Display device using decorative panel

Abstract

The present invention provides a display device using a decorative plate. The display device using a decorative plate comprises a decorative plate, a film layer, a transparent substrate, a first shielding layer, a light diffusion layer, a light coloring layer and a second shielding layer. The first shielding layer is arranged closer to the decorative plate than the second shielding layer and the light coloring layer. In order of thickness from large to small, they are the decorative plate, the transparent substrate, the film layer, and the second shielding layer. The second shielding layer, the first shielding layer and the light diffusion layer have the same thickness. The light diffusion layer is thicker than the light coloring layer. The transparent substrate and the film layer have the same light transmittance. In order of light transmittance from high to low, they are the film layer, the decorative plate, the light diffusion layer, the light coloring layer, the first shielding layer, and the second shielding layer.

Description

Technical Field

[0001] The present disclosure relates to a display device having a decoration technology based on lighting using a decoration plate. Background Art

[0002] In recent years, in the decoration methods of the surfaces of exterior parts or panels in the fields of home appliance exteriors and vehicle interiors, the demand for wide-ranging design expressions and high-quality exterior design has increased due to the diversification of customer orientation and the recent orientation towards genuine products and high quality. Among them, as one of the decoration methods that express a sense of luxury, there is a demand for a method with high exterior design that combines a natural wood decorative board with light. Here, a decorative board refers to a sheet-like plate obtained by thinly slicing wood.

[0003] As a decoration method using a decorative plate, in addition to the method of attaching the decorative plate itself to the housing to express the appearance in a wooden manner, there is generally known a method of providing a light source on the back of the decorative plate, and making the wood grain of the decorative plate or the style of the characters or patterns provided on the back of the decorative plate emerge through the light passing through the decorative plate. In particular, the latter method can achieve a higher appearance design.

[0004] Patent Document 1 discloses a wooden decorative molding in which a base material joined and integrated is provided on the back of a decorative board, and a design layer is arranged on the back of the base material. Figure 4 .

[0005] Figure 4 The wooden decorative molding 101 comprises a decorative board 102, a substrate 103, a design layer 105, and Figure 4 The top coating layer 105 is omitted in the figure but is provided on the surface of the decorative plate 102. The decorative plate 102 is formed to be as thin as about 2 mm in thickness, so it has a certain degree of transparency. The transparent substrate 103 is joined and integrated on the back of the decorative plate 102 by injection molding. In addition, the design layer 105 can be provided on either the surface side or the back side of the substrate 103. In addition, although not shown in the figure, a light source for lighting can be provided on the back of the wooden decorative molding, or a display material for displaying given information can be provided on the surface of the decorative plate 102.

[0006] Regarding the wooden decorative molding, since the decorative board 102 and the base material 103 are transparent, the design layer 105 is visible through the surface and appears to be composite with the decorative board 102, thereby making it possible to change the design of the decorative board 102. The design layer 105 can be arbitrarily selected, for example, with color or with patterns / characters, etc., so that the design can be freely changed. In addition, by combining with a light source, the color tone or brightness of the decorative board can also be changed. Furthermore, in the case where the display material is provided on the surface of the decorative board 102, by lighting the light source provided on the back of the wooden decorative molding, the information displayed on the display material can be confirmed even in a dark place.

[0007] Prior Art Literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2001-341106 Summary of the invention

[0010] A display device using a decorative plate includes a decorative plate, a film layer, a transparent substrate, a first shielding layer, a light diffusion layer, a light color adjustment layer, and a second shielding layer.

[0011] The decorative board has a first surface and a second surface opposite to the first surface, and is made of natural wood.

[0012] The film layer is disposed on the first surface of the decorative plate.

[0013] The transparent substrate, the first shielding layer, the light diffusion layer, the light color adjustment layer, and the second shielding layer are arranged on the second surface side of the decorative plate.

[0014] The first shielding layer is disposed closer to the decorative plate than the second shielding layer and the light color adjustment layer.

[0015] In addition to the above-mentioned arrangement relationship, the transparent substrate, the first shielding layer, the light diffusion layer, the light color adjustment layer, and the second shielding layer may be arranged in any order.

[0016] The order from thickest to smallest is the decorative plate, the transparent substrate, the film layer, and the second shielding layer.

[0017] The second shielding layer, the first shielding layer, and the light diffusion layer have the same thickness.

[0018] The light diffusion layer is thicker than the light toning layer.

[0019] In the light transmittance measured when the light from the light source is irradiated from the second surface side of the decorative plate toward the first surface side, the transparent substrate and the film layer have the same light transmittance. In descending order of light transmittance, the film layer, the decorative plate, the light diffusion layer, the light coloring layer, the first shielding layer, and the second shielding layer are in descending order. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1A This is a front view of a display device using a resin member in Embodiment 1.

[0021] Figure 1B The display device using the resin component in Embodiment 1 Figure 1A AA line section view.

[0022] Figure 2A This is a front view of a display device using a resin member in Embodiment 2.

[0023] Figure 2B A display device using a resin component in Embodiment 2 Figure 2A BB line cross-sectional view.

[0024] Figure 2C This is a front view of a display device using a resin member in Embodiment 2.

[0025] Figure 2D A display device using a resin component in Embodiment 2 Figure 2C CC line section view.

[0026] Figure 3A This is a front view of a display device using a resin member in Embodiment 3.

[0027] Figure 3B A display device using a resin component in Embodiment 3 Figure 3A DD line cross-sectional view.

[0028] Figure 4 This is a cross-sectional view of a conventional wooden decorative molding. DETAILED DESCRIPTION

[0029] In the previous examples, when the light source is off, only the original wood grain or color of the decorative board can be visually identified. Therefore, when the light source is on, it is difficult to achieve a performance of light performance with excellent design, such as light representing arbitrary characters or marks, etc., emerging on a part of the surface of the decorative board. In the previous examples, since the decorative board 102 and the substrate 103 with transparency are used, the design of the design layer 105 is displayed on the surface of the decorative board 102 across the substrate 103. Therefore, even when the light source is off, the arbitrary design of the design layer 105 will be visible on the surface of the decorative board. Furthermore, in the case of having an arbitrary character or mark portion that is intended to be displayed through light only when the light source is on, in addition to the display portion, a shielding layer with high shielding properties, such as a layer composed of black ink with a large pigment component, is required. However, in the previous examples, the color itself will also be transparent to the surface of the decorative board 102, so the original color of the decorative board 102 will become darker.

[0030] Therefore, it is considered to solve the aforementioned problem of color transparency of the layer provided on the back of the decorative board by further adding a layer between the decorative board 102 and the substrate 103. However, in addition to the light diffusion of the additional layer, since the natural wood decorative board itself has countless gaps inside, light diffusion is prone to occur. In other words, when any characters or marks are displayed on the surface of the decorative board, there is also the problem that their outlines are blurred and not clearly displayed. This problem may become a fatal problem in the field of small line width and clear display required for vehicle-mounted substrates, etc. Therefore, in the design expression based on the combination of the decorative board and the light when the light source is lit, it is very important to appropriately select the layer structure on the back of the decorative board.

[0031] Hereinafter, embodiments of the present disclosure will be described based on the drawings.

[0032] (Implementation Method 1)

[0033] Figure 1A as well as Figure 1B The display device 80 using the decorative panel 1 according to the first embodiment of the present disclosure is shown.

[0034] The display device 80 is composed of a resin member 31 having the decorative plate 1 as a structural element, and a light source 10 for a backlight.

[0035] The resin member 31 includes at least a decorative plate 1, a film layer 2, a transparent base material 3, a first shielding layer (metal shielding layer 4), a light diffusion layer 5, a light coloring layer 6, and a second shielding layer 7. The resin member 31 is configured as follows.

[0036] The decorative board 1 is a sheet-shaped plate material obtained by thinly slicing wood, and is made of, for example, natural wood. A thin film layer 2 is formed on a surface (that is, a first surface) that is one surface of the decorative board 1 .

[0037] A plurality of components are arranged on the back side (i.e., the second surface) of the other side of the decorative plate 1. For example, a transparent substrate 3 is formed on the back side of the other side of the decorative plate 1. On the back side of the transparent substrate 3, as an example, a metal shielding layer 4 as a first shielding layer, a light diffusion layer 5, a light coloring layer 6, and a second shielding layer 7 are sequentially formed. Furthermore, a reinforcing layer 9 is bonded to the back side of the second shielding layer 7 via an adhesive layer 8.

[0038] The order of composing the components on the back side of the decorative plate 1 is not limited to the above order, but is arbitrary. However, the metal shielding layer 4 is provided on the decorative plate 1 side relative to the light color adjustment layer 6 and the second shielding layer 7 .

[0039] The decorative board 1 is a sliced ​​sheet of natural wood on the surface side, with a light transmittance of 5% or more and 30% or less, and a thickness of 0.1mm or more and 0.6mm or less, and has wood-derived concavities and convexities on its surface. In addition, if the thickness of the decorative board 1 is less than 0.1mm, it is too thin, easy to break, and difficult to handle. On the other hand, if the thickness exceeds 0.6mm, it is too thick and light is not easy to pass through. In addition, the inside of the decorative board 1 is impregnated with an organic resin with a molecular weight range of 100 or more and 50,000 or less, such as polyethylene glycol or phenolic resin, etc., which varies according to the purpose. By performing the impregnation treatment, the mechanical strength of the decorative board 1 is improved, and further, the light transmittance of the decorative board itself is higher than before the impregnation, so that the transparency of the decorative board 1 itself is improved, and thus the light transmittance can be improved. In addition to the organic resin, pigments, light-storing paints, dyes, or flame retardants are optionally added to the decorative board 1, thereby improving the appearance or functionality of the decorative board 1 in accordance with the mechanical strength. In addition, the "decorative board" 1 mentioned here includes not only a single sheet of natural wood, but also, for example, a processed sheet-like wood board obtained by stacking a plurality of natural wood sheets and slicing them into a thickness of 0.1 mm or more and 0.6 mm or less.

[0040] The film layer 2 has a film thickness of 5 μm or more and 50 μm or less, and is formed on the surface (first surface) of the decorative board 1. The layer structure of the film layer 2 is 1 layer or 2 layers, which can be changed according to the reliability standard of the target product. The minimum thickness at this time is 5 μm. The film layer 2 is transparent, and the color or wood grain of the decorative board 1 is visible on the surface of the film layer 2. The thickness of a general thick film transparent coating exceeds 50 μm. Therefore, the decorative board formed with the thick film transparent coating will feel a sense of depth. In contrast, since the film thickness of the film layer 2 is 5 μm or more and 50 μm or less, the distance between the surface of the film layer 2 and the decorative board 1 becomes closer, and the original texture of the decorative board can be felt.

[0041] The surface of the film layer 2 can be given arbitrary irregularities by die embossing, embossed plates, embossed films, or by adding fillers, etc. Therefore, the appearance, touch, glossiness, etc. of the surface can be freely changed.

[0042] The transparent substrate 3 has a film thickness of 20 μm or more and 200 μm or less, and is formed of a light-transmitting material such as a polycarbonate resin or an acrylic resin. By forming the transparent substrate 3 on the back side of the decorative plate 1, the decorative plate 1 is reinforced and becomes resistant to breakage and bending. If the film thickness of the transparent substrate 3 is less than 20 μm, it is too thin and difficult to handle. On the other hand, if the film thickness exceeds 200 μm, it is too thick when attached to the decorative plate 1, and the decorative plate 1 is easy to curl and difficult to handle.

[0043] The metal shielding layer 4 (first shielding layer) has light-transmitting portions 11a, 11b, 11c (first light-transmitting portions) in the shape of arbitrary characters, marks, or patterns in a portion of the layer. The positions and shapes of the light-transmitting portions 11a, 11b, 11c are substantially consistent with the positions and shapes of the light-transmitting portions 12a, 12b, 12c (second light-transmitting portions) of the second shielding layer 7 when viewed from the surface of the thin film layer 2 side of the decorative plate 1. Here, the outer periphery of the contour of the light-transmitting portions 11a, 11b, 11c is formed larger than the light-transmitting portions 12a, 12b, 12c of the second shielding layer 7. That is, when viewed from the surface of the thin film layer 2 side of the decorative plate 1, the centers of the light-transmitting portions 11a and 12a are consistent. The centers of the light-transmitting portions 11b and 12b are consistent. The centers of the light-transmitting portions 11c and 12c are consistent. The outer periphery of the light-transmitting portion 11a is larger than the outer periphery of the light-transmitting portion 12a. The outer periphery of the light-transmitting portion 11b is larger than the outer periphery of the light-transmitting portion 12b. The outer periphery of the light-transmitting portion 11c is larger than the outer periphery of the light-transmitting portion 12c. Specifically, when the widths of the light-transmitting portions 12a, 12b, and 12c of the second shielding layer 7 are respectively set to W1, and the widths of the light-transmitting portions 11a, 11b, and 11c of the metal shielding layer 4 are respectively set to W2, W1×1.1≤W2≤W1×2.0. Therefore, when light is emitted from the light source 10, light that has passed through the light-transmitting portions 12a, 12b, and 12c of the second shielding layer 7 can pass through the light-transmitting portions 11a, 11b, and 11c of the metal shielding layer 4 without positional displacement. In addition, the area of ​​the light-transmitting portions 11a, 11b, 11c of the metal shielding layer 4 in the plane parallel to the display surface is sufficiently smaller than that of the portion without the light-transmitting portions 11a, 11b, 11c, and the light is reflected and scattered by the filler contained in the metal shielding layer 4. Therefore, it is possible to suppress the phenomenon that the layer on the back side of the metal shielding layer 4 is colored on the surface of the decorative board 1, thereby darkening the color of the decorative board 1. Thus, for example, even when a dark color is used for the second shielding layer 7, the original color of the decorative board 1 can be maintained without darkening.

[0044] The light diffusion layer 5 has the effect of uniformly diffusing and transmitting the light emitted from the light source 10. Therefore, even when a light source such as an LED (Light Emitting Diode) is used as the light source 10 to emit point light, any character, mark, or pattern-like shape 13 that emits light uniformly on the surface of the decorative plate 1 can be visually recognized regardless of the distance from the light source.

[0045] The thickness of each of the second shielding layer 7, the metal shielding layer 4 and the light diffusion layer 5 is set to be 3.5 μm or more. By setting the thickness of each of the second shielding layer 7 and the metal shielding layer 4 to be 3.5 μm or more, their shielding properties can be improved. In addition, by setting the thickness of the light diffusion layer 5 to be 3.5 μm or more, the incident light is diffused more uniformly in the layer.

[0046] The light coloring layer 6 is composed of a material that transmits light, such as a color ink or a color film. When light is emitted from the light source 10, by setting the light coloring layer 6 between the decorative board 1 and the light source 10, instead of showing the color of the warm-colored light originating from the decorative board on the surface of the decorative board, the color of any light required by the user can be shown on the surface of the decorative board. For example, with respect to the white decorative board 1, when a white light source LED is used for the light source 10, when it is desired to show white light on the surface of the decorative board, among the chromaticity values ​​in the XY chromaticity diagram of the light coloring layer 6, X is set to be greater than 0.2800 and less than 0.3300, and Y is set to be greater than 0.2800 and less than 0.3300. In addition, when it is desired to show blue light on the surface of the decorative board, among the chromaticity values ​​X and Y of the light coloring layer 6, X is set to be greater than 0.1700 and less than 0.2300, and Y is set to be greater than 0.0190 and less than 0.2310. In addition, when it is desired to display green light on the surface of the decorative board, among the chromaticity values ​​X and Y of the light coloring layer 6, X is set to be greater than 0.1290 and less than 0.3510, and Y is set to be greater than 0.4970 and less than 0.6400. In addition, when it is desired to display red light on the surface of the decorative board, among the chromaticity values ​​X and Y of the light coloring layer 6, X is set to be greater than 0.4800 and less than 0.5600, and Y is set to be greater than 0.2900 and less than 0.3270. By configuring in this way, the color of the light that the user wants to display on the surface of the decorative board can be controlled by the numerical value of the chromaticity, and can be freely displayed. The thickness of the light coloring layer 6 is set to be less than 3.5μm. This is because if the thickness of the light coloring layer 6 becomes thicker than 3.5μm, the amount of light transmitted will decrease, and the brightness when visually recognized from the surface will decrease.

[0047] The second shielding layer 7 has light-transmitting portions 12a, 12b, 12c in the shape 13 of arbitrary characters, marks, or patterns similar to the metal shielding layer 4, and is formed of a light-blocking material that does not transmit light except for the light-transmitting portions 12a, 12b, 12c.

[0048] The adhesive layer 8 is formed of a light-transmitting adhesive material such as an acrylic or epoxy adhesive.

[0049] The reinforcing layer 9 is formed of a light-transmitting transparent resin. The color of the reinforcing layer 9 may be any color as long as it transmits light, and can be freely selected by the user. An example of the reinforcing layer 9 will be described later.

[0050] On the surface of the reinforcing layer 9 on the opposite side to the adhesive layer 8, a light source 10 such as an LED (light emitting diode) is arranged at an arbitrary distance from the reinforcing layer. The light source 10 can easily control the change of color and can display full color by, for example, using a light source in which light emitting diode chips of the three primary colors of blue, red and green light are built into a single package. As another example of the light source 10, light sources other than LEDs can also be used as backlights. In addition, the light source 10 can also be buried in the surface of the reinforcing layer 9 on the side of the adhesive layer 8 or in the interior of the reinforcing layer 9, and the user can freely design it according to the use conditions. By combining the color of the light of the light source 10 and the light coloring layer 6, and further combining the color of the reinforcing layer 9, more detailed color matching can be achieved.

[0051] When the light source 10 is off, only the reflected light from the surface of the decorative panel 1 based on external light can be visually recognized through the various components on the back side of the decorative panel 1. Therefore, even if it is used for home appliance exterior or vehicle interior, only a part of it can be recognized.

[0052] By impregnating the interior of the decorative board 1 having a thickness of 0.1 mm or more and 0.6 mm or less with an organic resin, a design utilizing light transmission can be expressed even with a dark-colored resin that is generally difficult for light to pass through. Thus, when the light source 10 is turned on, any character, mark, or pattern-like shape 13 that uniformly emits light in a color selected by the user can be displayed on the surface of the decorative board 1 through light transmission.

[0053] As Figure 1BThe reinforcement layer 9 shown is shown to be made of a resin based on insert molding. However, as long as it is a component such as a resin plate or a glass plate that has both light transmittance and strength, they can be used. The resin that can be used as the resin material of the reinforcement layer 9 includes general-purpose molding resins such as PMMA resin (poly (methyl methacrylate) resin), ABS resin (acrylonitrile butadiene styrene resin), PS resin (polystyrene resin), or PC resin (polycarbonate resin). As the resin material of the reinforcement layer 9, in addition to this, it can also correspond to resins for optical purposes or super engineering resins that require molding at high temperatures. Therefore, the display device 80 using the decorative plate can also be used for lampshades, etc. Even if a general-purpose molding resin such as PMMA resin, ABS resin, PS resin or PC resin, or a resin for optical purposes or a super engineering resin is used as the resin substrate of the reinforcement layer 9, as described above, when the light source 10 is not lit, only the reflected light of the decorative plate 1 based on the external light can be seen. Furthermore, when the light source 10 is turned on, any character, mark, or pattern-like shape 13 uniformly emitting light in any color can be visually recognized on the surface of the decorative board 1 .

[0054] Through these structures, when the light source 10 is extinguished, that is, when the surface of the decorative panel 1 is visually recognized only by external light, the metal shielding layer 4 suppresses the color transmission to the surface of the decorative panel 1 caused by the second shielding layer 7 and the light coloring layer 6, so that only the color or wood grain originating from the decorative panel 1 can be visually recognized.

[0055] On the other hand, when the light source 10 is turned on, light is transmitted through the light-transmitting portions 11a, 11b, 11c of the metal shielding layer 4 and the light-transmitting portions 12a, 12b, 12c of the second shielding layer 7, while light is transmitted from the back of the decorative board 1 and the surface of the decorative board 1 is visually recognized by external light. Therefore, it is possible to visually recognize a light display portion of any character, mark, or pattern formed in the same manner as the light-transmitting portions 11a, 11b, 11c, 12a, 12b, 12c on the surface of the decorative board 1. In addition, in addition to the display portion, since the metal shielding layer 4 and the second shielding layer 7 do not transmit light from the back of the decorative board 1, only the color or wood grain originating from the decorative board 1 can be visually recognized in the state where the surface of the decorative board 1 is visually recognized by external light.

[0056] Furthermore, even when the light source is off, the color of the layer formed on the back of the decorative plate will not be transmitted to the surface of the decorative plate, and when the light source is on, a clear outline display with less blur can be performed, and the color of the transmitted light taken out can be arbitrarily controlled by the layer structure on the back of the decorative plate. That is, a display device 80 using a decorative plate can be provided, which has a decorative technology with excellent appearance design with a small line width and clear display based on the lighting using the decorative plate.

[0057] As a result, it is possible to realize a light expression performance excellent in design in accordance with the lighting and extinguishing of the light source 10 provided on the back surface of the decorative board 1 .

[0058] (Implementation Method 2)

[0059] Figure 2A , Figure 2B , Figure 2C , Figure 2D A display device 81 using the resin member 31 according to the second embodiment of the present disclosure is shown.

[0060] In the second embodiment, components having the same functions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0061] Embodiment 2 is configured as a display device 81 which has, in addition to the structure of the resin member 31 of the display device 80 of Embodiment 1, a contact input type input device 25 provided on the back surface of the decorative board 1. The light sources 14a, 14b, 14c serve as substitutes for the light source 10.

[0062] The input device 25 is composed of the light sources 14 a , 14 b , 14 c and the substrate 15 , and can detect input actions by detecting the contact or approach of a finger to the thin film layer 2 or the like on the surface side of the resin member 31 .

[0063] exist Figure 2A as well as Figure 2B In the embodiment, as the input device 25, a substrate 15 on which light sources 14a, 14b, and 14c are mounted is arranged on the surface of the reinforcing layer 9 on the side opposite to the adhesive layer 8. The substrate 15 can also be embedded in the surface of the reinforcing layer 9 on the adhesive layer 8 side or in the reinforcing layer 9, and the user can freely design it according to the use situation.

[0064] The light sources 14a, 14b, and 14c can be installed at positions where the light-transmitting portions 11a, 11b, and 11c of the metal shielding layer 4 and the light-transmitting portions 12a, 12b, and 12c of the second shielding layer 7 can transmit light. That is, the light sources 14a, 14b, and 14c do not necessarily have to be installed directly below the light-transmitting portions 11a, 11b, and 11c of the metal shielding layer 4 and the light-transmitting portions 12a, 12b, and 12c of the second shielding layer 7. For example, when the light source 14a is turned on, the light from the light source 14a passes through the reinforcing layer 9, the adhesive layer 8, the light-transmitting portion 12a of the second shielding layer 7, the light coloring layer 6, the light diffusion layer 5, the light-transmitting portion 11a of the metal shielding layer 4, the transparent substrate 3, the decorative plate 1, and the film layer 2, and a mark 16a indicating a display area is displayed on the surface of the film layer 2. The shapes of the light-transmitting portions 11a and 12a are displayed as the shapes of the mark 16a.

[0065] Furthermore, when the light source 14b is turned on, the light from the light source 14b passes through the reinforcing layer 9, the adhesive layer 8, the light-transmitting portion 12b of the second shielding layer 7, the light coloring layer 6, the light diffusion layer 5, the light-transmitting portion 11b of the metal shielding layer 4, the transparent substrate 3, the decorative plate 1 and the film layer 2, and a mark 16b indicating a display area is displayed on the surface of the film layer 2. The shape of the light-transmitting portions 11b and 12b is displayed as the shape of the mark 16b.

[0066] Furthermore, when the light source 14c is turned on, the light from the light source 14c passes through the reinforcing layer 9, the adhesive layer 8, the light-transmitting portion 12c of the second shielding layer 7, the light coloring layer 6, the light diffusion layer 5, the light-transmitting portion 11c of the metal shielding layer 4, the transparent substrate 3, the decorative plate 1 and the film layer 2, and a mark 16c indicating a display area is displayed on the surface of the film layer 2. The shape of the light-transmitting portions 11c and 12c is displayed as the shape of the mark 16c.

[0067] In addition, the design of the shape, size, number, or display position of the marks 16a, 16b, and 16c can be arbitrarily set by the user. In addition, the display is not limited to the marks 16a, 16b, and 16c, and can also be a display form of characters or numbers represented by 7 segments, which can be arbitrarily set by the user.

[0068] As light sources 14a, 14b, and 14c, similarly to Embodiment 1, by utilizing a power source that incorporates a blue, red, and green (three primary colors of light) light-emitting diode chip into a single package, it is possible to easily control the change of color, etc., and to express full color. In addition, as another example of light sources 14a, 14b, and 14c, in addition to LEDs, other light sources can also be used as backlights. In addition, light sources 14a, 14b, and 14c can also be embedded in the surface of the adhesive layer 8 side of the reinforcement layer 9, or in the interior of the reinforcement layer 9, and the user can freely design according to the use conditions. By combining the color of the light of the light sources 14a, 14b, and 14c and the color of the light coloring layer 6 and the reinforcement layer 9. Thus, more rigorous color matching can also be performed.

[0069] When a contact detection input device is used as the input device 25, at least an electrode pattern along the operation input portion is required so that when the user touches the operation input portion displayed on the surface of the film layer 2 with a finger, the position coordinates of the user's finger approaching can be detected.

[0070] The following describes an example of the operation input unit. Figure 2C as well as Figure 2DIn the embodiment, as an operation input unit, an annular recessed groove 17 is formed around the marks 16a, 16b, and 16c. The recessed groove 17 is formed by forming the shapes of annular recessed portions 18a, 18b, and 18c from the top of the film layer 2 formed on the surface of the decorative plate 1 by punching or the like. The materials and light transmittance of the film layer 2 and the decorative plate 1 are the same as those in the first embodiment.

[0071] With the above-described configuration, when a user moves a finger along the annular recessed groove 17 as an operation input portion, the input operation can be detected by the input device 25 in accordance with the amount of finger movement.

[0072] In addition, when the user operates the operation input unit with a finger, it is appropriate that the depth of the annular recessed groove 17 from the outermost surface SF of the display device 82 is greater than 1 mm and less than 20 mm, and the width W of the recessed groove 17 is greater than 3 mm and less than 30 mm. If it is within this range, the user can design freely. In Embodiment 2, as an example, the diameter D of the recessed groove 17 is 40 mm, the width W of the recessed groove 17 is 8 mm, and the depth of the recessed groove 17 is 2 mm. In addition, by making the depth of the recessed groove 17 greater than 1 mm, the user can easily feel the recessed part of the recessed groove 17. On the other hand, if the depth of the recessed groove 17 is greater than 20 mm, it is too deep and it is not easy for the user to track with a finger.

[0073] In the second embodiment, the recessed groove 17 is provided in an annular shape, but by utilizing the recessed groove in an arc shape or a straight line shape having an arbitrary length, not only the input of the rotation operation but also the sliding type linear operation can be realized. Specifically, as described above, it is characterized in that the depth from the outermost surface SF of the display device 82 is greater than 1 mm and less than 20 mm, and the width of the recessed groove is greater than 3 mm and less than 30 mm. Here, the reason is that by making the width of the recessed groove greater than 3 mm, the user can track with the fingertips, on the other hand, if the width of the recessed groove exceeds 30 mm, the bottom of the recessed groove will be captured as a plane compared to the recessed portion of the recessed groove.

[0074] By providing the recessed groove 17 in this way, the operability of the place where the user's finger is expected to slide in a contact state can be improved. Furthermore, in the second embodiment, not only can the appearance design of the decorative plate surface listed in the first embodiment be improved, but by combining the resin component 31 and the contact detection input device 25 to form the display device 82, it is also possible to provide a display device 82 with a performance that suddenly changes the display when the light source is turned on to give the user a surprise.

[0075] The contact detection input device 25 may use any detection method as long as it is a method such as an electrostatic capacitance method or a pressure sensitive method that can detect a finger contacting the touch panel.

[0076] According to the above structure, the user slides the finger along the annular recessed groove 17 as the operation input portion of the display device 81, 82 to perform the operation, and the input device 25 can detect the input operation according to the amount of sliding the finger. As a result, for example, the output volume or temperature of the audio device can be increased or decreased. In addition, by combining the resin component 31 of the display device 80 using light described in Embodiment 1 with the input device 25 to form the display device 81, 82, the following user interface with excellent appearance design can be provided, that is, when the light source is off, only a part of the exterior of the home appliance or the interior of the vehicle can be recognized, and when the light source is on, the input device 25 appears to emit light in an arbitrary shape.

[0077] (Implementation 3)

[0078] Figure 3A as well as Figure 3B A display device 83 using the resin member 31 according to Embodiment 3 of the present disclosure is shown.

[0079] In the third embodiment, components that perform the same functions as those in the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted.

[0080] In addition to the structures of Embodiments 1 and 2, Embodiment 3 further provides a light guide 19 between the light sources 14a, 14b, 14c and the reinforcing layer 9, thereby forming a display device 83 in which the light sources 14a, 14b, 14c and the light guide 19 are surrounded by a light-shielding material 20.

[0081] These structures allow the light from the light sources 14a, 14b, 14c to efficiently pass through the resin component 31, thereby reducing the brightness drop of the light when passing through each component. In other words, the life of the light sources 14a, 14b, 14c can be extended or the power consumption can be reduced, thereby reducing the heat generation.

[0082] exist Figure 3A as well as Figure 3B In the figure, the light guide 19 is arranged between the light sources 14 a , 14 b , 14 c and the reinforcing layer 9 , and is completely surrounded by the light shielding material 20 .

[0083] When the light source 14a is turned on, the light that has passed through the light guide 19 passes through the light transmission enhancement layer 9, the adhesive layer 8, the light transmission portion 12a of the second shielding layer 7, the light coloring layer 6, the light diffusion layer 5, the light transmission portion 11a of the metal shielding layer 4, the transparent substrate 3, the decorative plate 1 and the film layer 2, and a mark 16a indicating a display area is displayed on the surface of the film layer 2. The shape of the light transmission portions 11a and 12a is displayed as the shape of the mark 16a.

[0084] Furthermore, when the light source 14b is turned on, the light that has passed through the light guide 19 passes through the light transmission enhancement layer 9, the adhesive layer 8, the light transmission portion 12b of the second shielding layer 7, the light coloring layer 6, the light diffusion layer 5, the light transmission portion 11b of the metal shielding layer 4, the transparent substrate 3, the decorative plate 1 and the film layer 2, and a mark 16b indicating a display area is displayed on the surface of the film layer 2. The shape of the light transmission portions 11b and 12b is displayed as the shape of the mark 16b.

[0085] When the light source 14c is turned on, the light that has passed through the light guide 19 passes through the light transmission enhancement layer 9, the adhesive layer 8, the light transmission portion 12c of the second shielding layer 7, the light coloring layer 6, the light diffusion layer 5, the light transmission portion 11c of the metal shielding layer 4, the transparent substrate 3, the decorative plate 1 and the film layer 2, and a mark 16c indicating a display area is displayed on the surface of the film layer 2. The shape of the light transmission portions 11c and 12c is displayed as the shape of the mark 16c.

[0086] Therefore, by these structures, the light from the light sources 14 a , 14 b , and 14 c can be efficiently transmitted through the resin member 31 , and thus the decrease in brightness of the light when the light passes through each member can be reduced.

[0087] In addition, the film thickness is as follows in order from thick to thin.

[0088] Decorative board > transparent substrate > film layer > shielding layer = metal shielding layer = light diffusion layer > light color adjustment layer

[0089] In addition, the light transmittance is as follows in descending order.

[0090] Transparent substrate = film layer > decorative plate > light diffusion layer > light color adjustment layer > metal shielding layer > shielding layer

[0091] By setting such a structure, the shielding effect outside the light-transmitting part is improved. That is, it is possible to prevent any member or layer arranged on the back of the decorative plate 1 from being transmitted to the surface of the decorative plate 1 when the light source is off, and to achieve a clear outline display with less blur when the light source is on. In addition, similar to the second embodiment, in the third embodiment, the resin component 31 and the contact detection input device 25 can also be combined to form the display device 83.

[0092] According to the structures of the above-mentioned embodiments 1 to 3, when the surface of the decorative board 1 is visually recognized only by external light, the metal shielding layer 4 suppresses the color transmission to the surface of the decorative board 1 caused by the second shielding layer 7 and the light coloring layer 6, so that only the color or wood grain derived from the decorative board 1 can be visually recognized. On the other hand, when light is transmitted from the back of the decorative board 1 and the surface of the decorative board 1 is visually recognized by external light, the light is transmitted through the light-transmitting portions 12a, 12b, 12c of the second shielding layer 7 and the light-transmitting portions 11a, 11b, 11c of the metal shielding layer 4. Therefore, it is possible to visually recognize the light display portion of any character, mark, or pattern having the same shape as the transmission portion on the surface of the decorative board 1, and light other than the display portion is not transmitted from the back of the decorative board 1 to the surface through the metal shielding layer 4 and the second shielding layer 7, and only the color or wood grain derived from the decorative board 1, which is the same as the state in which the surface of the decorative board 1 is visually recognized by external light, can be visually recognized.

[0093] Furthermore, as described above, light transmission is suppressed except for the light transmission portion, so that a display device based on transmitted light with less blur and clear outlines down to the details can be provided. In addition, the light coloring layer 6 and the light diffusion layer 5 in the light transmission structure can provide a display device having a color desired by the user and emitting light uniformly on the surface of the decorative plate 1.

[0094] In addition, by appropriately combining any of the various embodiments or variations described above, the effects of each embodiment or variation can be achieved. In addition, it is possible to combine the embodiments with each other, or to combine the embodiments with each other, or to combine the embodiments with the embodiments, and it is also possible to combine the features of different embodiments or embodiments with each other.

[0095] As described above, according to the present disclosure, when the light source is off, the color of the layer formed on the back of the decorative board will not be transmitted to the surface of the decorative board, and only the original wood grain or color of the decorative board can be visually recognized. In addition, when the light source is on, light showing arbitrary characters or marks can be visually recognized on a part of the surface of the decorative board. Therefore, a display device using a decorative board that can achieve a performance of light expression with excellent appearance design can be provided.

[0096] That is, according to the present disclosure, in a state where only the first surface of the decorative board is visually recognized by external light, the metal shielding layer suppresses the color transmission to the first surface of the decorative board caused by the shielding layer and the light coloring layer, so that only the color or wood grain originating from the decorative board can be visually recognized. On the other hand, in a state where light is transmitted from the second surface of the decorative board and the first surface of the decorative board is visually recognized by external light, the light is transmitted through the transparent portion of the shielding layer and the transparent portion of the metal shielding layer, so that any character, mark, or pattern-like light display portion having the same shape as the transparent portion can be visually recognized on the first surface of the decorative board. Furthermore, in addition to the display portion, light is not transmitted from the second surface of the decorative board toward the first surface through the metal shielding layer and the shielding layer, and only the color or wood grain originating from the decorative board that is the same as the state where the first surface of the decorative board is visually recognized by external light can be visually recognized.

[0097] In addition, light transmission is suppressed except for the light transmission part, so that a display device based on transmitted light with less blur and clear outlines down to the details can be provided. In addition, the light coloring layer and the light diffusion layer in the light transmission structure can provide a display device having a color desired by the user and emitting light uniformly on the first surface of the decorative plate.

[0098] The display device using the decorative plate disclosed in the present invention can visually recognize the original texture of the decorative plate when the light source is off, and on the other hand, can realize a display that makes characters or marks with a clear outline and less blur appear with the color of light desired by the user when the light source is on. Therefore, it is possible to provide a decorative technology based on the lighting of the decorative plate with excellent appearance design, which contributes to the high functionality and high appearance design of the exterior of various home appliances or the interior of vehicles.

Claims

1. A display device using a decorative plate, comprising: A decorative board having a first surface and a second surface opposite to the first surface, and made of natural wood; a thin film layer disposed on the first surface of the decorative plate; and The transparent substrate, the first shielding layer, the light diffusion layer, the light coloring layer and the second shielding layer are arranged on the second surface side of the decorative plate. The first shielding layer is disposed closer to the decorative plate than the second shielding layer and the light color adjustment layer. In addition to the above arrangement relationship, the transparent substrate, the first shielding layer, the light diffusion layer, the light color adjustment layer and the second shielding layer are arranged in an arbitrary order. The thickness of the decorative plate, the transparent substrate, the film layer, and the second shielding layer are arranged in descending order. The second shielding layer, the first shielding layer and the light diffusion layer have the same thickness, The light diffusion layer is thicker than the light color adjustment layer, In the light transmittance measured when light from a light source is irradiated from the second surface side toward the first surface side of the decorative plate, The transparent substrate and the film layer have the same light transmittance, The order of light transmittance from high to low is the film layer, the decorative plate, the light diffusion layer, the light color adjustment layer, the first shielding layer, and the second shielding layer. The first shielding layer has a first light-transmitting portion in the shape of a character, a mark, or a pattern. The second shielding layer has a second light-transmitting portion in the shape of a character, a mark, or a pattern. When viewed from the first surface side of the decorative plate, the first light-transmitting portion is located at the same position as the second light-transmitting portion. When the light from the light source is irradiated from the second surface side of the decorative plate toward the first surface side, only the first light-transmitting portion of the first shielding layer and the second light-transmitting portion of the second shielding layer transmit light, and, The outer circumference of the first light-transmitting portion is larger than the outer circumference of the second light-transmitting portion.

2. The display device using the decorative plate according to claim 1, wherein: The light source is further provided to irradiate the light from the second surface side of the decorative plate toward the first surface side.

3. The display device using the decorative plate according to claim 1, wherein: The interior of the decorative plate is impregnated with an organic resin having a molecular weight of 100 to 50,000.

4. The display device using the decorative plate according to claim 1, wherein: The thickness of the decorative plate is greater than or equal to 0.1 mm and less than or equal to 0.6 mm. The thickness of the thin film layer is 5 μm or more and 50 μm or less, The thickness of the transparent substrate is 20 μm or more and 200 μm or less, The thickness of each of the second shielding layer, the first shielding layer, and the light diffusion layer is 3.5 μm or more. The thickness of the light tuning layer is less than 3.5 μm.

5. The display device using the decorative plate according to claim 1, wherein: Regarding the color of light that can be visually recognized on the first surface of the decorative plate when the decorative plate is allowed to transmit light, when a white LED light source is used as the light source, In the XY chromaticity diagram of the light color adjustment layer for extracting white light, among the chromaticity values ​​X and Y, X is greater than or equal to 0.2800 and less than 0.3300, and Y is greater than or equal to 0.2800 and less than 0.3300, Among the chromaticity values ​​X and Y in the XY chromaticity diagram of the light color adjustment layer for extracting blue light, X is greater than or equal to 0.1700 and less than 0.2300, and Y is greater than or equal to 0.0190 and less than 0.2310, In the XY chromaticity diagram of the light coloring layer for extracting green light, among the chromaticity values ​​X and Y, X is greater than or equal to 0.1290 and less than 0.3510, and Y is greater than or equal to 0.4970 and less than 0.6400, Among chromaticity values ​​X and Y in an XY chromaticity diagram of the light color adjustment layer for extracting red light, X is greater than or equal to 0.4800 and less than 0.5600, and Y is greater than or equal to 0.2900 and less than 0.3270.

6. The display device using the decorative plate according to claim 2, wherein: In the decorative board, when light is not emitted from the second surface side of the decorative board and the first surface of the decorative board is visually recognized by external light, only the color or wood grain derived from the decorative board can be visually recognized, In a state where light is emitted from the second surface side of the decorative board and the first surface of the decorative board is visually recognized by external light, only the first light-transmitting portion of the first shielding layer and the second light-transmitting portion of the second shielding layer transmit light, thereby making it possible to visually recognize a display portion of characters, marks, or patterns having the same shape as those of the first light-transmitting portion and the second light-transmitting portion on the first surface of the decorative board, and other than the display portion, only the color or wood grain originating from the decorative board that is the same as in a state where light is not emitted from the second surface side of the decorative board and the first surface of the decorative board is visually recognized by external light.

7. The display device using the decorative plate according to claim 1, wherein: The second shielding layer further comprises an adhesive layer on a surface opposite to the decorative plate. A light-transmitting transparency enhancing layer is provided on the back surface of the adhesive layer.

8. The display device using the decorative plate according to claim 3, wherein: The interior of the decorative plate is impregnated with a pigment, a dye, or a flame retardant.

9. The display device using the decorative plate according to claim 1, wherein: A contact detection type input device is further provided on the second surface side of the decorative panel.

10. The display device using the decorative plate according to claim 9, wherein: A ring-shaped, arc-shaped or linear concave groove is provided on the first surface of the decorative plate. The input device includes an operation input unit having an electrode pattern for detecting coordinates of a user's finger approaching along the recessed groove.

11. The display device using the decorative plate according to claim 10, wherein: The depth of the recessed groove is not less than 1 mm and not more than 20 mm. The width of the recessed groove is greater than or equal to 3 mm and less than or equal to 30 mm.

12. The display device using the decorative plate according to claim 2, wherein: It also includes: a light-transmitting transparent light guide disposed between the second surface of the decorative plate and the light source, The shapes of the first light-transmitting portion of the first shielding layer and the second light-transmitting portion of the second shielding layer are displayed on the first surface of the decorative plate by the light transmitted through the light guide.

13. The display device using the decorative plate according to claim 12, wherein: The light guide is colored.

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