CN111769080B

CN111769080B - Display panel

Info

Publication number: CN111769080B
Application number: CN202010590982.XA
Authority: CN
Inventors: 郝翠玉
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2022-07-12
Anticipated expiration: 2040-06-24
Also published as: CN111769080A

Abstract

The application provides a display panel, this display panel includes the display area and keeps away from the binding district of display area one side, is provided with first base plate in the binding district, is located the signal transmission layer on the first base plate and is located the adhesion enhancement layer between first base plate and the signal transmission layer, and the adhesion enhancement layer is used for increasing the adhesion between signal transmission layer and the first base plate. This application has increased the adhesion between signal transmission layer and the first base plate through the setting of adhesion enhancement layer, has reduced the separation of signal transmission layer and first base plate that the pulling force that produces because the processing procedure needs caused, has improved display panel's product quality.

Description

Display panel

Technical Field

The application relates to the field of display, in particular to a display panel.

Background

With the increasing demand of people on display panels, in the development of display panels tending to thin and full-screen, the improvement of the problems occurring in the development process is an important means for improving the quality of the display panels.

In the existing sensor of the display panel, such as a touch sensor, a signal transmission layer in a binding region is electrically connected with a source drain electrode metal layer on a substrate through direct contact of the metal layer, and the metal layer is easily influenced by tensile force of structures such as conductive adhesive and the like in a binding process due to weak binding force and poor adhesion performance between the metal layers, so that the metal layer is separated from the source drain electrode layer on the substrate, and the product quality of the display panel is influenced.

Therefore, a new display panel is needed to solve the above technical problems.

Disclosure of Invention

The application provides a display panel for solve the metal level direct contact on touch sensor's the metal level and the base plate in the current display panel binding region, because the adhesion between the metal level is weak to lead to binding the metal level readily releasable in the manufacturing procedure, influence display panel's product quality's problem.

In order to solve the technical problem, the technical scheme provided by the application is as follows:

the application provides a display panel, include the display area and keep away from the district of binding of display area one side, be provided with first base plate in the district of binding, be located signal transmission layer on the first base plate and being located first base plate with adhesion force enhancement layer between the signal transmission layer, the adhesion force enhancement layer is used for increasing signal transmission layer with adhesion force between the first base plate.

In the display panel provided by the present application, the first substrate at least includes a substrate, a first metal layer located on the substrate, and a planarization layer located on the first metal layer, the planarization layer includes a plurality of first openings, and the adhesion enhancing layer is located in the first openings;

the signal transmission layer comprises an insulating layer located on the flat layer and a second metal layer located on the insulating layer, the adhesion enhancement layer comprises a plurality of second openings, and the second metal layer is electrically connected with the first metal layer through the second openings.

In the display panel provided by the application, a plurality of first bulges and/or a plurality of first concaves are/is arranged on the first surface of the adhesion enhancement layer, which is in contact with the first metal layer;

the adhesion promotion layer is nested with the first metal layer by a plurality of the first protrusions and/or a plurality of the first concavities on the first surface.

In the display panel provided by the application, a plurality of second bulges and/or a plurality of second concaves are/is arranged on the second surface of the adhesion enhancement layer, which is in contact with the second metal layer;

the adhesion promotion layer is nested with the second metal layer by a plurality of the second protrusions and/or a plurality of the second concavities on the second surface.

In the display panel provided by the present application, the adhesion enhancing layer and the planarization layer or the insulating layer are disposed on the same layer.

In the display panel provided by the present application, the first substrate further includes a non-metal layer located between the substrate and the first metal layer;

the first metal layer includes a third opening corresponding to the adhesion enhancing layer, and the adhesion enhancing layer is in contact with the non-metal layer through the third opening.

In the display panel provided by the application, the adhesion enhancement layer and the non-metal layer are clamped or bonded.

In the display panel provided by the application, the adhesion enhancement layer and the nonmetal layer are integrally arranged.

In the display panel provided by the present application, the material of the adhesion enhancing layer includes at least one of an inorganic non-metallic material or an organic material.

In the display panel provided by the application, the material of the adhesion enhancement layer is a sticky material, and the sticky material comprises propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax and trichloromethane.

Has the advantages that: this application has increased the adhesion between signal transmission layer and the first base plate through the setting of adhesion enhancement layer, has reduced the separation of signal transmission layer and first base plate that the pulling force that produces because the processing procedure needs caused, has improved display panel's product quality.

Drawings

The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a first structural diagram of a bonding region of a display panel according to the present application.

Fig. 2 is a second structural diagram of a bonding area of a display panel according to the present application.

Fig. 3 is a third structural diagram of a bonding area of a display panel according to the present application.

Fig. 4 is a fourth structural diagram of a bonding region of a display panel according to the present application.

Fig. 5 is a fifth structural diagram of a bonding area of a display panel according to the present application.

Fig. 6 is a sixth structural diagram of a bonding area of a display panel according to the present application.

Detailed Description

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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. 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 application.

In the description of the present application, 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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. 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. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

In the existing display panel, because the metal layer in the signal transmission layer of the sensor, such as a touch sensor, is in contact with the metal layer of the substrate to generate electrical connection in the binding region, and the adhesion force between the metal layers is weak, the signal transmission layer and the substrate are easily separated from each other in the tensile force generated by the process, so that the product quality of the display panel is affected. Based on this, the present application proposes a display panel.

Referring to fig. 1 to 6, the display panel includes a display area and a bonding area 100 on a side away from the display area, a first substrate 101, a signal transmission layer 102 on the first substrate 101, and an adhesion enhancement layer 103 between the first substrate 101 and the signal transmission layer 102 are disposed in the bonding area 100, and the adhesion enhancement layer 103 is used for increasing adhesion between the signal transmission layer 102 and the first substrate 101.

In this embodiment, the display panel may be a liquid crystal display panel, an OLED display panel, or another type of display panel, and is not limited herein.

In this embodiment, the first substrate 101 may be an array substrate or other types of substrates.

In this embodiment, the signal transmission layer 102 may be a signal transmission layer 102 of a sensor, such as the signal transmission layer 102 of a touch sensor, for signal transmission.

According to the display panel, the adhesion force between the signal transmission layer 102 and the first substrate 101 is increased through the arrangement of the adhesion force enhancement layer 103, the separation of the signal transmission layer 102 and the first substrate 101 caused by the pulling force generated by the process requirement is reduced, and the product quality of the display panel is improved.

The technical solution of the present application will now be described with reference to specific embodiments.

Example one

Referring to fig. 1, the first substrate 101 at least includes a substrate 104, a first metal layer 105 on the substrate 104, and a planarization layer 106 on the first metal layer 105, wherein the planarization layer 106 includes a plurality of first openings 109, and the adhesion enhancing layer 103 is located in the first openings 109.

The signal transmission layer 102 includes an insulating layer 107 on the planarization layer 106 and a second metal layer 108 on the insulating layer 107, the adhesion enhancement layer 103 includes a plurality of second openings 110, and the second metal layer 108 is electrically connected to the first metal layer 105 through the second openings 110.

In this embodiment, the substrate 104 may be a rigid substrate or a flexible substrate. When the substrate 104 is a rigid substrate, the substrate 104 may be made of glass, quartz, or the like. When the substrate 104 is a flexible substrate, the substrate 104 may be polyimide or the like.

In this embodiment, when the first substrate 101 is an array substrate, the first metal layer 105 may be a source/drain layer.

In this embodiment, the material of the planarization layer 106 may be an organic insulating material.

In this embodiment, the material of the insulating layer 107 may be an inorganic insulating material, and when the material of the insulating layer 107 is an inorganic insulating material, the material of the insulating layer 107 may be silicon nitride, silicon oxide, silicon oxynitride, or other insulating inorganic materials, which is not limited herein.

In this embodiment, the adhesion enhancing layer 103 may be in contact with the planarization layer 106 and/or the insulating layer 107, or may be separately disposed in the first opening 109.

In this embodiment, the material of the adhesion promotion layer 103 may include at least one of an inorganic non-metallic material or an organic material.

The interlayer bonding force between the first metal layer 105 and the second metal layer 108 is weak, the adhesion performance is poor, the adhesion force enhancing layer 103 made of at least one of inorganic non-metal materials or organic materials is arranged in the first opening 109, the adhesion force between the inorganic non-metal materials or organic materials and the metal materials is larger than that between the metal layers, and the adhesion force between the signal transmission layer 102 and the first substrate 101 is increased through the contact between the first metal layer 105 and the adhesion force enhancing layer 103 and the contact between the second metal layer 108 and the adhesion force enhancing layer 103.

In the embodiment, the adhesion enhancing layer 103 is disposed in the first opening 109, so that the adhesion between the signal transmission layer 102 and the first substrate 101 is increased, the separation of the first metal layer 105 and the second metal layer 108 caused by the pulling force generated by the process requirement is reduced, and the product quality of the display panel is improved.

Example two

Referring to fig. 2 and fig. 3, the present embodiment is the same as or similar to the first embodiment, except that:

referring to fig. 2, in the present embodiment, a plurality of first protrusions and/or a plurality of first concave surfaces are disposed on a first surface of the adhesion enhancement layer 103, which is in contact with the first metal layer 105.

The adhesion promoting layer 103 is nested with the first metal layer 105 by a plurality of the first protrusions and/or a plurality of the first concavities on the first surface.

The first surface is any surface in contact with the first metal layer 105, and the adhesion enhancing layer 103 increases the contact area between the adhesion enhancing layer 103 and the first metal layer 105 by the nested arrangement of the first protrusions and/or the first concavities and the first metal layer 105, thereby increasing the adhesion between the adhesion enhancing layer 103 and the first metal layer 105.

Referring to fig. 3, in the present embodiment, a plurality of second protrusions and/or a plurality of second concave surfaces are disposed on a second surface of the adhesion enhancement layer 103, which is in contact with the second metal layer 108.

The adhesion promoting layer 103 is nested with the second metal layer 108 by a plurality of the second protrusions and/or a plurality of the second concavities on the second surface.

The second surface is any surface in contact with the second metal layer 108, and the adhesion enhancement layer 103 increases the contact area between the adhesion enhancement layer 103 and the second metal layer 108 by the nested arrangement of the second protrusions and/or the second concavities and the second metal layer 108, thereby increasing the adhesion between the adhesion enhancement layer 103 and the second metal layer 108.

In this embodiment, the adhesion promoting layer 103 may be nested with the first metal layer 105 and the second metal layer 108 simultaneously by the first protrusion and/or the first concave surface and the second protrusion and/or the second concave surface.

In this embodiment, by nesting the adhesion enhancement layer 103 with the first metal layer 105 and/or the second metal layer 108, the contact area between the adhesion enhancement layer 103 and the first metal layer 105 and/or the second metal layer 108 is increased, the adhesion between the signal transmission layer 102 and the first substrate 101 is further increased, the separation between the first metal layer 105 and the second metal layer 108 caused by the pulling force generated by the manufacturing process is reduced, and the product quality of the display panel is improved.

EXAMPLE III

Referring to fig. 4 and 5, the present embodiment is the same as or similar to the first embodiment and the second embodiment, except that:

the adhesion enhancing layer 103 is disposed in the same layer as the planarization layer 106 or the insulating layer 107.

In this embodiment, the adhesion enhancing layer 103 can be formed of the same material and in the same process as the planarization layer 106,

in this embodiment, the adhesion enhancing layer 103 may be formed of the same material and in the same process as the insulating layer 107.

In this embodiment, the adhesion enhancement layer 103 and the planarization layer 106 or the insulating layer 107 are disposed on the same layer, so that the adhesion enhancement layer and the planarization layer 106 or the insulating layer 107 can be formed in the same material and in the same process, thereby simplifying the formation process of the display panel; in addition, by disposing the adhesion enhancing layer 103 in the first opening 109, the adhesion between the signal transmission layer 102 and the first substrate 101 is increased, the separation of the first metal layer 105 and the second metal layer 108 caused by the pulling force generated by the process requirements is reduced, and the product quality of the display panel is improved.

Example four

Referring to fig. 6, the present embodiment is the same as or similar to the above embodiments, except that:

the first substrate 101 further comprises a non-metal layer 112 between the substrate 104 and the first metal layer 105.

The first metal layer 105 includes a third opening 111 corresponding to the adhesion enhancement layer 103, and the adhesion enhancement layer 103 is in contact with the nonmetal layer 112 through the third opening 111.

When the adhesion enhancing layer 103 is in contact with the nonmetal layer 112 through the third opening 111, the adhesion generated between the adhesion enhancing layer 103 and the nonmetal layer 112 increases the adhesion between the adhesion enhancing layer 103 and the first substrate 101; meanwhile, the existence of the third opening 111 increases the contact area between the adhesion enhancement layer 103 and the first metal layer 105, so that the adhesion between the adhesion enhancement layer 103 and the first metal layer 105 is increased, which is beneficial to increasing the adhesion between the signal transmission layer 102 and the first substrate 101; in addition, since the adhesion enhancing layer 103 is in contact with the non-metal layer 112 through the third opening 111, and the third opening 111 is located on the first metal layer 105, when the first metal layer 105 is bent or bent due to a manufacturing process to cause a crack, the adhesion enhancing layer 103 can play a role of blocking, which is beneficial to improving the product quality of the display panel.

In this embodiment, the adhesion enhancing layer 103 may be disposed in a snap fit or an adhesive with the non-metal layer 112.

In this embodiment, the adhesion enhancing layer 103 may be integrally provided with the non-metal layer 112.

In this embodiment, when the adhesion enhancing layer 103 is fastened or adhered to the non-metal layer 112, the firmness of the bonding between the adhesion enhancing layer 103 and the first substrate 101 is enhanced, which is beneficial to preventing the adhesion enhancing layer 103 from separating from the first substrate 101 in the pulling force generated by the manufacturing process, and further reducing the separation of the first metal layer 105 and the second metal layer 108 caused by the pulling force generated by the manufacturing process, thereby being beneficial to improving the product quality of the display panel.

Similarly, in the embodiment, when the adhesion enhancement layer 103 and the non-metal layer 112 are integrally disposed, the adhesion enhancement layer 103 itself is prevented from being separated from the first substrate 101 in the tensile force generated by the manufacturing process, so as to further reduce the separation of the first metal layer 105 and the second metal layer 108 caused by the tensile force generated due to the manufacturing process requirement, which is beneficial to improving the product quality of the display panel.

In this embodiment, when the adhesion enhancement layer 103 is integrally disposed with the non-metal layer 112, the adhesion enhancement layer 103 may be formed by the same material and the same process as the non-metal layer 112, that is, the adhesion enhancement layer 103 is formed at the same time as the non-metal layer 112.

In this embodiment, by the arrangement of the third opening 111, the adhesion enhancement layer 103 is in contact with the non-metal layer 112 on the first substrate 101 through the third opening 111, which is beneficial to enhancing the firmness between the adhesion enhancement layer 103 and the first substrate 101, increasing the adhesion between the signal transmission layer 102 and the first substrate 101, reducing the separation of the first metal layer 105 and the second metal layer 108 caused by the pulling force generated due to the manufacturing process requirements, and improving the product quality of the display panel.

In the first, second, and fourth embodiments, the material of the adhesion enhancing layer 103 may be a sticky material, for example, the sticky material may be a conductive adhesive or other sticky materials, and is not limited herein. When the adhesive material is a conductive adhesive, the conductive material in the conductive adhesive may be a conductive metal material such as gold or silver, or may also be a conductive alloy material or a conductive non-metal material such as graphene, which is not limited specifically herein.

The adhesive material may include propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, and chloroform. The propylene glycol methyl ether acetate is a solvent and can be used for dissolving other substances in the viscous material. In the preparation process of the viscous material, the added contents are as follows in percentage by mass: 54% propylene glycol methyl ether acetate, 23% polyisobutylene, 18% butyl rubber, 3% microcrystalline wax, and 2% chloroform. During the preparation process of the viscous material, the solvent of the viscous material, namely the propylene glycol methyl ether acetate, can be separated out through reduced pressure drying, and the final residual propylene glycol methyl ether acetate accounts for less than 10% of the original mass fraction. The viscous material formed in this way can reduce energy loss and difficulty caused by a drying process of the viscous material, and properly increase flexibility of the viscous material, thereby being beneficial to reducing stress on the adhesion enhancing layer 103 when the manufacturing process of the display panel needs to be bent or bent. In addition, when the adhesion enhancing layer 103 is made of a sticky material, since the adhesion enhancing layer 103 has a sticky property, the adhesion between the adhesion enhancing layer 103 and the first metal layer 105 and between the adhesion enhancing layer and the second metal layer 108 is further increased, which is beneficial to reducing the separation of the first metal layer 105 and the second metal layer caused by the pulling force generated by the manufacturing process requirements, and improving the product quality of the display panel.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The display panel provided by the embodiment of the present application is described in detail above, and a specific example is applied to illustrate the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the technical solution and the core idea of the present application; 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; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A display panel is characterized by comprising a display area and a binding area far away from one side of the display area, wherein a first substrate, a signal transmission layer positioned on the first substrate and an adhesion enhancement layer positioned between the first substrate and the signal transmission layer are arranged in the binding area, and the adhesion enhancement layer is used for increasing the adhesion between the signal transmission layer and the first substrate;

the first substrate at least comprises a substrate, a first metal layer positioned on the substrate and a flat layer positioned on the first metal layer, wherein the flat layer comprises a plurality of first openings, and the adhesion enhancement layer is positioned in the first openings;

the signal transmission layer comprises an insulating layer positioned on the flat layer and a second metal layer positioned on the insulating layer, the adhesion enhancement layer comprises a plurality of second openings, and the second metal layer is electrically connected with the first metal layer through the second openings;

the first base plate further comprises a non-metal layer located between the substrate and the first metal layer;

2. The display panel of claim 1, wherein the adhesion enhancing layer is disposed in a snap fit or adhesive with the non-metallic layer.

3. The display panel of claim 1, wherein the adhesion enhancing layer is integral with the non-metallic layer.

4. The display panel of claim 1, wherein the material of the adhesion promotion layer comprises at least one of an inorganic non-metallic material or an organic material.

5. The display panel according to claim 4, wherein the material of the adhesion enhancing layer is a tacky material comprising propylene glycol methyl ether acetate, polyisobutylene, butyl rubber, microcrystalline wax, and chloroform.