CN111653204A - Back plate applied to flexible display panel and flexible display panel - Google Patents
Back plate applied to flexible display panel and flexible display panel Download PDFInfo
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- CN111653204A CN111653204A CN202010632324.2A CN202010632324A CN111653204A CN 111653204 A CN111653204 A CN 111653204A CN 202010632324 A CN202010632324 A CN 202010632324A CN 111653204 A CN111653204 A CN 111653204A
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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 application discloses be applied to flexible display panel's backplate and flexible display panel. The back plate comprises at least two first areas and at least one second area, wherein the first areas and the second areas are arranged side by side, and the second area is positioned between the two first areas; when the backboard is in a bent state, each first area is in a non-bent state, the second area is in a bent state, the second area at least comprises a first stress area and a second stress area, the stress of the first stress area is larger than that of the second stress area, and the first stress area is provided with a first stress reducing structure. By the scheme, the folding service life of the back plate is prolonged. In addition, because the stress of the first stress region and the stress of the second stress region tend to be close to or the same, the problem of stress concentration does not exist, and accordingly, the problem of die stamping caused by the stress concentration does not exist.
Description
Technical Field
The invention relates to the technical field of display, in particular to a back plate applied to a flexible display panel and the flexible display panel.
Background
In a flexible display panel, in order to ensure that the flexible display panel has sufficient resilience in the process from a folded state to a flattened state, a stainless steel (SUS) thin plate is generally used as a back plate to support a display module. However, the stress unevenness at the folding position may cause local stress concentration, leading to a problem that the folding life of the back sheet is not high and a die mark (may also be referred to as a fold or a stress line) is present at the folding position.
Disclosure of Invention
The application expects to provide a be applied to flexible display panel's backplate and flexible display panel for there is the folding life-span of backplate not high among the solution prior art, has the problem of stamp.
In a first aspect, the present invention provides a backplane applied to a flexible display panel, comprising at least two first regions and at least one second region, wherein the first regions and the second regions are arranged side by side, and the second region is located between the two first regions;
when the backboard is in a bent state, each first area is in a non-bent state, the second area is in a bent state, the second area at least comprises a first stress area and a second stress area, the stress of the first stress area is larger than that of the second stress area, and the first stress area is provided with a first stress reducing structure.
As an implementation, the second stress region is provided with a second stress reducing structure having a stress reduction smaller than that of the first stress reducing structure.
As an implementation, the first region has a third stress region at a position close to the second region, the third stress region is provided with a third stress reduction structure, and a stress reduction amount of the third stress reduction structure is smaller than that of the first stress reduction structure.
As an implementation manner, the first stress reduction structure, the second stress reduction structure, and the third stress reduction structure are any one of a thinned structure and a hollowed-out pattern, respectively.
As an implementation manner, the first stress reduction structure, the second stress reduction structure, and the third stress reduction structure are all hollow patterns, and the occupation ratios of the hollow patterns of the second stress reduction structure and the third stress reduction structure in the corresponding regions are all smaller than the occupation ratio of the hollow patterns of the first stress reduction structure in the corresponding regions.
As an implementation mode, the hollow-out patterns are a plurality of through holes which are regularly arranged or randomly arranged.
As an implementation manner, the shapes of the through holes disposed in the first stress region, the second stress region, and the third stress region are the same, and the densities of the through holes disposed in the second stress region and the third stress region are respectively less than the densities of the through holes disposed in the first stress region.
As an implementation manner, the shapes of the through holes arranged in the first stress region, the second stress region and the third stress region are at least partially different, and the densities of the through holes arranged in the second stress region and the third stress region are respectively smaller than the densities of the through holes arranged in the first stress region.
In a second aspect, the present invention provides a flexible display panel, including the above backplane.
As an implementation, the flexible display panel includes a flexible OLED panel.
According to the scheme provided by the invention, the first stress reducing structure is arranged to reduce the stress of the first stress area, so that the stress of the first stress area and the stress of the second stress area tend to be close or the same, and the problem of uneven stress is solved. Along with the fact that the stress of the first stress area and the stress of the second stress area tend to be close to or the same as each other, the fatigue limit of the bending of the back plate can be improved, namely the bending times of the back plate can be improved, and therefore the folding service life of the back plate is prolonged. In addition, because the stress of the first stress region and the stress of the second stress region tend to be close to or the same, the problem of stress concentration does not exist, and accordingly, the problem of die stamping caused by the stress concentration does not exist.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a diagram illustrating a back panel applied to a flexible display panel in a folded and unfolded state according to an embodiment of the present invention;
fig. 2 is a diagram illustrating a back panel applied to a flexible display panel in a folded and unfolded state according to another embodiment of the present invention;
fig. 3 is a diagram illustrating a back panel applied to a flexible display panel in a folded and unfolded state according to another embodiment of the present invention;
fig. 4 is a diagram illustrating a back panel applied to a flexible display panel in a folded and unfolded state according to still another embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, a backplane applied to a flexible display panel according to an embodiment of the present invention includes at least two first areas a and at least one second area B, where the first areas a and the second areas B are arranged side by side, and the second area B is located between the two first areas a; when the backboard is in a bent state, each first area A is in a non-bent state, the second area B is in a bent state, the second area B at least comprises a first stress area 1 and a second stress area 2, the stress of the first stress area 1 is larger than that of the second stress area 2, and the first stress area 1 is provided with a first stress reducing structure.
In this example, two first regions a and one second region B are provided, and other numbers of first regions a and second regions B may be provided according to the use requirement, for example, three first regions a and two second regions B are provided, and the three first regions a and the two second regions B may be alternately provided in sequence along one direction, and the back plate of this structure may be bent at each position of the second region B, that is, has two bending positions.
The material of the back plate is, for example, but not limited to, stainless steel (SUS) to provide a certain resilience when the back plate is transformed from a bent state to a flattened state. The thickness of the back plate can be determined according to actual needs, and the thickness of the back plate can be thickened properly under the condition of large required resilience force.
The fact that the stress of the first stress region 1 is greater than the stress of the second stress region 2 means that the stress of the first stress region 1 is greater than the stress of the second stress region 2 when the backplate is in a bent state before the backplate is provided with the first stress reduction structure. Because of this, the first stress reducing structure is disposed in the first stress region 1, and after the first stress reducing structure is disposed, when the backplane is in a bending state, the stress of the first stress region 1 and the stress of the second stress region 2 may tend to be close to or the same.
The specific form of the first stress reduction structure is not limited in this example as long as the stress of the first stress region 1 can be reduced.
The thickness D may be equal throughout the backplane applied to the flexible display panel in this example. In other examples, the thickness D may be different throughout.
According to the scheme provided by the invention, the first stress reducing structure is arranged to reduce the stress of the first stress area 1, so that the stresses of the first stress area 1 and the second stress area 2 tend to be close to or the same, and the problem of uneven stress is solved. Along with the fact that the stress of the first stress area 1 and the stress of the second stress area 2 tend to be close to or the same as each other, the fatigue limit of the bending of the back plate can be improved, namely the bending times of the back plate can be improved, and therefore the folding service life of the back plate is prolonged. In addition, since the stresses of the first stress region 1 and the second stress region 2 tend to be close to or the same, there is no problem of stress concentration, and accordingly, there is no problem of die stamping due to stress concentration.
As an implementable manner, in order to make the stress throughout the entire second region B more uniform, increasing the flexibility of the second region B when bent, a second stress reduction structure is provided at the second stress region 2, the stress reduction of which is smaller than that of the first stress reduction structure. Since the stress of the second stress region 2 is smaller than that of the first stress region 1 when the second stress region is bent, the stress reduction amount of the corresponding second stress reduction structure is smaller than that of the first stress reduction structure, otherwise, the stress inequality between the first stress region 1 and the second stress region 2 is aggravated.
As an implementation manner, in some cases, there may be a certain stress concentration problem at the junction of the first area a and the second area B, and in order to overcome the stress concentration problem, the first area a is provided with a third stress region 3 at a position close to the second area B, and the third stress region 3 is provided with a third stress reduction structure, and the stress reduction amount of the third stress reduction structure is smaller than that of the first stress reduction structure. After the third stress reducing structure is arranged, when the back plate is in a bent state, the stress at the joint of the first area A and the second area B is relatively uniform, and a die mark cannot be generated due to bending.
As an implementation manner, the first stress reduction structure, the second stress reduction structure, and the third stress reduction structure are any one of a thinned structure and a hollowed-out pattern, respectively.
The thinning structure is used for thinning the thickness of the corresponding position by using a material removing method, such as but not limited to, grinding. For example, but not limiting of, the thickness of the first stress region 1 is less than the thickness of the second stress region 2.
The hollowed-out pattern can be formed by stamping, etching and the like.
In some examples, the first, second, and third stress reducing structures each employ a thinned structure; in some other examples, the first stress reduction structure, the second stress reduction structure, and the third stress reduction structure all employ hollowed-out patterns; in still other examples, one or both of the first, second, and third stress reduction structures employ a thinned structure, with the remainder employing a hollowed-out pattern.
As an implementation manner, the first stress reduction structure, the second stress reduction structure, and the third stress reduction structure are all hollow patterns, and the occupation ratios of the hollow patterns of the second stress reduction structure and the third stress reduction structure in the corresponding regions are all smaller than the occupation ratio of the hollow patterns of the first stress reduction structure in the corresponding regions. The larger the proportion of the hollow pattern in the corresponding area is, the more obvious the effect of the hollow pattern on the stress is, when the backboard is in a bending state, because the stress of the first stress area 1 is the largest, the stress is reduced by adopting the hollow pattern with the largest proportion of the hollow pattern in the corresponding area, and the larger the proportion of the hollow pattern in the corresponding area is, the more material is removed in the area, and the flexibility of the area is correspondingly improved. The occupation ratio of the hollow pattern in the corresponding region is a ratio of an area of the hollow pattern to an area of the region where the hollow pattern is located, for example, a ratio of an area of the hollow pattern of the first stress reduction structure to an area of the first stress region 1, which is the occupation ratio of the hollow pattern in the first stress region 1.
As an implementation mode, the hollow-out patterns are a plurality of through holes which are regularly arranged or randomly arranged.
For example, but not limited to, a mathematical model of stress and hole site distribution of the through holes can be established by the monte carlo method, and the arrangement position of each through hole can be determined in turn. Of course, other random algorithms may be used to determine the placement of the vias.
As an implementation manner, the shapes of the through holes disposed in the first stress region 1, the second stress region 2, and the third stress region 3 are the same, and the densities of the through holes disposed in the second stress region 2 and the third stress region 3 are respectively less than the densities of the through holes disposed in the first stress region 1. The through holes with the same shape can be the same in structure, such as round holes 4, elliptical holes 5, polygonal holes, irregular holes and the like, and can also be the same in structure and size.
As an implementation manner, the shapes of the through holes formed in the first stress region 1, the second stress region 2, and the third stress region 3 are at least partially different, and the densities of the through holes formed in the second stress region 2 and the third stress region 3 are respectively smaller than the densities of the through holes formed in the first stress region 1.
The technical solution of the present application is exemplarily illustrated in three specific examples below.
As shown in fig. 2, the back plate includes two first areas a and one second area B, the first areas a and the second areas B are arranged side by side, and the second area B is located between two adjacent first areas a. The second region B has three first stress regions 1 and two second stress regions 2, and the intersection of the first region a and the second region B is a third stress region 3, in this example two third stress regions 3. The first stress region 1, the second stress region 2 and the third stress region 3 are respectively provided with round holes 4 as hollow patterns, and the sizes of the round holes 4 are the same, certainly, they can also be different. The arrangement density of the round holes 4 in the first stress area 1 is greater than that of the round holes 4 in the second stress area 2 and the third stress area 3.
As shown in fig. 3, the back plate includes two first areas a and one second area B, the first areas a and the second areas B are arranged side by side, and the second area B is located between two adjacent first areas a. The second region B has three first stress regions 1 and two second stress regions 2, and the intersection of the first region a and the second region B is a third stress region 3, in this example two third stress regions 3. First stress zone 1, second stress zone 2, third stress zone 3 have set up elliptical hole 5 as the fretwork pattern respectively to, first stress zone 1 has still set up the round hole 4 that is less than elliptical hole 5, and elliptical hole 5 and round hole 4's size is the same respectively, also can not be the same, and, the total density of 1 round hole 4 in first stress zone and elliptical hole 5 is greater than the density that sets up of second stress zone 2, 3 elliptical holes 5 in third stress zone.
As shown in fig. 4, the back plate includes two first areas a and one second area B, the first areas a and the second areas B are arranged side by side, and the second area B is located between two adjacent first areas a. The second region B has three first stress regions 1 and two second stress regions 2, and the intersection of the first region a and the second region B is a third stress region 3, in this example two third stress regions 3. First stress zone 1, second stress zone 2, third stress zone 3 have set up round hole 4 as the fretwork pattern respectively to, second stress zone 2, third stress zone 3 have still set up the elliptical aperture 5 that is greater than round hole 4, and the size of elliptical aperture 5 and round hole 4 is the same respectively, also can not be the same, and the density that sets up of first stress zone 1 round hole 4 is greater than the total density of second stress zone 2, 3 elliptical apertures 5 of third stress zone and round hole 4.
In the above figures, the left side is the bent state of the back plate, and the right side is the flattened state of the back plate.
In a second aspect, the present invention provides a flexible display panel, including the above backplane.
As an implementation, the flexible display panel includes a flexible OLED panel.
It will be understood that any orientation or positional relationship indicated above with respect to the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., is based on the orientation or positional relationship shown in the drawings and is for convenience in describing and simplifying the invention, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be considered limiting of the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A backboard applied to a flexible display panel is characterized by comprising at least two first areas and at least one second area, wherein the first areas and the second areas are arranged side by side, and the second area is positioned between the two first areas;
when the backboard is in a bent state, each first area is in a non-bent state, the second area is in a bent state, the second area at least comprises a first stress area and a second stress area, the stress of the first stress area is larger than that of the second stress area, and the first stress area is provided with a first stress reducing structure.
2. The backplane according to claim 1, wherein the second stress region is provided with a second stress reducing structure having a stress reduction smaller than a stress reduction of the first stress reducing structure.
3. A backplate according to claim 2 in which the first region has a third stress region adjacent the second region, the third stress region being provided with a third stress reducing structure having a stress reduction which is less than that of the first stress reducing structure.
4. The backplate of claim 3, wherein the first, second, and third stress-reducing structures are any of thinned structures and hollowed-out patterns, respectively.
5. The backplate of claim 4, wherein the first, second, and third stress-reducing structures are all hollow patterns, and the hollow patterns of the second and third stress-reducing structures have a smaller proportion in the corresponding region than the hollow patterns of the first stress-reducing structure.
6. The backboard according to claim 5, wherein the hollowed-out pattern is a plurality of through holes, and the through holes are regularly arranged or randomly arranged.
7. The backplane according to claim 6, wherein the through holes disposed in the first, second and third stress regions have the same shape, and wherein the density of the through holes disposed in the second and third stress regions is respectively less than the density of the through holes disposed in the first stress region.
8. The backplane of claim 6, wherein the shapes of the vias disposed in the first, second, and third stress regions are at least partially different, and wherein the densities of the vias disposed in the second and third stress regions are respectively less than the densities of the vias disposed in the first stress region.
9. A flexible display panel comprising the backplane of any one of claims 1 to 8.
10. The flexible display panel of claim 9, wherein the flexible display panel comprises a flexible OLED panel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010632324.2A CN111653204B (en) | 2020-07-03 | 2020-07-03 | Back plate applied to flexible display panel and flexible display panel |
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| CN202010632324.2A CN111653204B (en) | 2020-07-03 | 2020-07-03 | Back plate applied to flexible display panel and flexible display panel |
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| CN111653204B CN111653204B (en) | 2022-08-09 |
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| CN112927625A (en) * | 2021-03-27 | 2021-06-08 | 武汉华星光电半导体显示技术有限公司 | Supporting plate and folding display device |
| WO2022205552A1 (en) * | 2021-03-27 | 2022-10-06 | 武汉华星光电半导体显示技术有限公司 | Support plate and folding display device |
| US11963318B2 (en) | 2021-03-27 | 2024-04-16 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Supporting plate and foldable display device |
| CN113257123A (en) * | 2021-04-29 | 2021-08-13 | 荣耀终端有限公司 | Display screen module and electronic equipment |
| CN113380145A (en) * | 2021-06-07 | 2021-09-10 | Oppo广东移动通信有限公司 | Support piece, flexible screen assembly and terminal equipment |
| CN113539094A (en) * | 2021-07-14 | 2021-10-22 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| WO2023284041A1 (en) * | 2021-07-14 | 2023-01-19 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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