so that the problem of uneven display brightness caused by uneven alignment layer film thickness and irregular alignment layer edge is solved.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1A is a schematic structural diagram of a color film substrate according to a first embodiment of the present application;

fig. 1B is a cross-sectional view taken along the line a-a' of the color filter substrate shown in fig. 1A;

fig. 2A is a schematic structural diagram of a color film substrate according to a second embodiment of the present application;

fig. 2B is a cross-sectional view taken along the line B-B' of the color filter substrate shown in fig. 2A;

fig. 3A is a schematic structural diagram of a color film substrate according to a third embodiment of the present application;

fig. 3B is a cross-sectional view taken along the line C-C' of the color filter substrate shown in fig. 3A;

fig. 4A is a schematic structural diagram of a color film substrate according to a fourth embodiment of the present application;

fig. 4B is a cross-sectional view taken along the line D-D' of the color filter substrate shown in fig. 4A;

fig. 5A is a schematic structural diagram of a color film substrate according to a fifth embodiment of the present application;

fig. 5B is a cross-sectional view taken along the line E-E' of the color filter substrate shown in fig. 5A;

fig. 6A is a schematic structural view of a color film substrate according to a sixth embodiment of the present application;

fig. 6B is a cross-sectional view taken along the line F-F' of the color filter substrate shown in fig. 6A;

fig. 7 is a flowchart of a manufacturing method of a color filter substrate according to an embodiment of the present disclosure;

fig. 8 is a schematic diagram illustrating a ratio of alignment liquid droplets in a display region and a non-display region according to an embodiment of the present disclosure;

fig. 9A to 9D are schematic cross-sectional views illustrating the use of an air knife device to assist the spreading of alignment liquid droplets according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural view of an air knife device;

fig. 11 is a schematic position diagram of an air knife device and a machine provided in the embodiment of the present application;

FIG. 12 is a schematic structural diagram of a display panel according to a first embodiment of the present application;

FIG. 13 is a schematic view of a display panel according to a second embodiment of the present application;

FIG. 14 is a schematic structural diagram of a display panel according to a third embodiment of the present application;

FIG. 15 is a schematic view of a display panel according to a fourth embodiment of the present application;

fig. 16 is a schematic structural diagram of a display panel according to a fifth 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 is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Specifically, please refer to fig. 1A, which is a schematic structural diagram of a color film substrate 100 according to a first embodiment of the present application. The color film substrate 100 has a display area and a non-display area located at the periphery of the display area, wherein 100a represents the boundary of the display area, and 100b represents the boundary of the non-display area.

Referring to fig. 1B, which is a cross-sectional view taken along a line a-a' of the color filter substrate shown in fig. 1A, the color filter substrate 100 includes:

a first substrate 101 and a first alignment layer 102,

the part of the first substrate 101 corresponding to the non-display area is provided with at least one first annular groove 1001;

the first alignment layer 102 is located in the display region and the non-display region of the color film substrate 100, and a part of the first alignment layer 102 located in the non-display region is disposed in the first annular groove 1001, so as to reduce the film thickness of the first alignment layer 102 in the edge region, so that the film thickness of the first alignment layer 102 has uniformity, and the boundary 102a of the first alignment layer 102 may form a regular ring shape having the same shape as the first annular groove 1001, so that the boundary 102a of the first alignment layer 102 has linearity.

Specifically, the first annular groove 1001 is formed by a bottom wall 1001a and inner and

outer sidewalls

1001b and 1001c located on opposite sides of the bottom wall 1001a, and the first alignment layer 102 contacts the outer sidewall 1001c at the boundary 102a of the non-display region.

Fig. 2A is a schematic structural diagram of a color film substrate according to a second embodiment of the present application; as shown in fig. 2B, which is a cross-sectional view taken along the line B-B' of the color filter substrate shown in fig. 2A, the first substrate 101 includes a first substrate 1011 and a first conductive layer 1012,

the first conductive layer 1012 is disposed on the surface of the first substrate 1011 and located in the display area and the non-display area of the color film substrate 100, and the first annular groove 1001 is disposed on the first conductive layer 1012 located in the non-display area;

the first alignment layer 102 is formed on the surface of the first conductive layer 1012 away from the first substrate 1011.

The depth of the first annular groove 1001 is less than the thickness of the first conductive layer 1012; specifically, the depth of the first annular groove 1001 is greater than 0 nm and less than or equal to 100 nm, and the width of the first annular groove 1001 is greater than or equal to 10 microns and less than or equal to 100 microns.

The first conductive layer 1012 is made of a material including at least one of indium tin oxide, indium zinc oxide, and zinc oxide. The first alignment layer 102 is made of polyimide.

Please refer to fig. 3A, which is a schematic structural diagram of a color film substrate according to a third embodiment of the present application; as shown in fig. 3B, which is a cross-sectional view taken along the line C-C' of the color filter substrate shown in fig. 3A, the color filter substrate 100 includes a first substrate 1011 and a black matrix layer 103,

a part of the black matrix layer 103 is disposed on the surface of the first substrate 1011 and located in the non-display area of the color filter substrate 100, the first annular groove 1001 is disposed on the black matrix layer 103 located in the non-display area,

the first alignment layer 102 in the non-display region is located on the surface of the black matrix layer 103 in the non-display region away from the first substrate 1011.

The black matrix layer 103 is 103a at the boundary of the non-display region.

Please refer to fig. 4A, which is a schematic structural diagram of a color film substrate according to a fourth embodiment of the present application; as shown in fig. 4B, the cross-sectional view is a cross-sectional view cut along a line D-D' of the color filter substrate shown in fig. 4A, the color filter substrate 100 further includes a color filter layer 104, the color filter layer 104 is located on a side surface of the first substrate 1011, the color filter layer 104 includes a plurality of color blocks, and the color blocks are spaced from the black matrix on the black matrix layer 103;

the first conductive layer 1012 has the first annular groove 1001 at a surface of a side away from the first substrate 1011 and a portion corresponding to the non-display region; the first alignment layer 102 is located in the first annular groove 1001 at the boundary 102a of the non-display area, so as to reduce the film thickness of the first alignment layer 102 in the edge area, and make the boundary 102a of the first alignment layer 102 have linearity.

Fig. 5A is a schematic structural diagram of a color film substrate according to a fifth embodiment of the present application; as shown in fig. 5B, which is a cross-sectional view cut along a line E-E' of the color filter substrate shown in fig. 5A, at least a portion of the black matrix layer 103 corresponding to the non-display region is not covered by the first conductive layer 1012, and the first annular groove 1001 is disposed in a region of the black matrix layer 103 that is not covered by the first conductive layer 1012.

In the non-display region, the boundary 1012a of the first conductive layer 1012 is located within the boundary 103a of the black matrix layer 103, that is, the boundary 1012a of the first conductive layer 1012 is closer to the boundary 100a of the display region with respect to the boundary 103a of the black matrix layer 103, and the first annular groove 1001 is provided in a region of the black matrix layer 103 not covered with the first conductive layer 1012. Accordingly, the depth of the first annular groove 1001 is smaller than the thickness of the black matrix layer 103. The black matrix layer 103 comprises a plurality of black matrixes, the color film layer 104 comprises a plurality of RGB color blocks, and the black matrixes are arranged at intervals with the color blocks.

Fig. 6A is a schematic structural diagram of a color film substrate according to a sixth embodiment of the present application; as shown in fig. 6B, which is a cross-sectional view cut along a line F-F' of the color filter substrate shown in fig. 6A, the color filter substrate 100 further includes a first protective layer 105 located on a side of the first conductive layer 1012 close to the black matrix layer 103 and the color filter layer 104; in the non-display region, the boundary 1012a of the first conductive layer 1012 is located within the boundary of the first protective layer 105, the first annular groove 1001 is provided in the region of the first protective layer 105 not covered by the first conductive layer 1012, and accordingly, the depth of the first annular groove 1001 is smaller than the thickness of the first protective layer 105.

Please refer to fig. 7, which is a flowchart illustrating a process for fabricating a color filter substrate according to an embodiment of the present disclosure; the preparation method comprises the following steps:

The first conducting layer is prepared on the first substrate by adopting one of physical vapor deposition, chemical vapor deposition, atomic layer deposition, evaporation and sputtering, and the first annular groove is obtained by a yellow light process or laser etching. Specifically, when the first annular groove is prepared by a yellow light process, the step S20 further includes:

s201: coating a photoresist layer on the surface of the first conductive layer;

s202: exposing the photoresist layer by using a half-tone photomask;

s203: developing the photoresist layer;

s204: etching the first conductive layer to obtain the first annular groove;

s205: and stripping the photoresist layer.

The halftone mask comprises a reserved part and a half reserved part, the first conducting layer corresponding to the reserved part is completely reserved after etching, and the first conducting layer corresponding to the half reserved part is partially reserved after etching.

The step S30 includes the following steps:

The longitudinal section of the first annular groove is one of a rectangle, an arc or an inverted trapezoid, so that the alignment liquid drops can be conveniently diffused to the first annular groove.

The alignment liquid film needs to be cured to form the alignment layer; in order to enable the alignment layer to have better film thickness uniformity and edge linearity, the dropping amount of the alignment liquid drops corresponding to the display area and the non-display area is controlled, and air knife equipment is adopted to assist the diffusion of the alignment liquid drops.

Specifically, please refer to fig. 8, which is a schematic diagram of a ratio of the alignment liquid droplets in the display area to the non-display area according to an embodiment of the present disclosure, wherein a mass of the alignment liquid droplet 1021b dropped to the non-display area is 1.5-2 times a mass of the alignment liquid droplet 1021a dropped to the display area.

Please refer to fig. 9A to 9D, which are schematic cross-sectional views of the alignment liquid droplet diffusion assisted by an air knife device according to the embodiment of the present application, that is, on the basis of a cross-sectional view obtained by cutting along G-G' in fig. 8, the alignment liquid droplet 1021b is diffused assisted by an air knife device; the step S302 includes:

s3021: the air knife device starts to work, the inner air knife 1061 is located at the display area boundary 100a, and the outer air knife 1062 is located at the inner side wall 1001b of the first annular groove 1001, please refer to fig. 9A;

s3022: uniformly moving the inner air knife 1061 and the outer air knife 1062 to the non-display area, so that the alignment liquid droplets 1021B are diffused to the first annular groove 1001, please refer to fig. 9B;

s3023: when the outer air knife 1062 moves to the outer sidewall 1001C of the first annular groove 1001, the movement stops, and the inner air knife 1061 continues to move to the outer sidewall 1001C of the first annular groove 1001, please refer to fig. 9C;

s3024: the inner air knife 1061 stops moving when moving to the outer sidewall 1001c of the first annular groove 1001, and the air knife device is closed after the alignment liquid droplets 1021b flow flat, please refer to fig. 9D.

If the liquid drop 1031b of the alignment liquid corresponding to the non-display region has a distance from the inner sidewall 1001b of the first annular groove 1001, the step S3022 includes:

s30221: uniformly moving the inner air knife 1061 to the non-display area, and keeping the outer air knife 1062 still;

s30222: when the alignment liquid droplets 1021b spread to the inner sidewall 1001b of the first annular groove 1001, the inner air knife 1061 continues to move uniformly, and the outer air knife 1062 moves uniformly toward the outer sidewall 1001 c.

Please refer to fig. 10, which is a schematic structural diagram of an air knife apparatus, the air knife apparatus includes an air knife 301 and a displacement control rod 302, and two sides of the displacement control rod 302 are provided with a control device (not shown in the figure) for controlling the movement of the air knife 301, and the control device is a motor.

The air outlet of the air knife device is located on one side of the air knife 301 away from the displacement control rod 302, and the length of the air knife 301 is greater than or equal to that of the substrate placed on the machine platform.

Please refer to fig. 11, which is a schematic position diagram of an air knife device and a machine according to an embodiment of the present disclosure; the machine table at least comprises a carrying table 401 and a guide rail 403, and two ends of the displacement control rod 402 are located on the guide rail 403, so that the air knife device can move along the guide rail 403 to assist the alignment liquid droplets to diffuse into the first annular groove. The machine is an alignment liquid coating machine (i.e. PIP machine).

In order to improve the preparation efficiency, two pairs of air knives, namely a first air knife and a second air knife, can be arranged, and the first air knife and the second air knife are arranged vertically and are positioned on different planes; specifically, the guide rail 403 has a first guide rail 4031 and a second guide rail 4032, the first guide rail 4031 and the second guide rail 4032 are arranged perpendicular to each other, two ends of the first air knife are located on the first guide rail 4031, two ends of the second air knife are located on the second guide rail 4032, and the first guide rail 4011 and the second guide rail 4012 are arranged at different heights.

When the first air knife (the second air knife) works, the second air knife (the first air knife) is positioned outside the preparation area of the machine table, so that the first air knife and the second air knife are prevented from being influenced mutually.

Please refer to fig. 12, which is a schematic structural diagram of a display panel according to a first embodiment of the present disclosure, the display panel includes the color filter substrate 100, and an array substrate 200 disposed opposite to the color filter substrate 100, the array substrate 200 has a display area and a non-display area, the array substrate 200 includes a second substrate 201 and a second alignment layer 202,

at least one second annular groove 2001 is formed in a portion of the second substrate 201 corresponding to the non-display region of the array substrate 200;

the second alignment layer 202 is disposed in the display region and the non-display region of the array substrate 200, and a portion of the second alignment layer 202 disposed in the non-display region is disposed in the second annular groove 2001.

The display panel further includes liquid crystal molecules 107 and sealant 108 between the color film substrate 100 and the array substrate 200.

Referring to fig. 13, which is a schematic structural diagram of a display panel according to a second embodiment of the present application, the second substrate 201 includes a second substrate 2011 and a second conductive layer 2012; the second conductive layer 2012 is disposed on the surface of the second substrate 2011 and is located in the display area and the non-display area of the array substrate 200, the second annular groove 2001 is disposed on the second conductive layer 2012 located in the non-display area, the second alignment layer 202 is located on a side surface of the second conductive layer 2012 far away from the second substrate 2011, the second alignment layer 202 is located in the second annular groove 2001 on the boundary of the non-display area, and the depth of the second annular groove 2001 is smaller than the thickness of the second conductive layer 2012.

Referring to fig. 14, which is a schematic structural view of a display panel according to a third embodiment of the present disclosure, the array substrate 200 further includes a second protective layer 203, the second protective layer 203 is located between the second conductive layer 2012 and the second alignment layer 202, the second annular groove 2001 is disposed in a region of the second protective layer 203 corresponding to the non-display region, and a depth of the second annular groove 2001 is smaller than a thickness of the second protective layer 203.

Referring to fig. 15, which is a schematic structural view of a display panel according to a fourth embodiment of the present disclosure, the color film layer 104 is disposed on the array substrate 200 side, and specifically, the color film layer 104 is disposed on a side of the second protection layer 203 away from the second alignment layer 202.

Referring to fig. 16, which is a schematic structural view of a display panel according to a fifth embodiment of the present application, the second annular groove 2001 is not disposed on the array substrate 200.

The color film substrate, the manufacturing method thereof, and the display panel in the embodiments of the present application are only described in a manner that one groove is disposed on the first substrate, the first conductive layer, the first protective layer, the black matrix layer, the second substrate, the second conductive layer, or the second protective layer, but this is not intended to limit the present invention, and a person skilled in the art may set a plurality of grooves according to actual situations, where the plurality of grooves may be disposed on the same film layer or may be disposed on different film layers; similarly, due to the difference in structure, the manner of each color film substrate or display panel is not limited to the structure in the embodiment of the present application, so that those skilled in the art can arrange the grooves on different films according to practical situations, for example, on a film (BPS) where the black matrix and the spacers are combined, so as to ensure better film thickness uniformity and edge linearity when coating the polyimide layer; since the setting manner is similar to that in the embodiments of the present application, no further description is provided herein.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The color film substrate, the manufacturing method thereof, and the display panel provided in the embodiments of the present application are described in detail above, and specific examples are applied herein to explain the principle and the implementation manner of the present application, and the description of the embodiments above is only used to help understand the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A preparation method of a color film substrate is characterized by comprising the following steps:

s30, forming a first alignment layer in the display region and the non-display region of the first substrate, wherein the first alignment layer in the non-display region is formed in the first annular groove;

the step S30 includes the following steps:

s302: forming alignment liquid films on the display area and the non-display area by the alignment liquid drops through an air knife, and enabling part of the alignment liquid films to be located in the first annular groove;

the step S302 includes the steps of:

s3021: the air knife comprises an inner air knife and an outer air knife, the inner air knife is positioned at the boundary of the display area, and the outer air knife is positioned at the inner side wall of the first annular groove;

s3022: uniformly moving the inner air knife and the outer air knife to the non-display area to enable the alignment liquid drops to be diffused to the first annular groove;

s3023: the outer air knife stops moving when moving to the outer side wall of the first annular groove, and the inner air knife continues to move to the outer side wall of the first annular groove;

s3024: and the inner air knife stops moving when moving to the outer side wall of the first annular groove, and the air knife equipment is closed after the alignment liquid drops are leveled.

2. The method of claim 1, wherein the color filter substrate has a display area and a non-display area at a periphery of the display area, the color filter substrate comprises a first substrate and a first alignment layer,

the first alignment layer is positioned in the display area and the non-display area of the color film substrate, and part of the first alignment layer positioned in the non-display area is arranged in the first annular groove;

and in the surface of the first alignment layer positioned on the outer side of the color film substrate, the surface positioned in the display area and the surface positioned in the non-display area are positioned on the same plane.

3. The method for manufacturing a color filter substrate according to claim 2, wherein the first substrate comprises a first substrate and a first conductive layer,

4. The method for manufacturing a color filter substrate according to claim 3, wherein the depth of the first annular groove is smaller than the thickness of the first conductive layer.

5. The method for manufacturing a color filter substrate according to claim 3, wherein a material for manufacturing the first conductive layer comprises at least one of indium tin oxide, indium zinc oxide, and zinc oxide.

6. The method of claim 2, wherein the color filter substrate comprises a first substrate and a black matrix layer,

7. The method for manufacturing a color filter substrate according to claim 2, wherein the depth of the first annular groove is greater than 0 nm and less than or equal to 100 nm, and the width of the first annular groove is greater than or equal to 10 microns and less than or equal to 100 microns.

8. The method for manufacturing a color film substrate according to claim 1, wherein the mass of the alignment liquid droplets dripped into the non-display area is 1.5 to 2 times that of the alignment liquid droplets dripped into the display area.