Input device, moving body, furniture, household electrical appliance, and decorative member

Abstract

To provide an input device, a mobile body, furniture, an electrical appliance and a decorative member, capable of maintaining an excellent design property through preventing a fingerprint or an adhesion of stain from drastically deteriorating a design property of a decorative sheet when the decorative sheet or a transparent layer laminated with the decorative sheet is used as an input face at an input device.SOLUTION: An input device 20 includes: a light source 60; a hologram element 50 configured to generate an image by light beams from the light source 60; a decorative sheet 40 superposed onto the hologram element 50; and a sensor 65 configured to detect an action of a user 100. The image is generated at a location at least partially removed from both of the hologram element 50 and the decorative sheet 40.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an input device, a moving body, furniture, an electric appliance, and a decorative member.

Background Art

[0002] As disclosed in Patent Document 1, a decorative sheet used for decoration is known. The decorative sheet disclosed in Patent Document 1 is disposed so as to overlap a display device. This decorative sheet allows image light emitted from the display device to pass through and enables the image to be observed through transmission. Further, the decorative sheet functions as an input device in combination with a touch panel.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a decorative sheet or a transparent layer overlaid on the decorative sheet is used as an input surface in an input device, the design property of the decorative sheet is significantly deteriorated due to the adhesion of fingerprints, dirt, etc. The present disclosure has been made in consideration of such points, and an object thereof is to provide an input device that can maintain excellent design property.

Means for Solving the Problems

[0005] An input device according to an embodiment of the present disclosure includes a light source, a hologram element that generates an image by light from the light source, a decorative sheet overlaid on the hologram element, and a sensor that detects an operation of a user, and the image is generated at a position at least partially separated from both the hologram element and the decorative sheet.

[0006] In an input device according to an embodiment of the present disclosure, the image may indicate an input switch, and the sensor may detect an operation of the user with respect to the input switch.

[0007] In an input device according to an embodiment of the present disclosure, the image may indicate a surface located away from the decorative sheet, and the sensor may detect an operation of the user with respect to the surface.

[0008] In an input device according to an embodiment of the present disclosure, the hologram element may be located between the image and the decorative sheet.

[0009] In an input device according to an embodiment of the present disclosure, the decorative sheet may be located between the image and the hologram element.

[0010] An input device according to an embodiment of the present disclosure may further include a display device having a display surface for displaying an image, and the hologram element and the decorative sheet may be superimposed on the display surface.

[0011] In an input device according to an embodiment of the present disclosure, the decorative sheet may be located between the display surface and the hologram element.

[0012] In an input device according to an embodiment of the present disclosure, the hologram element may be located between the display surface and the decorative sheet.

[0013] In an input device according to an embodiment of the present disclosure, the light source may include a first light source that irradiates the hologram element with light, and a second light source that irradiates the hologram element with light from a direction non-parallel to the first light source. The hologram element may generate a first image with the light from the first light source and generate a second image different from the first image with the light from the second light source.

[0014] In the input device according to an embodiment of the present disclosure, the hologram element may include a volume hologram.

[0015] In the input device according to an embodiment of the present disclosure, the visible light transmittance of the hologram element may be 50% or more.

[0016] A moving body according to an embodiment of the present disclosure includes any one of the input devices according to an embodiment of the present disclosure described above.

[0017] Furniture according to an embodiment of the present disclosure includes any one of the input devices according to an embodiment of the present disclosure described above.

[0018] An electrical appliance according to an embodiment of the present disclosure includes any one of the input devices according to an embodiment of the present disclosure described above.

[0019] A decorative member according to an embodiment of the present disclosure a hologram element that generates an image, and a decorative sheet overlapped with the hologram element, and the image is generated at a position at least partially separated from both the hologram element and the decorative sheet. The image is generated at a position at least partially separated from both the hologram element and the decorative sheet.

[0020] In the decorative member according to an embodiment of the present disclosure, the hologram element may be located between the image and the decorative sheet.

[0021] In the decorative member according to an embodiment of the present disclosure, the decorative sheet may be located between the image and the hologram element.

Advantages of the Invention

[0022] According to the present invention, the design property of the input device can be maintained.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3A

Figure 3B

Figure 3C

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12A

Figure 12B

Figure 12C

Figure 12D

Figure 13

Figure 14

Figure 15A

Figure 15B

Figure 16

Figure 17

Figure 18

DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the drawings attached to this specification, for the convenience of illustration and easy understanding, the scale, aspect ratio, etc. are appropriately changed and exaggerated from those of the actual objects. Also, the configurations shown in some of the drawings may be omitted in other drawings.

[0025] In this specification, terms specifying shapes, geometric conditions, and their degrees, such as terms like "parallel", "orthogonal", "identical", etc., and values of lengths and angles, are not limited to strict meanings, but are interpreted to include ranges that can be expected to have similar functions.

[0026] In this specification, terms such as "sheet", "film", and "plate" are not distinguished from each other based only on the difference in name. For example, a "decorative sheet" can only be distinguished from a member called a "decorative film" or a "decorative plate" based only on the difference in name.

[0027] Also, in this specification, the normal direction of a sheet-like (sheet-like, plate-like) member refers to the normal direction to the sheet surface of the target sheet-like (film-like, plate-like) member. Also, the "sheet surface (film surface, plate surface)" refers to the surface that coincides with the plane direction of the target sheet-like (film-like, plate-like) member when the target sheet-like (film-like, plate-like) member is viewed as a whole and globally.

[0028] To clarify the relationship of directions between drawings, in some drawings, the first direction D1, the second direction D2, and the third direction D3 are shown as common directions by arrows with common reference numerals. The tip side of the arrow is one side of each direction. An arrow pointing forward from the paper surface along the direction perpendicular to the paper surface of the drawing is shown by a symbol with a dot in a circle, as shown in FIG. 2 for example.

[0029] FIGS. 1 to 18 are diagrams for explaining an embodiment. FIG. 1 is a perspective view schematically showing an example of the input device 20. FIG. 2 is a side view showing the input device 20 of FIG. 1. The display device 25 includes a decorative member 30, a light source 60, and a sensor 65. The decorative member 30 includes a decorative sheet 40 and a hologram element 50. The decorative sheet 40 and the hologram element 50 are stacked in the third direction D3. The decorative sheet 40 displays a design. The hologram element 50 generates an image 55 related to the input operation of the user 100 by the light from the light source 60. The input device 20 receives an input from the user 100 by the sensor 65 detecting the operation of the user 100 with respect to the image 55.

[0030] In this embodiment, a device is provided to maintain the design of the input device 20. More specifically, the image 55 is generated at a position at least partially separated from the decorative member 30. The sensor 65 detects an operation performed away from the decorative member 30. That is, the input operation of the user 100 is performed away from the decorative member 30 while being guided by the image 55 generated by the hologram element 50. Thereby, it is possible to suppress fingerprints and dirt from adhering to the decorative member 30 and maintain the design of the input device 20.

[0031] Hereinafter, an embodiment will be described with reference to the illustrated specific examples.

[0032] The input device 20 can be applied to various uses. The input device 20 can be applied to the interior of the moving body 10 as a movable device. The moving body 10 is a movable device. The moving body 10 may be movable with a person on board. Examples of the moving body 10 include an automobile 11, a ship, an airplane, and the like. In one specific example shown in FIG. 3A, the input device 20 is applied to the center console of the automobile 11. The input device 20 can also be applied to the door console, dashboard, pillar, etc. of the automobile 11. The input device 20 can also be applied to walls, doors, ceilings, etc. as interior materials of a building. Further, the input device 20 can be applied to various devices such as furniture 12 and electrical appliances 13 such as home appliances. In the example shown in FIG. 3B, the input device 20 is applied to a desk as the furniture 12. In the example shown in FIG. 3C, the input device 20 is applied to a refrigerator as the electrical appliance 13.

[0033] The input device 20 shown in FIGS. 1 and 2 has a display device 25 in addition to the above-described decorative member 30, light source 60, and sensor 65. The display device 25 emits image light for forming an image. The display device 25 displays an image on the display surface 25a by emitting the image light. The display displayed on the display surface 25a may be related to the input of the user 100. In the example shown in FIG. 1, the decorative member 30 is disposed facing the display surface 25a.

[0034] The display device 25 and the decorative member 30 are overlapped in the third direction D3. The third direction D3 is the direction in which the decorative sheet 40 and the hologram element 50 are overlapped. In the illustrated example, the third direction D3 is parallel to the normal direction of the display surface 25a, the normal direction of the decorative member 30, the normal direction of the decorative sheet 40, and the normal direction of the hologram element 50. The display surface 25a extends in the first direction D1 and the second direction D2. The first direction D1, the second direction D2, and the third direction D3 are orthogonal to each other.

[0035] The display device 25 may adopt a dot matrix system. The display device 25 of the dot matrix system has a plurality of pixels forming each dot. This display device 25 forms a desired image on the display surface 25a by controlling the light emission state for each pixel. Examples of the display device 25 include a liquid crystal display device and an electroluminescence display device also called an EL display device.

[0036] The display device 25 may include an optical sheet and a light source that illuminates the optical sheet from the back. The optical sheet may include a transparent film and a printed layer having visible light transmissibility printed on the transparent film. As another example, the optical sheet may be a light shielding plate provided with openings or transmissive portions. The light source may be a surface light source device that emits light in a planar shape. According to such a display device, displays corresponding to the optical sheet, such as pictograms and marks, can be displayed.

[0037] The decorative member 30 has a decorative sheet 40 and a hologram element 50 overlapped in the third direction D3. The decorative sheet 40 forms a design to be displayed by the decorative member 30. The decorative sheet 40 is in a sheet shape. The decorative sheet 40 extends in the first direction D1 and the second direction D2. The hologram element 50 is in a sheet shape. The hologram element 50 extends in the first direction D1 and the second direction D2. In the examples shown in FIGS. 1 and 2, the decorative sheet 40 is located between the hologram element 50 and the display device 25 in the third direction D3.

[0038] The visible light transmittance of the decorative member 30 may be 50% or less, may be 45% or less, or may be 40% or less. By setting an upper limit on the total light transmittance of the decorative member 30, it is possible to achieve a rich design expression of the decorative member 30, and in particular, a dark black design can be displayed. In the illustrated example, the display device 25 can be concealed by the decorative member 30.

[0039] The decorative member 30 used in combination with the display device 25 transmits the image light emitted from the display surface 25a. The user 100 can observe the image displayed on the display surface 25a through the decorative member 30. The visible light transmittance of the decorative member 30 may be 10% or more, may be 15% or more, or may be 20% or more. By setting a lower limit on the visible light transmittance of the decorative member 30, the visibility of the image displayed by the display device 25 can be sufficiently ensured. The range of the visible light transmittance of the decorative member 30 can be set by arbitrarily combining any one of the upper limit values of the visible light transmittance and any one of the lower limit values of the visible light transmittance.

[0040] For convenience of understanding, in FIG. 1, the gap between the decorative member 30 and the display device 25 in the third direction D3 is shown enlarged. The gap between the decorative member 30 and the display device 25 in the third direction D3 may be small or may be non-existent. The decorative member 30 may be joined to the display device 25 via an adhesive layer or the like.

[0041] The illustrated decorative member 30 is shown in a flat plate shape. However, the decorative member 30 may be bent by curvature or bending. For example, the decorative sheet 40 and the hologram element 50 may be bent. In this example, at least the display surface 25a of the display device 25 may be bent together with the decorative sheet 40 and the hologram element 50.

[0042] As used in this specification, "transparent" and "visible light transmittance" mean that the visible light transmittance is 50% or more, preferably 80% or more. The visible light transmittance is specified as the average value of the total light transmittance at each wavelength when measured every 1 nm within the range of a measurement wavelength of 380 nm or more and 780 nm or less using a spectrophotometer ("UV-3100PC" manufactured by Shimadzu Corporation, a product compliant with JIS K 0115).

[0043] The decorative sheet 40 displays a design. The decorative sheet 40 imparts design properties to the input device 20. The visible light transmittance of the decorative sheet 40 may be adjusted so as to achieve the visible light transmittance of the above-described decorative member 30. The visible light transmittance of the decorative sheet 40 may be 50% or less, may be 45% or less, or may be 40% or less. The visible light transmittance of the decorative sheet 40 may be 10% or more, may be 15% or more, or may be 20% or more. The range of the visible light transmittance of the decorative sheet 40 can be set by arbitrarily combining any of the upper limit values of the visible light transmittance and any of the lower limit values of the visible light transmittance.

[0044] As shown in FIGS. 4 to 6, the decorative sheet 40 has a decorative layer 44 that displays a design. The design expressed by the decorative member 30 is formed in the decorative layer 44. The decorative sheet 40 is overlaid on the display device 25 so that the decorative layer 44 covers the display surface 25a in observation from the third direction D3. When the display device 25 is in a non-display state, the decorative sheet 40 conceals the display device 25 and displays a design.

[0045] The decorative layer 44 may be provided with patterns such as figures, patterns, designs, colors, pictures, photographs, characters, marks, pictograms, letters, and numbers as designs. The decorative layer 44 may perform a design expression for displaying a background. For example, as a design that can harmonize the peripheral environment where the input device 20 is provided with the decorative sheet, a wood grain pattern, a leather (leather texture) pattern, a stone texture pattern on the surface of a stone such as marble, granite, and sandstone, a sand texture pattern, a tile sticker pattern, a brick stack pattern, a cloth pattern, a geometric pattern, etc. may be displayed by the decorative layer 44. The decorative layer 44 may be formed by printing. The decorative layer 44 may also be formed by transfer.

[0046] As shown in FIGS. 4 and 5, the decorative sheet 40 may further include a base material 42 laminated with the decorative layer 44. The base material 42 supports the decorative layer 44. The base material 42 is in a sheet shape. As the base material 42, a resin film can be used. Examples of the material of the base material 42 include acrylic resins such as polymethyl methacrylate, polyethylene terephthalate, vinyl chloride, ABS (acrylonitrile butadiene styrene copolymer), polycarbonate, polyethylene naphthalate, polystyrene, cyclic polyolefin, etc. The thickness of the base material 42 along the third direction D3 may be 20 μm or more and 250 μm or less.

[0047] The decorative sheet 40 may further include a functional layer (not shown) that covers the decorative layer 44. The functional layer can be expected to have various functions. Examples of the various functions include a hard coat function, an antireflection function, an antiglare function, an antistatic function, an antifouling function, etc. The functional layer may be the outermost surface layer of the decorative sheet 40. The functional layer as the outermost surface layer may be a hard coat layer having scratch resistance, etc.

[0048] FIG. 4 shows an example of the decorative sheet 40. The illustrated decorative sheet 40 shown in FIG. 4 has a base material 42 and a decorative layer 44. The decorative layer 44 includes a first design layer 47A and a second design layer 47B. The second design layer 47B is located between the first design layer 47A and the user 100 who is an observer of the decorative member 30.

[0049] The first design layer 47A may be a dark color such as black or dark brown. The L of the design displayed by the decorative sheet 40 * a * b * L in the color space * The value of may be 30 or less, and further, the color of the first design layer 47A may be adjusted so that the value of L * is 10 or less. The L of the design displayed by the decorative sheet 40 * a * b * a in the color space * The value of may be adjusted so that it is -1 or more and 1 or less. The L of the design displayed by the decorative sheet 40 * a * b * b in the color space * The value of may be adjusted so that it is -1 or more and 1 or less.

[0050] The L of the design displayed by the decorative sheet 40 * a * b * L in the color space * The value, a * The value and b * The value of are specified as follows. First, an evaluation sample is prepared by bonding a black sheet to the surface of the decorative sheet 40 on the side opposite to the surface facing the user 100 in the third direction D3. Light is irradiated onto the evaluation sample from the surface of the decorative sheet 40 facing the user 100 in the third direction D3, and the reflected light from the evaluation sample is measured to determine the value of L * The value, a * The value and b * The value of. L * The value, a * The value and b * For the determination of the value of, a spectrophotometer (Konica Minolta's "CM-700d") is used. The values determined by this spectrophotometer are the value of L * The value, a * The value and b *Let it be the value. The black sheet was specified using a spectrophotometer (Konica Minolta's "CM-700d") in the same manner as the evaluation sample, and the L * a * b * brightness L in the color system * having a value of 30 is used.

[0051] The first design layer 47A has a coloring material. As the coloring material, various coloring materials such as pigments and dyes may be used. The first design layer 47A may contain a cyan pigment, a magenta pigment, and a yellow pigment and display a black design. The first design layer 47A may contain a carbon block which is a black pigment and a cyan pigment and display a black design.

[0052] Examples of the base material in which the coloring material of the first design layer 47A is dispersed include acrylic resins such as polymethyl methacrylate, polyurethane resins, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinyl acetate-acrylic copolymers, chlorinated polypropylene resins, polyester resins, polyamide resins, butyral resins, polystyrene resins, nitrocellulose resins, cellulose acetate resins, and the like. These materials may be used alone or in combination of two or more. The first design layer 47A can be formed by printing a resin composition containing a base material and a coloring material. The thickness of the first design layer 47A along the third direction D3 may be 1 μm or more and 10 μm or less.

[0053] The first design layer 47A produced as a printing layer may perform a design expression for displaying a background. For example, the design that can harmonize the peripheral environment where the input device 20 is provided with the decorative sheet is as described above. As an example, a wood grain pattern, a stone grain pattern, a texture, and a geometric pattern may be expressed by the first design layer 47A by a black shading pattern or the like.

[0054] The first design layer 47A may function as a base material. The first design layer 47A may be constituted by a resin sheet in which a coloring material is kneaded. In this example, the base material 42 may be omitted from the decorative sheet 40. The thickness of the first design layer 47A along the third direction D3 in this example may be 20 μm or more and 250 μm or less.

[0055] The second design layer 47B is disposed on the observer side of the first design layer 47A. As described above, a color tone such as black can be expressed by the first design layer 47A. The second design layer 47B used in combination with the first design layer 47A can display patterns such as figures, patterns, designs, pictures, characters, marks, pictograms, letters, and numbers. Similar to the first design layer 47A, the second design layer 47B includes a base material and a coloring material. Various pigments and dyes may be used as the coloring material. The second design layer 47B can be formed on the first design layer 47A by transfer, printing, or the like. The thickness of the first design layer 47A along the third direction D3 may be 0.5 μm or more and 10 μm or less. The second design layer 47B may be omitted from the decorative sheet 40.

[0056] FIGS. 5 and 6 disclose other examples of the decorative sheet 40. The decorative sheet 40 shown in FIGS. 5 and 6 has a base material 42 and a decorative layer 44. The decorative layer 44 includes a design layer 47 and a light-shielding layer 49. The design layer 47 may be configured in the same manner as the first design layer 47A and the second design layer 47B described above.

[0057] The light-shielding layer 49 is disposed on the back side of the design layer 47. The back side is the side opposite to the observer side in the third direction D3. The light-shielding layer 49 covers the design layer 47 from the display device 25. The light-shielding layer 49 may have a function of absorbing light so that the image light from the display device 25 does not enter the design layer 47. The light-shielding layer 49 may include a base material and light-absorbing particles. Examples of the light-absorbing particles include black pigments such as carbon black and titanium black.

[0058] Examples of the material of the base material of the light-shielding layer 49 include acrylic resins such as polymethyl methacrylate, polyurethane resins, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinyl acetate-acrylic copolymers, chlorinated polypropylene resins, polyester resins, polyamide resins, butyral resins, polystyrene resins, nitrocellulose resins, cellulose acetate resins, and the like. These materials may be used alone or in combination of two or more. The thickness of the light-shielding layer 49 is, for example, 1 μm or more and 20 μm or less.

[0059] In the examples shown in FIGS. 5 and 6, an opening 45 is formed in the decorative layer 44. The image light from the display device 25 passes through the opening 45 and then passes through the decorative sheet 40. When the image light is incident on the light-shielding layer 49, it can be absorbed. Thereby, the color change of the image displayed by the display device 25 can be suppressed. In addition, the design formed by the design layer 47 can be displayed clearly and vividly.

[0060] In the examples shown in FIGS. 5 and 6, the decorative layer 44 includes a decorative portion 44A that forms a design and a transmissive portion 44B that is a non-formed portion of the decorative portion 44A. The decorative portion 44A is formed by a region in the decorative layer 44 where the opening 45 is not provided. The transmissive portion 44B is formed by a region in the decorative layer 44 where the opening 45 is provided. The decorative portion 44A is a portion where the decorative layer 44 is formed. The transmissive portion 44B is a portion through which the image light from the display device 25 in the decorative sheet 40 passes. The transmissive portion 44B has visible light transmissivity.

[0061] FIG. 6 is a partial plan view showing the decorative sheet 40 of FIG. 5. As shown in FIG. 6, the decorative sheet 40 in plan view can be divided into a decorative portion 44A and a transmissive portion 44B. In the illustrated example, the position, shape, and area of the opening 45 determine the position, shape, and area of the transmissive portion 44B, respectively. The shape of the opening 45 in plan view is not particularly limited. For example, as the shape of the opening 45 in plan view, a shape including a curved contour such as a linear shape, a circular shape, an elliptical shape, a polygonal shape such as a triangular shape, a quadrangular shape, a pentagonal shape, a hexagonal shape, an octagonal shape, or a shape with chamfered corners of a polygonal shape can be exemplified. However, in order to ensure the isotropy of the optical properties, the shape of the hole in plan view is preferably circular. In the example shown in FIG. 6, the shape of the opening 45 in plan view is a circle.

[0062] The ratio of the area occupied by the opening 45 to the area of the decorative layer 44 in plan view is defined as the aperture ratio of the decorative layer 44. The area of each opening 45 is the area of the portion that penetrates the decorative layer 44 in the projection in the third direction D3. That is, the area of the region that penetrates the decorative layer 44 over the entire thickness in the third direction D3 and through which the light traveling in the third direction D3 can pass through the decorative layer 44 without entering the decorative portion 44A is defined as the area of each opening 45. The upper limit value of the aperture ratio of the decorative layer 44 is preferably determined so that the design of the decorative layer 44 can be clearly observed when the display device 25 is not displaying an image. The aperture ratio of the decorative layer 44 may be 50% or less, 40% or less, or 30% or less. The lower limit value of the aperture ratio of the decorative layer 44 is preferably determined so that the image can be clearly observed when the display device 25 is displaying an image. The aperture ratio of the decorative layer 44 is preferably 3% or more, 5% or more, or 10% or more. Any combination of the upper limit value of the aperture ratio and the lower limit value of the aperture ratio can be used to set the range of the aperture ratio of the decorative layer 44.

[0063] The opening 45 of the decorative sheet 40 shown in FIGS. 5 and 6 can be formed by irradiation with laser light or patterning using photolithography technology.

[0064] The hologram element 50 generates an image 55 by the light from the light source 60. The image 55 guides or assists the user 100's input operation with respect to the input device 20. In the examples shown in FIGS. 1 and 2, the hologram element 50 is located on the observer side of the decorative sheet 40. The visible light transmittance of the hologram element 50 may be 50% or more and 90% or less. The visible light transmittance of the hologram element 50 is more preferably 80% or more. By providing a lower limit to the visible light transmittance of the hologram element 50, the design displayed by the decorative sheet 40 can be clearly observed through the hologram element 50. Thereby, the design property of the input device 20 can be improved.

[0065] In the present embodiment, the hologram element 50 generates the image 55 at a position at least partially separated from both the hologram element 50 and the decorative sheet 40. The image 55 is at least partially separated from the decorative member 30, and the entire image 55 may be separated from the decorative member 30. The distance along the third direction D3 between the central position of the generated image 55 in the third direction D3 and the decorative member 30 may be 10 mm or more and 100 mm or less, or may be 20 mm or more and 50 mm or less.

[0066] The image 55 may be generated at a position overlapping the hologram element 50 and the decorative sheet 40 in the projection in the third direction D3. The image 55 may be generated at a position that does not overlap, partially or entirely, with the hologram element 50 and the decorative sheet 40 in the projection in the third direction D3. The image 55 may be generated at a position between the face of the user 100 of the input device 20 and the hologram element 50 and the decorative sheet 40.

[0067] The image 55 generated by the hologram element 50 is not particularly limited. The generated image 55 may perform a display that guides the input of the user 100. For example, the image 55 may indicate an input switch 56. The image 55 as the input switch 56 may be a push button, a rotary dial, or a lever. Further, the image 55 may indicate a surface located at a position separated from both the hologram element 50 and the decorative sheet 40.

[0068] As shown in FIGS. 4 and 5, the hologram element 50 may include a substrate 52 and a hologram recording layer 54.

[0069] The hologram element 50 includes a hologram recording layer 54. The hologram recording layer 54 is a so-called hologram. Information regarding interference fringes for reproducing an image 55 is recorded in the hologram recording layer 54. When the hologram recording layer 54 is irradiated with reproduction illumination light having a specific wavelength from a specific direction, the reproduction illumination light is diffracted in a predetermined direction. The diffracted light of the hologram recording layer 54 reproduces a predetermined image 55 at a predetermined position as reproduction light.

[0070] The information regarding interference fringes can be recorded in the hologram recording layer 54 in various forms. The hologram recording layer 54 may be a phase-type hologram or an amplitude-type hologram. The hologram recording layer 54 may be a reflection-type hologram or a transmission-type hologram. The hologram recording layer 54 may be a relief hologram or a relief hologram as a computer-generated hologram (CGH). The hologram recording layer 54 may be a volume hologram in that it can generate a large image 55. Examples of materials for the hologram recording layer 54 as a volume hologram include cured products such as silver salt light-sensitive materials, dichromated gelatin, crosslinkable polymers, and photopolymers. The thickness of the hologram recording layer 54 may be 1 μm or more and 100 μm or less, or may be 5 μm or more and 40 μm or less.

[0071] The hologram recording layer 54 as a volume hologram can be easily replicated using a hologram master. The hologram master can be produced by exposing a photosensitive material to object light, which is reflected light from an actual object, and reference light that has a coherent relationship with the object light. The relationship between the photosensitive material and the reference light during this exposure may be determined based on the relationship between the hologram recording layer 54 and the light source in the input device 20. Similarly, the relative position between the hologram master and the actual object may be determined based on the relationship between the hologram recording layer 54 and the generation position of the image 55 in the input device 20. Furthermore, the wavelength of the light used for the exposure can be determined based on the wavelength of the light emitted by the light source 60 of the input device 20. The hologram recording layer 54 as a volume hologram produced in this way can diffract light of a specific wavelength incident from a specific direction and generate an image 55 at a predetermined relative position with respect to the hologram recording layer 54.

[0072] The hologram element 50 may have a plurality of hologram recording layers 54. According to the plurality of hologram recording layers 54, a plurality of mutually different images 55 can be generated. The plurality of hologram recording layers 54 may generate images 55 that are different in one or more of shape, size, and generation position by being irradiated with light from mutually different directions. The plurality of hologram recording layers 54 may generate images 55 of different colors by being irradiated with light of mutually different wavelengths. When the hologram recording layer 54 is a volume hologram, a plurality of images 55 may be generated by a single hologram recording layer 54 by multiplex recording.

[0073] The base material 52 supports the hologram recording layer 54. The base material 52 has visible light transmissibility. Examples of the material of the base material 52 include polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polystyrene, cyclic polyolefin, and the like. The thickness of the base material 52 along the third direction D3 may be 10 μm or more and 100 μm or less.

[0074] The hologram element 50 may further include a functional layer (not shown) that covers the hologram recording layer 54. The functional layer can be expected to have various functions. Examples of the various functions include a hard coat function, an antireflection function, an antiglare function, an antistatic function, an antifouling function, etc. The functional layer may be the outermost surface layer of the hologram element 50. The functional layer as the outermost surface layer may be a hard coat layer having scratch resistance, etc.

[0075] The decorative sheet 40 and the hologram element 50 may be joined via an adhesive layer or the like.

[0076] The light source 60 emits light toward the decorative sheet 40. The light from the light source 60 is diffracted by the hologram element 50 to generate an image 55. Therefore, the light source 60 emits light having a wavelength that can be diffracted by the hologram element 50.

[0077] In the input device 20 shown in FIGS. 1 and 2, a single light source 60 is provided. The illustrated light source 60 functions as a point light source. That is, this light source 60 emits divergent light. A light emitting diode may be used as the light source 60. According to such an example, light enters each position of the hologram recording layer 54 from a specific direction, and the image 55 can be clearly displayed.

[0078] As another light source 60, a surface light source device that emits parallel light from a light emitting surface may be used. Also according to this example, light enters each position of the hologram recording layer 54 from a specific direction, and the image 55 can be clearly displayed.

[0079] When the hologram element 50 generates a plurality of images 55, the light source 60 may emit light corresponding to each image 55. The light source may be capable of emitting light of different wavelengths. The light source 60 may have a first light source 61 and a second light source 62 arranged at different positions as shown in FIGS. 14 to 15B, which will be referred to later. According to the first light source 61 and the second light source 62 arranged at different positions, the hologram element 50 can be irradiated with light from different directions.

[0080] The sensor 65 detects the input operation by the user 100. The sensor 65 can detect the operation of the user 100 corresponding to the image 55. The hologram element 50 may reproduce the image 55 within the detectable area 70 of the sensor 65. The hologram element 50 may reproduce the image 55 between the detectable area 70 of the sensor 65 in the third direction D3 and the decorative member 30. The hologram element 50 may reproduce the image 55 between the detectable area 70 of the sensor 65 in the third direction D3 and the decorative sheet 40 and the hologram element 50. The sensor 65 can detect the operation of the user 100 in a non-contact manner. As the sensor 65 used in the input device 20, a position detection sensor 66, a motion sensor 67, an eye tracking sensor, etc. can be used.

[0081] The sensor 65 may detect whether a detection object such as a part of the body of the user 100, for example, a finger of the user 100, or an object operated by the user 100, for example, an input pen, etc. exists within the detectable area 70 of the sensor 65. According to the position detection sensor 66, the presence or absence of a detection object within the detectable area 70 can be detected.

[0082] The position detection sensor 66 may include a light emitter that emits a test light such as infrared light, a reflector that reflects the test light, and a light receiver that receives the test light reflected by the reflector. According to such a position detection sensor 66, in a state where the light receiver cannot receive the high-intensity reflected light from the reflector, it can be determined that a detection object exists between the reflector, the light emitter, and the light receiver. In this position detection sensor 66, the light emitter and the light receiver can be arranged close to each other. At this time, the detectable area 70 can be a planar area that spreads between the reflector, the light emitter, and the light receiver. More specifically, as shown in FIG. 1, a detection surface 66P (see FIG. 1) that is separated from the decorative member 30 in the third direction D3 and spreads planar in a direction orthogonal to the third direction D3, or the detection surface 66P and its vicinity, may be used as the detectable area 70. In the example shown in FIG. 1, the detectable area 70 spreads in both the first direction D1 and the second direction D2.

[0083] Further, the sensor 65 may detect the position where a detection target such as a part of the user 100's body or an object operated by the user 100 exists within the detectable area 70. According to the position detection sensor 66, it is possible to detect the existence position of the detection target within the detectable area 70. According to the position detection sensor 66 having the light emitter, the reflector, and the light receiver described above, based on the change in the timing at which the test light emitted from the light emitter at a constant period is received by the light receiver, the position of the detection target within the detectable area 70 can be detected. In the example shown in FIG. 1, the position detection sensor 66 can specify the position where the detection target intersects the detection surface 66P in both the first direction D1 and the second direction D2.

[0084] Furthermore, the sensor 65 may detect the operation of a detection target such as a part of the user 100's body or an object operated by the user 100, for example, a swipe operation, a double-click operation, a rotation operation, etc. According to the sensor 65 constituted by the motion sensor 67, the operation of the detection target can be detected. The motion sensor 67 may include an image pickup element that picks up an image of the detection target and a confirmation unit that processes the data picked up by the image pickup element to specify the operation of the detection target.

[0085] As shown in FIG. 1, the input device 20 has a control unit 28. The control unit 28 is electrically connected to the display device 25, the light source 60, the sensor 65, etc. The control unit 28 receives the detection result from the sensor 65. The control unit 28 may control the display device 25 and the light source 60 based on the input by the user 100 specified from the detection result of the sensor 65.

[0086] The control unit 28 may include a processor such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The control unit 28 may further include a memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory). The control unit 28 may control the display device 25 and the light source 60 according to the detection result of the sensor 65, etc., by executing the program recorded in the memory.

[0087] Next, the operation of the input device 20 having the above configuration will be described. Hereinafter, a plurality of input devices 20 will be described. For the plurality of input devices 20, the same components will be denoted by the same reference numerals, and duplicate descriptions will be omitted.

[0088] When the user 100 is not performing an input, the display device 25 may be in a non-display state in which no image is displayed. At this time, as shown in FIG. 1, the design of the decoration sheet 40 can be observed on the decoration member 30 of the input device 20 through the transparent hologram element 50. In the illustrated example, the user 100 observes the design displayed by the decoration layer 44 of the decoration sheet 40. The decoration sheet 40 forms an excellent design with rich expressiveness such as printing. Due to the design expression of the decoration sheet 40, harmony and unity with the surrounding environment are ensured, and furthermore, excellent design can be imparted to the environment where the decoration member 30 is installed. In addition, the display device 25 is concealed by the decoration sheet 40. That is, according to the decoration member 30, the display device 25 can be installed while ensuring harmony and unity with the surrounding environment. These days, the application range of the input device 20 is rapidly expanding, and by using the decoration member 30, the input device 20 can be applied to the interiors of automobiles, building interiors, furniture, electrical appliances, etc., where design is emphasized.

[0089] Next, the operation of the input device 20 when the user 100 performs an input operation will be described. In the example shown in FIGS. 7 to 10, the sensor 65 is a position detection sensor 66. As shown in FIGS. 7 and 8, the position detection sensor 66 includes a detection surface 66P parallel to the sheet surface of the decoration member 30 or the display surface 25a of the display device 25 at the center of the detectable region 70. As shown in FIGS. 7 and 8, light is emitted from the light source 60. The light from the light source 60 is irradiated onto the hologram element 50 of the decoration member 30. An image 55 reproduced by the light from the light source 60 is recorded in the hologram element 50. The light source 60 is appropriately positioned with respect to the hologram element 50. The light source 60 irradiates light of a predetermined wavelength from a predetermined direction so that the image 55 is reproduced with high efficiency by the hologram element 50.

[0090] When the hologram element 50 is irradiated with light from the light source 60, the image 55 is reproduced. As shown in FIGS. 7 and 8, the image 55 is generated at a position away from both the hologram element 50 and the decorative sheet 40 in the third direction D3. In the illustrated example, the image 55 faces the third direction D3 from the same side as the user 100 with respect to the hologram element 50 and the decorative sheet 40. The image 55 serves as an indicator showing the position for performing an input operation with respect to the user 100. As an example, the image 55 indicates the input switch 56.

[0091] FIG. 9 shows the decorative member 30 in a state where the image 55 is displayed from the third direction D3. In the example shown in FIG. 9, the hologram element 50 displays images of four push-button type input buttons. Each push-button type input switch 56 is represented by a rectangular outline and information related to the push-button type input switch 56. In the state shown in FIG. 9, the image 55 displays the four push-button type input switches 56, and the alphabets "A", "B", "C", and "D" are shown as information related to each push-button type input switch 56.

[0092] As shown in FIG. 8, the position where each push-button type input switch 56 is imaged is away from the decorative member 30 in the third direction D3. The position of the image 55 is near the detection surface 66P where the position detection sensor 66 has high sensitivity in the third direction D3.

[0093] When the image 55 indicates the input switch 56, the user 100 is prompted to perform an operation on the displayed input switch 56. The user 100 tries to press the input switch 56 to be selected with a finger, an input pen, or the like. The position detection sensor 66 can detect a detection target such as a finger or an input pen when the detection target crosses the detection surface 66P. Also, the position detection sensor 66 can specify the position of the detection target in the first direction D1 and the second direction D2. From the detection result by the position detection sensor 66, the input switch 56 selected by the user 100 is specified. The control unit 28 receives the detection result at the sensor 65 and accepts the input of the user 100.

[0094] The hologram element 50 may generate the image 55 superimposed on the detection surface 66P by the position detection sensor 66. In the illustrated example, the image 55 is located between the detection surface 66P and the decorative member 30 in the third direction D3. Therefore, when the user 100 moves a detection target such as a finger or an input pen toward the image 55, the detection target crosses the detection surface 66P before reaching the image 55. Therefore, the input of the user 100 can be stably detected. The distance between the position where the image 55 along the third direction D3 is generated and the detectable region 70 may be 5 mm or more, may be 3 mm or less, or may be 1 mm or less.

[0095] In the illustrated example, further, the control unit 28 controls the display device 25 based on the input information. Specifically, as shown in FIG. 10, the display device 25 performs a display indicating that "A" has been selected. In the example shown in FIG. 10, the area 26 of the display surface 25a facing the input switch 56 of "A" is displayed in white. Also, a thick line is displayed in the area 27 of the display surface 25a facing the periphery of the input switch 56 of "A" in the third direction D3. By changing the display on the display surface 25a, the user 100 understands that the input has been received by the input device 20. Thereby, the user 100 finishes the input operation before the finger, the input pen, or the like of the user 100 contacts the decorative member 30.

[0096] According to the input device 20 as described above, the image 55 is generated at a position at least partially separated from both the hologram element 50 and the decorative sheet 40. The image 55 attracts the attention of the user 100 who performs the input and guides the input operation of the user 100. By associating the generation position of the image 55 with the detectable area 70 of the sensor 65, the non-contact sensor 65 can stably detect the operation of the user 100 with respect to the image 55, which is performed away from both the hologram element 50 and the decorative sheet 40. That is, by guiding the input operation of the user 100 by the image 55 generated by the hologram element 50, the input of the user 100 can be received without the user 100 or the input pen contacting the decorative member 30 that exhibits an excellent design. Therefore, it is possible to suppress the adhesion of fingerprints and dirt to the decorative member 30. Thereby, the decorative member 30 can be kept clean and the excellent design property of the input device 20 can be maintained. In addition, since the user 100 does not contact the input device 20, it is possible to suppress contact infection of viruses or the like via the input device 20.

[0097] In the above specific example, the image 55 indicates the input switch 56, and the sensor 65 detects the operation of the user 100 with respect to the input switch 56. The image 55 indicating the input switch 56 can more intuitively guide the input operation of the user 100. Thereby, the input operation at a position away from the decorative member 30 can be more stably detected by the sensor 65.

[0098] In the above specific example, the visible light transmittance of the hologram element 50 is set to 50% or more. The hologram element 50 faces the user 100, and the decorative sheet 40 is located between the hologram element 50 and the display device 25. Since the hologram element 50 has a high visible light transmittance, the design of the decorative sheet 40 can be clearly observed through the hologram element 50. In addition, the light from the light source 60 is incident on the hologram element 50 without passing through the decorative sheet 40. The diffracted light at the hologram element 50 generates the image 55 without passing through the decorative sheet 40. Therefore, the image 55 can be clearly displayed while using the light of the light source 60 with high utilization efficiency.

[0099] In the above specific example, the image 55 and the light source 60 are located on the same side in the third direction D3 with respect to the hologram element 50. That is, the hologram element 50 is a reflective volume hologram. The reflective volume hologram has strong wavelength selectivity and strong angular selectivity. Therefore, generation of the image 55 by ambient light such as illumination can be suppressed, and the image 55 can be clearly generated with high diffraction efficiency by the light from the light source 60.

[0100] Next, mainly with reference to FIGS. 11 to 12D, the operation of another input device 20 will be described.

[0101] In the input device 20 shown in FIG. 11, the hologram element 50 shows a decorative sheet 40 and a surface 57 located away from the hologram element 50. In the example shown in FIG. 11, the display device 25 may display the input switch 56 on the display surface 25a. Also in this example, the input operation of the user 100 can be intuitively guided by the image 55. Specifically, the user 100 moves a finger or an input pen to a position where the image 55 in the third direction D3 is generated and where the input switch 56 to be selected faces the third direction D3. The sensor 65 detects the operation of the user 100 with respect to the surface 57 indicated by the image 55. Also by this example, the input operation can be promoted while suppressing contact of the finger or input pen of the user 100 with the decorative member 30. Thereby, the decorative member 30 can be kept clean and the excellent design of the input device 20 can be maintained.

[0102] Examples of the image 55 showing the surface are shown in FIGS. 12A to 12D. In the examples shown in FIGS. 12A and 12B, the image 55 has dot images dispersed on the surface 57 to be shown. That is, the image 55 shows the surface 57 as a set of dot images. In the example shown in FIG. 12A, the dot images are regularly arranged. In the example shown in FIG. 12B, the dot images are irregularly arranged. The hologram element 50 can reproduce the image 55 not only by the light from the light source 60 but also by ambient light such as illumination. In the examples shown in FIGS. 12A and 12B, the dot images generated by the ambient light are difficult to be distinguished from the dot images generated by the light from the light source 60. That is, even if an unintended image is generated by the ambient light, the input operation of the user 100 can be stably guided by the image 55.

[0103] In the example shown in FIG. 12C, the image 55 includes an image of a line dispersed on the surface 57 to be shown. That is, the image 55 shows the surface 57 as a set of line images. In the example shown in FIG. 12C, the line images are regularly arranged. The line images may be irregularly arranged. Also according to the example shown in FIG. 12C, the input operation of the user 100 can be stably guided by the image 55.

[0104] In the example shown in FIG. 12D, the image 55 includes a plurality of designs arranged on the surface 57 to be shown. The image 55 shown in FIG. 12D includes the character string "XYZ". However, not limited to the illustrated example, the image 55 may include marks such as figures and symbols, logos, etc., or combinations of characters and figures, symbols, etc. According to the example shown in FIG. 12D, additional design properties can be imparted to the input device 20 at the time of generating the image 55. Also according to the example shown in FIG. 12C, the input operation of the user 100 can be stably guided by the image 55.

[0105] In the example shown in FIG. 13, the hologram element 50 generates a three-dimensional image 55. In the example shown in FIG. 13, the image 55 shows a dial-type input switch 56. The illustrated input switch 56 overlaps with the decorative member 30 in a part in the third direction D3, but is separated from the decorative member 30 in the third direction D3 in most parts. In the example shown in FIG. 13, when the hologram element 50 reproduces the rotary dial-type input switch 56 as the image 55, the user 100 can intuitively notice that the input is performed by the operation of rotating the input switch 56. In this example, the sensor 65 is constituted by a motion sensor 67 to detect the rotational operation of the user 100 with respect to the input switch 56. Also according to the example shown in FIG. 13, the input operation can be promoted while suppressing the contact of the finger, input pen, etc. of the user 100 with the decorative member 30. Thereby, the decorative member 30 can be kept clean and the excellent design property of the input device 20 can be maintained.

[0106] In the examples shown in FIGS. 14 to 15B, the light source 60 includes a first light source 61 and a second light source 62 that irradiate the hologram element 50 with light. In the illustrated example, the first light source 61 and the second light source 62 irradiate the hologram element 50 with light from different directions. The first light source 61 and the second light source 62 may emit light of the same wavelength or light of different wavelengths. The hologram element 50 generates a first image 55A by the light from the first light source 61. The hologram element 50 generates a second image 55B by the light from the second light source 62. In this input device 20, the light emission state of the light source 60 may be controlled according to the situation, and the generated image 55 may be appropriately selected between the first image 55A and the second image 55B.

[0107] For example, in the state shown in FIG. 15A, light is emitted from the first light source 61, and the first image 55A is generated. The first image 55A may be a push-button type input switch 56. The position detection sensor 66 can detect the operation of the user 100 who presses the first image 55A, which is the push-button type input switch 56, in the third direction D3.

[0108] When an operation of pushing the first image 55A is detected based on the detection result of the position detection sensor 66, the first light source 61 is turned off and the second light source 62 is turned on under the control from the control unit 28. As shown in FIG. 15B, the light from the second light source 62 irradiates the hologram element 50, and the second image 55B is generated. The second image 55B may also be a button-type input switch 56 similar to the first image 55A. The second image 55B is generated at a position different from that of the first image 55A in the third direction D3. The second image 55B is closer to the decorative member 30 in the third direction D3 than the first image 55A. By changing the display of the first image 55A and the second image 55B, the user 100 can intuitively understand that the button-type input switch 56 has been pushed and the input has been received.

[0109] Also according to the example shown in FIGS. 14 to 15B, it is possible to encourage the input operation while suppressing contact of the finger, input pen, etc. of the user 100 with the decorative member 30. Thereby, the decorative member 30 can be kept clean and the excellent design property of the input device 20 can be maintained. Also, the irradiation direction of the light for generating the first image 55A is different from the irradiation direction of the light for generating the second image 55B. Therefore, when displaying one of the first image 55A and the second image 55B, it is possible to suppress the other from being brightly displayed. By switching between the first image 55A and the second image 55B, the design property of the input device 20 can be further improved.

[0110] In the above-described embodiment, the input device 20 includes a light source 60, a hologram element 50 that generates an image 55 by the light from the light source 60, a decorative sheet 40 superimposed on the hologram element 50, and a sensor 65 that detects the operation of the user 100. Also, in one embodiment, the decorative member 30 includes a hologram element 50 that generates an image 55 and a decorative sheet 40 superimposed on the hologram element 50. The image 55 is generated at a position at least partially separated from both the hologram element 50 and the decorative sheet 40. According to such an embodiment, the hologram element 50 can prompt the user 100 to perform an input operation away from both the hologram element 50 and the decorative sheet 40 by generating the image 55. The sensor 65 can stably detect the input operation of the user 100 that is performed away from both the hologram element 50 and the decorative sheet 40. Thereby, the input of the user 100 can be received without the user 100 or the input pen contacting the decorative member 30 that exhibits an excellent design. Therefore, it is possible to suppress fingerprints and dirt from adhering to the decorative member 30. Thereby, the excellent design property of the input device 20 can be maintained.

[0111] Although an embodiment has been described with reference to specific examples, the above-described specific examples do not limit the embodiment. The above-described embodiment can be implemented with various other specific examples, and various omissions, replacements, changes, additions, etc. can be made without departing from the gist thereof.

[0112] Hereinafter, with reference to the drawings, an example of a modification will be described. In the following description and the drawings used in the following description, for parts that can be configured in the same manner as the above-described specific examples, the same reference numerals as those used for the corresponding parts in the above-described specific examples are used, and redundant descriptions are omitted.

[0113] In the above-described specific example, the hologram element 50 faced the user 100, and the decorative sheet 40 was positioned between the hologram element 50 and the display device 25 in the third direction D3. The arrangement of the hologram element 50 and the decorative sheet 40 in the third direction D3 may be reversed. That is, as shown in FIG. 16, the decorative sheet 40 may face the user 100, and the hologram element 50 may be positioned between the decorative sheet 40 and the display device 25 in the third direction D3.

[0114] In the illustrated example, a point light source was used as the light source 60. However, it is not limited to this example. As shown in FIGS. 17 and 18, a surface light source device 63 having a planar light emitting surface 63a may be used as the light source 60. The surface light source device 63 has, as main components, a light guide plate 64A and a light emitter 64B. The light emitted from the light emitter 64B enters the light guide plate 64A. The light travels through the light guide plate 64A while being emitted little by little from the light guide plate 64A. The traveling direction of the light emitted from the light guide plate 64A may be condensed using an optical member or the like. Thereby, an image 55 that can be clearly observed can be generated. In the input device 20 shown in FIG. 17, the display device 25, the decorative sheet 40, the hologram element 50, and the surface light source device 63 are stacked in this order in the third direction D3. In the input device 20 shown in FIG. 18, the display device 25, the hologram element 50, the surface light source device 63, and the decorative sheet 40 are stacked in this order in the third direction D3.

Explanation of Reference Numerals

[0115] D1: First direction, D2: Second direction, D3: Third direction, 10: Moving body, 11: Automobile, 12: Furniture, 13: Electrical appliance, 20: Input device, 25: Display device, 25a: Display surface, 26: Region, 27: Region, 28: Control unit, 30: Decorative member, 40: Decorative sheet, 42: Base material, 44: Decorative layer, 44A: Decorative part, 44B: Transmissive part, 45: Opening, 47: Design layer, 47A: First design layer, 47B: Second design layer, 49: Light-shielding layer, 50: Hologram element, 52: Base material, 54: Hologram recording layer, 55: Image, 55A: First image, 55B: Second image, 56: Input switch, 57: Surface, 60: Light source, 61: First light source, 62: Second light source, 63: Surface light source device, 63a: Light-emitting surface, 64A: Light guide plate, 64B: Light-emitting body, 65: Sensor, 66: Position detection sensor, 66P: Detection surface, 67: Motion sensor, 70: Detectable region, 100: User

Claims

1. A light source, a hologram element that generates an image by light from the light source, a decorative sheet superposed on the hologram element, a sensor that detects the operation of a user, and an input device including a display device having a display surface for displaying an image, wherein the hologram element and the decorative sheet are superposed on the display surface, the light source includes a first light source that irradiates the hologram element with light and a second light source that irradiates the hologram element with light from a direction non-parallel to the first light source, the hologram element generates a first image by the light from the first light source and generates a second image different from the first image by the light from the second light source, by controlling the light emission states of the first light source and the second light source, the image observed by the user of the input device can be changed between the first image and the second image, the image is generated at a position at least partially separated from both the hologram element and the decorative sheet, and is observed together with the design displayed by the decorative sheet, when the display device is in a non-display state, the decorative sheet conceals the display device and displays the design, and when the display device is in a display state, the image can be observed through the decorative sheet. An input device.

2. the image indicates an input switch, and the sensor according to claim 1, wherein the sensor detects an operation of the user with respect to the input switch.

3. the image indicates a surface located away from the decorative sheet, and the sensor according to claim 1, wherein the sensor detects an operation of the user with respect to the surface.

4. The input device according to any one of claims 1 to 3, wherein the hologram element is located between the image and the decorative sheet.

5. The input device according to any one of claims 1 to 3, wherein the decorative sheet is located between the image and the hologram element.

6. The input device according to any one of claims 1 to 4, wherein the decorative sheet is located between the display surface and the hologram element.

7. The input device according to any one of claims 1 to 3 and 5, wherein the hologram element is located between the display surface and the decorative sheet.

8. The input device according to any one of claims 1 to 7, wherein the hologram element includes a volume hologram.

9. The input device according to any one of claims 1 to 8, wherein the visible light transmittance of the hologram element is 50% or more.

10. A moving body comprising the input device according to any one of claims 1 to 9.

11. Furniture comprising the input device according to any one of claims 1 to 9.

12. An electrical appliance comprising the input device according to any one of claims 1 to 9.

Images