WO2021077490A1

WO2021077490A1 - Display panel and preparation method therefor, and display apparatus

Info

Publication number: WO2021077490A1
Application number: PCT/CN2019/118178
Authority: WO
Inventors: 朱清永
Original assignee: Tcl华星光电技术有限公司
Priority date: 2019-10-22
Filing date: 2019-11-13
Publication date: 2021-04-29
Also published as: CN110824781A

Abstract

Disclosed in the embodiments of the present invention are a display panel and a preparation method therefor, and a display apparatus, the embodiments of the present invention being distinguished from the prior art in that the present application addresses the defects of products in which colour filter layers and spacers thereof are integrated on an array substrate, making it more difficult for water and oxygen to enter a display panel via an alignment film layer by means of arranging a barrier wall on the alignment film layer positioned in a non-display area, and thereby effectively increasing the stability of the display panel.

Description

Display panel and preparation method thereof, and display device

Technical field

The present invention relates to the field of display technology, in particular to a display panel, a preparation method thereof, and a display device.

Background technique

Thin Film Transistor (TFT) is the current liquid crystal display device (Liquid Crystal Display, LCD) and active matrix organic light-emitting display device (Active Matrix Organic Light-Emitting The main driving components in Diode (AMOLED) are directly related to the display performance of the flat panel display device.

Most of the existing liquid crystal displays on the market are backlit liquid crystal displays, which include liquid crystal display panels and backlight modules (backlight module). The working principle of the liquid crystal display panel is based on the thin film transistor array substrate (Thin Film Transistor Array Substrate, TFT Array Substrate) and the color filter (Color Filter, CF) substrate are filled with liquid crystal molecules, and the pixel voltage and common voltage are applied to the two substrates respectively, and the electric field formed between the pixel voltage and the common voltage controls the liquid crystal molecules Rotate the direction to transmit the light of the backlight module to produce a picture. The LCD panel molding process generally includes: the front-end array process (thin film, yellow light, etching and stripping), the middle-stage cell process (the bonding of the TFT substrate and the CF substrate), and the back-end module assembly process (The driver IC is pressed against the printed circuit board). Among them, the front Array process is mainly to form TFT substrates to control the movement of liquid crystal molecules; the middle cell process is mainly to add liquid crystal between the TFT substrate and the CF substrate; the back module assembly process is mainly to drive IC pressing and printed circuits The integration of the board drives the rotation of the liquid crystal molecules to display images.

technical problem

At present, COA (Color Filter on Array) + POA (PS on Array) technology has emerged. This technology integrates the color resist layer and spacers on the color filter substrate on the array substrate, making the original color filter substrate structure single, and With the development of display devices, the requirements for the borders of display devices are getting narrower and narrower, especially in commercial displays, where larger display screens are needed, and the screens are spliced into display walls, which requires the distance between the screen and the screen to be as small as possible , So the frame needs to be narrower. At present, most LCD displays use polyimide (PI) as the liquid crystal alignment film, and the PI film will have a part of outflow during the coating process. As the frame becomes narrower, the outflow of PI and sealant will form Overlap, and if the PI flows out of the sealant, for products such as COA (Color Filter on Array) + POA (PS on Array), due to the water absorption of PI, it is more likely that the display device will display poorly in a high-humidity environment.

Technical solutions

The embodiment of the present invention provides a display panel, a manufacturing method thereof, and a display device. The present application addresses the shortcomings of the product in which the color filter layer and its spacers are integrated on the array substrate, through the alignment film layer located in the non-display area The retaining wall is provided to make it more difficult for water and oxygen to enter the display panel through the alignment film layer, thereby effectively improving the stability of the display panel.

In order to solve the above problems, in the first aspect, the present application provides a display panel, the display panel includes a non-display area, and the display panel includes:

Color film substrate;

The alignment film layer is formed on the color filter substrate;

Wherein, the alignment film layer located in the non-display area is provided with a retaining wall, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.

Further, the display panel includes an array substrate and sealant;

The array substrate and the color filter substrate are arranged opposite to each other;

The sealant connects the color filter substrate and the array substrate;

The frame glue and the retaining wall are integrally formed.

Further, the retaining wall includes at least two sub-retaining walls distributed at intervals.

Further, the width of the sub-retaining wall ranges from 50-200um.

In a second aspect, the present application provides a display device, the display device includes a display panel, the display panel includes a non-display area, and the display panel includes:

Color film substrate;

The alignment film layer is formed on the color filter substrate;

Further, the display panel further includes an array substrate and sealant;

The sealant connects the color filter substrate and the array substrate;

The frame glue and the retaining wall are integrally formed.

Further, the width of the sub-retaining wall ranges from 50-200um.

In a third aspect, the present application provides a method for manufacturing a display panel, the display panel including a non-display area, and the method includes:

Provide color film substrate;

Preparing an alignment film layer on the color filter substrate;

A retaining wall is prepared on the alignment film layer located in the non-display area, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.

Further, the preparing an alignment film layer on the color filter substrate includes:

Preparing a common electrode layer on the color filter substrate;

An alignment film layer is prepared on the common electrode layer.

Further, the preparation of a retaining wall on the alignment film layer located in the non-display area, the water permeability of the retaining wall being lower than the water permeability of the alignment film layer, includes:

Patterning the alignment film layer by a laser laser process to form via holes on the alignment film layer located in the non-display area;

A retaining wall is prepared in the via hole, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.

Further, the patterning of the alignment film layer by a laser laser process to form a via hole on the alignment film layer located in the non-display area includes:

The alignment film layer is patterned by a laser laser process to form via holes extending in a curved direction on the alignment film layer located in the non-display area.

Further, the patterning of the alignment film layer by a laser laser process includes:

The alignment film layer and the common electrode layer located in the non-display area are simultaneously patterned by a laser laser process to form via holes on the alignment film layer located in the non-display area.

Beneficial effect

In the embodiment of the present invention, a display panel is provided, the display panel includes a non-display area, the display panel includes: a color filter substrate; an alignment film layer formed on the color filter substrate; wherein the alignment film layer located in the non-display area A retaining wall is provided, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer, which is different from the prior art. The present application addresses the shortcomings of the color filter layer and its spacers integrated on the array substrate. The alignment film layer in the non-display area is provided with a retaining wall, which makes it more difficult for water and oxygen to enter the display panel through the alignment film layer, thereby effectively improving the stability of the display panel.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of an embodiment of a display panel provided by an embodiment of the present invention;

2 is a schematic structural diagram of another embodiment of a display panel provided by an embodiment of the present invention;

3 is a schematic flowchart of an embodiment of a method for manufacturing a display panel provided by an embodiment of the present invention;

4 is a schematic diagram of another embodiment of a method for manufacturing a display panel provided by an embodiment of the present invention;

FIG. 5 is a schematic flowchart of another embodiment of a method for manufacturing a display panel provided by an embodiment of the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, and “outer” are based on the orientation shown in the drawings The or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more than two, unless otherwise specifically defined.

At present, COA (Color Filter on Array) + POA (PS on Array) technology has emerged. This technology integrates the color resist layer and spacers on the color filter substrate on the array substrate, making the original color filter substrate structure single, and With the development of display devices, the requirements for the borders of display devices are getting narrower and narrower, especially in commercial displays, where larger display screens are needed, and the screens are spliced into display walls. This requires the distance between the screen and the screen to be as small as possible. , So the frame needs to be narrower. At present, most LCD displays use polyimide (PI) as the liquid crystal alignment film, and the PI film will have a part of outflow during the coating process. As the frame becomes narrower, the outflow of PI and sealant will form Overlap, and if the PI flows out of the sealant, for products such as COA (Color Filter on Array) + POA (PS on Array), due to the water absorption of PI, it is more likely that the display device will display poorly in a high-humidity environment.

Based on this, embodiments of the present invention provide a display panel, a manufacturing method thereof, and a display device, which will be described in detail below.

First, an embodiment of the present invention provides a display panel, the display panel includes a non-display area, the display panel includes: a color filter substrate; an alignment film layer formed on the color filter substrate; wherein the alignment film located in the non-display area The layer is provided with a retaining wall, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.

Please refer to FIG. 1, which is a schematic structural diagram of an embodiment of a display panel in an embodiment of the present invention. The display panel 10 includes a non-display area 100 and a display area 101. The display area 101 of the display panel is used to display pixels. The screen, in the area corresponding to the display area 101, also includes an array substrate and a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate. The non-display area 101 of the display panel corresponds to the area of the sealant 106 where the array substrate and the color filter substrate are connected. The display panel includes: a color filter substrate 102; an alignment film layer 103 formed on the color filter substrate; wherein, it is located in the non-display area 100 The alignment film layer 103 is provided with a retaining wall 104. The water permeability of the retaining wall 104 is lower than that of the alignment film layer 103. In order to achieve a better display effect, the display area 101 is provided with alignment films on the upper and lower layers of the liquid crystal layer. Layer 103, the alignment film layer 103 can provide a pretilt angle for the liquid crystal molecules in the liquid crystal layer, so that the liquid crystal molecules can be more effectively deflected when receiving a deflection signal. The alignment film layer 103 can be made of polyimide Polyimide has a certain degree of water absorption. In order to prevent the alignment film layer 103 from absorbing water vapor, which will cause the internal components of the panel to be corroded, the alignment film layer 103 can be provided with a retaining wall 104. The waterproofness of the material used for the retaining wall 104 It is higher than the alignment film layer 103.

Different from the prior art, the present application addresses the shortcomings of the product in which the color filter layer and its spacers are integrated on the array substrate. The alignment film layer 103 located in the non-display area 100 is provided with a retaining wall 104 to make water and oxygen It is more difficult to enter the display panel through the alignment film layer 103, thereby effectively improving the stability of the display panel.

Please refer to FIG. 1 and FIG. 2. FIG. 2 is a schematic structural diagram of another embodiment of a display panel provided by an embodiment of the present invention.

In a preferred embodiment, the display panel further includes an array substrate 105 and a sealant 106, wherein the color resist layer is integrated on the array substrate; the array substrate is arranged opposite to the color filter substrate; the sealant 106 connects the color filter substrate and the array substrate The frame glue 106 and the retaining wall 104 are integrally formed. Specifically, in the color film substrate manufacturing process, when the alignment film layer 103 is prepared, a via hole is formed on the alignment film layer 103, and when the frame rubber 106 is prepared, the frame glue 106 The via holes are filled, so that a retaining wall 104 is formed between the alignment film layer 103. Compared with the alignment film layer 103, the sealant 106 has a higher sealing performance and a lower water permeability.

Further, in this embodiment, the retaining wall 104 includes at least two sub-retaining walls 1041 distributed at intervals. Specifically, a plurality of via holes are opened in the alignment film layer 103, and sealant is filled in the plurality of via holes. 106. Form a plurality of sub-retaining walls 104 distributed at intervals. For example, four sub-retaining walls 104 may be formed. The number of sub-retaining walls 104 is not limited in this application, and it depends on the actual situation. The width of the sub-retaining walls 104 is 50 -200um, specifically, when opening the via hole in the alignment film layer 103, the width of the via hole is set to 50-200um, and the sealant 106 is filled in the via hole to form a sub-retaining wall with a width in the range of 50-200um 104. For example, the width of the sub-retaining wall 104 can be set to 100um. This application does not limit the width of the sub-retaining wall 104, and it depends on the actual situation. When the width of the retaining wall 104 is moderate, the preparation complexity can be reduced. Sex, and at the same time can play a better role in isolating water vapor.

In order to better implement the display panel in the embodiment of the present invention, on the basis of the display panel, the embodiment of the present invention also provides a display device, and the display device includes the display panel described in the foregoing embodiment.

Compared with the conventional display device, the display device provided by the embodiment of the present invention includes the display panel described in the above-mentioned embodiment, the display panel includes a non-display area 100, and the display panel includes: a color film substrate The alignment film layer 103 is formed on the color filter substrate; wherein, the alignment film layer 103 located in the non-display area 100 is provided with a retaining wall 104, and the water permeability of the retaining wall 104 is lower than that of the alignment film layer 103, which is different from In the prior art, the present application addresses the shortcomings of the product in which the color filter layer and its spacers are integrated on the array substrate. The alignment film layer 103 located in the non-display area 100 is provided with a retaining wall 104 to make water and oxygen more difficult. The alignment film layer 103 enters the display panel, thereby effectively improving the stability of the display panel.

In order to better implement the display panel in the embodiment of the present invention, on the basis of the display panel, the embodiment of the present invention also provides a method for manufacturing a display panel. The display panel includes a non-display area 100. The method includes: providing a color film substrate Prepare the alignment film layer 103 on the color filter substrate; prepare the retaining wall 104 on the alignment film layer 103 located in the non-display area 100, and the water permeability of the retaining wall 104 is lower than that of the alignment film layer 103.

Please refer to FIG. 3. FIG. 3 is a schematic diagram of an embodiment of a method for manufacturing a display panel according to an embodiment of the present invention. The display panel includes a non-display area 100, and the method includes:

201. Provide a color film substrate.

In this embodiment, the color resist layer and spacers in the provided color filter substrate may be integrated on the array substrate, and the color filter substrate mainly includes a black matrix layer.

202. Prepare an alignment film layer on the color filter substrate.

In this embodiment, the polyimide material is coated on the color filter substrate, and the alignment film layer 103 is prepared through the steps of patterning and curing.

203. Prepare a retaining wall on the alignment film layer located in the non-display area, and the water permeability of the retaining wall is lower than that of the alignment film layer.

In this embodiment, a via hole is prepared on the alignment film layer 103 located in the non-display area 100, and the via hole is filled with a material with a lower water permeability than the alignment film layer 103 to form a retaining wall 104 in the via hole.

In the embodiment of the present invention, a method for preparing a display panel is provided. Compared with the traditional preparation process, the alignment film needs to be opened and the holes are filled with waterproof materials. The retaining wall 104 has been prepared, and the retaining wall 104 can effectively Prevent water vapor from entering the inside of the display panel through the alignment film 103, thereby effectively reducing the probability of the display panel being corroded, and improving the stability of the display panel.

On the basis of the foregoing embodiment, in another specific embodiment of the present application, preparing the alignment film layer 103 on the color filter substrate includes: preparing a common electrode layer on the color filter substrate; preparing an alignment film on the common electrode layer层103.

Please refer to FIG. 4, which is a schematic diagram of another embodiment of a method for manufacturing a display panel according to an embodiment of the present invention, in which, preparing an alignment film layer 103 on a color filter substrate includes:

301. Prepare a common electrode layer on a color filter substrate.

In this embodiment, a metal layer is sputtered on the color filter substrate to prepare a common electrode layer.

302. Prepare an alignment film layer on the common electrode layer.

In this embodiment, an alignment film layer 103 is prepared on the common electrode layer, and the alignment film is located between the liquid crystal layer and the common electrode layer.

On the basis of the foregoing embodiment, in another specific embodiment of the present application, a retaining wall 104 is prepared on the alignment film layer 103 located in the non-display area 100, and the water permeability of the retaining wall 104 is lower than that of the alignment film layer 103 The water permeability includes: patterning the alignment film layer 103 by a laser laser process to form a via hole on the alignment film layer 103 located in the non-display area 100; preparing a retaining wall 104 in the via hole, and the water permeability of the retaining wall 104 The water permeability is lower than the water permeability of the alignment film layer 103.

Please refer to FIG. 5, which is a schematic diagram of another embodiment of a method for manufacturing a display panel according to an embodiment of the present invention, in which a retaining wall 104 is prepared on the alignment film layer 103 located in the non-display area 100. The water permeability is lower than that of the alignment film 103, including:

401. Pattern the alignment film layer by a laser laser process to form via holes on the alignment film layer located in the non-display area.

Specifically, in this embodiment, a laser laser process is used to laser the alignment film layer 103 to remove the alignment film layer 103 material located on the alignment film layer 103 in the non-display area 100 to prepare via holes.

402. Prepare a retaining wall in the via hole, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.

In this embodiment, the waterproof material is filled in the above-mentioned via hole to prepare the retaining wall 104 in the via hole.

On the basis of the foregoing embodiment, in a specific embodiment of the present application, the alignment film layer 103 is patterned by a laser laser process to form via holes on the alignment film layer 103 located in the non-display area 100, including :

The alignment film layer 103 is patterned by a laser laser process to form via holes extending in a curved direction on the alignment film layer 103 located in the non-display area 100.

In this embodiment, for the rounded corner display panel, which conforms to the rounded corner display panel process, the alignment film 103 is patterned by a laser process. The patterning is set according to the rounded corner model. The accuracy of the alignment film is difficult to control, so the alignment film layer 103 at the rounded corners can easily flow out and contact the outside. Therefore, it is more necessary to prepare a retaining wall 104 between the alignment films at the corresponding rounded corners.

In a specific embodiment, in step 302, a rectangular alignment film layer 103 may be directly prepared on the common electrode layer. In step 401, the corners of the alignment film 103 are chamfered by a laser laser process to obtain an alignment film with rounded corners. Therefore, the coating of the alignment film layer only requires a standard rectangular coating, which can simplify the alignment film layer coating process of the round-corner display panel.

In a specific embodiment, in step 402, after forming the via hole, when preparing the sealant, the via hole may be filled with the sealant, and the barrier wall can be prepared by using the sealant as a material.

In this embodiment, patterning the alignment film layer 103 by a laser laser process includes:

The alignment film layer 103 and the common electrode layer located in the non-display area 100 are simultaneously patterned by a laser laser process to form via holes on the alignment film layer 103 located in the non-display area 100.

In this embodiment, in combination with the color film substrate preparation process, the common electrode process and the barrier 104 process can be combined. Specifically, a metal layer is sputtered on the color film substrate to form a metal layer, and then, coating on the metal layer After the polyimide material is cured, the alignment film layer 103 and the common electrode layer located in the non-display area 100 are patterned simultaneously by a laser laser process, so that the alignment film layer 103 and the common electrode layer located in the non-display area 100 are patterned at the same time. Via holes are formed on the alignment film layer 103. This method saves new equipment costs and effectively solves the problem that the display panel is easily corroded due to the water absorption of the alignment film.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For a part that is not described in detail in an embodiment, please refer to the detailed description in other embodiments above, and will not be repeated here.

In specific implementation, each of the above units or structures can be implemented as independent entities, or can be combined arbitrarily, and implemented as the same or several entities. For the specific implementation of each of the above units or structures, please refer to the previous method embodiments. No longer.

For the specific implementation of each of the above operations, refer to the previous embodiment, which will not be repeated here.

The above has described in detail a display panel, a manufacturing method thereof, and a display device provided by the embodiments of the present invention. Specific examples are used in this article to explain the principles and implementations of the present invention. The description of the above embodiments is only for To help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and the scope of application. In summary, the content of this specification should not be understood To limit the present invention.

Claims

A display panel, wherein the display panel includes a non-display area, and the display panel includes:

Color film substrate;

The alignment film layer is formed on the color filter substrate;

Wherein, the alignment film layer located in the non-display area is provided with a retaining wall, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.
The display panel according to claim 1, wherein the display panel further comprises an array substrate and sealant;

The array substrate and the color filter substrate are arranged opposite to each other;

The sealant connects the color filter substrate and the array substrate;

The frame glue and the retaining wall are integrally formed.
The display panel according to claim 1, wherein the retaining wall comprises at least two sub-retaining walls distributed at intervals.
The display panel according to claim 3, wherein the width of the sub-blocking wall is in the range of 50-200um.
A display device, wherein the display device includes a display panel, the display panel includes a non-display area, and the display panel includes:

Color film substrate;

The alignment film layer is formed on the color filter substrate;

Wherein, the alignment film layer located in the non-display area is provided with a retaining wall, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.
The display device according to claim 5, wherein the display panel further comprises an array substrate and sealant;

The array substrate and the color filter substrate are arranged opposite to each other;

The sealant connects the color filter substrate and the array substrate;

The frame glue and the retaining wall are integrally formed.
The display device according to claim 5, wherein the retaining wall comprises at least two sub-retaining walls spaced apart.
8. The display device according to claim 7, wherein the width of the sub-blocking wall is in the range of 50-200um.
A method for manufacturing a display panel, wherein the display panel includes a non-display area, and the method includes:

Provide color film substrate;

Preparing an alignment film layer on the color filter substrate;

A retaining wall is prepared on the alignment film layer located in the non-display area, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.
9. The method for manufacturing a display panel according to claim 9, wherein the preparing an alignment film layer on the color filter substrate comprises:

Preparing a common electrode layer on the color filter substrate;

An alignment film layer is prepared on the common electrode layer.
The method for manufacturing a display panel according to claim 10, wherein the retaining wall is prepared on the alignment film layer located in the non-display area, and the water permeability of the retaining wall is lower than that of the alignment film layer. The water permeability includes:

Patterning the alignment film layer by a laser laser process to form via holes on the alignment film layer located in the non-display area;

A retaining wall is prepared in the via hole, and the water permeability of the retaining wall is lower than the water permeability of the alignment film layer.
11. The method for manufacturing a display panel according to claim 11, wherein the alignment film layer is patterned by a laser laser process to form a via hole on the alignment film layer located in the non-display area ,include:

The alignment film layer is patterned by a laser laser process to form via holes extending in a curved direction on the alignment film layer located in the non-display area.
11. The method for manufacturing a display panel according to claim 11, wherein the patterning the alignment film layer by a laser laser process comprises:

The alignment film layer and the common electrode layer located in the non-display area are simultaneously patterned by a laser laser process to form via holes on the alignment film layer located in the non-display area.