CN114241920B - Flexible display panel and display device - Google Patents
Flexible display panel and display device Download PDFInfo
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- CN114241920B CN114241920B CN202111653006.5A CN202111653006A CN114241920B CN 114241920 B CN114241920 B CN 114241920B CN 202111653006 A CN202111653006 A CN 202111653006A CN 114241920 B CN114241920 B CN 114241920B
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- 239000010410 layer Substances 0.000 claims description 76
- 239000012044 organic layer Substances 0.000 claims description 68
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 238000005452 bending Methods 0.000 abstract description 25
- 238000005096 rolling process Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 10
- 239000000758 substrate Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- 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 relates to a flexible display panel and a display device. The thickness of each part of the flexible display panel is proportional to the curvature radius of each part of the flexible display panel, and the curvature radius of each part of the flexible display panel is the curvature radius of each part of the flexible display panel when the flexible display panel is bent/folded. The thickness of the flexible display panel is proportional to the radius of curvature of the flexible display panel at the bending/bending time, and the thickness of the flexible display panel is thinner at the position with smaller radius of curvature. Through the easy plastic deformation that produces of long-time rolling or folding flexible display panel, and this application sets up the position thickness thinner of radius of curvature on the flexible display panel and thinner, when the flexible display panel is to be flat, the position that the greater radius of curvature of plastic deformation was bigger on the flexible display panel is less, because its thickness is thinner so more resumes the horizontality, has consequently reduced the influence that long-time rolling or folding caused the use of flexible display panel.
Description
Technical Field
The present disclosure relates to the field of flexible display technologies, and in particular, to a flexible display panel and a display device.
Background
With the development and popularization of Organic Light-Emitting Diode (OLED) display technology, the application forms of display products are becoming more and more abundant, the traditional planar static display is broken through, the occupation ratio requirements of people on large-size display and small space are becoming stronger, the application of display screens is gradually oriented to the development of adjustable display area (which can be large or small) and the development of occupying the space in two directions, such as the curling televisions and folding screens which are currently on the market, are all generated in response to the requirements of large-size display and small volume. With the continuous progress of flexible technology, the application of flexible organic light emitting display devices will be more and more abundant in the future.
At present, as shown in fig. 1, a conventional flexible organic light emitting display device structure includes a first flexible substrate layer 1, an organic light emitting layer 2, an inorganic film layer 3, an adhesive layer 4, and a second flexible substrate layer 5, which are sequentially stacked, wherein the inorganic film layer 3 plays a role in isolating oxygen and moisture, and an ohmic contact layer (NP) is further provided on the adhesive layer 4. For convenience of storage, the flexible organic light emitting display device is usually in a rolled or folded state when not in use; and the flexible organic light-emitting display device can generate bending deformation due to long-time rolling or folding, and the normal use of the flexible organic light-emitting display device is influenced.
Disclosure of Invention
Accordingly, it is necessary to provide a flexible display panel and a display device for solving the problem that the conventional flexible organic light emitting display device is deformed by bending due to long-time rolling or folding, which affects the normal use of the display device.
To achieve the above object, in one aspect, the embodiments of the present application provide a flexible display panel, where a thickness of each place on the flexible display panel is proportional to a radius of curvature of each place on the flexible display panel, and the radius of curvature of each place on the flexible display panel is the radius of curvature of each place on the flexible display panel when the flexible display panel is bent/folded.
Optionally, the flexible display panel includes a flexible layer and an organic layer, where the flexible layer and the organic layer are stacked;
wherein the thickness of each place on the organic layer is proportional to the radius of curvature of each place on the organic layer, wherein the radius of curvature of each place on the organic layer is the radius of curvature of each place on the organic layer when the flexible display panel is bent/folded.
Optionally, after the flexible display panel is bent/folded, the organic layer is located at an outer side of the flexible layer.
Optionally, the thickness of the organic layer gradually increases from one end of the organic layer to the other end of the organic layer.
Optionally, the thickness of each part on the organic layer gradually increases from the middle part of the organic layer to two ends of the organic layer.
Optionally, the organic layer is a water-blocking organic layer.
Optionally, the organic layer has a lower modulus of elasticity than the flexible layer.
Optionally, the young's modulus of the organic layer is lower than the young's modulus of the flexible layer.
Optionally, the organic layer includes a substrate sub-layer, a circuit sub-layer and a polarizing sub-layer, where the substrate sub-layer, the circuit sub-layer and the polarizing sub-layer are sequentially stacked.
On the other hand, the embodiment of the application also provides a display device, which comprises any one of the flexible display panels.
One of the above technical solutions has the following advantages and beneficial effects:
the application provides a flexible display panel and display device, wherein the thickness of each part of the flexible display panel is in direct proportion to the curvature radius of each part on the flexible display panel during bending/buckling, and then the thickness of the flexible display panel is thicker at the position with larger curvature radius on the flexible display panel when the flexible display panel is bent/buckled in the application, and the thickness of the flexible display panel is thinner at the position with smaller curvature radius on the flexible display panel. The flexible display panel is easy to generate plastic deformation after being rolled or folded for a long time, and particularly, the plastic deformation amount is larger at the position with smaller curvature radius on the flexible display panel; and this application sets up the position thickness that radius of curvature is less on the flexible display panel thinner, and then when the flexible display panel was flattened, the position that the greater radius of curvature of plastic deformation was bigger on the flexible display panel was less, because its thickness is thinner so more resumes the horizontality, consequently reduced the long-time rolling or folding influence that causes the use of flexible display panel.
Drawings
Fig. 1 is a schematic view of a conventional flexible display panel when it is bent.
Fig. 2 is a schematic structural diagram of a flexible display panel according to an embodiment of the present application.
Fig. 3 is a partial enlarged view at a in fig. 2.
Fig. 4 is a schematic structural view of the flexible display panel of fig. 2 when the flexible display panel is bent.
Fig. 5 is a schematic structural diagram of another flexible display panel according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of another flexible display panel according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of another flexible display panel according to an embodiment of the present application.
Fig. 8 is a partial enlarged view at B in fig. 7.
Fig. 9 is a schematic structural diagram of the flexible display panel in fig. 7 when the flexible display panel is bent.
Fig. 10 is a schematic structural diagram of another flexible display panel according to an embodiment of the present application.
Fig. 11 is a schematic structural diagram of another flexible display panel according to an embodiment of the present application.
Fig. 12 is a schematic structural diagram of another flexible display panel according to an embodiment of the present application.
Fig. 13 is a partial enlarged view of fig. 12 at C.
Fig. 14 is a schematic view of the flexible display panel of fig. 12 when bent.
Fig. 15 is a schematic structural diagram of another flexible display panel according to an embodiment of the present application.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "stack", "one end", "the other end", and the like are used herein for illustrative purposes only. Furthermore, the terms first, second and the like in the present application are not used for distinguishing between different elements and not necessarily for describing a sequential or chronological order.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
At present, as shown in fig. 1, a conventional flexible organic light emitting display device structure includes a first flexible substrate layer 1, an organic light emitting layer 2, an inorganic film layer 3, an adhesive layer 4, and a second flexible substrate layer 5, which are sequentially stacked, wherein the inorganic film layer 3 plays a role in isolating oxygen and moisture. For convenience of storage, the flexible organic light emitting display device is usually in a rolled or folded state when not in use; and the flexible organic light-emitting display device can generate bending deformation due to long-time rolling or folding, and the normal use of the flexible organic light-emitting display device is influenced.
In order to solve the above-mentioned problems, the embodiments of the present application provide a flexible display panel 100 and a display device, and the following description will be made with reference to the accompanying drawings. For example, referring to fig. 2, fig. 2 is a schematic structural diagram of a flexible display panel 100 according to an embodiment of the present application. The thickness of the flexible display panel 100 is proportional to the radius of curvature of the flexible display panel 100, wherein the radius of curvature of the flexible display panel 100 is the radius of curvature of the flexible display panel 100 when the flexible display panel 100 is bent/folded.
In this embodiment, the thickness of the flexible display panel 100 is proportional to the radius of curvature of the flexible display panel 100 at the bending/bending time, and when the flexible display panel 100 is bent/bent in this application, the thicker the thickness of the flexible display panel 100 is at the position where the radius of curvature of the flexible display panel 100 is larger, the thinner the thickness of the flexible display panel 100 is at the position where the radius of curvature of the flexible display panel 100 is smaller. The flexible display panel 100 is easily plastically deformed by being rolled or folded for a long time, and particularly, the plastic deformation amount is larger at a position where the radius of curvature is smaller on the flexible display panel 100; the thinner the thickness of the position with smaller curvature radius on the flexible display panel 100 is, the thinner the position with smaller curvature radius on the flexible display panel 100 is, the larger the plastic deformation amount on the flexible display panel 100 is, and the thinner the thickness is, the easier the position is restored to a flat state, thus reducing the influence of long-time rolling or folding on the use of the flexible display panel 100.
As illustrated in fig. 2 and 3, the flexible display panel 100 in the present application includes a first flexible sublayer 121, a light emitting sublayer 122, an inorganic sublayer 123, an adhesive sublayer 124, and a second flexible sublayer 125, wherein the first flexible sublayer 121, the light emitting sublayer 122, the inorganic sublayer 123, the adhesive sublayer 124, and the second flexible sublayer 125 are sequentially stacked. The thickness of the second flexible sublayer 125 is sequentially reduced from left to right in this application, and thus the flexible display panel 100 is formed with the thickness sequentially reduced from left to right. The bending direction of the flexible display panel 100 when the flexible display panel 100 is rolled up is shown by an arrow X in fig. 2; the flexible display panel 100 is bent as shown in fig. 4. After the flexible display panel 100 is rolled up, the thickness of the flexible display panel 100 at each place is proportional to the radius of curvature of the flexible display panel 100 at that place.
As illustrated in fig. 5, the thickness of the first flexible sublayer 121 is sequentially reduced from left to right in this application, thus forming a flexible display panel 100 having a thickness sequentially reduced from left to right. The bending direction of the flexible display panel 100 when the flexible display panel 100 is wound is shown by an arrow X in fig. 5; after the flexible display panel 100 is rolled up, the thickness of the flexible display panel 100 at each place is proportional to the radius of curvature of the flexible display panel 100 at that place.
As illustrated in fig. 6, the thickness of the first flexible sublayer 121 is sequentially reduced from left to right in this application, and the thickness of the second flexible sublayer 125 is also sequentially reduced from left to right, thus forming the flexible display panel 100 having a sequentially reduced thickness from left to right. The bending direction of the flexible display panel 100 when the flexible display panel 100 is wound is shown by an arrow X in fig. 6; after the flexible display panel 100 is rolled up, the thickness of the flexible display panel 100 at each place is proportional to the radius of curvature of the flexible display panel 100 at that place.
As illustrated in fig. 7 and 8, the flexible display panel 100 in the present application includes a first flexible sublayer 121, a light emitting sublayer 122, an inorganic sublayer 123, an adhesive sublayer 124, and a second flexible sublayer 125, wherein the first flexible sublayer 121, the light emitting sublayer 122, the inorganic sublayer 123, the adhesive sublayer 124, and the second flexible sublayer 125 are sequentially stacked. The thickness of the second flexible sublayer 125 is gradually increased from the middle of the second flexible sublayer 125 to both ends of the second flexible sublayer 125 in this application, thus forming the flexible display panel 100 having a thickness gradually increased from the middle to both ends. The bending direction of the flexible display panel 100 when the flexible display panel 100 is bent is shown by an arrow X in fig. 7. After the flexible display panel 100 is bent, as shown in fig. 9, the thickness of the flexible display panel 100 at each place is proportional to the radius of curvature of the flexible display panel 100 at each place after the flexible display panel 100 is bent.
As illustrated in fig. 10, the thickness of the first flexible sublayer 121 gradually increases from the middle of the first flexible sublayer 121 to both ends of the first flexible sublayer 121 in this application, thus forming a flexible display panel 100 having a thickness gradually increasing from the middle to both ends. The bending direction of the flexible display panel 100 when the flexible display panel 100 is bent is shown by an arrow X in fig. 10; after the flexible display panel 100 is bent, the thickness of the flexible display panel 100 at each place is proportional to the radius of curvature of the flexible display panel 100 at each place.
As illustrated in fig. 11, the thickness of the second flexible sub-layer 125 is gradually increased from the middle of the second flexible sub-layer 125 to both ends of the second flexible sub-layer 125 in this application, and the thickness of the first flexible sub-layer 121 is gradually increased from the middle of the first flexible sub-layer 121 to both ends of the first flexible sub-layer 121, thus forming the flexible display panel 100 having a thickness gradually increased from the middle to both ends. The bending direction of the flexible display panel 100 when the flexible display panel 100 is bent is shown by an arrow X in fig. 11; after the flexible display panel 100 is bent, the thickness of the flexible display panel 100 at each place is proportional to the radius of curvature of the flexible display panel 100 at each place.
As illustrated in fig. 12, the flexible display panel 100 described above includes a flexible layer 120 and an organic layer 110 in this application, and the flexible layer 120 is stacked with the organic layer 110. The thickness of the organic layer 110 is proportional to the radius of curvature of the organic layer 110, wherein the radius of curvature of the organic layer 110 is the radius of curvature of the organic layer 110 when the flexible display panel 100 is bent/folded. The thickness of the organic layer 110 is proportional to the radius of curvature of the organic layer 110 when bending/bending, and the thickness of the flexible layer 120 is identical to the radius of curvature of the flexible layer 100 when bending/bending, so that the flexible display panel 100 can be formed.
As illustrated in fig. 14, the organic layer 110 is positioned outside the flexible layer 120 after the flexible display panel 100 is bent/folded, i.e., the organic layer 110 wraps the flexible layer 120 inside.
For example, the organic layer 110 is a water-blocking organic layer 110, the organic layer 110 with a water-blocking function can improve the water resistance of the flexible display panel 100, and a water-blocking layer similar to the inorganic sub-layer 123 can be disposed in the organic layer 110 to realize the water-blocking function of the organic layer 110.
Illustratively, the modulus of elasticity of the organic layer 110 is lower than the modulus of elasticity of the flexible layer 120, wherein the young's modulus of the organic layer 110 is lower than the young's modulus of the flexible layer 120. After the arrangement, the organic layer 110 is softer than the flexible layer 120, so that the organic layer is less prone to plastic deformation.
As illustrated in fig. 12 and 13, the flexible layer 120 includes a first flexible sublayer 121, a light emitting sublayer 122, an inorganic sublayer 123, an adhesive sublayer 124, and a second flexible sublayer 125, wherein the first flexible sublayer 121, the light emitting sublayer 122, the inorganic sublayer 123, the adhesive sublayer 124, and the second flexible sublayer 125 are sequentially stacked. The organic layer 110 includes a base sub-layer 111, a circuit sub-layer 112, and a polarizing sub-layer 113, and the base sub-layer 111, the circuit sub-layer 112, and the polarizing sub-layer 113 are sequentially stacked. In the present application, the thickness of the polarizing sublayer 113 is sequentially reduced from left to right, so the thickness of the organic layer 110 is sequentially reduced from left to right, and thus the flexible display panel 100 is formed with the thickness sequentially reduced from left to right. The bending direction of the flexible display panel 100 when the flexible display panel 100 is wound is shown by an arrow X in fig. 12; after the flexible display panel 100 is rolled up, the thickness of the flexible display panel 100 at each place is proportional to the radius of curvature of the flexible display panel 100 at that place.
As shown in fig. 15, the thickness of the polarizing sublayer 113 is gradually increased from the middle of the polarizing sublayer 113 to both ends of the polarizing sublayer 113 in this application, so that the thickness of the organic layer 110 is gradually increased from the middle of the organic layer 110 to both ends of the organic layer 110, thus forming the flexible display panel 100 having a thickness gradually increased from the middle to both ends. The bending direction of the flexible display panel 100 when the flexible display panel 100 is bent is shown by an arrow X in fig. 15. After the flexible display panel 100 is bent, the thickness of the flexible display panel 100 at each place is proportional to the radius of curvature of the flexible display panel 100 at each place.
The present invention also provides a display device including: the above embodiments provide the flexible display panel 100. It should be noted that the display device provided by the embodiment of the invention may further include other circuits and devices for supporting the display device to work normally, where the display device may be one of a mobile phone, a tablet computer, electronic paper, and an electronic photo frame.
In summary, in the flexible display panel 100 and the display device provided in the present application, the thickness of each portion of the flexible display panel 100 is proportional to the radius of curvature of the portion of the flexible display panel 100 during bending/buckling, so that when the flexible display panel 100 is bent/buckled in the present application, the thickness of the flexible display panel 100 is thicker at the position where the radius of curvature of the flexible display panel 100 is larger, and the thickness of the flexible display panel 100 is thinner at the position where the radius of curvature of the flexible display panel 100 is smaller. The flexible display panel 100 is easily plastically deformed by being rolled or folded for a long time, and particularly, the plastic deformation amount is larger at a position where the radius of curvature is smaller on the flexible display panel 100; the thinner the thickness of the position with smaller curvature radius on the flexible display panel 100 is, the thinner the position with smaller curvature radius on the flexible display panel 100 is, the larger the plastic deformation amount on the flexible display panel 100 is, and the thinner the thickness is, the easier the position is restored to a flat state, thus reducing the influence of long-time rolling or folding on the use of the flexible display panel 100.
In addition, in the flexible display panel 100 and the display device, the flexible display panel 100 may include the flexible layer 120 and the organic layer 110, and the flexible layer 120 and the organic layer 110 are stacked. The thickness of the organic layer 110 is proportional to the radius of curvature of the organic layer 110, wherein the radius of curvature of the organic layer 110 is the radius of curvature of the organic layer 110 when the flexible display panel 100 is bent/folded. The thickness of the organic layer 110 is proportional to the radius of curvature of the organic layer 110 when bending/bending, and the thickness of the flexible layer 120 is identical to the radius of curvature of the flexible layer 100 when bending/bending, so that the flexible display panel 100 can be formed. Meanwhile, the organic layer 110 is also provided as a water blocking organic layer 110, and the water resistance of the flexible display panel 100 can be improved by adopting the organic layer 110 with a water blocking function.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (9)
1. The flexible display panel is characterized in that the thickness of each part of the flexible display panel is in direct proportion to the curvature radius of each part of the flexible display panel, and the curvature radius of each part of the flexible display panel is the curvature radius of each part of the flexible display panel when the flexible display panel is bent or folded;
the flexible display panel comprises a flexible layer and an organic layer, wherein the flexible layer and the organic layer are arranged in a layer-by-layer mode, the flexible layer comprises a first flexible sub-layer, a light-emitting sub-layer, an inorganic sub-layer, an adhesive sub-layer and a second flexible sub-layer, the first flexible sub-layer, the light-emitting sub-layer, the inorganic sub-layer, the adhesive sub-layer and the second flexible sub-layer are sequentially stacked, the thickness of the second flexible sub-layer is gradually increased from the middle part of the second flexible sub-layer to two ends of the second flexible sub-layer, and the flexible display panel with the thickness gradually increased from the middle part to the two ends is formed.
2. The flexible display panel of claim 1, wherein the thickness of the organic layer is proportional to the radius of curvature of the organic layer, wherein the radius of curvature of the organic layer is the radius of curvature of the organic layer when the flexible display panel is bent or flexed.
3. The flexible display panel according to claim 2, wherein the organic layer is located outside the flexible layer after the flexible display panel is bent or folded.
4. A flexible display panel according to claim 3, wherein the thickness of the organic layer increases gradually from the middle of the organic layer to both ends of the organic layer.
5. A flexible display panel according to any one of claims 2 to 4, wherein the organic layer is a water-blocking organic layer.
6. A flexible display panel according to any one of claims 2 to 4, wherein the modulus of elasticity of the organic layer is lower than the modulus of elasticity of the flexible layer.
7. The flexible display panel of claim 6, wherein the young's modulus of the organic layer is lower than the young's modulus of the flexible layer.
8. A flexible display panel according to any one of claims 2 to 4, wherein the organic layer comprises a base sub-layer, a circuit sub-layer and a polarizing sub-layer, the base sub-layer, the circuit sub-layer and the polarizing sub-layer being stacked in that order.
9. A display device comprising the flexible display panel according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111653006.5A CN114241920B (en) | 2021-12-30 | 2021-12-30 | Flexible display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111653006.5A CN114241920B (en) | 2021-12-30 | 2021-12-30 | Flexible display panel and display device |
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| CN114241920A CN114241920A (en) | 2022-03-25 |
| CN114241920B true CN114241920B (en) | 2024-03-22 |
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| Publication number | Publication date |
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| CN114241920A (en) | 2022-03-25 |
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