CN112382200A

CN112382200A - Display device

Info

Publication number: CN112382200A
Application number: CN202011272936.1A
Authority: CN
Inventors: 潘仁浩; 高彪
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-02-19
Anticipated expiration: 2040-11-13
Also published as: CN112382200B

Abstract

The embodiment of the specification discloses a display device. Specifically, the display device includes: a sliding and rolling rotating shaft and a flexible display panel; a plurality of supporting pieces are arranged on the backlight surface of the flexible display panel at intervals; at least a portion of the gaps of adjacent struts are filled with a shape memory material; the flexible display panel is at least partially wound on the sliding winding rotating shaft; the backlight surface is close to the sliding and rolling rotating shaft, and the supporting pieces are arranged along the axial direction vertical to the sliding and rolling rotating shaft; wherein the shape memory material is used to deform when pressed by the support due to the winding of the flexible display panel or to restore and define the position of the support when released due to the unwinding of the flexible display panel. By means of the structure, creep deformation and warpage reduction of the flexible display panel can be overcome, flatness of the flexible display panel is kept, the display effect is guaranteed, and user experience is improved.

Description

Display device

Technical Field

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

Background

With the continuous progress of science and technology, flexible display panels have become a new trend in the development of electronic devices. The sliding and rolling technology is taken as an important direction for the development of the existing flexible display panel, the display area of the flexible display panel can be flexibly switched according to the use requirement of a user, and the use experience of the user is greatly improved. However, in the current roll-sliding technology, the flexible display panel has poor flatness after being unfolded, the warping problem is prominent, poor display is easily caused, and the user experience is reduced.

Disclosure of Invention

In view of the above, one or more embodiments of the present disclosure are directed to a display device, so as to solve the technical problems of poor flatness and prominent warpage of a flexible display panel after being unfolded.

In view of the above objects, one or more embodiments of the present specification provide a display device including: a sliding and rolling rotating shaft and a flexible display panel;

a plurality of supporting pieces are arranged on the backlight surface of the flexible display panel at intervals; at least a portion of the gaps of adjacent struts are filled with a shape memory material;

the flexible display panel is at least partially wound on the sliding winding rotating shaft; the backlight surface is close to the sliding and rolling rotating shaft, and the supporting pieces are arranged along the axial direction vertical to the sliding and rolling rotating shaft;

wherein the shape memory material is used to deform when pressed by the support due to the winding of the flexible display panel or to restore and define the position of the support when released due to the unwinding of the flexible display panel.

Further, gaps of adjacent support members are filled with the shape memory material.

Further, at a position where the flexible display panel is wound around the sliding and rolling rotating shaft, the volume of the shape memory material is smaller than the volume enclosed by the supports at the two sides and the sliding and rolling rotating shaft.

Further, the fill height of the shape memory material is greater than 1/2 of the support height.

Further, the surface of the shape memory material has a depression facing the flexible display panel.

Further, the shape memory material is selected from at least one of shape memory alloy and shape memory ceramic.

Further, the shape memory alloy includes at least one of Au-Cd, Ag-Cd, Cu-Zn-Al, Cu-Zn-Sn, Cu-Zn-Si, Cu-Sn, Cu-Zn-Ga, In-Ti, Au-Cu-Zn, NiAl, Fe-Pt, Ti-Ni-Pd, Ti-Nb, U-Nb, Fe-Mn-Si, and Fe-Cr-Ni-Mn-Si-Co.

Further, a back film is arranged between the support member and the flexible display panel.

Furthermore, the supporting piece is long-strip-shaped, and the extending direction of the supporting piece is consistent with the extending direction of the sliding and rolling rotating shaft.

Further, the length of the support member matches the length of the flexible display panel in the axial direction of the scrolling shaft.

As can be seen from the above description, in the display device provided in one or more embodiments of the present disclosure, a shape memory material is filled in a gap between at least some adjacent supports, and the shape memory material is used to restore and define a position of the support when the flexible display panel is pressed by the supports due to winding of the flexible display panel or when the supports are released due to unwinding of the flexible display panel, so that after the flexible display panel changes from a wound state to an unwound state, the flexible display panel can overcome creep of the flexible display panel to reduce warpage, thereby maintaining flatness of the flexible display panel, ensuring a display effect, and improving a user experience.

Drawings

In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only one or more embodiments of the present specification, and that other drawings may be obtained by those skilled in the art without inventive effort from these drawings.

FIG. 1 is a schematic diagram illustrating a partial structure of a display device according to the related art;

fig. 2 is a schematic partial structural view of a display device provided in one or more embodiments of the present disclosure;

fig. 3 is a schematic structural diagram of a flexible display panel provided in one or more embodiments of the present disclosure;

fig. 4 is a schematic partial structural diagram of a flexible display panel at a position of a sliding roll rotating shaft according to one or more embodiments of the present disclosure;

fig. 5 is a schematic structural diagram of a display device provided in one or more embodiments of the present disclosure.

Detailed Description

For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

It is to be noted that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present specification should have the ordinary meaning as understood by those of ordinary skill in the art to which this disclosure belongs. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Referring to fig. 1, a partial structure of a display device in the related art is schematically illustrated, in which a flexible display panel 1 'is wound around a sliding winding shaft 2'. At this time, the flexible display panel 1 ' wound around the sliding/winding shaft 2 ' is in a bent state, and creep deformation of the flexible display panel 1 ' can be caused when the flexible display panel is in this state for a long time; when the sliding and rolling shaft 2 'rotates to unroll the flexible display panel 1', the flexible display panel is warped and is difficult to form a flat surface.

Based on this, one or more embodiments of the present specification provide a display device. As shown in fig. 2 to 4, the display device specifically includes: a sliding and rolling rotating shaft 2 and a flexible display panel 1; a plurality of supporting pieces 101 are arranged on the backlight surface of the flexible display panel 1 at intervals; at least part of the gaps of adjacent supports 101 are filled with shape memory material 102; the flexible display panel 1 is at least partially wound on the sliding and winding rotating shaft 2; the backlight surface is close to the sliding and rolling rotating shaft 2, and the supporting pieces 101 are arranged along an axial direction perpendicular to the sliding and rolling rotating shaft 2; wherein the shape memory material 102 is used to deform when pressed by the support 101 due to the winding of the flexible display panel 1 (see fig. 4) or to restore and define the position of the support 101 when the support 101 is released due to the unwinding of the flexible display panel 1 (see fig. 3).

Therefore, in the display device provided by this embodiment, the flexible display panel is provided with a plurality of supporting members at intervals along the direction perpendicular to the axial direction of the sliding and rolling rotating shaft, and at least a part of the gaps of the adjacent supporting members are provided with the shape memory material, so that at the position of the flexible display panel wound on the sliding and rolling rotating shaft, the shape memory material is deformed under the action of the supporting members at both sides (see fig. 4); under the condition that the sliding and rolling rotating shaft moves to enable the flexible display panel rolled on the sliding and rolling rotating shaft to be unfolded, the supporting pieces are released, the shape memory material is restored to the original shape, the supporting pieces on the two sides can be effectively limited from being mutually closed (please refer to fig. 3), the warping of the flexible display panel caused by creep deformation is reduced, the surface of the flexible display panel is enabled to be flat, and the display effect is guaranteed.

It should be noted that the supporting member 101 can provide a support for the flexible display panel 1, so as to prevent the two sides of the flexible display panel 1 from warping towards the middle. Meanwhile, the gap between the supporting members 101 provides a space for the shape memory material 102, which does not affect the winding of the flexible display panel 1 on the sliding-winding shaft 2 due to the super elasticity of the shape memory material 102.

Illustratively, the supporting member 101 is adhered to the backlight surface of the flexible display panel 1 by an optical adhesive. It should be noted that the optical adhesive is merely an example, and those skilled in the art can select other materials and structures to implement the connection between the support member 101 and the flexible display panel 1.

Here, the flexible display panel 1 is at least partially wound around the sliding winding shaft 2, for example.

Illustratively, as shown in fig. 5, the display device includes a housing 3, and the sliding winding shaft 2 is rotatably disposed in the housing 3. The flexible display panel 1 comprises a first end 103 and a second end 104 arranged opposite to each other. The first end 103 is fixedly connected in the housing 3 through an elastic member, and the second end 104 is wound around the sliding and rolling shaft 2 and extends to the outside of the housing 3. Thereby, a part of the flexible display panel 1 is wound on the sliding and rolling shaft 2 between the first end 103 and the second end 104, the part of the flexible display panel 1 is in a bending state, and the corresponding shape memory material 102 is extruded and deformed. When the second end 104 is stressed, the sliding and rolling rotating shaft 2 rotates to enable the flexible display panel in a bending state to be unfolded and move towards the outer side of the shell, the corresponding supporting piece 101 is released, and the shape memory material 102 restores to the original state to play a role in supporting the supporting piece 101, so that the surface of the flexible display panel 1 is ensured to be flat.

Illustratively, the display device comprises a shell, and the sliding and rolling rotating shaft 2 is rotatably arranged in the shell. The flexible display panel 1 comprises a first end and a second end arranged opposite to each other. The first end is fixedly connected to the sliding and rolling rotating shaft 2, and the second end 104 is wound around the sliding and rolling rotating shaft 2 and extends to the outer side of the shell 3. It should be appreciated that the second segment 104 may be wound around the spool 2 a plurality of times due to the fixed attachment of the first end to the spool 2. Therefore, the flexible display panel 1 wound around the sliding/rolling shaft 2 is in a bent state, and the corresponding shape memory material 102 is deformed by compression. When the second end 104 is stressed, the sliding and rolling rotating shaft 2 rotates to enable the flexible display panel in a bending state to be unfolded and move towards the outer side of the shell, the corresponding supporting piece 101 is released, and the shape memory material 102 restores to the original state to play a role in supporting the supporting piece 101, so that the surface of the flexible display panel 1 is ensured to be flat.

The display device in the embodiments of the present disclosure may be any electronic device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a vehicle-mounted computer, and the like.

In one or more embodiments of the present disclosure, the gaps of adjacent support members 101 are filled with the shape memory material 102.

By the mode, the shape memory material is arranged in the gap between any two adjacent supporting pieces, and when the flexible display panel is unfolded from the sliding and rolling rotating shaft, each pair of adjacent supporting pieces can be supported by the shape memory material, so that the stress of the flexible display panel is more balanced, and the flatness of the flexible display panel is more favorably maintained.

In addition, the shape memory material fills the gap between the adjacent supporting pieces, so that the strength of the flexible display panel can be increased, and the flexible display panel is prevented from being stacked when being unfolded, so that the strength and the flatness of the flexible display panel are improved.

In one or more embodiments of the present disclosure, at a position where the flexible display panel 1 is wound around the sliding/rolling shaft 2, a volume of the shape memory material 102 is smaller than a volume enclosed by the two side supports 101 and the sliding/rolling shaft 2.

Here, by limiting the volume of the shape memory material, it is avoided that when the flexible display panel 1 is wound on the sliding and rolling shaft 2, the shape memory material cannot be accommodated in a gap between adjacent supporting members due to the excessively large volume of the shape memory material, so that the flexible display panel 1 is regularly wound on the sliding and rolling shaft 2.

As an alternative embodiment, the fill height of the shape memory material 102 is greater than 1/2 of the height of the support 101. By setting the fill height of the shape memory material, it is possible to ensure that the shape memory material has a strong support to the adjacent support, ensuring that the shape memory material has the effect of defining the position of the support.

It should be noted that the height of the supporting member may be greater than or equal to 100 micrometers and less than or equal to 200 micrometers. Such a height can provide both support for the flexible display panel 1 and does not affect the overall performance of the flexible display panel.

As an alternative embodiment, the surface of the shape memory material 102 has a depression towards the flexible display panel.

It should be noted that, by using the concave structure, the contact area between the shape memory material 102 and the support 101 can be increased without increasing the volume of the shape memory material 102, thereby improving the supporting strength of the support 101.

In one or more embodiments of the present description, the shape memory material is selected from at least one of a shape memory alloy, a shape memory ceramic.

Here, the shape memory alloy and the shape memory ceramic have the advantages of mature preparation method, easy control and the like.

In one or more embodiments of the present description, the shape memory alloy includes at least one of Au-Cd, Ag-Cd, Cu-Zn-Al, Cu-Zn-Sn, Cu-Zn-Si, Cu-Sn, Cu-Zn-Ga, In-Ti, Au-Cu-Zn, NiAl, Fe-Pt, Ti-Ni-Pd, Ti-Nb, U-Nb, Fe-Mn-Si, and Fe-Cr-Ni-Mn-Si-Co. Optionally, the shape memory alloy is prepared by a magnetron sputtering process.

In some embodiments, the shape memory ceramic is selected from zirconium dioxide.

As an alternative embodiment, a back film is arranged between the support 101 and the flexible display panel 1. The support member 101 and the shape memory material can be disposed on the back film first, and then the back film is disposed on the backlight surface of the flexible display panel 1. Alternatively, the back film may be adhered to the backlight surface of the flexible display panel 1 by using an optical adhesive. Alternatively, the material of the back film may be high-strength plastic or the like.

By adopting the mode, the damage to the flexible display panel 1 in the process of preparing the shape memory material can be effectively avoided, the cost is reduced, and the quality of the display device is favorably ensured.

In one or more embodiments of the present disclosure, the supporting member is a strip and extends in a direction consistent with an extending direction of the sliding and rolling shaft. By the structure, the flexible display panel can be supported favorably, and the flexible display panel can be wound conveniently.

In one or more embodiments of the present disclosure, a length of the support matches a length of the flexible display panel in an axial direction of the scrolling shaft.

It should be noted that, the matching herein is not intended to limit the length of the support to be equal to the length of the flexible display panel in the axial direction of the scrolling shaft. For different configurations, the length of the support member may be slightly greater than or equal to the length of the flexible display panel in the axial direction of the scrolling shaft.

For example, two side edges of the flexible display panel are disposed in the sliding groove, and the length of the supporting member is slightly greater than the length of the flexible display panel in the axial direction of the sliding and rolling rotating shaft, so that the flexible display panel is effectively supported and prevented from being separated from the sliding groove.

In one or more embodiments of the present disclosure, the support is made of metal. Optionally, the metal is selected from stainless steel, soft iron, and the like. The metal material has high strength and low cost, and is beneficial to being matched with the shape memory material, so that the shape memory material can effectively support the support.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the spirit of the present disclosure, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present description as described above, which are not provided in detail for the sake of brevity.

While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.

It is intended that the one or more embodiments of the present specification embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the present disclosure.

Claims

1. A display device, comprising: a sliding and rolling rotating shaft and a flexible display panel;

2. The display device according to claim 1, wherein gaps of adjacent support members are each filled with the shape memory material.

3. The display device according to claim 1, wherein a volume of the shape memory material at a position where the flexible display panel is wound around the sliding winding shaft is smaller than a volume enclosed by the two side supports and the sliding winding shaft.

4. The display device of claim 3, wherein the fill height of the shape memory material is greater than 1/2 of the support height.

5. A display device as claimed in claim 1, characterized in that the surface of the shape memory material has a depression in the direction of the flexible display panel.

6. The display device according to claim 1, wherein the shape memory material is selected from at least one of a shape memory alloy and a shape memory ceramic.

7. The display device of claim 6, wherein the shape memory alloy comprises at least one of Au-Cd, Ag-Cd, Cu-Zn-Al, Cu-Zn-Sn, Cu-Zn-Si, Cu-Sn, Cu-Zn-Ga, In-Ti, Au-Cu-Zn, NiAl, Fe-Pt, Ti-Ni-Pd, Ti-Nb, U-Nb, Fe-Mn-Si, and Fe-Cr-Ni-Mn-Si-Co.

8. A display device as claimed in claim 1, wherein a back film is arranged between the support and the flexible display panel.

9. The display device as claimed in claim 1, wherein the supporting member is elongated and extends in a direction corresponding to an extending direction of the sliding/rolling shaft.

10. The display device according to claim 9, wherein a length of the support member matches a length of the flexible display panel in an axial direction of the scrolling shaft.