CN210896333U - Flexible cover plate and flexible display screen - Google Patents
Flexible cover plate and flexible display screen Download PDFInfo
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- CN210896333U CN210896333U CN201922231640.4U CN201922231640U CN210896333U CN 210896333 U CN210896333 U CN 210896333U CN 201922231640 U CN201922231640 U CN 201922231640U CN 210896333 U CN210896333 U CN 210896333U
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Abstract
The utility model provides a flexible cover plate and flexible display screen has solved the problem that flexible cover plate easily takes place the rete separation. The flexible cover plate comprises a plurality of material layers which are sequentially stacked, and the flexible cover plate further comprises a groove which penetrates through at least one material layer in the plurality of material layers, wherein the groove is filled with a predetermined material, and the hardness of the predetermined material is smaller than or equal to that of any material layer in the at least one material layer.
Description
Technical Field
The utility model relates to a flexible display technology field, concretely relates to flexible apron and flexible display screen of using this flexible apron.
Background
In recent years, flexible display technology is gradually popularized in the fields of mobile phones and televisions, the yield is greatly improved, and the position of the next generation display technology is not affected. The surface of the flexible display screen is usually provided with a flexible protective film, i.e. a flexible cover plate. In order to meet the requirements of the flexible display screen on hardness and surface flatness, the flexible cover plate usually adopts a multi-film lamination structure. However, with the increase of the hardness of the flexible cover plate, the film layers are easy to peel off in the bending process, and meanwhile, the resilience force is also increased, so that the overall reliability of the flexible display screen is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiments of the present invention are directed to providing a flexible cover plate and a flexible display screen, so as to solve the problem that the flexible cover plate is easy to separate a film layer in the prior art.
The utility model discloses a first aspect provides a flexible apron, including a plurality of material layers that superpose in proper order, its characterized in that, flexible apron still includes the recess that runs through at least one material layer in a plurality of material layers, and the recess is filled by predetermined material, and predetermined material's hardness is less than or equal to the hardness of arbitrary material layer in at least one material layer.
According to the flexible cover plate provided by the embodiment, the groove penetrating through at least one material layer is formed, the material with the hardness smaller than or equal to that of the at least one material layer is used for filling the groove, the material layer in the groove area is replaced by a softer material equivalently, so that the bending property of the flexible cover plate is improved, and the resilience force and the risk of film layer separation in the bending process are reduced.
In one embodiment, the plurality of material layers includes a first base material layer and a first hardened layer stacked in this order, and the groove penetrates the first hardened layer. Because for flexible apron, stress is mainly concentrated in harder sclerosis layer, consequently through setting up the recess in the sclerosis layer, can improve the bending nature of flexible apron by a great extent, reduces the risk that the rete separates.
In one embodiment, the groove further extends through the first substrate layer. Like this, the recess runs through sclerosis layer and substrate layer simultaneously in a year or so, further improves the buckling nature of flexible apron, reduces the risk of rete separation.
In one embodiment, the plurality of material layers further includes a glue layer, a second substrate layer, and a second hardened layer sequentially stacked on the first hardened layer, and the glue layer is made of the same material as the predetermined material.
According to the flexible apron that this embodiment provided, through further setting up second substrate layer and second sclerosis layer on first sclerosis layer, formed two apron structures in other words, further improved the hardness of flexible apron to ensure that flexible apron can not reduce self hardness because of the setting of predetermined material, satisfy the hardness requirement. Meanwhile, the material of the adhesive layer is the same as the preset material, so that on one hand, the self viscosity of the adhesive material can be utilized to increase the bonding force between the preset material and each film layer contacted with the preset material, and the risk of separation between the film layers is reduced; on the other hand, the groove is filled with the material which is the same as the glue layer, namely a wedge embedded into the first hardened layer is formed in the glue layer, so that the bonding force between the film layers is further improved, and the risk of separation between the film layers is reduced.
In one embodiment, the material of the glue layer is a liquid optical glue. Therefore, the filling areas formed by the preset materials in the glue layer and the groove can be synchronously prepared, the preparation process is simplified, and the production efficiency is improved.
In one embodiment, the material of the first substrate layer and the second substrate layer is an organic polymer; and/or the materials of the first hardened layer and the second hardened layer are independently selected from any one of polysiloxane and acrylic.
In one embodiment, the width of the longitudinal section of the groove increases gradually in a direction away from the bend neutral plane. For one bending part, the stress of the neutral bending surface is zero, and the stress is gradually increased from the neutral bending surface to the two sides. Based on this, according to the flexible apron that this embodiment provided, the width through setting up the longitudinal section of recess is along keeping away from the direction of the neutral plane of buckling and gradually increasing for in the direction of keeping away from the neutral plane of buckling, the width of predetermined material gradually increases, ensures that the width of predetermined material is big in the rete that bending stress is big, thereby furthest buffering stress, reduces the risk that the rete separates.
In one embodiment, the shape of the recess is hourglass shaped.
In one embodiment, the flexible cover sheet includes a bending region, and the groove is located in the bending region. Because the bending zone of flexible apron is compared and is changeed in other regions and take place the rete separation, consequently with the recess setting can more pertinent solution rete separation's problem in the bending zone.
The utility model discloses the second aspect provides a flexible display screen, include: a display panel; and the flexible cover plate provided by any one of the above embodiments covers the display surface of the display panel. The flexible display screen has the beneficial effects of the flexible cover plate provided by any one of the above embodiments.
According to the utility model provides a flexible apron and flexible display screen, through setting up the recess that runs through at least one material layer to adopt hardness to be less than or equal to the material on this at least one material layer to fill the recess, be equivalent to with the regional material layer of recess by harder material replacement for softer material, thereby promoted the nature of buckling of flexible apron, reduced the resilience force of the process of buckling and the risk of rete separation.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a flexible display screen according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a flexible cover plate according to a second embodiment of the present invention.
Fig. 3 is a schematic cross-sectional structural view of a flexible cover plate according to a third embodiment of the present invention.
Fig. 4 is a schematic cross-sectional structure diagram of the flexible cover plate shown in fig. 3 applied to the flexible display screen shown in fig. 1 according to a fourth embodiment of the present invention.
Fig. 5a is a schematic cross-sectional structural diagram of a flexible cover plate according to a fifth embodiment of the present invention.
Fig. 5b is an enlarged view of a portion of the flexible cover shown in fig. 5 a.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic cross-sectional structure diagram of a flexible display screen according to a first embodiment of the present invention. As shown in fig. 1, the flexible display screen 100 includes a display panel 20 and a flexible cover 10 covering a display surface of the display panel 20.
The flexible cover 10 is used to improve the overall hardness and scratch resistance of the flexible display screen 100 and protect internal films, such as a touch panel or a polarizer.
The display panel 20 is a flexible display panel, such as a flexible Organic Light-Emitting Diode (OLED) display panel. For an OLED display panel, it specifically includes an anode layer, an organic light emitting layer, and a cathode layer, which are sequentially stacked on a substrate. It should be understood that the display panel 20 may also include a Thin Film Transistor (TFT) array layer between the substrate and the anode layer, thereby forming an Active-matrix organic light emitting diode (AMOLED) display panel. In addition, the flexible display screen 100 may further include other auxiliary structures such as a touch panel, a polarizer, an adhesive layer, and the like between the display panel 20 and the flexible cover 10.
The flexible display screen 100 provided according to the present embodiment may be used in any display device, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital camera, a navigator, and other products or components with a display function.
The structure of the flexible cover 10 will be described in detail with reference to the following embodiments.
Fig. 2 is a schematic structural diagram of a flexible cover plate according to a second embodiment of the present invention. As shown in fig. 2, the flexible cover plate 10 includes a plurality of material layers 11 and a groove 12 penetrating at least one of the material layers 11, which are sequentially stacked, and the groove 12 is filled with a predetermined material having a hardness less than or equal to a hardness of any one of the material layers.
For example, as shown in fig. 2, the plurality of material layers 11 include a first base material layer 111 and a first hardened layer 112 stacked on the display panel 20 in this order, the groove 12 penetrates the first hardened layer 112, the groove 12 is filled with a predetermined material, and the predetermined material has a hardness smaller than that of the first hardened layer 112.
One of the structural differences between the flexible display screen and the general flat display screen lies in that the glass cover plate cannot be used as the general flat display screen, because the glass cover plate has low flexibility and is easy to break in the bending process. Therefore, the flexible cover plate 10 is usually made of a plastic material, i.e., the first substrate layer 111. However, since the flexible display panel requires scratch resistance and impact resistance on the surface, a simple plastic material cannot meet the above requirements, and therefore, a hard scratch-resistant film layer, i.e., the first hardened layer 112, needs to be coated on the plastic material.
Referring to fig. 2, a section in a direction parallel to the opening of the groove 12, i.e., a section of the groove 12 in the x-axis direction, is referred to as a cross section; a section in a direction perpendicular to the opening of the groove 12, i.e., a section of the groove 12 in the y-axis direction, is referred to as a longitudinal section. For grooves 12 having the same longitudinal cross-section at any location, the longitudinal cross-section may reflect the overall shape of the groove 12.
In the present embodiment, the longitudinal section of the groove 12 is the same at any position, and the shape of the longitudinal section of the groove 12 may be any regular or irregular pattern, such as a rectangle, a trapezoid, a parabola, a circle, a pentagon, a hexagon, and the like. The concrete shape of recess 12 can be rationally set up according to actual need, the utility model discloses do not do the injecing to the shape of recess 12.
According to the flexible cover plate provided by the embodiment, the groove 12 penetrating through at least one material layer is arranged, and the material with the hardness smaller than or equal to that of the at least one material layer is adopted to fill the groove 12, which is equivalent to replace the material layer in the area of the groove 12 with a softer material from a harder material, so that the bending property of the flexible cover plate is improved, and the resilience force in the bending process and the risk of film layer separation are reduced.
In one embodiment, as shown in fig. 2, the plurality of material layers 11 further includes a glue layer 113, a second base material layer 114, and a second hardened layer 115 sequentially stacked on the first hardened layer 112, and the glue layer 113 is made of the same material as a predetermined material. Through further setting up second substrate layer 114 and second sclerosis layer 115 on first sclerosis layer 112, equivalent to having formed two apron structures, further improved the hardness of flexible apron 10 to ensure that flexible apron 10 can not reduce self hardness because of the setting of predetermined material, satisfy the hardness requirement. Meanwhile, the material of the adhesive layer 113 is the same as the predetermined material, so that on one hand, the self-viscosity of the adhesive material can be utilized to increase the bonding force between the predetermined material and each film layer contacted with the predetermined material, thereby reducing the risk of separation between the film layers; on the other hand, the groove 12 is filled with the same material as the adhesive layer 113, which is equivalent to forming a wedge embedded in the first hardened layer 112 in the adhesive layer 113, so that the bonding force between the film layers is further improved, and the risk of separation between the film layers is reduced.
In this case, the material of the glue layer 113 may be liquid optical glue. Thus, the glue layer 113 and the filling area formed by the predetermined material in the groove 12 can be synchronously prepared, the preparation process is simplified, and the production efficiency is improved.
In the flexible cover sheet shown in fig. 2, the materials of the first substrate layer 111 and the second substrate layer 114 are the same or different. The materials of the first hardened layer 112 and the second hardened layer 115 are the same or different. The material of the first substrate layer 111 and the second substrate layer 114 is organic matter, and includes any one of polyimide, polymethyl methacrylate, and polyethylene terephthalate, and the first substrate layer 111 and the second substrate layer 114 are each independently selected from any one of the above organic matters. The materials of the first and second hardened layers 112 and 115 are independently selected from any one of polysiloxane and acryl, respectively. The polysiloxane polymer material has good flexibility and bending resistance, and the acrylic polymer material has high hardness.
In one embodiment, the material of the first substrate layer 111 and the second substrate layer 114 is the same, and the material of the first hardened layer 112 and the second hardened layer 115 is the same. Therefore, the preparation difficulty can be reduced, and the production efficiency can be improved.
In the flexible cover sheet shown in fig. 2, the thicknesses of the first substrate layer 111 and the second substrate layer 114 are the same or different. The thicknesses of the first hardened layer 112 and the second hardened layer 115 are the same or different.
In one embodiment, as shown in fig. 2, the flexible cover sheet 10 includes a bending region Q, and the groove 12 is located at the bending region Q. Considering that the bending region Q of the flexible cover plate 10 is more susceptible to film separation than other regions, the groove 12 disposed in the bending region Q can more specifically solve the problem of film separation. In this case, the extending direction of the groove 12 may be set parallel to the bending line of the bending region Q to solve the film separation problem to the maximum extent.
Fig. 3 is a schematic cross-sectional structural view of a flexible cover plate according to a third embodiment of the present invention. As shown in fig. 3, the flexible cover sheet 30 differs from the flexible cover sheet 10 shown in fig. 2 only in that the groove 33 further penetrates the first base material layer 311. This has the advantage that the flexibility of the flexible cover sheet 30 can be further improved.
When the flexible cover 30 shown in fig. 3 is used in the flexible display screen 100 shown in fig. 1, a schematic cross-sectional structure diagram of the flexible cover 30 shown in fig. 3 used in the flexible display screen shown in fig. 1 provided by the fourth embodiment of the present invention as shown in fig. 4 can be obtained. As shown in fig. 4, the flexible cover 30 and the display panel 20 are generally fixed by bonding with a glue layer, for convenience of description, the glue layer between the flexible cover 30 and the display panel 20 is referred to as a first glue layer 40, and the glue layer between the first hardened layer 312 and the second base material layer 314 in the flexible cover 30 is referred to as a second glue layer 313. In this case, the first adhesive layer 40, the predetermined material in the groove 33 and the second adhesive layer 313 are continuously connected to form a whole, so that the bonding force between the film layers is enhanced, and the risk of film layer separation is reduced. When the predetermined material of the first adhesive layer 40, the predetermined material of the groove 33 and the material of the second adhesive layer 313 are the same, for example, both of the liquid optical adhesives, the maximization of the inter-film bonding force can be achieved.
It should be understood that the flexible cover plate 30 provided according to the present embodiment may also include only the first base material layer 311 and the first hardened layer 312, i.e. the flexible cover plate 30 is a single cover plate structure.
Fig. 5a is a schematic cross-sectional structural diagram of a flexible cover plate according to a fifth embodiment of the present invention. Fig. 5b is an enlarged view of a portion of the flexible cover shown in fig. 5 a. As shown in fig. 5a and 5b, the flexible cover 50 differs from the flexible cover 30 shown in fig. 3 only in the shape of the recess. Specifically, in the flexible cover 50, the width of the longitudinal section of the groove 53 gradually increases in a direction away from the bend neutral plane S.
For one bending part, the stress of the bending neutral surface is zero, and the stress is gradually increased from the bending neutral surface S to two sides. Based on this, according to the flexible cover plate 50 provided by the embodiment, the width of the longitudinal section provided with the groove is gradually increased along the direction away from the bending neutral plane, so that the width of the predetermined material is gradually increased in the direction away from the bending neutral plane, and the width of the predetermined material in the film layer with large bending stress is ensured to be large, so that the stress is buffered to the maximum extent, and the risk of film layer separation is reduced.
The neutral plane of bending depends on the application scenario of the flexible cover plate 50. For example, for the flexible cover 50 shown in fig. 5a and 5b, when the flexible cover 50 is used alone, the bend neutral plane S is located in the glue layer 513; when the flexible cover 50 is applied to the flexible display screen, the bend neutral plane S is located in the first hardened layer 512.
In one embodiment, the longitudinal cross-section of the groove 53 is hourglass-shaped. As shown in fig. 5a and 5b, the longitudinal section of the groove 53 has an hourglass shape, and specifically, the longitudinal section of the groove 53 may be divided into a first trapezoid 531 and a second trapezoid 532, an upper bottom (i.e., a bottom side having a short length) of the first trapezoid 531 contacts an upper bottom of the second trapezoid 532, and a contact surface between the upper bottom of the first trapezoid 531 and the upper bottom of the second trapezoid 532 coincides with the bending neutral plane S. Width D of first trapezoid 531n(n is 1, 2, 3 … …) is gradually increased in a direction away from the bend neutral plane S, and the width d of the second trapezoid 532n(n is 1, 2, 3 … …) is gradually increased in a direction away from the bend neutral plane S. In this case, when the flexible cover 50 is used for a flexible display screen, the width of the predetermined material is gradually increased in a direction away from the bending neutral plane S, and the width of the predetermined material in the film layer having a large bending stress is ensured to be large, so that the stress is buffered to the maximum extent, and the risk of film layer separation is reduced.
It should be understood that the shape of the groove 53 given here is merely exemplary, and may be set as appropriate according to the actual situation. In addition, the position of the groove 53 can be set reasonably according to the position of the actual bending neutral plane S.
It should be understood that the terms "first" and "second", "third" and "fourth" used in the description of the embodiments of the present invention are only used for clearly explaining the technical solutions, and are not used for limiting the protection scope of the present invention.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a flexible apron, includes a plurality of material layers that superpose in proper order, its characterized in that, flexible apron is still including running through the recess of at least one material layer in a plurality of material layers, the recess is filled by predetermined material, predetermined material's hardness is less than or equal to the hardness of any material layer in at least one material layer, a plurality of material layers are including the first substrate layer and the first sclerosis layer that superpose in proper order, the recess runs through first sclerosis layer.
2. The flexible cover sheet of claim 1, wherein the groove further extends through the first substrate layer.
3. The flexible cover plate according to claim 1 or 2, wherein the plurality of material layers further comprises a glue layer, a second base material layer and a second hardened layer stacked on the first hardened layer in sequence, and the glue layer is made of the same material as the predetermined material.
4. The flexible cover sheet of claim 3, wherein the material of the glue layer is a liquid optical glue.
5. The flexible cover sheet of claim 3, wherein the material of the first and second substrate layers is an organic polymer; and/or
The materials of the first hardened layer and the second hardened layer are respectively and independently selected from any one of polysiloxane and acrylic.
6. The flexible cover sheet of claim 1, wherein the grooves have a longitudinal cross-section that gradually increases in width in a direction away from the bend neutral plane.
7. The flexible cover sheet of claim 6, wherein the recess is hourglass shaped.
8. The flexible cover sheet of claim 1, wherein the flexible cover sheet includes a flex zone, the groove being located at the flex zone.
9. A flexible display screen, comprising:
a display panel; and
the flexible cover sheet of any of claims 1-8 covering a display surface of the display panel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922231640.4U CN210896333U (en) | 2019-12-12 | 2019-12-12 | Flexible cover plate and flexible display screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922231640.4U CN210896333U (en) | 2019-12-12 | 2019-12-12 | Flexible cover plate and flexible display screen |
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| CN210896333U true CN210896333U (en) | 2020-06-30 |
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| CN201922231640.4U Active CN210896333U (en) | 2019-12-12 | 2019-12-12 | Flexible cover plate and flexible display screen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658515A (en) * | 2021-08-24 | 2021-11-16 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display panel |
| CN114284450A (en) * | 2021-12-16 | 2022-04-05 | 武汉华星光电半导体显示技术有限公司 | Flexible OLED display module, manufacturing method and terminal equipment |
| CN114582239A (en) * | 2022-03-21 | 2022-06-03 | 合肥维信诺科技有限公司 | Flexible cover plate, display device and preparation method of flexible cover plate |
| CN115019651A (en) * | 2022-06-20 | 2022-09-06 | 昆山国显光电有限公司 | Curled display module and production process thereof |
| CN115148103A (en) * | 2022-06-23 | 2022-10-04 | 合肥维信诺科技有限公司 | Cover plate, manufacturing method thereof and display device |
| CN115171533A (en) * | 2022-06-29 | 2022-10-11 | 昆山国显光电有限公司 | Cover plate, foldable display module and display device |
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2019
- 2019-12-12 CN CN201922231640.4U patent/CN210896333U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113658515A (en) * | 2021-08-24 | 2021-11-16 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display panel |
| CN114284450A (en) * | 2021-12-16 | 2022-04-05 | 武汉华星光电半导体显示技术有限公司 | Flexible OLED display module, manufacturing method and terminal equipment |
| CN114582239A (en) * | 2022-03-21 | 2022-06-03 | 合肥维信诺科技有限公司 | Flexible cover plate, display device and preparation method of flexible cover plate |
| CN114582239B (en) * | 2022-03-21 | 2023-12-19 | 合肥维信诺科技有限公司 | Flexible cover plate, display device and preparation method of flexible cover plate |
| CN115019651A (en) * | 2022-06-20 | 2022-09-06 | 昆山国显光电有限公司 | Curled display module and production process thereof |
| CN115019651B (en) * | 2022-06-20 | 2023-05-23 | 昆山国显光电有限公司 | Crimping display module and production process thereof |
| CN115148103A (en) * | 2022-06-23 | 2022-10-04 | 合肥维信诺科技有限公司 | Cover plate, manufacturing method thereof and display device |
| CN115148103B (en) * | 2022-06-23 | 2023-10-24 | 合肥维信诺科技有限公司 | Cover plate, preparation method thereof and display device |
| CN115171533A (en) * | 2022-06-29 | 2022-10-11 | 昆山国显光电有限公司 | Cover plate, foldable display module and display device |
| CN115171533B (en) * | 2022-06-29 | 2024-02-20 | 昆山国显光电有限公司 | Cover plate, foldable display module and display device |
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