CN112489565B

CN112489565B - Display panel and display device

Info

Publication number: CN112489565B
Application number: CN202011533422.7A
Authority: CN
Inventors: 何春梅
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2022-11-01
Anticipated expiration: 2040-12-22
Also published as: CN112489565A

Abstract

The invention provides a display panel and a display device, wherein the display panel comprises: the display comprises a display, a first adhesive layer, a first protective layer, a second protective layer, a third protective layer, an adhesion layer and a polaroid. At least two deformation blocks are arranged in the first protection layer of the bending area. When the display panel is bent, the deformation block of the bending area is stretched, which can effectively relieve the stress generated during bending. After buckling repeatedly, can also resume flat state after buckling in order to guarantee the deformation of first protective layer, need increase a second protective layer, the second protective layer can help the recovery of the deformation piece of first protective layer flat in-process.

Description

Display panel and display device

Technical Field

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

Background

With the development of display technology, various display panels with different characteristics are produced to meet different use requirements. The development trend of intellectualization, portability and flexibility is one of the main development directions of the current electronic equipment. Compared with the traditional flat panel display, the flexible display has the most outstanding advantages that the original inherent concept of two-dimensional display is broken through, and the application field of the display is expanded to more portable devices. The flexible display device is a novel display product with flexibility, and when the flexible display device is used, a user can fold or curl the flexible display device as required to reduce the size of the display device and improve the portability of the display device. Alternatively, the foldable display device may be unfolded to obtain a large display screen.

The folding product forms of the flexible display panel are diversified, the final bending forms are different according to different panel designs, the stress in the bending process of different bending forms is different, and at present, three bending forms are available on the market, namely a water drop shape, a wedge shape or an inverted U shape. Each shape has advantages, wherein the wedge-shaped products can not be completely combined in an inward folding state, the appearance is not beautiful, the thickness of the whole machine is thick, foreign matters can enter the gap to cause screen damage and the like. And the irregular shape of the water drops can realize that the products are completely combined in an inward folded state, and the attractive appearance can be realized. However, such irregular shapes have relatively large stress during the bending process, so that "creases", "white lines", etc. occur in the bending region, resulting in failure of the flexible display.

Disclosure of Invention

The present invention is directed to a display panel, which can reduce the stress applied to a bending region when the display panel is bent.

In order to achieve the above object, the present invention provides a display panel, including a display region and a bending region, the display panel including: a display; the first protective layer is arranged below the display; wherein the first protective layer comprises: and the at least two deformation blocks are uniformly arranged in the first protective layer, and when the display panel is bent, the deformation blocks in the bent area are stretched.

Further, the first protective layer is made of an organic material; the organic material includes polyimide.

Further, the display panel further includes: the second protective layer is arranged on one side, far away from the display, of the first protective layer.

Further, the material of the second protective layer is an organic material; the organic material includes polyimide.

Further, a first glue layer is arranged between the first protection layer and the display.

Further, the lower surface of the deformation block is flush with the lower surface of the first protection layer; the upper surface of the deformation block is flush with the upper surface of the first protection layer.

Further, a stretching layer is filled between the adjacent deformation blocks.

Further, the material of the stretching layer comprises a polyurethane material or a silica gel.

Further, the display panel further includes: the polaroid is arranged on the display; the adhesion layer is arranged on the polarizer; and the third protective layer is arranged on the adhesion layer.

The present invention also provides a display device including: the display panel described above; and the supporting layer is arranged below the display panel and corresponds to the display area, and when the bending area is folded, the bending area is in a water drop shape.

The beneficial effects of the invention are: the invention provides a display panel, which is characterized in that at least two deformation blocks are arranged in a first protective layer of a bending area. When the display panel is bent, the deformation block of the bending area is stretched, which can effectively relieve the stress generated during bending. After buckling repeatedly, can also resume flat state after buckling in order to guarantee the deformation of first protective layer, need increase a second protective layer, the second protective layer can help the recovery of the deformation piece of first protective layer flat in-process.

Drawings

The technical scheme and other beneficial effects of the invention are obvious from the detailed description of the specific embodiments of the invention in combination with the attached drawings.

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the invention.

Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a display panel according to another embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a portion of a display device according to an embodiment of the invention after bending.

Reference numerals of the invention.

A display panel 100; a display device 200;

a display area 110; a bending region 120; a display 104;

a first glue layer 103; a first protective layer 102; a second protective layer 101;

a third protective layer 108; an adhesive layer 107; a polarizer 106;

a deformation block 1021.

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 should be apparent that the described embodiments are only some embodiments of the present invention, 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 invention.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, specific example components and arrangements 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. 1, an embodiment of the invention provides a display panel 100, which includes a display area 110 and a bending area 120, wherein the display area 110 is disposed on two sides of the bending area 120.

As shown in fig. 2, the display panel 100 includes: a display 104, a first adhesive layer 103, a first protective layer 102, a second protective layer 101, a third protective layer 108, an adhesive layer 107, and a polarizer 106.

The display 104 is a flexible display panel 100.

The first glue layer 103 is disposed between the first protection layer 102 and the display 104. The first adhesive layer 103 is used to increase the adhesion between the protection layer of the bending region 120 and the display 104.

The first protective layer 102 is disposed below the first adhesive layer 103. The first protective layer 102 is made of an organic material; the organic material includes polyimide.

The first protective layer 102 includes: at least two deformation blocks 1021.

The deformation blocks 1021 are uniformly arranged in the first protection layer 102, and when the display panel 100 is bent, the deformation blocks 1021 of the bending area 120 are stretched, which can effectively relieve the stress generated during bending.

The lower surface of the deformation block 1021 is flush with the lower surface of the first protection layer 102; the upper surface of the deformation block 1021 is flush with the upper surface of the first protective layer 102.

The deformation block 1021 has the characteristics of expansion and contraction. The material of the deformation block 1021 comprises rubber.

The second protective layer 101 is disposed on a side of the first protective layer 102 away from the display 104.

The material of the second protective layer 101 is an organic material; the organic material includes polyimide.

After repeated bending, in order to ensure that the first protection layer 102 can be restored to the flat state after being deformed and bent, a second protection layer 101 needs to be added, and the second protection layer 101 can help the deformation block 1021 to be restored during the process of flattening the first protection layer 102.

The polarizer 106 is disposed on the display 104; the adhesion layer 107 is arranged on the polarizer 106; the third passivation layer 108 is disposed on the adhesive layer 107.

In other embodiments, in order to increase the adhesion between the protection layers, an adhesive layer may be disposed on the surface of the deformation block 1021, so as to increase the adhesion between the upper layer and the lower layer, thereby improving the reliability of the panel when bending.

An embodiment of the invention provides a display panel 100, in which at least two deformation blocks 1021 are disposed in a first protection layer 102 of a bending region 120. When the display panel 100 is bent, the deformation block 1021 of the bending region 120 is stretched, which can effectively relieve the stress generated during bending. After repeated bending, in order to ensure that the first protection layer 102 can be restored to the flat state after being deformed and bent, a second protection layer 101 needs to be added, and the second protection layer 101 can help the deformation block 1021 to be restored during the process of flattening the first protection layer 102.

As shown in fig. 3, another embodiment of the present invention provides a display panel 100a, which is different from the above embodiments in that a tensile layer 1022a is filled between adjacent deformation blocks 1021 a.

The tensile layer 1022a has elastic characteristics. Specifically, the stretch layer 1022a has stretch and extensibility properties.

The material of the stretching layer 1022a includes a polyurethane material or a silicone rubber.

In order to ensure the flatness and the easy assembly of the display panel 100a, the thickness of the first protection layer 102a needs to be increased, but the increased thickness makes the display panel unable to be bent, and in order to achieve the reduced thickness of the bending region 120a, the bending region 120a needs to be filled with a stretchable material, which increases the supporting characteristics of the first protection layer 102 a.

As shown in fig. 4, the present invention provides a display device 200, which includes the display panel 100 and the support layer 201.

The support layer 201 is disposed below the display panel 100 and corresponds to the display area 110, and when the bending area 120 is folded, the bending area 120 is in a water-drop shape (as shown in fig. 5).

According to the invention, the segmented support layer 201 is attached to the display panel 100, and the hard support layer 201 is attached to the display panel 100 in the display area 110, so that the display device 200 has toughness during pressing and good flatness in a spread and flat state.

Similarly, a flexible supporting layer 201 that is resistant to bending can be used in the bending region 120 to adhere to the bending region 120 of the display panel 100, so that the stress from the bending region 120 can be reduced, the deformation of the adhesive layer can be reduced, the flexible supporting layer is resistant to bending, and the display device 200 can be kept in a water drop shape or a U shape after being folded.

The principle and the implementation of the present invention are explained by applying specific examples, and the above description of the embodiments is only used to help understanding the technical solution 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 panel is divided into a display area and a bending area, and is characterized by comprising:

a display;

the first protective layer is arranged below the display; the first protective layer is made of an organic material, and the organic material comprises polyimide;

the first adhesive layer is arranged between the first protective layer and the display;

the at least two deformation blocks are uniformly arranged in the bending area of the first protection layer; the lower surface of the deformation block is flush with the lower surface of the first protection layer, and the upper surface of the deformation block is flush with the upper surface of the first protection layer; when the bending area of the display panel is bent into a water drop shape, the deformation block of the bending area is stretched to relieve the stress generated when the bending area is bent; the material of the deformation block comprises rubber;

the stretching layer is filled between the adjacent deformation blocks in the first protection layer, and the upper surface of the stretching layer is lower than that of the deformation blocks; the material of the stretching layer comprises a polyurethane material or silica gel; and

the second protective layer is arranged on one side, far away from the display, of the first protective layer; the second protective layer is made of an organic material, and the organic material comprises polyimide.

2. The display panel of claim 1, further comprising:

the polaroid is arranged on the display;

the adhesion layer is arranged on the polarizer; and

and the third protective layer is arranged on the adhesion layer.

3. A display device, comprising:

the display panel of claim 1 or 2, the display panel being divided into a display area and a bending area; and

the supporting layer is arranged below the display panel and comprises a hard supporting layer and a bending-resistant soft supporting layer, the hard supporting layer is attached to the display area, and the soft supporting layer is attached to the bending area;

when the bending area is folded, the bending area is in a water drop shape.