CN112382200B - Display device - Google Patents

Display device Download PDF

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Publication number
CN112382200B
CN112382200B CN202011272936.1A CN202011272936A CN112382200B CN 112382200 B CN112382200 B CN 112382200B CN 202011272936 A CN202011272936 A CN 202011272936A CN 112382200 B CN112382200 B CN 112382200B
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China
Prior art keywords
display panel
flexible display
shape memory
memory material
support
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Active
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CN202011272936.1A
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Chinese (zh)
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CN112382200A (en
Inventor
潘仁浩
高彪
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to CN202011272936.1A priority Critical patent/CN112382200B/en
Publication of CN112382200A publication Critical patent/CN112382200A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

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  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)

Abstract

The embodiment of the specification discloses a display device. Specifically, the display device includes: a slide roll spindle and a flexible display panel; the backlight surface of the flexible display panel is provided with a plurality of supporting pieces at intervals; filling the gaps of at least part of the adjacent support members with a shape memory material; the flexible display panel is at least partially wound on the sliding roll rotating shaft; wherein the backlight surface is close to the slide roll rotating shaft, and the supporting pieces are arranged along the axial direction perpendicular to the slide roll 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 recover and define the position of the support when released due to the unwinding of the flexible display panel. By the structure, creep deformation of the flexible display panel can be overcome, warping is reduced, flatness of the flexible display panel is kept, 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 roll-up technology is an important direction of current flexible display panel development, and can flexibly switch the display area of the flexible display panel according to the use requirement of a user, so that the use experience of the user is greatly improved. However, in the current roll-up technology, the flatness of the flexible display panel after being unfolded is poor, the warping problem is prominent, poor display is easily caused, and the use experience of a user is reduced.
Disclosure of Invention
In view of this, one or more embodiments of the present disclosure are directed to a display device to solve the technical problems of poor flatness and prominent warpage of a flexible display panel after being unfolded.
In view of the above object, one or more embodiments of the present specification provide a display device including: a slide roll spindle and a flexible display panel;
the backlight surface of the flexible display panel is provided with a plurality of supporting pieces at intervals; filling the gaps of at least part of the adjacent support members with a shape memory material;
the flexible display panel is at least partially wound on the sliding roll rotating shaft; wherein the backlight surface is close to the slide roll rotating shaft, and the supporting pieces are arranged along the axial direction perpendicular to the slide roll 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 recover and define the position of the support when released due to the unwinding of the flexible display panel.
Further, gaps between adjacent ones of the supports are filled with the shape memory material.
Further, at the position where the flexible display panel is wound around the spool shaft, the volume of the shape memory material is smaller than the volume enclosed by the support pieces on both sides and the spool shaft.
Further, the shape memory material has a fill height greater than 1/2 of the height of the support.
Further, the surface of the shape memory material has a recess facing the direction of the flexible display panel.
Further, the shape memory material is at least one selected from the group consisting of shape memory alloys and shape memory ceramics.
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 provided between the support and the flexible display panel.
Further, the support piece is in a strip shape, and the extending direction of the support piece is consistent with that of the sliding roll rotating shaft.
Further, the length of the support matches the length of the flexible display panel in the axial direction of the spool shaft.
As can be seen from the foregoing, the display device provided in one or more embodiments of the present disclosure fills, in at least a portion of the gaps between adjacent support members, a shape memory material for deforming when the flexible display panel is compressed by the support members due to winding or reducing and defining the position of the support members when the support members are released due to unwinding of the flexible display panel, so that after the flexible display panel is changed from the winding state to the unwinding state, creep of the flexible display panel itself can be overcome to reduce warpage, thereby maintaining flatness of the flexible display panel, guaranteeing display effects, and improving user experience.
Drawings
For a clearer description of one or more embodiments of the present description or of the solutions of the prior art, the drawings that are necessary for the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only one or more embodiments of the present description, from which other drawings can be obtained, without inventive effort, for a person skilled in the art.
FIG. 1 is a schematic view of a portion of a display device according to the related art;
FIG. 2 is a schematic diagram of a portion of a display device according to one or more embodiments of the present disclosure;
FIG. 3 is a schematic diagram of a flexible display panel according to one or more embodiments of the present disclosure;
FIG. 4 is a schematic view of a portion of a flexible display panel according to one or more embodiments of the present disclosure in a position of a sliding roller;
fig. 5 is a schematic diagram of another structure of a display device according to one or more embodiments of the present disclosure.
Detailed Description
For the purposes of promoting an understanding of the principles and advantages of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same.
It is noted that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present disclosure should be taken in a general sense as understood by one of ordinary skill in the art to which the present disclosure pertains. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Referring to fig. 1, a part of a structure of a display device in the related art is schematically shown, and a flexible display panel 1 'is wound on a roll shaft 2'. At this time, the flexible display panel 1' wound around the slide winding shaft 2' is in a bent state, and creep occurs in the flexible display panel 1' after a long time of such a state; when the roll shaft 2 'rotates to unwind the flexible display panel 1', the portion of the flexible display panel may warp to make it 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 slide roll 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; gap filling shape memory material 102 of at least part of adjacent support 101; the flexible display panel 1 is at least partially wound on the slide winding shaft 2; wherein the backlight surface is close to the slide roll rotating shaft 2, and the supporting pieces 101 are arranged along the axial direction perpendicular to the slide roll 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 the embodiment, the flexible display panel is provided with the plurality of supporting pieces at intervals along the axial direction of the vertical sliding roll rotating shaft, and at least part of the gaps between the adjacent supporting pieces are provided with the shape memory material, so that the shape memory material deforms under the action of the supporting pieces at two sides at the position of the flexible display panel wound on the sliding roll rotating shaft (refer to fig. 4); under the condition that the flexible display panel rolled on the sliding roll rotating shaft is unfolded due to the movement of the sliding roll rotating shaft, the supporting pieces are released, the shape memory materials are restored to the original shape, the supporting pieces on two sides can be effectively limited to be mutually close (refer to fig. 3), the warping of the flexible display panel caused by creep is reduced, the surface of the flexible display panel is kept flat, and the display effect is guaranteed.
The supporting member 101 can provide support for the flexible display panel 1, so as to avoid warping of both side edges of the flexible display panel 1 toward the middle. At the same time, 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 roll 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 optical adhesive. It should be noted that the optical adhesive is only an example, and those skilled in the art can select other materials and structures to connect the supporting member 101 and the flexible display panel 1.
Here, the flexible display panel 1 is at least partially wound around the slide winding shaft 2, for example.
Illustratively, as shown in fig. 5, the display device includes a housing 3, and the spool 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 each other. The first end 103 is fixedly connected to the inside of the housing 3 through an elastic member, and the second end 104 is wound around the spool shaft 2 and extends to the outside of the housing 3. Thus, a portion of the flexible display panel 1 is wound around the roll shaft 2 between the first end 103 and the second end 104, and the portion of the flexible display panel 1 is in a bent state, and the corresponding shape memory material 102 is deformed by extrusion. When the second end 104 is stressed, the sliding roll rotating shaft 2 rotates to enable the flexible display panel in a bending state to be unfolded and move to the outer side of the shell, the corresponding supporting piece 101 is released, the shape memory material 102 is restored to the original state to play a role of supporting the supporting piece 101, and the surface smoothness of the flexible display panel 1 is ensured.
Illustratively, the display device includes a housing, and the spool shaft 2 is rotatably disposed in the housing. 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 spool shaft 2, and the second end 104 is wound around the spool shaft 2 and extends to the outside of the housing 3. It should be appreciated that since the first end is fixedly attached to the spool shaft 2, the second section 104 may be wound around the spool shaft 2 multiple times. Thus, the flexible display panel 1 wound on the slide roll shaft 2 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 roll rotating shaft 2 rotates to enable the flexible display panel in a bending state to be unfolded and move to the outer side of the shell, the corresponding supporting piece 101 is released, the shape memory material 102 is restored to the original state to play a role of supporting the supporting piece 101, and the surface smoothness of the flexible display panel 1 is ensured.
It should be noted that, the display device in the embodiment 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, gaps between adjacent ones of the support members 101 are filled with the shape memory material 102.
Through the mode, gaps of any adjacent supporting pieces are provided with the shape memory material, and when the flexible display panel is unfolded from the sliding roll 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 smoothness of the flexible display panel is more favorable.
In addition, the shape memory material fills the gaps between the adjacent supporting pieces, so that the strength of the flexible display panel can be increased, stacking of the flexible display panel during unfolding is avoided, and the strength and 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 roll shaft 2, the volume of the shape memory material 102 is smaller than the volume enclosed by the two side supporting members 101 and the roll shaft 2.
Here, by limiting the volume of the shape memory material, it is avoided that the gap between the adjacent supporting pieces cannot accommodate the shape memory material due to the excessively large volume of the shape memory material when the flexible display panel 1 is wound around the roll rotating shaft 2, thereby ensuring that the flexible display panel 1 is regularly wound around the roll rotating shaft 2.
As an alternative embodiment, the shape memory material 102 has a fill height greater than 1/2 of the height of the support 101. By setting the filling height of the shape memory material, it is ensured that the shape memory material has a strong support for 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 support member may be 100 micrometers or more and 200 micrometers or less. Such a height is sufficient to provide support for the flexible display panel 1 without affecting the overall performance of the flexible display panel.
As an alternative embodiment, the surface of the shape memory material 102 has a depression facing the direction of the flexible display panel.
It should be noted that, the use of the concave structure can increase the contact area between the shape memory material 102 and the supporting member 101 without increasing the volume of the shape memory material 102, thereby improving the supporting strength of the supporting member 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 herein, 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 provided between the support 101 and the flexible display panel 1. The support 101 and the shape memory material can be disposed on the back film, and then the back film is disposed on the back surface of the flexible display panel 1. Alternatively, the back film may be adhered to the back surface of the flexible display panel 1 by using an optical adhesive. Alternatively, the material of the back film may be a high-strength plastic or the like.
By the mode, 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 guaranteed.
In one or more embodiments of the present disclosure, the support member is elongated and has an extension direction consistent with an extension direction of the spool shaft. Such a structure can ensure that the flexible display panel is provided with favorable support, and is convenient for the flexible display panel to realize winding.
In one or more embodiments of the present disclosure, the length of the support matches the length of the flexible display panel in the axial direction of the spool shaft.
It should be noted that the matching herein is not intended to limit the length of the support member to be equal to the length of the flexible display panel in the axial direction of the spool shaft. For different configurations, the length of the support may be slightly greater than or equal to the length of the flexible display panel in the axial direction of the spool shaft.
The length of the supporting piece is slightly greater than the length of the flexible display panel in the axial direction of the sliding roll rotating shaft, so that the effective support of the flexible display panel is realized and the flexible display panel can be prevented from being separated from the sliding groove.
In one or more embodiments of the present disclosure, the material of the support member is metal. Alternatively, the metal is selected from stainless steel, soft iron, and the like. Here, the metal material is not only high in strength and low in cost, but also is beneficial to being matched with the shape memory material, so that the shape memory material can be ensured to have an effective supporting effect on the supporting piece.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; combinations of features of the above embodiments or in different embodiments are also possible within the spirit of the present disclosure, steps may be implemented in any order, and there are many other variations of the different aspects of one or more embodiments 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 those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
The present disclosure is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Any omissions, modifications, equivalents, improvements, and the like, which are within the spirit and principles of the one or more embodiments of the disclosure, are therefore intended to be included within the scope of the disclosure.

Claims (7)

1. A display device, comprising: a slide roll spindle and a flexible display panel;
the backlight surface of the flexible display panel is provided with a plurality of supporting pieces at intervals; filling the gaps of at least part of the adjacent support members with a shape memory material;
the flexible display panel is at least partially wound on the sliding roll rotating shaft; wherein the backlight surface is close to the slide roll rotating shaft, and the supporting pieces are arranged along the axial direction perpendicular to the slide roll rotating shaft;
wherein the shape memory material is for deforming when pressed by the support due to the flexible display panel being wound or for recovering and defining a position of the support when released due to the flexible display panel being unwound;
wherein, at the position that the flexible display panel is wound on the sliding roll rotating shaft, the volume of the shape memory material is smaller than the volume enclosed by the support pieces at two sides and the sliding roll rotating shaft, and the filling height of the shape memory material is larger than 1/2 of the height of the support pieces;
the supporting piece is made of metal, and the height of the supporting piece is more than or equal to 100 micrometers and less than or equal to 200 micrometers;
the surface of the shape memory material has a recess facing the direction of the flexible display panel.
2. The display device of claim 1, wherein gaps between adjacent ones of the support members are filled with the shape memory material.
3. 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.
4. A display device according to claim 3, 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.
5. The display device according to claim 1, wherein a back film is provided between the support and the flexible display panel.
6. The display device according to claim 1, wherein the support member is elongated and has an extending direction that coincides with an extending direction of the slide roller shaft.
7. The display device according to claim 6, wherein a length of the support matches a length of the flexible display panel in an axial direction of the spool shaft.
CN202011272936.1A 2020-11-13 2020-11-13 Display device Active CN112382200B (en)

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CN112382200B true CN112382200B (en) 2023-07-25

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