CN111968504B - Display panel capable of being bent in solid state and display device - Google Patents
Display panel capable of being bent in solid state and display device Download PDFInfo
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- CN111968504B CN111968504B CN202010760769.9A CN202010760769A CN111968504B CN 111968504 B CN111968504 B CN 111968504B CN 202010760769 A CN202010760769 A CN 202010760769A CN 111968504 B CN111968504 B CN 111968504B
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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
Abstract
The application discloses but display panel and display device of solid-state bending, this display panel includes: a first functional layer, an adhesive layer and a second functional layer which are arranged in a stacked manner; and the hollow deformable piece is positioned in the viscous layer and is communicated with the viscous layer, and a flowable medium is arranged in the deformable piece. Through the mode, the probability of layering between the viscous layer and the adjacent functional layer can be reduced.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a display panel capable of being bent in a solid state and a display device.
Background
The display panel is generally formed by stacking a plurality of functional layers, and adjacent functional layers may be connected and fixed by an adhesive layer. When the display panel is bent in a solid state, due to different bending degrees of different functional layers, the interface of the adhesive layer in contact with the adjacent functional layer is easy to delaminate, and therefore the display panel is prone to package failure.
Disclosure of Invention
The application provides a display panel and a display device that can solid-state buckle, can reduce the probability that produces the layering between viscous layer and the adjacent functional layer.
In order to solve the technical problem, the application adopts a technical scheme that: provided is a solid-state bendable display panel including: a first functional layer, an adhesive layer and a second functional layer which are arranged in a stacked manner; and the hollow deformable piece is positioned in the viscous layer and is communicated with the viscous layer, and a flowable medium is arranged in the deformable piece.
Wherein the deformable member includes a surface that is perpendicular to the stacking direction.
The orthographic projection of the deformable piece on the first functional layer is in a net shape, and the deformable piece is at least located in a preset bending area of the display panel.
Wherein the deformable member comprises: a plurality of hollow first elastic bodies provided at intervals on the same plane perpendicular to the stacking direction; the second elastic bodies are arranged between two adjacent first elastic bodies, and two ends of each second elastic body are respectively communicated with the hollow areas of the adjacent first elastic bodies; wherein the volume of the first elastomer is greater than the volume of the second elastomer, at least a portion of the first elastomer and/or at least a portion of the second elastomer being in communication with the adhesive layer.
Wherein the first elastic body is of a cubic structure; the display panel is provided with a preset bending shaft, at least one side surface of the first elastic body parallel to the preset bending shaft is provided with a first number of second elastic bodies, at least one side surface of the first elastic body perpendicular to the preset bending shaft is provided with a second number of second elastic bodies, and the first number is larger than the second number.
The display panel is provided with regions with different preset bending curvatures, and the volume of the first elastic body in the region with the larger preset bending curvature is larger than that in the region with the smaller preset bending curvature.
Wherein, the orthographic projection of the outer edge of the deformable piece on the first functional layer has a first projection area, the orthographic projection of all the first elastic bodies and all the second elastic bodies on the first functional layer has a second projection area, and the ratio of the second projection area to the first projection area is less than or equal to 50%.
Wherein the hollow inner walls of the first elastomer and the second elastomer are smooth.
Wherein the medium and the adhesive layer are made of the same material.
The first functional layer is a touch layer, and the second functional layer is a polarizing layer.
In order to solve the above technical problem, another technical solution adopted by the present application is: provided is a display device including: the display panel is formed by bending the display panel in a solid state in any embodiment.
Being different from the prior art situation, the beneficial effect of this application is: the display panel capable of being bent in the solid state is internally provided with a first functional layer, a viscous layer and a second functional layer which are arranged in a stacked mode, the viscous layer is internally provided with a hollow deformable piece communicated with the viscous layer, and a flowable medium is arranged in the deformable piece; when the display panel is bent in a solid state, the interface between the first functional layer/the second functional layer and the adhesive layer generates a gap due to the different bending degrees of the first functional layer and the second functional layer, or the deformable piece generates a gap inside due to the different bending degrees of the deformable piece. No matter where the gap is located, the negative pressure of the gap generated at the gap position can enable the medium in the deformable part outside the gap to enter and fill the gap, so as to reduce the bending stress, reduce the probability of layering in the display panel and improve the yield of the display panel.
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, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic structural diagram of an embodiment of a solid-state bendable display panel according to the present application;
FIG. 2 is a schematic top view of one embodiment of the deformable member of FIG. 1;
FIG. 3 is a perspective view of an embodiment corresponding to the dashed box in FIG. 2;
fig. 4 is a schematic structural diagram of an embodiment of a display device according to 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a display panel capable of being bent in a solid state according to the present application. In this embodiment, the solid-state bending refers to a bending manner in which the curvature is fixed after bending, for example, a display panel in a curved television is formed by solid-state bending. The solid-state bendable display panel comprises a hollow deformable part 16, and a first functional layer 10, an adhesive layer 12 and a second functional layer 14 which are arranged in a stacked manner; wherein the deformable member 16 is positioned in the adhesive layer 12 and is in communication with the adhesive layer 12, and wherein a flowable medium is disposed within the deformable member 16. Preferably, adhesive layer 12 wraps around the entire deformable member 16.
Generally, the solid-state bending of the display panel may be performed by bending the first functional layer 10 toward the second functional layer 14, or bending the second functional layer 14 toward the first functional layer 10, that is, the display panel may be folded inward or outward; when the display panel is bent in a solid state, the interface between the first functional layer 10/the second functional layer 14 and the adhesive layer 12 may generate a gap due to the different bending degrees of the first functional layer 10 and the second functional layer 14, or the deformable member 16 may generate a gap inside due to the different bending degrees of the deformable member 16 itself. Regardless of where the gap is located, the negative pressure generated at the gap location may allow the medium in the deformable member 16 outside the gap to enter and fill the gap to reduce bending stresses and reduce the risk of delamination within the display panel. In addition, the addition of deformable element 16 in adhesive layer 12 is equivalent to the addition of a stressed supporting structure in adhesive layer 12, so that bending stress during solid-state bending can be concentrated at the position of deformable element 16, and the original situation that adhesive layer 12 is stressed during solid-state bending is changed into the situation that surface stress is applied, so as to buffer bending stress; and the hollow structure inside the deformable element 16 corresponds to a flow channel along which the medium can be replenished more quickly to the gap location.
In an application scenario, the first functional layer 10 is a touch layer, the second functional layer 14 is a polarizing layer, and the adhesive layer 12 is a pressure sensitive adhesive. The display panel with the structure is mature in process and easy to prepare. Of course, in other embodiments, the first functional layer 10 and the second functional layer 14 may be other functional layers in the display panel, as long as the deformable element 16 added to the adhesive layer 12 is ensured not to affect the light path.
Preferably, the medium in the deformable member 16 is the same as the adhesive layer 12, for example, both are pressure sensitive adhesive, optical adhesive, etc. This design makes it possible to obtain a good compatibility between the medium filled into the gap and the adhesive layer 12, without affecting the adhesion of the adhesive layer 12, and facilitates the mutual fastening of the first functional layer 10 and the second functional layer 14. Of course, in other embodiments, to facilitate the flow of the medium within deformable member 16, the medium may be selected to be a relatively fluid viscous substance, which may be different from adhesive layer 12.
In one embodiment, with continued reference again to fig. 1, the deformable member 16 includes a surface 166, the surface 166 being perpendicular to the stacking direction of the first functional layer 10, the adhesive layer 12, and the second functional layer 14. The contact area of adhesive layer 12 and deformable element 16 in the direction perpendicular to the lamination direction can be increased by the design of surface 166. Subsequently, when the display panel is bent in a solid state, the probability of displacement of the deformable member 16 can be reduced, and the original stress condition of the adhesive layer 12 point during solid state bending can be changed into a large-area stress condition, so as to buffer the bending stress.
Further, referring to fig. 1 and 2, fig. 2 is a schematic top view of an embodiment of the deformable element in fig. 1. The orthographic projection of the deformable piece 16 on the first functional layer 10 is in a net shape, and the deformable piece 16 is at least positioned in a preset bending area of the display panel; the predetermined bending region is a region having a bending curvature of not 0 when the subsequent display panel is bent in a solid state. The deformable member 16 may be made of an organic material with high light transmittance, such as polyvinyl chloride PVC, and the thickness thereof may be greater than 0 micron and less than or equal to 10 microns, for example, 2.5 microns, 5 microns, 7 microns, 9 microns, and the like. The deformable member 16 may be formed by 3D printing or the like. The web design reduces the overall displacement of the deformable member 16 during solid state bending, and allows a portion of the adhesive layer 12 to directly bond to the first functional layer 10 and the second functional layer 14 on opposite sides through the open areas (i.e., the blank areas in fig. 2) of the web to ensure substantial bonding between the first functional layer 10 and the second functional layer 14.
Further, in order to reduce the probability of the deformable member 16 being displaced in the adhesive layer 12 as a whole during solid-state bending, the deformable member 16 may be located in a predetermined bending region and a predetermined non-bending region of the display panel, for example, the outer edge dimension of the deformable member 16 may be comparable to the dimension of the first functional layer 10 or slightly smaller than the dimension of the first functional layer 10.
In addition, with reference to fig. 2, the deformable element 16 specifically includes a plurality of hollow first elastic bodies 160 and a plurality of hollow second elastic bodies 162, and the plurality of first elastic bodies 160 and the plurality of second elastic bodies 162 can be integrally formed. Specifically, the first elastic bodies 160 are spaced apart from each other and are located on the same plane perpendicular to the stacking direction. A second elastic body 162 is disposed between two adjacent first elastic bodies 160, and both ends of the second elastic body 162 are respectively communicated with the hollow regions of the adjacent first elastic bodies 160, so that the hollow regions of the second elastic bodies 162 are communicated with the hollow regions of the first elastic bodies 160. Wherein the volume of the first elastic body 160 is larger than the volume of the second elastic body 162, for example, the volume of the first elastic body 160 is 4 times, 5 times, etc. of the volume of the second elastic body 162; in addition, the second elastic body 162 may be disposed perpendicular to the surface of the first elastic body 160 communicating therewith. Wherein at least a portion of first elastomer 160 and/or at least a portion of second elastomer 162 are in communication with adhesive layer 12. The specific communication manner may be to provide holes on the first elastic body 160 or the second elastic body 162, and the shape of the holes may be circular or square. The above-described manner of forming the deformable member 16 of a mesh structure is simple and easy to implement; when solid state bending occurs, if a gap occurs in the first elastic body 160, the second elastic body 162 is designed in such a way that the medium in the second elastic body 162 moves into the first elastic body 160 at a faster speed under the action of the negative pressure of the gap. Of course, in other embodiments, the mesh structure may be formed in other manners, for example, a plurality of directly connected first elastic bodies 160 may be arranged in a certain manner to form the mesh structure.
In one application scenario, as shown in fig. 2, the display panel provided by the present application has at least one predetermined bending axis L1 parallel to each other, the predetermined bending axis L1 is perpendicular to the stacking direction, and the subsequent display panel can be solid-state bent along the predetermined bending axis L1. The deformable member 16 has an axis of symmetry perpendicular to the predetermined bending axis L1, about which the deformable member 16 is symmetrically disposed. The design mode can make the bending stress of the display panel in the extending direction of the predetermined bending axis L1 be balanced during the solid-state bending process of the display panel along the predetermined bending axis L1.
In another application scenario, please refer to fig. 2 and fig. 3 together, and fig. 3 is a schematic perspective view of an embodiment corresponding to the dashed frame in fig. 2. The first elastic body 160 has a cubic structure, for example, the first elastic body 160 has a rectangular parallelepiped or a square; the second elastic body 162 may have a cubic structure or a cylindrical structure (e.g., a cylinder, etc.), etc. Wherein, at least one side surface P1 of the first elastic body 160 parallel to the predetermined bending axis L1 is provided with a first number of second elastic bodies 162, at least one side surface P2 of the first elastic body 160 perpendicular to the predetermined bending axis L1 is provided with a second number of second elastic bodies 162, and the first number is larger than the second number. For example, the first number may be twice, three times, etc. the second number. When the display panel is bent in a solid state along the predetermined bending axis L1, for example, when the display panel is bent in a transverse direction along the predetermined bending axis L1 in fig. 2, the gap is generally extended in the transverse direction, and the first number of the second elastic bodies 162 extended in the transverse direction is greater than the second number of the second elastic bodies 162 extended in the longitudinal direction, which can make the medium inside the deformable member 16 flow directionally in the transverse direction and supplement the medium in a greater amount, so that the gap can be filled more effectively.
In the present embodiment, as shown in fig. 2 and 3, the second elastic body 162 at the outer edge of the deformable member 16 may be flush with one side surface of the first elastic body 160, and this design may result in a deformable member 16 with high structural stability and easy handling when it is placed in the adhesive layer 12. The second elastic body 162 located at other positions of the deformable member 16 may be located at the center of the first elastic body 160, and the application is not limited thereto.
Further, as shown in fig. 2, the deformable member 16 provided in the present application may be composed of a plurality of interconnected repeating units 164, and adjacent repeating units 164 may be connected to each other by the second elastic body 162. For each repeating unit 164, the second elastic body 162 located at the outer edge position of the repeating unit 164 may be flush with one side surface of the adjacent first elastic body 160; for the other second elastic bodies 162 positioned inside the repeating unit 164, it may be positioned at the center of the first elastic body 160 or may be flush with one side surface of the first elastic body 160. The above design may further enhance the structural stability of the deformable member 16.
In the present embodiment, in order to reduce the frictional resistance to the medium flowing in the deformable member 16, so that the medium can be more easily filled into the gap under the pressure generated by bending, the hollow inner walls of the first elastic body 160 and the second elastic body 162 are smooth. And for the medium, some viscous substances with lower viscosity and better fluidity can be selected.
In still another application scenario, the display panel has regions with different predetermined bending curvatures, and the volume of the first elastic body 160 in the region with the larger predetermined bending curvature may be larger than the volume of the first elastic body 160 in the region with the smaller predetermined bending curvature. For example, the volume of the first elastic body 160 in the region of the predetermined bending curvature is 1.2 times, 1.5 times, etc. the volume of the first elastic body 160 in the region of the predetermined bending region. Generally, when the display panel is bent in a solid state, a region having a large bending curvature is a stress concentration region, and delamination generally occurs in a region having a large bending curvature. When the design mode is adopted, the stress on the area with larger bending curvature can be better dispersed to two sides; and after the bending stress of the first functional layer 10 and the second functional layer 12 is slowly dispersed and stabilized, the medium in the first elastic body 160, which is originally extruded out, can be driven back again under the action of the gap negative pressure, and the gap filling effect is better.
Further, the total area of the holes communicating with adhesive layer 12 formed in the plurality of first elastic bodies 160 located in the region with the larger predetermined bending curvature may be larger than the total area of the holes communicating with adhesive layer 12 formed in the plurality of first elastic bodies 160 located in the region with the smaller predetermined bending curvature. This design may allow the media to fill up through the holes in the first resilient body 160 faster when there is a gap in the area where the predetermined bending curvature is greater.
In another application scenario, referring to fig. 2 again, an orthogonal projection of the outer edge of the deformable member 16 on the first functional layer 10 has a first projected area, an orthogonal projection of all the first elastic bodies 160 and all the second elastic bodies 162 on the first functional layer 10 has a second projected area, and a ratio of the second projected area to the first projected area is less than or equal to 50%, for example, the ratio is 40%, 30%, and so on. This design may reduce the effect of the introduced deformable member 16 on the adhesive function of the adhesive layer 12, enabling the first functional layer 10 and the second functional layer 14 to be fixedly attached to each other.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of a display device according to the present application, where the display device includes a display panel 20, and the display panel 20 is formed by bending the display panel 20 in a solid state as described in any of the above embodiments. For example, the edge of the display panel 20 may be bent in a solid state to form a predetermined curvature. Due to the deformable member (not shown) in the display panel 20, the adhesive layer 200 and the first functional layer 202 and the second functional layer 204 on both sides can be made as free as possible, so as to improve the stability of the display device.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.
Claims (9)
1. A solid state bendable display panel, comprising:
a first functional layer, an adhesive layer and a second functional layer which are arranged in a stacked manner;
the hollow deformable piece is positioned in the viscous layer and is communicated with the viscous layer, and a flowable medium is arranged in the deformable piece; the deformable member includes: a plurality of hollow first elastic bodies arranged at intervals on the same plane perpendicular to the stacking direction; at least one second elastic body is arranged between every two adjacent first elastic bodies, and two ends of each second elastic body are respectively communicated with the hollow areas of the adjacent first elastic bodies; the first elastomer has a volume greater than a volume of the second elastomer, at least a portion of the first elastomer and/or at least a portion of the second elastomer being in communication with the adhesive layer.
2. The display panel according to claim 1,
the deformable member includes a surface perpendicular to the stacking direction.
3. The display panel according to claim 1,
the orthographic projection of the deformable piece on the first functional layer is in a net shape, and the deformable piece is at least positioned in a preset bending area of the display panel.
4. The display panel according to claim 1,
the first elastic body is of a cubic structure;
the display panel is provided with a preset bending shaft, at least one side surface of the first elastic body parallel to the preset bending shaft is provided with a first number of second elastic bodies, at least one side surface of the first elastic body perpendicular to the preset bending shaft is provided with a second number of second elastic bodies, and the first number is larger than the second number.
5. The display panel according to claim 1,
the display panel has regions with different predetermined bending curvatures, and the volume of the first elastic body in the region with the larger predetermined bending curvature is larger than that in the region with the smaller predetermined bending curvature.
6. The display panel according to claim 1,
the orthographic projection of the outer edge of the deformable piece on the first functional layer has a first projection area, the orthographic projection of all the first elastic bodies and all the second elastic bodies on the first functional layer has a second projection area, and the ratio of the second projection area to the first projection area is smaller than or equal to 50%.
7. The display panel according to claim 1,
the hollow inner walls of the first elastic body and the second elastic body are smooth.
8. The display panel according to claim 1,
the medium and the viscous layer are made of the same material; and/or the first functional layer is a touch layer, and the second functional layer is a polarizing layer.
9. A display device, comprising:
a display panel formed by solid state bending of the display panel of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010760769.9A CN111968504B (en) | 2020-07-31 | 2020-07-31 | Display panel capable of being bent in solid state and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010760769.9A CN111968504B (en) | 2020-07-31 | 2020-07-31 | Display panel capable of being bent in solid state and display device |
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| CN111968504A CN111968504A (en) | 2020-11-20 |
| CN111968504B true CN111968504B (en) | 2022-04-19 |
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