WO2020215513A1

WO2020215513A1 - Display panel and manufacturing method therefor

Info

Publication number: WO2020215513A1
Application number: PCT/CN2019/098196
Authority: WO
Inventors: 何昆鹏; 张晓星
Original assignee: 深圳市华星光电半导体显示技术有限公司
Priority date: 2019-04-24
Filing date: 2019-07-29
Publication date: 2020-10-29
Also published as: CN110047894A

Abstract

Provided are a display panel and a manufacturing method therefor. The display panel comprises: an array substrate, and a padding layer, a pixel definition layer and a pixel layer, which are arranged on the array substrate in sequence, wherein the pixel layer comprises a plurality of sub-pixels in different colors; the pixel definition layer comprises a plurality of pixel definition portions; the pixel definition portions are provided between two corresponding adjacent sub-pixels and used for blocking the two adjacent sub-pixels; and the padding layer comprises a plurality of padding portions, and the padding portions are provided between the corresponding pixel definition portions and the array substrate.

Description

Display panel and manufacturing method thereof

Technical field

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

Background technique

AMOLED(Active Matrix Organic Light Emitting Diode (Active Matrix Organic Light Emitting Diode) has the characteristics of fast response, high contrast, wide viewing angle, high luminous rate, wide color gamut, and self-luminescence compared with traditional liquid crystal panels. It has good application prospects.

In the prior art, as shown in FIG. 6, an AMOLED display panel 200 includes an array substrate 201, a plurality of sub-pixels 202, and a pixel definition layer 203. The adjacent sub-pixels 202 are made of inks of different colors, and the pixel definition layer 203 is used for Separate adjacent sub-pixels 202 to avoid color mixing between inks of different colors when making sub-pixels. However, the thickness of the light-emitting layer of the AMOLED is small. In order to facilitate the overlap of the light-emitting layer device and the cathode, the thickness of the pixel definition layer is generally small. Therefore, for inks of different colors, there is still a greater risk of color mixing.

Therefore, it is necessary to provide a display panel to solve the problem of overflow and color mixing between AMOLED inks of different colors in the prior art.

technical problem

The purpose of the present invention is to provide a display panel and a manufacturing method thereof. A spacer layer is provided to raise the pixel definition part, further isolate sub-pixels of different colors, and solve the overflow that exists between the inks of different colors of AMOLED in the prior art. And the problem of color mixing.

Technical solutions

To solve the above problems, the technical solution provided by the present invention is as follows:

An embodiment of the present invention provides a display panel, including: an array substrate, a spacer layer disposed on the array substrate, a pixel definition layer disposed on the spacer layer, and pixels disposed on the pixel definition layer Floor;

The pixel layer includes a plurality of sub-pixels of different colors;

The pixel definition layer includes a plurality of pixel definition parts, the pixel definition parts are arranged between two corresponding adjacent sub-pixels, and the pixel definition parts are used to block the two adjacent sub-pixels;

The padding layer includes a plurality of padding portions, the padding portion is disposed between the corresponding pixel defining portion and the array substrate, and the padding portion is used to heighten the pixel defining portion;

The constituent material of the cushion layer is a hydrophilic material, and the constituent material of the pixel defining layer is a hydrophobic material.

In an embodiment, the pixel defining part includes a first pixel defining part, the first pixel defining part is arranged between sub-pixels of different colors, and the padding part is arranged on the first pixel defining part and Between the array substrates.

In one embodiment, the constituent material of the gasket layer is a hydrophilic material.

In an embodiment, the constituent material of the pixel definition layer is a hydrophobic material.

In an embodiment, the height of the pad part is smaller than the height of the corresponding pixel defining part.

In an embodiment, the display panel further includes an anode layer disposed between the array substrate and the gasket layer.

In an embodiment, the constituent material of the anode layer is a reflective material or a transmissive material.

In an embodiment, the cross-sectional figure of the pixel defining portion is a trapezoid, and the length of the upper base of the trapezoid is smaller than the length of the lower base.

In an embodiment, the cross-sectional pattern of the padding portion is a trapezoid, the length of the upper base of the trapezoid is less than the length of the lower base, and the length of the upper base of the padding portion is greater than or equal to the corresponding pixel definition The length of the bottom side of the part.

An embodiment of the present invention provides another display panel, including: an array substrate, a spacer layer disposed on the array substrate, a pixel definition layer disposed on the spacer layer, and a pixel definition layer disposed on the pixel definition layer. Pixel layer

The pixel layer includes a plurality of sub-pixels of different colors;

The padding layer includes a plurality of padding portions, the padding portions are disposed between the corresponding pixel defining portion and the array substrate, and the padding portion is used to elevate the pixel defining portion.

The embodiment of the present invention also provides a manufacturing method of a display panel, including:

Provide an array substrate;

Forming a spacer layer on the array substrate, the spacer layer including a plurality of spacer parts;

A pixel definition layer is formed on the spacer layer, the pixel definition layer includes a plurality of pixel definition parts, wherein the pixel definition parts are arranged on the corresponding spacer parts, and the spacer parts are used to raise the Pixel definition department;

A pixel layer is formed on the pixel definition layer, the pixel layer includes a plurality of sub-pixels of different colors, wherein the pixel definition part is arranged between two corresponding adjacent sub-pixels, and the pixel definition part is used for blocking The two adjacent sub-pixels.

Beneficial effect

The present invention provides a display panel and a manufacturing method thereof. The display panel is provided with a gasket layer, wherein the gasket layer is provided between an array substrate and a pixel definition layer, and is used to raise the pixel definition layer to ensure different colors. There is no color mixing and overflow between the inks, which can improve the yield of the display panel.

Description of the drawings

The present invention will be further described with the accompanying drawings. It should be noted that the drawings in the following description are only used to explain some embodiments of the present invention. For those skilled in the art, without creative work, other drawings can be obtained based on these drawings. Attached.

FIG. 1 is a schematic top view of a display panel provided by an embodiment of the present invention.

2 is a schematic cross-sectional view of a display panel provided by an embodiment of the invention.

FIG. 3 is another schematic top view of a display panel provided by an embodiment of the present invention.

4 is another schematic cross-sectional view of the display panel provided by the embodiment of the present invention.

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

FIG. 6 is a schematic cross-sectional view of a conventional display panel.

Embodiments of the invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the 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 orientation or positional relationship indicated by the terms "upper", "lower", "side", etc. are based on the orientation or positional relationship shown in the drawings, where "upper" is only a superficial Above an object, specifically refers to directly above, obliquely above, or upper surface, as long as it is above the level of the object, while "surface" refers to two objects in direct contact with each other. The upper position or positional relationship is only for It is convenient to describe the present invention and simplify the description, instead of indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

It should be noted that the term "thickness" is a neutral word, and does not mean that it is biased towards thick or thin. It just means that there is a reference value. The value is uncertain and will be determined according to the actual situation.

In addition, it should be noted that the drawings provide only the structures and steps closely related to the present invention, and omit some details that have little to do with the invention. The purpose is to simplify the drawings so that the invention is clear at a glance, rather than showing The actual device and method are exactly the same as the drawings, and are not limited to the actual device and method.

The present invention provides a display panel. The display panel includes the embodiments shown in FIGS. 1 to 4 and a combination of the embodiments.

As shown in FIGS. 1-4, the display panel 100 includes an array substrate 101, a spacer layer 102 disposed on the array substrate 101, a pixel definition layer 103 disposed on the spacer layer 102, and a pixel definition layer 103 disposed on the pixel The pixel layer 104 on the layer is defined. Wherein, the pixel layer 104 includes a plurality of sub-pixels 1041 of different colors, the pixel definition layer 103 includes a plurality of pixel definition portions 1031, and the pixel definition portions 1031 are arranged between two corresponding adjacent sub-pixels 1041, The pixel defining portion 1031 is used to block the two adjacent sub-pixels 1041; the padding layer 102 includes a plurality of padding portions 1021, and the padding portion 1021 is disposed on the corresponding pixel defining portion 1031 and Between the array substrates 101, the pad part 1021 is used to raise the pixel defining part 1031.

In an embodiment, as shown in FIGS. 2 and 4, the display panel 100 further includes an anode layer 107, and the anode layer 107 is disposed between the array substrate 101 and the gasket layer 102. Wherein, the anode layer 107 may be formed through a process of physical vapor deposition-development-wet etching, and the material of the anode layer 107 may be a reflective material or a transmissive material. Specifically, when the display panel 100 is of a top emission type, the anode layer 107 is made of a reflective material; when the display panel 100 is of a bottom emission type, the anode layer 107 is made of a transmissive material. It can be understood that the sub-pixels 1041 may be formed between the adjacent pixel defining portions 1031 on the anode layer 107.

In an embodiment, the sub-pixels of the same color may be arranged along the short axis 105 or the long axis 106 of the display panel 100. For example, in FIG. 1, the pixel layer 104 includes red R sub-pixels, green G sub-pixels, and blue B sub-pixels. The sub-pixels 1041 of the same color are arranged along the short axis 105 direction of the display panel 100; For example, in FIG. 3, the sub-pixels of the same color are arranged along the direction of the long axis 106 of the display panel 100.

Specifically, the pixel defining part 1031 includes a first pixel defining part 10311, the first pixel defining part 10311 is arranged between the sub-pixels 1041 of different colors, and the padding part 1021 is arranged on the first pixel defining Between the portion 10311 and the array substrate 101. The first pixel defining portion 10311 is used to block the two adjacent sub-pixels 1041 of different colors, and the padding portion 1021 is used to raise the first pixel defining portion 10311. As shown in FIGS. 2 and 4, taking three columns of sub-pixels of different colors as an example, the first pixel defining part 10311 may include adjacent green R sub-pixels and green G sub-pixels. A strip between the G sub-pixel and the blue B sub-pixel. Correspondingly, the pad portion 1021 may include a pad strip 1021 disposed under the corresponding first pixel defining portion 10311.

In an embodiment, as shown in FIGS. 2 and 4, the cross-sectional figure of the pixel defining portion 1031 may be a trapezoid, and the length of the upper base of the trapezoid is smaller than the length of the lower base. The cross-sectional pattern of the padding portion 1021 may also be a trapezoid, the upper base of the trapezoid has a length less than the length of the lower base, and the upper base length of the padding portion 1021 is greater than or equal to the corresponding pixel definition portion. Length of bottom bottom. Specifically, as shown in FIGS. 2 and 4, the inclination angle 108 on both sides of the cross-sectional pattern of the pixel defining portion 1031 and the padding portion 1021 may be set to be less than or equal to 60°, wherein the inclination angle may preferably be 1°-60 °. In this way, when the liquid paint is applied, the liquid paint will flow to the anode layer 107 along the corresponding side of the pixel defining part 1031 and the pad part 1021. When the paint is coated thickly, the adjacent difference can also be avoided. The pigments of the colors mix and overflow with each other.

In particular, the height of the pad part 1021 is smaller than the height of the pixel defining part 1031. For example: the thickness of the pixel defining portion 1031 can be set to about 1 micron. If the thickness of the padding portion 1021 is 0.2 micron, the ink holding capacity between adjacent pixel defining portions 1031 can be increased by about 20%; if The thickness of the pad portion 1021 is 0.5 μm, which can increase the ink holding capacity between adjacent pixel defining portions 1031 by about 50%. In this way, when the material of the pixel defining portion 1031 is coated, since the thickness of the pad portion 1021 is small and the angle between the two sides of the cross-sectional pattern of the pad portion 1021 and the anode layer 107 is also small, the pixel The material of the definition part 1031 will not flow to the anode layer 107 and cause loss of the pixel definition layer 103.

In particular, the material of the cushion layer 102 may be a hydrophilic material. Optionally, the spacer layer 102 may be made of an organic photoresist material, and the method for forming the spacer layer 102 can refer to the yellow light process. It can be understood that the pixel defining portion 1031 is made of a hydrophobic material, the material of the cushion layer 102 is made of a hydrophilic material, and the main component of the liquid pigment is a polar solvent, which has good hydrophilicity. In this way, when the liquid pigment is applied, the corresponding padding portion 1021 can absorb the liquid pigment compared to the pixel defining portion 1031, so that the liquid pigment is better spread on the anode layer 107, and the pixel defining portion 1031 The liquid pigment will not be adsorbed either, which prevents the liquid pigment from overflowing along the first pixel defining portion 10311 and causing the pigments of different colors to mix and overflow with each other.

The present invention also provides a manufacturing method of a display panel. Referring to FIG. 5, the method includes:

S101: Provide an array substrate;

The array substrate includes a substrate and a thin film transistor layer patterned on the upper surface of the substrate. The thin film transistor layer may be made of, for example, at least one of low-temperature polysilicon materials, oxide materials, or amorphous silicon materials. preparation;

S102: forming a gasket layer on the array substrate, the gasket layer covering

Including multiple litter parts;

Before forming the cushion material layer, it further includes:

Forming an anode layer on the array substrate;

Wherein, the anode layer may be formed through a process of physical vapor deposition-development-wet etching, and the material of the anode layer may be a reflective material or a transmissive material. Specifically, when the display panel is of a top emission type, the anode layer is made of reflective material; when the display panel is of a bottom emission type, the anode layer is made of a transmissive material;

S103: A pixel defining layer is formed on the padding layer, the pixel defining layer includes a plurality of pixel defining portions, wherein the pixel defining portions are arranged on corresponding padding portions, and the padding portions are used for padding. The pixel definition part;

S104: A pixel layer is formed on the pixel definition layer, the pixel layer includes a plurality of sub-pixels of different colors, wherein the pixel definition part is arranged between two corresponding adjacent sub-pixels, and the pixel definition part is used for To block the two adjacent sub-pixels.

Specifically, the gasket part is disposed between the corresponding pixel defining part and the anode layer, and the material of the gasket layer may be a hydrophilic material.

Further, the pixel layer includes sub-pixels of different colors, and the sub-pixels of the same color may be formed along the long axis or the short axis of the array substrate. For example, if the sub-pixels of the same color are formed along the long axis of the array substrate, before the pixel layer is formed, the pad portion is also formed along the long axis of the array substrate, and the pad portion It is formed between the adjacent sub-pixels of different colors, and is used to heighten the corresponding pixel defining part to prevent the paints of different colors from mixing or overflowing with each other.

In an embodiment, the cross-sectional figure of the pixel defining part may be a trapezoid, and the length of the upper base of the trapezoid is smaller than the length of the lower base. The cross-sectional pattern of the padding portion may also be a trapezoid, the length of the upper base of the trapezoid is less than the length of the lower base, and the length of the upper base of the padding portion is greater than or equal to the lower base of the corresponding pixel defining portion Side length. Specifically, the inclination angle of the two sides of the cross-sectional pattern of the pixel defining portion and the padding portion may be set to be less than or equal to 60°, and the inclination angle may preferably be 1°-60°. In this way, when the liquid paint is applied, the liquid paint will flow along the corresponding side of the pixel defining part and the pad part to the anode layer. When the paint is thickly coated, it can also avoid adjacent different colors of paint Color mixing and overflow between each other.

In particular, the thickness of the pad part is much smaller than the thickness of the pixel defining part. For example: the thickness of the pixel defining portion can be set to about 1 micron, if the thickness of the padding portion is 0.2 micron, the ink holding capacity between adjacent pixel defining portions can be increased by about 20%; if the pad The thickness of the material part is 0.5 microns, which can increase the ink holding capacity between adjacent pixel definition parts by about 50%. In this way, when the material of the pixel defining portion is coated, since the thickness of the pad portion is small and the inclination angle on both sides of the cross-sectional pattern of the pad portion is also small, the material of the pixel defining portion will not go to The anode layer flows and causes the loss of the pixel definition layer.

In particular, the material of the cushion layer may be a hydrophilic material. Optional

Yes, the gasket layer can be made of organic photoresist material, and the method for forming the gasket layer can refer to the yellow light process. It can be understood that the pixel definition part is made of hydrophobic material, the material of the cushion layer is made of hydrophilic material, and the main component of the liquid pigment is a polar solvent, which has good hydrophilicity. In this way, when the liquid pigment is applied, the corresponding padding portion can attract the liquid pigment compared to the pixel defining portion, so that the liquid pigment is better spread on the anode layer, and avoiding the liquid pigment along the first pixel defining portion Spilling causes mixing and overflowing of paints of different colors.

The beneficial effects of the present invention are: the present invention provides a display panel and a manufacturing method thereof. The display panel is provided with a gasket layer, wherein the gasket layer is provided between the array substrate and the pixel definition layer for heightening the The pixel definition layer ensures that there is no color mixing and overflow between different colors of ink, which can improve the yield of the display panel.

The structure of the display panel provided by the embodiments of the present invention and the manufacturing method of the display panel are described in detail above. Specific examples are used in this article to illustrate the principles and implementations of the present invention. The description of the above embodiments is only used To help understand the technical solutions of the present invention and its core ideas; those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or equivalently replace some of the technical features; and these Modification or replacement does not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

A display panel, which comprises: an array substrate, a spacer layer arranged on the array substrate, a pixel definition layer arranged on the spacer layer, and a pixel layer arranged on the pixel definition layer;

The pixel layer includes a plurality of sub-pixels of different colors;

The pixel definition layer includes a plurality of pixel definition parts, the pixel definition parts are arranged between two corresponding adjacent sub-pixels, and the pixel definition parts are used to block the two adjacent sub-pixels;

The padding layer includes a plurality of padding portions, the padding portion is disposed between the corresponding pixel defining portion and the array substrate, and the padding portion is used to heighten the pixel defining portion;

The constituent material of the cushion layer is a hydrophilic material, and the constituent material of the pixel defining layer is a hydrophobic material.
The display panel of claim 1, wherein the pixel defining part comprises a first pixel defining part, the first pixel defining part is arranged between sub-pixels of different colors, and the padding part is arranged on the Between the first pixel defining part and the array substrate.
8. The display panel of claim 1, wherein the height of the pad part is smaller than the height of the corresponding pixel defining part.
The display panel of claim 1, wherein the display panel further comprises an anode layer, the anode layer being disposed between the array substrate and the spacer layer.
5. The display panel of claim 4, wherein the constituent material of the anode layer is a reflective material or a transmissive material.
3. The display panel of claim 1, wherein the cross-sectional pattern of the pixel defining portion is a trapezoid, and the length of the upper base of the trapezoid is smaller than the length of the lower base.
7. The display panel of claim 6, wherein the cross-sectional pattern of the padding portion is a trapezoid, the length of the upper base of the trapezoid is smaller than the length of the lower base, and the length of the upper base of the padding portion is greater than or equal to The length of the bottom bottom of the corresponding pixel definition part.
A display panel, which comprises: an array substrate, a spacer layer arranged on the array substrate, a pixel definition layer arranged on the spacer layer, and a pixel layer arranged on the pixel definition layer;

The pixel layer includes a plurality of sub-pixels of different colors;

The pixel definition layer includes a plurality of pixel definition parts, the pixel definition parts are arranged between two corresponding adjacent sub-pixels, and the pixel definition parts are used to block the two adjacent sub-pixels;

The padding layer includes a plurality of padding portions, the padding portions are disposed between the corresponding pixel defining portion and the array substrate, and the padding portion is used to elevate the pixel defining portion.
8. The display panel of claim 8, wherein the pixel defining part comprises a first pixel defining part, the first pixel defining part is arranged between sub-pixels of different colors, and the padding part is arranged on the Between the first pixel defining part and the array substrate.
8. The display panel of claim 8, wherein the constituent material of the cushion layer is a hydrophilic material.
8. The display panel of claim 8, wherein the constituent material of the pixel definition layer is a hydrophobic material.
8. The display panel of claim 8, wherein the height of the pad part is smaller than the height of the corresponding pixel defining part.
8. The display panel of claim 8, wherein the display panel further comprises an anode layer disposed between the array substrate and the spacer layer.
The display panel of claim 13, wherein the constituent material of the anode layer is a reflective material or a transmissive material.
8. The display panel of claim 8, wherein the cross-sectional pattern of the pixel defining portion is a trapezoid, and the length of the upper base of the trapezoid is smaller than the length of the lower base.
The display panel according to claim 15, wherein the cross-sectional figure of the cushion part is a trapezoid, the upper base of the trapezoid has a length less than the length of the lower base, and the upper base length of the cushion is greater than or equal to The length of the bottom bottom of the corresponding pixel definition part.
A method for manufacturing a display panel, including:

Provide an array substrate;

Forming a gasket layer on the array substrate, the gasket layer including a plurality of gasket parts;

A pixel definition layer is formed on the spacer layer, the pixel definition layer includes a plurality of pixel definition parts, wherein the pixel definition parts are arranged on the corresponding spacer parts, and the spacer parts are used to raise the Pixel definition department;

A pixel layer is formed on the pixel definition layer, the pixel layer includes a plurality of sub-pixels of different colors, wherein the pixel definition part is arranged between two corresponding adjacent sub-pixels, and the pixel definition part is used for blocking The two adjacent sub-pixels.