CN112289951A

CN112289951A - Display device and backboard thereof

Info

Publication number: CN112289951A
Application number: CN202011168451.8A
Authority: CN
Inventors: 朱志涛
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-01-29
Anticipated expiration: 2040-10-28
Also published as: CN112289951B

Abstract

The application provides a display device and a backboard thereof, wherein the backboard comprises a substrate base plate; the backing layer is arranged on the substrate base plate and comprises at least one pair of oppositely arranged backing parts; the framework layer is arranged on one side of the liner layer, which is far away from the substrate base plate, and comprises a buffer part and supporting parts arranged at two ends of the buffer part, the buffer part comprises at least one bending structure which is raised towards the direction far away from the substrate base plate, and the length direction of the bending structure forms an included angle with the arrangement direction of a pair of oppositely arranged liner parts; the supporting parts at two ends are respectively arranged on a pair of oppositely arranged cushion parts, and a cavity is formed between the framework layer and the substrate base plate. Compared with the prior art, the extrusion force generated between the materials when the back plate is folded can be reduced.

Description

Display device and backboard thereof

Technical Field

The application relates to the technical field of display, in particular to a display device and a back plate thereof.

Background

Conventional Display devices mainly include Organic Light Emitting Diode (OLED) Display devices and Liquid Crystal Display (LCD) devices. With the increase of the demand of flexible and foldable smart phones and the development of carrying foldable displays of tablet computers, wearable electronic devices and the like, the great development of flexible and foldable display panels is stimulated.

Currently, the OLED display device is stripped by a laser stripping process and then uses a back plate to support and protect the screen. In the process of folding the screen, the inner surface of the back plate is pressed to deform, and meanwhile extrusion force is generated on the adjacent film layers, so that the wave warping phenomenon is generated, and large-angle folding cannot be realized. Therefore, how to reduce the extrusion force generated between the materials when the folding screen is folded becomes a technical problem which is urgently needed to be solved in the development process of realizing large-angle folding of the folding screen.

Disclosure of Invention

The application provides a display device and a back plate thereof, aiming at solving the technical problem of how to reduce the extrusion force generated between materials when a folding screen is folded.

In one aspect, the present application provides a backing plate comprising:

a substrate base plate;

a pad layer disposed on the substrate base plate, the pad layer including at least a pair of oppositely disposed pad portions;

the framework layer is arranged on one side, far away from the substrate base plate, of the cushion layer and comprises a buffering part and supporting parts arranged at two ends of the buffering part, the buffering part comprises at least one bending structure protruding towards the direction far away from the substrate base plate, and the length direction of the bending structure forms an included angle with the arrangement direction of the pair of oppositely arranged substrate parts;

the supporting parts at two ends are respectively arranged on the pair of oppositely arranged cushion parts, and a cavity is formed between the framework layer and the substrate base plate.

In one possible implementation manner of the present application, a side of the bending structure close to the substrate base plate has a cavity, and a width of the cavity in an arrangement direction of the pair of oppositely disposed pad portions gradually decreases in a direction away from the substrate base plate.

In a possible implementation manner of the present application, the buffer portion includes two bending structures, and the two bending structures are sequentially connected along the arrangement direction of the pair of oppositely disposed pad portions.

In a possible implementation manner of the present application, the buffering portion further includes a connection portion, the connection portion is disposed between the two bending structures, and the connection portion is close to one side of the substrate base plate and has a supporting surface.

In a possible implementation manner of the present application, the pad portion includes a first surface and a second surface opposite to each other, the first surface and the second surface are both provided with a colloid, the first surface is connected to the substrate base plate, and the second surface is connected to the support portion.

In one possible implementation of the present application, a portion of the cavity is located between the cushion substrate and the supporting portion.

In one possible implementation of the present application, the material of the substrate base plate includes a metal.

In one possible implementation of the present application, the substrate base plate has a thickness of 0.03mm to 0.2 mm.

In one possible implementation of the present application, the material of the carcass layer comprises a polymer.

In one possible implementation of the present application, the polymer includes polyimide, ethylene terephthalate, and rubber.

In another aspect, the present application provides a display device, including a display panel and the backplane, where the display panel covers a side of the substrate base plate away from the skeleton layer.

A backplate is provided herein, the backplate comprising a substrate base plate; the backing layer is arranged on the substrate base plate and comprises at least one pair of oppositely arranged backing parts; the framework layer is arranged on one side of the liner layer, which is far away from the substrate base plate, and comprises a buffer part and supporting parts arranged at two ends of the buffer part, the buffer part comprises at least one bending structure which is raised towards the direction far away from the substrate base plate, and the length direction of the bending structure forms an included angle with the arrangement direction of a pair of oppositely arranged liner parts; the supporting parts at two ends are respectively arranged on a pair of oppositely arranged cushion parts, and a cavity is formed between the framework layer and the substrate base plate. Compared with the prior art, the backing layer is arranged between the substrate base plate and the framework layer, the supporting portion is arranged on the backing layer, the framework layer is heightened, a cavity is formed between the framework layer and the substrate base plate, the cavity is beneficial to bending of the bending structure, and further the bending structure can provide a supporting effect for the bending area during bending, so that the extrusion force generated by the back plate between materials during folding is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a section of a backplate provided by an embodiment of the present application;

FIG. 2 is a schematic structural view of an embodiment of a back plate provided in the embodiments of the present application, bent inward by 180 degrees;

FIG. 3 is a schematic structural view of an embodiment of a back plate provided in the embodiments of the present application, which is bent outward by 180 degrees;

FIG. 4 is a schematic structural diagram of an embodiment of a display device provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of another embodiment of the display device provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

The embodiment of the application provides a backboard, which comprises a substrate base plate; the backing layer is arranged on the substrate base plate and comprises at least one pair of oppositely arranged backing parts; the framework layer is arranged on one side of the liner layer, which is far away from the substrate base plate, and comprises a buffer part and supporting parts arranged at two ends of the buffer part, the buffer part comprises at least one bending structure which is raised towards the direction far away from the substrate base plate, and the length direction of the bending structure forms an included angle with the arrangement direction of a pair of oppositely arranged liner parts; the supporting parts at two ends are respectively arranged on a pair of oppositely arranged cushion parts, and a cavity is formed between the framework layer and the substrate base plate. The details will be described below.

Referring to fig. 1 to 5, fig. 1 is a schematic structural view of an embodiment of a section of a back plate in an embodiment of the present application, and fig. 2 is a schematic structural view of an embodiment of a back plate provided in the embodiment of the present application, which is bent inward by 180 °; fig. 3 is a schematic structural view of an embodiment in which the back plate provided in the embodiment of the present application is bent outward by 180 °, and fig. 4 is a schematic structural view of an embodiment in which the display device provided in the embodiment of the present application is configured; fig. 5 is a schematic structural diagram of another embodiment of the display device provided in the embodiment of the present application.

With reference to fig. 1 to 3, in the embodiment of the present application, the backplate 10 includes a substrate base plate 11; a pad layer provided on the substrate base plate 11, the pad layer including at least a pair of pad portions 121 disposed oppositely; the framework layer is arranged on one side of the pad layer far away from the substrate 11, the framework layer comprises a buffer part 131 and supporting parts 132 arranged at two ends of the buffer part 131, the buffer part 131 comprises at least one bending structure 1311 which is raised towards the direction far away from the substrate 11, and the length direction of the bending structure 1311 forms an included angle with the arrangement direction of a pair of oppositely arranged pad parts 121; the supporting portions 132 at two ends are respectively disposed on the pair of pad portions 121 disposed oppositely, and a cavity 14 is formed between the skeleton layer and the substrate 11.

In this embodiment, along the first direction, the first direction is inward of the cross-sectional view of the back plate 10, the lengths of the contact portions of the pad portion 121 and the supporting portion 132 with the substrate 11 are equal, and the cavity 14 may be an enclosed cavity 14. Since a cavity 14 formed between the skeleton layer and the substrate 11 can serve as a buffer space for the backplate 10 when being bent, the thickness of the cavity 14 is related to the thickness of the pad portion 121, the thickness of the pad portion 121 can be adjusted according to the substrate 11, the material of the skeleton layer, and the structure of the display panel 20 matched therewith, and the specific thickness of the pad portion 121 is determined according to the actual situation, which is not limited herein.

Referring to fig. 4 and 5, in order to satisfy different requirements, the length of the substrate 11 along the second direction can be adjusted according to the matching requirement, and the second direction is perpendicular to the first direction. The number of the at least one bending structure 1311 may be one, or two or more, and the two bending structures 1311 in the drawings provided in this application are only for illustration, and the specific number of the bending structures 1311 is determined according to the actual situation, and is not limited herein.

Since the back sheet 10 is of the bendable structure 1311, the substrate base plate 11, the cushion layer, and the skeleton layer in the back sheet 10 all need to have a bendable condition, and the materials thereof need to have certain toughness, and the materials of the cushion layer and the skeleton layer may be the same or different.

The opposite pad portions 121 are symmetrically distributed at two ends of the skeleton layer, and a side of the pad portion 121 facing away from the cavity 14 is flush with the supporting portion 132, and since the pad portion 121 is disposed between the substrate base plate 11 and the skeleton layer and is used for lining the skeleton layer and connecting the substrate base plate 11 and the skeleton layer, it should be noted that a specific width of the pad portion 121 is determined according to an actual situation, and is not limited herein.

Compared with the prior art, the backing layer is arranged between the substrate base plate 11 and the framework layer, the supporting portion 132 is arranged on the backing layer 121, and the framework layer is lifted up, so that a cavity 14 is formed between the framework layer and the substrate base plate 11, the cavity 14 is beneficial to bending the bending structure 1311, and further, the bending structure 1311 can provide a supporting effect for the bending area during bending, so that the extrusion force generated between materials during the turnover of the back plate 10 is reduced.

With reference to fig. 1 to 3, in the embodiment of the present application, a side of the bending structure 1311 close to the substrate 11 has a cavity, and a width of the cavity in a direction away from the substrate 11 is gradually reduced along an arrangement direction of a pair of oppositely disposed pad portions 121. In this embodiment, the shape of the cavity on the side of the bending structure 1311 close to the substrate 11 may be a triangle, a semi-ellipse or a semicircle, and the specific shape of the cavity 14 is determined according to the actual situation and is not limited herein.

In the embodiment of the present application, the buffer portion 131 includes two bending structures 1311, and the two bending structures 1311 are sequentially connected along the arrangement direction of the pair of oppositely disposed pad portions 121. In this embodiment, the backplate 10 can be symmetrical to each other along its both sides of central line, the backplate 10 is at the in-process of buckling, every part in its backplate 10 can all be because backplate 10 buckles and deform, thereby generate an internal stress, when backplate 10 is symmetrical structure, its in-process of buckling, the internal stress that produces in the backplate 10 can effectually be divided equally, the internal stress that the buffering portion 131 both sides received is the same, thereby prevent that the buffering portion 131 from being uneven because of the atress for a long time, and lead to the buffering portion 131 to take place irreversible deformation, thereby the stability of backplate 10 has been improved.

In this embodiment, the buffering portion 131 further includes a connecting portion 1312, the connecting portion 1312 is disposed between the two bending structures 1311, and the connecting portion 1312 has a supporting surface on a side close to the substrate 11. In this embodiment, when the backplate 10 is bent inward, the cavity 14 on one side of the bending structure 1311 close to the substrate 11 will expand to two sides, so that the bending structure 1311 can be effectively stretched, and at this time, the joint portion between the bending structure 1311 and the supporting portion 132 and the supporting surface of the joint portion 1312 will abut against the substrate 11, so as to support the substrate 11 and the whole backplate 10, prevent the backplate 10 from being bent excessively, and reduce the pressing force generated between the materials when the backplate 10 is bent inward.

When the backplate 10 is bent outward, the cavity 14 of the bent structure 1311 near the substrate 11 is compressed inward, so that the bent structure 1311 can have enough space to be compressed, and at this time, the joint portion between the bent structure 1311 and the support portion 132 and the support surface of the joint portion 1312 can abut against the substrate 11, thereby supporting the substrate 11 and the whole backplate 10, preventing the backplate 10 from being bent excessively, and reducing the extrusion force generated between the materials when the backplate 10 is bent outward.

In the embodiment of the present application, the pad portion 121 includes a first surface and a second surface opposite to each other, the first surface and the second surface are both provided with a glue, the first surface is connected to the substrate base plate 11, and the second surface is connected to the supporting portion 132. In this embodiment, the adhesive has viscosity, so that the first surface of the pad part 121 can be adhered to the substrate 11, and the second surface of the pad part 121 can be adhered to the supporting part 132, thereby preventing the supporting part 132 from being separated from the pad part 121 or the substrate 11 from being separated from the pad part 121 due to the stress between the materials during the bending process of the back plate 10.

In the embodiment, a part of the cavity 14 is located between the liner substrate and the supporting portion 132. In this embodiment, a part of the cavity 14 in the cavity 14 is located between the substrate 11 and the supporting portion 132, so that a certain distance exists between the supporting portion 132 and the substrate 11, and the buffer space of the buffer portion 131 is larger, thereby increasing the bending range of the backplate 10.

In the embodiment of the present application, the material of the substrate base plate 11 includes metal. In the present embodiment, the substrate base 11 has a certain toughness, and the material of the substrate base 11 includes metal, such as SUS (stainless steel) 30 μm, SUS 40 μm.

In the embodiment of the present application, the thickness of the substrate base plate 11 is 0.03mm to 0.2 mm. In this embodiment, for example, the thickness of the substrate 11 may be 0.03mm, 0.10mm, or 0.15mm, and the specific thickness of the substrate 11 is determined according to actual conditions and is not limited herein.

In an embodiment of the present application, the material of the cushion layer includes a polymer. The polymer is a high molecular weight (usually 10-106) compound formed by repeatedly connecting a plurality of identical and simple structural units through covalent bonds, and high elastic deformation and viscoelasticity are the specific mechanical properties of the polymer.

In the examples of the present application, the polymer includes polyimide, ethylene terephthalate, and rubber.

In order to better implement the back plate 10 in the embodiment of the present application, on the basis of the back plate 10, a display device 40 is further provided in the embodiment of the present application, as shown in fig. 4, the display device 40 includes a display panel 20 and the back plate 10, and the display panel 20 is covered on a side of the substrate 11 away from the skeleton layer.

In this embodiment, the display panel 20 may be a flexible OLED display panel 20. The display device 40 includes a mobile phone, a tablet, a computer, or a notebook. Among them, the OLED display panel 20 is a display panel 20 made of organic electroluminescent diodes. Because of having the self-luminous organic electroluminescent diode, it does not need the backlight, the contrast is high, the thickness is thin, the viewing angle is wide, the reaction rate is fast, can be used in the flexible panel, the use temperature range is wide, the structure and process are simpler and so on excellent characteristic. The OLED is a display device that generates electroluminescence using a multi-layer organic thin film structure, is easy to manufacture, and requires only a low driving voltage.

Compared with the prior art, the backing layer is arranged between the substrate base plate 11 and the framework layer, the supporting portion 132 is arranged on the backing layer 121, the framework layer is lifted, so that the cavity 14 is formed between the framework layer and the substrate base plate 11, the cavity 14 is beneficial to bending the bending structure 1311, further, the bending structure 1311 can provide a supporting effect for a bending area during bending, and therefore extrusion force generated between materials when the backboard 10 is folded is reduced, the display device 40 can be bent for 360 degrees by adopting the backboard 10, and the bending angle range of the bendable display device 40 is greatly improved.

In the embodiment of the present application, with reference to fig. 4 and 5, the length of the display panel 20 can be adjusted along the second direction. Specifically, the length of the display panel 20 may be elongated in the second direction. Note that the display panel 20 is disposed below the substrate base plate 11, but in a practical use, the display panel 20 side faces the user side, and the rear plate 10 side faces away from the user side.

The display device 40 and the backplane 10 thereof provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are described herein by applying specific examples, and the description of the embodiments above is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A backing sheet, comprising:

a substrate base plate;

2. The backplate of claim 1, wherein the side of the flexure structure adjacent the base plate has a cavity that gradually decreases in width in the direction of the alignment of the pair of oppositely disposed pad portions in a direction away from the base plate.

3. A backboard according to claim 1, wherein said cushioning portion comprises two said bent structures, which are connected in series along the arrangement direction of said pair of oppositely arranged pad portions.

4. A backplate according to claim 3 in which the buffer portion further comprises an engagement portion disposed between the two flexure structures, the engagement portion having a support surface on a side thereof adjacent to the base plate of the substrate.

5. A backplate according to claim 1 in which the pad portion comprises first and second opposed faces, each of which is provided with glue, the first face being connected to the base plate of the pad and the second face being connected to the support portion.

6. The backplate of claim 1, wherein a portion of the cavity is located between the backing substrate and the support portion.

7. The backplate of claim 1, wherein the material of the substrate base plate comprises a metal.

8. The backsheet according to claim 1, wherein the substrate base sheet has a thickness of 0.03 to 0.2 mm.

9. The backsheet of claim 1 wherein the material of the carcass layer comprises a polymer.

10. A display device comprising a backplane according to any one of claims 1 to 9 and a display panel overlying a side of the substrate base plate remote from the carcass layer.