JP7513180B1 - Decorative panel, display device, and display method - Google Patents

Abstract

The present invention aims to prevent the color tone of a light-transmitting decorative sheet from becoming lighter, and to prevent deterioration in the contrast and visibility of an image on a display device on the rear side.
[Solution] In the decorative panel 1, a colored transparent smoke panel 3 having a transmittance of 3% or more and 40% or less is attached to a light-transmitting decorative sheet 2. The reflected light of incident light reflected by the back surface of the decorative panel 1 is reduced. It is possible to prevent the color tone of the light-transmitting decorative sheet 2 from becoming lighter and the contrast of the image on the back surface of the display device 4 from becoming worse. Even if the light-transmitting decorative sheet 2 has low concealing properties, by combining it with the smoke panel 3, the concealing properties of the base are improved, and the influence of the difference in the color of the transparent base is reduced, thereby preventing the color tone of the light-transmitting decorative sheet 2 from changing. By reducing the concealing properties of the concealing layer, it is possible to reduce the diffuse reflection of transmitted light by the concealing layer, improving visibility.
[Selected figure] Figure 2

Description

The present invention relates to a decorative panel, a display device, and a display method.

Conventionally, a decorative sheet has been proposed in which a light-transmitting decorative sheet is placed in front of a display device to conceal the display device (see, for example, Patent Document 1). By providing the concealing layer of the light-transmitting decorative sheet with both concealing and light-transmitting properties, the display device can be concealed and an image of the display device can be projected onto the decorative panel.

JP 2022-167552 A

When the light-transmitting decorative sheet described in Patent Document 1 is used to conceal a display device and its surroundings, the light-transmitting decorative sheet is attached to a transparent plate and used in the form of a panel. However, when the light-transmitting decorative sheet is attached to a transparent plate, there are problems in that the color tone of the pattern of the light-transmitting decorative sheet becomes lighter and the contrast of the image of the display device viewed from above the decorative sheet deteriorates.

The present invention is intended to solve the above-mentioned problems, and aims to provide a decorative panel, a display device, and a display method that can prevent the color tone of the light-transmitting decorative sheet from fading and prevent the contrast and visibility of the image on the display device on the back from deteriorating.

The inventors of the present application have discovered that the reason why the color tone of the pattern becomes lighter and the contrast of the image on the display device viewed from above the decorative sheet deteriorates when a light-transmitting decorative sheet is attached to a transparent panel is that light transmitted from the front side of the light-transmitting decorative sheet is reflected at the boundary between the transparent panel placed on the back side and the air layer, illuminating the light-transmitting decorative sheet from the back side.

[1] In one aspect, the present invention provides a decorative panel that includes a light-transmitting decorative sheet and a smoke panel attached to the light-transmitting decorative sheet, the smoke panel being a colored, transparent panel with a transmittance of 3% or more and 40% or less.

In this decorative panel, a colored transparent panel smoke panel having a transmittance of 3% or more and 40% or less is attached to the light-transmitting decorative sheet. Therefore, the reflection of light transmitted from the surface of the light-transmitting decorative sheet on the back surface of the decorative panel is reduced. Therefore, it is possible to suppress the color tone of the light-transmitting decorative sheet from being lightened or the contrast of the image of the display device on the back surface from being deteriorated by being illuminated from the back surface of the light-transmitting decorative sheet. In addition, even if the light-transmitting decorative sheet has low concealing properties, by combining it with a smoke panel, the concealing properties of the base are improved, and the influence of the difference in the color of the transparent base is reduced, thereby suppressing the color tone of the light-transmitting decorative sheet from changing. As a result, it is possible to suppress the color tone of the light-transmitting decorative sheet from being lightened and the contrast of the image of the display device on the back surface from being deteriorated. Furthermore, if the concealing layer of the decorative sheet is given a certain degree of light transparency to create a decorative sheet that has both light transparency and concealment, the concealing ability of the base can be ensured even if the concealing rate of the concealing layer is reduced, so the decrease in visibility of the image on the display device on the back side caused by the concealing layer can be reduced.

[2] In the decorative panel of [1] above, the smoke panel may control the color tone of the light-transmitting decorative sheet by the color of the smoke panel. In this case, the color of the smoke panel can be used to control the light-transmitting decorative sheet to a desired color tone.

[3] In the decorative panel of [1] or [2] above, the light-transmitting decorative sheet may include a light-transmitting concealing layer. This allows the color tone and base concealing properties of the light-transmitting decorative sheet to be controlled using the concealing layer and the smoke panel.

[4] In the decorative panel of [1] or [2] above, a smoke panel may be used as the concealing layer. In this case, the concealing layer of the light-transmitting decorative sheet may be omitted.

[5] In another aspect, the present invention relates to a display device. This display device is configured by concealing a display device with any one of the decorative panels [1] to [4] above. In this case, it is possible to prevent deterioration of the contrast of the image of the display device of the display device.

[6] Another aspect of the present invention relates to a display method. In this display method, a display device is covered with any one of the decorative panels [1] to [4] above, and the RGB bias and gain of the display device are adjusted according to the color tone of the smoke panel, so that a white display appears white through the smoke panel. In this case, the color tone of the image of the display device visible from the front of the decorative panel can be adjusted.

[7] The display device is adjusted using the display method described above in [6]. In this case, the color tone of the image on the display device that can be viewed from the front of the decorative panel can be adjusted.

According to the present invention, it is possible to provide a decorative panel, a display device, and a display method that can suppress the fading of the color tone of the light-transmitting decorative sheet and suppress the deterioration of the contrast of the image on the display device on the back side. In addition, by using a smoke material as the concealing layer or as a part of it, it is possible to reduce the concealing property of the concealing layer of the sheet, and to reduce the diffuse reflection of transmitted light in the concealing layer.

FIG. 1 is a cross-sectional view that illustrates a decorative panel according to an embodiment of the present invention. FIG. 2 is a cross-sectional view that illustrates a display device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view that illustrates a display device according to a modified example. FIG. 4 is a cross-sectional view showing a schematic example of a specific structure of the design layer. FIG. 5 is a cross-sectional view that illustrates a decorative panel according to a modified example. FIG. 6 is a cross-sectional view that illustrates a decorative panel according to a modified example. FIG. 7 is a cross-sectional view that illustrates a decorative panel according to a comparative example. FIG. 8 is a cross-sectional view that illustrates a display device according to a comparative example. FIG. 9 is a cross-sectional view that illustrates a display device according to a comparative example.

Specific examples of decorative panels and display devices according to embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to these examples, but is intended to include all modifications within the scope of the claims and meaning equivalent to the claims. In the following description, the same elements in the description of the drawings will be given the same reference numerals, and duplicate descriptions will be omitted.

Fig. 1 is a cross-sectional view that shows a schematic of a decorative panel 1 according to an embodiment of the present invention. Fig. 2 is a cross-sectional view that shows a schematic of a display device 100 according to this embodiment. As shown in Fig. 1, the decorative panel 1 includes a light-transmitting decorative sheet 2 and a smoke panel 3. The display device 100 includes the decorative panel 1 and a display device 4.

The decorative panel 1 is provided in front of the display device 4, which is a light source (between the viewer and the display device 4). The display device 100 is constructed by concealing the display device 4 with the decorative panel 1. The decorative panel 1 is fully transparent to light. Therefore, when the display device 4 is powered on, the viewer can see the light from the display device 4 that has passed through the decorative panel 1, and when the display device 4 is powered off, the viewer can see the image displayed by the decorative panel 1.

The light-transmitting decorative sheet 2 is a sheet for expressing a pattern. The light-transmitting decorative sheet 2 preferably has a visible light transmittance of 10% or more and 70% or less. If the light-transmitting decorative sheet 2 does not have a concealing layer 7, the transmittance may be 70% or more. The light-transmitting decorative sheet 2 has a visible light transmittance of 10% or more, which makes it easier for light from a display device (see FIG. 4) to pass through. In this specification, the transmittance refers to the visible light transmittance value measured using, for example, a spectrophotometer (for example, a spectrophotometer UV-2100 manufactured by Shimadzu Corporation).

As shown in FIG. 2, the light-transmitting decorative sheet 2 may have a printed base material 5, a pattern layer 6, and a concealing layer 7. However, the structure of the light-transmitting decorative sheet 2 is not particularly limited as long as it is a decorative sheet that has light transparency. For example, as in the light-transmitting decorative sheet 2 of the display device 100 shown in FIG. 3, a smoke panel 3 may be substituted for the concealing layer, and the concealing layer 7 of the light-transmitting decorative sheet 2 itself may be eliminated. Note that the concealing layer 7 does not have to be a layer formed by printing, and may instead be a colored film with holes.

The printing substrate 5 is a substrate that is transparent to visible light. The printing substrate 5 is made of, for example, a transparent resin. Examples of the transparent resin include PET, PMMA, polyethylene, polypropylene, and nylon. The printing substrate 5 may be a glass substrate. The thickness of the printing substrate 5 is, for example, 25 μm to 250 μm. In the case of a glass substrate, the thickness is, for example, several mm to about 10 mm. If necessary, a surface protection layer, an anti-fingerprint layer, an anti-reflection layer, etc. may be provided on the surface side of the printing substrate 5 (the side opposite to the pattern layer 6).

The pattern layer 6 is a layer on which the pattern to be expressed by the light-transmitting decorative sheet 2 is formed. The pattern of the pattern layer 6 is a pattern that appears on the surface of the decorative sheet when the power of the display device 4 is turned off, and may be, for example, a wood grain pattern or an abstract pattern. The pattern layer 6 may be formed by printing on the printing substrate 5. Any printing method may be used for printing, such as Bravia printing, inkjet printing, screen printing, or offset printing. The material of the decorative ink used for printing may be inorganic pigments, organic pigments, or interference pigments, and any material may be used. The thickness of the pattern layer 6 is, for example, 1 μm to 100 μm.

The concealing layer 7 conceals the display device 4 when the power supply of the display device 4 is OFF, and determines the color tone of the pattern. When the pattern layer 6 is an interference pigment, the concealing layer 7 is black or gray to improve color development, but when an inorganic pigment is used, the pattern becomes difficult to see if black or gray is used. Therefore, it is preferable to use white for the concealing layer 7. When the pattern is wood grain, the concealing layer 7 can change the color tone with a brownish color.
The concealing layer 7 conceals the display device 4 together with the smoke panel 3 described later, so the concealing property of the concealing layer 7 itself may be suppressed to be low. The concealing layer 7 may be formed, for example, by printing a solid layer on the pattern layer 6. As the concealing layer 7, for example, a white solid layer may be printed. The white solid layer has the effect of controlling the color tone of the pattern and preventing the pattern from sinking into the black of the base and becoming difficult to see. The base concealing property may be reduced by lowering the printing density of the white solid printing and printing it thinly. As the concealing layer 7, for example, a black solid layer may be printed. The black solid layer has the effect of making the color development of the interference pigment easier to see and concealing the base. The base concealing property may be reduced by lowering the printing density and printing it thinly. The printing method may be any printing method, such as Bravia printing, inkjet printing, screen printing, offset printing, etc. It should be noted that a concealing layer may be partially formed on the concealing layer 7 to provide a transparent portion and a non-transparent portion. The print density of the boundary between the opaque and opaque parts may be changed in a gradational manner so that there is no clear difference. The concealing layer 7 may be a layer formed by printing, a colored film, or a colored sheet. In the same manner, a concealing layer may be formed partially on the smoke panel 3.

The smoke panel 3 may take the place of the concealing layer or the colored base material, and thus the concealing layer or the solid color layer for controlling the color tone may be eliminated from the configuration of the light-transmitting decorative sheet 2. The concealing layer 7 may be a laminate of a colored film, rather than being printed. The thinner the colored film, the higher the light transmittance. The surface of the light-transmitting decorative sheet 2 may have a topcoat layer. The surface of the printing substrate 5 may be embossed. Printing may be either front printing or back printing.

Here, an example of a specific structure of the pattern layer 6 will be described with reference to FIG. 4. The pattern layer 6 shown in FIG. 4 comprises a first color pattern layer 10 provided on one surface 4a of the printing substrate 5, and a second color pattern layer 20 provided on the first color pattern layer 10.

The first color pattern layer 10 can be provided on the surface 4a by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 4, the first color pattern layer 10 is composed of a plurality of first color dots 11. Here, "dot" means a point that is an element that constitutes a printed image, and its shape is not limited to a circle, but may be a rectangle, a polygon, or other shape. Each of the plurality of first color dots 11 includes a first color binder 12 and a plurality of first color pigment chips 13 dispersed inside the first color binder 12. The content of the plurality of first color pigment chips 13 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, assuming that the first color binder 12 is 100 parts by weight.

Examples of the first color binder 12 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, polycarbonate resins, etc. The thickness of the first color pattern layer 10 is, for example, 1 μm to 10 μm. The first color pattern layer 10 may contain a curing agent. In this case, the heat resistance of the first color pattern layer 10 and the adhesion of the first color pattern layer 10 to the printing substrate 5 can be improved.

In the first embodiment, the multiple first color pigment chips 13 are multiple color first interference pigments 14a, 14b that generate different interference light from each other. Each of the first interference pigments 14a, 14b is composed of a flake (not shown) that is transparent to visible light and a metal oxide film (not shown) that covers the flake. Light that is reflected on the surface of the metal oxide film out of the light incident on the first color pattern layer 10 from the printing substrate 5 side interferes with light that passes through the metal oxide film and is reflected on the surface of the flake, generating interference light. By adjusting the film thickness of the metal oxide film and the refractive index of the metal oxide film, interference light having a desired wavelength can be generated.

In the first embodiment, each of the first interference pigments 14a and 14b is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm or more and 60 μm or less. Here, "particle size" means the longest diameter of the particle cross section. The flakes constituting the first interference pigments 14a and 14b may be other than mica, and may be, for example, silica, alumina, glass, or polysilicate. The metal oxide film constituting the first interference pigments 14a and 14b may be other than titanium dioxide, and may be, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.

When the incident light E is incident on the first color pattern layer 10, the first interference pigments 14a and 14b generate first interference lights 15a and 15b that are different from each other. That is, the wavelengths of the first interference lights 15a and 15b are different from each other. As a result, the first interference pigments 14a and 14b exhibit a mixed color. The first interference pigments 14a and 14b are, for example, a red interference pigment (red pearl pigment) and a gold interference pigment (gold pearl pigment), respectively. In this case, the first interference lights 15a and 15b exhibit red and gold, respectively. The blending amounts of the first interference pigments 14a and 14b may be the same or different from each other.

The second color pattern layer 20 can be provided on the first color pattern layer 10 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 4, the second color pattern layer 20 is composed of a plurality of second color dots 21. Here, "dot" means a point that is an element that constitutes a printed image, and its shape is not limited to a circle, but may be a rectangle, a polygon, or other shape. Each of the plurality of second color dots 21 includes a second color binder 22 and a plurality of second color pigment chips 23 dispersed inside the second color binder 22. The content of the plurality of second color pigment chips 23 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, assuming that the second color binder 22 is 100 parts by weight.

Examples of the second color binder 22 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, polycarbonate resins, etc. The thickness of the second color pattern layer 20 is, for example, 1 μm to 10 μm. The second color pattern layer 20 may contain a hardener. In this case, the heat resistance of the second color pattern layer 20 and the adhesion of the second color pattern layer 20 to the first color pattern layer 10 can be improved.

In the first embodiment, the multiple second color pigment chips 23 are second interference pigments 24 that generate monochromatic interference light different from the mixed color represented by the first interference pigments 14a, 14b. The second interference pigment 24 is composed of a thin flake (not shown) that is transparent to visible light and a metal oxide film (not shown) that covers the flake. Light that is reflected on the surface of the metal oxide film out of the light incident on the second color pattern layer 20 from the printing substrate 5 side interferes with light that passes through the metal oxide film and is reflected on the surface of the flake, generating interference light. By adjusting the film thickness of the metal oxide film and the refractive index of the metal oxide film, interference light having a desired wavelength can be generated.

In the first embodiment, the second interference pigment 24 is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm or more and 60 μm or less. Note that here, "particle size" means the longest diameter of the particle cross section. The flakes constituting the second interference pigment 24 may be other than mica, and may be, for example, silica, alumina, glass, or polysilicate. The metal oxide film constituting the second interference pigment 24 may be other than titanium dioxide, and may be, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.

When the incident light E is incident on the second color pattern layer 20, the second interference pigment 24 generates a monochromatic second interference light 25. As a result, the second interference pigment 24 exhibits a monochromatic color. The second interference pigment 24 may be any interference pigment that generates a monochromatic second interference light 25 different from the mixed color exhibited by the first interference pigments 14a and 14b, and may be, for example, a green interference pigment (green pearl pigment). In this case, the second interference light 25 exhibits green color.

In the pattern layer 6, the pattern is expressed by additively mixing the first interference light 15a, 15b generated by the first interference pigments 14a, 14b and the second interference light 25 generated by the second interference pigment 24.

As shown in FIG. 1, the smoke panel 3 has the function of attenuating light from the front side of the viewpoint that passes through the light-transmitting decorative sheet 2. The smoke panel 3 is placed on the back side of the light-transmitting decorative sheet 2. In the display device 100, the smoke panel 3 is placed on the front side of the display device 4. The smoke panel 3 is a colored transparent panel having a predetermined transmittance. The transmittance of the smoke panel 3 may be 3% or more, and may further be 18% or more. The transmittance of the smoke panel 3 may be 40% or less, and may further be 28% or less. The lower the transmittance, the more the backside reflected light can be reduced. Therefore, if the brightness of the display device 4 installed on the backside is high, it is better to lower the transmittance of the smoke panel 3.

The smoke panel 3 may be a smoke plate 30 in which the plate-like member itself is a smoke member (see FIG. 1). Materials for such a smoke plate 30 may include, for example, transparent resins such as acrylic, polycarbonate, and PVC, as well as glass. The thickness of the smoke plate 30 is not particularly limited, but may be, for example, 1 mm or more and 5 mm or less.

Alternatively, the smoke panel 3 may be a smoke film 31 that can be attached to a transparent plate (see Figs. 5 and 6). For example, PP, PET, PMMA, etc. may be used as the material for the smoke film 31. In the example shown in Fig. 5, the smoke film 31 is attached to the back surface of the transparent plate 32. In the example shown in Fig. 6, another transparent plate 33 is placed on the back surface of the smoke film 31 on the back surface of the transparent plate 32. Also, laminated glass with the smoke film 31 sandwiched between them may be used, but the reflected light will be greater than when a smoke film 31 with the same transmittance is attached to the back surface. For the same transmittance, the reflected light can be reduced by using a smoke plate 30 such as smoked acrylic rather than using a transparent plate 32 with a smoke film 31 attached to the back surface.

The smoke panel 3 is colored. The color of the smoke panel 3 is not particularly limited, and any color may be used, such as gray, brown, or blue. The method of coloring the smoke panel 3 is not particularly limited. For example, the smoke panel 3 may be produced as a colored transparent panel by incorporating a color-imparting substance such as a pigment or dye into the material of the transparent panel and forming it into a plate shape. When a thin colored layer is printed instead of the smoke film, a printing method such as screen printing, inkjet printing, gravure printing, or offset printing may be used. Note that the smoke panel 3 may be of various colors, and may be the color of a preferred wall, so the color is not limited.

The smoke panel 3 may control the color tone of the light-transmitting decorative sheet 2 by the color of the smoke panel 3. For example, when the display device 4 is OFF, the pattern of the pattern layer 6 of the light-transmitting decorative sheet 2 is visible from the front side of the display device 100. At this time, the color tone of the pattern of the pattern layer 6 is controlled by the color of the smoke panel 3. For example, if the color of the smoke panel 3 is brown and the pattern of the pattern layer 6 is wood grain, a brownish wood grain can be seen from the front side of the display device 100.

The lower the transmittance of the smoke panel 3, the greater the effect of reducing reflected light, but it is preferable to optimize the transmittance of the smoke panel 3, taking into consideration the brightness of the display device 4, etc. The thickness of the smoke panel 30 may be reduced by cutting a part of it, but since the transmittance of that part will change, if the color tone changes, it is preferable to match the color tone with a black sheet or paint. The display device 4 may be installed and buried in the surrounding wall 9, or may be installed behind an opening in the wall 9. If there is a gap between the wall 9 and the display device 4, it is preferable to make the back of the wall 9 sufficiently dark so that light does not leak. If the smoke panel 3 affects the color tone of the image of the display device 4, it is preferable to adjust the color tone by adjusting the RGB gain and bias of the display device 4. By adjusting the RGB bias and gain of the display device 4 of the display device 100 according to the color tone of the smoke panel 3, a white display may be made to look white through the smoke panel 3.

The method for adhering the light-transmitting decorative sheet 2 and the smoke panel 3 is not particularly limited, and transparent double-sided tape, OCA, tape, heat fusion, etc. may be used. When heat fusion is used, a film may be laminated on the printed layer. The color of the wall 9 surrounding the display device 4 may be any color as long as it does not affect the color tone of the light-transmitting decorative sheet 2, but if it is affected by the color of the base, it is preferable to use a color similar to the color of the display that does not transmit the image. When a further concealing layer is partially added to the back of the concealing layer 7 of the light-transmitting decorative sheet 2, the same concealing ink may be printed at a higher concentration, or a black or gray film or sheet may be attached.

Next, the functions and effects of the decorative panel 1, display device 100, and display method according to this embodiment will be described.

First, a decorative panel 200 and a display device 300 according to a comparative example will be described with reference to Figures 7 and 8. As shown in Figure 7, the decorative panel 200 according to the comparative example includes a light-transmitting decorative sheet 2 and a transparent plate 32, and does not include a smoke panel 3. As shown in Figure 8, the display device 300 according to the comparative example covers the display device 4 with the decorative panel 200.

In the decorative panel 200, when the back surface of the transparent plate 32 is an air layer as shown in Figs. 7 and 8, the incident light LIN incident from the front surface of the light-transmitting decorative sheet 2 is reflected by the back surface of the transparent plate 32. As a result, the reflected light LOUT1 at the air layer interface illuminates the light-transmitting decorative sheet 2 from the back surface, and the color tone of the light-transmitting decorative sheet 2 becomes lighter. In addition, when the display device 4 is ON, if the image LIMG1 of the display device 4 passes through the decorative panel 200, there is a problem that the contrast of the image LIMG1 deteriorates. Furthermore, in the light-transmitting decorative sheet 2 with high base concealment, the image LIMG of the display device 4 is projected by the concealing layer 7 (projected image LIMG2). Therefore, when viewed from an oblique angle, the image appears double and blurred due to the influence of the image LIMG1b directed obliquely and the projected image LIMG2, which causes a problem of poor visibility. On the other hand, if the concealment properties of the light-transmitting decorative sheet 2 are reduced, there is a problem in that the underlying material will be visible.

In contrast, in the decorative panel 1 according to the present embodiment, a colored transparent smoke panel 3 having a transmittance of 3% or more and 40% or less is attached to the light-transmitting decorative sheet 2. Therefore, the reflected light LOUT1 of the incident light LIN incident from the front surface of the light-transmitting decorative sheet 2 and reflected by the rear surface of the decorative panel 1 is reduced. Therefore, it is possible to suppress the lightening of the color tone of the light-transmitting decorative sheet 2 and the deterioration of the contrast of the image LIMG1 of the display device 4 on the rear surface caused by illumination from the rear surface of the light-transmitting decorative sheet 2. In addition, even if the light-transmitting decorative sheet 2 has low concealing properties, by combining it with the smoke panel 3, the concealing properties of the base are improved, and the influence of the difference in the color of the transparent base is reduced, thereby suppressing the change in the color tone of the light-transmitting decorative sheet 2. As a result, it is possible to suppress the lightening of the color tone of the light-transmitting decorative sheet 2 and the deterioration of the contrast of the image LIMG1 of the display device 4 on the rear surface. Furthermore, if the concealing layer 7 of the decorative sheet is given a certain degree of light transparency to create a decorative sheet that has both light transparency and concealment, the concealing properties of the base are ensured even if the concealing rate of the concealing layer 7 is reduced, so the decrease in visibility of the image on the display device 4 on the back side caused by the concealing layer 7 can be reduced.

In the decorative panel 1, the smoke panel 3 may control the color tone of the light-transmitting decorative sheet 2 by the color of the smoke panel 3. In this case, the color of the smoke panel 3 can be used to control the light-transmitting decorative sheet 2 to a desired color tone.

The decorative panel 1 may include a light-transmitting decorative sheet 2 and a concealing layer 7. This allows the color tone of the light-transmitting decorative sheet 2 to be controlled using the concealing layer 7 and the smoke panel 3.

In the decorative panel 1, the smoke panel 3 may be used as a concealing layer. In this case, the concealing layer 7 of the light-transmitting decorative sheet 2 can be omitted.

The display device 100 is configured by concealing the display device 4 with the decorative panel 1 described above. In this case, deterioration of the contrast of the image on the display device 4 of the display device 100 can be suppressed.

The display method is to cover the display device 4 with the decorative panel 1 described above, and adjust the RGB bias and gain of the display device 4 according to the color tone of the smoke panel 3, so that the white display appears white through the smoke panel 3. In this case, the color tone of the image of the display device 4 visible from the front of the decorative panel 1 can be adjusted.

The display device 100 is adjusted by the display method described above. In this case, the color tone of the image on the display device 4 that can be seen from the front of the decorative panel 1 can be adjusted. For example, in the case of brown smoke, white that appears reddish can be made to appear whiter by lowering the R gain and bias values in the display settings.

As mentioned above, the decorative panel 200 according to the comparative example has a problem that the image is blurred when viewed from an oblique angle. If the concealing layer 7 reflects light from the display device 4 diffusely, the image is formed on the concealing layer 7. In particular, when the concealing layer 7 is white, light is likely to be diffusely reflected. When an interference pigment is used, the concealing layer 7 is formed in black to improve color development, so diffuse reflection is less likely to occur compared to a white concealing layer. In the decorative panel 200 in which the concealing layer 7 has a weak concealing property and the base is visible through, the image of the display device 4 is not projected through the concealing layer 7, so that the image is not seen doubly through the display device 4 and the concealing layer 7, and the display does not appear blurred through the decorative panel 200 even when viewed from an oblique angle. However, because the concealing property is weak, the display device 4 and its surroundings are visible through the decorative panel 200, and the base cannot be concealed. In contrast, the decorative panel 1 of this embodiment combines a light-transmitting decorative sheet 2, which has low concealment properties and through which the image from the display device 4 is transmitted without being projected onto the surface, with a smoke panel 3, so that the image is not blurred when viewed from an angle due to a double image being seen on the display device 4 and the light-transmitting decorative sheet 2, and the base is concealed, and reflected light LOUT1 reflected on the back side of the decorative panel 1 is prevented from illuminating the light-transmitting decorative sheet 2 from behind.

[Comparative Example 1]
A specific comparative example 1 will be described with reference to FIG. 8. In comparative example 1, a 75 μm PET resin was used as the printing substrate 5, a wood grain pattern picture layer 6 was printed on the reverse side, and a solid white layer was printed on the reverse side to form a concealing layer 7. The solid white layer controlled the color tone of the picture and concealed the base, and a light-transmitting decorative sheet 2 was obtained by printing it at a thickness such that the transmittance of the light-transmitting decorative sheet 2 was 17%. A transparent acrylic plate with a transmittance of 90% or more was attached as a transparent plate 32 to the back side of the light-transmitting decorative sheet 2, and a decorative panel 200 was produced. The decorative panel 200 was attached to a gray-colored wall 9 around the display device 4, and the display device 4 installed on the wall 9 and the gray-colored wall 9 around it were concealed. Even if the light-transmitting decorative sheet 2 has a base concealing property, when a transparent plate 32 is used as the base to transmit light, the incident light LIN incident through the sheet is reflected at the interface between the transparent plate 32 and the air layer, and illuminates the light-transmitting decorative sheet 2 from the back side. Therefore, the color tone becomes whitish and the pattern becomes light. When a wall 9 of a gray color with a color adjustment is adhered to the back side of the transparent plate 32, the reflected light LOUT2 becomes bright, so that it can be made to be the same as the reflected light LOUT1 reflected at the interface with the air layer on the back side of the transparent plate 32, and the difference in color tone can be eliminated. However, due to the reflected light LOUT1 and LOUT2, the color tone of the light-transmitting decorative sheet 2 becomes whitish overall, and the contrast of the image of the display device through the light-transmitting decorative sheet 2 decreases. In Comparative Example 1, unlike Comparative Example 2 described later, there is no difference in color tone between the image display part 35 and the surrounding parts, but the color tone becomes light overall (see FIG. 8(b)). In addition, since the light-transmitting decorative sheet 2 has a high concealing property, the image LIMG1 of the display device 4 is projected onto the concealing layer 7, and when viewed from an oblique angle, the image LIMG1b from the display device and the projected image LIMG2 projected onto the concealing layer 7 are seen as a double image, and the image appears blurred.

[Comparative Example 2]
A specific comparative example 2 will be described with reference to FIG. 9. Comparative example 2 is similar to comparative example 1, except that the display device 4 installed on the wall 9 and the black wall 9 around it are concealed. When the black wall 9 is adhered to the back side of the transparent plate 32, the reflected light LOUT2 becomes dark, and there is a difference in brightness between the reflected light LOUT1 reflected at the interface with the air layer on the back side of the transparent plate 32. Therefore, there is a difference in color tone between the light-transmitting decorative sheet 2 to which the black wall 9 is adhered and the light-transmitting decorative sheet 2 at the part facing the display device 4. As a result, the image display portion 35 stands out in a light color tone (see FIG. 9(b)). Since the color tone of the image display portion 35 appears different, the presence of the display device 4 cannot be concealed as a result. Other problems are similar to those of comparative example 1.

[Example 1]
A specific example 1 will be described with reference to FIG. 2. In example 1, a 75 μm PET film was used as the printing substrate 5, and a pattern layer 6 was printed on the back using an inorganic pigment with a wood grain pattern, and a white solid layer was printed on the back to form a concealing layer 7. The white solid layer has the effect of controlling the color tone of the pattern and preventing the pattern from sinking into the black of the base and becoming difficult to see. The printing density of the white solid printing was reduced and printed thinly to reduce the base concealment, and a light-transmitting decorative sheet 2 with a transmittance of 25% was obtained. A brown smoked acrylic plate with a transmittance of 28% was attached to the back side of the light-transmitting decorative sheet 2 as a smoke panel 3, to produce a decorative panel 1. The decorative panel 1 was attached to the black wall 9 surrounding the display device 4 installed on the wall 9, and the display device 4 installed on the wall 9 and the black wall 9 around it were concealed. A liquid crystal monitor with a brightness of 700 cd was used as the display device 4. By combining with brown smoke acrylic, the base concealment was improved, and even with a light-transmitting decorative sheet 2 with low base concealment, the display device 4 and the surrounding wall 9 could be concealed by the light-transmitting decorative sheet 2. In addition, by using a brown smoke acrylic plate, it was possible to prevent the color tone of the pattern from becoming dark even if the printing density of the solid white of the concealing layer 7 was reduced. Since the smoke acrylic plate has a small reflection of the incident light LIN, it suppresses the light-transmitting decorative sheet 2 from being illuminated from the back, so the color tone does not become lighter, and no difference in color tone was seen between the part attached to the black wall 9 and the image display part 35 facing the display device 4. In addition, by using brown smoke as the smoke panel 3, the color tone was not blacker than when gray smoke was used. Since the surface of the light-transmitting decorative sheet 2 did not become whitish, the image of the display device 4 could be seen with high contrast through the sheet. In addition, because the concealing property of the light-transmitting decorative sheet 2 is low, the image of the display device 4 is not projected onto the concealing layer 7, and even when viewed from an oblique angle, the image LIMG1b from the display device 4 and the image projected onto the concealing layer 7 do not appear double, causing the image to be blurred. The reflected light LOUT2 of the incident light LIN reflected by the black wall 9 and the reflected light LOUT1 of the incident light LIN reflected by the interface with the air layer of the smoke panel 3 are almost equal, and there is no visible difference in color tone between the two, so the image display portion 35 does not appear bright.

[Example 2]
A specific example 2 will be described with reference to FIG. 2. In example 2, a 75 μm PET resin was used as the printing substrate 5, a wood grain patterned picture layer 6 was printed on the back using an interference pigment, and a black solid layer was printed on the back to form a concealing layer 7. The black solid layer has the effect of making the color of the interference pigment more visible and concealing the base. The print density was lowered and thin printing was performed to reduce the base concealing property, and a light-transmitting decorative sheet 2 with a transmittance of 60% was obtained. A gray smoked acrylic plate with a transmittance of 18% and a thickness of 3 mm was attached to the back side of the light-transmitting decorative sheet 2 as a smoked panel 3 to produce a decorative panel 1. The decorative panel 1 was attached to the black wall 9 surrounding the display device 4 installed on the wall 9, and the display device 4 installed on the wall 9 and the black wall 9 surrounding it were concealed. The smoked acrylic plate and the light-transmitting decorative sheet 2 were combined to increase the base concealing property, and even the light-transmitting decorative sheet 2 with low base concealing property was able to conceal the display device 4 and the surrounding wall 9. The smoked acrylic plate has a small reflection of the incident light LIN, so it suppresses the light-transmitting decorative sheet 2 from being illuminated from the back, so the color tone does not become lighter, and no difference in color tone is seen between the part attached to the black wall 9 and the image display part 35 facing the display device 4. In addition, the color tone can be suppressed from becoming lighter as in Comparative Example 1. In addition, the use of gray smoke for the smoked acrylic improves the color development of the interference pigment. In addition, since the concealing layer 7 of the light-transmitting decorative sheet 2 has a low concealing property and is black in color, the image LIMG1 of the display device 4 is not projected onto the concealing layer 7, and even when viewed from an angle, the image LIMG1b from the display device 4 and the image projected onto the concealing layer 7 are not doubled and the image is not blurred. The reflected light LOUT2 of the incident light LIN reflected by the black wall 9 and the reflected light LOUT1 reflected at the interface with the air layer of the smoked panel 3 are almost equal, and no difference in color tone is seen between the two, so the image display part 35 does not appear bright.

[Example 3]
A specific example 3 will be described with reference to Fig. 3. Example 3 is obtained by omitting the concealing layer 7 from Example 2. In Example 3, since the light-transmitting decorative sheet 2 does not have the concealing layer 7, the image LIMG1 from the display device 4 is not projected onto the concealing layer 7, and even when viewed from an oblique angle, the image LIMG1b from the display device 4 and the image projected onto the concealing layer 7 are not doubled and the image is not blurred. Other effects are the same as in Example 2, but by eliminating the concealing layer 7, the image from the image of the display device 4 can be made brighter.

The decorative panel, display device, and display method according to the present invention are not limited to the above-described embodiments, and various other modifications are possible.

For example, the second color pattern layer may include a first interference pigment of multiple colors that generate different first interference lights, and the first color pattern layer may include a second interference pigment that generates a single-color second interference light that is different from the mixed color exhibited by the multiple first interference pigments. Also, in each of the above embodiments, the first color pigment chip is a first interference pigment of two colors, but the first color pigment chip may be a first interference pigment of three or more colors.

1...decorative panel, 2...light-transmitting decorative sheet, 3...smoke panel, 4...display device, 7...concealing layer, 100...display device.

Claims (7)

A light -transmitting decorative sheet;
A smoke panel attached to the light-transmitting decorative sheet;
The smoke panel is a colored transparent panel having a transmittance of 3% or more and 40% or less;
The light-transmitting decorative sheet has a pattern layer on which a pattern is expressed by printing with a light-transmitting decorative ink,
When the display device is ON, the image from the display device is transmitted through the optical fiber, so that the image can be viewed;
When the display device is turned off, the decorative panel allows the pattern displayed by the decorative panel to be viewed, thereby concealing the presence of the display device. The decorative panel according to claim 1, wherein the smoke panel controls the color tone of the light-transmitting decorative sheet by the color of the smoke panel. The decorative panel according to claim 1, wherein the light-transmitting decorative sheet includes a light-transmitting concealing layer. The decorative panel according to claim 1, in which the smoke panel is a concealing layer. A display device, comprising the decorative panel according to any one of claims 1 to 4, and configured to conceal the presence of a display device. A display device is covered with the decorative panel according to any one of claims 1 to 4,
A display method in which a white display appears white through the smoke panel by adjusting RGB bias and gain of the display device according to the color tone of the smoke panel. A display device adjusted by the display method according to claim 6.

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