CN111354870B

CN111354870B - OLED display

Info

Publication number: CN111354870B
Application number: CN202010142753.1A
Authority: CN
Inventors: 王磊
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2021-06-01
Anticipated expiration: 2040-03-04
Also published as: CN111354870A

Abstract

The invention discloses an OLED display, which comprises an array substrate, a light-emitting layer, an oleophobic dam and an encapsulation layer, wherein the light-emitting layer is arranged on the array substrate; wherein the light emitting layer is disposed over the array substrate; the oleophobic dam is arranged above the array substrate and surrounds the light-emitting layer; and the packaging layer is arranged above the array substrate and covers the light-emitting layer and the oleophobic dam, and the invention has the advantages that: the oleophobic dam or the oleophobic layer coated on the surface of the dam body is made of oleophobic material with active silane group or fluorine modified group, so that the organic packaging layer printed by ink-jet is subjected to flowing resistance near the oleophobic dam or oleophobic layer, and the organic packaging layer is prevented from overflowing, thereby achieving the purpose of enhancing the packaging effect.

Description

OLED display

Technical Field

The invention relates to the technical field of display, in particular to an OLED display.

Background

Organic Light-Emitting diodes (OLEDs) have the advantages of wide color gamut, high contrast, self-luminescence, lightness, thinness, and foldability, and are widely used in the fields of display, illumination, and the like. The light-emitting layer material and the cathode material of the OLED display are very sensitive to water and oxygen, and the water and the oxygen can seriously affect the light-emitting effect of the OLED display, so that the packaging layer for blocking the invasion of external water and oxygen is very important.

The packaging layer of the current OLED display generally adopts an inorganic/organic/inorganic composite structure, and the overlapping structure has the characteristics of packaging and flexibility, wherein the packaging effect of the inorganic packaging layer is outstanding, and the bending performance of the organic packaging layer is excellent. The organic encapsulation layer can be prepared by means of Ink Jet Printing (IJP). As shown in fig. 1, the encapsulation layer may be three layers of a first inorganic encapsulation layer 131, an organic encapsulation layer 132, and a second inorganic encapsulation layer 133. Since the dam body 142 is made of a relatively oleophilic material, when the organic encapsulation layer 132 approaches the dam body 142 due to design or process variation, the organic encapsulation layer 132 tends to approach and cover the dam body 142, and finally overflows the dam body 142, so that the organic encapsulation layer 132 is directly exposed to water and oxygen, and the OLED display encapsulation may fail.

Disclosure of Invention

In order to solve the above problems, the present invention provides an OLED display, which effectively solves the technical problem in the prior art that the organic encapsulation layer overflows the dam body to directly expose the organic encapsulation layer in the water or oxygen environment.

The invention aims to prevent the organic packaging layer from overflowing out of the dam body and to prevent the organic packaging layer from being exposed in the environment of water or oxygen, thereby enhancing the packaging effect of the OLED display.

In order to achieve the above object, the present invention provides an OLED display, including an array substrate, a light emitting layer, an oleophobic dam, and an encapsulation layer; wherein the light emitting layer is disposed over the array substrate; the oleophobic dam is arranged above the array substrate and surrounds the light-emitting layer; and the packaging layer is arranged on the array substrate and covers the light-emitting layer and the oleophobic dam.

Further, all materials used by the oleophobic dam are oleophobic materials.

Further, the oleophobic dam comprises a dam body; and the oil drainage layer is coated on the surface of the dam body.

Further, all materials used by the oil-repellent layer are oil-repellent materials.

Further, the oleophobic material is a substance having a reactive silane group or fluorine-modified group.

Further, the packaging layer is a laminated structure of an organic packaging layer and an inorganic packaging layer.

Further, the encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer; the first inorganic packaging layer is arranged above the luminous layer and coats the luminous layer; the organic packaging layer is arranged above the first inorganic packaging layer; and the second inorganic packaging layer is arranged above the organic packaging layer and coats the organic packaging layer and the oleophobic dam.

Further, the height of the light-emitting layer on the array substrate is smaller than the height of the oleophobic dam on the array substrate.

Further, the light-emitting layer is an EL light-emitting layer.

Further, the device also comprises a substrate, wherein the substrate is made of a flexible PI layer or a PMMC layer or rigid glass.

The invention has the advantages that: the invention provides an OLED display for preventing an organic packaging layer from overflowing, wherein the material of an oleophobic dam or an oleophobic layer arranged on the surface of a dam body is an oleophobic material with active silane groups or fluorine modified group substances, so that the organic packaging layer printed by ink-jet printing is subjected to flowing resistance near the oleophobic dam or the oleophobic layer to prevent the organic packaging layer from overflowing, thereby achieving the purpose of enhancing the packaging effect.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.

FIG. 1 is a schematic cross-sectional view of a prior art overflow dam body outside an organic package layer;

FIG. 2 is a schematic view of a stack structure of an OLED display according to a first embodiment of the present invention;

fig. 3 is a schematic view of a stacked structure of an OLED display according to a second embodiment of the present invention.

The reference numbers illustrate:

100. the organic light-emitting diode array substrate comprises a substrate, 110, an array substrate, 120, an EL light-emitting layer, 130, an encapsulation layer, 131, a first inorganic encapsulation layer, 132, an organic encapsulation layer, 133, a second inorganic encapsulation layer, 140, an oleophobic dam, 141, an oleophobic layer, 142 and a dam body.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features.

First embodiment

As shown in fig. 2, to solve the above-mentioned problems in the prior art, the present invention provides an OLED display for preventing an organic encapsulation layer 132 from overflowing, comprising: the light-emitting device comprises a substrate 100, an array substrate 110, an oleophobic dam 140, an EL light-emitting layer 120 and an encapsulation layer 130.

The array substrate 110 is disposed above the substrate 100, and the array substrate 110 is made of a flexible PI or PMMC layer or rigid glass.

The oil-repellent dam 140 is disposed above the array substrate 110 and surrounds the EL light-emitting layer 120, and the entire material used for the oil-repellent dam 150 is an oil-repellent material having a reactive silane group or a fluorine-modified group.

The EL light emitting layer 120 is disposed above the array substrate 110, and the height of the EL light emitting layer 120 above the array substrate 110 is smaller than the height of the oleophobic dam 150 above the array substrate 110.

The encapsulation layer 130 is a stacked structure of an organic encapsulation side and an inorganic encapsulation layer, and the encapsulation layer 130 includes a first inorganic encapsulation layer 131, an organic encapsulation layer 132, and a second inorganic encapsulation layer 133, wherein the first inorganic encapsulation layer 131 is disposed above the EL light-emitting layer 120 and covers the EL light-emitting layer 120; the organic encapsulation layer 132 is disposed over the first inorganic encapsulation 131; and a second inorganic encapsulating layer 133 disposed over the organic encapsulating layer 132 and encapsulating the organic encapsulating layer 132 and the oleophobic dam 140.

In this example, when organic encapsulation layer 132 flows adjacent to oleophobic dam 140, organic encapsulation layer 132 is subject to resistance to flow due to the oleophobic property of oleophobic dam 140, thereby stopping flow near oleophobic dam 140, thereby preventing organic encapsulation layer 132 from covering or overflowing out of oleophobic dam 140. Accordingly, the packaging effect of the OLED display is well enhanced.

Second embodiment

As shown in fig. 3, to solve the above-mentioned problems in the prior art, the present invention also provides an OLED display for preventing the organic encapsulation layer 132 from overflowing, comprising: a substrate 100, an array substrate 110, an oleophobic dam 140, an EL light emitting layer 120, and an encapsulation layer 130.

The oleophobic dam 140 comprises a dam body 142 and an oleophobic layer 141, wherein the oleophobic layer 141 is coated on the surface of the dam body 142, and all materials used by the oleophobic layer 141 are oleophobic materials with active silane groups or fluorine modified group substances. The other structures are consistent with those in fig. 2 and are not described again.

In this example, when organic encapsulation layer 132 flows adjacent to oleophobic dam 140, organic encapsulation layer 132 may be subject to resistance to flow due to the oleophobic property of oil-phobic layer 141, thereby stopping flow near oil-phobic layer 141, thereby preventing organic encapsulation layer 132 from covering or overflowing out of oleophobic dam 140. Accordingly, the packaging effect of the OLED display is well enhanced.

The above detailed description of the OLED display provided in this embodiment is provided to explain the principles and embodiments of the present invention by applying specific examples, and the description of the above examples is only used to help understanding the technical solutions and the core ideas of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An OLED display, comprising:

an array substrate;

the light emitting layer is arranged above the array substrate;

the oleophobic dam is arranged above the array substrate and surrounds the light-emitting layer; and

the packaging layer set up in array substrate top, and cover the luminescent layer with oleophobic dam, wherein, oleophobic dam includes the dam body and dredges the oil reservoir, it is cladding in to dredge the oil reservoir the surface of dam body.

2. The OLED display of claim 1, wherein the oleophobic dam is made of an oleophobic material.

3. The OLED display according to claim 1, wherein the oil-repellent layer is made of an oil-repellent material.

4. The OLED display of claim 2, wherein the oleophobic material is a substance having reactive silane groups or fluorine-modified groups.

5. The OLED display of claim 1, wherein the encapsulation layer is a stacked structure of an organic encapsulation layer and an inorganic encapsulation layer.

6. The OLED display of claim 5, wherein the encapsulation layer comprises:

the first inorganic packaging layer is arranged above the luminous layer and coats the luminous layer;

an organic encapsulation layer disposed over the first inorganic encapsulation layer;

and the second inorganic packaging layer is arranged above the organic packaging layer and coats the organic packaging layer and the oleophobic dam.

7. The OLED display of claim 1, wherein a height of the light emitting layer above the array substrate is less than a height of the oleophobic dam above the array substrate.

8. The OLED display device claimed in claim 1, wherein the light-emitting layer is an EL light-emitting layer.

9. The OLED display of claim 1, further comprising a substrate, wherein the substrate material is a flexible PI, PMMC layer, or rigid glass.