Display device

Abstract

To provide a display device capable of further suppressing occurrence of a gap on a display surface side of a monitor while eliminating complexity of processing.SOLUTION: A display device comprising a decorative sheet having visible light transmittance, a transparent base material, a resin sheet having visible light transmittance, and a monitor in this order, wherein a hardness of the resin sheet is smaller than a hardness of the transparent base material. A display device comprising a decorative sheet having visible light transmittance, a resin sheet having visible light transmittance, and a monitor in this order, wherein the resin sheet has a hardness of 30 to 90 °.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a display device. [Background technology]

[0002] Conventionally, decorative sheets having patterns such as wood grain patterns and abstract patterns have been known as decorative sheets for walls, etc. Display devices have been known in which the decorative sheet is made visible light transmissive, allowing a monitor or the like to be placed on the back side of the decorative sheet and an image displayed on the monitor to be displayed on the front side of the decorative sheet.

[0003] In conventional display devices, a transparent substrate is placed between the decorative sheet and the monitor, but gaps may occur between the transparent substrate and the display surface of the monitor. However, if a gap occurs between the transparent substrate and the display surface of the monitor, the visibility of the image displayed on the front side of the decorative sheet is reduced, which is undesirable. To solve this problem, the display device of Patent Document 1 has been considered to provide protrusions on the substrate (transparent resin sheet) to suppress the occurrence of gaps and improve visibility. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2023-74192 Summary of the Invention [Problem to be solved by the invention]

[0005] Although providing a convex portion on the transparent substrate can prevent gaps from occurring on the display surface side of the monitor to some extent, the transparent substrate needs to be processed to fit the shape of the monitor, which is cumbersome. Furthermore, if the display surface of the monitor is curved or the shape of the monitor is complex, it is difficult to completely eliminate gaps between the convex portion and the monitor, even if the transparent substrate is provided with a convex portion.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a display device that can further reduce the occurrence of gaps on the display surface side of the monitor while eliminating the need for complicated processing. [Means for solving the problem]

[0007] The present invention includes, for example, the following [1] to [8]. [1] A display device comprising, in this order, a decorative sheet having visible light transparency, a transparent substrate, a resin sheet having visible light transparency, and a monitor; The display device, wherein the resin sheet has a hardness lower than that of the transparent substrate. [2] The display device according to [1], wherein the resin sheet has a hardness of 30 to 90°. [3] The display device according to [1] or [2], wherein the transparent substrate contains an acrylic resin. [4] A display device comprising a decorative sheet having visible light transparency, a resin sheet having visible light transparency, and a monitor in this order; The display device wherein the resin sheet has a hardness of 30 to 90°. [5] The display device according to any one of [1] to [4], wherein the resin sheet contains silicone rubber. [6] The display device according to any one of [1] to [5], wherein the resin sheet has a visible light transmittance of 30 to 98%. [7] The display device according to any one of [1] to [6], wherein the decorative sheet has a pattern layer on which a pattern is printed. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a display device that can further reduce the occurrence of gaps on the display surface side of the monitor while eliminating the need for complicated processing. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view schematically showing a state in which a display device according to a first embodiment is installed on a wall surface. [Figure 2]FIG. 2 is a cross-sectional view schematically showing an example of the configuration of the decorative sheet shown in FIG. [Figure 3] 3(a) and 3(b) are front views showing an example of the state of the surface of the display device shown in FIG. 1, where FIG. 3(a) shows the monitor in an off state and FIG. 3(b) shows the monitor in an on state. [Figure 4] FIG. 4 is a cross-sectional view schematically showing a state in which a display device according to the second embodiment is installed on a wall surface. [Figure 5] FIG. 5(a) is a photograph of the surface of the decorative sheet of Example 1, and FIG. 5(b) is a photograph of the surface of the decorative sheet of Comparative Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the drawings are schematic, and for example, the relationship between thickness and planar dimensions, and the thickness ratio of each layer may differ from the actual ones. Furthermore, the embodiments shown below are merely examples of configurations that embody the technical concept of the present invention, and the technical concept of the present invention is not limited to the materials, shapes, structures, etc. of the components described below.

[0011] (First embodiment) 1 is a cross-sectional view schematically illustrating a state in which a display device 100 according to one embodiment is installed on a wall surface W. The display device 100 includes a decorative sheet 10, a transparent substrate 20, a resin sheet 30, and a monitor 40. The monitor 40 is fixed to the wall surface W by a fixing member 50, for example. The display device 100 also includes a frame 60 that protects the monitor 40.

[0012] (decorative sheet) The decorative sheet 10 is positioned in front of the display surface 41 of the monitor 40. The decorative sheet 10 is transparent to visible light, and displays the image displayed on the display surface 31 on the surface 10S of the decorative sheet 10 opposite the monitor 40.

[0013] The decorative sheet 10 includes, for example, a substrate 11, a concealing layer 12, a design layer 13, and a surface protection layer 14, as shown in FIG.

[0014] The substrate 11 is made of a material that is transparent to visible light, such as acrylic resin, glass, polyethylene terephthalate resin, or polycarbonate resin.

[0015] The concealing layer 12 is a layer that prevents the configuration of the inside (monitor 40 side) of the decorative sheet 10 from being visible through the surface. The color of the surface of the concealing layer 12 on the pattern layer 13 side may be white, from the viewpoint of preventing the pattern of the pattern layer 13 from appearing dark when the monitor 40 is not displaying an image. The concealing layer 12 may be a layer formed on one surface of the decorative sheet 10 (the surface on the monitor 40 side).

[0016] The hiding layer 12 can be formed on the surface of the substrate 11 by, for example, inkjet printing, gravure printing, screen printing, or offset printing. The hiding layer 12 is formed using, for example, a white ink containing titanium oxide.

[0017] The thickness of the concealing layer 12 may be 30 μm or more from the viewpoint of preventing the pattern of the pattern layer 13 from appearing dark when the monitor 40 is not displaying an image. The thickness of the concealing layer 12 may be 50 μm or less from the viewpoint of improving the visibility of the image displayed by the monitor 40.

[0018] The picture layer 13 is a layer provided for the purpose of imparting design to the decorative sheet 10. At least a portion of the picture layer 13 is transparent to visible light, and the image displayed by the monitor 40 can be seen from the outside of the decorative sheet 10 (the side opposite the monitor 40).

[0019] The design layer 13 can be formed on the surface of the substrate 11 (or the concealing layer if the decorative sheet does not have a substrate) by, for example, inkjet printing, gravure printing, screen printing, or offset printing.

[0020] The pattern of the picture layer 13 can be determined depending on the environment where the display device is installed. Examples of the pattern of the picture layer 13 include wood grain patterns, stone patterns, and abstract patterns.

[0021] The thickness of the picture layer 13 may be 30 μm or more from the viewpoint of preventing the picture of the picture layer 13 from appearing dark when the monitor 40 is not displaying an image. The thickness of the picture layer 13 may be 50 μm or less from the viewpoint of improving the visibility of the image displayed by the monitor 40.

[0022] The surface protective layer 14 is a layer that protects the design layer 13 and suppresses deterioration of the design layer 13. The surface protective layer 14 is formed, for example, from a resin that is transparent to visible light. The surface protective layer 14 may be formed from PET, polyvinyl chloride resin, or polypropylene resin, from the viewpoint that the surface protective layer 14 has excellent transparency and excellent heat resistance.

[0023] The thickness of the surface protective layer 14 may be 0.1 μm or more, 10 μm or more, or 30 μm or more, from the viewpoint of providing sufficient strength to the decorative sheet 10. The thickness of the surface protective layer 14 may be 200 μm or less, 100 μm or less, or 70 μm or less, from the viewpoint of preventing the decorative sheet 10 from becoming excessively thick.

[0024] (Transparent base material) 1, the transparent substrate 20 is sandwiched between the decorative sheet 10 and the frame 60, and transmits the image displayed by the monitor 40 to the back side (monitor 40 side) of the decorative sheet 10. The decorative sheet 10 and the transparent substrate 20 may be fixed together via an adhesive or the like that is transparent to visible light.

[0025] The transparent substrate 20 is formed of, for example, a resin such as an acrylic resin, a polycarbonate resin, a polyethylene terephthalate resin, or a polybutylene terephthalate resin; glass; or the like. The transparent substrate 20 may be an acrylic resin from the viewpoints of high visible light transmittance and excellent processability. The transparent substrate 20 may be colored with a pigment or the like.

[0026] From the viewpoints of visibility and ease of application, the thickness of the transparent substrate 20 may be 0.5 mm or more and 5.0 mm or less, or may be 5.0 mm or more.

[0027] (resin sheet) The resin sheet 30 is arranged so that no gap is formed on the display surface 41 side of the monitor 40. The resin sheet 30 is visible light transmissive, and the hardness of the resin sheet 30 is lower than the hardness of the transparent substrate 20. That is, the first embodiment of the present invention is a display device comprising, in this order, a decorative sheet having visible light transmissive properties, a transparent substrate, a resin sheet having visible light transmissive properties, and a monitor, and the hardness of the resin sheet is lower than the hardness of the transparent substrate. In this specification, "hardness" refers to a value measured in accordance with JIS K6253. The transparent substrate 20 and the resin sheet 30 may be fixed via a visible light transmissive adhesive or the like.

[0028] The hardness of the resin sheet 30 is less than the hardness of the transparent substrate 20, which eliminates the need for complex processing and further reduces the occurrence of gaps on the display surface 41 side of the monitor 40. The reason for this is that, since the hardness of the resin sheet 30 is less than the hardness of the transparent substrate 20, the resin sheet 30 deforms to conform to the shape of the monitor 40, making it less likely to cause gaps, compared to conventional cases in which the transparent substrate 20 is in contact with the monitor 40. Furthermore, since the hardness of the resin sheet 30 is relatively low, the resin sheet 30 has elasticity and can deform to conform to the shape of the monitor 40, etc., eliminating the need to precisely process the resin sheet 30 to fit the shape of the monitor 40, etc., thereby eliminating the need for complex processing.

[0029] The resin sheet 30 may be made of, for example, an elastomer. The elastomer may be a thermosetting elastomer or a thermoplastic elastomer. The resin sheet 30 may be made of a thermosetting elastomer from the viewpoint of excellent heat resistance.

[0030] Examples of elastomers include silicone rubber, urethane rubber, fluororubber (Viton), natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber (neoprene), acrylic rubber, chlorosulfonated polyethylene rubber (Hypalon), ethylene-vinyl acetate rubber, epichlorohydrin rubber, and polysulfide rubber (Thiokol). The resin sheet 30 may contain silicone rubber for superior conformability, further suppressing gaps on the display surface 41 side of the monitor 40, and improving processability. The resin sheet 30 may contain silicone rubber for superior heat resistance, suppressing deformation and deterioration caused by heat generation from the monitor 40. The resin sheet 30 may contain silicone rubber for superior adhesion to the display surface 41 of the monitor 40.

[0031] The silicone rubber may be a polymer having a siloxane bond (Si-O-Si). An alkyl group, such as a methyl group, may be bonded to the silicon atom of the silicone rubber. The silicone rubber has excellent conformability, can further prevent gaps from occurring on the display surface 41 side of the monitor 40, and may have a helix structure from the viewpoint of excellent processability.

[0032] The hardness of the resin sheet 30 may be 95° or less, 90° or less, 80° or less, 70° or less, or 60° or less from the viewpoints of excellent shape conformability due to the elasticity of the resin sheet 30, further suppressing the occurrence of gaps on the display surface 41 side of the monitor 40, and of excellent processability, or 10° or more, 20° or more, 30° or more, or 40° or more from the viewpoints of excellent impact resistance and handleability. When the resin sheet 30 is made of a single elastomer, the hardness of the resin sheet 30 can be considered to be the hardness of the elastomer.

[0033] The heat resistance temperature of the resin sheet 30 may be 100°C or higher, 150°C or higher, 200°C or higher, or 250°C or higher, from the viewpoint of excellent heat resistance and suppressing deformation and deterioration caused by heat generation of the monitor 40. When the resin sheet 30 is made of a single elastomer, the heat resistance temperature of the elastomer can be considered to be the heat resistance temperature of the resin sheet 30.

[0034] The visible light transmittance of the resin sheet 30 may be, for example, 30 to 98%, 50 to 98%, or 70 to 98%. The visible light transmittance can be measured using a spectrophotometer (for example, spectrophotometer UV-2100 manufactured by Shimadzu Corporation).

[0035] From the viewpoints of visibility and ease of application, the thickness of the resin sheet 30 may be 0.1 mm or more and 2.0 mm or less. The thickness of the resin sheet 30 may be 3.0 mm or more. The thickness of the resin sheet 30 may be adjusted depending on the thickness of the frame body 60.

[0036] (Monitor) The monitor 40 has a display surface 41 and displays an image. The monitor 40 may be, for example, a liquid crystal display (LCD), a cathode ray tube display (CRT), a plasma display (PDP), an electroluminescence display (ELD), or a field emission display (FED). The display surface 41 of the monitor 40 may be substantially parallel to the wall surface W or may be curved. The display device 100 has a resin sheet 30. Since the resin sheet 30 has a lower hardness than the transparent substrate 20, even if the display surface 41 of the monitor 40 is curved, the resin sheet 30 is arranged to follow the shape of the display surface 41, thereby preventing a gap from being generated on the display surface 41 side of the monitor 40. The resin sheet 30 and the monitor 40 may be fixed via an adhesive or the like that is transparent to visible light.

[0037] An opening is provided on the display surface 41 side of the monitor 40, surrounded by the display surface 41 of the monitor 40 and the frame 60. The size of the opening may be, for example, approximately the same as the size of the display surface 41 of the monitor 40. The size of the opening only needs to be such that all or part of the image light projected from the monitor 40 can pass through, and may be larger or smaller than the display surface 41.

[0038] (fixing member) The fixing member 50 fixes the monitor 40 to the wall surface W. The fixing member 50 is made of a material that can fix the monitor 40, and may be made of, for example, metal, wood, resin, etc. The display device may not include a fixing member, and the monitor may be fixed to the wall surface via an adhesive.

[0039] (Frame) The frame 60 is positioned between the transparent substrate 20 and the monitor 40, and is arranged to protect the outer frame of the monitor 40 and to secure the monitor 40. By providing the frame 60 to the display device 100, it is possible to reduce the load on the display surface 41 of the monitor 40 when a load is applied to the surface of the decorative sheet 10. The frame 60 may be fixed to the wall surface W with a jig (not shown). The transparent substrate 20 and the frame 60 may be fixed via an adhesive or the like. The monitor 40 and the frame 60 may be fixed via an adhesive or the like. The material of the frame 60 is appropriately selected depending on the required strength, and may be made of, for example, metal, wood, resin, etc.

[0040] When the monitor 40 of the display device 100 is displaying an image, the image displayed by the monitor 40 is displayed on the surface of the display device 100. FIG. 3(a) is a front view showing an example of the state of the surface of the display device 100, illustrating a state in which the monitor 40 is not displaying an image. The surface of the display device 100 has, for example, a wood grain pattern with a dark brown base, which blends in with the surrounding wall surface, making the monitor 40 seem invisible. On the other hand, FIG. 3(b) is a front view showing an example of the state of the surface of the display device 100, illustrating a state in which the monitor 40 is displaying an image and the image from the monitor 40 is projected onto the surface of the display device 100 through the screen. For example, as shown in FIG. 3(b), information such as the date, time, and weather forecast is displayed on the surface of the display device 100. The image displayed by the monitor 40 is not limited to characters, symbols, etc., but may also be a photograph, video, etc.

[0041] Second Embodiment In other embodiments, the hardness of the resin sheet 30 may be 30 to 90°. That is, a second embodiment of the present invention is a display device comprising, in this order, a decorative sheet having visible light transparency, a resin sheet having visible light transparency, and a monitor, and the hardness of the resin sheet is 30 to 90°.

[0042] By having the hardness of the resin sheet 30 within a specific range, it is possible to eliminate the complexity of processing and further suppress the occurrence of gaps on the display surface 41 side of the monitor 40. The reason for this is that since the hardness of the resin sheet 30 is relatively low, the resin sheet 30 has elasticity and can deform to follow the shape of the monitor 40, making it less likely for gaps to occur. Furthermore, since the hardness of the resin sheet 30 is relatively low, the resin sheet 30 has elasticity and can deform to follow the shape of the monitor 40, etc., so there is no need to process the resin sheet 30 precisely to match the shape of the monitor 40, etc., and this eliminates the complexity of processing.

[0043] In the second embodiment, the display device may or may not have a transparent substrate. Fig. 4 is a cross-sectional view schematically showing a state in which a display device 200 according to the second embodiment is installed on a wall surface W, and the display device 200 does not have a transparent substrate. The display device 200 includes a decorative sheet 10, a resin sheet 130, and a monitor 40. In Fig. 4, for the symbols common to Fig. 1, the description of the first embodiment described above can be referenced as appropriate.

[0044] (resin sheet) The resin sheet 130 is arranged so that there is no gap on the display surface 41 side of the monitor 40. The resin sheet 130 is visible light transmissive, and the hardness of the resin sheet 130 is 30 to 90°. The decorative sheet 10 and the resin sheet 130 may be fixed via an adhesive or the like that is visible light transmissive. For the configuration of the resin sheet 130, the description of the resin sheet 30 described above can be referred to as appropriate. [Example]

[0045] Examples and comparative examples of the present disclosure will be described below, but the present disclosure is not limited to the following examples.

[0046] Example 1 A display device was fabricated that had a decorative sheet, a transparent substrate, a resin sheet, and a monitor, in this order, on a wall surface, as shown in Figure 1. The decorative sheet was a sheet with a polypropylene resin layer and a wood grain pattern layer, the transparent substrate was an acrylic panel (thickness: 1.0 mm, hardness: over 40°), the resin sheet was a silicone material (thickness: 3.5 mm, hardness: 40°, visible light transmittance: 94%, heat resistance temperature: 200°C), and the monitor was a 49-inch LCD monitor. In the display device of Example 1, the resin sheet and the monitor were in close contact with each other, and there was no gap between them.

[0047] (Comparative Example 1) Except for not providing the silicone material, a display device was fabricated in the same manner as in Example 1. In the display device of Comparative Example 1, a gap of 3 mm existed between the transparent substrate and the monitor.

[0048] [evaluation] For the display devices prepared above in Example 1 and Comparative Example 1, the monitor was turned on and the visibility of the image displayed on the monitor through the decorative sheet was evaluated. In Example 1, the image displayed on the monitor was clearly displayed on the surface of the decorative sheet, and details could be seen. On the other hand, in Comparative Example 1, although the image displayed on the monitor was displayed on the surface of the decorative sheet, details could not be seen. A photograph of the surface of the decorative sheet of Example 1 is shown in Figure 5(a), and a photograph of the surface of the decorative sheet of Comparative Example 1 is shown in Figure 5(b). [Explanation of symbols]

[0049] 10...decorative sheet, 11...substrate, 12...concealing layer, 13...pattern layer, 14...surface protection layer, 20...transparent substrate, 30, 130...resin sheet, 40...monitor, 41...display surface, 50...fixing member, 60...frame, 100, 200...display device

Claims

1. A display device comprising a decorative sheet having visible light transmissibility, a transparent substrate, a resin sheet having visible light transmissibility, and a monitor, in this order; The display device, wherein the resin sheet has a hardness lower than that of the transparent substrate.

2. 2. The display device according to claim 1, wherein the resin sheet has a hardness of 30 to 90 degrees.

3. The display device according to claim 1 , wherein the transparent substrate comprises an acrylic resin.

4. A display device including a decorative sheet having visible light transparency, a resin sheet having visible light transparency, and a monitor, in this order; The display device, wherein the resin sheet has a hardness of 30 to 90°.

5. 5. The display device according to claim 1, wherein the resin sheet contains silicone rubber.

6. 5. The display device according to claim 1, wherein the resin sheet has a visible light transmittance of 30 to 98%.

7. The display device according to any one of claims 1 to 4, wherein the decorative sheet has a pattern layer on which a pattern is printed.

Images