WO2020093493A1

WO2020093493A1 - Display panel and display device

Info

Publication number: WO2020093493A1
Application number: PCT/CN2018/118429
Authority: WO
Inventors: 刘忠念
Original assignee: 惠科股份有限公司
Priority date: 2018-11-06
Filing date: 2018-11-30
Publication date: 2020-05-14
Also published as: CN209570779U

Abstract

A display panel (100) and a display device (200). The display panel (100) comprises a first substrate (130), a second substrate (140), a common electrode layer (131) and a frame sealant (150). The second substrate (140) and the first substrate (130) are arranged opposite to each other. The common electrode layer (131) is provided at the first substrate (130), and comprises a first sub-common electrode layer (132). The frame sealant (150) is provided at a non-display region (120) of the first substrate (130), and is arranged around a display region (110) of the first substrate (130) to form a sealed region (180). The first sub-common electrode layer (132) is provided in the sealed region (180).

Description

Display panel and display device

This application requires the priority of the Chinese patent application filed on November 6, 2018 with the application number CN201821830214.1, and the application name is "a display panel and display device", the entire contents of which are incorporated herein by reference. Applying.

Technical field

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

Background technique

It should be understood that the statements herein only provide background information related to the present application and do not necessarily constitute prior art.

The liquid crystal display has many advantages such as thin body, power saving, no radiation, etc., and has been widely used. Most of the liquid crystal displays on the existing market are backlight type liquid crystal displays, which include a liquid crystal panel and a backlight module (Backlight Module). The working principle of the liquid crystal panel is to place liquid crystal molecules in two parallel glass substrates, and apply a driving voltage on the two glass substrates to control the rotation direction of the liquid crystal molecules, so as to refract the light of the backlight module to generate a picture. In the energized state, the common electrode layer has a potential difference from the outside.

The addition of moisture to the common electrode layer provides a solvent environment and participates in chemical reactions, which is extremely susceptible to corrosion. In severe cases, the common electrode layer on the color filter substrate will corrode from the periphery of the display area into the display area, causing panel display defects.

Application content

To achieve the above object, the present application provides a display panel and a display device so as not to be easily corroded.

The application also discloses a display panel. The display panel includes: a first substrate, a second substrate, a sealant and a common electrode layer, the second substrate is disposed opposite to the first substrate, the common electrode layer is disposed on the first substrate, the common electrode layer includes a first sub The common electrode layer and the sealant are disposed in the non-display area of the first substrate, wherein the sealant surrounds a sealing area along the display area, and the first sub-common electrode layer is disposed in the sealing area.

Optionally, the edge of the first sub-common electrode layer is provided in the area of the sealant, and at least a portion of the sealant is provided with the first sub-common electrode layer, away from the side of the display area.

Optionally, the common electrode layer further includes a second sub-common electrode layer, and the second sub-common electrode layer is outside the sealing area.

Optionally, the first substrate includes a first side and a second side, the first side and the second side are connected at one end and are perpendicular to each other, the first side is larger than the second side, and the second sub The common electrode layer is provided along the second side.

Optionally, the first substrate includes a first side and a second side, the first side and the second side are connected at one end and are perpendicular to each other, the first side is larger than the second side, and the second sub The common electrode layer is provided along the first side.

Optionally, the edge of the first sub-common electrode layer is disposed between the sealant and the display area.

Optionally, the second substrate includes a second substrate; a metal layer disposed on the non-display area on the second substrate; the sealant is correspondingly disposed above the metal layer; a protective layer; covering the sealing area The outer metal layer.

Optionally, the first substrate includes a first substrate, a black matrix, a common electrode layer and a first alignment layer; a black matrix is provided on the first substrate; a common electrode layer covers the display area and the black matrix The common electrode layer includes a first sub-common electrode layer and a second sub-common electrode layer; a first alignment layer covers the first sub-common electrode layer; a second substrate includes a second substrate; a metal layer, provided In the non-display area on the second substrate; the sealant is correspondingly disposed above the metal layer; the protective layer; the metal layer covering the sealing area; the pixel electrode layer, covering the display area on the second substrate Inside; a second alignment layer covering the pixel electrode layer and the metal layer; the display panel further includes a liquid crystal layer; the liquid crystal layer is disposed between the first alignment layer and the second alignment layer.

Optionally, the first substrate is a color filter substrate, and the second substrate is an array substrate.

Optionally, the metal layer includes a gate electrode.

Optionally, the metal layer includes a common electrode.

Optionally, the protective layer includes taffeta.

The application also discloses a display panel. The display panel includes a first substrate, a second substrate, a sealant, and a transparent electrode layer. The second substrate is disposed opposite to the first substrate. The sealant is disposed in the non-display area of the first substrate. The common electrode layer is disposed in the first On a substrate, the common electrode layer includes a first sub-common electrode layer, the edge of the first sub-common electrode layer is disposed within a frame glue, and the second substrate includes a second substrate, a metal layer and a protective layer, the metal layer , Disposed in the non-display area on the second substrate, the sealant is correspondingly disposed above the metal layer, a protective layer; covering the metal layer outside the sealing area.

Optionally, the protective layer covers the second sub-common electrode layer.

The application also discloses a display device. The display device includes a display panel, and the display panel includes:

First substrate

A second substrate, which is opposite to the first substrate;

A common electrode layer disposed on the first substrate, the common electrode layer includes a first sub-common electrode layer, and

The frame glue is provided in the non-display area of the first substrate;

Wherein, the sealant surrounds a sealing area along the display area of the first substrate; the first sub-common electrode layer is disposed in the sealing area.

Optionally, the common electrode layer further includes a second sub-common electrode layer, and the second sub-common electrode layer is disposed outside the sealing area.

Optionally, the first substrate and the second substrate are made of glass material.

Optionally, the edge of the first sub-common electrode layer is disposed in the area of the sealant and does not exceed the edge of the sealant.

Relative to the common electrode layer directly contacting with the external water vapor and cleaning agent to participate in a chemical reaction, resulting in electrode corrosion or corrosion into the display area, which causes panel display defects. For the solution of this application, the first sub-common electrode layer is provided in In the sealed area, there is no environmental contact with the surrounding moisture to provide the solvent, which improves the anti-corrosion performance of the panel.

BRIEF DESCRIPTION

The included drawings are used to provide a further understanding of the embodiments of the present application, which form part of the specification, exemplify the implementation of the present application, and explain the principles of the present application together with the textual description. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without paying creative labor, other drawings can also be obtained based on these drawings. In the drawings:

1 is a cross-sectional view of a display panel according to one embodiment of the present application;

2 is a top view of a display panel according to one embodiment of the present application;

3 is a cross-sectional view of a display panel according to one embodiment of the present application;

4 is a cross-sectional view of a display panel according to one embodiment of the present application;

5 is a method diagram of a display panel according to one embodiment of the present application;

6 is a schematic diagram of a display device according to one embodiment of the present application.

detailed description

It should be understood that the terminology, specific structural and functional details disclosed here are only for describing specific embodiments and are representative, but this application can be implemented in many alternative forms and should not be interpreted as only Limited to the embodiments set forth herein.

In the description of this application, the terms "first" and "second" only describe the purpose, and cannot be understood as indicating relative importance, or implicitly indicating the number of technical features indicated. Thus, unless otherwise stated, the features defined as "first" and "second" may expressly or implicitly include one or more of the features; "multiple" means two or more. The term "comprising" and any variations thereof are meant to be non-exclusive and one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

In addition, "center", "landscape", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" The terms such as the indicated orientation or positional relationship are described based on the orientation or relative positional relationship shown in the drawings, only for the convenience of describing the simplified description of this application, rather than indicating that the device or element referred to must have a specific orientation It is constructed and operated in a specific orientation, so it cannot be understood as a limitation to this application.

In addition, unless otherwise clearly specified and defined, the terms "installation", "connected", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection It can also be an electrical connection; it can be directly connected, indirectly connected through an intermediary, or connected within two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The application will be described below with reference to the drawings and embodiments.

As shown in FIG. 1, an embodiment of the present application discloses a display panel 100. The display panel 100 includes: a first substrate 130, a second substrate 140, a sealant 150, and a common electrode layer 131; the second substrate 140 is disposed opposite to the first substrate 130; the common electrode layer 131 is disposed on the first substrate 130; the common electrode The layer includes a first sub-common electrode layer 132; a sealant 150 is provided in the non-display area 120 of the first substrate 130; a sealant 150 surrounds the display area 110 to provide a sealing area 180; a first sub-common electrode layer 132 is provided in the sealing area 180 Inside.

The sealant 150 seals the first substrate 130 and the second substrate 140, where the first substrate 130 is a color filter substrate, the second substrate 140 is an array substrate, and is made of glass material, and the common electrode layer outside the sealant 150 leaks In the air, in the process of using the liquid crystal panel, it is easy to contact with water vapor or cleaning agent. Under the energized state, the common electrode layer has a potential difference with the outside world. With the addition of moisture to provide a solvent environment and participate in chemical reactions, electrode corrosion is prone to occur. In severe cases, the common electrode layer on the color filter substrate will be peripheral to the display area 110 Corrosion into the display area 110 causes panel display defects. In this application, the first sub-common electrode layer 132 is provided in the sealing area 180, and does not contact the surrounding water to provide a solvent environment to improve the anti-corrosion performance of the panel.

As shown in FIG. 1, in an embodiment, the edge of the first sub-common electrode layer 132 is disposed in the area of the frame glue 150, and at least a portion of the frame glue 150 is provided with the first sub-common electrode layer 132 away from the display area 110 Side. The edge of the first sub-common electrode layer 132 is disposed in the sealant 150. The edge of the first sub-common electrode layer 132 is disposed in the sealant 150. There is no channel for the alignment liquid between the sealant 150 and the display area 110, which can block the penetration of the alignment liquid into the black matrix 135 and affect the display effect.

Of course, the edge of the first sub-common electrode layer 132 is within the sealant and does not exceed the edge of the sealant 150, which means that it can coincide with the edge of the sealant 150, the contact area with the outside world is small, and the corrosion area becomes smaller. The destructiveness is less than the exemplary one.

As shown in FIGS. 1 to 2, as another embodiment of the present application, a display panel is disclosed. The display panel 100 includes: a first substrate 130, a second substrate 140, a sealant 150, and a common electrode layer; a second substrate 140 is disposed opposite to the first substrate 130; the sealant 150 is disposed on the non-display area 120 of the first substrate 130; the common electrode layer is disposed on the first substrate 130; the common electrode layer includes the first sub common electrode layer 132; The edge of a sub-common electrode layer 132 is disposed within the sealant 150; the second substrate 140 includes a second substrate 141, a metal layer 143, and a protective layer 170; the metal layer 143 is disposed on the non-display area on the second substrate 141 Within 120; the sealant 150 is correspondingly disposed on the side of the metal layer 143; the protective layer 170; and the metal layer 143 covering the outside of the sealing area 180. The common electrode layer is divided into two, the edge of the first sub-common electrode layer 132 falls within the frame glue 150, the edge is sealed by the frame glue 150, when the alignment liquid comes out in the early stage of the alignment layer, it will not follow the sub-common electrode The channel provided by the layer and the sealant 150 overflows or penetrates into other areas, resulting in display defects. This phenomenon is avoided in the sealant 150.

As shown in FIGS. 2 to 3, in an embodiment, the common electrode layer further includes a second sub-common electrode layer 133 that is outside the sealing area 180. The two sub-common electrode layers are on the same horizontal line, the width W1 between the two sub-common electrode layers is 30-200um, and there is a width between the second sub-common electrode layer 133 and the first sub-common electrode layer 132, so that the first sub-common electrode layer A cross-section is provided between the electrode layer 132 and the second sub-common electrode layer 133. If the second sub-common electrode layer 133 is corroded, it will not adhere to the first sub-common electrode layer 132 for corrosion. The width range guarantees a safe distance. The set path is L1, and L1 is surrounded by the sealing area of the sealant 150 to fully isolate and avoid corrosion.

As shown in FIG. 3, in an embodiment, the first substrate 130 includes a first side and a second side. The first side and the second side are connected at one end and are perpendicular to each other. The first side is larger than the second side. The sub-common electrode layer 133 is arranged along the second side, the first side is C1, the second side is C2, one of the first sub-common electrode layer and the second sub-common electrode layer, one is in the sealed area, and the other is provided along the second side, Intermittent break.

The way of partitioning is realized by laser cutting process. The longer the cutting path is, the longer it takes. In order to balance the productivity and the anti-corrosion effect, the second side of the color film substrate can be selected. Sometimes, the screen will be wiped with cleaning fluid, which will cause the common electrode layer on the second side to corrode, so you can only cut the common electrode layer on the second side.

The difference between this embodiment and the previous embodiment is that the second sub-common electrode layer 133 is disposed along the first side. The first sub-common electrode layer and the second sub-common electrode layer, one in the sealed area, one is provided along the second side, and is spaced apart in the middle.

The way of partitioning is realized by laser cutting process. The longer the cutting path, the longer the time. Wide area and high efficiency of anti-corrosion. In the process of using the display at home, sometimes the screen will be wiped with cleaning liquid, the cleaning liquid flowing down will cause the common electrode layer on the first side to corrode, so only the common electrode on the first side can be cut Floor.

As shown in FIG. 3, in an embodiment, the first substrate 130 includes a first substrate 134, a black matrix, a common electrode layer, and a first alignment layer 136; the black matrix 135 is disposed on the first substrate 134; the common An electrode layer covering the display area 110 and the black matrix 135; a common electrode layer including a first sub-common electrode layer 132 and a second sub-common electrode layer 133; a first alignment layer 136 covering the first sub-common electrode layer 132 The second substrate 140 includes a second substrate 141; a metal layer 143 disposed in the non-display area 120 on the second substrate 141; a sealant 150 correspondingly disposed above the metal layer 143; a protective layer 170; covering the sealing area A metal layer 143 outside 180; a pixel electrode layer 142 covering the display area 110 on the second substrate 141; a second alignment layer 144 covering the pixel electrode layer 142 and the metal layer 143; the display panel 100 further includes liquid crystal Layer 160; the liquid crystal layer 160 is disposed between the first alignment layer 136 and the second alignment layer 144.

The first substrate 134 and the second substrate 141 may be made of glass material, the common electrode layer 133 may be made of indium tin oxide material, the metal layer is the first metal layer, and a gate electrode, a common electrode, etc. are generally provided.

In this solution, the black matrix 135 is disposed on the first substrate 134 to shield the light and ensure no light leakage. The first sub-common electrode layer 132 and the second sub-common electrode layer 133 are provided with cross sections to cut off the corrosion path. The metal layer 143 is connected to the pixel electrode layer 142 on the array substrate, so that the array substrate and the color filter substrate can be connected, the liquid crystal layer 160 provides liquid crystal to ensure the display quality, the frame glue 150 connects the upper and lower substrates, and the protective layer 170 is tuffy The adhesive seals and isolates the metal layer 143 from contact with external moisture, and is easily corroded to form a metal oxide, which affects the conduction performance of the metal layer 143.

As shown in FIG. 4, in an embodiment, the edge of the first sub-common electrode layer 132 is disposed between the sealant 150 and the display area 110. The edge of the first common electrode layer is located between the frame glue 150 and the display area 110. The frame glue 150 isolates the environment from the surrounding moisture to provide a solvent. The common electrode layer does not participate in chemical reactions and is not prone to corrosion, ensuring display. The yield of the panel.

As shown in FIG. 4, in an embodiment, the second substrate 140 includes a second substrate 141 and a metal layer, which are disposed in the non-display area 120 on the second substrate 141, and the sealant 150 is correspondingly disposed on the metal layer 143 Above; the protective layer 170, covering the metal layer 143 outside the sealing area 180, the protective layer 170 is provided on the metal layer 143 outside the sealing area 180, the protective layer 170 is a tower non-adhesive, sealing and isolating chemical reaction with external moisture, to the first The metal layer 143 of the second substrate 140 is corroded, resulting in poor conduction and display defects.

Of course, the protective layer 170 may also cover the second sub-common electrode layer 133 to directly prevent the sub-common electrode layer from contacting with the outside world, generating oxides and affecting conduction.

As shown in FIG. 5, the process of shrinking the first sub-common electrode layer into the sealed area is:

S51: Adjust the transmittance of the mask plate;

S52: Expose the common electrode layer outside the sealed area;

S53: The first sub-common electrode layer is obtained after development.

As shown in FIG. 6, as another embodiment of the present application, a display device 200 is disclosed. The display device 200 includes the above-mentioned display panel 100.

The technical solution of this application can be widely used in various display panels, such as TN-type display panel (full name Twisted Nematic, namely twisted nematic panel), IPS-type display panel (In-Plane Switching), VA-type display panel ( Multi-domain Vertica Alignment (multi-quadrant vertical alignment technology), of course, can also be other types of display panels, such as organic light emitting display panel (organic light emitting diode, OLED display panel for short), all of which can apply the above scheme.

The above content is a detailed description of this application in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of this application is limited to these descriptions. For a person of ordinary skill in the technical field to which this application belongs, without departing from the concept of this application, several simple deductions or replacements can be made, all of which should be considered as falling within the protection scope of this application.

Claims

A display panel, including:

First substrate

A second substrate, which is opposite to the first substrate;

A common electrode layer provided on the first substrate, the common electrode layer including a first sub-common electrode layer; and

A sealant is provided in the non-display area of the first substrate, and the sealant surrounds a display area along the display area of the first substrate;

Wherein, the first sub-common electrode layer is disposed in the sealing area.
The display panel according to claim 1, wherein an edge of the first sub-common electrode layer is disposed in an area of the sealant, and at least a portion of the sealant is provided with the first sub-common electrode Layer, away from the display area.
The display panel of claim 1, wherein the common electrode layer further comprises a second sub-common electrode layer, and the second sub-common electrode layer is disposed outside the sealing area.
A display panel according to claim 1, wherein the width between the two sub-common electrode layers is in the range of 30-200um.
The display panel according to claim 3, wherein the first substrate includes a first side and a second side, the first side and the second side are connected at one end, and are perpendicular to each other, and the first side Is longer than the length of the second side, and the second sub-common electrode layer is disposed along the second side.
The display panel according to claim 3, wherein the first substrate includes a first side and a second side, the first side and the second side are connected at one end, and are perpendicular to each other, and the first side Is longer than the length of the second side, and the second sub-common electrode layer is disposed along the first side.
The display panel according to claim 1, wherein the edge of the first sub-common electrode layer is disposed between the sealant and the display area.
The display panel of claim 1, wherein the second substrate comprises:

Second substrate

A metal layer disposed in the non-display area on the second substrate;

A protective layer covering the metal layer outside the sealed area;

The sealant is correspondingly disposed above the metal layer.
The display panel of claim 1, wherein the first substrate comprises:

First substrate

A black matrix, arranged on the first substrate;

A common electrode layer covering the display area and the black matrix, the common electrode layer including a first sub-common electrode layer and a second sub-common electrode layer;

A first alignment layer covering the first sub-common electrode layer;

The second substrate includes:

Second substrate

A metal layer disposed in the non-display area on the second substrate;

The sealant is correspondingly arranged above the metal layer;

A protective layer covering the metal layer outside the sealed area;

A pixel electrode layer covering the display area on the second substrate;

A second alignment layer covering the pixel electrode layer and the first sub-common electrode layer;

The display panel further includes a liquid crystal layer;

The liquid crystal layer is disposed between the first alignment layer and the second alignment layer.
A display panel according to claim 1, wherein the first substrate is a color filter substrate, and the second substrate is an array substrate.
The display panel of claim 1, wherein the metal layer includes a gate electrode.
The display panel of claim 1, wherein the metal layer includes a common electrode.
A display panel as claimed in claim 1, wherein the protective layer comprises taffeta.
A display panel including:

First substrate

A second substrate, which is opposite to the first substrate;

The frame glue is provided in the non-display area of the first substrate;

A common electrode layer is provided on the first substrate, and the common electrode layer includes a first sub-common electrode layer;

The edge of the first sub-common electrode layer is set in the frame glue;

The second substrate includes a second substrate;

A metal layer disposed in the non-display area on the second substrate;

The sealant is also correspondingly arranged above the metal layer;

The protective layer covers the metal layer outside the sealed area.
A display device as claimed in claim 14, wherein the protective layer covers the second sub-common electrode layer.
A display device includes a display panel, and the display panel includes:

First substrate

A second substrate, which is opposite to the first substrate;

A common electrode layer provided on the first substrate, the common electrode layer including a first sub-common electrode layer; and

A sealant is provided in the non-display area of the first substrate, wherein the sealant surrounds a sealing area along the display area of the first substrate;

The first sub-common electrode layer is disposed in the sealing area.
A display device according to claim 16, wherein the edge of the first sub-common electrode layer is disposed in the area of the sealant, and at least a portion of the sealant is provided with the first sub-common electrode Layer, away from the display area.
A display device according to claim 16, wherein the common electrode layer further includes a second sub-common electrode layer, the second sub-common electrode layer being disposed outside the sealing area.
A display device according to claim 16, wherein the first substrate and the second substrate are made of glass material.
A display device as claimed in claim 16, wherein the edge of the first sub-common electrode layer is disposed in the area of the sealant and does not exceed the edge of the sealant.