CN110648593A - Cover plate and display device - Google Patents
Cover plate and display device Download PDFInfo
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- CN110648593A CN110648593A CN201910929386.7A CN201910929386A CN110648593A CN 110648593 A CN110648593 A CN 110648593A CN 201910929386 A CN201910929386 A CN 201910929386A CN 110648593 A CN110648593 A CN 110648593A
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- layer
- cover plate
- bending
- apron
- region
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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 provides a cover plate and a display device, and relates to the technical field of display. This apron includes: the cover plate comprises a first cover plate layer, a second cover plate layer and a first bonding layer, wherein the first cover plate layer and the second cover plate layer are stacked, and the first bonding layer is bonded with the first cover plate layer and the second cover plate layer. In the embodiment of this application, through the improvement layer that sets up the first apron layer, adhesive linkage and the second apron layer that stack up the setting in proper order with the apron, when buckling towards first apron layer, compare in the first apron layer and the second apron layer condition as an organic whole structure, effectively reduced the bending stress that first apron layer one side was kept away from to the second apron layer to the cracked problem of rete of flexible display device when buckling has effectively been improved.
Description
Technical Field
The application relates to the technical field of display, in particular to a cover plate and a display device.
Background
With the development of flexible display technology, flexible display devices are increasingly popular in the market. However, the problem of cover plate fracture still exists when the flexible display device produced at present is subjected to bending test.
Therefore, how to improve the breakage of the cover plate when the flexible display device is bent becomes an urgent problem to be solved.
Disclosure of Invention
In view of the above, embodiments of the present application are directed to providing a cover plate and a display device, so as to solve the problem of the cover plate breaking when a flexible display device is bent in the prior art.
One aspect of the present application provides a cover plate, including: the first cover plate layer and the second cover plate layer are arranged in a stacked mode; and an adhesive layer adhering the first cover sheet layer and the second cover sheet layer.
In one embodiment of the present application, the first cover sheet layer includes a first inflection region including at least one through-hole.
In one embodiment of the present application, the first cover sheet layer further comprises at least one first non-bent region, the first bent region comprising a plurality of the through holes; wherein the size of the through hole is gradually reduced in a direction from the symmetry axis of the first bending region to the first non-bending region.
In an embodiment of the present application, in the first bending region, the plurality of through holes are arranged in a matrix.
In one embodiment of the present application, in the first bending region, a plurality of the through holes are arranged in a plurality of rows; and in two adjacent rows, the through holes are arranged in a staggered manner.
In one embodiment of the present application, the first cover sheet layer includes two first non-bending regions disposed at opposite sides of the first bending region, respectively.
In one embodiment of the present application, the second cover sheet layer includes a second bending region disposed opposite the first bending region of the first cover sheet layer,
wherein the first bending zone comprises a discontinuity for dividing the first cover sheet layer into at least two mutually independent portions.
Another aspect of the present application provides a display device, including: a cover plate according to any one of the above first aspects; and a touch panel; the touch panel is arranged on one side, far away from the second cover plate layer, of the first cover plate layer.
In an embodiment of the present application, the display device further includes a display panel, wherein the display panel is disposed on a side of the touch panel away from the cover plate.
In one embodiment of the present application, the display device further includes a polarizing layer, wherein the polarizing layer is disposed between the first cover plate layer and the touch panel.
In the embodiment of this application, through setting up the first apron layer, adhesive linkage and the second apron layer that set up to range upon range of setting gradually with the apron, when buckling towards first apron layer, compare in the condition of first apron layer and the structure as an organic whole of second apron layer, effectively reduced the bending stress that first apron layer one side was kept away from to the second apron layer to the cracked problem of rete of flexible display device when buckling has effectively been improved.
Drawings
Fig. 1 is a schematic structural view of a cover plate according to an embodiment of the present application.
Fig. 2 is a schematic structural view of a cover plate according to another embodiment of the present application.
Fig. 3 is a schematic block diagram of a first cover sheet layer according to one embodiment of the present application.
Fig. 4 is a schematic structural view of a cover plate according to still another embodiment of the present application.
Fig. 5 is a schematic structural diagram of a display device according to an embodiment of 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.
Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
In the flexible display device, each film layer has certain bending resistance characteristics so as to meet the bending function of the flexible display device. However, the film layers have different bending resistance degrees, so that the flexible display device has the problem of film layer fracture in the bending process. For example, the cover of the flexible display device is easily broken during bending.
Specifically, it was found by analysis that a broken film layer can include two cases, full and partial breakage, respectively. For complete fracture, it may be meant that the crack extends from one side of the film layer to the other. That is, the crack spans the entire film layer. For partial fracture, it may be that the crack starts from one side of the film layer, but does not extend to the other side of the film layer, only to a certain area of the film layer. That is, the crack does not span the entire film layer. Based on these two cases, it can be concluded that the crack may be generated from one side of the film layer, and the crack is formed after the crack is extended. Therefore, the side of the film where cracking occurs is the side of the film where the bending stress is the greatest.
For example, in the case of a cover plate of a flexible display device, when the flexible display device is folded outward, and the cover plate is observed, it is found that cracks are generated on a side of the cover plate away from the display panel and extend to a side of the cover plate close to the display panel. Therefore, the bending stress on the side of the cover plate far away from the display panel is the largest. In order to verify the reliability of the analysis, the inventor also performs simulation analysis on the bending process of the flexible display device, and the simulation result also shows that the side of the cover plate far away from the display panel is subjected to the maximum bending stress.
Therefore, if the bending stress on the side of the cover plate where the bending stress is the largest can be reduced, the problem of the cover plate being broken when being bent can be effectively improved.
Fig. 1 is a schematic structural view of a cover plate 1 according to an embodiment of the present application.
Based on this, the embodiment of the present application provides a cover plate 1. As shown in fig. 1, the cover sheet 1 may include a first cover sheet layer 11 and a second cover sheet layer 13 which are stacked, and an adhesive layer which adheres the first cover sheet layer 11 and the second cover sheet layer 13. For the sake of distinction from other adhesive layers hereinafter, the adhesive layer adhering the first cover sheet layer 11 and the second cover sheet layer 13 may be referred to as a first adhesive layer 12, and it is understood that the cover sheet referred to in this embodiment is a cover sheet of a flexible display device, that is, a cover sheet for a flexible display panel.
Since the first cover sheet layer 11 and the second cover sheet layer 13 are bonded by the first adhesive layer 12, the first cover sheet layer 11 and the second cover sheet layer 13 are not an integral structure but are independent of each other. However, the first cover board layer 11 and the second cover board layer 13 of the integrated structure may be cover boards which are easily broken by bending stress in the prior art. Here, the material of the first cover plate layer 11 and the second cover plate layer 13 may be the same as or different from that of the breakable cover plate.
When bending towards the first cover plate layer 11, for the area where bending occurs, if the cover plate 1 provided by the embodiment of the present application is replaced with the above-mentioned easily-breakable cover plate, that is, the first cover plate layer 11 and the second cover plate layer 13 which are independent of each other are replaced with the first cover plate layer 11 and the second cover plate layer 13 which are of an integral structure, because the bending deformation amount of the second cover plate layer 13 on the side close to the first cover plate layer 11 is equal to the bending deformation amount of the first cover plate layer 11 on the side close to the second cover plate layer 13, the bending stress on the side of the second cover plate layer 13 far away from the first cover plate layer 11 is the largest. In such a bending situation, if the first cover plate layer 11 and the second cover plate layer 13 of the integrated structure are replaced by the first cover plate layer 11 and the second cover plate layer 13 which are independent of each other, because the bending deformation of the second cover plate layer 13 close to the first cover plate layer 11 can be smaller than the bending deformation of the first cover plate layer 11 close to the second cover plate layer 13, compared with the case where the first cover plate layer 11 and the second cover plate layer 13 are of the integrated structure, the bending deformation of the second cover plate layer 13 far away from the first cover plate layer 11 is reduced, and thus the bending stress of the second cover plate layer 13 far away from the first cover plate layer 11 is effectively reduced.
The reduction of the bending stress of the second cover sheet layer 13 on the side away from the first cover sheet layer 11 corresponds to the reduction of the bending stress of the breakable cover sheet on the side where the bending stress is the greatest.
Here, the first cover plate layer 11 and the second cover plate layer 13, which are independent of each other, reduce stress concentration, that is, the provision of the first adhesive layer 12 reduces the interaction force between the first cover plate layer 11 and the second cover plate layer 13, as compared with the case where the first cover plate layer 11 and the second cover plate layer 13 are of an integral structure, thereby reducing the bending stress of the second cover plate layer 13 on the side away from the first cover plate layer 11.
Further, the first adhesive layer 12 is provided so that the first cover sheet layer 11 and the second cover sheet layer 13 are held together, thereby preventing the first cover sheet layer 11 or the second cover sheet layer 13 from being lifted up when bent.
Here, the thickness of the related art cover plate may be 200 micrometers or less, and accordingly, the total thickness of the first cover plate layer 11, the first adhesive layer 12, and the second cover plate layer 13 may also be 200 micrometers or less. Specifically, the thickness of the first cover plate layer 11 and the thickness of the second cover plate layer 13 may each be 100 micrometers or less. For example, the thickness of the first cover sheet layer 11 is 80 micrometers, and the thickness of the second cover sheet layer 13 is 90 micrometers.
In the embodiment of the application, through setting up first apron layer 11, first adhesive linkage 12 and the second apron layer 13 that set up as range upon range of setting gradually with apron 1, when buckling towards first apron layer 11, compare in the first apron layer 11 and the second apron layer 13 condition as an organic whole structure, effectively reduced the bending stress that first apron layer 11 one side was kept away from to second apron layer 13 to effectively improved apron 1 easy fracture problem that produces when buckling.
Fig. 2 is a schematic structural view of a cover plate 1 according to another embodiment of the present application.
In one embodiment of the present application, as shown in fig. 2, the first cover plate layer 11 may include a first bending region 111, and the first bending region 111 may include at least one through hole. For convenience of description, the through hole may be referred to as a first through hole 112.
Specifically, the first bending region 111 may refer to a region where the first cover sheet layer 11 can be bent. The first bending region 111 may correspond to a bending region of the display panel 5. Here, the arrangement of the first through hole 112 may reduce an interaction area between the first cover plate layer 11 and the second cover plate layer 13, thereby further reducing an interaction force between the first cover plate layer 11 and the second cover plate layer 13, further reducing stress concentration between the first cover plate layer 11 and the second cover plate layer 13, and further reducing a bending stress on a side of the second cover plate layer 13 away from the first cover plate layer 11.
For the case where a plurality of first through holes 112 are provided, the embodiment of the present application does not limit the number of the first through holes 112. In addition, the arrangement order of the first through holes 112 may be regular or irregular. For example, when the plurality of first through holes 112 are regularly arranged, the plurality of first through holes 112 may be arranged in a matrix. In addition, the plurality of first through holes 112 may also be arranged in a plurality of rows, and in two adjacent rows, the first through holes 112 are arranged in a staggered manner. Further, the shape of the first through hole 112 may be any shape, for example, a circle, a square, a diamond, or the like.
Fig. 3 is a schematic structural view of the first cover sheet layer 11 according to an embodiment of the present application.
In one embodiment of the present application, as shown in fig. 3, the first cover sheet layer 11 may further include a first non-bent region 113, and the first bent region 111 may include a plurality of first through holes 112. The size of the first through-hole 112 gradually decreases in a direction a directed from the symmetry axis b of the first inflection region 111 toward the first non-inflection region 113. Here, the direction a may be perpendicular to the symmetry axis b.
Specifically, for a display device capable of being folded in half, the number of the first non-bending regions 113 may be two, and the first non-bending regions are disposed on two opposite sides of the first bending region 111. Here, the first inflection region 111 and the first non-inflection region 113 may be integrally connected, i.e., seamlessly connected. The axis of symmetry b may refer to an axis that gives the first inflection zone 111 an axisymmetric configuration. The axis of symmetry b may be parallel to the bending axis of the first bending region 111.
In the bent state, the bending stress applied to the first bending region 111 at the symmetry axis b is the largest, and the bending stress gradually decreases in a direction from the symmetry axis b to the first non-bending region 113. In order to achieve uniform distribution of bending stress between the first cover sheet layer 11 and the second cover sheet layer 13, the size of the first through hole 112 may be gradually reduced in a direction a from the symmetry axis b of the first bending region 111 to the first non-bending region 113, that is, the bending stress near the symmetry axis b of the first bending region 111 is the largest, so that the first through hole 112 with a larger area is disposed at the portion, and the distribution of the bending stress is relieved to the largest extent, whereas the bending stress is reduced relative to the first bending region 111 at the portion, close to the first non-bending region 113, of the first bending region 111, and accordingly, the first through hole 112 with a smaller size is disposed at the region, close to the first non-bending region 113, of the first bending region 111, that is, the size of the first through hole 112 is gradually reduced in a direction in which the symmetry axis b of the first bending region 111 points to the first non-bending region 113, and thus, the bending stress of the entire cover plate can be uniformly dispersed.
Here, the direction a perpendicularly directed from the axis of symmetry b of the first inflection region 111 to the first non-inflection region 113 may refer to a direction directed from the axis of symmetry b to the first non-inflection region 113 in the case of being perpendicular to the axis of symmetry b. The size of the first through hole 112 may refer to an area of an orthographic projection of the first through hole 112 on the second cover sheet layer 13 in a flat state.
Fig. 4 is a schematic structural view of a cover plate 1 according to still another embodiment of the present application.
In one embodiment of the present application, as shown in fig. 4, the second cover sheet layer 13 may include a second bending region 131, the second bending region 131 being disposed opposite to the first bending region 111 of the first cover sheet layer 11, wherein the first bending region 111 includes a discontinuity for dividing the first cover sheet layer 111 into at least two mutually independent portions. For convenience of description, the discontinuity may be referred to as a first discontinuity 114.
Specifically, the first cover sheet layer 11 is divided into at least two portions independent of each other by the first discontinuous region 114. The first discontinuous region 114 and the second bent region 131 are disposed opposite to each other, which means that in a flat state, an orthographic projection of the first discontinuous region 114 on the second cover sheet layer 13 is covered by the second bent region 131, and further, an orthographic projection of the first discontinuous region 114 on the second cover sheet layer 13 may also coincide with the second bent region 131. In this case, when the bending occurs, the spacer area of the first cover plate layer 11 may reduce or avoid the influence of the second bending area 131 of the second cover plate layer 13 on the first cover plate layer 11, thereby further reducing the bending stress of the side of the second cover plate layer 13 away from the first cover plate layer 11. Here, the second bending region 131 may also correspond to the bending region of the display panel 5.
The cover plate 1 according to the embodiment of the present application is described above, and the display device according to the embodiment of the present application is described below with reference to fig. 5.
Fig. 5 is a schematic structural diagram of a display device according to an embodiment of the present application.
As shown in fig. 5, the display device may include the cover 1 and the touch panel 4 according to any of the embodiments, and the touch panel 4 may be disposed on a side of the first cover layer 11 away from the second cover layer 13. It should be understood that the cover plate 1 in fig. 5 may alternatively be as shown in fig. 1 or fig. 2.
Specifically, the cover plate 1 may be disposed at one side of the touch panel 4. When the first cover plate layer 11 of the cover plate 1 is provided with the first discontinuous region 114 or the first through hole 112, if the cover plate is bent toward the first cover plate layer 11, in the bending region of the touch panel 4, the first through hole 112 or the first discontinuous region 114 of the first cover plate layer 11 may reduce the compressive stress of the cover plate 1 on the touch panel 4, or may make the compressive stress of the cover plate 1 on the touch panel 4 be zero, thereby avoiding the influence of the cover plate 1 on the touch panel 4.
In an embodiment of the present application, as shown in fig. 5, the display device may further include a display panel 5, and the display panel 5 may be disposed on a side of the touch panel 4 away from the cover plate 1.
Specifically, the display panel 5 may include an organic light emitting device layer and a thin film encapsulation layer 51, and the thin film encapsulation layer 51 may be disposed between the organic light emitting device layer and the touch panel 4. When the first through hole 112 or the first discontinuous region 114 of the first cover plate layer 11 reduces the compressive stress of the cover plate 1 on the touch panel 4, or makes the compressive stress of the cover plate 1 on the touch panel 4 zero, the compressive stress of the cover plate 1 on the thin film encapsulation layer 51 is also reduced or eliminated, so that the film peeling or the breakage of the thin film encapsulation layer 51 due to the compressive stress is improved.
In one embodiment of the present application, as shown in fig. 5, the display device may further include a polarizing layer 3, and the polarizing layer 3 may be disposed between the first cover sheet layer 11 and the touch panel 4.
Specifically, the polarizing layer 3 and the first cover sheet layer 11 may be adhered by the second adhesive layer 2. When buckling towards first apron layer 11, the setting up of second adhesive linkage 2 has reduced the interact power between first apron layer 11 and the polarisation layer 3 to reduced the crooked deformation volume that first apron layer 11 is close to polarisation layer 3 one side, and then reduced the influence of first apron layer 11 to second apron layer 13.
In the embodiment of the application, the cover plate 1 is provided with the first cover plate layer 11, the first bonding layer 12 and the second cover plate layer 13 which are sequentially stacked, so that when the cover plate is bent towards the first cover plate layer 11, compared with the case that the first cover plate layer 11 and the second cover plate layer 13 are of an integral structure, the bending stress of one side, away from the first cover plate layer 11, of the second cover plate layer 13 is effectively reduced, and the problem that the cover plate 1 of the display device is broken when the cover plate is bent is effectively solved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.
Claims (10)
1. A cover plate, comprising:
the first cover plate layer and the second cover plate layer are arranged in a stacked mode; and
an adhesive layer adhering the first cover sheet layer and the second cover sheet layer.
2. The decking of claim 1, wherein the first decking layer includes a first inflection zone that includes at least one through-hole.
3. The decking of claim 2, wherein the first decking layer further includes at least one first non-bent region, the first bent region including a plurality of the through-holes;
wherein the size of the through hole is gradually reduced in a direction from the symmetry axis of the first bending region to the first non-bending region.
4. The cap plate according to claim 3, wherein a plurality of the through holes are arranged in a matrix in the first bending region.
5. The cap plate according to claim 3, wherein a plurality of the through holes are arranged in a plurality of rows in the first inflection region;
and in two adjacent rows, the through holes are arranged in a staggered manner.
6. The decking of any one of claims 3 to 5, wherein the first decking layer includes two of the first non-bent regions disposed on opposite sides of the first bent region, respectively.
7. The decking of claim 1, wherein the second decking layer includes a second inflection zone disposed opposite the first inflection zone of the first decking layer,
wherein the first bending zone comprises a discontinuity for dividing the first cover sheet layer into at least two mutually independent portions.
8. A display device, comprising:
the cover sheet of any one of claims 1 to 7; and
a touch panel;
the touch panel is arranged on one side, far away from the second cover plate layer, of the first cover plate layer.
9. The display device according to claim 8, further comprising a display panel, wherein the display panel is disposed on a side of the touch panel away from the cover plate.
10. The display device according to claim 8 or 9, further comprising a polarizing layer, wherein the polarizing layer is disposed between the first cover sheet layer and the touch panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910929386.7A CN110648593A (en) | 2019-09-27 | 2019-09-27 | Cover plate and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910929386.7A CN110648593A (en) | 2019-09-27 | 2019-09-27 | Cover plate and display device |
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| CN110648593A true CN110648593A (en) | 2020-01-03 |
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| CN201910929386.7A Pending CN110648593A (en) | 2019-09-27 | 2019-09-27 | Cover plate and display device |
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| CN111128031A (en) * | 2020-01-15 | 2020-05-08 | 昆山工研院新型平板显示技术中心有限公司 | Flexible display cover plate and repairing method thereof, flexible display module and display device |
| CN111429803A (en) * | 2020-03-31 | 2020-07-17 | 上海天马微电子有限公司 | Flexible display panel and display device |
| CN111564109A (en) * | 2020-05-07 | 2020-08-21 | 武汉华星光电半导体显示技术有限公司 | Cover plate glass and display device with same |
| CN112309256A (en) * | 2020-10-30 | 2021-02-02 | 合肥维信诺科技有限公司 | Display device |
| CN112349209A (en) * | 2020-12-01 | 2021-02-09 | 武汉华星光电半导体显示技术有限公司 | Flexible display module and preparation method thereof |
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| CN113554949A (en) * | 2021-07-19 | 2021-10-26 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN114296171A (en) * | 2021-12-27 | 2022-04-08 | 合肥维信诺科技有限公司 | Polarizer and display device |
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