CN111739426B - Flexible display device - Google Patents
Flexible display device Download PDFInfo
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- CN111739426B CN111739426B CN202010633264.6A CN202010633264A CN111739426B CN 111739426 B CN111739426 B CN 111739426B CN 202010633264 A CN202010633264 A CN 202010633264A CN 111739426 B CN111739426 B CN 111739426B
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- flexible
- branch
- display device
- flexible panel
- protrusions
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
A flexible display device includes a flexible panel, a housing and two flexible supporting members. The flexible panel has a bending region. The shell is arranged on the flexible panel and is suitable for bending along with the flexible panel. The two flexible supporting pieces are arranged between the flexible panel and the shell and respectively comprise two branch areas corresponding to the bending areas and two fixing areas which are connected to two sides of the two branch areas and fixed on the shell, wherein the two branch areas are suitable for moving relative to the flexible panel and the shell, each branch area is provided with a plurality of spaced bulges and a plurality of grooves positioned between the bulges, the two branch areas face each other, and at least part of the bulges of one branch area extend into at least part of the grooves of the other branch area.
Description
Technical Field
The present invention relates to a display device, and more particularly, to a flexible display device.
Background
With the advancement of technology, flexible mobile phones and other devices are being developed in the market. In order to make such a device bendable, the back cover may be a two-piece design, and the boundary of the two pieces of structure corresponds to the bending region (the folding line) of the flexible panel, so that the back cover does not affect the bending of the panel.
When such a flexible panel is bent, the back surface of the flexible panel in the bending region (at the folding line) may not be covered by the back cover, which makes the back surface of the flexible panel in the bending region unprotected. In addition, since the flexible panel is exposed on the back of the bending area, dust is easy to enter. When the flexible panel is subsequently unfolded, dust may get caught between the flexible panel and the back cover, and the flexible panel may be damaged.
Disclosure of Invention
The invention provides a flexible display device, which is provided with a protection structure on the back of a bending area of a flexible panel.
The invention provides a flexible display device, which comprises a flexible panel, a shell and two flexible supporting pieces. The flexible panel has a bending region. The shell is arranged on the flexible panel and is suitable for bending along with the flexible panel. The two flexible supporting pieces are arranged between the flexible panel and the shell and respectively comprise two branch areas corresponding to the bending areas and two fixing areas which are connected to two sides of the two branch areas and fixed on the shell, wherein the two branch areas are suitable for moving relative to the flexible panel and the shell, each branch area is provided with a plurality of spaced bulges and a plurality of grooves positioned between the bulges, the two branch areas face each other, and at least part of the bulges of one branch area extend into at least part of the grooves of the other branch area.
In an embodiment of the invention, when the flexible panel is bent, one end of each protrusion abuts against an inner surface of the housing, so that the protrusion is bent.
In an embodiment of the invention, when the flexible panel is bent, one end of each protrusion is not interfered by the housing, so that the protrusion is not bent.
In an embodiment of the invention, the length of each of the protruding portions is L mm, the curvature radius of the bending region of the flexible panel when the flexible panel is folded in half is R mm, and pi R < L < pi R +20 mm.
In an embodiment of the invention, the maximum thickness of the outermost two of the convex portions of the two branch regions is greater than the maximum thickness of the other convex portions.
In an embodiment of the invention, the maximum thickness of the outermost two of the protrusions of the two branch regions is greater than the thickness of the fixed region and less than the sum of the thicknesses of the fixed region and the flexible panel.
In an embodiment of the invention, two ends of the outermost two of the protrusions of the one of the branch regions are respectively connected to two ends of the outermost two of the protrusions of the other branch region.
In an embodiment of the invention, the thickness of the four protruding portions connected in two-by-two manner is greater at a position far away from the two fixing regions than at a position close to the two fixing regions.
In an embodiment of the invention, the projections of the branch regions have various lengths.
In an embodiment of the invention, the length of the convex portions of each branch region is smaller toward the outer side.
In view of the above, the two flexible supporting members of the flexible display device of the invention are disposed between the flexible panel and the housing, and each of the two flexible supporting members includes two branch regions corresponding to the bending region and facing each other. Each branch region has the projections spaced apart and the grooves between the projections, wherein at least part of the projections of one branch region extend into at least part of the grooves of the other branch region. When the flexible display device is bent, the two branch regions of the two flexible supporting members are positioned on the back surface of the bending region of the flexible panel to provide support and protection. In addition, the flexible supporting piece is designed by the concave-convex part extending into the groove, so that the convex part can move or deform along the edge of the groove when moving or deforming, and is not easy to move to other positions (such as positions outside the bending area) so as to ensure that good support and protection can be provided for the bending area when the flexible panel is bent.
Drawings
Fig. 1A to fig. 1C are partial cross-sectional views illustrating a bending process of a flexible display device according to an embodiment of the invention.
FIG. 1D is a top view of two flexible supporting members of the flexible display device of FIG. 1A.
Fig. 2 is a partial cross-sectional view of a flexible display device according to another embodiment of the invention when being bent.
FIG. 3A is a schematic top view of two flexible supports according to another embodiment of the present invention.
Fig. 3B isbase:Sub>A schematic cross-sectional view taken along linebase:Sub>A-base:Sub>A' of fig. 3A.
Fig. 3C is a schematic cross-sectional view taken along line B-B' of fig. 3A.
FIG. 3D is a schematic partial cross-sectional view of a flexible display device using the flexible support of FIG. 3A during bending.
FIG. 4A is a schematic top view of two flexible supports according to another embodiment of the present invention.
Fig. 4B is a schematic sectional view taken along line C-C' of fig. 4A.
Fig. 4C is a schematic sectional view taken along the line D-D' of fig. 4A.
FIG. 4D is a partial cross-sectional view of a flexible display device using the flexible support of FIG. 4A during bending.
FIG. 5 is a schematic top view of two flexible supports according to another embodiment of the present invention.
List of reference numerals
L: length of
R: radius of curvature
T1, T2: maximum thickness
T3, T4, T5, T6: thickness of
100. 100', 100a: flexible display device
110: flexible panel
112: bending zone
120: shell body
130: flexible support
132. 132a, 132b, 132c: branch region
133. 133a, 133b, 133c, 133d, 133e: projection part
134. 134a: end tip
135: concave ditch
136: fixing zone
140. 142: adhesive layer
Detailed Description
Fig. 1A to fig. 1C are schematic partial cross-sectional views illustrating a bending process of a flexible display device according to an embodiment of the invention. FIG. 1D is a top view of two flexible supporting members of the flexible display device of FIG. 1A.
Referring to fig. 1A to fig. 1D, a flexible display device 100 of the present embodiment includes a flexible panel 110, a housing 120, and two flexible supports 130. The flexible panel 110 has a bending region 112. The housing 120 is disposed on the back of the flexible panel 110 and adapted to bend along with the flexible panel 110. The housing 120 is, for example, a flexible housing 120, and in other embodiments, the housing 120 may also have a deformable mesh structure at a position corresponding to the bending region 112. Alternatively, the housing 120 may be two separate hard shells or two soft shells.
Two flexible supports 130 are disposed between the flexible panel 110 and the housing 120. The material of the flexible supporting member 130 may be rubber, silicon, woven cloth, or plastic, but not limited thereto. The flexible supporting member 130 includes two branch regions 132 corresponding to the bending region 112 and facing each other, and two fixing regions 136 connected to two sides of the two branch regions 132 and fixed to the housing 120. The two fixing regions 136 are fixed to the housing 120 by an adhesive layer 140, for example.
In the present embodiment, the two branch regions 132 are adapted to be moved relative to the flexible panel 110 and the housing 120. Therefore, when the flexible display device 100 is bent, the two branch regions 132 of the two flexible supports 130 are located on the back of the bending region 112 of the flexible panel 110 to provide support and protection.
As shown in fig. 1D, in the present embodiment, each branch region 132 has a plurality of protrusions 133 spaced apart from each other and a plurality of grooves 135 located between the protrusions 133. At least part of the projections 133 of one of the branch regions 132 project into at least part of the grooves 135 of the other branch region 132.
When the flexible panel 110 is not bent, the protrusions 133 of the two flexible supports 130 respectively extend into the corresponding grooves 135 and are located on the same plane. As shown in fig. 1C, in the present embodiment, when the flexible panel 110 is bent, the tip 134 of the protruding portion 133 of the flexible support 130 abuts against the inner surface of the housing 120, so that the protruding portion 133 is bent. In this way, the protruding portions 133 cover the back surface of the bending region 112 of the flexible panel 110, so as to protect and support the back surface of the bending region 112 when the flexible panel 110 is bent. Of course, when the flexible panel 110 is bent, the bending form of the protruding portion 133 is not limited thereto.
It should be noted that, in the present embodiment, the flexible support 130 is designed to have the convex-concave shape that the protruding portion 133 protrudes into the groove, so that the protruding portion 133 can move or deform along the edge of the groove when moving or deforming, and is less likely to move in the up-down direction of fig. 1D. Thus, the two branch regions 132 of the two flexible supporting members 130 are less likely to be moved to other positions (e.g., positions other than the bending region 112), so as to ensure that the bending region 112 can be supported and protected well when the flexible panel 110 is bent.
It should be noted that if the protrusion 133 is too long, it may press the flexible panel 110 during bending, and if the protrusion 133 is too short, it cannot protect the entire bending region 112 during bending. In order to reduce the occurrence probability of the above situation, in a preferred embodiment, as shown in fig. 1D, the length of each protrusion 133 is L mm. As shown in fig. 1C, the bending area 112 of the flexible panel 110 has a radius of curvature R mm when folded in half, where rr < L < rr +20 mm. The length of the protrusion 133 may not be pressed to the flexible panel 110 and the entire bending region 112 may be protected by the above design.
For example, if the radius of curvature R is 2 mm, the length L may be 9 mm. If the radius of curvature R is 3 mm, the length L may be 12 mm. If the radius of curvature R is 4 mm, the length L may be 16 mm. If the radius of curvature R is 5 mm, the length L may be 20 mm. Of course, the relationship between the radius of curvature R and the length L is not so limited.
Fig. 2 is a partial cross-sectional view illustrating a flexible display device according to another embodiment of the invention when being bent. Referring to fig. 2, a main difference between the flexible display device 100' of fig. 2 and the flexible display device 100 of fig. 1C is that in the present embodiment, when the flexible panel 110 is bent, the end 134 of the protruding portion 133 is not interfered by the housing 120, and the protruding portion 133 is not bent by the housing 120. In the present embodiment, even though the end 134 of the protrusion 133 is not interfered by the housing 120 and bent into an arc shape, the protrusion 133 still covers the back surface of the bending region 112 of the flexible panel 110, so as to protect and support the back surface of the bending region 112 of the flexible panel 110.
Fig. 3A is a schematic top view of two flexible supports according to another embodiment of the present invention. Fig. 3B isbase:Sub>A schematic sectional view taken along linebase:Sub>A-base:Sub>A' of fig. 3A. Fig. 3C is a schematic sectional view taken along the line B-B' of fig. 3A. FIG. 3D is a schematic partial cross-sectional view of a flexible display device using the flexible support of FIG. 3A during bending.
Referring to fig. 3A to fig. 3D, a main difference between the flexible display device 100a of the present embodiment and the flexible display device 100 of fig. 1A is that in the embodiment of fig. 1A, the thicknesses of the protruding portions 133 of the two branch regions 132 are the same. In the present embodiment, as shown in fig. 3A, the outermost two protrusions 133A of the protrusions 133 and 133A of the two branch regions 132a are the two uppermost and lowermost protrusions 133A in fig. 3A. In the present embodiment, the maximum thickness T2 (fig. 3C) of the outermost two projections 133a of these projections 133, 133a of the two branch regions 132a is greater than the maximum thickness T1 (fig. 3B) of the other projections 133.
As shown in fig. 3C, in the present embodiment, the maximum thickness T2 of the outermost protrusion 133a is greater than the thickness T4 of the fixing region 136, and covers the edge of the flexible panel 110. As shown in fig. 3D, when the flexible display device 100a is bent, the ends 134a of the protrusions 133a are interfered by the housing 120, and the protrusions 133a still cover the edge of the flexible panel 110. Therefore, the outermost protrusion 133a prevents dust from entering the edge of the flexible panel 110.
In addition, in the present embodiment, the maximum thickness T2 of the outermost protrusion 133a is smaller than the sum of the thickness T4 of the fixing region 136 and the thickness T3 of the flexible panel 110. Such a design can prevent the protrusion 133a from protruding from the display surface of the flexible panel 110 to affect the bending condition.
Fig. 4A is a schematic top view of two flexible supports according to another embodiment of the present invention. Fig. 4B is a schematic sectional view taken along line C-C' of fig. 4A. Fig. 4C is a schematic sectional view taken along the line D-D' of fig. 4A. FIG. 4D is a partial cross-sectional view of a flexible display device using the flexible support of FIG. 4A during bending.
Referring to fig. 4A to 4D, in the present embodiment, as shown in fig. 4A, the outermost protrusions 133b of the protrusions 133 and 133b of the two branch regions 132b are the four uppermost and lowermost protrusions 133b in fig. 4A. In the present embodiment, two ends of the outermost two protrusions 133b of the protrusions 133, 133b of one of the branch regions 132b are respectively connected to two ends of the outermost two protrusions 133b of the protrusions 133, 133b of the other branch region 132b (for example, connected by an adhesive layer 142).
As shown in fig. 4B, the thickness of the protrusion 133 is the same as the thickness of the fixing region 136 for the non-outermost protrusion 133. As shown in fig. 4C, the two protrusions 133b connected at the outermost side have a thickness T5 greater at a portion distant from the two fixing regions 136 than at a portion near the two fixing regions 136. Such a design may more completely close the edges of flexible panel 110 to prevent dust.
FIG. 5 is a schematic top view of two flexible supports according to another embodiment of the present invention. Referring to fig. 5, in the present embodiment, the protrusions 133c, 133d, 133e of each branch region 132c have various lengths. For example, the length of the projections 133c, 133d, 133e of each branch region 132 decreases toward the outside. The shorter projection 133c may give way to other mechanisms to provide space.
Of course, in other embodiments, the projections 133c, 133d, 133e of each branch region 132c may have a smaller length closer to the inner side. Alternatively, the length of the projections 133c, 133d, 133e may be adjusted independently of the position near the inside and outside, depending on the mechanical arrangement.
In summary, the two flexible supporting members of the flexible display device of the invention are disposed between the flexible panel and the housing, and each of the two flexible supporting members includes two branch regions corresponding to the bending region and facing each other. Each branch area is provided with the convex parts which are spaced and the grooves which are positioned between the convex parts, wherein at least one part of the convex parts of one branch area extends into at least one part of the grooves of the other branch area. When the flexible display device is bent, the two branch regions of the two flexible supporting members are positioned on the back surface of the bending region of the flexible panel to provide support and protection. In addition, the flexible supporting element can move or deform along the edge of the groove when moving or deforming by means of the concave-convex design that the protruding part extends into the groove, and is not easy to move to other positions (such as positions outside the bending area) so as to ensure that good support and protection can be provided for the bending area when the flexible panel is bent.
Claims (8)
1. A flexible display device includes:
a flexible panel having a bending region;
a housing disposed on the flexible panel and adapted to bend along with the flexible panel; and
two flexible supporting pieces which are arranged between the flexible panel and the shell and respectively comprise two branch areas corresponding to the bending area and two fixing areas which are connected to two sides of the two branch areas and fixed on the shell, wherein the two branch areas are suitable for moving relative to the flexible panel and the shell, each branch area is provided with a plurality of convex parts which are spaced apart and a plurality of grooves which are positioned between the convex parts, the two branch areas face each other, and at least part of the convex parts of one branch area extend into at least part of the grooves of the other branch area,
wherein both ends of the outermost two of the plurality of projections of one of the branch regions are respectively connected to both ends of the outermost two of the plurality of projections of the other of the branch regions,
the thickness of the four convex parts which are connected in pairs at the position far away from the two fixing areas is larger than that of the position close to the two fixing areas.
2. The flexible display device according to claim 1, wherein when the flexible panel is bent, one end of each of the protrusions abuts against an inner surface of the housing, so that the protrusion is bent.
3. The flexible display device of claim 1, wherein when the flexible panel is bent, an end of each of the protrusions is not interfered by the housing, such that the protrusions are not bent.
4. The flexible display device of claim 1, wherein each protrusion has a length of L mm, and the bending area of the flexible panel has a radius of curvature of R mm when folded in half, such that rr < L < rr +20 mm.
5. The flexible display device of claim 1, wherein the maximum thickness of the outermost two of the plurality of protrusions of the two branch regions is greater than the maximum thickness of the other protrusions.
6. The flexible display device of claim 5, wherein the maximum thickness of the outermost two of the protrusions of the two branch regions is greater than the thickness of the fixed region and less than the sum of the thicknesses of the fixed region and the flexible panel.
7. The flexible display device of claim 1, wherein the plurality of protrusions of each of the branch regions have a plurality of lengths.
8. The flexible display device according to claim 7, wherein the length of the plurality of protrusions of each of the branch regions decreases toward the outside.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201962878857P | 2019-07-26 | 2019-07-26 | |
| US62/878,857 | 2019-07-26 | ||
| TW109110260 | 2020-03-26 | ||
| TW109110260A TWI734425B (en) | 2019-07-26 | 2020-03-26 | Flexible display device |
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| Publication Number | Publication Date |
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| CN111739426A CN111739426A (en) | 2020-10-02 |
| CN111739426B true CN111739426B (en) | 2023-01-10 |
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| CN202010633264.6A Active CN111739426B (en) | 2019-07-26 | 2020-07-02 | Flexible display device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113393771B (en) * | 2021-06-28 | 2023-03-24 | 武汉华星光电半导体显示技术有限公司 | Flexible supporting member, display module and mobile terminal |
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