CN113450644A - Foldable display device - Google Patents
Foldable display device Download PDFInfo
- Publication number
- CN113450644A CN113450644A CN202010212630.0A CN202010212630A CN113450644A CN 113450644 A CN113450644 A CN 113450644A CN 202010212630 A CN202010212630 A CN 202010212630A CN 113450644 A CN113450644 A CN 113450644A
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- China
- Prior art keywords
- functional layer
- display panel
- display device
- protective shell
- bending area
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- 239000002346 layers by function Substances 0.000 claims abstract description 100
- 230000001681 protective effect Effects 0.000 claims abstract description 69
- 238000005452 bending Methods 0.000 claims abstract description 67
- 239000012790 adhesive layer Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 8
- 229910001374 Invar Inorganic materials 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000009825 accumulation Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920005570 flexible polymer Polymers 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Images
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
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
Abstract
The present invention provides a foldable display device, comprising: the display panel is divided into a first non-bending area, a second non-bending area and a bending area, and the bending area is positioned between the first non-bending area and the second non-bending area; the display panel comprises a first functional layer and a second functional layer, wherein the first functional layer is arranged on the backlight side of a first non-bending area of the display panel through a first adhesive layer, the second functional layer is arranged on the backlight side of a second non-bending area of the display panel through a second adhesive layer, and the distance between the first functional layer and the second functional layer is larger than zero; the first protective shell covers a first surface of the first functional layer, which is far away from the display panel, and is fixedly connected to a second surface of the first functional layer, which is intersected with the first surface; and the second protective shell covers a third surface of the second functional layer, which deviates from the display panel. The invention can improve the bending resistance of the foldable display device.
Description
Technical Field
The invention relates to the field of display panels, in particular to a foldable display device.
Background
Since the concept has been widely spread, foldable mobile terminals have been spotlighted by terminal manufacturers. As a main body of the foldable display, a flexible OLED (organic light-emitting diode) display module is also a new market that receives great attention and great investment from various related technical manufacturers. The materials in the foldable display module have the characteristic of flexibility, and are currently concentrated into various types of flexible polymer materials from the aspect of material selection. Due to the material characteristics of the polymer, the polymer is easy to soften and permanently deform under the action of long-time stress, especially in a high-temperature environment, so that the folding display module cannot recover to be flat after being bent, irreversible deformation is generated, and even the functional fracture failure of the display panel is finally caused. In other words, the folding region of the foldable display device is prone to cause a crease that is difficult to recover after repeated folding and unfolding operations and after long-term folding.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
The present invention is directed to solve the above problems of the prior art, and an object of the present invention is to provide a foldable display device to improve bending resistance of the foldable display device.
In order to solve the above technical problems, the present invention provides a foldable display device, comprising:
the display panel is divided into a first non-bending area, a second non-bending area and a bending area, and the bending area is positioned between the first non-bending area and the second non-bending area;
the display panel comprises a first functional layer and a second functional layer, wherein the first functional layer is arranged on the backlight side of a first non-bending area of the display panel through a first adhesive layer, the second functional layer is arranged on the backlight side of a second non-bending area of the display panel through a second adhesive layer, and the distance between the first functional layer and the second functional layer is larger than zero;
the first protective shell covers a first surface of the first functional layer, which is far away from the display panel, and is fixedly connected to a second surface of the first functional layer, which is intersected with the first surface;
the second protective shell covers a third surface, which is far away from the display panel, of the second functional layer, and is fixedly connected to a fourth surface, which is intersected with the third surface, of the second functional layer; and
at least one connecting piece, which is positioned at the backlight side of the display panel bending area; the first protective shell and the second protective shell are rotatably connected through the at least one connecting piece along an axis parallel to the bending area.
In an embodiment of the invention, the second surface is parallel to the fourth surface, and a distance from the second surface to the fourth surface is greater than a width of the bending region.
In an embodiment of the present invention, the second face and the fourth face are both parallel to the axis.
In an embodiment of the invention, the distance from the second surface to the axis is equal to the distance from the axis to the fourth surface.
In one embodiment of the present invention, the material of the functional layer is invar.
In one embodiment of the present invention, the thickness of the functional layer is 1um to 1000 um.
In one embodiment of the present invention, the protective shell has a thickness of 0.1mm to 20 mm.
In one embodiment of the invention, the connecting member is a hinge or a spring.
In an embodiment of the invention, the foldable display device further includes a third functional layer, and the third functional layer is disposed on the light emitting side of the display panel and fixedly connected to the first protective shell and the second protective shell.
In one embodiment of the invention, the functional layer is integrally formed with the protective shell or is detachably connected thereto.
According to the invention, the distance between the first functional layer and the second functional layer is larger than zero, so that the stress applied to the display panel during bending cannot be increased due to the arrangement of the functional layers. On this basis, because the first protective shell and the second protective shell are rotatably connected through the connecting piece, the problem of stress expansion and contraction does not exist between the first protective shell and the second protective shell, and the first protective shell and the second protective shell are respectively connected with at least one side of the first functional layer and the second functional layer, so that the relative position between the first functional layer and the second functional layer can be relatively stable, the stress accumulation action on the display panel can be obviously reduced, the bending area of the display panel can be flattened, and the flatness of the display device can be kept for a long time.
In summary, the present invention can improve the bending resistance of the foldable display device.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention, and further features, objects, and advantages of the invention will become apparent from a reading of the following detailed description of non-limiting embodiments with reference to the drawings. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a foldable display device according to an embodiment of the present invention.
Fig. 2 is a reference view of a first state of a foldable display device in another embodiment of the present invention.
Fig. 3 is a reference view of the foldable display device shown in fig. 2 in a second state.
Fig. 4 is a schematic connection diagram of the first protective shell and the second protective shell according to an embodiment of the invention. And fig. 5 to 9 are schematic connection diagrams of the functional layer and the protective shell in the embodiment of the present invention.
Reference numerals
1 display panel
21 first functional layer
22 second functional layer
221 first connection part
31 first adhesive layer
32 second adhesive layer
41 first protective housing
410 first base plate
411 clamping groove
412 briquetting
413 screw
414 glue material
415 first side plate
42 second protective shell
420 second base plate
425 second side plate
43 connecting piece
5 third functional layer
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
Fig. 1 is a schematic structural diagram of a foldable display device according to an embodiment of the present invention. Fig. 4 is a schematic connection diagram of the first protective shell and the second protective shell according to an embodiment of the invention. As shown in fig. 1 and 4, the foldable display device provided in this embodiment includes: the display device comprises a display panel 1, a first functional layer 21, a second functional layer 22, a first protective shell 41, a second protective shell 42 and at least one connecting piece 43. The display panel 1 is divided into a first non-bending region, a second non-bending region and a bending region, and the bending region is located between the first non-bending region and the second non-bending region. The first functional layer 21 is disposed on the backlight side of the first non-bending region of the display panel 1 through a first adhesive layer 31, the second functional layer 22 is disposed on the backlight side of the second non-bending region of the display panel 1 through a second adhesive layer 32, and the distance between the first functional layer 21 and the second functional layer 22 is greater than zero. The first protective cover 41 covers a first surface of the first functional layer 21 facing away from the display panel 1, and is fixedly connected to a second surface of the first functional layer 21 intersecting with the first surface. The second protective shell 42 covers a third surface of the second functional layer 22 facing away from the display panel 1, and is fixedly connected to a fourth surface of the second functional layer 22 intersecting with the third surface. The at least one connecting element 43 is located on the backlight side of the bending region of the display panel 1. The first protective shell 41 and the second protective shell 42 are rotatably connected by the at least one connecting piece 43 along an axis parallel to the bending region.
According to the present invention, since the distance between the first functional layer 21 and the second functional layer 22 is greater than zero, the functional layers are not disposed to increase the stress applied to the display panel 1 during bending. On this basis, since the first protective shell 41 and the second protective shell 42 are rotatably connected by the connecting piece 43, there is no problem of stress expansion and contraction between the two, so that the relative position between the first functional layer 21 and the second functional layer 22 can be ensured to be relatively stable by connecting at least one side of the first functional layer 21 and the second functional layer 22 with the first protective shell 41 and the second protective shell 42 respectively, which obviously helps to reduce stress accumulation acting on the display panel 1, helps to flatten the bending area of the display panel 1, and maintains the flatness of the display device for a long time.
As shown in fig. 1, the second surface is parallel to the fourth surface, and the distance from the second surface to the fourth surface is greater than the width of the bending region. In other words, the second surface and the fourth surface are two opposite surfaces of the first functional layer 21 and the second functional layer 22, and the two opposite surfaces both correspond to the non-bending region of the display panel 1. Therefore, the stress of the display panel 1 in a flat state can be ensured to be uniform, and the stress of the display device in bending can be reduced. Optionally, the second face and the fourth face are both parallel to the axis, in this case, the second face is located at an end of the first functional layer 21 away from the bending region, and the fourth face is located at an end of the second functional layer 22 away from the bending region, so that it can be further ensured that the stress applied to the display panel 1 in the tiled state is uniform, and the stress applied to the display device in bending is reduced. Further, the distance from the second face to the axis is equal to the distance from the axis to the fourth face. At this time, the first non-bending region and the second non-bending region are symmetrical along the bending region, and the size of the first functional layer 21 is equal to that of the second functional layer 22, so that the uniform stress of the display panel 1 in a tiled state can be ensured, the stress of the display panel 1 in bending is reduced, and the bending resistance of the foldable display device is improved. Of course, the first protective shell 41 may be connected to the other side of the first functional layer 21, and the second protective shell 42 may be connected to the other side of the second functional layer 22, which is not limited in the present invention.
Alternatively, the material of the functional layer may be invar. Further, the functional layer may have a thickness of 1um to 1000 um. In a preferred embodiment of the present invention, the protective shell has a thickness of 0.1mm to 20 mm. Further, the connecting member 43 may be a hinge or a spring, etc. Therefore, the stress of the display panel 1 in a flat state can be ensured to be uniform, the stress of the display panel 1 in bending is reduced, and the bending resistance of the foldable display device is improved.
Fig. 2 is a reference view of a first state of a foldable display device in another embodiment of the present invention. Fig. 3 is a reference view of the foldable display device shown in fig. 2 in a second state. As shown in fig. 2 and 3, in another embodiment of the present invention, the foldable display device further includes a third functional layer 5, and the third functional layer 5 is disposed on the light emitting side of the display panel 1 and fixedly connected to the first protective shell 41 and the second protective shell 42. Therefore, the stress of the display panel 1 in a flat state can be further ensured to be uniform, the stress of the display panel 1 in bending is reduced, the bending resistance of the foldable display device is improved, and the connection stability between the protective shell and the display panel 1 can be enhanced.
Fig. 4 is a schematic connection diagram of the first protective shell and the second protective shell according to an embodiment of the invention. As shown in fig. 4, the first protective case 41 is connected to the second protective case 42 by a connecting member 43. Specifically, the first protective case includes a first bottom plate 410 and a first side plate 415, the first bottom plate 410 covers the first face of the first functional layer 21, and the first side plate is fixedly connected to the second face of the first functional layer. The second protective shell includes a second bottom panel 420 and a second side panel 425, the second bottom panel 420 covering the third surface of the second functional layer 22, the second side panel being fixedly connected to the fourth surface of the second functional layer. Therefore, the bending area of the display panel is flattened, and the flatness of the display device is maintained.
Further, the functional layer is integrally formed with the protective shell or detachably connected thereto. Specifically, fig. 5 to 9 are schematic connection diagrams of the functional layer and the protective shell in the embodiment of the present invention. As shown in fig. 5, the first side plate 415 of the first protective shell 41 may be provided with a plurality of card slots 411, the first functional layer 21 is provided with a plurality of first connecting portions 221 matching with the card slots 411, and each first connecting portion 221 is respectively embedded in one card slot 411, so that the first functional layer 21 and the protective shell are detachably connected. As shown in fig. 6, the first side plate 415 of the first protective shell 41 directly contacts the first connecting portion 221 of the first functional layer 21, a pressing piece 412 is disposed on a side of the first connecting portion 221 away from the first protective shell 41, and the first functional layer 21 and the protective shell are detachably connected through the pressing piece 412. As shown in fig. 7, the first connection portion 221 of the first functional layer 21 and the first side plate 415 of the first protective case 41 may be directly connected by a screw 413. As shown in fig. 8, the first connection portion 221 of the first functional layer 21 may be connected to the first side plate 415 of the first protective case 41 by a glue material 414. As shown in fig. 9, the first functional layer 21 may be integrally formed with the first side plate 415 of the first protective case 41. Likewise, the second functional layer 22 and the third functional layer 5 can of course also be connected to the protective shell in any of the ways described above. The connection mode can ensure the stability of connection between the protective shell and the display panel 1, so that the stress of the display panel 1 in a flat state is uniform, the stress of the display panel 1 in bending is reduced, and the bending resistance of the foldable display device is improved.
Since the distance between the first functional layer 21 and the second functional layer 22 is greater than zero, the functional layers are not disposed to increase the stress applied to the display panel 1 during bending. On this basis, since the first protective shell 41 and the second protective shell 42 are rotatably connected by the connecting piece 43, there is no problem of stress expansion and contraction between the two, so that the relative position between the first functional layer 21 and the second functional layer 22 can be ensured to be relatively stable by connecting at least one side of the first functional layer 21 and the second functional layer 22 with the first protective shell 41 and the second protective shell 42 respectively, which obviously helps to reduce stress accumulation acting on the display panel 1, helps to flatten the bending area of the display panel 1, and maintains the flatness of the display device for a long time.
In summary, the present invention can improve the bending resistance of the foldable display device.
It should be noted that the foldable display device provided in this embodiment may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a media player, a watch device, a pendant device, an earphone or a headphone device, a navigation device, a wearable or miniature device, an embedded device of a system in which an electronic device having a display is installed in a self-service terminal or an automobile, and the like.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. At least one unit or means recited in the apparatus claims may also be implemented by one unit or means in software or hardware. It is to be understood that the terms "lower" or "upper", "downward" or "upward" and the like are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures; the terms first, second, etc. are used to denote names, but not any particular order.
Claims (10)
1. A foldable display device, comprising:
the display panel is divided into a first non-bending area, a second non-bending area and a bending area, and the bending area is positioned between the first non-bending area and the second non-bending area;
the display panel comprises a first functional layer and a second functional layer, wherein the first functional layer is arranged on the backlight side of a first non-bending area of the display panel through a first adhesive layer, the second functional layer is arranged on the backlight side of a second non-bending area of the display panel through a second adhesive layer, and the distance between the first functional layer and the second functional layer is larger than zero;
the first protective shell covers a first surface of the first functional layer, which is far away from the display panel, and is fixedly connected to a second surface of the first functional layer, which is intersected with the first surface;
the second protective shell covers a third surface, which is far away from the display panel, of the second functional layer, and is fixedly connected to a fourth surface, which is intersected with the third surface, of the second functional layer; and
at least one connecting piece, which is positioned at the backlight side of the display panel bending area; the first protective shell and the second protective shell are rotatably connected through the at least one connecting piece along an axis parallel to the bending area.
2. The foldable display device of claim 1, wherein the second face is parallel to the fourth face, and a distance from the second face to the fourth face is greater than a width of the inflection zone.
3. The foldable display device of claim 2, wherein the second face and the fourth face are both parallel to the axis.
4. The foldable display device of claim 3, wherein the distance from the second face to the axis is equal to the distance from the axis to the fourth face.
5. The foldable display device of claim 1, wherein the material of the functional layer is invar.
6. The foldable display device of claim 5, wherein the functional layer has a thickness of 1um to 1000 um.
7. The foldable display device of claim 1, wherein the protective shell has a thickness of 0.1mm to 20 mm.
8. The foldable display device of claim 1, wherein the connector is a hinge or a spring.
9. The foldable display device of claim 1, further comprising a third functional layer disposed on the light exit side of the display panel and fixedly connected to the first protective case and the second protective case.
10. The foldable display device of any one of claims 1 to 9, wherein the functional layer is integrally formed with or detachably connected to the protective shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010212630.0A CN113450644A (en) | 2020-03-24 | 2020-03-24 | Foldable display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010212630.0A CN113450644A (en) | 2020-03-24 | 2020-03-24 | Foldable display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113450644A true CN113450644A (en) | 2021-09-28 |
Family
ID=77806500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010212630.0A Pending CN113450644A (en) | 2020-03-24 | 2020-03-24 | Foldable display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113450644A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096756A (en) * | 2014-05-13 | 2015-11-25 | 三星显示有限公司 | Foldable display apparatus |
| US20160150657A1 (en) * | 2014-11-25 | 2016-05-26 | Samsung Display Co., Ltd. | Display device |
| CN107293215A (en) * | 2016-04-12 | 2017-10-24 | 三星显示有限公司 | Display device |
| CN107833522A (en) * | 2017-10-27 | 2018-03-23 | 武汉华星光电半导体显示技术有限公司 | Display |
| CN108109527A (en) * | 2016-11-24 | 2018-06-01 | 元太科技工业股份有限公司 | Foldable display device and its bearing structure |
| CN109637377A (en) * | 2019-01-31 | 2019-04-16 | 武汉华星光电半导体显示技术有限公司 | Foldable display device |
| CN209418505U (en) * | 2019-02-14 | 2019-09-20 | 上海和辉光电有限公司 | A kind of flexible display apparatus |
| CN110718155A (en) * | 2019-10-24 | 2020-01-21 | 武汉华星光电半导体显示技术有限公司 | Folding display device |
-
2020
- 2020-03-24 CN CN202010212630.0A patent/CN113450644A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105096756A (en) * | 2014-05-13 | 2015-11-25 | 三星显示有限公司 | Foldable display apparatus |
| US20160150657A1 (en) * | 2014-11-25 | 2016-05-26 | Samsung Display Co., Ltd. | Display device |
| CN107293215A (en) * | 2016-04-12 | 2017-10-24 | 三星显示有限公司 | Display device |
| CN108109527A (en) * | 2016-11-24 | 2018-06-01 | 元太科技工业股份有限公司 | Foldable display device and its bearing structure |
| CN107833522A (en) * | 2017-10-27 | 2018-03-23 | 武汉华星光电半导体显示技术有限公司 | Display |
| CN109637377A (en) * | 2019-01-31 | 2019-04-16 | 武汉华星光电半导体显示技术有限公司 | Foldable display device |
| CN209418505U (en) * | 2019-02-14 | 2019-09-20 | 上海和辉光电有限公司 | A kind of flexible display apparatus |
| CN110718155A (en) * | 2019-10-24 | 2020-01-21 | 武汉华星光电半导体显示技术有限公司 | Folding display device |
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Application publication date: 20210928 |