CN111091762A - Flexible display panel assembly and flexible display device - Google Patents
Flexible display panel assembly and flexible display device Download PDFInfo
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- CN111091762A CN111091762A CN202010018206.2A CN202010018206A CN111091762A CN 111091762 A CN111091762 A CN 111091762A CN 202010018206 A CN202010018206 A CN 202010018206A CN 111091762 A CN111091762 A CN 111091762A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
The invention provides a flexible display panel assembly and a flexible display device, belongs to the technical field of display, and can at least partially solve the problems of poor user hand feeling experience and substandard terminal product rigidity caused by poor rigidity of the conventional flexible display panel. A flexible display panel assembly of the present invention includes: a display structure layer having a display side, the display structure layer being convertible between an expanded state and a rolled state; the supporting layer is positioned on the surface, far away from the display side, of the display structure layer and used for supporting the display structure layer, when the display structure layer is switched between the unfolding state and the curling state, the supporting layer can be driven to be switched between the unfolding state and the curling state, and the rigidity of the supporting layer is better than that of the display structure layer.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a flexible display panel assembly and a flexible display device.
Background
With the development of scientific technology, flexible display panels are receiving more and more attention. One type of flexible display panel is available that is capable of being switched between an unfolded state and a rolled state, wherein the rolled state is shown in fig. 1.
However, since the structural layers in the flexible display panel are all flexible, the flexible display panel has poor rigidity. And because the thickness of the flexible display panel is smaller, the hand feeling experience of the user of the flexible display panel in the process of the user is poorer, the flexible display panel is difficult to pass the rigidity test of the current terminal, and the flexible display panel does not accord with the rigidity standard of the terminal.
Disclosure of Invention
The invention at least partially solves the problems of poor user hand feeling experience and substandard terminal product rigidity caused by poor rigidity of the existing flexible display panel, and provides a flexible display panel assembly with good rigidity.
The technical scheme adopted for solving the technical problem of the invention is a flexible display panel assembly, which comprises:
a display structure layer having a display side, the display structure layer being convertible between an unrolled state and a rolled state;
the supporting layer is positioned on the surface, far away from the display side, of the display structure layer and used for supporting the display structure layer, when the display structure layer is switched between the unfolding state and the curling state, the supporting layer can be driven to be switched between the unfolding state and the curling state, and the rigidity of the supporting layer is higher than that of the display structure layer.
More preferably, the support layer is hollowed, and when the support layer is in the curled state, the hollowed density of the portion of the support layer with a large stress concentration is greater than the hollowed density of the portion of the support layer with a small stress concentration.
It is further preferred that the support layer is rectangular in the deployed state, having opposite first and second sides and opposite third and fourth sides, the support layer being capable of being rolled from the first side to the second side to transition the support layer from the deployed state to the rolled state; two areas of the supporting layer, which are far away from the first edge and the second edge and are respectively close to the third edge and the fourth edge, are high-density areas, and the high-density areas are higher than the hollow-out density of the rest areas of the supporting layer.
It is further preferable that the support layer has a plurality of through holes with a diamond-shaped cross section to form a hollow shape of the support layer.
It is further preferable that each of the plurality of through holes is filled with an elastic material.
It is further preferable that the first diagonal line of each diamond is parallel to a first direction, the second diagonal line is parallel to the second direction, the length of the first diagonal line of each diamond is greater than the length of the second diagonal line, the first direction is parallel to a direction in which the first side of the support layer points to the second side direction in the deployed state, and the second direction is parallel to a direction in which the third side of the support layer points to the fourth side direction in the deployed state.
It is further preferred that the length of the first diagonal of each of the diamonds is greater than twice the length of the second diagonal.
It is further preferred that the support layer is a layer of metallic material.
Preferably, the display structure layer includes a flexible substrate, and a polarizer, a touch layer and a display layer located on one side of the flexible substrate.
It is further preferable that the thickness of the display structure layer is 50 to 250 micrometers, and the curling axis of the display structure layer in a curled state is 5 to 15 mm.
The technical scheme adopted for solving the technical problem of the invention is a flexible display device which comprises the flexible display panel assembly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a structural diagram illustrating a rolled state of a flexible display panel assembly according to an embodiment of the invention;
FIG. 2 is a top view of a flexible display panel assembly in an expanded state according to an embodiment of the present invention;
FIG. 3 is a side view of a flexible display panel assembly in an unfolded state according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a supporting layer structure of a flexible display panel assembly according to an embodiment of the present invention;
fig. 5 is a schematic diagram of stress concentration of a support layer of a flexible display panel assembly in a curled state according to an embodiment of the present invention;
wherein the reference numerals are: 1. displaying the structural layer; 2. a support layer; 21. a first side; 22. a second edge; 23. a third side; 24. a fourth side; l, a first diagonal; w, a second diagonal.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
Example 1:
as shown in fig. 1 to 5, the present embodiment provides a flexible display panel assembly, including:
a display structure layer 1 having a display side, the display structure layer 1 being convertible between an unfolded state and a rolled state;
the supporting layer 2 is located on the surface, far away from the display side, of the display structure layer 1 and used for supporting the display structure layer 1, when the display structure layer 1 is switched between the unfolding state and the rolling state, the supporting layer 2 can be driven to be switched between the unfolding state and the rolling state, and the rigidity of the supporting layer 2 is better than that of the display structure layer 1.
In order to increase the rigidity of the entire flexible display panel assembly, a support layer 2 having rigidity higher than that of the display structure layer 1 is disposed on one side of the display structure layer 1. Since the support layer 2 is fixed on the surface of the display structure layer 1 far away from the display side, the support layer 2 does not affect the display of the display structure layer 1, and the support layer 2 can be driven to switch between the unfolded state and the rolled state when the display structure layer 1 is switched between the unfolded state and the rolled state.
Although the support layer 2 has a relatively high rigidity, the support layer 2 is not curled at all, and the support layer 2 has a relatively high rigidity with respect to the display structure layer 1 and is curled.
In the flexible display panel assembly of this embodiment, through setting up supporting layer 2 in order to improve the whole rigidity of flexible display panel assembly, not only can improve user's feeling experience to the flexible display device that this flexible display panel assembly formed still passes through present rigidity test, so that this flexible display device accords with the rigidity standard.
Preferably, the supporting layer 2 is hollowed, and when the supporting layer 2 is in a curled state, the hollowed density of the portion of the supporting layer 2 where the stress concentration is large is greater than the hollowed density of the portion of the supporting layer 2 where the stress concentration is small.
Wherein the stress concentration at different positions of the support layer 2 is different when the support layer 2 is in a rolled state. And when the hollow density of the supporting layer 2 is large, more concentrated stress can be reduced, so that the hollow density of the position with large stress concentration is set to be larger than the position with small stress concentration.
This ensures that the stress concentration at all positions of the support layer 2 can be reduced to almost the same level when the support layer 2 is in a curled state, thereby ensuring that there is almost no stress concentration when the support layer 2 is bent, so that the stress is uniformly distributed to improve the life of the support layer 2. In addition, the support layer 2 in the flexible display panel assembly of the present embodiment can also ensure that the display structure layer 1 after being rolled has no wrinkles (i.e. ensure that the display structure layer 1 is flat and planar).
Preferably, the support layer 2 has a rectangular shape in the unfolded state, having a first side 21 and a second side 22 opposite to each other, and a third side 23 and a fourth side 24 opposite to each other, and the support layer 2 can be curled from the first side 21 to the second side 22 to transform the support layer 2 from the unfolded state to the curled state; two areas of the supporting layer 2, which are far away from the first edge 21 and the second edge 22 and are close to the third edge 23 and the fourth edge 24 respectively, are high-density areas, and the high-density areas are higher than the hollow density of the rest areas of the supporting layer 2.
As shown in fig. 5, the diagonally shaded portion is a high density region, that is, a stress distribution of the rectangular support layer 2 in a curled state is obtained through a test of a stress detection device. That is, the density of the holes in the portion a shown in fig. 5 is greater than that in the remaining portions.
In addition, if the support layer 2 has another shape and the curling method thereof is another method, the position of stress concentration changes accordingly.
Preferably, the supporting layer 2 has a plurality of through holes with diamond-shaped cross sections to form the hollow shape of the supporting layer 2.
As shown in fig. 4, the hollow-out shape of the support layer 2 is formed by a plurality of through holes, and the cross section of the through holes is diamond-shaped. When the support layer 2 is in a rolled state, the shape of the diamond-shaped through holes may be deformed to reduce the stress concentration of the support layer 2. The larger the number of through holes per unit area in the support layer 2, the larger the cutout density of the support layer 2.
It should be noted that the cross-sectional shape of the through hole is not limited to a diamond shape, and may be other suitable shapes, which are not described in detail herein.
Further, the spacing distance between adjacent through holes is preferably 100 to 500 μm.
Preferably, the plurality of through holes are filled with an elastic material.
The flexibility of the supporting layer 2 can be increased by filling the hollow pupil with an elastic material, so that the supporting layer 2 can adapt to the curling state of the display structure layer 1.
Preferably, the first diagonal lines L of the rhombuses are parallel to a first direction, the second diagonal lines W are parallel to a second direction, the length of the first diagonal lines L of each rhombus is greater than the length of the second diagonal lines W (L > W), the first direction is a direction parallel to the direction in which the first edge 21 of the support layer 2 points to the second edge 22 in the unfolded state (i.e. the x-direction in fig. 4), and the second direction (i.e. the y-direction in fig. 4) is a direction parallel to the direction in which the third edge 23 of the support layer 2 points to the fourth edge 24 in the unfolded state.
As shown in fig. 4, it is verified through practical situations that when the curling direction of the through hole of the support layer 2 and the support layer 2 satisfies the above relationship, the residual stress of the support layer 2 due to curling can be better eliminated, that is, the stress concentration of the support layer 2 due to curling is reduced, so as to prolong the service life of the support layer 2.
Preferably, the length of the first diagonal L of each rhombus is greater than twice the length of the second diagonal W (L > 2W).
In addition, the support layer 2 may be formed by patterning using a reticle (pattern).
Preferably, the support layer 2 is a layer of metallic material. The support layer 2 may be formed of other suitable materials.
Preferably, the display structure layer 1 includes a flexible substrate (cover window), and a polarizer (pol), a touch layer (touch), and a display layer (panel) on one side of the flexible substrate.
One of the cases of the display structure layer 1 is as follows: the polarizer, the touch layer and the display layer are sequentially arranged from the position close to the flexible substrate to the position far away from the flexible substrate. Another case of the display structure layer 1 is: the touch layer, the polaroid and the display layer are sequentially arranged from the position close to the flexible substrate to the position far away from the flexible substrate. In addition, the touch layer may be formed in the display layer, or both the touch layer and the polarizer may be formed in the display layer. The structural layers can be bonded by optical cement.
In addition, in the flexible display panel assembly, in order to achieve the curling performance, the flexible substrate is formed of a polyimide material (PI), or the flexible substrate is a flexible glass. And the thickness of the flexible substrate may be 25-75 um.
Preferably, the thickness of the display structure layer 1 is 50 to 250 micrometers, and the curling axis of the display structure layer 1 in a curled state is 5 to 15 mm.
Example 2:
the present embodiment provides a flexible display device including the flexible display panel assembly of embodiment 1.
Specifically, the display device may be any product or component having a display function, such as an Organic Light Emitting Diode (OLED) display panel, electronic paper, a mobile phone, a display, and a navigator.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A flexible display panel assembly, comprising:
a display structure layer having a display side, the display structure layer being convertible between an unrolled state and a rolled state;
the supporting layer is positioned on the surface, far away from the display side, of the display structure layer and used for supporting the display structure layer, when the display structure layer is switched between the unfolding state and the curling state, the supporting layer can be driven to be switched between the unfolding state and the curling state, and the rigidity of the supporting layer is higher than that of the display structure layer.
2. The flexible display panel assembly of claim 1, wherein the support layer is hollowed, and when the support layer is in the rolled state, the hollowed density of the portion of the support layer with the large stress concentration is greater than the hollowed density of the portion of the support layer with the small stress concentration.
3. The flexible display panel assembly of claim 2, wherein the support layer is rectangular in the unrolled state, having opposing first and second edges and opposing third and fourth edges, the support layer being capable of being rolled from the first edge to the second edge to transition the support layer from the unrolled state to the rolled state;
two areas of the supporting layer, which are far away from the first edge and the second edge and are respectively close to the third edge and the fourth edge, are high-density areas, and the high-density areas are higher than the hollow-out density of the rest areas of the supporting layer.
4. The flexible display panel assembly of claim 2, wherein the support layer has a plurality of through holes with a diamond-shaped cross section to form an openwork shape of the support layer.
5. The flexible display panel assembly of claim 4, wherein a plurality of the through holes are filled with an elastic material.
6. The flexible display panel assembly of claim 4, wherein a first diagonal of the diamond shape is parallel to a first direction, a second diagonal is parallel to a second direction, the first diagonal of each diamond shape has a length greater than the second diagonal, the first direction is parallel to a direction in which the first side of the support layer points in the second side direction in the unfolded state, and the second direction is parallel to a direction in which the third side of the support layer points in the fourth side direction in the unfolded state.
7. The flexible display panel assembly of claim 6, wherein the first diagonal of each diamond shape has a length greater than twice a length of the second diagonal.
8. The flexible display panel assembly of claim 1, wherein the support layer is a layer of metallic material.
9. The flexible display panel assembly of claim 1, wherein the display structure layer comprises a flexible substrate, and a polarizer, a touch layer, and a display layer on one side of the flexible substrate.
10. A flexible display device comprising the flexible display panel assembly of claims 1 to 9.
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| CN113012577A (en) * | 2021-03-02 | 2021-06-22 | 京东方科技集团股份有限公司 | Display panel and electronic equipment |
| US20220141968A1 (en) * | 2020-11-04 | 2022-05-05 | Samsung Display Co., Ltd. | Display device |
| CN114446179A (en) * | 2022-02-22 | 2022-05-06 | 合肥维信诺科技有限公司 | Flexible display module, preparation method of flexible display module and flexible display device |
| CN115066717A (en) * | 2020-12-28 | 2022-09-16 | 昆山国显光电有限公司 | Flexible display panel and display device |
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