WO2020010711A1

WO2020010711A1 - Display panel and display apparatus

Info

Publication number: WO2020010711A1
Application number: PCT/CN2018/107537
Authority: WO
Inventors: 吕晓文
Original assignee: 深圳市华星光电半导体显示技术有限公司
Priority date: 2018-07-10
Filing date: 2018-09-26
Publication date: 2020-01-16
Also published as: CN109031740A; CN109031740B

Abstract

Disclosed is a display panel, which comprises a display region and a non-display region surrounding the display region, wherein the non-display region of the display panel comprises a base substrate (10), a circuit layer (20) and a frame sealant (30), the circuit board (20) is arranged on a surface of the base substrate (10), the circuit layer (20) comprises a first surface (201) facing away from the base substrate (10) and a side face (202) connected between the first surface (201) and the base substrate (10), the frame sealant (30) comprises a first part (31) at least partially covering the first surface (201) and a second part (32) covering the side face (202), and the first part (31) and the second part (32) are connected with each other.

Description

Display panel and display device

Technical field

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

Background technique

With the improvement of thin film transistor (Thin Film Transistor, TFT) performance, the gate drive unit (Gata On Array, GOA) technology provided on the array substrate has been widely used in current display panels. GOA technology has a series of advantages such as saving gate drive, improving product yield, and achieving narrow bezel design for display panels. The general GOA wiring structure is shown in Figure 1. GOA includes GOA circuit and GOA (Busline). The frame adhesive is located outside the GOA trace and has a certain distance from the GOA circuit.

technical problem

However, when researchers in the industry are pursuing narrow-frame display panels, and the frame adhesive is coated on the GOA traces to effectively reduce the frame width of the display panel, the protective effect of the frame adhesive on the GOA traces will weaken. In the conventional design (as shown in Figure 1), the frame adhesive is all located on the outside of the GOA trace, that is, all the frame adhesive can prevent moisture and oxygen in the environment from invading. However, in the narrow frame design (as shown in Figure 2), the frame adhesive partially covers the GOA trace, and the width of the outermost distance of the GOA trace from the frame adhesive is significantly reduced, and the protection effect of the frame adhesive on the GOA trace becomes significantly weaker. When the display panel is in a high-temperature and high-humidity environment, it is easy to be invaded by water vapor, which causes the outermost vias of the GOA wiring to corrode, making the line ineffective.

Technical solutions

The purpose of the present application is to provide a display panel and a display device, which are used to prevent moisture and oxygen in the air from entering the display panel to corrode the wiring of the panel and the device to fail.

A display panel includes a display area and a non-display area surrounding the display area, wherein the non-display area of the display panel includes a base substrate, a circuit layer, and a frame adhesive, and the circuit layer is provided on the base substrate. The circuit layer includes a first surface remote from the base substrate and a side surface connected between the first surface and the base substrate, and the sealant includes at least partially covering the first surface A first part and a second part covering the side, the first part and the second part are connected to each other, and both the first part and the second part include a protective material for preventing water Oxygen invades the circuit layer;

The first part includes a first frame rubber body, and a protective material of the first portion is located on a surface of the first frame rubber body facing the second portion to form a first protective layer, or the first portion protective material Dispersed in the first frame gum body;

The circuit layer includes a first metal layer provided on a surface of the base substrate, a first insulating layer covering the first metal layer, and a first insulating layer provided on the first insulating layer away from a surface of the first metal layer. Two metal layers, a second insulating layer covering the second metal layer, and a conductive layer covering the first insulating layer and the second insulating layer, the conductive layer is in contact with the second metal layer through a via hole In a direction from the first metal layer to the second metal layer, the first portion covers the via hole.

According to the display panel provided in the embodiment of the present application, wherein the second part includes a second frame rubber body, the second frame rubber body and the first frame rubber body are connected to each other, and the second portion is a protective material. A second protective layer is formed on a contact surface between the second frame rubber body and the circuit layer, or the second portion of the protective material is dispersed in the second frame rubber body.

According to the display panel provided in the embodiment of the present application, the first protection layer is located on a contact surface between the first frame body and the circuit layer, and the first protection layer and the second protection layer A continuous protective layer is formed, and the protective layer is used to protect the circuit layer.

According to the display panel provided in the embodiment of the present application, wherein the protective layer includes a hydrophilic layer and a hydrophobic layer, the hydrophobic layer and the hydrophilic layer form an alternately stacked multilayer structure, and the protective layer and the protective layer A layer in contact with the first frame rubber body, the second frame rubber body, and the circuit layer is a hydrophobic layer.

According to the display panel provided in the embodiment of the present application, the first frame body includes a third surface facing the display area, and the first protective layer is located on the first surface and protrudes from the third surface. .

According to the display panel provided in the embodiment of the present application, the first protective layer covers a first surface of the circuit layer.

According to the display panel provided in the embodiment of the present application, the density of the protective material in the second frame rubber body is greater than the density of the protective material in the first frame rubber body.

A display panel includes a display area and a non-display area including the display area, wherein the non-display area of the display panel includes a base substrate, a circuit layer, and a frame adhesive, and the circuit layer is provided on the base substrate The circuit layer includes a first surface remote from the base substrate and a side surface connected between the first surface and the base substrate, and the sealant includes at least partially covering the first surface A first part and a second part covering the side, the first part and the second part are connected to each other, and both the first part and the second part include a protective material for preventing water Oxygen invades the circuit layer.

According to the display panel provided in the embodiment of the present application, the first portion includes a first frame rubber body, and a protective material of the first portion is located on a surface of the first frame rubber body facing the second portion to form a first protective layer. Or, the protective material of the first part is dispersed in the first frame gum body.

According to the display panel provided in the embodiment of the present application, the second part includes a second frame rubber body, the second frame rubber body and the first frame rubber body are connected to each other, and a protective material of the second portion is located at A contact surface between the second frame rubber body and the circuit layer forms a second protective layer, or the second portion of the protective material is dispersed in the second frame rubber body.

According to the display panel provided in the embodiment of the present application, the circuit layer includes a first metal layer provided on a surface of the base substrate, a first insulation layer covering the first metal layer, and the first insulation layer. A second metal layer facing away from the surface of the first metal layer, a second insulating layer covering the second metal layer, and a conductive layer covering the first insulating layer and the second insulating layer, the conductive layer The first metal layer is in contact with the second metal layer through a via hole, and the first portion covers the via hole in a direction from the first metal layer to the second metal layer.

According to the display panel provided in the embodiment of the present application, the first protective layer is located on a contact surface between the first frame adhesive body and the circuit layer, and the first protective layer and the second protective layer are formed. A continuous protective layer for protecting the circuit layer.

According to the display panel provided in the embodiments of the present application, the protective layer includes a hydrophilic layer and a hydrophobic layer, and the hydrophobic layer and the hydrophilic layer form an alternately stacked multilayer structure, and the protective layer is in contact with the first layer. A frame body, a layer in contact with the second frame body and the circuit layer are hydrophobic layers.

According to the display panel provided by the embodiment of the present application, the first frame body includes a third surface facing the display area, and the first protective layer is located on the first surface and protrudes from the third surface.

A display device includes a controller and the display panel, and the controller controls the display panel to be turned on or off.

Beneficial effect

The surface of the display panel described in this application is covered with a protective material that blocks moisture and oxygen, so that the display panel with a narrow frame cannot use moisture and oxygen in the air to enter the display panel during use or testing, preventing the circuit. Layer corrosion causes device failure.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present application or the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

FIG. 1 is a schematic plan view of a display panel in the prior art.

FIG. 2 is a schematic plan view of a narrow frame display panel in the prior art.

FIG. 3 is a schematic diagram showing a structure of an embodiment of a display panel according to the present application.

FIG. 4 is a schematic diagram of a structure of a second embodiment of a display panel according to the present application.

FIG. 5 is a schematic diagram showing a structure of a third embodiment of a display panel according to the present application.

FIG. 6 is a schematic diagram showing a structure of a fourth embodiment of a display panel according to the present application.

FIG. 7 is a schematic diagram showing a structure of a fifth embodiment of a display panel according to the present application.

FIG. 8 is a schematic diagram showing a structure of a sixth embodiment of a display panel according to the present application.

Embodiments of the 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 this application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

Referring to FIG. 3, a preferred embodiment of the present application provides a display panel. The display panel is a narrow-frame display panel, such as a liquid crystal display (LCD) or an organic light-emitting diode (OLED) panel. Diode). The display panel includes a display area and a non-display area. In the non-display area, the display panel includes a GOA circuit and a GOA trace. The GOA circuit is used to drive a gate on an array substrate. Specifically, the display panel includes a base substrate 10, a circuit layer 20 and a frame adhesive 30. The circuit layer 20 is disposed on a surface of the base substrate 10. The circuit layer 20 includes a first surface 201 remote from the base substrate 10 and is connected to the first surface 201 and the base substrate 10. Between the sides 202. The sealant 30 includes a first portion 31 that at least partially covers the first surface 201 and a second portion 32 that covers the side surface 202. The first portion 31 and the second portion 32 are connected to each other, and the first Both the part 31 and the second part 32 include a protective material for preventing water and oxygen from invading the circuit layer 20 and preventing the circuit layer 20 from being attacked by moisture and oxygen to cause the display panel to fail. The circuit layer 20 is a GOA signal line.

In this embodiment, the base substrate 10 is a glass substrate. The circuit layer 20 is disposed on a surface of the base substrate 10. The circuit layer 20 includes a first metal layer 21 provided on a surface of the base substrate 10, a first insulating layer 22 covering the first metal layer 21, and the first insulating layer 22 provided away from the first insulating layer 22. A second metal layer 23 on the surface of a metal layer 21, a second insulating layer 24 covering the second metal layer 23, and a conductive layer 25 covering the first insulating layer 22 and the second insulating layer 24. The conductive layer 25 is in contact with the second metal layer 23 through a via hole 251. Generally, in a display panel, the first metal layer 21 is a gate, the first insulation layer 22 is a gate insulation layer (GI, Gate Insulation), the second metal layer 23 is a source and a drain, and the second insulation layer 24 is an insulating protection layer. The conductive layer 25 is in contact with the first metal layer 21 through a contact hole 252. The contact hole 252 penetrates the second insulating layer 24, the second metal layer 23, and the first insulating layer 22. In this embodiment, the first insulating layer 22 and the second insulating layer 24 are made of an inorganic material such as silicon nitride or silicon oxide, and are used to prevent a leakage current between the first metal layer 21 and the second metal layer 22. The conductive layer 25 is made of indium tin oxide (ITO), and is used for conducting electricity in the wiring layer 20. Further, the first surface 201 of the circuit layer 20 in contact with the sealant 30 is the surface of the conductive layer 25 facing away from the base substrate 10, and the side surface 202 is the distance of the conductive layer 25 away from The sides of the display area are described.

In the direction of the first metal layer 21 toward the second metal layer 23 (that is, in the upward direction in the figure), the first portion 31 of the frame adhesive 30 covers the via hole 251. Specifically, the first portion 31 includes a first frame rubber body 311, and a protective material of the first portion 31 is located on a surface of the first frame rubber body 311 facing the second portion 32 to form a first protective layer 312. The second portion 32 includes a second frame rubber body 321, the second frame rubber body 321 and the first frame rubber body 311 are connected to each other, and a protective material of the second portion 32 is located in the second frame rubber A contact surface between the body 321 and the circuit layer 20 forms a second protection layer 322. In this embodiment, the first protective layer 312 is located on a contact surface between the first frame adhesive body 311 and the circuit layer 20 (that is, an edge of the first surface 201 away from the display area). A second protection layer 322 covers the side surface 202. The first protection layer 312 and the second protection layer 322 form a continuous protection layer, and the protection layer is used to protect the circuit layer 20. Specifically, the protective layer is a barrier layer made of an inorganic insulating material such as SiNx or SiNx, and has a single-layer structure. The barrier layer covers the via hole 251 and blocks moisture and oxygen in the air from outside the display panel. To prevent it from entering the circuit of the panel, to prevent the through-hole 251 from corroding, causing the display panel to fail. In other implementations of this embodiment, the protective layer may also be a dry layer made of a dry material such as an aluminum-containing polymer. The moisture and oxygen in the air are fixed in the dry layer to prevent it from entering the display. Inside the panel. It can be understood that the protective layer may also be a hydrophobic layer made of a silane-based hydrophobic material, and the hydrophobic layer may also isolate moisture from the display panel and protect the via holes 251 and the circuit layer 20.

Referring to FIG. 4, in another embodiment of the display panel described in this application, the difference from the above embodiment is that the protective layer includes a hydrophilic layer and a hydrophobic layer, and the hydrophobic layer and the hydrophilic layer The layers form a multilayer structure that is alternately stacked, and a layer of the protective layer that is in contact with the first frame rubber body 311, the second frame rubber body 321, and the circuit layer 20 is a hydrophobic layer. In this embodiment, the protective layer is composed of a first hydrophobic layer, a hydrophilic layer, and a second hydrophobic layer, and the protective layer has a three-layer structure. The first hydrophobic layer is provided on a surface of the first frame rubber body 311 and the second frame rubber body 321 facing the circuit layer 20 to prevent moisture and oxygen in the air from invading. The middle of the first hydrophobic layer and the second hydrophobic layer traps moisture and oxygen that the first hydrophobic layer fails to block and invade in the hydrophilic layer, and the second hydrophobic layer is provided on the first On the surface 201 and the side 202, the moisture and oxygen in the hydrophilic layer are further prevented from invading the display panel. The protective layer composed of a three-layer structure protects the via hole 251 to the greatest extent, and prevents the display panel from being exposed to moisture and oxygen. erosion. It should be noted that, in other implementations of this embodiment, the protective layer may also be five or seven layers, as long as the outermost side of the protective layer is a hydrophobic layer, which can protect the display panel from moisture and oxygen. Erosion is sufficient.

Referring to FIG. 5, in a third embodiment of the display panel described in this application, the difference from the above two embodiments is that the first frame body 311 includes a third surface 3111 facing the display area. The first protective layer 312 is located on the first surface 201 and protrudes from the third surface 3111. The first protective layer 312 protrudes from the third surface 311 to more completely cover the via hole 251, so that the path for moisture and oxygen in the air to enter the via hole 251 is longer, so that the via hole 251 is better protected from water and oxygen. Erosion can cause device damage.

Referring to FIG. 6, in a fourth embodiment of the display panel described in this application, the difference from the third embodiment is that the first protective layer 312 protrudes from the first portion of the first frame body 311. Three surfaces 3111 cover the first surface 201 of the circuit layer 20, so that the entire circuit layer 20 is under the protection of the first protective layer 312, and at the same time, both the via hole 251 and the contact hole 252 are protected from moisture and oxygen. And make the device ineffective. It should be noted that, in this embodiment, the material of the first protective layer 312 needs to have good adhesion to the frame body 31 and the semiconductor at the same time, and it will not pollute the liquid crystal in the liquid crystal display panel and will not affect A display effect of the display panel.

Please refer to FIG. 7. In a fifth embodiment of the display panel described in this application, the difference from the above four embodiments is that the first protective layer 312 covers the first frame body 311 and faces the On the surface of the second part, the protective material of the second part 32 is dispersed in the second frame body. Generally, in a direction from the display area to the non-display area, the width of the first portion 31 is 1000 um, and the width of the second portion 32 is 200 um. Due to the small thickness of the second portion 32, it is difficult to implement the second frame body 321 and the second protective layer 322 described in the above embodiment. In this embodiment, the protective material is similar to a dry aluminum-containing polymer. Materials or hydrophobic materials similar to silanes are mixed in the frame material in the form of doping, which can also protect the vias 251 so that moisture and oxygen cannot enter the circuit of the panel and prevent moisture and oxygen from corroding. The metal layer 21 and the second metal layer 23 cause the circuit layer 20 to fail.

Referring to FIG. 8, in a sixth embodiment of the display panel described in this application, the difference from the fifth embodiment is that the protective material of the first portion 31 is dispersed in the first frame body. The via hole 251 is protected to prevent corrosion of the via hole 251 by moisture and oxygen. It can be understood that, since the distance between the second portion 32 and the circuit layer 20 is much smaller than the distance between the first portion 31 and the circuit layer 20, in other implementations described in this embodiment, the The density of the protection material in the second frame gum body is greater than the density of the protection material in the first frame gum body, so as to achieve protection of the circuit layer 20.

The present application also provides a display device. The display device includes a controller and the display panel, and the controller controls the display panel to be turned on or off.

The above disclosure is only the preferred embodiments of this application, and of course, the scope of rights of this application cannot be limited by this. Those of ordinary skill in the art can understand all or part of the process of implementing the above embodiments and make according to the claims The equivalent changes still fall within the scope of the invention.

Claims

A display panel includes a display area and a non-display area surrounding the display area, wherein the non-display area of the display panel includes a base substrate, a circuit layer, and a frame adhesive, and the circuit layer is provided on the base substrate. The circuit layer includes a first surface remote from the base substrate and a side surface connected between the first surface and the base substrate, and the sealant includes at least partially covering the first surface A first part and a second part covering the side, the first part and the second part are connected to each other, and both the first part and the second part include a protective material for preventing water Oxygen invades the circuit layer;

The first part includes a first frame rubber body, and a protective material of the first portion is located on a surface of the first frame rubber body facing the second portion to form a first protective layer, or the first portion protective material Dispersed in the first frame gum body;

The circuit layer includes a first metal layer provided on a surface of the base substrate, a first insulating layer covering the first metal layer, and a first insulating layer provided on the first insulating layer away from a surface of the first metal layer. Two metal layers, a second insulating layer covering the second metal layer, and a conductive layer covering the first insulating layer and the second insulating layer, the conductive layer is in contact with the second metal layer through a via hole In a direction from the first metal layer to the second metal layer, the first portion covers the via hole.
The display panel according to claim 1, wherein the second portion comprises a second frame rubber body, the second frame rubber body and the first frame rubber body are connected to each other, and the protective material of the second portion is located at A contact surface between the second frame rubber body and the circuit layer forms a second protective layer, or the second portion of the protective material is dispersed in the second frame rubber body.
The display panel according to claim 2, wherein the first protective layer is located on a contact surface between the first frame adhesive body and the circuit layer, and the first protective layer and the second protective layer are formed A continuous protective layer for protecting the circuit layer.
The display panel according to claim 3, wherein the protective layer comprises a hydrophilic layer and a hydrophobic layer, the hydrophobic layer and the hydrophilic layer forming an alternately stacked multilayer structure, and the protective layer and the first layer A frame body, a layer in contact with the second frame body and the circuit layer are hydrophobic layers.
The display panel according to claim 1, wherein the first frame body includes a third surface facing the display area, and the first protective layer is located on the first surface and protrudes from the third surface.
The display panel of claim 5, wherein the first protective layer covers a first surface of the wiring layer.
The display panel according to claim 1, wherein a density of the protective material in the second frame rubber body is greater than a density of the protective material in the first frame rubber body.
A display panel includes a display area and a non-display area surrounding the display area, wherein the non-display area of the display panel includes a base substrate, a circuit layer, and a frame adhesive, and the circuit layer is provided on the base substrate. The circuit layer includes a first surface remote from the base substrate and a side surface connected between the first surface and the base substrate, and the sealant includes at least partially covering the first surface A first part and a second part covering the side, the first part and the second part are connected to each other, and both the first part and the second part include a protective material for preventing water Oxygen invades the circuit layer.
The display panel of claim 8, wherein the first portion comprises a first frame body, and a protective material of the first portion is formed on a surface of the first frame body facing the second portion to form a first protective layer. Or, the protective material of the first part is dispersed in the first frame gum body.
The display panel according to claim 9, wherein the second portion includes a second frame rubber body, the second frame rubber body and the first frame rubber body are connected to each other, and a protective material of the second portion is located at A contact surface between the second frame rubber body and the circuit layer forms a second protective layer, or the second portion of the protective material is dispersed in the second frame rubber body.
The display panel according to claim 8, wherein the circuit layer comprises a first metal layer provided on a surface of the base substrate, a first insulation layer covering the first metal layer, and the first insulation layer A second metal layer facing away from the surface of the first metal layer, a second insulating layer covering the second metal layer, and a conductive layer covering the first insulating layer and the second insulating layer, the conductive layer The first metal layer is in contact with the second metal layer through a via hole, and the first portion covers the via hole in a direction from the first metal layer to the second metal layer.
The display panel according to claim 10, wherein the first protective layer is located on a contact surface between the first frame adhesive body and the circuit layer, and the first protective layer and the second protective layer are formed A continuous protective layer for protecting the circuit layer.
The display panel according to claim 12, wherein the protective layer comprises a hydrophilic layer and a hydrophobic layer, and the hydrophobic layer and the hydrophilic layer form a multilayer structure that is alternately stacked, and the protective layer is in contact with the first layer. A frame body, a layer in contact with the second frame body and the circuit layer are hydrophobic layers.
The display panel according to claim 9, wherein the first frame body includes a third surface facing the display area, and the first protective layer is located on the first surface and protrudes from the third surface.
The display panel according to claim 14, wherein the first protective layer covers a first surface of the wiring layer.
The display panel according to claim 9, wherein a density of the protective material in the second frame body is greater than a density of the protective material in the first frame body.
A display device, wherein the display device includes a controller and the display panel according to claim 8, and the controller controls the display panel to be turned on or off.