CN109285459B - Foldable display panel's backup pad and foldable display device - Google Patents
Foldable display panel's backup pad and foldable display device Download PDFInfo
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- CN109285459B CN109285459B CN201811446721.XA CN201811446721A CN109285459B CN 109285459 B CN109285459 B CN 109285459B CN 201811446721 A CN201811446721 A CN 201811446721A CN 109285459 B CN109285459 B CN 109285459B
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- foldable display
- support plate
- display panel
- sidewall
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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
Abstract
The invention discloses a support plate of a foldable display panel and a foldable display device. The support plate of the foldable display panel comprises a folding area and a non-folding area; the folding area comprises a plurality of connecting units which are connected in sequence; under the non-bending state, the plurality of connecting units extend along a first direction and are arranged along a second direction, and the second direction is vertical to the first direction; the length of the connecting unit in the second direction is gradually reduced along a third direction, and the third direction is the arrangement direction of the supported foldable display panel and the supporting plate; the connecting unit comprises a central part and a peripheral part, the peripheral part is a tubular structure extending along a first direction, and the central part is positioned on the inner side of the peripheral part; the central part is a hollow structure. According to the technical scheme provided by the embodiment of the invention, the weight of the supporting plate is reduced, and the gap in the hollow structure can play a stress buffering role, so that the impact resistance of each connecting unit in the folding area is improved.
Description
Technical Field
Embodiments of the present invention relate to a foldable display technology, and in particular, to a support plate of a foldable display panel and a foldable display device.
Background
The foldable display device can provide a large display screen when in use and occupies a small storage space when not in use, thereby improving excellent use experience for users.
In the prior art, a foldable display device includes a foldable display panel and a supporting plate for supporting the foldable display panel, the supporting plate includes a folding area and a non-folding area, a plurality of parallel strip-shaped connecting units are disposed in the folding area, and the width of the connecting units is gradually reduced along a direction of the foldable display panel pointing to the supporting plate. Wherein, the linkage unit is the entity structure, adopts the higher material of elastic modulus to form, therefore weight is great, and difficult deformation, and folding district under the state of buckling receives when external shock, and the linkage unit can't effectively disperse the stress that the impact arouses, leads to folding district's shock resistance relatively poor.
Disclosure of Invention
The invention provides a support plate of a foldable display panel and a foldable display device, which are used for reducing the weight of the support plate and improving the shock resistance of each connecting unit in a folding area.
In a first aspect, embodiments of the present invention provide a support plate for a foldable display panel, including a folding region and a non-folding region;
the folding area comprises a plurality of connecting units which are connected in sequence;
in a non-bending state, the plurality of connecting units extend along a first direction and are arranged along a second direction, and the second direction is perpendicular to the first direction; a length of the connection unit in the second direction is gradually reduced along a third direction, which is an arrangement direction of the supported foldable display panel and the support plate;
the connecting unit comprises a central part and a peripheral part, the peripheral part is a tubular structure extending along the first direction, and the central part is positioned on the inner side of the peripheral part;
the central part is of a hollow structure.
In a second aspect, the embodiment of the present invention further provides a foldable display device, including the support plate of the foldable display panel described in the first aspect.
According to the technical scheme provided by the embodiment of the invention, the central part of each connecting unit in the folding area of the support plate of the foldable display panel is arranged to be a hollow structure, wherein each connecting unit also comprises a peripheral part which is a tubular structure with the same extending direction as that of the connecting unit, and the central part is positioned at the inner side of the peripheral part, so that the beneficial effect of reducing the weight of the support plate is achieved, and the gap in the hollow structure can be used as a stress buffering space, thereby improving the impact resistance of each connecting unit in the folding area.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic top view of a support plate of a foldable display panel according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along the dashed line AB of FIG. 1;
FIG. 3 is a schematic view of a further cross-sectional configuration taken along the dashed line AB of FIG. 1;
fig. 4 is a schematic structural diagram of a cross section of a connection unit perpendicular to a first direction according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a cross section perpendicular to a first direction of another connection unit provided in the embodiment of the present invention;
fig. 6 is a schematic structural diagram of a cross section perpendicular to a first direction of another connection unit provided in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a cross section perpendicular to a first direction of another connection unit provided in the embodiment of the present invention;
fig. 8 is a schematic structural diagram of a cross section perpendicular to a first direction of another connection unit provided in the embodiment of the present invention;
fig. 9 is a schematic structural diagram of a cross section perpendicular to a first direction of another connection unit provided in the embodiment of the present invention;
fig. 10 is a schematic structural diagram of a cross section perpendicular to a first direction of another connection unit provided in the embodiment of the present invention;
fig. 11 is a schematic structural diagram of a cross section perpendicular to a first direction of another connection unit provided in the embodiment of the present invention;
fig. 12 is a schematic structural diagram of a cross section perpendicular to a first direction of another connection unit provided in the embodiment of the present invention;
fig. 13 is a schematic structural diagram of a foldable display device according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to specific embodiments, structures, features and effects of a support plate of a foldable display panel and a foldable display device according to the present invention with reference to the accompanying drawings and preferred embodiments.
The embodiment of the invention provides a support plate of a foldable display panel, which comprises a folding area and a non-folding area;
the folding area comprises a plurality of connecting units which are connected in sequence;
in a non-bending state, the plurality of connecting units extend along a first direction and are arranged along a second direction, and the second direction is perpendicular to the first direction; a length of the connection unit in the second direction is gradually reduced along a third direction, which is an arrangement direction of the supported foldable display panel and the support plate;
the connecting unit comprises a central part and a peripheral part, the peripheral part is a tubular structure extending along the first direction, and the central part is positioned on the inner side of the peripheral part;
the central part is of a hollow structure.
According to the technical scheme provided by the embodiment of the invention, the central part of each connecting unit in the folding area of the support plate of the foldable display panel is arranged to be a hollow structure, wherein each connecting unit also comprises a peripheral part which is a tubular structure with the same extending direction as that of the connecting unit, and the central part is positioned at the inner side of the peripheral part, so that the beneficial effect of reducing the weight of the support plate is achieved, and the gap in the hollow structure can be used as a stress buffering space, thereby improving the impact resistance of each connecting unit in the folding area.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other embodiments that depart from the specific details disclosed herein, and it will be recognized by those skilled in the art that the present invention may be practiced without these specific details.
Next, the present invention is described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, the schematic drawings showing the structure of the device are not partially enlarged in general scale for convenience of description, and the schematic drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and height should be included in the actual fabrication.
Fig. 1 is a schematic top view of a supporting plate of a foldable display panel according to an embodiment of the present invention. Fig. 2 is a schematic sectional view along a broken line AB in fig. 1. As shown in fig. 1, the support panel of the foldable display panel includes a folding area 200 and a non-folding area 100, the folding area 200 includes a plurality of connection units 210 connected in sequence, and in a non-folded state, the plurality of connection units 210 extend along a first direction X and are arranged along a second direction Y, which is perpendicular to the first direction X. As shown in fig. 2, the length of the connection unit 210 in the second direction Y is gradually decreased along a third direction Z, the third direction Z is an arrangement direction of the supported foldable display panel and the support plate, the connection unit 210 includes a central portion 212 and a peripheral portion 211, referring to fig. 1 and 2, the peripheral portion 211 is a tubular structure extending along the first direction X, the central portion 212 is located inside the peripheral portion 211, and the central portion 212 is a hollow structure.
It should be noted that, as shown in fig. 1, the surface of the supporting plate close to the foldable display panel is the supporting surface 213 thereof, and in this embodiment, only the central portion 212 is set as a hollow area, so that the supporting surface 213 is a complete plane, and further, the effective support of the supporting plate on the foldable display panel is not affected while the weight of the supporting plate is reduced.
It should be noted that, in the first direction X, the length of the central portion 212 may be equal to the length of the connection unit 210, or the length of the central portion 212 may be smaller than the length of the connection unit 210, in the latter case, the central portion 212 is disposed inside the connection unit 210, and the central portion 212 cannot be viewed from the outside of the connection unit 210.
In addition, with continued reference to fig. 2, the connection unit 210 is wide at the top and narrow at the bottom, and the arrangement is such that the folding region 200 of the support plate has a bending limit when being bent, thereby preventing the devices inside the supported foldable display panel from being damaged due to excessive bending. It is understood that when the folding region 200 of the support plate is folded, the adjacent side walls of the adjacent connection units 210 are pressed together in contact, and the two side walls of each connection unit 210 respectively disposed at the two opposite sides of the central portion 212 along the second direction Y are both subjected to a pressing force, which is referred to as a transverse pressing force for convenience of description. Further, the support surface 213 of the support plate is subjected to a downward pressure from the supported foldable display panel.
It should be noted that fig. 1 and fig. 2 only illustrate the supporting plate including four connecting units 210, but are not limited thereto, and in other implementations of the embodiment, the number of the connecting units 210 in the supporting plate may also be other values.
According to the technical scheme provided by the embodiment, the central part 212 of each connecting unit 210 in the support plate folding area 200 of the foldable display panel is set to be a hollow structure, wherein each connecting unit 210 further comprises the peripheral part 211, each peripheral part 211 is a tubular structure with the same extending direction as that of the corresponding connecting unit 210, and the central part 212 is located on the inner side of the peripheral part 211, so that the beneficial effect of reducing the weight of the support plate is achieved, a gap in each hollow structure can serve as a stress buffering space, and the impact resistance of each connecting unit 210 in the folding area 200 is further improved.
Alternatively, the material of the central portion 212 may be an organic material having an elastic modulus of 2GPa or more.
It should be noted that the elastic modulus, also called young's modulus, is used to characterize the difficulty of elastic deformation of an object, and the larger the elastic modulus of the material of the object is, the less the object is deformed and the higher the rigidity is. Therefore, the central portion 212 formed by the material with the larger elastic modulus is not easy to deform and has larger rigidity, thereby ensuring the effective support of the folding area of the support plate on the foldable display panel and improving the shock resistance of the folding area.
Illustratively, the material of the central portion 212 may be plexiglass, nylon, rigid polyvinyl chloride, polystyrene, or the like.
Fig. 3 is a schematic view of another cross-sectional structure along the dashed line AB in fig. 1. The structure of the support plate shown in fig. 3 is similar to that of the support plate shown in fig. 2, except that the peripheral portion in fig. 3 includes a first side wall 2111 and a second side wall 2112, the first side wall 2111 and the second side wall 2112 are located on opposite sides of the central portion 212 in the third direction Z, and the material of the first side wall 2111 and the second side wall 2112 is an organic material having an elastic modulus of 2GPa or more.
It should be noted that the first side wall 2111 and the second side wall 2112 formed by using a material with a relatively high elastic modulus are not easily deformed and have a relatively high rigidity, on one hand, the first side wall 2111 can better support the foldable display panel, so that a support surface of the support plate is always a plane in the process of supporting the foldable display panel, and the foldable display panel is prevented from sinking in an unfolded state, and on the other hand, the first side wall 2111 and the second side wall 2112 having a relatively high rigidity are not easily damaged, so that the support plate has a relatively long service life.
For example, the material of the first and second sidewalls 2111 and 2112 may be plexiglass, nylon, rigid polyvinyl chloride, polystyrene, or the like.
It is also noted that synthetic fibers may be incorporated into the material forming the first and second sidewalls 2111 and 2112 to improve the fatigue characteristics of the material in repeated bending.
Alternatively, the materials of the first side wall 2111, the second side wall 2112, and the center portion 212 may be the same.
It should be noted that the center portion 212, the first side wall 2111 and the second side wall 2112 are preferably formed by a material having a larger elastic modulus, and therefore, the three portions can be formed by the same material, such an arrangement enables the center portion 212, the first side wall 2111 and the second side wall 2112 to be formed in the same process step, simplifies the manufacturing process, and the integrally formed center portion 212, the first side wall 2111 and the second side wall 2112 are directly connected to each other, thereby increasing the firmness of the connection between the center portion 212 and the first side wall 2111 and the second side wall 2112.
With continued reference to fig. 3, the peripheral portion further includes a third sidewall 2113 and a fourth sidewall 2114, the third sidewall 2113 and the fourth sidewall 2114 being located on opposite sides of the central portion 212 along the second direction Y, the modulus of elasticity of the material of the third sidewall 2113 and the fourth sidewall 2114 being less than or equal to 2 GPa.
It should be noted that the third sidewall 2113 and the fourth sidewall 2114 formed by materials with smaller elastic modulus are easy to deform and have small rigidity, which is beneficial to dispersing the stress caused by the transverse extrusion force in the third sidewall 2113 and the fourth sidewall 2114, and further improves the impact resistance of the folding area.
Alternatively, the poisson's ratio of the materials of the third and fourth side walls 2113 and 2114 may be greater than or equal to 0.35 and less than 0.5.
It should be noted that the larger the poisson's ratio of the material is, the better the elasticity is, so that the third side wall 2113 and the fourth side wall 2114 formed by the material with the larger poisson's ratio have good elasticity, and the dispersion effect on the stress caused by the lateral pressing force is further enhanced.
Fig. 4 is a schematic structural diagram of a cross section of a connection unit perpendicular to a first direction according to an embodiment of the present invention. As shown in fig. 4, a cross section of the hollow structure perpendicular to the first direction X includes at least one supporting column 220, and the supporting columns 220 extend along the third direction Z and are arranged along the second direction Y.
It should be noted that, when the folding region 200 is bent, the lateral pressing force applied to the connection unit 210 may cause a micro deformation of the corresponding sidewall, and a gap between at least one supporting column 220 in the connection unit 210 may accommodate or partially accommodate the deformation, so as to play a role of stress buffering. It should be noted that, because the adjacent side walls of the two connecting units 210 are mutually extruded, the supporting columns 220 are arranged in the cross section of the hollow structure perpendicular to the first direction X, extending along the third direction Z and arranged along the second direction Y, so that at least one supporting column 220 is not in contact with the side wall subjected to the action of the transverse extrusion force, and the deformation on the side wall can be ensured to be accommodated or partially accommodated in the gap of at least one supporting column 220, and will not be directly transmitted to the inside of the connecting unit 210 along the supporting column 220, thereby improving the impact resistance of the folding area 200.
Optionally, fig. 5 is a schematic structural diagram of a cross section of another connection unit perpendicular to the first direction according to an embodiment of the present invention. The structure of the connection unit 210 shown in fig. 5 is similar to that of the connection unit 210 shown in fig. 3, except that the support columns 220 in fig. 5 have a saw-toothed shape.
Alternatively, in other embodiments of the present invention, the supporting column 220 may have other shapes, such as a shape of a straight line and a zigzag interval connection as shown in fig. 6, and a wave shape as shown in fig. 7. And the shape of the supporting column 220 is not limited to the shape given in the above example, and the operator can reasonably select the shape of the supporting column 220 according to actual needs.
It should be noted that, in fig. 4 to fig. 7, the cross section of the hollow structure perpendicular to the first direction X is only taken as an example and is not limited to the example, and in other embodiments of the present embodiment, the number of the support pillars 220 in the cross section of the hollow structure perpendicular to the first direction X may also be other values.
Fig. 8 is a schematic structural diagram of a cross section perpendicular to the first direction of another connection unit provided in the embodiment of the present invention. As shown in fig. 8, a cross section of the hollow structure perpendicular to the first direction X may be a grid structure.
It should be noted that, after the lateral walls of the connection unit 210 are subjected to lateral squeezing force, lateral stress is generated correspondingly inside the connection unit, and the central portion 212 having the grid-shaped hollow structure can buffer the lateral stress and can also buffer stress generated by supporting the foldable display panel in the third direction Z, thereby further improving the impact resistance of the folding area 200.
Further, with continued reference to fig. 8, the individual cells 213 of the mesh structure are polygonal in shape. In other embodiments of this embodiment, the shape of the single mesh 213 of the mesh structure may also be circular, as shown in fig. 9, or elliptical, as shown in fig. 10. In addition, when the shape of the single mesh 213 of the mesh structure is a polygon, the polygon may include a plurality of forms, for example, the shape of the single mesh 213 of the mesh structure shown in fig. 11 and the shape of the single mesh 213 of fig. 8 are both quadrangles, but the forms thereof are different.
Fig. 12 is a schematic structural diagram of a cross section perpendicular to the first direction of another connection unit according to an embodiment of the present invention. As shown in fig. 12, a cross section of the hollow structure perpendicular to the first direction X includes at least one column part 215 and at least one grid part 214, the column part 215 includes at least two supporting parts 2151 arranged along the second direction Y, and each supporting part 2151 is connected to at least one grid line of the adjacent grid part 214.
It should be noted that fig. 12 is only an example and is not limited to the case that the cross section of the hollow structure perpendicular to the first direction X includes one grid part 214 and two column parts 215, and in another embodiment of the present embodiment, the number of the grid part 214 and the column parts 215 in the cross section of the hollow structure perpendicular to the first direction X may also be another value.
Fig. 13 is a schematic structural diagram of a foldable display device according to an embodiment of the present invention. As shown in fig. 13, the foldable display device 11 comprises a support plate 20 of a foldable display panel according to any embodiment of the present invention.
With continued reference to fig. 13, the foldable display device 11 further includes a foldable display panel 10, and the support plate 20 is used to support the foldable display panel 10 to prevent the foldable display panel 10 from sinking in the middle when not folded, and further, to ensure that the support plate 20 does not affect the normal folding of the foldable display panel 10, the folding area 200 of the support plate 20 is disposed opposite to the bendable area 300 of the foldable display panel 10.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. A support panel for a foldable display panel, comprising a folding region and a non-folding region;
the folding area comprises a plurality of connecting units which are connected in sequence;
in a non-bending state, the plurality of connecting units extend along a first direction and are arranged along a second direction, and the second direction is perpendicular to the first direction; a length of the connection unit in the second direction is gradually reduced along a third direction, which is an arrangement direction of the supported foldable display panel and the support plate;
the connecting unit comprises a central part and a peripheral part, the peripheral part is a tubular structure extending along the first direction, and the central part is positioned on the inner side of the peripheral part;
the central part is of a hollow structure;
wherein the material of the central part is an organic material with an elastic modulus of 2GPa or more.
2. The support plate of claim 1, wherein a cross-section of the hollowed-out structure perpendicular to the first direction includes at least one support column extending along the third direction and aligned along the second direction.
3. The support plate of claim 2, wherein the support posts are saw-toothed, linear, or a combination of linear and saw-toothed spacing.
4. The supporting plate as set forth in claim 1, wherein a cross section of the hollowed-out structure perpendicular to the first direction is a lattice structure.
5. The support plate of claim 4, wherein the shape of the individual cells of the cell structure is polygonal, circular or elliptical.
6. The supporting plate as claimed in claim 1, wherein a cross section of the hollow structure perpendicular to the first direction includes at least one column portion and at least one grid portion arranged at intervals, the column portion includes at least two supporting portions arranged along the second direction, and each supporting portion is connected to at least one grid line of an adjacent grid portion.
7. The support plate of claim 1, wherein the peripheral portion includes a first sidewall and a second sidewall; the first side wall and the second side wall are located on opposite sides of the central portion along the third direction;
the material of the first side wall and the second side wall is an organic material with the elastic modulus larger than or equal to 2 GPa.
8. The support plate of claim 7, wherein the first sidewall, the second sidewall, and the central portion are the same material.
9. The support plate of claim 7, wherein the peripheral portion further comprises a third sidewall and a fourth sidewall; the third side wall and the fourth side wall are positioned on two opposite sides of the central part along the second direction;
the modulus of elasticity of the material of the third sidewall and the fourth sidewall is less than or equal to 2 GPa.
10. The support plate of claim 9, wherein the poisson's ratio of the material of the third and fourth sidewalls is greater than or equal to 0.35 and less than 0.5.
11. A foldable display device, characterized in that it comprises a support plate of the foldable display panel according to any of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811446721.XA CN109285459B (en) | 2018-11-29 | 2018-11-29 | Foldable display panel's backup pad and foldable display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811446721.XA CN109285459B (en) | 2018-11-29 | 2018-11-29 | Foldable display panel's backup pad and foldable display device |
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| CN109285459A CN109285459A (en) | 2019-01-29 |
| CN109285459B true CN109285459B (en) | 2020-10-27 |
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2018
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