Foldable support components, display modules and display devices

Abstract

This invention provides a foldable support member, a display module, and a display device. The foldable support member includes: a first support layer with a through groove in its folding area; a first adhesive layer located on one side of the first support layer; a light-shielding layer located on the other side of the first support layer, the light-shielding layer covering the through groove; and a stress compensation layer located in the first adhesive layer and disposed opposite to the light-shielding layer. This design prevents the foldable support member from arching during folding.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to a foldable support, display module, and display device. Background Technology

[0002] The flexible display module is designed to be foldable, flexible in shape, and easy to carry.

[0003] However, in the prior art, foldable display modules and foldable support components in foldable display modules are prone to arching during the folding process. Summary of the Invention

[0004] The technical problem to be solved by this invention is how to reduce the problem of reverse arching in the foldable support component during the folding process in the prior art.

[0005] To address the aforementioned technical problems, the present invention provides a foldable support member, comprising: a first support layer having a through groove in a folded area; a first adhesive layer located on one side of the first support layer; a light-shielding layer located on the other side of the first support layer, the light-shielding layer covering the through groove; and a stress compensation layer located in the first adhesive layer and disposed opposite to the light-shielding layer.

[0006] Optionally, the stress compensation layer is made of the same material as the light-shielding layer; or, the stress compensation layer is made of a different material than the light-shielding layer.

[0007] Optionally, the difference between the thermal expansion coefficient of the stress compensation layer and the thermal expansion coefficient of the light-shielding layer is less than or equal to 0.0007 / ℃.

[0008] Optionally, the stress compensation layer extends through the first adhesive layer in the thickness direction.

[0009] Optionally, it may also include a second support layer located on the surface of the first adhesive layer opposite to the first support layer.

[0010] Optionally, the thickness of the second support layer is less than the thickness of the first support layer on the side of the through groove.

[0011] Optionally, the thickness of the second support layer is 40 micrometers to 60 micrometers.

[0012] Optionally, the material of the second support layer includes stainless steel.

[0013] Optionally, the density of the first support layer is less than or equal to the density of the second support layer.

[0014] Optionally, it may also include a second adhesive layer located on the surface of the second support layer opposite to the first adhesive layer.

[0015] Optionally, the material of the first support layer includes any one of titanium, carbon fiber, and stainless steel.

[0016] Optionally, the first support layer also has a blind groove that extends from the side surface of the first support layer away from the first adhesive layer into a portion of the thickness of the first support layer, and the blind groove is offset from the folded area.

[0017] The present invention also provides a display module, comprising: a foldable display screen; a back frame surrounding the sides and back of the foldable display screen; a foldable support member of the present invention located between the back frame and the foldable display screen; and a first adhesive layer located between the first support layer and the foldable display screen.

[0018] The present invention also provides a display device, characterized in that it includes the display module of the present invention.

[0019] The technical solution of this invention has the following technical effects:

[0020] The foldable support provided by this invention has a light-shielding layer that covers the through-slot, preventing light from passing through and affecting the display. The first adhesive layer includes a stress-compensating layer disposed opposite to the light-shielding layer. In heated environments, the stress-compensating layer counteracts the thermal stress generated by the light-shielding layer, preventing anti-arching of the folded area of ​​the light-shielding layer and the first support layer, and thus preventing anti-arching of the foldable support during folding.

[0021] The display module provided by the present invention, for the same reason, avoids the reverse arching of the folded area of ​​the light-shielding layer and the first support layer.

[0022] The display device provided by the present invention, for the same reason, avoids the formation of reverse arches in the folded areas of the light-shielding layer and the first support layer. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a foldable support member provided in an embodiment of the present invention;

[0025] Figure 2This is a schematic diagram of the structure of a display module provided in another embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the back frame in a display module provided in another embodiment of the present invention. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] One embodiment of the present invention provides a foldable support member, see reference. Figure 1 ,include:

[0032] A first support layer 100 has a through groove 101 in its folded area;

[0033] A first adhesive layer 110 located on one side of the first support layer 100;

[0034] A light-shielding layer 103 is located on the other side of the first support layer 100, and the light-shielding layer 103 covers the through groove 101;

[0035] A stress compensation layer 111 is located in the first adhesive layer 110 and is disposed opposite to the light-shielding layer 103.

[0036] In this embodiment, the light-shielding layer 103 covers the through-slot 101, preventing light from passing through the through-slot 101 and affecting the display. The first adhesive layer 110 has a stress-compensating layer 111 disposed opposite to the light-shielding layer 103. Thus, in a heated environment, the stress-compensating layer 111 can offset the thermal stress generated by the light-shielding layer 103, preventing the light-shielding layer 103 and the folded area of ​​the first support layer 100 from arching.

[0037] In one embodiment, the difference between the coefficient of thermal expansion of the stress compensation layer 111 and the coefficient of thermal expansion of the light-shielding layer 103 is less than or equal to 0.0007 / ℃. This ensures that the difference between the coefficients of thermal expansion of the stress compensation layer 111 and the light-shielding layer 103 is similar, allowing the stretching of the stress compensation layer 111 under heat to better offset the stretching of the light-shielding layer 103 under heat.

[0038] In one embodiment, the stress compensation layer 111 is made of the same material as the light-shielding layer 103, so that the stress compensation layer 111 also has light-shielding properties, further covering the through groove 101.

[0039] In other embodiments, the material of the stress compensation layer 111 is different from the material of the light-shielding layer 103.

[0040] In one specific embodiment, the light-shielding layer 103 is a Mylar sheet, which is made of PET polyester film. PET polyester film is a film formed by heating dimethyl terephthalate and ethylene glycol with the assistance of a relevant catalyst, followed by transesterification and vacuum polycondensation, and biaxial stretching.

[0041] In one embodiment, the stress compensation layer 111 extends through the first adhesive layer 110 in the thickness direction. In other embodiments, the stress compensation layer is located within a portion of the first adhesive layer in the thickness direction.

[0042] The foldable support further includes a second support layer 120 located on the surface of the first adhesive layer 110 opposite to the first support layer 100. The second support layer 120 serves as a compensating support.

[0043] In one embodiment, the thickness of the second support layer 120 is less than the thickness of the first support layer 100 on the side of the through groove, thus the second support layer 120 has better bending performance when folded. The support performance of the first support layer 100 is better than that of the second support layer 120.

[0044] In one embodiment, the thickness of the second support layer 120 is 40 to 60 micrometers, for example, 50 micrometers. In other embodiments, the thickness of the second support layer 120 is not limited.

[0045] In one embodiment, the thickness of the first support layer 100 on the channel side is 140 micrometers to 160 micrometers, for example, 150 micrometers. In other embodiments, the thickness of the first support layer 100 on the channel side is not limited.

[0046] In one embodiment, the density of the first support layer 100 is less than or equal to the density of the second support layer 120. When the density of the first support layer 100 is less than the density of the second support layer 120, and the thickness of the second support layer 120 is less than the thickness of the first support layer 100 on the side of the through-slot, the lower density of the first support layer 100 can compensate for the increased overall weight of the foldable support due to the greater thickness of the first support layer 100. This allows for a thinner and lighter design of the foldable support.

[0047] The foldable support also includes a second adhesive layer 130 located on the surface of the second support layer 120 opposite to the first adhesive layer 110.

[0048] In one embodiment, the first support layer 100 is made of any one of titanium, carbon fiber, and stainless steel. The second support layer 120 is made of stainless steel.

[0049] In one embodiment, the first support layer 100 further includes a blind groove 102 extending from a surface of the first support layer 100 opposite to the first adhesive layer 110 into a portion of the thickness of the first support layer 100, and the blind groove 102 is offset from the folded area. In other embodiments, the blind groove may not be provided.

[0050] In other embodiments, the second support layer 120 and the second adhesive layer 130 may not be provided.

[0051] Another embodiment of the present invention also provides a display module, see reference. Figure 2 and Figure 3 The foldable display includes: a foldable display screen; a back frame B that surrounds the sides and back of the foldable display screen; a foldable support member as described in the above embodiment, the foldable support member being located between the back frame B and the foldable display screen; and a first adhesive layer 110 located between the first support layer 100 and the foldable display screen.

[0052] The foldable display screen is a flexible display panel. The flexible display panel is an organic light-emitting diode (OLED) display panel or a quantum dot light-emitting diode (QD) display panel.

[0053] The foldable display screen further includes a foldable display area and main display areas located on both sides of the foldable display area, wherein the main display areas are connected to the foldable display area. The foldable display area is disposed opposite to the foldable area of ​​the first support layer.

[0054] The foldable display screen includes: a display screen body 150; a base layer 160 located on the surface of the display screen body 150 facing away from the foldable support member; a first adhesive layer 170 located on the surface of the base layer 160 facing away from the foldable support member; a transparent shock-resistant layer 180 located on the surface of the first adhesive layer 170 facing away from the foldable support member; a second adhesive layer 190 located on the surface of the transparent shock-resistant layer 180 facing away from the foldable support member; a protective layer 200 located on the surface of the second adhesive layer 190 facing away from the foldable support member; a scratch-resistant layer 210 located on the surface of the protective layer 200 facing away from the foldable support member, wherein the hardness of the scratch-resistant layer 210 is greater than the hardness of the protective layer 200; and a back protective layer 140 located between the display screen body 150 and the foldable support member.

[0055] The base layer 160 comprises a PET base layer. The first adhesive layer 170 is made of optical adhesive. The second adhesive layer 190 is made of optical adhesive. The protective layer 200 is made of polyimide.

[0056] Another embodiment of the present invention provides a display device, including the display module of the above embodiment.

[0057] Since the principle by which this display device solves the problem is similar to that of the aforementioned display module, the implementation of the display module in this display device can refer to the implementation of the aforementioned display module, and repeated details will not be repeated. This display device can be any product or component with display functionality, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this display device are understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the present invention.

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A foldable support member, characterized in that, include: A first support layer, wherein the folded area of ​​the first support layer has a through groove; A first adhesive layer located on one side of the first support layer; A light-shielding layer located on the other side of the first support layer, the light-shielding layer covering the through groove; A stress compensation layer located in the first adhesive layer and disposed opposite to the light-shielding layer; The difference between the thermal expansion coefficient of the stress compensation layer and the thermal expansion coefficient of the light-shielding layer is less than or equal to 0.0007 / ℃, so as to use the matching thermal expansion of the two to counteract the warping and arching caused by the thermal deformation of the first support layer.

2. The foldable support member according to claim 1, characterized in that, The stress compensation layer is made of the same material as the light-shielding layer; or, the stress compensation layer is made of a different material than the light-shielding layer.

3. The foldable support member according to claim 1, characterized in that, The stress compensation layer penetrates the first adhesive layer in the thickness direction.

4. The foldable support member according to claim 1, characterized in that, Also includes: A second support layer located on the surface of the first adhesive layer opposite to the first support layer.

5. The foldable support member according to claim 4, characterized in that, The thickness of the second support layer is less than the thickness of the first support layer on the side of the through groove.

6. The foldable support member according to claim 4, characterized in that, The thickness of the second support layer is 40 micrometers to 60 micrometers.

7. The foldable support member according to claim 4, characterized in that, The material of the second support layer includes stainless steel.

8. The foldable support member according to claim 4 or 6, characterized in that, The density of the first support layer is less than or equal to the density of the second support layer.

9. The foldable support member according to claim 4, characterized in that, Also includes: The second adhesive layer is located on the surface of the second support layer that is opposite to the first adhesive layer.

10. The foldable support member according to claim 1, characterized in that, The material of the first support layer includes any one of titanium, carbon fiber, and stainless steel.

11. The foldable support member according to claim 1, characterized in that, The first support layer also has a blind groove, which extends from the side surface of the first support layer away from the first adhesive layer into a portion of the thickness of the first support layer, and the blind groove is offset from the folded area.

12. A display module, characterized in that, include: Foldable display screen; A back frame that surrounds the sides and back of the foldable display screen; The foldable support member as described in any one of claims 1 to 11, wherein the foldable support member is located between the back frame and the foldable display screen; and the first adhesive layer is located between the first support layer and the foldable display screen.

13. A display device, characterized in that, Includes the display module as described in claim 12.

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