JP2016018198A - Display device - Google Patents

Abstract

An object of the present invention is to secure the strength of a portion to be bent while maintaining a planar shape in a display device. A display device (1) has a flexible display panel (2) that can be bent and a support (4) that is superimposed so as to be in contact with the flexible display panel (2). has a planar shape extending in the vertical and horizontal directions, a plurality of first regions 7 extending in the vertical direction and positioned horizontally adjacent to each other at intervals, and a plurality of first regions 7 positioned between the adjacent first regions The support 4 includes a plurality of first supports 4a facing the plurality of first regions 7 and a second support 4b facing the second regions 9. , the plurality of first supports 4a have a rigidity that suppresses the bending of the plurality of first regions 7, and the second support 4b deforms while resisting the bending of the second regions 9, thereby preventing the bending. It has the flexibility to prevent localized concentration. [Selection drawing] Fig. 1

Description

  The present invention relates to a display device.

  An organic electroluminescence display panel is attracting attention as a display panel that can be bent because it can be formed very thin. Patent Documents 1 and 2 disclose the basic structure of an organic electroluminescence display panel.

Patent No. 5127103 JP 2010-48887 A JP 2007-108611 A

  Since an arbitrary part of the sheet-like display panel is deformed, it is difficult to maintain the shape of the display surface, and it is difficult to ensure the strength of the part to be bent. Alternatively, as disclosed in Patent Document 3, the method of joining a plurality of displays can be folded, but the width of the frame becomes an obstacle at the joints of the displays, and the visibility when displaying a continuous image is deteriorated. There was a problem.

  It is an object of the present invention to ensure the strength of a portion where a flat shape is held and bent in a display device.

  (1) A display device according to the present invention includes a flexible display panel that can be bent, and a support layer that is stacked so as to contact the flexible display panel. The flexible display panel includes: A plurality of first regions having a planar shape extending in the vertical direction and the horizontal direction, extending in the vertical direction and spaced apart from each other in the horizontal direction, and the adjacent first regions. A second region that is positioned, and the support includes a plurality of first supports that respectively oppose the plurality of first regions, and a second support that opposes the second region, The plurality of first supports have rigidity that suppresses the bending of the plurality of first regions, and the second support is deformed while resisting the bending of the second regions, whereby the bending is locally performed. Have the flexibility to prevent excessive concentration And features. According to the present invention, since each of the plurality of first supports has a rigidity that suppresses bending, it is possible to secure the planar shape of the flexible display panel. Moreover, since the second support body has flexibility to prevent local concentration of bending by being deformed while resisting bending, the strength of the bent portion can be ensured.

  (2) In the display device described in (1), the first support may be a metal or a fiber reinforced plastic.

  (3) In the display device described in (1) or (2), the second support may be an elastic body or a shape memory material.

  (4) In the display device described in any one of (1) to (3), the first support may be bonded to the flexible display panel.

  (5) In the display device described in any one of (1) to (4), a soaking layer for soaking heat is provided between the first support and the flexible display panel. May be a feature.

  (6) In the display device described in (1), the support is a plate of an ultraviolet curable resin, and the plurality of first supports that are portions irradiated with ultraviolet rays and the ultraviolet rays are not irradiated. And the second support as a part.

1 is a perspective view of a display device according to an embodiment of the present invention. It is sectional drawing in the II-II line of a display apparatus. It is a figure which shows a mode that a display apparatus is bent. It is a perspective view which shows the modification of a display apparatus. It is a figure which shows a mode that the display apparatus shown in FIG. 4 is bent. It is a figure for demonstrating the modification of a display apparatus. It is a figure for demonstrating the modification of a display apparatus.

  Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive of appropriate modifications while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, the drawings may be schematically represented with respect to the width, thickness, shape, and the like of each part in comparison with actual aspects for the sake of clarity of explanation, but are merely examples, and the interpretation of the present invention is not limited. It is not limited.

  FIG. 1 is a perspective view of a display device 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the display device 1 taken along line II-II. As shown in FIG. 1, the display device 1 includes a flexible display panel 2 that displays an image. As shown in the figure, the flexible display panel 2 is a sheet display panel, and has a planar shape that extends in the X-axis direction (hereinafter referred to as the horizontal direction) and the Y-axis direction (hereinafter referred to as the vertical direction). Here, it has a rectangular surface shape) and has flexibility that can be bent. Specifically, as shown in FIG. 2, the flexible display panel 2 includes a flexible substrate 6, a TFT layer 8 in which a plurality of thin film transistors are formed in an array, and an organic light emitting element that emits organic electroluminescence in an array. It has a laminated structure in which the OLED layer 10 and the sealing substrate 12 are laminated. Here, the display device 1 is an organic electroluminescence display device, but may be another type of display device (for example, a quantum dot display device).

  Moreover, the display apparatus 1 is provided with the support body 4, as shown in FIG. The support 4 supports the flexible display panel 2. Specifically, as shown in FIGS. 1 and 2, the support 4 is stacked so as to be in contact with the flexible display panel 2, and a plurality of (here, two) firsts are provided at intervals in the lateral direction. It has a support 4a. Moreover, the support body 4 has the 2nd support body 4b provided between the adjacent 1st support bodies 4a. The second support 4b is bonded to the first support 4b, and a part thereof is provided so as to cover a part of the lower surface of the first support 4a. In addition, the broken line shown in FIG. 1 shows the boundary of each 1st support body 4a and the 2nd support body 4b. The boundary extends in the vertical direction.

  Each of the first supports 4a is opposed to a first region 7 that is a partial region of the lower surface of the flexible display panel 2 and extends in the vertical direction. For example, the first support body 4a on the right side shown in FIG. 1 faces the first area 7 on the right side of the broken line on the right side, and the first support body 4a on the left side faces the first area 7 on the left side of the broken line on the left side. doing. As shown in FIG. 1, the first regions 7 are located at intervals in the horizontal direction. Each first support 4a is bonded to the flexible display panel 2 via an adhesive layer 14, as shown in FIG. The adhesive layer 14 also has a role as a soaking layer that soaks the heat.

  As shown in FIG. 2, each first support 4 a has a wall portion 5 that constitutes a side wall of the display device 1, and a buffer material 11 is provided between the wall portion 5 and the flexible display panel 2. Is filled.

  On the other hand, the second support 4 b faces the second region 9 located between the adjacent first regions 7. Here, the second support 4 b is not bonded to the flexible display panel 2.

  Next, the substance which comprises the 1st support body 4a and the 2nd support body 4b is demonstrated.

  The first support 4a is made of a material having a high Young's modulus (for example, 10 gigapascal or more) (for example, a metal, or a fiber reinforced plastic such as a glass fiber reinforced plastic and a carbon fiber reinforced plastic). It has the rigidity which suppresses the curvature of 1 area | region 7. Therefore, the first region 7 is not bent and the first region 7 is kept flat with human power. It is more preferable that the coefficient of linear expansion (10 ppm / ° C. or less), the high thermal conductivity (10 W / m, k or more), and the weight are low.

  On the other hand, the second support 4b is formed by applying the material constituting the second support 4b to the second region 9 after placing the flexible display panel 2 on each first support 4a. As shown in FIG. 3, the display device 1 is assumed to be carried around in a state where the second region 9 is folded and folded. Therefore, a material that is soft enough to be deformed by human force is used as the second support 4b. By doing so, the vicinity of the second region 9 can be bent.

  However, if the bending of the second region 9 is locally concentrated and the bending state (curvature) becomes too large, the deformation of the flexible display panel 2 is locally concentrated, and the flexible display panel 2 may be damaged. There is sex. Therefore, in the display device 1, as the second support 4b, a material having flexibility enough to be deformed while resisting bending of the second region 9 (for example, an elastic body such as rubber, a shape of silicone (gel), etc.) Memory materials, hydrogenated styrene thermoplastic elastomers, etc.) are used. For this reason, the bending of the second region 9 is prevented from being concentrated locally, and the second region 9 is bent uniformly. Therefore, it is possible to prevent the deformation of the flexible display panel 2 from being concentrated locally. The second support 4b preferably has a low Young's modulus (for example, 0.5 gigapascal or less).

  As described above, in the display device 1, each of the plurality of first support bodies 4 a has rigidity to suppress bending. Therefore, it is possible to secure the planar shape of the flexible display panel 2. Moreover, since the 2nd support body 4b has a softness | flexibility of a grade which resists bending and deform | transforms, local concentration of a bending is prevented. Therefore, the strength of the part to be bent can be secured.

  In addition, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible.

  For example, the second support 4b may be formed by a method other than coating. For example, the second support 4b may be attached to the second region 9 as a tape-like adhesive member.

  Further, for example, in FIG. 1, there are only two first support bodies 4a, but there may be three or more first support bodies 4a. FIG. 4 is a view showing a modification of the display device 1, and is a perspective view showing the display device 1 having three or more first support bodies 4a. FIG. 5 is a diagram illustrating a state in which the display device 1 illustrated in FIG. 4 is bent. In the display device 1 illustrated in FIG. 4, the support body 4 includes five first support bodies 4 a and four second support bodies 4 b provided between adjacent first support bodies 4 a. As shown in FIG. 5, it can be bent at four locations. Therefore, when folded, it can be made more compact than the display device 1 shown in FIG.

  For example, the 1st support body 4a and the 2nd support body 4b may be formed integrally. For example, the first support 4a and the second support 4b may be formed from a single sheet of UV curable resin. 6 and 7 are diagrams for explaining a modification of the display device 1 and are diagrams showing the display device 1 when the support 4 is a UV curable resin plate. In this case, in order to form the first support 4a and the second support 4b on the support 4, the flexible display panel 2 is provided on the support 4 as shown in FIG. The corresponding region is masked by the mask 13 and the support 4 is irradiated with ultraviolet rays. By doing so, as shown in FIG. 7, a portion irradiated with ultraviolet rays and cured (unmasked portion) is formed as the first support 4a, and a portion not irradiated with ultraviolet rays (masked portion) is formed. What is necessary is just to form as the 2nd support body 4b.

  Further, for example, the configuration described in the embodiment can be replaced with a configuration that can achieve substantially the same configuration, the configuration that achieves the same operational effects, or the same purpose.

  DESCRIPTION OF SYMBOLS 1 Display apparatus, 2 Flexible display panel, 4 Support body, 4a 1st support body, 4b 2nd support body, 5 Wall part, 6 Flexible substrate, 7 1st area | region, 8 TFT layer, 9 2nd area | region, 10 OLED layer , 11 Buffer agent, 12 Sealing substrate, 13 Mask, 14 Soaking layer.

Claims (6)

A flexible display panel having flexibility that can be bent;
A support layered to contact the flexible display panel;
Have
The flexible display panel has a planar shape extending in a vertical direction and a horizontal direction, extends in the vertical direction, and has a plurality of first regions positioned adjacent to each other in the horizontal direction, and the adjacent firsts. A second region located between one region,
The support includes a plurality of first supports that respectively face the plurality of first regions, and a second support that faces the second regions,
The plurality of first supports have rigidity to suppress bending of the plurality of first regions,
The display device according to claim 1, wherein the second support body has flexibility to prevent local concentration of the bending by being deformed while resisting the bending of the second region. The first support is metal or fiber reinforced plastic;
The display device according to claim 1. The second support is an elastic body or a shape memory material;
The display device according to claim 1 or 2. The first support is bonded to the flexible display panel;
The display device according to claim 1, wherein: A soaking layer for soaking heat is provided between the first support and the flexible display panel;
The display device according to claim 1, wherein: The support is a plate of an ultraviolet curable resin, and includes a plurality of the first support that is a portion irradiated with ultraviolet rays, and the second support that is a portion that is not irradiated with ultraviolet rays.
The display device according to claim 1.

Images