JP2018017745A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of preventing a flexible display on a support medium from separating.SOLUTION: A display device 1 performs display by a flexible display 30 having flexibility. The flexible display 30 is disposed on an intermediate sheet 20 on an upper face of a support medium 10. The support medium 10 is composed of a material having elasticity, and has a notch 11 only at a lower face. When the display device 1 is flexed, the support medium 10 is in a shape bent in a vicinity of the notch 11. An upper face of the support medium 10 is prevented from stretching, so that a separation or damage of the flexible display 30 can be prevented.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device.

  At present, a flexible display in which an OLED (organic light emitting diode) is formed on a film attracts attention (for example, Patent Document 1). The flexible display is lightweight and thin, and can be bent, so that the design is high.

  A heat-resistant polymer film material such as PI (polyimide) is used for the base material of the flexible display, and it becomes very thin to make use of the characteristics of the flexible display. Considering the actual usage, a certain degree of thickness is required while having flexibility (flexibility), and it is preferable that the flexible display is provided on an appropriate support.

JP2016-080869A

  In a case where a flexible display is provided on a support, the problem is peeling or damage of the flexible display when bent.

  For example, it is conceivable to realize flexibility by using a stretchable (elastic) material for the support and take advantage of the characteristics of the flexible display. However, as shown in FIG. When the flexible display 30 is provided and is bent so as to be convex upward, the upper surface of the support 110 expands as indicated by an arrow (the lower surface contracts). The stretchability of the base material used in the flexible display 30 is generally small, cannot follow the extension of the upper surface of the support 110, and may be peeled off or damaged.

  This invention is made | formed in view of said problem, and it aims at providing the display apparatus which can prevent peeling of the flexible display on a support body.

  The present invention for solving the above-described problems is a display device that performs display by a flexible display having flexibility, wherein the flexible display is provided on a flexible support, and the support is The display device is characterized in that the surface of the flexible display follows the deformation of the flexible display when the display device is bent without expanding or contracting.

  In the present invention, by providing a flexible display on a flexible support, the display device can have a certain thickness and flexibility. Furthermore, when the display device is bent, the surface of the support on the flexible display side follows the deformation of the flexible display without expanding or contracting, so that the above-described peeling of the flexible display can be prevented. “Following without expansion / contraction” does not mean that the support does not expand / contract at all, and is accompanied by some expansion / contraction to the extent that the flexible display does not peel off. It includes cases that are deformed by factors other than expansion and contraction and follow the deformation of the flexible display.

For example, the support is formed of a stretchable material and has a recess on the surface opposite to the flexible display side. For example, a plurality of the recesses are arranged vertically and horizontally on the plane of the support.
In this case, when the display device is bent, the vicinity of the concave portion is bent and the support is deformed, whereby the expansion and contraction of the support is suppressed, and the flexible display can be suitably prevented from peeling. By providing a plurality of recesses vertically and horizontally, peeling of the flexible display can be prevented regardless of the direction in which the display device is bent.

It is also desirable that the stretchability of a portion near the surface of the support on the flexible display side is lower than the stretchability of other portions. For example, the support has a cavity inside, and the cavity is provided in a portion other than the vicinity portion at a higher density than the vicinity portion.
Even with such a difference in stretchability, the support can be made flexible, and expansion and contraction of the surface on the flexible display side can be suppressed, and peeling of the flexible display can be suitably prevented. Specifically, the difference in stretchability can be realized by configuring the support with a sponge or the like having a cavity inside as described above and setting the density of the cavity as described above.

The support may have a bellows portion. The surface of the support on the flexible display side is preferably flat.
In this case, the support can have flexibility by the structure of the support having the bellows portion. Therefore, the support can be formed of a non-stretchable material and can prevent the flexible display from peeling when the display device is bent. Further, by flattening the surface of the support on the side of the flexible display, the support and the flexible display can be closely attached and firmly fixed.

The support may be formed by stacking a plurality of sheets having flexibility.
In this case, the support can be made flexible by the support having a plurality of sheets deformed like a paper bundle. Similarly to the above, since the sheet does not need to be stretchable, peeling of the flexible display when the display device is bent can be prevented.

It is desirable that an intermediate sheet having flexibility be provided between the support and the flexible display.
This intermediate sheet only needs to have flexibility, and does not need to be stretchable.Even if the intermediate sheet is provided between the support and the flexible display, even if the intermediate sheet is peeled off from the support, It is possible to prevent a load from being applied directly to the flexible display and to prevent damage to the flexible display.

The display device preferably includes two sets of the flexible display and the support, and the ends of the flexible display and the support of each set are held by a holding unit.
Thereby, it can be set as a display apparatus like a book and a booklet which utilized the characteristic of the flexible display, and can be handled easily like a book. Also, the displayed content is easy to see, such as books, and there is little discomfort. Furthermore, the display device can be folded to save space and have excellent mobility.

  According to the present invention, it is possible to provide a display device that can prevent peeling of a flexible display on a support.

FIG. 3 shows a display device 1. The figure which shows the state which bent the display apparatus. The figure which shows the state which bent the display apparatus. The figure which shows display apparatus 1 '. The figure which shows the display apparatus 1a. The figure which shows display apparatus 1a '. The figure which shows the display apparatus 1b. The figure which shows display apparatus 1c, 1c '. The figure which shows the display apparatus 1d. The figure which shows display apparatus 1d '. The figure which shows the display apparatus 1e. The figure which shows the expansion-contraction of the support body 110. FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram showing a display device 1 according to a first embodiment of the present invention. In this display device 1, an intermediate sheet 20 is provided on the upper surface of a support 10, and a flexible display 30 is provided thereon. The support 10 and the intermediate sheet 20, and the intermediate sheet 20 and the flexible display 30 are fixed by adhesion or the like.

  The support 10 is for giving the display device 1 a certain thickness to improve usability, and the support 10 has flexibility to make use of the characteristics of the flexible display 30. Therefore, in this embodiment, a material having a stretchability (elasticity) greater than at least the intermediate sheet 20 and the flexible display 30 is used as the support 10. Examples of such a material include rubber and urethane. For example, a pulverized urethane binder that is an aggregate of finely pulverized urethane, a black cell sponge made of natural rubber, and the like can be used.

  In the present embodiment, the upper surface of the support 10 (the surface on the flexible display 30 side) is deformed by deformation of the intermediate sheet 20 and the flexible display 30 (hereinafter also referred to as the flexible display 30) when the display device 1 is bent. In order to make it follow without expanding and contracting, a cut 11 (concave portion) is formed on the lower surface of the support 10 (the surface opposite to the flexible display 30 side).

  The intermediate sheet 20 is provided between the support 10 and the flexible display 30 and has a role of preventing the flexible display 30 from being directly loaded and preventing the flexible display 30 from being damaged. The intermediate sheet 20 is less flexible than the support 10 but is thin and flexible, such as PET (polyethylene terephthalate), PP (polypropylene), PC (polycarbonate), COP (cycloolefin), COC (cycloolefin copolymer) A resin film made of PEN (polyethylene naphthalate), acrylic resin, or the like can be used.

  The flexible display 30 is configured by providing an OLED (organic light emitting diode) or the like on a film-like substrate. As the base material, a resin film such as PI (polyimide) which is thin and flexible although it has the same stretchability as the intermediate sheet 20 and is lower than the support 10.

  FIG. 2 is a diagram illustrating a state in which the display device 1 is bent so that the top is convex. In the present embodiment, when the display device 1 is bent so that the upper side is convex, the support 10 is bent in the vicinity of the notch 11, thereby following the deformation of the flexible display 30 and the like. Therefore, unlike the case where there is no notch 11 like the support body 110 of FIG. 12, extension of the upper surface of the support body 10 is suppressed.

  Therefore, even if the flexible display 30 or the like has a lower elasticity than the support 10, there is no fear of peeling from the support 10, and damage to the flexible display 30 or the like can be prevented. In FIG. 2 and FIGS. 3 to 5 to be described later, the bent shape of the support 10 and the like is slightly exaggerated for explanation.

  FIG. 3 is a diagram showing a state in which the display device 1 is bent so that the bottom is convex. In this case, the support 10 is bent in the vicinity of the notch 11 in the opposite direction to the above, so that the upper surface of the support 10 is bent. Shrinkage is suppressed and the same effect is obtained.

  As described above, according to the present embodiment, the display device 1 can have a certain thickness and flexibility by providing the flexible display 30 or the like on the flexible support 10. . Furthermore, when the display device 1 is bent, the upper surface of the support 10 follows the deformation of the flexible display 30 and the like without expanding and contracting, and thus the above-described peeling and damage of the flexible display 30 can be prevented.

  In the present embodiment, the support 10 is made of a material having elasticity, and the support 10 is made flexible. At this time, the notch 11 is formed on the lower surface of the support 10, so that the display device 1 is formed. When bent, the vicinity of the notch 11 is bent and the support 10 is deformed, whereby the expansion and contraction of the support 10 is suppressed, and peeling and damage of the flexible display 30 and the like can be suitably prevented.

  Further, by providing the intermediate sheet 20 between the support 10 and the flexible display 30, even if the intermediate sheet 20 is peeled off from the support 10, it is possible to prevent the flexible display 30 from being directly loaded. Damage to the flexible display 30 can be prevented.

  However, the present invention is not limited to this. For example, as shown in the display device 1 ′ in FIG. 4, it is possible to provide a cut 11 on the upper surface of the support 10 a. However, since a gap is formed between the flexible display 30 and the like and the support 10a, from the viewpoint of fixing the flexible display 30 and the like, the upper surface of the support 10 is flat as shown in FIG. It is more desirable to fix it in close contact with the upper surface.

  Further, other layers such as a protective layer and a polarizing layer may be additionally provided on the upper surface of the flexible display 30. In some cases, the intermediate sheet 20 may be omitted, and the flexible display 30 may be directly fixed to the support 10 by adhesion or the like.

  Hereinafter, other examples of the present invention will be described as second to sixth embodiments. Each embodiment will be described with respect to differences from the embodiments described so far, and the same points will be denoted by the same reference numerals in the drawings and the like, and description thereof will be omitted. In addition, the configurations described in each embodiment including the first embodiment can be combined as necessary.

[Second Embodiment]
FIG. 5A is a diagram showing a display device 1a according to the second embodiment. As shown in the drawing, in the second embodiment, two sets of the support body 10, the intermediate sheet 20, and the flexible display 30 described in the first embodiment are prepared, and each set of the support body 10 and the intermediate sheet 20 is prepared. And the edge part of the flexible display 30 is hold | maintained with the holding | maintenance part 40, and it arrange | positions so that flexible displays 30 may face each other.

  The holding unit 40 can store the circuit of the flexible display 30 and can be opened like a book or a booklet by bending each pair of support members 10 and the like as shown in FIG. it can.

  Also in this case, since the notch 11 is provided in the support 10, the upper surface of the support 10 follows the deformation of the flexible display 30 and the like without expanding and contracting, as in the first embodiment, and the flexible display 30 and the like. Peeling and damage can be prevented. Moreover, in 2nd Embodiment, it can be set as the display apparatus 1a like a book or a booklet using the characteristic of the flexible display 30, and can handle it like a book etc. easily. Also, the displayed content is easy to see, such as books, and there is little discomfort. Further, the display device 1a can be folded as shown in FIG. 5A, saving space and being excellent in mobility.

  Further, as shown in the display device 1 a ′ in FIG. 6, a flexible frame 50 may be provided so as to surround the support 10, the intermediate sheet 20, and the flexible display 30. The support body 10 and the like can be protected by the frame body 50, and the circuit and the like of the flexible display 30 can be accommodated therein. The frame 50 can be made of a material having wear resistance and flexibility, and for example, a thin resin, rubber, cloth, or the like can be used. A similar frame can also be provided for the display device 1 of the first embodiment.

[Third Embodiment]
FIG. 7A is a diagram showing a display device 1b according to the third embodiment. This display device 1b differs from the first embodiment in that a hole 13 (concave portion) is provided in the lower surface of the support 10b instead of a cut.

  FIG.7 (b) is a figure which shows the lower surface of the support body 10b. In the present embodiment, a plurality of circular holes 13 are arranged vertically and horizontally, and the holes 13 are provided on the entire surface of the support 10b. The interval and size of the holes 13 can be determined as appropriate.

  Also in this embodiment, the hole 13 functions in the same manner as the notch 11 described above, and the upper surface of the support 10b can follow the deformation of the flexible display 30 and the like without expanding and contracting, and peeling and damage of the flexible display 30 and the like can be prevented. In addition, by providing a plurality of holes 13 vertically and horizontally as shown in FIG. 7B, peeling and damage of the flexible display 30 and the like can be prevented regardless of the direction in which the display device 1b is bent.

[Fourth Embodiment]
FIG. 8A is a diagram showing a display device 1c according to the fourth embodiment. In this display device 1 c, the stretchability of the vicinity portion 101 on the upper surface of the flexible support 10 c is made lower than the portion 102 other than the vicinity portion 101.

  Specifically, the support 10c has a sponge shape, and the support 10c is deformed when the internal cavity 14 (air bubbles) is crushed or expanded. The cavity 14 is provided at a higher density in the other portion 102 than in the vicinity portion 101 on the upper surface of the support 10c, and the stretchability of the portion 102 is enhanced.

  When the display device 1c is bent so as to be convex upward, as shown in FIG. 8B, the cavity 14 is crushed and the support 10c is deformed. On the other hand, when the display device 1c is bent so as to protrude downward, the cavity 14 expands and the support 10c is deformed. The size, size, and density of the cavity 14 of the support 10c can be determined as appropriate.

  In either case, since the expansion and contraction of the portion 101 near the upper surface of the support 10c with few cavities 14 is suppressed, the upper surface of the support 10c expands and contracts due to deformation of the flexible display 30 and the like, as in the first embodiment. It is possible to prevent peeling and damage of the flexible display 30 and the like.

  As described above, in the present embodiment, the support 10c is made flexible by a configuration in which the stretchability is different between the upper and lower sides, and the expansion and contraction of the upper surface is suppressed, so that peeling and damage of the flexible display 30 and the like can be suitably prevented. In the present embodiment, the above-described difference in stretchability can be realized by configuring the support 10c with a sponge or the like having a cavity 14 therein and setting the density of the cavity 14 as described above.

  Further, as shown in the display device 1c ′ of FIG. 8C, the vicinity portion 101 and the other portion 102 on the upper surface of the support 10c ′ are separately manufactured, and these are arranged so as to sandwich the sheet 12 and the like. The support 10c ′ may be used. In this case, it is only necessary to separately manufacture the vicinity portion 101 where the cavity 14 has a low density and the other portion 102 where the cavity 14 has a high density, and it is necessary to manufacture the support 10c in which the density of the cavity 14 changes up and down. Compared with the case as shown in FIG. 8A, there is an advantage that it can be easily manufactured. Moreover, it can also be set as the appropriate thickness which considered usability, rigidity, etc. by laminating | stacking these layers.

[Fifth Embodiment]
FIG. 9A is a diagram showing a display device 1d according to the fourth embodiment. This display device 1d is different from the first embodiment in that a plurality of sheets 15 are stacked one above the other to form a support 10d, and a frame body 60 for holding these sheets 15 is provided.

  Each sheet 15 can be formed of a resin, for example, and is thin and flexible like the flexible display 30 and the intermediate sheet 20. In addition, the stretchability is low as in the flexible display 30 and the intermediate sheet 20. An intermediate sheet 20 is fixed to the uppermost sheet 15.

  The frame 60 holds the sheet 15 and protects the sheet 15, and a material having wear resistance and flexibility is used. For example, a thin resin, rubber, cloth or the like can be used.

  FIG. 9B is a diagram showing a state in which the display device 1d is bent so that the top is convex. In the present embodiment, when the display device 1d is bent, each thin sheet 15 is individually bent like a paper bundle, and the flexibility of the support 10d is realized by this bending. Since the sheet 15 itself does not need to expand and contract, the upper surface of the support 10d follows the deformation of the flexible display 30 and the like without expanding and contracting, and the flexible display 30 and the like can be prevented from peeling and damaging, as in the first embodiment. . The same applies to the case where the display device 1d is bent so that the bottom is convex.

  In this embodiment, the sheet 15 having low elasticity is used. However, since the sheet 15 is thin and has excellent bending deformation, the display device can be used even when a material such as urethane having higher elasticity than the flexible display 30 is used. Expansion and contraction at the time of bending 1d can be suppressed, and the same effect is obtained.

  Note that the upper and lower sheets 15 are fixed by bonding or the like in a range 151 along the center line of the plane as shown in FIG. 9C, or near the center portion 152 of the plane as shown in FIG. 9D. And can be fixed by bonding or the like. In the former case, the above effect can be obtained when the sheet is bent along a direction orthogonal to the center line, and the upper and lower sheets 15 can be firmly fixed. On the other hand, in the latter case, the above effect can be obtained regardless of the direction of bending. In addition, it is also possible to fix the upper and lower sheets 15 together by bonding or the like at the corners of a plane.

  Further, as shown in the support 10d ′ of the display device 1d ′ in FIG. 10, a plurality of upper and lower sheets 15 may be connected to both sides of the holding unit 16, and in this case, each sheet 15 is firmly fixed by the holding unit 16. it can.

[Sixth Embodiment]
FIG. 11A is a diagram showing a display device 1e according to the sixth embodiment. This display device 1e is different from the first embodiment in that the side surface and the lower surface of the support 10e have a bellows portion. The support 10e is formed of resin or the like, and the inside thereof is hollow so that the circuit, wiring, and the like of the flexible display 30 can be passed therethrough.

  However, the upper surface of the support 10e is flat, the intermediate sheet 20 is provided on the flat upper surface, and the flexible display 30 is provided thereon.

  When the display device 1e is bent so that the top is convex as shown in FIG. 11B, the bellows portion of the support 10e is folded and the support 10e is deformed. When the display device 1e is bent so that the bottom is convex, the bellows portion is expanded and the support 10e is deformed.

  Thus, in this embodiment, since flexibility is realizable with the structure of the support body 10e which has a bellows part, the raw material of the support body 10e may be a thing with low elasticity. Therefore, as in the first embodiment, the upper surface of the support 10e follows the deformation of the flexible display 30 and the like without expanding and contracting, and the flexible display 30 and the like can be prevented from being peeled off or damaged.

  In the present embodiment, the upper surface of the support 10e is a flat surface. However, the upper surface may be a bellows shape, and the support 10e may be a tube having a bellows shape as a whole. However, if the upper surface of the support 10e is a flat surface, there is an advantage that the support 10e and the flexible display 30 and the like are in close contact and can be strongly fixed.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

1, 1 ′, 1a, 1a ′, 1b, 1c, 1c ′, 1d, 1d ′, 1e; display device 10, 10a, 10b, 10c, 10c ′, 10d, 10d ′, 10e, 110; support 11; Notch 12; sheet 13; hole 14; cavity 15; sheets 16, 40;
20; Intermediate sheet 30; Flexible displays 50 and 60; Frame body 101;

Claims (10)

A display device for performing display by a flexible display having flexibility,
The flexible display is provided on a flexible support,
The display device according to claim 1, wherein the support body follows the deformation of the flexible display when the display device is bent, without the surface on the flexible display side expanding and contracting.   The display device according to claim 1, wherein the support is formed of a stretchable material and has a recess on a surface opposite to the flexible display side.   The display device according to claim 2, wherein a plurality of the recesses are arranged vertically and horizontally on a plane of the support.   The display device according to claim 1, wherein the stretchability of a portion near the surface of the support on the flexible display side is lower than the stretchability of other portions. The support has a cavity inside;
5. The display device according to claim 4, wherein the cavity is provided in a portion other than the vicinity portion at a higher density than in the vicinity portion.   The display device according to claim 1, wherein the support has a bellows portion.   The display device according to claim 6, wherein a surface of the support on the flexible display side is flat.   The display device according to claim 1, wherein the support is formed by stacking a plurality of flexible sheets.   The display device according to claim 1, wherein an intermediate sheet having flexibility is provided between the support and the flexible display.   10. The device according to claim 1, wherein two sets of the flexible display and the support are provided, and ends of the flexible display and the support of each set are held by a holding unit. The display device described in 1.

Images