CN111312794A

CN111312794A - Display device

Info

Publication number: CN111312794A
Application number: CN202010253753.9A
Authority: CN
Inventors: 李晓康
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-06-19

Abstract

The present invention provides a display device including: the display panel comprises a supporting layer, a first adhesive layer, a display panel, a fourth adhesive layer and cover glass. Through being the sandwich structure with the supporting layer design, the supporting layer includes at least two-layer sheetmetal and presss from both sides and establishes second glue film between the two-layer sheetmetal, simultaneously two-layer sheetmetal all digs the hole and fills the third glue film for the supporting layer has higher bond strength when having better curling performance, and then effectively prevents to buckle in-process glue film and drops. Meanwhile, the display panel has better supporting performance and integrates flexibility and rigidity.

Description

Display device

Technical Field

The invention relates to the technical field of display, in particular to a display device.

Background

In the prior art, an Active Matrix Organic Light Emitting Diode (AMOLED) is expected to replace liquid crystal as the mainstream choice of next generation displays due to the characteristics of high contrast, wide viewing angle, fast response speed, flexibility and the like.

At present, the problem of glue peeling of the bendable flexible panel in the bending test process is solved, namely, the back plate and the metal sheet of the panel are separated, so that the poor screen separation is caused after the mobile phone is made into a finished product, and the requirements of customers cannot be met. As shown in fig. 1, the reason for the failure is that, on one hand, the adhesive force between the panel 11 and the supporting layer 12 (metal sheet) is insufficient, and on the other hand, the metal sheet is bent to form a wavy shape, the material of the metal sheet needs a certain hardness, and the cover glass attached to the panel 11 has a relatively large hardness in order to satisfy the surface abrasion resistance. The whole hardness of the back panel attached with the cover plate glass is also higher, the back panel is curled after being attached with a metal sheet, the longitudinal and transverse pulling forces applied to the middle glue layer are both higher, and the glue is easy to peel off after being bent for many times.

Disclosure of Invention

The invention aims to provide a display device which can solve the problem that glue is peeled off in the bending test process of a bendable flexible panel.

In order to achieve the above object, the present invention provides a display device including: a support layer; the first adhesive layer is arranged on one side of the supporting layer; the display panel is arranged on one side, far away from the supporting layer, of the first adhesive layer; the supporting layer comprises at least two layers of metal sheets, a second adhesive layer is arranged between the two layers of metal sheets, each metal sheet is provided with a plurality of through holes, and the through holes correspond to the bending areas of the display device.

Furthermore, a third glue layer is arranged in the through hole.

Further, the cross-sectional shape of the through-hole includes a circle, a trapezoid, or a rectangle.

Furthermore, the through holes of the two layers of metal sheets are distributed in a staggered mode.

Further, the display panel includes an OLED display panel or an AMOLED display panel.

Further, the material of the metal sheet includes copper, molybdenum or silver.

Further, the display device further includes: the fourth adhesive layer is arranged on one side, far away from the first adhesive layer, of the display panel; and the cover plate glass is arranged on one side, far away from the display panel, of the fourth adhesive layer.

Further, the material of the first glue layer comprises a cured glue or a photoresist; the material of the second adhesive layer comprises a curing adhesive or a photoresist.

Further, the material of the third glue layer comprises a cured glue or a photoresist.

Further, the material of the fourth adhesive layer comprises a cured adhesive or a photoresist.

The invention has the beneficial effects that: the invention provides a display device, wherein a supporting layer is designed to be of a sandwich structure, the supporting layer comprises at least two layers of metal sheets and a second adhesive layer clamped between the two layers of metal sheets, and holes are dug in the two layers of metal sheets and filled with a third adhesive layer, so that the supporting layer has better curling performance and high bonding strength, and the adhesive layer is effectively prevented from falling off in the bending process. Meanwhile, the display panel has better supporting performance and integrates flexibility and rigidity.

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 structural diagram of a conventional display device.

Fig. 2 is a schematic structural diagram of a display device provided in the present invention.

FIG. 3 is a cross-sectional view of a kink zone via distribution provided by the present invention.

A display device 100;

a support layer 101; a first glue layer 105; a display panel 102;

a fourth glue layer 103; a cover glass 104;

metal pieces

1011a, 1011 b;

the second glue layer 1012; a third glue layer 1013; a through hole 106.

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. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should 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; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. 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 invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention 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, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

As shown in fig. 2, the present invention provides a display device 100, comprising: the display panel comprises a support layer 101, a first glue layer 105, a display panel 102, a fourth glue layer 103 and a cover glass 104.

The first glue layer 105 is disposed on one side of the support layer 101. In this embodiment, the material of the first adhesive layer 105 includes a cured adhesive or a photoresist.

The support layer 101 includes at least two

metal sheets

1011a and 1011b, a second adhesive layer 1012 is disposed between the two

metal sheets

1011a and 1011b, and in this embodiment, the material of the second adhesive layer 1012 includes a curable adhesive or a photoresist. The

metal sheets

1011a and 1011b are provided with a plurality of through holes 106, and the through holes 106 correspond to the bending regions 110 of the display device 100, that is, the support layer 101 of the present invention is configured as a metal sandwich structure.

The structure of the through holes 106 arranged at intervals can reduce stress during bending and avoid film peeling after bending.

The material of the

metal pieces

1011a, 1011b includes copper, molybdenum, or silver. The metal sheet has a high hardness because it functions as a support.

The through hole 106 is provided with a third glue layer 1013. The material of the third glue layer 1013 includes a curing glue or a photoresist. The third glue layer 1013 is connected to the second glue layer 1012 to increase the adhesion between the

metal sheets

1011a and 1011b of the support layer 101, and the third glue layer 1013 of the upper metal sheet 1011a is connected to the first glue layer 105 to increase the adhesion between the support layer 101 and the first glue layer 105.

The cross-sectional shape of the through hole 106 includes a trapezoidal hole or a rectangular hole, and the cross section of the trapezoidal hole is a right trapezoid. The shape of the through hole 106 on each of the

metal sheets

1011a, 1011b is not limited in the present invention, and different embodiments of the

metal sheets

1011a, 1011b may be matched with through holes 106 with different shapes.

As shown in fig. 3, in the bending region 110, the

metal sheet

1011a or 1011b may be further configured with through holes 106 having different apertures, which is not limited in the present invention.

Because the areas between the through holes 106 have larger stress if the through holes 106 of different metal layers are located correspondingly, the through holes 106 of the two

adjacent metal sheets

1011a, 1011b are designed to be distributed in a staggered manner, and the stress can be further dispersed.

Further, in the embodiment shown in fig. 2, two layers of

metal sheets

1011a and 1011b are provided, and the metal sheet 1011b disposed on the lower layer has a large stress, so that the number of through holes 106 disposed on the metal sheet 1011b on the lower layer is greater than the number of through holes 106 disposed on the metal sheet 1011a on the upper layer.

At least one through hole 106 is disposed at the junction of the bending region 110 and the display region 120, because the stress at the junction is relatively large and the routing at the junction is more and more important, it is necessary to dispose the through hole 106 to reduce the bending stress.

The display panel 102 is disposed on a side of the first adhesive layer 105 away from the support layer 101. The display panel 102 includes a back plate, and a driving layer and a display layer sequentially disposed on the back plate.

The display panel 102 includes an OLED display panel or an AMOLED display panel.

The fourth glue layer 103 is disposed on a side of the display panel 102 away from the first glue layer 105; the cover glass 104 is disposed on a side of the fourth glue layer 103 away from the display panel 102.

The material of the fourth glue layer 103 comprises a curing glue or a photoresist.

The invention provides a display device 100, wherein a supporting layer 101 is designed to be a sandwich structure, the supporting layer 101 comprises at least two layers of metal sheets 1011 and a second adhesive layer 1012 clamped between the two layers of metal sheets 1011, and the two layers of metal sheets 1011 are dug and filled with a third adhesive layer 1013, so that the supporting layer 101 has better curling performance and is additionally tightly connected with an adhesive, and the adhesive layer is effectively prevented from falling off in the bending process. Meanwhile, the display panel 102 has better supporting performance and integrates flexibility and rigidity.

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 above embodiments of the present invention are described in detail, and the principle and the implementation of the present invention are explained by applying specific embodiments, and the description of the above embodiments is only used to help understanding the technical scheme and the core idea 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. A display device, comprising:

a support layer;

the first adhesive layer is arranged on one side of the supporting layer;

the display panel is arranged on one side, far away from the supporting layer, of the first adhesive layer;

the supporting layer comprises at least two layers of metal sheets, a second adhesive layer is arranged between the two layers of metal sheets, each metal sheet is provided with a plurality of through holes, and the through holes correspond to the bending areas of the display device.

2. The display device of claim 1,

and a third adhesive layer is arranged in the through hole.

3. The display device of claim 1,

the cross-sectional shape of the through hole includes a circle, a trapezoid or a rectangle.

4. The display device of claim 1,

the through holes of the two layers of metal sheets are distributed in a staggered mode.

5. The display device of claim 1,

the display panel includes an OLED display panel or an AMOLED display panel.

6. The display device of claim 1,

the material of the metal sheet comprises copper, molybdenum or silver.

7. The display device of claim 1, further comprising:

the fourth adhesive layer is arranged on one side, far away from the first adhesive layer, of the display panel;

and the cover plate glass is arranged on one side, far away from the display panel, of the fourth adhesive layer.

8. The display device of claim 1,

the material of the first adhesive layer comprises curing adhesive or photoresist;

the material of the second adhesive layer comprises a curing adhesive or a photoresist.

9. The display device of claim 2,

the material of the third adhesive layer comprises a curing adhesive or a photoresist.

10. The display device of claim 7,

the material of the fourth adhesive layer comprises curing adhesive or photoresist.