CN112863358B

CN112863358B - Display device

Info

Publication number: CN112863358B
Application number: CN202110101568.2A
Authority: CN
Inventors: 王鹏
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2022-07-12
Anticipated expiration: 2041-01-26
Also published as: CN112863358A

Abstract

The application discloses display device, display device includes: the display module is arranged on one side of the cover plate; the anti-impact layer is arranged on one side of the display module, which is far away from the cover plate; at least one side edge of the impact-resistant layer is expanded outwards to form an expanded area compared with the corresponding edge of the display module, so that the protection effect on the edge is increased. In addition, the non-outward-expansion area is arranged on the anti-impact layer of the bending area of the display device, so that the bending characteristic of the bending area is not affected.

Description

Display device

Technical Field

The application relates to the technical field of display, in particular to a display device capable of resisting impact and protecting product edges.

Background

The edge laminate design of the current foldable products is usually flush or retracted. Referring to fig. 1, a schematic structural diagram of a conventional display device 9 is shown, in which an edge structure of the conventional display device adopts a flush design, and the edge structure of the conventional display device includes a cover plate 91, an optical adhesive layer 92, a polarizing layer 93, a display panel 94 and a back plate layer 95, which are stacked. A light shielding layer 96 is further disposed on one side of the cover plate 91 close to the optical adhesive layer 92 to prevent light leakage at the edge.

However, the above design is not sufficient for protection of the edge portions of the folded product. Especially, the novel folding screen mobile phone may adopt an extremely thin glass panel (UTG), and the UTG panel has better transparency and hardness than a plastic transparent PI film. However, UTG panels have the greatest problems of impact resistance, edge brittleness, and the like. Therefore, the edge of the material with fragile edge needs to be specially designed.

In view of the above problems, the present invention provides a new display device.

Disclosure of Invention

This application aim at provides a display device sets up the impact resistance layer through the one side that deviates from the apron at display module assembly, at least one side edge of impact resistance layer outwards expands and stretches the formation and expand the region outward to can improve display device and resist the ability of external force when receiving the edge impact, increase the protection to the edge.

The present application provides a display device, the display device includes: a cover plate; the display module is arranged on one side of the cover plate; the shock resistance layer is arranged on one side of the display module group, which is far away from the cover plate; at least one side edge of the impact-resistant layer extends outwards to form an outwards-expanded area.

In some embodiments, the display module has a bending region, and a first non-bending region and a second non-bending region located at two opposite sides of the bending region.

In some embodiments, the flared regions of the impact resistant layer correspond to the first and second non-buckled regions.

In some embodiments, the impact resistant layer has a non-flared region corresponding to the bending region.

In some embodiments, the non-flared region has a width greater than a width of the inflection region.

In some embodiments, the display device further comprises: the glass layer is arranged between the cover plate and the display module; at least one side edge of the glass layer retracts relative to the display module to form a retraction area, and a buffer layer is arranged in the retraction area.

In some embodiments, the material of the glass layer is strengthened ultra-thin glass; the buffer layer comprises a high polymer rubber material; the material of the impact resistant layer is a metal material.

In some embodiments, the display module includes a function control layer and a display film layer, which are stacked, the function control layer is disposed on a side of the glass layer away from the cover plate, and the display film layer is disposed on a side of the function control layer away from the glass layer.

In some embodiments, the display film layer is a flexible OLED display panel; the functional control layer is at least one of a touch layer or a polarizer.

In some embodiments, the display device further comprises: the back plate layer is positioned on one side, far away from the cover plate, of the display module; wherein the anti-impact layer is arranged on one side of the back plate layer far away from the display module.

Compare in prior art, the display device that this application provided sets up the shock resistance layer through the one side that deviates from the apron at display module assembly (especially at the backplate layer), at least one side edge of shock resistance layer outwards expands and extends and form the region that expands outward to the increase is to the guard action at edge. In addition, the application also aims at the problem that a part of products have outward expansion space limitation, for example, because a display module of the display device is provided with a bending area, a first non-bending area and a second non-bending area which are positioned at two opposite sides of the bending area, the outward expansion area is arranged on an impact-resistant layer corresponding to the first non-bending area and the second non-bending area; a non-outward expansion area is arranged on the anti-impact layer corresponding to the bending area; the width of the non-outward-expanding area is larger than that of the bending area, so that the edge is protected, and meanwhile, the bending characteristic of the bending area is not affected. It is thus clear that when this application display device is receiving external shock, utilize external shock to touch earlier the shock-resistant layer expand the region outward, can not directly make to the impact at display module assembly edge, thereby can improve display device's edge resists the ability of external force when receiving external shock.

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 schematic structural view of a conventional display device, which mainly shows a stacked structure of the display device in one side edge region thereof.

Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present application, which mainly shows a stacked structure of the display device in a side edge region thereof.

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

The main structural or element symbols are as follows:

1, 1a, a display device; 2. A binding region;

3. a chip on film; 31. A driving chip;

100. a cover plate; 101, 101a, a main display area;

102. an edge region; 200. A glass layer;

201. a retraction area; 202. A first adhesive layer;

203. a second adhesive layer; 204. A buffer layer;

300. a display module; 301. A function control layer;

302. displaying the film layer; 400. A backsheet layer;

500, 500a, an impact resistant layer; 501, 501a, an external expansion area;

502a, a non-flaring region; 1011a, a bending region;

1012a, a first non-bending area; 1013a, a second non-bending area;

11a, a bending shaft.

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.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. In the present embodiment, the display device 1 has a foldable, rollable, or the like characteristic. As shown in fig. 2, the display device 1 has a cover plate 100, a display module 300 and an impact resistant layer 500, wherein the display module 300 is disposed on one side of the cover plate 100; the anti-impact layer 500 is disposed on a side of the display module 300 away from the cover plate 100. At least one side edge of the impact resistant layer 500 is flared outward to form a flared region 501.

As shown in fig. 2, in one embodiment of the present application, it is preferable that the impact resistant layer 500 is made of a metal material, such as: stainless Steel (Stainless Steel). The flared region 501 of the impact resistant layer 500 is used to block damage to the edge of the display device 1 caused by external force, and provide an edge protection function.

Specifically, at least one side edge of the impact resistant layer 500 extends outwardly by a distance of 0.15mm or more than a corresponding edge of the display module 300.

Preferably, the peripheral edges of the impact resistant layer 500 are extended outwards relative to the edges of the display module 300 to form the extended regions 501, and the entire display device 1 is protected by the impact resistant layer 500. More specifically, since fig. 2 is a cross-sectional view at only one edge thereof, it shows that the impact resistance layer 500 is formed only at the right side edge (or left side edge) of the impact resistance layer 500. In other embodiments, the flaring regions 501 may be disposed on two opposite side edges (right side edge and left side edge) of the impact resistant layer 500, or the flaring regions 501 may be preferably formed around the impact resistant layer 500 as in this embodiment. It can be seen that, the present application does not limit the specific position, number, extending distance, or extending area of the extended region 501, and these parameters may vary according to the model structure of the actual display device, and the main purpose is to protect the edge of the display device.

Referring to fig. 2, the display device further includes a glass layer 200 disposed between the cover plate 100 and the display module 300; at least one side edge of the glass layer 200 is retracted relative to the display module 300 to form a retracted area 201.

In this embodiment, preferably, the peripheral edges of the glass layer 200 are all recessed relative to the edges of the cover plate 100 by a distance greater than or equal to 0.25 mm.

Preferably, the Glass layer 200 is strengthened Ultra-Thin Glass (UTG). The strengthened ultrathin glass is foldable, good in flexibility, smooth in hand feeling, good in uniformity, high in strength, high in hardness, and capable of keeping better optical performance of the glass, and the display device 1 applying the strengthened ultrathin glass is high in impact resistance, prevents fragments of the glass layer 200 from flying when the glass layer is collided and broken, and is safe and reliable. The strengthened ultrathin glass is suitable for folding screen equipment, and can also be suitable for foldable mobile phones, tablet computers, electronic readers, electronic photo albums, exhibition windows and the like. Moreover, in the preparation process of the strengthened ultrathin glass, common glass is generally required to be thinned, subjected to CNC (computer numerical control) edging or formed by subsequent grinding, polishing and other processes, the surface of the ultrathin glass can be chemically strengthened by performing ion exchange on the ultrathin glass, and the strengthened ultrathin glass (UTG) is obtained by performing laser treatment on the ultrathin glass, so that the strengthened ultrathin glass is strengthened in strength.

It should be noted that, compared to the edge of the folding product of the current display device that is usually designed to be flush or retracted, because the edge of the folding product is not sufficiently protected by the flush design or retracted design, especially after the strengthened ultra-thin glass is added inside the folding product, the edge of the display device needs to be specially designed because the strengthened ultra-thin glass is a fragile material at the edge, that is, at least one side edge of the impact-resistant layer 500 is extended outward to form the extended region 501 compared with the corresponding edge of the display module 300, and the impact-resistant layer 500 utilizes the extended region 501 to protect the edge of the display device 1.

Continuing to fig. 2, the display device further includes: a first adhesive layer 202 and a second adhesive layer 203, the first adhesive layer 202 being used to fix the glass layer 200 to the cover plate 100, the second adhesive layer 203 being used to fix the glass layer 200 to the display module 300.

In the embodiment of the present application, the material of the first Adhesive layer 202 and the second Adhesive layer 203 is preferably transparent optical Adhesive (OCA). In other embodiments, the material of the first adhesive layer 202 may be one of transparent optical tape, liquid transparent optical adhesive (LOCA), Optically Clear Resin (OCR), polyvinyl butyral, or ethylene-vinyl acetate copolymer; the material of the second adhesive layer 203 is one of a transparent optical tape, a liquid transparent optical adhesive, an optically transparent resin, polyvinyl butyral or an ethylene-vinyl acetate copolymer. In some embodiments, the first adhesive layer 202 and the second adhesive layer 203 are both double-sided tape. The first adhesive layer 202 and the second adhesive layer 203 are respectively used for bonding the cover plate 100, the display module 300 and the glass layer 200 and realizing double-sided support, which is beneficial to improving the sealing degree among the display module 300, the cover plate 100 and the glass layer 200.

As shown in fig. 2, a buffer layer 204 is disposed within the indented region 201. The buffer layer 204 and the indented region 201 are overlapped in fig. 2, and the indented region 201 is clearly shown, but the buffer layer 204 is not shown by hatching.

In this embodiment, the buffer layer 204 is disposed between the first adhesive layer 202 and the second adhesive layer 203, that is, the buffer layer 204 is disposed on the same layer as the glass layer 200 and the buffer layer 204 is in contact with the edge of the glass layer 200. The buffer layer 204 is supported and fixed between the first adhesive layer 202 and the second adhesive layer 203, so as to prevent the first adhesive layer 202 and the second adhesive layer 203 from being adhered to each other in a natural state in which the retracted region 201 is not filled, and the buffer layer 204 is used for indirectly protecting the edge of the glass layer 200, thereby achieving the purpose of increasing the buffer effect. The buffer layer 204 includes a polymer adhesive. Preferably, the buffer layer 204 is one of room temperature vulcanizing silicone rubber, polyurethane rubber, polyvinyl butyral and ethylene-vinyl acetate copolymer.

Fig. 2 mainly shows the edge structure of the display device 1, but the overall structure of the display device 1 is not limited by fig. 2. For example, in one embodiment, the cover 100 is preferably a 3D cover or other flexible cover. When the cover plate 100 is a 3D cover plate, a surface of one side of the cover plate 100 facing the display module 300 is a concave surface, the cover plate 100 is used for accommodating the display module 300, and the cover plate 100 and the display module 300 are attached to each other to form the display device 1. In other embodiments, the cover plate 100 may also be a planar structure.

See also fig. 2. In this embodiment, the display device 1 has a main display area 101 and at least one edge area 102, and a light shielding layer 103 is disposed on a side of the cover plate 100 close to the first adhesive layer 202. The material of the light-shielding layer 103 is an opaque material, and the light-shielding layer 103 is used for shielding light. The light-shielding layer 103 is disposed in the edge region 102 and covers the edge region 102. As shown in fig. 2, an orthogonal projection of the light-shielding layer 103 on the cover plate 100 covers an orthogonal projection of the retracted region 201 on the cover plate 100.

See also fig. 2. The display module 300 has flexibility, and the display module 300 includes a plurality of functional film layers arranged in a stacked manner. As shown in fig. 2, the display module 300 includes a function control layer 301 and a display film layer 302 stacked together, wherein the function control layer 301 is disposed on a side of the glass layer 200 away from the cover plate 100, and the display film layer 302 is disposed on a side of the function control layer 301 away from the glass layer 200. More specifically, in the present embodiment, the display module 300 is disposed on a side of the second adhesive layer 203 away from the glass layer 200, in this case, the functional control layer 301 is disposed on a side of the second adhesive layer 203 away from the glass layer 200, and the display film layer 302 is disposed on a side of the functional control layer 301 away from the second adhesive layer 203.

It should be noted that, in this embodiment, the display film layer 302 is a flexible OLED display panel, and the display film layer 302 includes a thin film transistor array substrate. As a preferred embodiment, the functional control layer 301 is any one of a touch control layer and a polarizer.

In other embodiments, the functional control layer 301 includes, but is not limited to, the touch layer or the polarizer, and the functional control layer 301 may further include other functional film layers, so as to make the performance of the display module 300 better. In this embodiment, when the function control layer 301 is a touch layer, the touch layer may be an on-cell structure, and the touch layer is disposed on the thin film transistor array substrate and connected to the thin film transistor array substrate. The thin film transistor array substrate sequentially comprises a thin film transistor array layer, an OLED light emitting layer and a thin film packaging layer, wherein the OLED light emitting layer comprises an anode, a hole injection layer, a hole transmission layer, an organic light emitting layer, an electron transmission layer, an electron injection layer and a cathode which are sequentially formed above the thin film transistor array substrate, and the thin film packaging layer covers the OLED light emitting layer.

In addition, in other embodiments, the touch layer may also be in-cell structure, that is, the position of the touch layer is replaced by being built in the display film layer 302, that is, the thin film transistor array substrate.

In this embodiment, the display film layer 302 is equivalent to a flexible imaging device and is used for displaying images, and the touch layer is used for collecting sensing signals and implementing a touch function. The touch layer can be selected from a flexible thin film capacitive touch panel.

In a preferred embodiment, the display film layer 302 is an OLED display panel, and when the functional control layer 301 is a polarizer, since the OLED is self-luminous, the OLED may not need a polarizer like an LCD in theory; however, the external light will be reflected back through the cathode, which affects the viewing effect and contrast, and in order to solve the above problems, a polarizer +1/4 λ plate (combined circular polarization) is used; when the external light passes through the polarizer, half of the external light cannot pass through, the half of the external light is deflected by 90 degrees with the original light after passing through the 1/4 lambda plate and being reflected, and the reflected light cannot pass through the polarizer, so that the reflection problem is solved, and therefore, when the functional control layer 301 is the polarizer, the effect of reflecting the external light at the cathode is achieved.

As shown in fig. 2, the display device 1 further includes a back plate layer 400, where the back plate layer 400 is disposed on a side of the display module 300 away from the cover plate 100; wherein the impact resistant layer 500 is disposed on a side of the back plate layer 400 away from the display module 300. More specifically, the back plate layer 400 is disposed on a side of the display film layer 301 away from the cover plate 100, i.e., the back plate layer 400 is located between the impact resistant layer 500 and the display film layer 302. In this embodiment, the back plate layer 400 supports the display module 300. Specifically, since at least one edge of the impact-resistant layer 500 is outwardly extended relative to the cover plate 100, the glass layer 200, and the display module 300, when the display device 1 is subjected to an external impact, an external force may first touch the outwardly extended region 501 of the impact-resistant layer 500, so that the outwardly extended region 501 of the impact-resistant layer 500 can block the external force from impacting the edges of the cover plate 100 and the display module 300, that is, the impact-resistant layer 500 can improve the resistance of the display device 1 against the external force when the edge impact is applied.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a display device 1a according to another embodiment of the present disclosure. Note that, the display device 1a has a market demand for a limitation in an expanded space.

As shown in fig. 3, the display device 1a has a main display area 101a, and the main display area 101a is divided into a bending area 1011a, and a first non-bending area 1012a and a second non-bending area 1013a located at two opposite sides of the bending area 1011 a. In this embodiment, the first non-bending region 1012a and the second non-bending region 1013a are substantially symmetrically disposed, and a bending axis 11a is formed at the bending region 1011a, and the bending axis 11a is specifically disposed at the middle position of the bending region 1011 a. In this embodiment, the folding axis 11a avoiding the folding region 1011a needs to be designed to be partially extended outward, so as to ensure that the folding characteristic near the folding axis 11a is not affected.

In this embodiment, the display device 1a has an impact resistant layer 500 a. The display device 1a is similar to the embodiment shown in fig. 2 described above, but this is understood by referring to fig. 2. The differences of the display device 1a from the display device 1 of the above-described embodiment will be described with emphasis on the points.

As shown in fig. 3, at least one side edge of the impact-resistant layer 500a is extended outward to form an extended region 501a, which may be upper and lower sides or four sides. The flared region 501a corresponds to the first non-bent region 1012a and the second non-bent region 1013 a. As shown in fig. 3, the impact resistant layer 500a has a non-flared region 502a corresponding to the bending region 1011 a. More specifically, the flaring region 501a corresponds to the edge positions of the first non-bending region 1012a and the second non-bending region 1013a, and the non-flaring region 502a corresponds to the edge position of the bending region 1011 a.

Specifically, as shown in fig. 3, the width of the non-flaring region 502a is greater than the width of the bending region 1011a, so that the flaring region 501a avoids the connection between the bending region 1011a and the first and second

non-bending regions

1012a and 1013a, so as not to affect the bending characteristics of the bending region 1011 a. In this embodiment, the edge corresponding to the non-flaring region 502a is not flared, so as to ensure that the bending characteristic near the bending axis 11a is not affected.

As shown in fig. 3, the bending region 1011a has a radius of curvature R and the non-flared region 502a has a width D, wherein D is greater than 2R. . The difference between D and 2R is 2D, and certainly, the larger the value of D, the easier the bending is, but it also means that the width of the non-flaring region 502a is relatively larger, which is not beneficial to protecting the edge, therefore, D should be as small as possible on the premise of ensuring the bending characteristic, so that the width of the non-flaring region 502a is minimized, which is beneficial to protecting the edge. In this embodiment, d may be selected to be 1 mm.

As shown in fig. 3, the display device 1a further includes a bonding region 2 and a chip on film 3, the bonding region 2 and the chip on film 3 are disposed on a side of the first non-bending region 1012a (or the second non-bending region 1013a) away from the bending region 1011a, the chip on film 3 is electrically connected to the main display region 101a through the bonding region 2, and the chip on film 3 further includes a driving chip 31.

The display device 1a provided by the present embodiment has an impact-resistant layer 500a, and the flared region 501a of the impact-resistant layer 500a is located in the first non-bending region 1012a and the second non-bending region 1013 a; the impact resistant layer 500a has a non-outward-expanding region 502a corresponding to the bending region 1011 a; the width of the non-flared region 502a is greater than the width of the inflection region 1011 a. The outward expansion area of the impact resistant layer 500a is touched by external impact, so that the capability of the edge of the display device against external force when the edge of the display device is subjected to external impact is improved, and the bending characteristic near the folding axis 11a is not affected.

The display device provided by the embodiment of the present application is described in detail above, and the principle and the implementation of the present application are explained in this document by applying specific examples, and the description of the above 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 foldable display device, characterized in that the foldable display device comprises:

a cover plate;

the display module is arranged on one side of the cover plate and is provided with a bending area, a first non-bending area and a second non-bending area, wherein the first non-bending area and the second non-bending area are positioned on two opposite sides of the bending area;

the anti-impact layer is arranged on one side, away from the cover plate, of the display module, and is made of a metal material; and

the back plate layer is positioned on one side, far away from the cover plate, of the display module; the anti-impact layer is arranged on one side, far away from the display module, of the back plate layer; wherein the content of the first and second substances,

the back plate layer is flush with the corresponding edge of the display module;

at least one side edge of the impact-resistant layer extends outwards to form an outward extending area compared with the corresponding edge of the display module, the outward extending distance of at least one side edge of the impact-resistant layer compared with the corresponding edge of the display module is greater than or equal to 0.15mm, and the outward extending area of the impact-resistant layer corresponds to the first non-bending area and the second non-bending area; the anti-impact layer is provided with a non-outward-expanding area corresponding to the bending area, and the width of the non-outward-expanding area is larger than that of the bending area.

2. The foldable display device of claim 1, further comprising: the glass layer is arranged between the cover plate and the display module;

at least one side edge of the glass layer retracts relative to the display module to form a retraction area, and a buffer layer is arranged in the retraction area.

3. The foldable display device of claim 2, wherein the material of the glass layer is strengthened ultra-thin glass; the buffer layer comprises a polymer rubber material.

4. The foldable display device of claim 2, wherein the display module comprises a function control layer and a display film layer stacked together, the function control layer is disposed on a side of the glass layer away from the cover plate, and the display film layer is disposed on a side of the function control layer away from the glass layer.

5. The foldable display device of claim 4, wherein the display film layer is a flexible OLED display panel; the functional control layer is at least one of a touch layer or a polarizer.