CN212750245U

CN212750245U - Display device

Info

Publication number: CN212750245U
Application number: CN202022079048.XU
Authority: CN
Inventors: 张娜; 张斌; 王静
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-03-19
Anticipated expiration: 2030-09-21

Abstract

The present disclosure relates to a display device, which includes: a flexible display panel including a display side and a back side which are oppositely disposed in a thickness direction thereof; the supporting back film is positioned on the back side of the flexible display panel and comprises a bendable region and fixed regions positioned on two opposite sides of the bendable region in a first direction, and the first direction is vertical to the thickness direction; an adhesive part located between the fixing region of the support back film and the back side of the flexible display panel and adhered to the fixing region of the support back film and the back side of the flexible display panel; the flexible supporting part is positioned between the bendable region of the supporting back film and the back side of the flexible display panel and is in contact with the bendable region of the supporting back film and the back side of the flexible display panel; wherein the adhesiveness of the flexible support portion is less than that of the adhesive portion, or the flexible support portion is non-adhesive. According to the scheme, the bendable region of the foreign matter can be avoided, and therefore the risks of broken bright spots, black spots and the like of the flexible display panel in the repeated bending process can be improved.

Description

Display device

Technical Field

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

Background

Currently, LTPS (Low Temperature Poly-Silicon) based flexible display technology offers the possibility for foldable display products.

Wherein, foldable display product is including having flexible display panel and laminating at the dorsal support notacoria of flexible display panel usually, when adopting gluey material will support notacoria and flexible display panel laminating, can bring some foreign matters into between support notacoria and the flexible display panel inevitably, when the foreign matter exists in the region of can buckling, at the in-process of carrying out the folding repeatedly to the product, can make the foreign matter top injure flexible display panel because of the existence of mechanical stress, cause bad such as garrulous bright spot, black spot.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a display device, which can avoid the existence of a bendable region in a foreign object, and thus can improve the risks of broken bright spots, black spots, etc. occurring in a flexible display panel during a repeated bending process.

The present disclosure provides a display device, including:

a flexible display panel including a display side and a back side which are oppositely disposed in a thickness direction thereof;

the supporting back film is positioned on the back side of the flexible display panel and comprises a bendable region and fixed regions positioned on two opposite sides of the bendable region in a first direction, and the first direction is perpendicular to the thickness direction;

an adhesive portion located between the fixing region of the support backing film and the back side of the flexible display panel and adhered to the fixing region of the support backing film and the back side of the flexible display panel;

a flexible support part located between the bendable region of the support back film and the back side of the flexible display panel and contacting the bendable region of the support back film and the back side of the flexible display panel;

wherein the adhesiveness of the flexible support portion is smaller than that of the adhesive portion, or the flexible support portion is free of adhesiveness.

In an exemplary embodiment of the present disclosure, the flexible supporting portion has no adhesion, wherein there is no adhesion between the flexible supporting portion and the back side of the flexible display panel, and the flexible supporting portion is adhered to the bendable region of the supporting back film by an adhesive material.

In an exemplary embodiment of the present disclosure, the material of the bonding portion is optical glue; the material of flexible supporting part is silica gel.

In an exemplary embodiment of the present disclosure, the bendable region of the support backing film is provided with a plurality of hollowed-out holes.

In an exemplary embodiment of the present disclosure, a portion of the flexible support is embedded in the hollow hole.

In an exemplary embodiment of the disclosure, the plurality of hollow holes are divided into a plurality of hollow groups, each hollow group includes a plurality of hollow holes arranged at intervals in a second direction, and the second direction is perpendicular to the first direction and the thickness direction.

In an exemplary embodiment of the present disclosure, the hollow holes of the adjacent hollow groups are arranged in a staggered manner.

In an exemplary embodiment of the present disclosure, the hollow hole is an oblong hole, and a length direction of the oblong hole is the second direction.

In an exemplary embodiment of the present disclosure, the rigidity of the fixed region in the support backing film is greater than the rigidity of the bendable region in the support backing film.

In an exemplary embodiment of the present disclosure, further comprising: the flexible display panel comprises a polaroid and a cover plate, wherein the polaroid is positioned on the display side of the flexible display panel, and the cover plate is positioned on one side, far away from the flexible display panel, of the polaroid.

The technical scheme provided by the disclosure can achieve the following beneficial effects:

according to the display device provided by the disclosure, the bonding part is arranged to be bonded with the fixed area of the supporting back film and the back side of the flexible display panel, so that the supporting back film can be bonded with the flexible display panel; then, set up the flexible supporting part that the adhesion is less than adhesion portion or no adhesion nature between regional and the dorsal part of flexible display panel of buckling through supporting the notacoria, design convenience carries out high-efficient cleanness to flexible supporting part like this, thereby can improve the flexible supporting part and glue the condition that has the foreign matter towards flexible display panel, in order to alleviate or avoid the foreign matter to be brought into between regional and the flexible display panel of buckling that supports the notacoria, can improve the flexible display panel risk such as garrulous bright spot, black spot of buckling the in-process again and again, and the product quality is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;

fig. 2 is a schematic top view illustrating an assembled supporting back film and a flexible supporting portion in a display device according to an embodiment of the disclosure;

FIG. 3 shows a schematic cross-sectional view of the structure shown in FIG. 2 along line A-A;

FIG. 4 shows a schematic structural view of the support backing film shown in FIG. 2;

fig. 5 is a schematic structural diagram of a display device according to another embodiment of the present disclosure.

Reference numerals:

1. a display device; 10. a flexible display panel; 11. a support backing film; 110. a bendable region; 110a, hollow holes; 111. a fixed area; 12. an adhesive portion; 13. a flexible support portion; 14. a polarizer; 15. and (7) a cover plate.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments may be implemented in a plurality of different forms. Those skilled in the art can readily appreciate the fact that the forms and details may be varied into a variety of forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the contents described in the following embodiments. The embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.

In the drawings, the size of each component, the thickness of layers, or regions may be exaggerated for clarity. Therefore, one aspect of the present disclosure is not necessarily limited to the dimensions, and the shapes and sizes of the respective components in the drawings do not reflect a true scale. Further, the drawings schematically show ideal examples, and one embodiment of the present disclosure is not limited to the shapes, numerical values, and the like shown in the drawings.

It is noted that the phrase "on … …" as used herein can mean that one layer is formed or disposed directly on another layer, or that one layer is formed or disposed indirectly on another layer, i.e., that another layer is present between the two layers.

The terms "a", "an", "the" are used to indicate the presence of one or more elements/components/etc.; the term "comprising" is used in an open-ended inclusive sense and means that there may be additional elements/components/etc. other than the listed elements/components/etc.

The ordinal numbers such as "first" and "second" in the present specification are provided to avoid confusion of the constituent elements, and are not limited in terms of number.

In this specification, the term "connected" is to be understood in a broad sense unless otherwise explicitly stated or limited. For example, it may be a fixed connection, or a removable connection, or an integral connection; can be a mechanical connection, or an electrical connection; either directly or indirectly through intervening components, or both may be interconnected. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

As shown in fig. 1, the present disclosure provides a display device 1, where the display device 1 may include a flexible display panel 10, a supporting back film 11, an adhesive portion 12, and a flexible supporting portion 13.

In an embodiment of the present disclosure, the flexible display panel 10 may include a display side and a back side that are oppositely disposed in a thickness direction Z thereof. In the embodiment of the present disclosure, the flexible display panel 10 may be bent, folded, or the like. For example, the flexible display panel 10 may be an OELD (organic light-Emitting Diode) display, but is not limited thereto.

The supporting back film 11 may be located on the back side of the flexible display panel 10 to provide a certain support for the flexible display panel 10, so as to improve the flatness of the flexible display panel 10 and enhance the impact resistance and bending resistance of the flexible display panel 10, that is: the reliability and the stability of the product are improved. For example, in order to satisfy the supporting performance of the supporting back membrane 11, the supporting back membrane 11 may be made of a material having a certain thickness and rigidity, for example, a metal material such as SUS (stainless steel), but is not limited thereto, and may be other materials.

Specifically, as shown in fig. 1, the supporting back film 11 may include a bendable region 110 and fixing regions 111 located at two opposite sides of the bendable region 110 in a first direction X, where the first direction X is perpendicular to a thickness direction Z of the flexible display panel 10; it should be understood that the bendable region 110 of the supporting back film 11 is opposite to the bendable region 110 of the flexible display panel 10, and when the bendable region 110 of the flexible display panel 10 is bent, the bendable region 110 of the supporting back film 11 is also bent along with the bendable region 110 of the flexible display panel 10; the fixing region 111 of the supporting back film 11 is required to be opposite to the fixing region 111 of the flexible display panel 10, and in the process of bending the flexible display panel 10 mounted with the supporting back film 11, the fixing region 111 (including the fixing region 111 of the flexible display panel 10 and the fixing region 111 of the supporting back film 11) is required to be clamped, and then the bendable region 110 is required to be bent.

In one implementation, in order to improve the bending performance of the bendable region 110 in the supporting back membrane 11 to facilitate matching the requirement of a smaller bending radius, the rigidity of the bendable region 110 needs to be designed to be smaller, and the rigidity refers to the capability of resisting deformation; meanwhile, in order to ensure the supporting stability of the supporting back membrane 11, the structural stability of the supporting back membrane 11 as a whole, and reduce the processing deformation, the rigidity of the fixing region 111 needs to be designed to be larger, that is, the rigidity of the fixing region 111 in the supporting back membrane 11 of the embodiment of the present disclosure needs to be larger than the rigidity of the bendable region 110.

It should be noted that, since the supporting back membrane 11 is generally made of the same metal material, that is, the materials of the fixed region 111 and the bendable region 110 in the supporting back membrane 11 can be the same, in order to make the rigidity of the fixed region 111 different from that of the bendable region 110, different patterning processes can be performed on the fixed region 111 and the bendable region 110 to achieve the purpose of different rigidities; it should be understood that the bendable region 110 and the fixed region 111 of the support backing film 11 of the disclosed embodiment can also be made of different rigid materials.

Wherein, in order to make the bendable region 110 less rigid, the bending performance is improved; the entire bendable region 110 may be subjected to an open-hole patterning process, i.e.: as shown in fig. 4, the bendable region 110 of the support backing film 11 may be provided with a plurality of hollow holes 110 a.

Optionally, as shown in fig. 4, the plurality of hollow holes 110a may be divided into a plurality of hollow groups, each hollow group may include a plurality of hollow holes 110a arranged at intervals in a second direction Y, and the second direction Y is perpendicular to the first direction X and the thickness direction Z of the flexible display panel 10; it should be understood that the bending axis of the bendable region 110 of the embodiment of the disclosure may be the second direction Y, and therefore, by disposing a plurality of the hollow holes 110a at intervals in the second direction Y, the bending performance of the bendable region 110 may be further improved.

Further, as shown in fig. 4, the hollow holes 110a of adjacent hollow groups may be arranged in a staggered manner, so as to balance the stress applied to each position of the bendable region 110, thereby avoiding the situation that the supporting back film 11 is damaged due to stress concentration.

For example, the hollow hole 110a of the embodiment of the disclosure may be an oblong hole, and specifically, as shown in fig. 4, the length direction of the hollow hole 110a may be the aforementioned second direction Y, and two opposite sides of the hollow hole 110a in the length direction are semicircular, and two sides of the hollow hole 110a in the first direction X are linear; by designing the hollow holes 110a as the long round holes, the bending performance of the bendable region 110 is improved, and meanwhile, the problem of stress concentration on two opposite sides of the hollow holes 110a in the length direction can be avoided, so that the structural stability of the support back film 11 is improved; but not limited thereto, the hollow hole 110a may also be in other shapes, such as: circular, oval, "I" shaped, and the like.

Note that, in order to ensure that the rigidity of the fixed region 111 in the supporting back film 11 is greater than that of the bendable region 110, the fixed region 111 may not be subjected to the open-cell patterning process; but not limited thereto, the fixed region 111 may be subjected to open-cell patterning, as long as the opening density and the opening size are smaller than those of the bendable region 110, so that the damage of the joint between the bendable region 110 and the fixed region 111 due to excessive stress jump can be alleviated while the overall supporting performance of the supporting back film 11 is ensured.

As shown in fig. 1, the adhesive part 12 may be located between the fixing region 111 of the support back film 11 and the back side of the flexible display panel 10, and be adhered to the fixing region 111 of the support back film 11 and the back side of the flexible display panel 10 to achieve adhesion of the support back film 11 and the flexible display panel 10. For example, the bonding portion 12 may be an optical adhesive (OCA) to improve the bonding stability between the supporting film 11 and the flexible display panel 10; but not limited thereto, other adhesive materials may be used as long as the supporting back film 11 and the flexible display panel 10 can be stably bonded together.

As shown in fig. 1, the flexible supporting portion 13 may be located between the bendable region 110 of the supporting back film 11 and the back side of the flexible display panel 10, and is in contact with the bendable region 110 of the supporting back film 11 and the back side of the flexible display panel 10, and this flexible supporting portion 13 may function to support the flexible display panel 10 and the supporting back film 11, so that the folded product can be restored to the original state when unfolded; wherein, the adhesion of flexible supporting part 13 is less than the adhesion of bonding portion, or flexible supporting part 13 does not have the adhesion, design convenience carries out high-efficient cleanness to flexible supporting part 13 like this, in order to alleviate or avoid flexible supporting part 13 to be stained with the condition of foreign matter towards flexible display panel 10, thereby can alleviate or avoid the foreign matter to be brought into between the regional 110 of can buckling and the flexible display panel 10 that supports notacoria 11, then can alleviate or avoid in the repeated process of buckling because of the foreign matter topwound flexible display panel 10 and cause garrulous bright spot, risks such as black spot, product quality has been improved.

In an embodiment, the flexible support 13 may have no adhesion as a whole, and specifically, the flexible support 13 may be in direct contact with the back side of the flexible display panel 10, that is, there is no adhesion between the flexible support 13 and the flexible display panel 10; since there is no adhesion between the flexible supporting portion 13 and the back side of the flexible display panel 10, in order to avoid the flexible supporting portion 13 from being dislocated after being repeatedly bent, a glue material may be disposed on the side of the flexible supporting portion 13 contacting the bendable region 110 of the supporting back film 11, that is, the flexible supporting portion 13 may be adhered to the bendable region 110 of the supporting back film 11 through the glue material, which may be an optical glue, but is not limited thereto, and may be another glue material as long as the stable connection between the flexible supporting portion 13 and the supporting back film 11 can be ensured.

For example, in the embodiment of the present disclosure, the flexible supporting portion 13 may be made of silicone rubber, so as to ensure good bending performance and good supporting performance, so as to facilitate the folded product to be able to recover to the initial state when being unfolded; but not limited thereto, the material of the flexible supporting portion 13 may be foam, rubber, etc., as the case may be.

When the aforementioned hollow hole 110a is formed in the bendable region 110 of the support back film 11, as shown in fig. 2 and 3, a portion of the flexible support portion 13 may be embedded in the hollow hole 110a, so as to increase a contact area between the flexible support portion 13 and the support back film 11, thereby increasing a friction force between the flexible support portion 13 and the support back film 11, further avoiding a situation that the flexible support portion 13 is dislocated after being repeatedly bent, and ensuring connection stability between the flexible support portion 13 and the support back film 11. In the embodiment of the present disclosure, in the process of attaching the supporting back film 11 to the flexible supporting portion 13, the method specifically includes: firstly, the flexible supporting part 13 is bonded with the bendable region 110 of the supporting back film 11; thereafter, the adhesive portion 12 may be formed at the fixing region 111 of the support back film 11; then, the adhesive part 12 is adhered to the back side of the flexible display panel 10, so that the whole supporting back film 11 is attached to the back side of the flexible supporting part 13; the adhesive portion 12 is bonded to the back side of the flexible display panel 10, and the flexible support portion 13 is in contact with the back side of the flexible support portion 13.

It should be noted that after the flexible supporting portion 13 is bonded to the bendable region 110 of the supporting back film 11 and before the bonding portion 12 is bonded to the back side of the flexible display panel 10, the flexible supporting portion 13 may be cleaned to prevent foreign matters from being brought between the bendable region 110 of the supporting back film 11 and the flexible display panel 10, so as to alleviate or avoid the risk of broken bright spots, black spots and the like caused by the foreign matters damaging the flexible display panel 10 during repeated bending, and improve the product quality.

In some embodiments, as shown in fig. 5, the display device 1 may further include a polarizer 14 and a cover plate 15, where the polarizer 14 is located on the display side of the flexible display panel 10, and the cover plate 15 may be located on the side of the polarizer 14 away from the flexible display panel 10.

For example, when the flexible display panel 10 mentioned in the embodiment of the present disclosure is an OLED display, the polarizer 14 may be a circular polarizer 14, which has a higher reflectivity to the external ambient light, so as to reduce the overall reflectivity of the display device 1 and improve the display effect.

And the cover 15 may be a flexible cover 15, for example: the cover plate 15 can be made of materials such as PI (polyimide) and the like, so that the cover plate has certain bending and folding performances and can be bent together with the flexible display panel 10 and the supporting back film 11; but not limited thereto, the cover plate 15 may be a glass cover plate 15.

The outer contour of the cover plate 15 may exceed the outer contours of the polarizer 14, the flexible display panel 10, and the supporting back film 11, so that the cover plate 15 may be mounted on the middle frame, but is not limited thereto, and the outer contour of the cover plate 15 may also coincide with the outer contours of the polarizer 14, the flexible display panel 10, and the supporting back film 11, as the case may be.

It should be noted that, the display device 1 according to the embodiment of the present disclosure may be a foldable display product, which can be folded inward or outward, where the folded inward indicates that the display side is located at the inner side after being folded, and the folded outward indicates that the display side is located at the outer side after being folded.

In the embodiment of the present disclosure, the specific type of the display device 1 is not particularly limited, and any type of the display device 1 commonly used in the art may be used, specifically, for example, a television, a mobile phone, a computer, a watch, a vehicle-mounted device, a medical device, and the like, and a person skilled in the art may select the type of the display device 1 according to the specific use of the display device 1, and details thereof are not repeated herein.

It should be noted that, besides the aforementioned structure, the display device 1 further includes other necessary components and compositions, such as a housing, a circuit board, a power line, etc., taking a television as an example, which can be supplemented correspondingly according to the specific requirements of the display device 1, and will not be described herein again.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A display device, comprising:

2. The display device according to claim 1, wherein the flexible support portion is free of adhesion to a back side of the flexible display panel, and wherein the flexible support portion is adhered to the bendable region of the support back film by an adhesive material.

3. The display device according to claim 2, wherein the material of the bonding portion is an optical adhesive; the material of flexible supporting part is silica gel.

4. The display device according to claim 1, wherein the bendable region of the support back film is provided with a plurality of hollowed-out holes.

5. The display device according to claim 4, wherein a portion of the flexible support is embedded in the hollowed-out hole.

6. The display device according to claim 4, wherein the plurality of holes are divided into a plurality of groups, each group of the plurality of groups comprises a plurality of holes spaced in a second direction, and the second direction is perpendicular to the first direction and the thickness direction.

7. The display device according to claim 6, wherein the hollow holes of adjacent hollow groups are arranged in a staggered manner.

8. The display device according to claim 6, wherein the hollow hole is an oblong hole, and a length direction of the oblong hole is the second direction.

9. The display device according to claim 1, wherein the rigidity of the fixed region in the support back film is greater than the rigidity of the bendable region in the support back film.

10. The display device according to any one of claims 1 to 9, further comprising: the flexible display panel comprises a polaroid and a cover plate, wherein the polaroid is positioned on the display side of the flexible display panel, and the cover plate is positioned on one side, far away from the flexible display panel, of the polaroid.