CN111833751B - Supporting plate, folding display panel and folding display device - Google Patents

Supporting plate, folding display panel and folding display device Download PDF

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Publication number
CN111833751B
CN111833751B CN202010770307.5A CN202010770307A CN111833751B CN 111833751 B CN111833751 B CN 111833751B CN 202010770307 A CN202010770307 A CN 202010770307A CN 111833751 B CN111833751 B CN 111833751B
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Prior art keywords
foldable
folding
display module
layer
display device
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CN202010770307.5A
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CN111833751A (en
Inventor
龚伟
杨皓天
魏向东
郝晓东
王康
张燚
高维兵
徐仁哲
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Chengdu BOE Optoelectronics Technology Co Ltd
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Priority to CN202010770307.5A priority Critical patent/CN111833751B/en
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating 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
    • G09F9/301Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED

Abstract

The embodiment of the application discloses a supporting plate, a folding display panel and a folding display device. In one embodiment, the support plate for the foldable display module comprises a bottom plate and a side plate formed by upwards extending the edge of the bottom plate; the side plates are provided with a first area corresponding to a folding area of the folding display module and a second area corresponding to a non-folding area of the folding display module, the first area and the second area respectively comprise a foldable rigid layer, and the height of the foldable rigid layer of the first area is smaller than that of the foldable rigid layer of the second area. The backup pad of this embodiment can effectively avoid entering into the rete of folding display module assembly from the dust granule in the space between folding display device's hinge and the folding display panel and the space that hinge self exists, guarantees the performance of folding display module assembly, prolongs folding display module assembly's life.

Description

Supporting plate, folding display panel and folding display device
Technical Field
The application relates to the technical field of folding display. And more particularly, to a support plate, a foldable display panel, and a foldable display device.
Background
Compared with the conventional display device, the folding display device can realize larger display area or smaller carrying size due to the folding characteristic, thereby bringing better use experience to users.
Among the prior art, folding display device's folding mainly by hinge control, and there is certain space between hinge and the folding display panel and hinge self, and outside dust particle gets into folding display device from these spaces easily, and it is inside to go deep into each rete of folding display module even to lead to folding display device's dustproof performance relatively poor, influence folding display module's display effect and life.
Disclosure of Invention
An object of the present application is to provide a supporting plate, a foldable display panel and a foldable display device to solve at least one of the problems existing in the prior art.
In order to achieve at least one of the above purposes, the following technical scheme is adopted in the application:
the application provides a support plate for folding a display module, wherein the support plate comprises a bottom plate and a side plate formed by upwards extending the edge of the bottom plate; the side plates are provided with a first area corresponding to a folding area of the folding display module and a second area corresponding to a non-folding area of the folding display module, the first area and the second area respectively comprise a foldable rigid layer, and the height of the foldable rigid layer of the first area is smaller than that of the foldable rigid layer of the second area.
The backup pad that this application first aspect provided can effectively avoid entering into the rete of folding display module assembly from the dust granule that gets into in the space between folding display device's hinge and the folding display panel and the space that hinge self exists, guarantees the performance of folding display module assembly, prolongs the life of folding display module assembly.
In one embodiment, the first region includes a foldable rigid layer and a first flexible layer and a second flexible layer respectively disposed on both sides of the foldable rigid layer.
This embodiment is through setting up first flexible layer and the flexible layer of second, can be when guaranteeing that the backup pad effectively prevents that the dust granule from entering into the rete of folding display module assembly, improves the folding performance of the position in the folding district of the folding display module assembly of correspondence of backup pad.
In one embodiment, the first region includes a first foldable rigid layer, a first flexible layer and a second flexible layer respectively disposed at two sides of the first foldable rigid layer, a second foldable rigid layer disposed at a side of the first flexible layer away from the first foldable rigid layer, and a third foldable rigid layer disposed at a side of the second flexible layer away from the first foldable rigid layer.
This embodiment can further improve the folding performance of the position of the folding district of the folding display module assembly of the correspondence of backup pad and avoid the effect that the dust granule enters into the rete of folding display module assembly.
In an embodiment, the bottom plate is provided with a first hole, and a sleeve for being embedded into a second hole formed by the foldable display module is arranged at the edge of the first hole.
This embodiment is through setting up the sleeve, can effectively protect the camera that sets up in first downthehole, and folding display device is folding in-process simultaneously, and the sleeve can retrain the rete near the sleeve, prevents that the relative position of the rete near folding in-process sleeve from changing to avoid the risk of the light leak that the rete dislocation leads to.
In one embodiment, the height of the sleeve is set such that when the sleeve is inserted into the second hole, the top end of the sleeve abuts against the cover plate of the foldable display module.
This embodiment further retrains a plurality of retes near the sleeve, ensures that the relative position of the rete near the sleeve does not change in folding process, and then reduces the risk of the light leak that the rete dislocation leads to.
In one embodiment, the material of the bottom plate and the foldable rigid layer is stainless steel.
In one embodiment, the material of the sleeve is stainless steel.
In one embodiment, the material of the first flexible layer and the second flexible layer is foam.
In one embodiment, the height of the side plate is set to be flush with the top end of the cover plate of the foldable display module after the support plate is assembled with the foldable display module.
This embodiment can ensure folding display device folding in-process, and the curb plate of backup pad can effectively shelter from whole folding display module's rete, prevents that the dust granule from entering into in folding display module's the rete.
In one embodiment, an opening is formed in a position of the side plate corresponding to the bending area of the foldable display module.
In this embodiment, through forming the opening to realize dodging to assemblies such as flexible Printed circuit board FPC (flexible Printed circuit), do not influence the equipment process of current folding display module assembly.
The second aspect of the present application provides a foldable display panel, which includes a foldable display module and a support plate provided by the first aspect of the present application.
A third aspect of the present application provides a foldable display device comprising the foldable display panel provided in the second aspect of the present application.
The beneficial effect of this application is as follows:
the supporting plate can effectively prevent dust particles entering from a gap between a hinge of the folding display device and the folding display panel and a gap existing in the hinge from entering a film layer of the folding display module, so that the performance of the folding display module is ensured, and the service life of the folding display module is prolonged; in addition, through setting up the sleeve at the backup pad, can effectively protect the camera that sets up in first downthehole, folding display device is folding in-process simultaneously, and the sleeve can retrain the rete near the sleeve, prevents that the relative position of the rete near folding in-process sleeve from changing to avoid the risk of the light leak that the rete dislocation leads to.
Drawings
The following describes embodiments of the present application in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural view of a support plate of an embodiment of the present application.
Fig. 2 shows an enlarged cross-sectional view a-a of fig. 1.
Fig. 3 shows an enlarged cross-sectional view B-B of fig. 1.
Fig. 4 illustrates a structural cross-sectional view of a flexible region of an embodiment of the present application.
Fig. 5 shows an enlarged cross-sectional view C-C of fig. 1.
Fig. 6 shows a structural cross-sectional view of a flexible region of another embodiment of the present application.
FIG. 7 shows a schematic structural view of a sleeve of one embodiment of the present application.
Fig. 8 shows an enlarged cross-sectional view of D-D of fig. 1.
Detailed Description
In order to more clearly explain the present application, the present application is further described below with reference to the embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not intended to limit the scope of the present application.
To solve the technical problem in the prior art, as shown in fig. 1, an embodiment of the present application provides a supporting plate 10, where the supporting plate 10 is used for a foldable display module, and is specifically attached below the foldable display module, for example, in an embodiment, the foldable display module includes a protective layer, a touch control film layer, a polarizing layer, a display film layer, a flexible substrate, a bottom film layer, and other protective film layers, which are sequentially stacked, and the supporting plate 10 is located below the bottom film layer of the foldable display module to support the foldable display module, and the supporting plate 10 includes a bottom plate 11 and a side plate 12 formed by extending an edge of the bottom plate 11 upward; the side plate 12 is provided with a flexible region 121 corresponding to a folding region of the folding display module and a rigid region 122 corresponding to a non-folding region of the folding display module, the flexible region 121 and the rigid region 122 respectively comprise a foldable rigid layer 20, and the height of the foldable rigid layer 20 of the flexible region 121 is less than that of the foldable rigid layer 20 of the rigid region 122. Wherein the overall height of the flexible region 121 is the same as the overall height of the rigid region 122; in addition, in some embodiments, the thickness of the region of the bottom panel 11 corresponding to the folding region of the foldable display module is the same as the thickness of the region of the bottom panel 11 corresponding to the non-folding region of the foldable display module.
As shown in fig. 1, in the present embodiment, the foldable display module is a two-fold foldable display module, the folding display module comprises two non-folding areas and a folding area positioned between the two non-folding areas, the non-folding areas are folded by taking the central line of the folding area as an axis, wherein the central line of the folding area is parallel to the upper side or the lower side of the supporting plate 10, correspondingly, the upper side, the left side and the right side of the supporting plate 10 are respectively provided with a side plate 12 formed by the upper side, the left side and the right side of the bottom plate 11 extending upwards, the flexible regions 121 of this embodiment are respectively provided on the side plates 12 on the left and right sides of the support plate 10, and the upper side plate 12 and the left and right side plates 12 of the support plate 10 are rigid regions 122, the flexible regions 121 of this embodiment are located between two rigid regions 122 on the left side of the support plate 10 and between two rigid regions 122 on the right side of the support plate 10, respectively.
It is understood that, in some embodiments, the foldable display module is bent with a center line connecting the upper side and the lower side of the supporting board 10 as a bending axis, i.e., the center line of the folding area of the foldable display module is parallel to the left side or the right side of the supporting board 10. The flexible regions 121 are provided on the side plates 12 corresponding to the upper and lower sides of the support plate 10. This application does not restrict the position of bending axle and the direction of buckling of folding display module assembly.
The backup pad that this embodiment provided can effectively avoid entering into the rete of folding display module from the hinge of folding display device and the space between the folding display panel and the space that hinge self exists in the dust granule that gets into, guarantees the performance of folding display module, prolongs folding display module's life.
It should be noted that in some embodiments, the foldable display module includes two foldable areas and three non-foldable areas, i.e. the foldable display module is a flexible OLED display module with a three-folded structure, and the positions and the number of the flexible areas and the rigid areas of the supporting plate and the side plate can be changed accordingly.
In some embodiments, rigid region 122 may be provided as being entirely comprised of foldable rigid layer 20.
In some embodiments, the side panel 12 is formed with an opening 30 at a position corresponding to the bending region of the foldable display module. In the embodiment shown in fig. 1, the lower side of the side panel 12 is formed with an opening 30 as a bending region corresponding to the foldable display module. Specifically, as shown in fig. 2, fig. 2 is an enlarged cross-sectional view taken along a-a of fig. 1, i.e., a sectional view of the support plate formed along the center line of the upper side thereof. Taking the example that the foldable display device of the embodiment shown in fig. 2 is an AMOLED (Active-matrix organic light-emitting diode), in this embodiment, an OCA layer (optical transparent adhesive layer) 50, a POL layer (linear polarization layer) 60, a panel layer 70, a BF layer (bottom film layer) 80, and an OCA layer (optical transparent adhesive layer) 50 are stacked between the support plate 10 and the cover plate 40 of the foldable display module. The right side of fig. 2 is the upper side of the support plate 10, and an upper side plate 12 is provided, and the left side of fig. 2 is the lower side of the support plate 10, and an opening 30 is formed.
In this embodiment, the opening 30 is formed at the lower side of the side plate 12, so that the components such as a flexible Printed circuit (fpc) and the like are avoided, the assembly of other components is not disturbed, and the assembly process of the existing folding display module is not affected. It should be noted that the size of the opening may be determined according to the size of components such as a flexible Printed circuit (fpc), an assembly process design, or an actual design requirement of the foldable display device. As shown in fig. 1, the entire lower side of the support plate 10 is formed to be open, i.e., the lower side of the support plate 10 is not provided with the side plate 12 formed by extending upward from the lower side of the bottom plate 11. It is understood that, in another embodiment, the lower side of the supporting plate is provided with two side plates extending upward from the lower side of the bottom plate and an opening located between the two side plates, the opening is used for avoiding components such as a flexible Printed circuit (fpc), and the like, and the present application does not limit the present invention further.
In some embodiments, the height of the side plate 12 is set such that the top end of the side plate 12 is flush with the top end of the cover plate 40 of the foldable display module when the support plate 10 is assembled with the foldable display module. FIG. 3 is an enlarged cross-sectional view taken along line B-B of FIG. 1, which is a sectional view of the supporting board corresponding to the non-folding area of the foldable display module. Taking the foldable display device of the embodiment shown in fig. 3 as an AMOLED as an example, in this embodiment, the heights of the side plates 12 on the left and right sides of the supporting plate 10 are flush with the top end of the cover plate 40 of the foldable display module, so that when the foldable display device is folded, the side plates 12 of the supporting plate 10 can effectively shield the film layer of the whole foldable display module, thereby preventing dust particles from entering the film layer of the foldable display module, further ensuring the performance of the foldable display device, and prolonging the service life of the foldable display device.
In some embodiments, as shown in fig. 4, the flexible region 121 includes a foldable rigid layer 20 and an upper flexible layer 90 and a lower flexible layer 91 respectively disposed at two sides of the foldable rigid layer 20, wherein the upper flexible layer 90 and the lower flexible layer 91 are respectively fixed to two sides of the foldable rigid layer 20 by a double-sided tape 92 (DST). This embodiment is through configuring last flexible layer 90 and lower flexible layer 91, when guaranteeing that backup pad 10 effectively prevents that the dust granule from entering into the rete of folding display module assembly, improves the folding performance of the position in the folding district of folding display module assembly of the correspondence of backup pad 10, protects folding display module assembly better.
Referring to fig. 5, fig. 5 is an enlarged cross-sectional view taken along line C-C of fig. 1, i.e., a sectional view of the supporting board 10 corresponding to the folding area of the foldable display module. Taking the AMOLED as an example of the folding display device of the embodiment shown in fig. 5, in this embodiment, an upper flexible layer 90, a double-sided adhesive layer 92, a foldable rigid layer 20, a double-sided adhesive layer 92 and a lower flexible layer 91 are sequentially stacked on the left side plate 12 and the right side plate 12 of the support plate 10.
In other embodiments, as shown in fig. 6, the flexible region comprises a first foldable rigid layer 21, a first flexible layer 93 and a second flexible layer 94 respectively disposed on two sides of the first foldable rigid layer 21, a second foldable rigid layer 22 disposed on a side of the first flexible layer 93 away from the first foldable rigid layer 21, and a third foldable rigid layer 23 disposed on a side of the second flexible layer 94 away from the first foldable rigid layer 21, wherein the layers are bonded and fixed by a double-sided tape 92 (DST). This embodiment can further improve the folding performance of the position of the folding district of the folding display module assembly of the correspondence of backup pad and avoid the effect that the dust granule enters into the rete of folding display module assembly.
In some embodiments, the material of the bottom plate 11 and the foldable rigid layer 20 is stainless steel. In one specific example, the material of the bottom plate 11 and the foldable rigid layer 20 is a polymer, such as polymethyl methacrylate (PMMA), Polycarbonate (PC), Polyacrylate (PA), polyvinyl alcohol (PVA), Acrylonitrile Butadiene Styrene (ABS), polyethylene terephthalate (PET), respectively. In the embodiment where the materials of the bottom plate 11 and the foldable rigid layer 20 are stainless steel, respectively, the supporting plate 10 has a high restoring force, and the thickness of the supporting plate 10 can be reduced, so that the overall thickness of the foldable display device is reduced, the light and thin design is realized, and heat dissipation is facilitated. In other embodiments, the material of upper flexible layer 90 and lower flexible layer 91 is the bubble cotton respectively, and the bubble cotton is used for filtering out the dust granule, prevents effectively that the dust granule from entering into the rete of folding display module assembly.
In addition, in order to obtain a larger display area in the prior art, a scheme of punching holes in an AA area (display area) is generally adopted, that is, the display panel structure is punched, and a camera is embedded into a screen. However, for the foldable display device, due to the film layer dislocation phenomenon in the folding process of the foldable display device, the relative position of the film layer near the AA area hole changes and cannot be kept unchanged, so that the problem of light leakage at the AA area hole of the foldable display device is easily caused.
In some embodiments, as shown in fig. 1, 7, and 8, the bottom plate 11 defines a first hole 100, the foldable display module defines a second hole (not shown) corresponding to the first hole, and a sleeve 101 for inserting into the second hole defined by the foldable display module is disposed at an edge of the first hole 100, and a camera (not shown) is disposed in the sleeve 101, wherein an inner diameter and an outer diameter of the sleeve 101 are respectively determined by a size of the camera and an aperture of the first hole 100. This embodiment is through setting up sleeve 101, can effectively protect the camera that sets up in first hole 100, and folding display device is folding in-process simultaneously, and sleeve 101 can restrain the rete near the sleeve, prevents that the relative position of the rete near sleeve 101 changes in folding in-process to avoid the risk of the light leak that the rete dislocation leads to.
In some embodiments, the material of sleeve 101 is stainless steel. In other embodiments, the materials of the sleeve 101, the bottom plate of the support plate 10 and the foldable rigid layer 20 are stainless steel, and the sleeve 101, the bottom plate 11 of the support plate 10 and the foldable rigid layer 20 can be integrally formed, so as to enhance the overall structural strength of the support plate 10. In still other embodiments, the sleeve 101, the bottom plate 11 of the supporting plate 10 and the side plate 12 may be assembled in advance or integrally formed in advance, so that the assembling process of the foldable display module is not affected.
In some embodiments, the height of the sleeve 101 is set such that when the sleeve 101 is inserted into the second hole, the top end of the sleeve 101 abuts against the cover plate 40 of the foldable display module, i.e. the height of the sleeve 40 is determined by the thickness of the foldable display module. Specifically, referring to fig. 8, fig. 8 is a cross-sectional view of fig. 1 enlarged from D to D, and it should be noted that fig. 8 is only an exemplary view, and as shown in fig. 8, the foldable display device of the embodiment is an AMOLED, in this embodiment, when the bottom plate 11 of the support plate 10 is bonded and fixed to the foldable display module, the top end of the sleeve 101 is abutted to the cover plate 40 of the foldable display module, and an OCA layer (optical Clear Adhesive layer, an Adhesive agent for adhering transparent optical elements (such as lenses) 50, a POL layer (linear polarization layer) 60, a panel layer 70, a BF layer (bottom film layer) 80, and an OCA layer (optical transparent Adhesive layer) 50 are sequentially stacked between the cover plate 40 and the support plate 10 of the foldable display module. When folding display module assembly is folding, sleeve 101 can be to the OCA layer (optics transparent adhesive layer) 50 between apron 40 and the bottom plate 11 of backup pad 10, POL layer (linear polarization layer) 60, panel layer 70, BF layer (bottom film layer) 80 and OCA layer (optics transparent adhesive layer) 50 do further restraint, ensure that the relative position of a plurality of retes between apron 40 and the backup pad 10 bottom plate 11 of folding display module assembly does not change at folding in-process, and then reduce the risk of the light leak that the rete dislocation leads to.
It should be noted that, in fig. 5 to 8, a certain gap exists between the plurality of films between the cover plate 40 and the bottom plate 11 of the support plate 10 and the side plate 12 of the support plate 10, mainly because of the assembling process and material of the conventional foldable display device, a tolerance needs to be present to facilitate the assembly.
Another embodiment of the present application provides a foldable display panel, which includes a foldable display module and the supporting plate 10.
Another embodiment of the present application provides a foldable display device including the foldable display panel described above and a hinge structure disposed below the support plate 10. The structure of the hinge is as follows: the foldable display device comprises a supporting layer for bearing the foldable display panel, a first supporting member, a bending supporting member and a second supporting member, wherein the first supporting member, the bending supporting member and the second supporting member are used for driving the supporting layer to be folded or unfolded, so that the foldable display device is folded.
In addition, the foldable display device may be any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like, which is not limited in this embodiment.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is further noted that, in the description of the present application, 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. 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.
It should be understood that the above-mentioned examples are given for illustrative purposes only and are not intended to limit the present disclosure to any particular embodiment, and that various other modifications and variations in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application.

Claims (10)

1. The folding display device is characterized by comprising a hinge and a folding display panel, wherein the folding display panel comprises a folding display module and a support plate, the hinge is arranged on the side, far away from the folding display module, of the support plate, and the support plate comprises a bottom plate and a side plate formed by upwards extending the edge of the bottom plate; the side plates are provided with a first area corresponding to a folding area of the folding display module and a second area corresponding to a non-folding area of the folding display module, the first area and the second area respectively comprise a foldable rigid layer, and the height of the foldable rigid layer of the first area is smaller than that of the foldable rigid layer of the second area.
2. The foldable display device of claim 1, wherein the first region comprises a foldable rigid layer and a first flexible layer and a second flexible layer respectively disposed on two sides of the foldable rigid layer.
3. The foldable display device according to claim 1, wherein the first region comprises a first foldable rigid layer, a first flexible layer and a second flexible layer respectively disposed on both sides of the first foldable rigid layer, a second foldable rigid layer disposed on a side of the first flexible layer remote from the first foldable rigid layer, and a third foldable rigid layer disposed on a side of the second flexible layer remote from the first foldable rigid layer.
4. The foldable display device of claim 1, wherein the bottom plate defines a first hole, and a sleeve is disposed at an edge of the first hole for being inserted into a second hole defined by the foldable display module.
5. The foldable display device of claim 4, wherein the sleeve has a height such that a top end of the sleeve abuts a cover plate of the foldable display module when the sleeve is inserted into the second hole.
6. The foldable display device of any one of claims 1 to 5, wherein the material of the base plate and the foldable rigid layer is stainless steel.
7. A folding display device according to claim 4 or 5, wherein the material of said sleeve is stainless steel.
8. A foldable display device according to claim 2 or 3, wherein the material of the first and second flexible layers is respectively foam.
9. The foldable display device of claim 1, wherein the side panels have a height such that when the support panel is assembled with the foldable display module, top ends of the side panels are flush with top ends of the cover panel of the foldable display module.
10. The foldable display device of claim 1, wherein the side panel has an opening formed at a position corresponding to the bending region of the foldable display module.
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