CN109817095B - Flexible module and display device - Google Patents
Flexible module and display device Download PDFInfo
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- CN109817095B CN109817095B CN201910017626.6A CN201910017626A CN109817095B CN 109817095 B CN109817095 B CN 109817095B CN 201910017626 A CN201910017626 A CN 201910017626A CN 109817095 B CN109817095 B CN 109817095B
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Abstract
The invention discloses a flexible module and display equipment, the flexible module at least comprises a first film layer, a transparent optical adhesive and a second film layer which are sequentially laminated, wherein a coating layer with uneven surface is coated on the surface of one side opposite to the first film layer and/or the second film layer, such an arrangement can increase the area of the first film layer and/or the second film layer in contact with the transparent optical adhesive, and then the adhesive force between the first film layer and/or the second film layer and the transparent optical cement is increased, thereby solving the problems of separation and debonding of the transparent optical cement and the film layers caused by insufficient adhesive force between the transparent optical cement coated between the two film layers and the upper film layer and the lower film layer when the flexible module and the display device are bent statically, the coating layer with the unevenness on the film layer can increase the adhesion force between the film layers while not damaging the structure of the film layer, and ensure the reliability of the flexible module.
Description
Technical Field
The invention relates to the technical field of flexible display, in particular to a flexible module and display equipment.
Background
Along with the development of flexible display technology, the application of flexible module is more and more, flexible module is usually including range upon range of many membranous layers structure, in practical application, flexible module often can be buckled, as shown in fig. 1, carry out the in-process of static buckling to flexible module, each rete ability of buckling is inconsistent and two retes of laminating each other in the flexible module are owing to receive the effect of stress in the flexible module, it is not enough with upper and lower rete adhesive force to easily appear coating transparent optical cement 3 between two retes, lead to transparent optical cement and rete separation, the condition of debonding, lead to the functional failure of corresponding rete.
At present, aiming at the problem that two film layers which are mutually attached in a flexible module are easy to separate by static bending, the adhesiveness of transparent optical adhesive coated between the two film layers is increased, so that the bonding force between the two film layers is increased, and the possibility of debonding of the two film layers is finally reduced. However, if the adhesion of the transparent optical cement coated between the two films is simply increased, the modulus of the transparent optical cement coated between the two films may be increased, which affects the reliability of the dynamic bending of the flexible module.
Disclosure of Invention
Therefore, the invention provides a flexible module and display equipment, wherein the coating layer with the uneven surface is coated on the surface of one side opposite to the first film layer and/or the second film layer, so that the problems that the transparent optical adhesive is separated from the film layers and is debonded due to insufficient adhesive force between the transparent optical adhesive coated between the two film layers and the upper film layer and the lower film layer when a flexible product is statically bent are solved.
According to a first aspect, embodiments of the present invention provide a flexible module including at least a first film layer, a transparent optical adhesive, and a second film layer, which are sequentially stacked, wherein a surface of one side of the first film layer and/or the second film layer opposite to the first film layer is coated with a coating layer having an uneven surface.
Optionally, the material of the coating layer comprises polymethyl methacrylate.
Optionally, the coating layer is a plurality of protrusions arranged at intervals.
Alternatively, the shape of the protrusion may include any one of a pyramid shape, a gear tooth shape, and a hemisphere shape.
Alternatively, the width of the protrusions is 0.2-50 μm and the distance between the centers of adjacent protrusions is 0-50 μm.
Optionally, the height of the protrusion is less than or equal to half of the thickness of the transparent optical glue.
Optionally, the surface of the opposite side of the first film layer and the second film layer is coated with a coating layer with uneven surface, and the protrusions of the coating layer on the first film layer are staggered with the protrusions of the coating layer on the second film layer.
Optionally, the height of the protrusion is less than or equal to the thickness of the transparent optical adhesive.
Optionally, the first film layer is a touch layer, and the second film layer is a polarizer.
According to a second aspect, embodiments of the present invention provide a flexible display device, including the flexible module in any of the above embodiments.
The embodiment of the invention has the following beneficial effects:
1. provides a flexible module and a display device, the flexible module at least comprises a first film layer, a transparent optical adhesive and a second film layer which are sequentially stacked, a coating layer with uneven surface is coated on the surface of one side opposite to the first film layer and/or the second film layer, such an arrangement can increase the area of the first film layer and/or the second film layer in contact with the transparent optical adhesive, and then the adhesive force between the first film layer and/or the second film layer and the transparent optical cement is increased, thereby solving the problems of separation and debonding of the transparent optical cement and the film layers caused by insufficient adhesive force between the transparent optical cement coated between the two film layers and the upper film layer and the lower film layer when the flexible module and the display device are bent statically, the coating layer with the unevenness on the film layer can increase the adhesion force between the film layers while not damaging the structure of the film layer, and ensure the reliability of the flexible module.
2. Through setting up coating layer into the bellied structure of a plurality of spaced, make adjacent protruding structure can not take place the extrusion collision each other when flexible module and display device buckle, thereby when making flexible module and display device crooked, the coating layer does not have extra stress and produces, and first rete and/or second rete on the surface uneven coating layer's surface can reduce the internal stress that first rete and/or second rete produced because of the bending, the whole anti ability of buckling that increases flexible display device.
3. The material of the coating layer and the material of the transparent optical cement are kept consistent, so that the refractive indexes of the coating layer and the transparent optical cement are close, and the optical image of the coating layer is small.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram illustrating the sticking and the peeling of the film layers attached to each other in the flexible module;
FIG. 2 shows a schematic view of a flex module according to an embodiment of the present invention;
FIG. 3 illustrates a schematic view of a flexible membrane layer bending according to an embodiment of the present invention;
FIG. 4 is a schematic view of another flex module according to an embodiment of the present invention;
FIG. 5 is a schematic view of another flex module according to an embodiment of the present invention;
FIG. 6 is a schematic view of another flex module according to an embodiment of the present invention;
wherein the reference numerals are:
1-a first film layer; 2-a second film layer; 3-transparent optical cement; 4-membrane layer separation; 5-coating layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
At present, aiming at the problem that two film layers which are mutually attached in a flexible module are easy to separate in a static bending mode, the prior art generally adopts a method for increasing the adhesion of transparent optical cement coated between the two film layers so as to increase the bonding force between the two film layers, but if the adhesion of the transparent optical cement coated between the two film layers is simply increased, the modulus of the transparent optical cement coated between the two film layers can be improved, and the reliability of the dynamic bending of the flexible module is influenced.
In order to solve the above problems, the inventors of the present invention have found that a method of forming a groove by etching opposite surfaces of upper and lower films bonded by a transparent optical adhesive can increase contact areas between the upper and lower films and the transparent optical adhesive, thereby increasing adhesion between the transparent optical adhesive and the films, and solving a problem that two films bonded to each other in a flexible module are easy to separate due to static bending. However, in subsequent reliability experiments, the inventors found that the reliability of the flexible module processed by the method is reduced, and is mainly reflected in a bending resistance experiment, many modules have film layer fracture, and the phenomenon is not a sporadic phenomenon.
To this end, the embodiment of the present invention provides a flexible module, as shown in fig. 2, which includes at least a first film layer 1, a transparent optical adhesive 3, and a second film layer 2, which are sequentially stacked, and a coating layer 5 having an uneven surface is coated on a surface of one side of the first film layer 1 opposite to the second film layer 2.
In this embodiment, flexible module is including the first rete 1 that stacks gradually, transparent optical cement 3 and second rete 2, the coating layer 5 that coats on the side surface that first rete 1 and second rete 2 are relative, the setting can increase the area of first rete and second rete and transparent optical cement contact like this, and then increase the adhesion between first rete and second rete and the transparent optical cement, thereby solve flexible module and display device because the coating is not enough with upper and lower rete adhesion at the transparent optical cement between two retes when static is buckled, lead to transparent optical cement and rete separation, the problem of debonding, and, coating unevenness coating layer can increase the adhesion between the rete in the structure of not destroying rete itself on the rete, guarantee the reliability of flexible module.
In the present embodiment, the coating layer 5 is a plurality of protrusions arranged at intervals, in an alternative embodiment, the shape of the protrusions includes any one of a pyramid shape, a gear tooth shape and a hemisphere shape, and the present embodiment is described by taking the shape of the protrusions as a pyramid shape. The width of the pyramidal projections is from 0.2 to 50 μm, preferably 25 μm, and the distance between the centers of adjacent pyramidal projections is from 0 to 50 μm, preferably 25 μm.
In the present embodiment, as shown in fig. 3, since the pyramid-shaped protrusions of the coating layer 5 on the first film layer 1 are spaced apart from each other, when the first film layer 1 is bent, the pyramid-shaped protrusions of the coating layer 5 on the first film layer 1 do not collide with each other and are not pressed.
In this embodiment, through setting up coating layer into the bellied structure of a plurality of spaced pyramid forms, make adjacent pyramid form protruding can not take place the extrusion collision each other when flexible module and display device buckle to when making flexible module and display device crooked, the coating layer does not have extra stress and produces, and first rete and second rete on the surface pyramid form protruding structure can reduce the internal stress that first rete and second rete produced because of the bending, wholly increases flexible display device's anti buckling capacity.
In this embodiment, the pyramid-shaped protrusions of the coating layer 5 on the first film layer 1 and the pyramid-shaped protrusions of the coating layer 5 on the second film layer 2 are not staggered with each other, and the height of the pyramid-shaped protrusions of the coating layer 5 on the first film layer 1 and the height of the pyramid-shaped protrusions of the coating layer 5 on the second film layer 2 are less than or equal to half of the thickness of the transparent optical adhesive 3, for example, when the thickness of the transparent optical adhesive is 50 μm, the height of the pyramid-shaped protrusions of the coating layer 5 on the first film layer 1 and the height of the pyramid-shaped protrusions of the coating layer 5 on the second film layer 2 are less than or equal to 25 μm, preferably 25 μm.
In an alternative embodiment, as shown in fig. 4, the pyramid-shaped protrusions of the coating layer 5 on the first film layer 1 and the pyramid-shaped protrusions of the coating layer 5 on the second film layer 2 are staggered with each other, and the height of the pyramid-shaped protrusions of the coating layer 5 on the first film layer 1 and the height of the pyramid-shaped protrusions of the coating layer 5 on the second film layer 2 are less than or equal to the thickness of the transparent optical adhesive 3, for example, when the thickness of the transparent optical adhesive is 50 μm, the height of the pyramid-shaped protrusions of the coating layer 5 on the first film layer 1 and the height of the pyramid-shaped protrusions of the coating layer 5 on the second film layer 2 are less than or equal to 50 μm, preferably.
In this embodiment, the material of the coating layer is polymethyl methacrylate. In practical application, when the first film layer 1 and the second film layer 2 are mutually adhered through the transparent optical cement 3, the transparent optical cement is filled in the gap of the pyramid-shaped protrusions of the coating layer 5 on the surfaces of the first film layer 1 and the second film layer 2, because the transparent optical cement is made of polymethyl methacrylate raw material at present, the inventor selects the material which is the same as the transparent optical cement as the material of the coating layer, so that the refractive indexes of the coating layer and the transparent optical cement are close, and the film layer is directly etched into the concave-convex structure, because the film layer is different from the transparent optical cement material, the difference of the refractive indexes between the film layer and the transparent optical cement is far larger than the difference of the refractive indexes between the coating layer and the transparent optical cement (the coating layer and the transparent optical cement are the same material), so that the optical image of the coating layer is small, compared with the method of directly etching the film layer, is closer to the light output without the concave-convex structure.
In an alternative embodiment, as shown in fig. 5, the flexible module comprises a first film layer 1, a transparent optical adhesive 3 and a second film layer 2, which are sequentially stacked, wherein the surface of the second film layer 2 opposite to the first film layer 1 is coated with a coating layer 5 with uneven surface. The detailed description of the specific implementation mode is provided in the description of the flexible module of the above embodiment.
In this embodiment, flexible module is including the first rete 1 that stacks gradually, transparent optical cement 3 and second rete 2, the relative first rete 1's of second rete side surface on the coating layer 5 of surface unevenness, the setting can increase the area of second rete and transparent optical cement contact like this, and then increase the adhesion between second rete and the transparent optical cement, thereby solve flexible module and display device because the coating is at the transparent optical cement between two retes and upper and lower rete adhesion not enough when static bending, lead to transparent optical cement and rete separation, the problem of debonding, and, coating unevenness's coating layer can increase the adhesion between the rete in the structure of not destroying rete itself on the rete, guarantee the reliability of flexible module.
In an alternative embodiment, as shown in fig. 6, the flexible module comprises a first film layer 1, a transparent optical adhesive 3 and a second film layer 2 which are sequentially laminated, wherein a surface of one side of the first film layer 1 opposite to the second film layer 2 is coated with a coating layer 5 with uneven surface. The detailed description of the specific implementation mode is provided in the description of the flexible module of the above embodiment.
In this embodiment, flexible module is including the first rete 1 that stacks gradually, transparent optical cement 3 and second rete 2, the coating layer 5 that coats on the relative second rete 2 of first rete, the area that can increase first rete and transparent optical cement contact is set up like this, and then increase the adhesion between first rete and the transparent optical cement, thereby solve flexible module and display device because the coating is at the transparent optical cement between two retes and upper and lower rete adhesion not enough when static bending, lead to transparent optical cement and rete separation, the problem of debonding, and, coating unevenness's coating layer can increase the adhesion between the rete in the structure of not destroying rete itself on the rete, guarantee the reliability of flexible module.
In the specific application of the flexible module, the first film layer 1 may be a touch layer, and the second film layer 2 may be a polarizer. The surfaces of the touch layer and the polarizer opposite to each other may be coated with the coating layer having the uneven surface, only the surface of the touch layer opposite to the polarizer may be coated with the coating layer having the uneven surface, or only the surface of the polarizer opposite to the touch layer may be coated with the coating layer having the uneven surface.
The surface of the touch layer and/or the polarizer is coated with the coating layer with the uneven surface, so that the contact area of the touch layer and/or the polarizer and the transparent optical adhesive can be increased, the adhesion force between the touch layer and/or the polarizer and the transparent optical adhesive is increased, the problems of separation and debonding of the touch layer and/or the polarizer and the transparent optical adhesive caused by insufficient adhesion force of the transparent optical adhesive and the touch layer and/or the polarizer when the touch layer and/or the polarizer are statically bent are solved, the uneven surface coated on the touch layer and/or the polarizer can increase the adhesion force between the touch layer and the polarizer without damaging the structures of the touch layer and the polarizer, and the reliability of the flexible module is ensured.
The embodiment of the invention also provides flexible display equipment which comprises the flexible module in any embodiment. The detailed description of the specific implementation mode is provided in the description of the flexible module of the above embodiment.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. The utility model provides a flexible module, at least includes first rete, transparent optical cement and the second rete that stacks gradually, its characterized in that, first rete and/or the coating layer that coats on the relative side surface of second rete has surperficial unevenness in surface, the material of coating layer with the same material of transparent optical cement.
2. The flex module of claim 1, wherein the material of the coating layer comprises: polymethyl methacrylate.
3. The flexible die set of claim 2, wherein the coating layer is a plurality of protrusions disposed at intervals.
4. The flex module of claim 3 wherein the shape of the protrusions comprises: any one of a pyramid shape, a gear tooth shape, and a hemispherical shape.
5. A flexible module according to claim 3, wherein the protrusions have a width of 0.2-50 μm and a distance between adjacent centers of the protrusions is 0-50 μm.
6. A flexible module according to any one of claims 3-5, characterized in that the height of the protrusions is less than or equal to half the thickness of the transparent optical glue.
7. The flexible mold assembly of any one of claims 3-5, wherein the first film layer and the second film layer are coated with a coating layer having a rugged surface on the opposite surfaces, and wherein the protrusions of the coating layer on the first film layer are staggered with the protrusions of the coating layer on the second film layer.
8. The flexible module of claim 7, wherein the height of the protrusions is less than or equal to the thickness of the transparent optical adhesive.
9. The flexible module of any of claims 3-5, wherein the first film is a touch layer and the second film is a polarizer.
10. A flexible display device comprising a flexible module according to any one of claims 1-8.
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| CN201910017626.6A CN109817095B (en) | 2019-01-08 | 2019-01-08 | Flexible module and display device |
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| CN201910017626.6A CN109817095B (en) | 2019-01-08 | 2019-01-08 | Flexible module and display device |
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| CN113366558A (en) * | 2019-07-25 | 2021-09-07 | 深圳市柔宇科技股份有限公司 | Flexible display device and terminal |
| CN111383535B (en) * | 2020-03-25 | 2022-07-08 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN113391721B (en) * | 2021-05-21 | 2023-07-25 | 深圳莱宝高科技股份有限公司 | Flexible touch screen, touch display device and manufacturing method of flexible touch screen |
| CN113888966A (en) * | 2021-08-29 | 2022-01-04 | 苏州浪潮智能科技有限公司 | Display screen, display and server are rolled and folded to computer |
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