CN114093272A - Flexible display device - Google Patents
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- CN114093272A CN114093272A CN202111486967.1A CN202111486967A CN114093272A CN 114093272 A CN114093272 A CN 114093272A CN 202111486967 A CN202111486967 A CN 202111486967A CN 114093272 A CN114093272 A CN 114093272A
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- flexible display
- display device
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- porous body
- bending
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- 238000005452 bending Methods 0.000 claims abstract description 124
- 239000003292 glue Substances 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 52
- 239000012790 adhesive layer Substances 0.000 claims description 51
- 239000000853 adhesive Substances 0.000 claims description 30
- 230000001070 adhesive effect Effects 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 3
- 239000006262 metallic foam Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- PRORZGWHZXZQMV-UHFFFAOYSA-N azane;nitric acid Chemical compound N.O[N+]([O-])=O PRORZGWHZXZQMV-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The application provides a flexible display device, relates to the technical field of display, and is used for solving the technical problem that a flexible display panel is easy to crease after the flexible display device is bent for multiple times; in the non-bending area, a first accommodating cavity is arranged in the supporting plate, and the first accommodating cavity is provided with an opening communicated with the bonding piece; the first containing cavity is filled with a first porous body, and the first porous body is used for containing viscous state glue liquid generated by the bonding piece after the flexible display device is bent.
Description
Technical Field
The application relates to the technical field of display, in particular to a flexible display device.
Background
With the development of display technology, flexible display devices that can be bent have received much attention. The flexible display device generally includes a supporting plate, an adhesive layer, and a flexible display panel, which are sequentially stacked, and the flexible display panel is bonded to the supporting plate through the adhesive layer. However, after the flexible display device is bent for multiple times, a crease is easily formed on the flexible display panel at a boundary between the bending area and the non-bending area, which affects the display effect of the flexible display device.
Disclosure of Invention
In view of the above problems, embodiments of the present application provide a flexible display device to reduce a crease of a flexible display panel.
In order to achieve the above object, the embodiments of the present application provide the following technical solutions:
the embodiment of the application provides a flexible display device, which is provided with a bending area and a non-bending area which are connected, wherein the flexible display device comprises a supporting plate, a bonding piece and a flexible display panel, wherein the bonding piece is positioned between the supporting plate and the flexible display panel and is used for bonding the supporting plate and the flexible display panel; in the non-bending area, a first accommodating cavity is arranged in the supporting plate, and the first accommodating cavity is provided with an opening communicated with the bonding piece; and a first porous body is filled in the first accommodating cavity and used for accommodating viscous state glue liquid generated by the bonding piece after the flexible display device is bent.
The flexible display device of this application embodiment is provided with the communicating first chamber that holds of opening and bonding piece in owing to being provided with in the backup pad, and first porous body is filled to first holding intracavity, and first porous body contacts with bonding piece. After the flexible display device is bent, viscous-state glue liquid generated by the bonding piece can flow into the first porous body, so that accumulation of the viscous-state glue liquid at the junction of the bending area and the non-bending area of the bonding piece is reduced or eliminated, creases of the flexible display panel at the junction of the bending area and the non-bending area are reduced, and the display effect of the flexible display device is ensured. In addition, the separation of the support plate and the flexible display panel caused by the accumulation of the viscous-state glue solution at the junction of the bending area and the non-bending area of the bonding piece can be avoided, the failure of the inner film layer of the flexible display panel is prevented, and the service life of the flexible display device is prolonged.
In a possible implementation manner, the first accommodating cavity is located at one side of the non-bending area connected with the bending area.
In a possible implementation manner, in the non-bending region, a second accommodating cavity is further arranged in the support plate, the second accommodating cavity and the first accommodating cavity both extend along a second direction, the second direction is parallel to a boundary line between the non-bending region and the bending region, and the second accommodating cavity is communicated with the first accommodating cavity; the second accommodating cavity is filled with a second porous body which is butted with the first porous body.
In a possible implementation manner, the second accommodating cavity and the first accommodating cavity are integrally formed cavities, and the second porous body and the first porous body are integrally formed.
In a possible implementation manner, the thickness of the second accommodating cavity is 1/3-1/2 of the thickness of the supporting plate along a third direction perpendicular to the supporting plate; the minimum distance between the inner surface of the second accommodating cavity and the surface of the support plate facing the adhesive piece is 1/4-1/3 of the thickness of the support plate.
In one possible implementation, the first and second porous bodies each have a porosity of 40% to 60%.
In one possible implementation, the first and second porous bodies are both metal foam.
In a possible implementation manner, the bonding member includes a first adhesive layer, and the first adhesive layer is located between the support plate and the flexible display panel and is bonded to the flexible display panel and the support plate respectively;
in one possible implementation, the width c of the opening in the first direction satisfies the following relation: c-mRh1/h2(ii) a Wherein the first direction is perpendicular to the boundary line between the non-bending area and the outer bending area, m is a first set coefficient, m is an element (4,8), R is the bending radius of the flexible display panel, and h is the bending radius of the flexible display panel1Is the thickness of the support plate in the third direction, h2The first adhesive layer is arranged onThickness in the third direction.
In a possible implementation manner, in the bending region, along a direction of a junction of the non-bending region and the bending region, the support plate is provided with a plurality of first through grooves extending along a second direction, and the plurality of first through grooves are arranged at intervals along the first direction.
In one possible implementation manner, a minimum distance d between one of the first through slots closest to the non-bending region and a boundary between the non-bending region and the bending region satisfies a relation: d-nRh1/h2(ii) a Wherein n is a second set coefficient, n belongs to (2,4), and R is the bending radius of the flexible display panel; h is1Is the thickness of the support plate in the third direction, h2The thickness of the first glue layer in the third direction.
In a possible implementation manner, the bonding member includes a first adhesive layer, a support film, and a second adhesive layer, which are sequentially stacked, where the first adhesive layer is used to bond the support film and the support plate; the second adhesive layer is used for bonding the support film and the flexible display panel.
In a possible implementation manner, in the non-bending region, along a direction of a junction of the non-bending region and the bending region, a plurality of second through grooves extending along a second direction are provided on the support film, and the plurality of second through grooves are provided at intervals along the first direction.
In a possible implementation manner, projections of the plurality of second through grooves on the supporting plate are located in the opening.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic cross-sectional view of a flexible display device according to an embodiment of the present application;
FIG. 2 is a top view of the support plate of FIG. 1;
fig. 3 is a schematic cross-sectional view of a flexible display device according to another embodiment of the present application;
FIG. 4 is a top view of the support membrane of FIG. 3;
fig. 5 is a schematic cross-sectional view of a flexible display device according to another embodiment of the present application;
fig. 6 is a flowchart of a method for manufacturing a flexible display device according to an embodiment of the present disclosure;
FIG. 7 is a schematic illustration of FIG. 6 providing a first porous body and a second porous body;
FIG. 8 is a schematic view of the support plate of FIG. 6 formed;
fig. 9 is a schematic view illustrating a first through groove formed on a support plate in a manufacturing method of a flexible display device according to an embodiment of the present application;
fig. 10 is a schematic view illustrating a first adhesive layer formed on a supporting plate in a method for manufacturing a flexible display device according to an embodiment of the present application;
fig. 11 is a schematic view illustrating a support film formed on a first adhesive layer in a method for manufacturing a flexible display device according to an embodiment of the present disclosure;
fig. 12 is a schematic view illustrating a second adhesive layer formed on a support film in a method for manufacturing a flexible display device according to an embodiment of the present disclosure;
fig. 13 is a schematic view illustrating the flexible display panel of fig. 6 being attached to an adhesive member.
Description of reference numerals:
10. a support plate;
110. a first accommodating chamber;
111. an opening;
120. a first porous body;
130. a second accommodating chamber;
140. a second porous body;
150. a first through groove;
20. a bonding member;
210. a first glue layer;
220. a support film;
221. a second through groove;
230. a second adhesive layer;
30. a flexible display panel;
310. a display layer;
320. a third adhesive layer;
330. a polarizing layer;
340. a cover plate;
341. a fourth adhesive layer;
342. an ultra-thin glass layer;
343. a fifth glue layer;
344. a colorless flexible film layer.
Detailed Description
As described in the background art, the flexible display panel in the related art is susceptible to a crease at the interface of the bending region and the non-bending region. The inventor researches and discovers that the main generation reason of the flexible display panel adhesive layer is that the adhesive layer used for bonding the support plate and the flexible display panel generally comprises a high polymer adhesive material, the high polymer adhesive material in the adhesive layer is easy to deform irreversibly after the adhesive layer is bent for multiple times, and viscous-state adhesive liquid is generated and accumulated at the junction of a bending area and a non-bending area, so that the flexible display panel is jacked or bulges at the junction, creases appear on the flexible display panel, and the display effect of the flexible display device is influenced. And if viscous state glue solution is further piled up, still can cause backup pad and flexible display panel separation for flexible display panel inner film layer inefficacy, thereby make flexible display device can't show.
To above-mentioned technical problem, this application embodiment provides a flexible display device, through be provided with in the backup pad with the first porous body that bonds the piece contact, first porous body is used for holding the viscous state glue solution that flexible display device buckled back bonding piece produced to reduce or eliminate the viscous state glue solution and pile up in the juncture in bending zone and non-bending zone, thereby alleviate flexible display panel's crease, guarantee flexible display device's display effect. Meanwhile, the failure of the inner film layer of the flexible display panel caused by the separation of the support plate and the flexible display panel can be avoided, and the service life of the flexible display device is prolonged.
In order to make the aforementioned objects, features and advantages of the embodiments of the present application more comprehensible, embodiments of the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the present application and not all 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.
It should be noted that, in the embodiment of the present application, the first direction refers to a direction perpendicular to the boundary line between the non-bending region and the bending region, i.e. the x direction as shown in fig. 1; the second direction refers to a direction parallel to the boundary line between the non-bent region and the bent region, i.e., the y direction as shown in fig. 1; the third direction refers to a direction perpendicular to the support plate, i.e., the z-direction as illustrated in fig. 1.
Referring to fig. 1, a flexible display device provided in an embodiment of the present application has a bending region a and a non-bending region B connected to each other. Illustratively, there may be two non-bending regions B, two non-bending regions B are symmetrically disposed on two sides of the bending region a, and both non-bending regions B are connected to the bending region a. The flexible display device can be bent in the bending area A to be opposite to the two non-bending areas B, so that the flexible display device can be folded in a mode similar to a book, the size of the flexible display device can be reduced, and the flexible display device can be conveniently stored and carried. The flexible display device can also flatten the bending area A so that the two non-bending areas B are flush with the bending area A, the display picture of the flexible display device can be increased, and the flexible display device is convenient for a user to watch.
The flexible display device generally includes a support plate 10, an adhesive member 20, and a flexible display panel 30, and the adhesive member 20 is positioned between the support plate 10 and the flexible display panel 30 for adhering the support plate 10 and the flexible display panel 30.
The support plate 10 serves to support the flexible display panel 30. The material of the support plate 10 may be a metal or an alloy. For example, the material of the support plate 10 is titanium, so that the support plate 10 has a light weight and a high strength.
Referring to fig. 1, in the non-bending region B, a first receiving chamber 110 is provided in the support plate 10, and the first receiving chamber 110 is provided with an opening 111 communicating with the adhesive member 20; the first accommodating cavity 110 is filled with a first porous body 120, and the first porous body 120 is used for accommodating viscous-state glue solution generated by the bonding member 20 after the flexible display device is bent.
In the flexible display device according to the embodiment of the present application, since the first receiving cavity 110 having the opening 111 communicating with the adhesive member 20 is disposed in the supporting plate 10, the first receiving cavity 110 is filled with the first porous body 120, and the first porous body 120 contacts with the adhesive member 20. After the flexible display device is bent, the viscous-state glue solution generated by the bonding piece 20 can flow into the first porous body 120, so that the accumulation of the viscous-state glue solution at the junction of the bending area and the non-bending area of the bonding piece 20 is reduced or eliminated, the crease of the flexible display panel 30 at the junction of the bending area and the non-bending area is reduced, and the display effect of the flexible display device is ensured; further avoiding the failure of the inner film layer of the flexible display panel 30 caused by the separation of the support plate 10 and the flexible display panel 30 and prolonging the service life of the flexible display device.
The first receiving cavity 110 may be located at a side where the non-bending region B is connected with the bending region a. Referring to fig. 2, when the first accommodating cavity 110 is located at a side where the non-bending region B is connected to the bending region a, the opening 111 of the first accommodating cavity 110 is located in the non-bending region B and is close to the boundary line S between the non-bending region B and the bending region a.
When the flexible display device is bent, the part of the bonding member 20 located in the bending area a is subjected to an extrusion force towards the two non-bending areas B, and the part of the bonding member 20 located in the two non-bending areas B is not subjected to a force in a direction parallel to the support plate 10, so that the viscous-state glue solution generated by the bonding member 20 flows from the bending area a to the non-bending areas B on both sides and is accumulated at the junction of the non-bending areas B and the bending area a. Set up first holding chamber 110 in the one side that non-bending area B and bending area A are connected, can increase the area of contact of opening 111 and viscous state glue solution of first holding chamber 110 to increase the area of contact of filling first porous body 120 and viscous state glue solution in first holding chamber 110, make viscous state glue solution flow into first porous body 120 as much as possible in, further reduce or eliminate the accumulational fluid state glue solution that glues, thereby alleviate flexible display panel 30's crease, guarantee flexible display device's display effect.
Referring to fig. 1, in the non-bending region B, a second accommodating chamber 130 may be further disposed in the support plate 10, the second accommodating chamber 130 and the first accommodating chamber 110 both extend along a second direction, i.e., along a y direction shown in fig. 1, and the second accommodating chamber 130 is communicated with the first accommodating chamber 110. The second housing chamber 130 is filled with a second porous body 140, and the second porous body 140 is abutted against the first porous body 120. With such an arrangement, the viscous-state glue solution flowing into the first porous body 120 can further flow into the second porous body 140, so that more viscous-state glue solutions can be contained, and accumulation of the viscous-state glue solution at the junction between the bending area a and the non-bending area B can be further reduced or eliminated. In addition, in the supporting plate 10, the viscous-state glue solution flowing into the second porous body 140 and the second porous body 140 may form a buffer absorption layer, and when the flexible display device is impacted, the buffer absorption layer may absorb the impact energy, so as to protect the flexible display device.
Illustratively, the thickness a of the second receiving chamber 130 is the thickness h of the support plate 10 in the third direction, i.e., the z-direction shown in fig. 111/3-1/2. The minimum distance b between the inner surface of the second receiving chamber 130 and the surface of the support plate 10 facing the adhesive member 20 is the thickness h of the support plate 1011/4-1/3.
It is understood that the second receiving cavity 130 and the first receiving cavity 110 may be integrally formed cavities, and the second porous body 140 and the first porous body 120 may also be integrally formed structures. With this arrangement, the difficulty in processing the support plate 10 can be reduced, the connection strength between the second porous body 140 and the first porous body 120 can be increased, and the blocking of the flow of the viscous-state glue solution due to the separation of the second porous body 140 from the first porous body 120 can be prevented.
If the porosity of the first porous body 120 and the second porous body 140 is too small, the viscous glue solution cannot flow into the first porous body 120 and the second porous body 140; if the porosity of the first porous body 120 and the second porous body 140 is too large, the strength of the support plate 10 may be reduced. Therefore, the porosity of the first porous body 120 and the second porous body 140 needs to be set appropriately. Illustratively, the porosity of the first porous body 120 and the second porous body 140 may each be between 40% and 60%.
The porosity is a percentage of the volume of pores in the first porous body 120 or the second porous body 140 to the total volume of the first porous body 120 or the second porous body 140 in a natural state.
Both the first porous body 120 and the second porous body 140 may be a metal foam, such as titanium foam, to reduce the weight of the first porous body 120 and the second porous body 140 and to increase the strength of the first porous body 120 and the second porous body 140. For example, the first and second porous bodies 120 and 140 may be formed by adding a pore-forming agent, such as urea, sodium chloride, ammonium hydrogen nitrate, etc., to a metal material and forming a multi-level pore structure on the metal material using an alkaline heat treatment method to form the first and second porous bodies 120 and 140.
Referring to fig. 1 and 2, in the bending region a, a plurality of first through grooves 150 extending in the second direction, i.e., the y direction, may be further disposed on the support plate 10, and the plurality of first through grooves 150 are spaced apart in the first direction, i.e., the x direction. Illustratively, the plurality of through slots 150 each extend through the support plate 10 in a third direction, i.e., in the z-direction. The plurality of first through grooves 150 disposed in the bending region a can reduce the strength of the portion of the support plate 10 located in the bending region a, and can reduce the internal stress of the portion when the support plate 10 is bent, so as to facilitate bending of the bending region a.
The support plate 10 is provided with an adhesive member 20, and the adhesive member 20 is used to adhere the support plate 10 and the flexible display panel 30. In one possible embodiment of the present application, referring to fig. 3, the adhesive member 20 may include a first adhesive layer 210, and the first adhesive layer 210 is located between the support plate 10 and the flexible display panel 30 and is adhered to the flexible display panel 30 and the support plate 10, respectively. Illustratively, the first adhesive layer 210 may be an optical adhesive, such as a polymer optical adhesive.
The first adhesive layer 210 is communicated with the opening 111 of the first accommodating cavity 110, and the first porous body 120 filled in the first accommodating cavity 110 is in contact with the first adhesive layer 210. After the flexible display device is bent, the viscous-state glue solution generated by the first glue layer 210 can flow into the first porous body 120, so that the accumulated viscous-state glue solution is reduced or eliminated.
Illustratively, in a first direction, i.e., in the x-direction shown in fig. 3, the width c of the opening 111 satisfies the relation: c-mRh1/h2(ii) a Wherein m is a first set coefficient, m is the element (4,8), R is the bending radius of the flexible display panel 30, h1Is the thickness of the support plate 10 in the third direction, i.e., the z-direction; h is2Is the thickness of the first glue layer 210 in the third direction, i.e., the z-direction.
Note that the bending radius of the flexible display panel 30 refers to the bending radius of the flexible display panel 30 when the bending region a is bent.
Exemplarily, referring to fig. 3, a minimum distance d between one first through groove 150 of the plurality of first through grooves 150, which is closest to the non-bending region, and an intersection of the non-bending region B and the bending region a, i.e., an intersection line S of the non-bending region B and the bending region a, satisfies the following relation: d-nRh1/h2(ii) a Wherein n is a second set coefficient, n is an element (2,4), and R is the bending radius of the flexible display panel 30; h is1Is the thickness, h, of the support plate 10 in the third direction, i.e., the z-direction2Is the thickness of the first glue layer 210 in the third direction, i.e., the z-direction.
In another possible embodiment of the present application, referring to fig. 3, the adhesive member 20 may include a first adhesive layer 210, a support film 220, and a second adhesive layer 230 sequentially stacked, wherein the first adhesive layer 210 is used for adhering the support film 220 and the support plate 10. The second adhesive layer 230 is used to bond the support film 220 and the flexible display panel 30. Illustratively, the second adhesive layer 230 may be an optical adhesive, such as a pressure sensitive adhesive. With this arrangement, the support film 220 is located between the support plate 10 and the flexible display panel 30, and the support strength of the support plate 10 can be enhanced. And because the support film 220 is a soft film structure, the support film has impact resistance, when the flexible display device is impacted, the support film 220 can absorb impact energy, and the flexible display device is protected.
Referring to fig. 4, in the non-bending region B, in a direction of a boundary between the non-bending region B and the bending region a, a plurality of second through grooves 221 extending in the second direction, i.e., in the y direction, may be disposed on the support film 220, and the plurality of second through grooves 221 are spaced apart in the first direction, i.e., in the x direction. Illustratively, the plurality of second through grooves 221 each penetrate the support film 220 in the third direction. After the flexible display device is bent for multiple times, the viscous-state glue solution generated by the second glue layer 230 can flow into the second through grooves 221 of the support film 220, so that the accumulated viscous-state glue solution is reduced or eliminated, the crease of the flexible display panel 30 is reduced, and the display effect of the flexible display device is ensured; further avoiding the failure of the inner film layer of the flexible display panel 30 caused by the separation of the support plate 10 and the flexible display panel 30, thereby prolonging the service life of the flexible display device.
Exemplarily, referring to fig. 3, projections of the plurality of second through slots 221 on the support plate 10 are all located within the opening 111. In the y direction, the plurality of second through grooves 221 are disposed opposite to the opening 111 of the first accommodating cavity 110, that is, the plurality of second through grooves 221 are located on the side where the non-bending region B is connected to the bending region a, so that the plurality of second through grooves 221 are all located in the accumulation region of the viscous-state glue solution, the contact area between the plurality of second through grooves 221 and the viscous-state glue solution is increased, the viscous-state glue solution flows into the plurality of second through grooves 221 as much as possible, accumulation of the viscous-state glue solution is further reduced or avoided, creases of the flexible display panel 30 are reduced, and the display effect of the flexible display device is ensured.
The flexible display panel 30 is bonded to the adhesive member 20, and the flexible display panel 30 is used for displaying a screen. In one possible embodiment of the present application, referring to fig. 5, the flexible display panel 30 may include a display layer 310, a third glue layer 320, a polarizing layer 330, and a cover plate 340, which are sequentially stacked. The display layer 310 is used to display a screen. Illustratively, the display layer 310 may include a plurality of light emitting cells, and the plurality of light emitting cells may be arranged in a matrix. In some implementations of the embodiment of the present application, a driving circuit of a plurality of light emitting units may be further included in the display layer 310 to drive the plurality of light emitting units to emit light.
The display layer 310 is provided with a third adhesive layer 320, and the third adhesive layer 320 is used for bonding the display layer 310 and the polarizing layer 330. Illustratively, the third adhesive layer 320 may be an optical adhesive, such as a pressure sensitive adhesive. The polarizing layer 330 is used to reduce the ambient light reflected by the display layer 310 to improve the display effect of the flexible display panel 30.
A cover plate 340 is disposed on the polarizing layer 330, and the cover plate 340 is used for protecting the polarizing layer 330 and the flexible display panel 30. Illustratively, referring to fig. 5, the cover plate 340 may include a fourth glue layer 341, an ultra-thin glass layer 342, a fifth glue layer 343, and a colorless flexible film layer 344, which are sequentially stacked. The ultra-thin glass layer 342 is bonded to the polarizing layer 330 through the fourth adhesive layer 341 to improve the strength of the cover plate 340, and prevent the cover plate 340 from being folded when the flexible display device is bent. The colorless flexible film layer 344 is adhered to the ultra-thin glass layer 342 through a fifth adhesive layer 343 to achieve the bending performance of the cover plate 340. For example, the colorless flexible film layer 344 may be a transparent polyimide or the like.
An embodiment of the present application further provides a manufacturing method of a flexible display device, which includes the following steps with reference to fig. 6:
s110: a first porous body and a second porous body are provided.
Referring to fig. 7, the first and second porous bodies 120, 140 may be a metal foam, such as titanium foam. The first porous body 120 and the second porous body 140 may be abutted so that the glue solution in a viscous state can flow from the first porous body 120 into the second porous body 140. The first porous body 120 and the second porous body 140 may be of an integral structure, and the integral structure can improve the strength of connection between the first porous body 120 and the second porous body 140.
The quantity of a body structure can have two, and two a body structure symmetry sets up to respectively arrange a body structure in every non-bending zone B, thereby can all absorb the viscous state glue solution in every non-bending zone B. The positions of the two integrated structures may be specifically set with reference to preset positions of the bending region a and the non-bending region B, and for example, the first porous body 120 in the two integrated structures may be disposed on a side where the non-bending region B is connected to the bending region a to increase contact areas of the first porous body 120 and the second porous body 140 with the viscous-state glue solution, so that the viscous-state glue solution can flow into the first porous body 120 and the second porous body 140 as much as possible.
S120: and forming a supporting material layer on the surfaces of the first porous body and the second porous body so as to form a supporting plate.
Referring to fig. 8, illustratively, the support material layer may be deposited on the surface of the integrated structure by an electrodeposition method. The material of the support material layer may be titanium or the like. The first containing cavity 110 and the second containing cavity 130 which are wrapped in a whole structure are formed in the supporting material layer. Further, the supporting material above the integrated structure may be removed by etching or the like to form the opening 111 of the first receiving cavity 110 and expose the first porous body 120, thereby forming the supporting plate 10.
For example, referring to fig. 9, after the support plate 10 is formed, a plurality of first through grooves 150 may be further formed on the support plate 10 at portions located in the bending region a to reduce bending stress of the support plate 10 and facilitate bending of the support plate 10. For example, the first through groove 150 may be formed on the support plate 10 by etching.
S130: forming an adhesive member on the support plate.
Illustratively, the adhesive member 20 may include a first adhesive layer 210; the adhesive member 20 may further include a support film 220 and a second adhesive layer 230 in addition to the first adhesive layer 210. Referring to fig. 10, the first glue layer 210 may be formed on the supporting board 10 by coating or the like. The opening 111 of the first receiving cavity 110 is communicated with the first adhesive layer 210, so that the first porous body 120 in the first receiving cavity 110 is in contact with the first adhesive layer 210, and after the flexible display device is bent, the adhesive solution in a viscous state generated by the first adhesive layer 210 can flow into the first porous body 120 and further flow into the second porous body 140. For example, the first adhesive layer 210 may be an optical adhesive, such as a polymer optical adhesive.
Referring to fig. 11, after the first adhesive layer 210 is formed, a support film 220 may be further attached on the first adhesive layer 210. The support film 220 can improve the support strength of the support plate 10 while improving the impact resistance of the flexible display device. For example, the support film 220 may be formed on the first glue layer 210 by coating. Further, a mask may be used in the process of coating the support film 220 to form a plurality of second through grooves 221 in the portion of the support film 220 located in the non-bending region B. Illustratively, the plurality of second through slots 221 may be disposed opposite the opening 111.
Referring to fig. 12, after the support film 220 is formed, a second glue layer 230 may be further formed on the support film 220. For example, the second glue layer 230 may be formed on the support film 220 by coating. For example, the second adhesive layer 230 may be an optical adhesive, such as a pressure sensitive adhesive.
S140: and adhering the flexible display panel to the adhesive member.
Exemplarily, referring to fig. 13, the flexible display panel 30 is adhered on the second adhesive layer 230. The manufacturing method of the flexible display panel 30 according to the embodiment of the present application is not described in detail.
The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It should be noted that references in the specification to "one embodiment," "an embodiment," "a possible embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
It should be readily understood that "on … …", "above … …" and "above … …" in this disclosure should be interpreted in its broadest sense such that "on … …" means not only "directly on something", but also includes the meaning of "on something" with intervening features or layers therebetween, and "above … …" or "above … …" includes not only the meaning of "above something" or "above" but also includes the meaning of "above something" or "above" with no intervening features or layers therebetween (i.e., directly on something).
Furthermore, spatially relative terms, such as "below," "lower," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's illustrated relationship to another element or feature. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may have other orientations (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly as well.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A flexible display device is characterized in that the flexible display device is provided with a bending area and a non-bending area which are connected, the flexible display device comprises a support plate, a bonding piece and a flexible display panel, wherein the bonding piece is positioned between the support plate and the flexible display panel and used for bonding the support plate and the flexible display panel;
in the non-bending area, a first accommodating cavity is arranged in the supporting plate, and the first accommodating cavity is provided with an opening communicated with the bonding piece; and a first porous body is filled in the first accommodating cavity and used for accommodating viscous state glue liquid generated by the bonding piece after the flexible display device is bent.
2. The flexible display device of claim 1, wherein the first receiving cavity is located at a side of the non-bending region connected to the bending region.
3. The flexible display device according to claim 2, wherein a second accommodating cavity is further disposed in the supporting plate in the non-bending region, the second accommodating cavity and the first accommodating cavity both extend along a second direction, the second direction is parallel to an intersection line of the non-bending region and the bending region, and the second accommodating cavity is communicated with the first accommodating cavity; the second accommodating cavity is filled with a second porous body, and the second porous body is butted with the first porous body;
preferably, the second accommodating cavity and the first accommodating cavity are integrally formed cavities, and the second porous body and the first porous body are integrally formed.
4. The flexible display device of claim 3, wherein the thickness of the second receiving cavity is 1/3-1/2 of the thickness of the support plate along a third direction perpendicular to the support plate; the minimum distance between the inner surface of the second accommodating cavity and the surface of the support plate facing the adhesive piece is 1/4-1/3 of the thickness of the support plate.
5. A flexible display device according to claim 3 or 4, wherein the first and second porous bodies each have a porosity of 40% to 60%.
6. A flexible display device according to any of claims 3-5, wherein the first and second porous bodies are both of foamed metal.
7. The flexible display device according to claim 1, wherein the adhesive member comprises a first adhesive layer, the first adhesive layer is located between the support plate and the flexible display panel and is adhered to the flexible display panel and the support plate, respectively;
preferably, the width c of the opening in the first direction satisfies the following relation:
c＝mRh1/h2；
wherein the first direction is perpendicular to the boundary line between the non-bending area and the outer bending area, m is a first set coefficient, m is an element (4,8), R is the bending radius of the flexible display panel, and h is the bending radius of the flexible display panel1Is the thickness of the support plate in the third direction, h2The thickness of the first glue layer in the third direction.
8. The flexible display device according to claim 7, wherein in the bending region, the support plate is provided with a plurality of first through grooves extending in the second direction, the plurality of first through grooves being arranged at intervals in the first direction;
preferably, the minimum distance d between one of the first through grooves closest to the non-bending region and the intersection of the non-bending region and the bending region satisfies the following relation:
d＝nRh1/h2；
wherein n is a second set coefficient, n belongs to (2,4), and R is the bending radius of the flexible display panel; h is1Is the thickness of the support plate in the third direction, h2The thickness of the first glue layer in the third direction.
9. The flexible display device according to claim 1, wherein the bonding member comprises a first adhesive layer, a support film and a second adhesive layer sequentially stacked, the first adhesive layer being used for bonding the support film and the support plate; the second adhesive layer is used for bonding the support film and the flexible display panel.
10. The flexible display device according to claim 9, wherein in the non-bending region, the support film is provided with a plurality of second through grooves extending in a second direction, and the plurality of second through grooves are arranged at intervals in the first direction;
preferably, projections of the plurality of second through grooves on the support plate are all located in the opening.
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