WO2022007195A1

WO2022007195A1 - Display panel, manufacturing method for display panel, and display device

Info

Publication number: WO2022007195A1
Application number: PCT/CN2020/116197
Authority: WO
Inventors: 黄建龙
Original assignee: 武汉华星光电技术有限公司
Priority date: 2020-07-09
Filing date: 2020-09-18
Publication date: 2022-01-13
Also published as: CN111766745A

Abstract

A display panel comprising an alignment plate. The alignment plate comprises a first area and a second area. The second area consists of a plurality of protrusions having a same height. The spacings among the protrusions are less than a predetermined threshold. The height of the first area is less than that of the protrusions of the second area. The first area corresponds to a blind hole of a substrate. The protrusions of the second area of the alignment plate squeeze out and take away a PI solution in an Anilox Roll groove, and the PI is evenly transfer-printed to the second area. Since the height of the first area corresponding to the blind hole is less than that of the second area and the first area would not squeeze out the PI solution in the Anitlox Roll groove and transfer-print same to the first area, the first area would not be coated or would be coated, as little as possible, with the PI, thereby solving the problems of a thick PI film in a blind hole area and low blind hole permeability caused by accumulation of a PI solution in the blind hole area because the PI solution is coated in the blind hole area in a full-coverage mode, thus improving the permeability of the blind hole area. Also provided are a manufacturing method for a display panel, and a display device.

Description

A display panel, a manufacturing method of the display panel, and a display device

technical field

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

Background technique

Display screen is the largest and most expensive component in electronic equipment, and display screen has always been the innovation of electronic equipment. In recent years, the material of the display screen has changed from thin film transistor liquid crystal display (Thin film transistor liquid crystal display) display, referred to as TFT-LCD for short) to organic light-emitting semiconductors (OrganicElectroluminesence Display, abbreviated as OLED) has developed, and the touch control method has also developed from external to internal control. With the rapid development of the display industry, the screen size not only tends to be larger, but also tends to have a high screen ratio. Various full-screen electronic devices have been born, and display devices with a high screen ratio have become With the current development trend, the development of smart terminal screens has been able to achieve a screen-to-body ratio of more than 90% of the full screen.

In the liquid crystal display panel industry, based on the structural design of the full screen, cameras, earpieces, sensors, etc. need to be installed in the panel display area by punching holes (such as blind holes). Blind hole technology can greatly increase the screen ratio. Because there is a camera under the blind hole area, the penetration rate is higher, and there are many factors affecting the penetration rate in this area, such as Array film structure, Color fiter (CF for short) film structure, Cell Gap, the thickness of the polyimide (Polyimide, PI for short) in the blind hole area, the thickness of the glass, etc. The liquid crystal display panel usually coats PI liquid on the thin film transistor substrate and the color filter substrate, and forms a pretilt angle by rubbing or photo-etching technology, so as to provide a bearing angle for the liquid crystal molecules. The PI liquid coating process in the prior art is mainly through the following methods: the PI liquid is evenly distributed on the alignment plate (APR Plate, abbreviated as APR), and then the PI liquid is transferred through the roller (Roller) to the alignment plate through the alignment plate. On the thin film transistor or color filter substrate, the alignment coating of the PI liquid is completed.

Among them, the thickness of the PI liquid above the Array&CF substrate has the greatest impact. How to reduce the thickness of the PI film in the blind hole area is the key to solving the penetration rate of the blind hole. At present, the PI liquid coating in the blind hole area adopts the full coverage mode. Since most of the TFT & CF film layers in the blind hole area are hollowed out, the PI liquid will accumulate in the hole area after coating, resulting in the hole area PI film than the AA area (Active Area, the effective display area) should be thick. As shown in Figure 1 and Figure 2, the PI liquid in the blind hole region has a thicker accumulation film than other regions. How to reduce the thickness of the PI film in the blind hole area is the key to solving the penetration rate.

technical problem

In the prior art, the PI liquid coating in the blind hole area is carried out in a full coverage mode. As shown in Figure 3, the PI liquid is accumulated in the blind hole area, resulting in a large thickness of the PI film in the blind hole area and a low penetration rate of the blind hole. , so that the display effect of the camera through the glass panel is insufficient, and an effective solution has not yet been proposed.

technical solutions

In view of this, embodiments of the present invention provide a display panel, a method for fabricating a display panel, and a display device, so as to solve the problem that the PI liquid coating in the blind hole area in the prior art adopts the full coverage mode for coating, and the PI liquid accumulates in the blind hole area. The hole area leads to the problem that the thickness of the PI film in the blind hole area is large and the penetration rate of the blind hole is low.

To this end, the embodiments of the present invention provide the following technical solutions:

A first aspect of the present invention provides a display panel, comprising:

an alignment plate; wherein the alignment plate includes a first area and a second area, the second area is composed of a plurality of protrusions with the same height; the spacing between the protrusions is smaller than a predetermined threshold; the first The height of the area is smaller than the height of the protrusions of the second area; the first area corresponds to the blind hole of the substrate.

Optionally, the first area is an opening.

Optionally, the edge of the first area is provided with a retaining wall, and the retaining wall is configured to block the polyimide liquid in the second area from flowing into the first area.

Optionally, the retaining wall is composed of a first sub-retaining wall, a second sub-retaining wall and a third sub-retaining wall, and the first sub-retaining wall, the second sub-retaining wall and the third sub-retaining wall enclose a first sub-retaining wall. an edge groove and a second edge groove, the depth of the second edge groove is smaller than the depth of the first edge groove; wherein the distance between the first edge groove and the center of the first region greater than the distance between the second edge groove and the center of the first region.

Optionally, the first area is a circular area.

In a second aspect of the present invention, a method for manufacturing a display panel is also provided, including:

providing a substrate on which blind holes are arranged;

provide an alignment plate;

The alignment plate is set into a first area and a second area, wherein the second area is composed of a plurality of protrusions with the same height; the spacing between the protrusions is smaller than a predetermined threshold; the first area The height of the second area is smaller than the height of the protrusion of the second area; the first area corresponds to the blind hole of the substrate.

Optionally, an opening is provided on the alignment plate, and the opening area is used as the first area.

Optionally, a blocking wall is arranged at the edge of the first area, and the blocking wall is arranged to block the polyimide liquid in the second area from flowing into the first area.

Optionally, a first sub-retaining wall, a second sub-retaining wall and a third sub-retaining wall are sequentially arranged along the center direction of the first area, and the first sub-retaining wall, the second sub-retaining wall and the third sub-retaining wall are arranged in sequence. The retaining wall surrounds a first edge groove and a second edge groove, and the depth of the second edge groove is smaller than the depth of the first edge groove; wherein, the first edge groove and the first edge groove The distance from the center of the area is greater than the distance between the second edge groove and the center of the first area.

In a third aspect of the present invention, a display device is further provided, including the display panel in the above-mentioned first aspect.

beneficial effect

The technical solution of the embodiment of the present invention has the following advantages:

Embodiments of the present invention provide a display panel, a method for fabricating a display panel, and a display device, wherein the display panel includes an alignment plate; wherein the alignment plate includes a first area and a second area, and the second area is composed of a plurality of protrusions with the same height. The distance between the protrusions is smaller than a predetermined threshold value; the height of the first area is smaller than the height of the protrusions in the second area; the first area corresponds to the blind hole of the substrate. The protrusions in the second area of the alignment plate will Anilox The PI liquid in the Roll groove is squeezed out and taken away, and the PI liquid is evenly transferred to the second area. Since the height of the first area corresponding to the blind hole is smaller than the height of the second area, the first area will not transfer the Anilox The PI liquid in the groove of the Roll is extruded and transferred to the first area. Therefore, the first area does not have or as little PI liquid as possible, which solves the problem that the blind hole area PI liquid coating in the prior art adopts the full coverage mode After coating, the PI liquid accumulates in the blind hole area, which leads to the problem that the thickness of the PI film in the blind hole area is large and the penetration rate of the blind hole is low, thereby improving the penetration rate of the blind hole area and improving the display of the organic light-emitting display panel. Effect.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of the structure of the PI film layer on the TFT side;

Figure 2 is a schematic diagram of the structure of the PI film layer on the CF side;

3 is a schematic diagram of the structure of an alignment plate in the prior art;

4 is a schematic structural diagram of an alignment plate according to an embodiment of the present invention;

5 is a schematic diagram of an alignment plate transfer PI coating method;

6 is a schematic structural diagram of an alignment plate according to an embodiment of the present invention;

7 is a schematic structural diagram of an alignment plate according to an embodiment of the present invention;

FIG. 8 is a flowchart of a method for fabricating a display panel according to an embodiment of the present invention.

Embodiments of the present invention

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. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation shown in the drawings Or the positional relationship is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as "first", "second" may expressly or implicitly include one or more features. In the description of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the present application. In the following description, details are set forth for the purpose of explanation. It is to be understood that one of ordinary skill in the art can realize that the present application may be practiced without the use of these specific details. In other instances, well-known structures and procedures have not been described in detail so as not to obscure the description of the present application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and features disclosed herein.

Wherein, the thickness of the film layer and the shape of the region in the accompanying drawings do not reflect the real scale, and the purpose is only to illustrate the content of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

According to an embodiment of the present invention, a display panel is provided, which is aimed at a full-screen and bezel-less display panel, and can of course also be applied to a common bezel or narrow bezel display panel. As long as the structure of the display panel needs to be provided with openings on the display panel, the structure in the present invention can be adopted. The specific structure of the display panel will be described in detail below.

In the display panel of the embodiment of the present invention, as shown in FIG. 4 , the alignment plate includes a first area and a second area, and the first area corresponds to the blind hole of the substrate. The first area is the circular area in Figure 4, the second area is the area outside the circular area, and the second area consists of multiple protrusions with the same height (as shown by multiple black dots in Figure 4) composition, the spacing of each protrusion is smaller than a predetermined threshold, and the height of the first region is smaller than the height of the protrusions in the second region.

Generally, a liquid crystal display panel includes an array substrate, a color filter substrate, and a liquid crystal layer sandwiched between the array substrate and the color filter substrate. A layer of PI, Polyimide liquid is coated on the surface of the above-mentioned substrates (for example, array substrates and color filter substrates), and a PI film is formed by baking at a high temperature, and then a friction process is performed on the PI film to generate the required PI film, to achieve the orientation of liquid crystal molecules. Therefore, the PI liquid coating (Coater) process of the color filter substrate and the array substrate is a very important one-step process. As shown in FIG. 5 , the coating principle is to coat the alignment material Polyimide (polyimide) by means of APR plate transfer. 1. Use pressure to drop the PI solution on the Anilox Roll through the Nozzle. 2. Doctor The Blade leveled the PI fluid on the Anilox Roll. 3. The round protrusions on the APR board squeeze the PI out of the groove of the Anilox Roll and take it away. 4. Uniformly transfer the PI on the APR board to the substrate to provide a liquid crystal alignment layer. That is, the main purpose of the PI (polyimide) process is to evenly coat a layer of alignment film on the glass substrate. At present, the main method used is printing plate printing. The specific process is that the PI liquid is dropped from the needle to the anilox roller, the mesh The anilox roller rotates at a certain speed, and the PI liquid on the surface of the anilox roller is scraped evenly by the scraper. The liquid is transferred to the APR plate. At this time, the platform carrying the glass substrate moves to the starting position of the APR plate printing, and then the PI liquid is transferred to the surface of the glass substrate after the APR plate is pressed and printed on the glass surface.

In the above-mentioned embodiment, the protrusion in the second area of the alignment plate squeezes out and takes away the PI liquid in the groove of the Anilox Roll, and transfers the PI liquid to the second area evenly. The height is less than the height of the second area, the first area will not be Anilox The PI liquid in the groove of the Roll is extruded and transferred to the first area. Therefore, the first area does not have or as little PI liquid as possible, which solves the problem that the blind hole area PI liquid coating in the prior art adopts the full coverage mode After coating, the PI liquid accumulates in the blind hole area, which leads to the problem that the thickness of the PI film in the blind hole area is large and the penetration rate of the blind hole is low, thereby improving the penetration rate of the blind hole area and improving the display of the organic light-emitting display panel. Effect.

In an optional embodiment, the material of the polyimide layer is photosensitive polyimide.

The above-mentioned blind hole area is an area for installing hardware. The hardware structure includes one or more of the following structures: front camera, start button, earpiece or speaker. The specific installation method of the hardware structure is not limited here. In the process of making the display panel, according to what product the display panel needs to make, it is determined where the hardware structure needs to be set, and the size and shape of the installation hole to be cut. When cutting the mounting holes, the shape of the cutting mounting holes is determined according to the hardware structure to be installed. For different hardware structures, different shapes of mounting holes can be set. Optionally, the cross-section of the mounting holes in the direction parallel to the substrate substrate The shape is one or more of the following: circle, oval, rectangle, trapezoid, diamond, or square.

Typically, the blind via is a via hole that connects the surface layer and the inner layer without penetrating the entire layout. Blind holes are located on the top and bottom surfaces of the printed circuit board, and have a certain depth, which is used for the connection between the surface layer circuit and the underlying inner layer circuit. The depth of the hole usually does not exceed a certain ratio (aperture diameter). The depth is not limited and depends on the actual situation.

In the existing design of in-plane blind holes, the in-plane blind hole design of the display device is to place a mobile phone camera under the blind hole. The blind holes penetrate the glass of the array substrate and all film layers except the buffer layer on the glass, and the blind holes also penetrate the color film layers and the black matrix of the color filter substrate.

In specific implementation, the present invention is mainly applicable to full-screen and borderless display panels, and is aimed at organic light-emitting semiconductors (Organic Electroluminescence Semiconductors). Display (abbreviated as OLED) display panel generally includes at least a base substrate, and a thin film transistor structure, an anode layer, a light-emitting layer, a cathode layer and an encapsulation layer sequentially arranged on the base substrate. In addition, some other film layers are also included, for example, a planarization layer, a passivation layer, etc., which are not limited herein. The thin film transistor layers are arranged on one side surface of the base substrate, and are used to control the light emission of the pixel region. Specifically, the thin film transistor layer includes a plurality of thin film transistors. Each thin film transistor includes a gate electrode formed on a base substrate, a gate insulating layer overlying the gate electrode, an active layer formed on the gate insulating layer, and a source electrode formed on the active layer and drain electrode. It can be understood that the above-mentioned thin film transistor is described by taking a bottom gate type as an example, and the present invention is not limited herein. In other embodiments, the thin film transistor may be a top gate type.

The substrate in this embodiment may be a flexible substrate, and the corresponding organic light-emitting display panel may be a flexible organic light-emitting display panel. The flexible organic light-emitting display panel has special effects such as low power consumption and bendability, and is suitable for various display devices, especially suitable for in wearable display devices. Optionally, the material of the flexible substrate is polyesterimide or polyethylene terephthalate resin. In addition, the substrate can also be a rigid substrate, and the corresponding organic light-emitting display panel is a rigid organic light-emitting display panel. In fact, this embodiment does not specifically limit the material of the organic light emitting display panel.

In an optional embodiment, the first area may be an opening, and the height of the opening must be such that the height of the first area is smaller than the height of the second area. The APR board in the blind hole area is optimized for hollow design, which cannot transfer PI liquid. The absence of PI film in the blind hole area can greatly improve the penetration rate of this area. Because there is no PI film in the blind hole area, there will be no PI wear. Improve the problem of broken bright spots in the blind hole area.

In an optional embodiment, the edge of the first region is provided with a retaining wall, and the retaining wall is configured to block the polyimide liquid in the second region from flowing into the first region. Specifically, the retaining wall is made of transparent resin or transparent curing glue, the transparent resin can be heat curing resin or light curing resin, and the transparent curing glue can be heat curing glue or light curing glue.

As shown in FIGS. 6 and 7 , in an optional embodiment, the above-mentioned retaining wall is composed of a first sub-retaining wall, a second sub-retaining wall and a third sub-retaining wall. The first sub-retaining wall, the second sub-retaining wall and the third sub-retaining wall are sequentially approached to the center of the first area. The first sub-retaining wall, the second sub-retaining wall and the third sub-retaining wall enclose the first edge groove (the deep hole 1 shown in Figure 7) and the second edge groove (the shallow hole shown in Figure 7) 2), the depth of the second edge groove is smaller than the depth of the first edge groove. A specific implementation manner in which the depth of the second edge groove is smaller than the depth of the first edge groove may be that the height of the first sub-retaining wall is greater than the height of the second sub-retaining wall, and the height of the second sub-retaining wall is greater than that of the third sub-retaining wall. The height of the retaining wall. The distance between the first edge groove and the center of the first area is greater than the distance between the second edge groove and the center of the first area, that is, the first edge groove is the outer ring of the first area, and the second edge groove is the outer ring of the first area. The groove is the inner ring of the first area. In this way, when a part of the PI liquid in the second area flows to the first area, it will first flow into the first edge groove, which prevents the PI liquid from further flowing to the first area, even if the second area flows more PI liquid to the first area. In some cases, the PI liquid overflows the first edge groove, and the second edge groove located in the first edge groove can further accommodate the PI liquid, preventing the PI liquid from further flowing to the first region. Meanwhile, the first sub-retaining wall is an external sub-retaining wall relative to the center of the first area, the third sub-retaining wall is an internal sub-retaining wall relative to the center of the first area, and the second sub-retaining wall is relative to the third sub-retaining wall. The center of an area is the sub-retaining wall located between the first sub-retaining wall and the third sub-retaining wall. The second sub-retaining wall and the third sub-retaining wall will not place the Anilox The PI liquid in the Roll groove is squeezed out, and the PI liquid will not be transferred to the first area. The edge of the blind hole area adopts the retaining wall design of deep and shallow holes (that is, the first edge groove and the second edge groove above), and the precision of the PI liquid during coating is better controlled to ensure that the PI liquid cannot flow into the blind hole area (that is, the first edge groove). area).

In an optional embodiment, the above-mentioned first area is a circular area.

An embodiment of the present invention also provides a method for manufacturing a display panel. FIG. 8 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention. As shown in FIG. 8 , the method includes the following steps:

Step S801: providing a substrate, and setting blind holes on the substrate;

Step S802: providing an alignment plate;

Step S803: Set the alignment plate into a first area and a second area, wherein the second area is composed of a plurality of protrusions with the same height; the distance between the protrusions is less than a predetermined threshold; The height is smaller than the height of the protrusion of the second area; the first area corresponds to the blind hole of the substrate.

As shown in Figure 5, the coating principle is to use the APR plate transfer method to coat the alignment material Polyimide (polyimide), including the following steps: 1. Use pressure to drop the PI liquid through the Nozzle on the Anilox Roll (anilox roll). )superior. 2. Doctor The Blade leveled the PI fluid on the Anilox Roll. 3. The round protrusions on the APR board squeeze the PI out of the groove of the Anilox Roll and take it away. 4. Uniformly transfer the PI on the APR board to the substrate to provide a liquid crystal alignment layer. In the above embodiment, the protrusion in the second area of the alignment plate will be Anilox The PI liquid in the Roll groove is squeezed out and taken away, and the PI liquid is evenly transferred to the second area. Since the height of the first area corresponding to the blind hole is smaller than the height of the second area, the first area will not transfer the Anilox The PI liquid in the groove of the Roll is extruded and transferred to the first area. Therefore, the first area does not have or as little PI liquid as possible, which solves the problem that the blind hole area PI liquid coating in the prior art adopts the full coverage mode After coating, the PI liquid accumulates in the blind hole area, which leads to the problem that the thickness of the PI film in the blind hole area is large and the penetration rate of the blind hole is low, thereby improving the penetration rate of the blind hole area and improving the display of the organic light-emitting display panel. Effect.

Optionally, an opening is provided on the alignment plate, and the opening area is used as the first area. The height of the opening must be such that the height of the first region is smaller than the height of the second region. The APR board in the blind hole area is optimized for hollow design, which cannot transfer PI liquid. The absence of PI film in the blind hole area can greatly improve the penetration rate of this area. Because there is no PI film in the blind hole area, there will be no PI wear. Improve the problem of broken bright spots in the blind hole area.

As shown in FIGS. 6 and 7 , in an optional embodiment, the above-mentioned retaining wall is composed of a first sub-retaining wall, a second sub-retaining wall and a third sub-retaining wall. The first sub-retaining wall, the second sub-retaining wall and the third sub-retaining wall are sequentially approached to the center of the first area. The first sub-retaining wall, the second sub-retaining wall and the third sub-retaining wall enclose the first edge groove (the deep hole shown in Figure 7) and the second edge groove (the shallow hole shown in Figure 7) , the depth of the second edge groove is smaller than the depth of the first edge groove. A specific implementation manner in which the depth of the second edge groove is smaller than the depth of the first edge groove may be that the height of the first sub-retaining wall is greater than the height of the second sub-retaining wall, and the height of the second sub-retaining wall is greater than that of the third sub-retaining wall. The height of the retaining wall. The distance between the first edge groove and the center of the first area is greater than the distance between the second edge groove and the center of the first area, that is, the first edge groove is the outer ring of the first area, and the second edge groove is the outer ring of the first area. The groove is the inner ring of the first area. In this way, when a part of the PI liquid in the second area flows to the first area, it will first flow into the first edge groove, which prevents the PI liquid from further flowing to the first area, even if the second area flows more PI liquid to the first area. In some cases, the PI liquid overflows the first edge groove, and the second edge groove located in the first edge groove can further accommodate the PI liquid, preventing the PI liquid from further flowing to the first region. Meanwhile, the first sub-retaining wall is an external sub-retaining wall relative to the center of the first area, the third sub-retaining wall is an internal sub-retaining wall relative to the center of the first area, and the second sub-retaining wall is relative to the third sub-retaining wall. The center of an area is the sub-retaining wall located between the first sub-retaining wall and the third sub-retaining wall. The second sub-retaining wall and the third sub-retaining wall will not place the Anilox The PI liquid in the Roll groove is squeezed out, and the PI liquid will not be transferred to the first area. The edge of the blind hole area adopts the retaining wall design of deep and shallow holes (that is, the first edge groove and the second edge groove above), and the precision of the PI liquid during coating is better controlled to ensure that the PI liquid cannot flow into the blind hole area (that is, the first edge groove). area).

An embodiment of the present invention further provides a display device, including the display panel in any of the foregoing embodiments. Taking a mobile phone as a display device as an example, the display device is not limited to a mobile phone. Specifically, the display device may include but not be limited to a personal computer (Personal computer). Computer, referred to as PC), Personal Digital Assistant (Personal Digital Assistant, referred to as PDA), wireless handheld devices, tablet computers (Tablet Computer), MP4 player or TV and any electronic device with display function.

To sum up, the alignment plate is set into a first area and a second area, the height of the first area is smaller than the height of the second area, the first area corresponds to the blind hole area of the substrate, and the protrusions in the second area of the alignment plate Anilox The PI liquid in the Roll groove is squeezed out and taken away, and the PI liquid is evenly transferred to the second area. Since the height of the first area corresponding to the blind hole is smaller than the height of the second area, the first area will not transfer the Anilox The PI liquid in the groove of the Roll is extruded and transferred to the first area. Therefore, the first area does not have or as little PI liquid as possible, which solves the problem that the blind hole area PI liquid coating in the prior art adopts the full coverage mode After coating, the PI liquid accumulates in the blind hole area, which leads to the problem that the thickness of the PI film in the blind hole area is large and the penetration rate of the blind hole is low, thereby improving the penetration rate of the blind hole area and improving the display of the organic light-emitting display panel. Effect.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present invention, such modifications and variations falling within the scope of the appended claims within the limited range.

Claims

A display panel, comprising:

an alignment plate; wherein the alignment plate includes a first area and a second area, the second area is composed of a plurality of protrusions with the same height; the spacing between the protrusions is smaller than a predetermined threshold; the first The height of the area is smaller than the height of the protrusions of the second area; the first area corresponds to the blind hole of the substrate.
The display panel of claim 1, wherein the first area is an opening.
The display panel according to claim 1, wherein the edge of the first area is provided with a blocking wall, and the blocking wall is set to block the polyimide liquid in the second area from flowing into the first area.
The display panel of claim 3, wherein the retaining wall is composed of a first sub-retaining wall, a second sub-retaining wall and a third sub-retaining wall, the first sub-retaining wall, the second sub-retaining wall and the The third sub-retaining wall encloses a first edge groove and a second edge groove, and the depth of the second edge groove is smaller than that of the first edge groove; The distance from the center of the first area is greater than the distance between the second edge groove and the center of the first area.
The display panel according to any one of claims 1 to 4, wherein the first area is a circular area.
A manufacturing method of a display panel, comprising:

providing a substrate on which blind holes are arranged;

provide an alignment plate;

The alignment plate is set into a first area and a second area, wherein the second area is composed of a plurality of protrusions with the same height; the spacing between the protrusions is smaller than a predetermined threshold; the first area The height of the second area is smaller than the height of the protrusion of the second area; the first area corresponds to the blind hole of the substrate.
The manufacturing method of the display panel according to claim 6, wherein an opening is provided on the alignment plate, and the opening area is used as the first area.
The method for manufacturing a display panel according to claim 6, wherein a barrier wall is arranged at the edge of the first area, and the barrier wall is arranged to block the polyimide liquid in the second area from flowing into the first area area.
The method for manufacturing a display panel according to claim 8, wherein a first sub-retaining wall, a second sub-retaining wall and a third sub-retaining wall are arranged in sequence along the center direction of the first area, the first sub-retaining wall The wall, the second sub-retaining wall and the third sub-retaining wall enclose a first edge groove and a second edge groove, and the depth of the second edge groove is smaller than the depth of the first edge groove; wherein, the The distance between the first edge groove and the center of the first area is greater than the distance between the second edge groove and the center of the first area.
A display device comprising the display panel of claims 1 to 5.