CN210156431U - Flexible display device - Google Patents
Flexible display device Download PDFInfo
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- CN210156431U CN210156431U CN201921446315.3U CN201921446315U CN210156431U CN 210156431 U CN210156431 U CN 210156431U CN 201921446315 U CN201921446315 U CN 201921446315U CN 210156431 U CN210156431 U CN 210156431U
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Abstract
The embodiment of the utility model discloses a flexible display device, which comprises a first protective layer, a display layer and a second protective layer which are sequentially stacked; the first stress release layer is positioned between the first protective layer and the display layer, and/or the second stress release layer is positioned between the display layer and the second protective layer; the first stress release layer comprises a first surface close to one side of the first protective layer and a second surface close to one side of the display layer, and at least one of the first surface and the second surface is provided with a microstructure; the second stress release layer comprises a third surface close to one side of the display layer and a fourth surface close to one side of the second protective layer, and at least one of the third surface and the fourth surface is provided with a microstructure. According to the scheme, the stress release layer with the microstructure on the surface is additionally arranged between the display layer and the protective layer of the display layer, and when the display device is bent, the stress between the film layers is released through the microstructure, so that the protective device is achieved, and the service life of the protective device is prolonged.
Description
Technical Field
The embodiment of the utility model provides a relate to and show technical field, especially relate to a flexible display device.
Background
Organic Light-Emitting diodes (OLEDs) are regarded as one of the most promising products in the 21 st century because of their self-luminescence, fast response, Light weight, thin thickness, simple structure, low cost, low voltage requirement, high power saving efficiency, and the like, and flexible OLEDs are also rapidly developed in the trend of artificial intelligence wearing.
The display layer of the flexible OLED display device and the protective layer positioned on the upper side and the lower side of the display layer are bonded by high-viscosity glue, but the viscosity of the bonding glue is high, the stress generated when the OLED display light-emitting device is bent cannot be released, and one side of the display layer or the protective layer in contact with the high-viscosity glue is subjected to stronger compressive stress or tensile stress, so that the surface film layer or the internal structure is damaged, and the service life of the device is shortened.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flexible display device, this display device has longer life.
To achieve the purpose, the utility model adopts the following technical proposal:
a flexible display device comprises a first protective layer, a display layer and a second protective layer which are sequentially stacked, a first stress release layer positioned between the first protective layer and the display layer, and/or a second stress release layer positioned between the display layer and the second protective layer; the first stress release layer comprises a first surface close to one side of the first protective layer and a second surface close to one side of the display layer, and at least one of the first surface and the second surface is provided with a microstructure; the second stress release layer comprises a third surface close to one side of the display layer and a fourth surface close to one side of the second protective layer, and at least one of the third surface and the fourth surface is provided with a microstructure.
Furthermore, microstructures are arranged on the first surface and the second surface; microstructures are disposed on both the third surface and the fourth surface.
Further, the first stress release layer is made of an organic material; the second stress release layer is made of organic material.
Further, the flexible display device further includes a first adhesive layer between the first protective layer and the display layer and a second adhesive layer between the display layer and the second protective layer; the first adhesive layer includes a first adhesive surface adjacent to a side of the first protective layer and a second adhesive surface adjacent to a side of the display layer, at least one of the first adhesive surface and the second adhesive surface being provided with a microstructure; the second adhesive layer comprises a third adhesive surface close to one side of the display layer and a fourth adhesive surface close to one side of the second protective layer, and at least one of the third adhesive surface and the fourth adhesive surface is provided with a microstructure; the first adhesive layer is reused as a first stress release layer; and/or the second adhesive layer is multiplexed into a second stress release layer.
Further, the microstructure includes a plurality of microscopic units arranged in a matrix; the spacing L1 between two adjacent microscopic units satisfies 1< L1<200 μm.
Further, the sectional shape of the microscopic unit includes at least one of a rectangle, a triangle, and a trapezoid.
Further, along the direction perpendicular to the first protection layer, the thickness L2 of the first stress release layer satisfies 0< L2 ≤ 200 μm, and the thickness L3 of the second stress release layer satisfies 0< L3 ≤ 200 μm.
Further, the first protective layer comprises a heat dissipation layer, an antistatic layer and a first external protective layer; the display layer comprises a substrate, an array substrate, an organic light emitting layer and an encapsulation layer which are sequentially stacked; the second protective layer comprises a polarizer layer, a touch layer and a second external protective layer.
The technical scheme of the utility model, stress release layer through increasing that the surface has microstructure between display layer and protective layer to when flexible display device when crooked, through the stress between this microstructure release rete, played protection device, improve its life's beneficial effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic cross-sectional view of the first stress relieving layer of FIG. 1;
fig. 3 is a schematic diagram of stress relief of the flexible display device of fig. 1 under an inflexion;
fig. 4 is a schematic structural diagram of another flexible display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention. Fig. 2 is an enlarged cross-sectional view of the first stress relieving layer 140 of fig. 1. Referring to fig. 1 and 2, the flexible display device includes a first protective layer 110, a display layer 120, and a second protective layer 130, which are sequentially stacked, and a first stress relieving layer 140 between the first protective layer 110 and the display layer 120, and/or a second stress relieving layer 150 between the display layer 120 and the second protective layer 130; the first stress release layer 140 includes a first surface 141 adjacent to a side of the first protective layer 110 and a second surface 142 adjacent to a side of the display layer 120, at least one of the first surface 141 and the second surface 142 being provided with a microstructure; the second stress release layer 150 includes a third surface 151 adjacent to the display layer 120 side and a fourth surface 152 adjacent to the second protective layer 130 side, and at least one of the third surface 151 and the fourth surface 152 is provided with a microstructure.
The upper surface of the display layer 120 may be defined as a light-emitting side, and the lower surface is a non-light-emitting side. The first protective layer 110 and the second protective layer 130 are respectively disposed on the non-light-emitting side and the light-emitting side of the display layer 120, and are used for protecting the display layer 120, and obviously, the design requirement of the second protective layer 130 is satisfied with the requirement of the display device for light emission, and those skilled in the art can set the protective layer according to the product requirement of the display device, and no limitation is made on the internal structural composition of the first protective layer 110, the display layer 120, and the second protective layer 130. The first stress release layer 140 and the second stress release layer 150 refer to structures for releasing stress between films when the flexible display device is bent, and it is understood that an adhesive glue is provided between the first stress release layer 140 and the first protective layer 110 and the display layer 120, and an adhesive glue is provided between the second stress release layer 150 and the display layer 120 and the second protective layer 130. In addition, the second stress release layer 150 and the adhesive on both sides thereof need to satisfy the light emitting requirement, and the related settings are not described in detail in the following contents. For example, the embodiment of the present invention takes the stress release layer disposed between the first protection layer 110 and the display layer 120 and between the second protection layer 130 and the display layer 120 as an example, and introduces the structure of the stress release layer and the principle of stress release, and it should be noted that, according to the condition that the product is affected by stress when bending, a person skilled in the art can only dispose the first stress release layer 140 between the first protection layer 110 and the display layer 120 or only dispose the second stress release layer 150 between the second protection layer 130 and the display layer 120, and the embodiment of the present invention is not limited thereto. For convenience of description, a side of the first stress relieving layer 140 adjacent to the first protective layer 110 is referred to as a first surface 141, a side of the first stress relieving layer 140 adjacent to the display layer 120 is referred to as a second surface 142, a side of the second stress relieving layer 150 adjacent to the display layer 120 is referred to as a third surface 151, and a side of the second stress relieving layer 150 adjacent to the second protective layer 130 is referred to as a fourth surface 152. At least one of the first surface 141 and the second surface 142 has microstructures, and similarly, at least one of the third surface 151 and the fourth surface 152 has microstructures, and fig. 1 exemplarily shows microstructures only on the second surface 142 and the fourth surface 152. Specifically, the flexible display device is designed with a bending direction set in advance according to the actual needs of the product. The display surface of the flexible display device is usually curved only inward and only outward, but may be curved inward and outward at the same time. When bending only to one side, it is sufficient to prepare microstructures on the surface of the stress relieving layer that coincides with the bending direction, for example, when bending the flexible display device to the inner side, it is only necessary to prepare microstructures on the second surface 142 and the fourth surface 152; when bending the flexible display device to the outside, microstructures need only be prepared at the first surface 141 and the third surface 151. It is understood that microstructures may be prepared on both surfaces of the first stress relieving layer 140 and the second stress relieving layer 150 to better relieve stress regardless of the bending direction. It should be noted that when the flexible display device only includes the first stress release layer 140, it is only necessary to prepare a microstructure on at least one of the first surface 141 and the second surface 142, and when the flexible display device only includes the second stress release layer 150, details are not repeated in the following description, and the flexible display device including both the first stress release layer 140 and the second stress release layer 150 is taken as an example for description.
Fig. 3 is a schematic diagram of stress relief of the flexible display device of fig. 1 when subjected to an inflexion. Taking the flexible display device to bend inward as an example, fig. 3 exemplarily shows a state of the first stress relieving layer 140 in a case of bending inward. As can be seen from the figure, when the flexible display device is bent inward, the first surface 141 of the first stress releasing layer 140 is stretched outward, and the film layer on the upper surface of the first protective layer 110 is also stretched outward by the adhesive; the second surface 142 of the first stress releasing layer 140 is pressed inward, and the film layer on the non-light-emitting side of the display layer 120 is also pressed inward by the adhesive glue. A large number of experiments show that the damage of the extrusion force to the film layer is far greater than the damage of the stretching force to the film layer, mainly because the extrusion can cause the fold of the film layer, the destructiveness is larger, and most of the film layers in the flexible display device are made of organic materials and have certain ductility, so that the flexible display device can bear certain stretching. Therefore, in the inward bending, the microstructure can be prepared only on the surface of the first stress releasing layer 140 corresponding to the bending direction, i.e., the second surface 142, and the gap of the microstructure can allow a small displacement between the film layers, thereby achieving the purpose of releasing the stress. It should be noted that the above solution is a basic solution of the embodiment of the present invention, and the microstructure may be prepared only on the second surface 142 or on both the first surface 141 and the second surface 142, so that the film layer can bear a larger tensile stress. The principle of releasing stress by using the surface microstructure of the second stress releasing layer 150 is the same, and is not described herein again.
It should be noted that the microstructure of the surfaces of the first stress relieving layer 140 and the second stress relieving layer 150 can also play a supporting role when the flexible display device is not bent.
The technical scheme of the utility model, stress release layer through increasing that the surface has microstructure between display layer and protective layer to when flexible display device when crooked, through the stress between this microstructure release rete, played protection device, improve its life's beneficial effect.
On the basis of the above embodiment, optionally, microstructures are disposed on both the first surface 141 and the second surface 142; microstructures are disposed on both the third surface 151 and the fourth surface 152. The microstructure is prepared on both surfaces of the first stress release layer 140 and the second stress release layer 150, so that the film layers in the first protective layer 110, the display layer 120 and the second protective layer 130, which are in contact with the adhesive, can bear extrusion stress and larger tensile stress, the film layers are prevented from being damaged, and the service life of the display device is prolonged.
Optionally, the first stress releasing layer 140 is an organic material; the second stress relieving layer 150 is an organic material. The stress release layer is prepared by using an organic material, so that the stress release layer has certain ductility, and the bending performance of the flexible display device is better.
Fig. 4 is a schematic structural diagram of another flexible display device according to an embodiment of the present invention. As shown in fig. 4, optionally, the flexible display device further includes a first adhesive layer 240 between the first protective layer 110 and the display layer 120 and a second adhesive layer 250 between the display layer 120 and the second protective layer 130; the first adhesive layer 240 includes a first adhesive surface 241 near a side of the first protective layer 110 and a second adhesive surface 242 near a side of the display layer 120, at least one of the first adhesive surface 241 and the second adhesive surface 242 being provided with microstructures; the second adhesive layer 250 includes a third adhesive surface 251 adjacent to the display layer 120 side and a fourth adhesive surface 252 adjacent to the second protective layer 130 side, at least one of the third adhesive surface 251 and the fourth adhesive surface 252 being provided with microstructures; the first adhesive layer 240 is multiplexed into the first stress relief layer 140; and/or the second adhesive layer 250 is multiplexed into the second stress relieving layer 150.
Wherein a microstructure is formed on the surface of the first adhesive layer 240 and/or the second adhesive layer 250 so that stress can be released through the first adhesive layer 240 and the second adhesive layer 250, and thus, the first adhesive layer 240 is reused as a first stress release layer; and/or the second adhesion layer 250 is multiplexed as the second stress relief layer first. Further, the first adhesive layer 240 and the second adhesive layer 250 have adhesiveness while releasing stress, and thus, other adhesive layers are not required, thereby reducing the thickness of the flexible display device. The second adhesive layer 250 of the first adhesive layer 240 may be selected to be an adhesive material having a relatively high hardness to ensure that the shape of the microstructure can be maintained, thereby improving the lifespan of the flexible display device. It should be noted that fig. 4 only exemplarily shows that the second bonding surface 242 and the fourth bonding surface 252 have microstructures, and the microstructures may be simultaneously provided on the first bonding surface 241 and the second bonding surface 242, and the third bonding surface 251 and the fourth bonding surface 252, which is not limited by the embodiment of the present invention.
With continued reference to FIG. 2, optionally, the microstructure includes a plurality of microscopic units arranged in a matrix, as shown in the dashed box of FIG. 2; the spacing L1 between two adjacent microscopic units satisfies 1< L1<200 μm. It should be noted that fig. 2 only shows an exemplary spacing between two adjacent micro-cells in a certain cross-section perpendicular to the display surface, and in another cross-section perpendicular to the cross-section, the same applies to the spacing between two adjacent micro-cells. When the distance between the microscopic units is within the range, the bonding between the film layers can be ensured to be good, and simultaneously, the stress during bending can be well released.
Optionally, the cross-sectional shape of the microscopic unit includes at least one of a rectangle, a triangle, and a trapezoid.
Fig. 2 is a schematic diagram illustrating an exemplary cross-sectional shape of the micro unit being a triangle, and the cross-sectional shape of the microstructure may be any one or more of a rectangle, a triangle, and a trapezoid, which is not limited by the embodiment of the present invention. In addition, the pitch L1 between two adjacent microscopic units satisfies 1< L1<200 μm regardless of the shape of the microstructure.
Optionally, along a direction perpendicular to the first passivation layer 110, a thickness L2 of the first stress release layer 140 satisfies 0< L2 ≤ 200 μm, and a thickness L3 of the second stress release layer 150 satisfies 0< L3 ≤ 200 μm. The thickness ranges of the first stress relieving layer 140 and the second stress relieving layer 150 are not limited, and those skilled in the art can design the thicknesses of the first stress relieving layer 140 and the second stress relieving layer 150 according to actual needs.
Optionally, the first protection layer 110 includes a heat dissipation layer, an antistatic layer, and a first external protection layer; the display layer 120 includes a substrate, an array substrate, an organic light emitting layer, and an encapsulation layer, which are sequentially stacked; the second protection layer 130 includes a polarizer layer, a touch layer, and a second external protection layer.
The first external protective layer and the second external protective layer support and protect the flexible display device. It should be noted that, the embodiment of the present invention only exemplifies common structures in the first protection layer 110, the display layer 120 and the second protection layer 130, and those skilled in the art may add other functional film layers according to their own product requirements, which is not limited by the embodiment of the present invention.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (8)
1. A flexible display device is characterized by comprising a first protective layer, a display layer and a second protective layer which are sequentially stacked;
and a first stress release layer between the first protective layer and the display layer, and/or a second stress release layer between the display layer and the second protective layer;
the first stress release layer comprises a first surface close to one side of the first protection layer and a second surface close to one side of the display layer, and at least one of the first surface and the second surface is provided with a microstructure;
the second stress release layer comprises a third surface close to one side of the display layer and a fourth surface close to one side of the second protection layer, and at least one of the third surface and the fourth surface is provided with a microstructure.
2. The flexible display device of claim 1, wherein microstructures are disposed on both the first surface and the second surface;
microstructures are disposed on both the third surface and the fourth surface.
3. The flexible display device of claim 1, wherein the first stress release layer is an organic material;
the second stress release layer is made of an organic material.
4. The flexible display device according to claim 1, further comprising a first adhesive layer between the first protective layer and the display layer and a second adhesive layer between the display layer and the second protective layer;
the first adhesive layer comprises a first adhesive surface close to one side of the first protective layer and a second adhesive surface close to one side of the display layer, and at least one of the first adhesive surface and the second adhesive surface is provided with microstructures;
the second adhesive layer comprises a third adhesive surface close to one side of the display layer and a fourth adhesive surface close to one side of the second protective layer, and at least one of the third adhesive surface and the fourth adhesive surface is provided with a microstructure;
the first adhesive layer is reused as the first stress release layer; and/or the second adhesive layer is multiplexed as the second stress release layer.
5. The flexible display device of claim 1, wherein the microstructure comprises a plurality of microscopic elements arranged in a matrix;
the spacing L1 between two adjacent microscopic units satisfies 1< L1<200 μm.
6. The flexible display device of claim 5, wherein the cross-sectional shape of the microscopic elements comprises at least one of a rectangle, a triangle, and a trapezoid.
7. The flexible display device of claim 1, wherein the first stress relieving layer has a thickness L2 satisfying 0< L2 ≦ 200 μm and the second stress relieving layer has a thickness L3 satisfying 0< L3 ≦ 200 μm in a direction perpendicular to the first protective layer.
8. The flexible display device of claim 1, wherein the first protective layer comprises a heat dissipation layer, an antistatic layer, and a first outer protective layer; the display layer comprises a substrate, an array substrate, an organic light emitting layer and an encapsulation layer which are sequentially stacked; the second protective layer comprises a polarizer layer, a touch layer and a second external protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921446315.3U CN210156431U (en) | 2019-09-02 | 2019-09-02 | Flexible display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921446315.3U CN210156431U (en) | 2019-09-02 | 2019-09-02 | Flexible display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210156431U true CN210156431U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921446315.3U Active CN210156431U (en) | 2019-09-02 | 2019-09-02 | Flexible display device |
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| CN (1) | CN210156431U (en) |
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- 2019-09-02 CN CN201921446315.3U patent/CN210156431U/en active Active
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Address after: 201506 No. nine, No. 1568 engineering road, Shanghai, Jinshan District Patentee after: Shanghai Hehui optoelectronic Co., Ltd Address before: 201506 No. nine, No. 1568 engineering road, Shanghai, Jinshan District Patentee before: EverDisplay Optronics (Shanghai) Ltd. |