CN111091762B - Flexible display panel assembly and flexible display device - Google Patents
Flexible display panel assembly and flexible display device Download PDFInfo
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- CN111091762B CN111091762B CN202010018206.2A CN202010018206A CN111091762B CN 111091762 B CN111091762 B CN 111091762B CN 202010018206 A CN202010018206 A CN 202010018206A CN 111091762 B CN111091762 B CN 111091762B
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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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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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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 rigidity of terminal products 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 capable of switching between an expanded state and a rolled state; the supporting layer is positioned on the surface of the display structure layer, far away from the display side, and is used for supporting the display structure layer, and when the display structure layer is converted between the unfolding state and the curling state, the supporting layer can be driven to be converted 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 science and technology, flexible display panels are getting more and more attention. One existing flexible display panel is capable of switching between an unfolded state and a curled state, wherein the curled state is as shown in fig. 1.
However, since the structural layers in the flexible display panel are all flexible, the flexible display panel is inferior in rigidity. And because the thickness of the flexible display panel is smaller, the hand feeling experience of the user in the process of the user of the flexible display panel is poor, the rigidity test of the current terminal is difficult to pass, and the rigidity standard of the terminal is not met.
Disclosure of Invention
The invention at least partially solves the problems of poor user hand feeling experience and substandard rigidity of terminal products caused by poor rigidity of the traditional 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, comprising:
a display structure layer having a display side, the display structure layer being capable of switching between an expanded state and a rolled state;
the support layer is positioned on the surface of the display structure layer, which is far away from the display side, and is used for supporting the display structure layer, and when the display structure layer is switched between the unfolding state and the curling state, the support layer can be driven to be switched between the unfolding state and the curling state, and the rigidity of the support layer is better than that of the display structure layer.
Further preferably, the supporting layer is hollow, and when the supporting layer is in the curled state, the hollow density of the part with large stress concentration of the supporting layer is greater than the hollow density of the part with small stress concentration of the supporting layer.
It is further preferred that in the expanded state the support layer is rectangular, having opposed first and second sides, and opposed third and fourth sides, the support layer being capable of being curled from the first side towards the second side to cause the support layer to transition from the expanded state to the curled state; the two areas of the supporting layer far away from the first edge and the second edge and respectively close to the third edge and the fourth edge are high-density areas, and the high-density areas are larger than the hollowed-out density of the rest areas of the supporting layer.
It is further preferable that the supporting layer has a plurality of through holes with diamond cross section, so as to form a hollowed-out shape of the supporting layer.
It is further preferable that a plurality of the through holes are filled with an elastic material.
It is further preferred that a first diagonal of the diamond shape is parallel to a first direction and a second diagonal is parallel to the second direction, the length of the first diagonal of each diamond shape is greater than the length of the second diagonal, the first direction being parallel to a direction in which a first side of the support layer points in the second side direction in the expanded state, the second direction being parallel to a direction in which a third side of the support layer points in the fourth side direction in the expanded state.
It is further preferred that the length of the first diagonal of each of the diamond shapes is greater than twice the length of the second diagonal.
It is further preferred that the support layer is a metal material layer.
It is further preferable that the display structure layer includes a flexible substrate, a polarizer, a touch layer, and a display layer 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 curl axis of the curled state of the display structure layer 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 are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
fig. 1 is a schematic view showing a structure of a flexible display panel assembly in a curled state according to an embodiment of the present invention;
FIG. 2 is a top view of a flexible display panel assembly according to an embodiment of the present invention in an expanded state;
FIG. 3 is a side view block diagram of a flexible display panel assembly in an expanded state according to an embodiment of the present invention;
FIG. 4 is a schematic view of a supporting layer structure of a flexible display panel assembly according to an embodiment of the present invention;
FIG. 5 is a schematic diagram showing stress concentration of a supporting layer of a flexible display panel assembly in a curled state according to an embodiment of the present invention;
wherein, the reference numerals are as follows: 1. displaying the structural layer; 2. a support layer; 21. a first edge; 22. a second side; 23. a third side; 24. fourth side; l, a first diagonal; w, second diagonal.
Detailed Description
The present invention will be described in further detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present invention to those skilled in the art.
The invention will be described in more detail below with reference to the accompanying drawings. Like elements are denoted by like reference numerals throughout the various figures. For clarity, the various features of the drawings are not drawn to scale. Furthermore, some well-known portions may not be shown in the drawings.
Numerous specific details of the invention, such as construction, materials, dimensions, processing techniques and technologies, may be set forth in the following description in order to provide a 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 capable of being switched between an expanded 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 is used for supporting the display structure layer 1, and when the display structure layer 1 is switched between the unfolding state and the curling state, the supporting layer 2 can be driven to be switched between the unfolding state and the curling state, and the rigidity of the supporting layer 2 is better than that of the display structure layer 1.
In order to enhance the rigidity of the entire flexible display panel assembly, a support layer 2 having a higher rigidity than the display structure layer 1 is provided 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 away from the display side, the support layer 2 does not affect the display of the display structure layer 1, and can drive the support layer 2 to switch between the expanded state and the curled state when the display structure layer 1 switches between the expanded state and the curled state.
Although the support layer 2 has relatively good rigidity, it is not necessary to say that the support layer 2 cannot be curled at all, and the support layer 2 is a structural layer which has good rigidity relative to the display structural layer 1 and can be 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 feel experience to the flexible display device that this flexible display panel assembly formed still passes present rigidity test, so that this flexible display device accords with the rigidity standard.
Preferably, the supporting layer 2 is hollow, and when the supporting layer 2 is in a curled state, the hollow density of the part with large stress concentration of the supporting layer 2 is larger than the hollow density of the part with small stress concentration of the supporting layer 2.
Wherein the stress concentration is different at different locations of the support layer 2 when the support layer 2 is in a curled state. And when the hollowed-out density of the supporting layer 2 is large, more concentrated stress can be reduced, so that the hollowed-out density of the position with large stress concentration is set to be larger than that of the position with small stress concentration.
This ensures that the stress concentration at all locations of the support layer 2 can be reduced to almost the same when the support layer 2 is in a curled state, thereby ensuring that the support layer 2 has almost no stress concentration when it 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 curled display structure layer 1 does not have wrinkles (i.e., ensures flatness of the entire surface of the display structure layer 1).
Preferably, in the unfolded state, the support layer 2 is rectangular, having opposite first and second sides 21, 22, and opposite third and fourth sides 23, 24, the support layer 2 being capable of being rolled from the first side 21 towards the second side 22, so as to transform the support layer 2 from the unfolded state to the rolled state; two areas of the support layer 2 far away from the first edge 21 and the second edge 22 and respectively close to the third edge 23 and the fourth edge 24 are high-density areas, and the high-density areas are higher than the hollowed-out density of the rest areas of the support layer 2.
Wherein, as shown in fig. 5, the hatched portion is a high density region, that is, the stress distribution of the rectangular support layer 2 in the curled state is obtained by the test of the stress detecting device. That is, the portion a shown in fig. 5 has a greater hollowed-out density than the rest.
If the support layer 2 has another shape and the crimping method is another method, the position of the stress concentration will be changed accordingly.
Preferably, the supporting layer 2 has a plurality of through holes with diamond cross section, so as to form a hollowed-out 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 sections of the through holes are diamond-shaped. When the support layer 2 is in a curled state, the shape of the diamond-shaped through holes may be deformed to some extent to reduce stress concentration of the support layer 2. The greater the number of through holes per unit area in the support layer 2, the greater the hollowed-out density of the support layer 2.
It should be noted that the cross-sectional shape of the through hole is not limited to diamond, but may be any other suitable shape, and will not be described here.
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.
In other words, the flexibility of the support layer 2 can be increased by filling the hollow-out pupil with an elastic material, so that the support layer 2 can adapt to the curled state of the display structure layer 1.
Preferably, the first diagonal L of the diamond is parallel to a first direction, the second diagonal W is parallel to a second direction, the length of the first diagonal L of each diamond is greater than the length of the second diagonal W (L > W), the first direction is parallel to the direction in which the first side 21 of the support layer 2 points in the second side 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 parallel to the direction in which the third side 23 of the support layer 2 points in the fourth side 24 in the unfolded state.
As shown in fig. 4, it is verified that when the through hole of the supporting layer 2 and the curling direction of the supporting layer 2 satisfy the above relationship, the residual stress generated by the curling of the supporting layer 2 can be better eliminated, that is, the stress concentration of the supporting layer 2 due to the curling is reduced, so as to prolong the service life of the supporting layer 2.
Preferably, the length of the first diagonal L of each diamond is greater than twice the length of the second diagonal W (L > 2W).
In addition, the supporting layer 2 may be formed by patterning (pattern) using a mask.
Preferably, the support layer 2 is a layer of metallic material. It should be noted that the support layer 2 may be formed of other suitable materials.
Preferably, the display structure layer 1 includes a flexible substrate (cover window), a polarizer (pol) located at one side of the flexible substrate, a touch layer (touch), and a display layer (panel).
One of the cases of the display structure layer 1 is: the polarizer, the touch layer and the display layer are sequentially arranged from the position close to the flexible substrate to the position far from the flexible substrate. Another case of the display structure layer 1 is: the touch control layer, the polaroid and the display layer are sequentially arranged from the position close to the flexible substrate to the position far 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 adhered by optical adhesive.
In addition, the flexible display panel assembly is formed of polyimide material (PI) or flexible glass in order to achieve curling properties. And the thickness of the flexible substrate may be 25-75um.
Preferably, the thickness of the display structure layer 1 is 50 to 250 micrometers, and the curl 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 in embodiment 1.
Specifically, the display device may be any product or component with a display function, such as an Organic Light Emitting Diode (OLED) display panel, electronic paper, mobile phone, display, navigator, etc.
It should be noted that in this document relational terms such as first and second, and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
Embodiments in accordance with the present invention, as described above, are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. 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 modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. A flexible display panel assembly, comprising:
a display structure layer having a display side, the display structure layer being capable of switching between an expanded state and a rolled state;
the support layer is positioned on the surface of the display structure layer, far away from the display side, and is used for supporting the display structure layer, and when the display structure layer is switched between the unfolding state and the curling state, the support layer can be driven to be switched between the unfolding state and the curling state, and the rigidity of the support layer is better than that of the display structure layer;
the supporting layer is hollow, and when the supporting layer is in the curled state, the hollow density of the part with large stress concentration of the supporting layer is larger than that of the part with small stress concentration of the supporting layer;
wherein in the expanded state the support layer is rectangular, having opposed first and second sides, and opposed third and fourth sides, the support layer being capable of being curled from the first side toward the second side to cause the support layer to transition from the expanded state to the curled state;
two areas of the supporting layer far away from the first edge and the second edge and respectively close to the third edge and the fourth edge are high-density areas, and the high-density areas are higher than the hollowed-out density of the rest areas of the supporting layer;
the supporting layer is provided with a plurality of through holes with diamond cross sections so as to form a hollowed-out shape of the supporting layer;
the number of through holes in the unit area in the high-density area is more than that in the rest areas of the supporting layer;
the first diagonal of the diamond shape is parallel to a first direction, the second diagonal is parallel to a second direction, the length of the first diagonal of each diamond shape is larger than that of the second diagonal, the first direction is parallel to the direction that the first side of the supporting layer points to the second side in the unfolded state, and the second direction is parallel to the direction that the third side of the supporting layer points to the fourth side in the unfolded state.
2. The flexible display panel assembly of claim 1, wherein a plurality of the through holes are each filled with an elastic material.
3. The flexible display panel assembly of claim 1, wherein a length of the first diagonal of each diamond is greater than twice a length of the second diagonal.
4. A flexible display panel assembly according to claim 1, wherein the support layer is a layer of metallic material.
5. 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.
6. A flexible display device comprising the flexible display panel assembly of claims 1 to 5.
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| CN202010018206.2A CN111091762B (en) | 2020-01-08 | 2020-01-08 | Flexible display panel assembly and flexible display device |
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| CN111489651B (en) * | 2020-05-27 | 2022-07-26 | 京东方科技集团股份有限公司 | Scroll display panel and scroll display device |
| KR20220060605A (en) * | 2020-11-04 | 2022-05-12 | 삼성디스플레이 주식회사 | Display device |
| CN115066717B (en) * | 2020-12-28 | 2024-01-19 | 昆山国显光电有限公司 | Flexible display panel and display device |
| CN113012577B (en) * | 2021-03-02 | 2023-10-31 | 京东方科技集团股份有限公司 | Display panel and electronic equipment |
| CN114446179B (en) * | 2022-02-22 | 2023-10-24 | 合肥维信诺科技有限公司 | Flexible display module, preparation method of flexible display module and flexible display device |
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| CN110494909A (en) * | 2019-07-09 | 2019-11-22 | 京东方科技集团股份有限公司 | Display device |
| CN110623796A (en) * | 2019-09-10 | 2019-12-31 | 上海长征医院 | Double stretcher back loading system convenient to narrow environment uses |
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