JP2023047316A - Decorative flakes and display device having the same - Google Patents

Abstract

To provide decorative flakes capable of concealing a structure positioned on a back side when there is no light irradiation on the back side, allowing a light display positioned on the back side to be visually recognized on a viewing side when there is light irradiation on the back side, and suppressing blurring of display on the viewing side.SOLUTION: Decorative flakes include a thin substrate having light-transmission properties, a decorative layer constituting a surface on a viewing side of the thin substrate and having light-transmission properties, and a light-transmission adjustment layer constituting a surface on a back side opposite to the viewing side. The light-transmission adjustment layer has a total light beam transmittance of 3% to 50% and haze of 50% to 99%.SELECTED DRAWING: Figure 4

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative thin article, and more particularly to a decorative thin article capable of backlighting, and a display device provided with the decorative thin article.

BACKGROUND ART Conventionally, decorative thin materials that can be backlit are used for electric appliances, automobile parts, and the like. The outer surface of the decorative thin article has a pattern-shaped translucent part such as characters and figures and a light-shielding part around it. When the decorative thin article is illuminated from behind with a light source, only the translucent part transmits light, and the pattern shape of the translucent part is visually recognized. The pattern shape is not visible unless illuminated by a light source from behind.

As this type of decorative thin material that can be backlit, there is a decorative thin material described in Patent Document 1, for example. FIG. 8 is a cross-sectional view showing a conventional backlit decorative sheet (Patent Document 1). As shown, the decorative thin article has a light-transmitting portion 1 and a light-shielding portion 2 adjacent to the light-transmitting portion. In the peripheral region of the light-transmitting portion 1, a light-shielding layer 9 and a colored light-transmitting layer 8 are sequentially laminated from the viewing side on the surface of the molded product.

Japanese Patent Application Laid-Open No. 2001-347539

In the decorative thin object of Patent Document 1, the pattern of the translucent part 1 stands out when illuminated from behind by the light source 3, but when not illuminated by the light source from behind, the pattern is the same as the surrounding light shielding part. , the existence of which becomes invisible, and the design of the surface of the molded product can be improved. However, even when there is no light irradiation on the back side of the decorative thin material, the structure including the light source on the back side may be seen through the transparent part from the viewing side due to the lighting on the viewing side. . Furthermore, there is a demand for making the optical display on the back side of the decorative thin object visible on the viewing side, not limited to the pattern shape formed on the translucent portion. Therefore, in the conventional decorative thin article that can be backlit, the structure located behind is hidden when there is no light irradiation on the back side, and the structure located on the back side is hidden when there is light irradiation on the back side. There is room for improvement from the viewpoint of making the optical display visible on the viewing side and suppressing blurring of the display on the viewing side.

Therefore, an object of the present disclosure is to solve the above-mentioned problems, by hiding a structure located behind when there is no light irradiation on the back side, and when there is light irradiation on the back side, To provide a decorative thin object capable of making an optical display positioned at a viewing side visible on the viewing side and suppressing blurring of the display on the viewing side.

In order to achieve the above object, the decorative thin article according to the present disclosure includes a light-transmitting thin substrate and a light-transmitting decorative layer constituting the surface of the thin substrate on the viewing side. and a light transmission adjusting layer forming a rear surface opposite to the viewing side, wherein the light transmission adjusting layer has a total light transmittance of 3% to 50% and a haze of 50% to 99. %.

In this specification, the term “thin” refers to a state in which the thickness is thin, that is, a state in which the thickness is much smaller than the planar dimensions, and the term “thin” refers to materials and applications. Regardless, it is a general term for thin objects, and includes, for example, sheets, films, panels, and the like.

According to the present disclosure, in the decorative thin article, when there is no light irradiation on the back side, the structure located on the back side can be hidden, and when there is light irradiation on the back side, the light located on the back side can be hidden. The display can be viewed on the viewing side, and blurring of the display on the viewing side can be suppressed.

FIG. 3 is an image cross-sectional view showing concealment (a) of a structure located on the rear side and visual recognition of the optical display on the rear side (b) by a decorative thin material provided with a dimming layer having a high light absorption rate. Concealment (a) of a structure located behind and visibility (b) of an optical display on the back side by a decorative thin article in which a diffuse reflection translucent layer having both translucency and diffuse reflectivity is arranged on the viewing side It is an image cross-sectional view showing the. Concealment of a structure located behind (a) and visual recognition of an optical display on the back side by a decorative thin article having a diffuse reflection translucent layer having both translucency and diffuse reflectivity disposed on the back side (a) It is an image cross-sectional view showing the. 1 is an image cross-sectional view of a display device (Example 1) including a decorative thin object according to Embodiment 1 of the present disclosure; FIG. FIG. 10 is an image cross-sectional view of a display device including a decorative thin object according to Embodiment 2 of the present disclosure; FIG. 10 is an image cross-sectional view of a display device including a decorative thin object according to a comparative example of the present disclosure; A diagram showing an example of light display on the viewing side by the display device (a1-c1) provided with the decorative thin material of Example 1 and the display device (a2-c2) provided with the decorative thin material of the comparative example. is. FIG. 2 is a cross-sectional view showing a conventional backlit decorative sheet.

According to the first aspect of the present disclosure, a light-transmitting thin substrate, a decorative layer forming the surface of the thin substrate on the viewing side, and a light-transmitting decorative layer and the rear side opposite to the viewing side and a light transmission adjusting layer constituting the surface of the decorative thin article, wherein the light transmission adjusting layer has a total light transmittance of 3% to 50% and a haze of 50% to 99%. I will provide a.

According to this aspect, when there is no light irradiation on the back side of the decorative thin article, the structure located on the back side can be hidden, and when there is light irradiation on the back side, the light display located on the back side can be visually recognized on the viewing side, and blurring of display on the viewing side can be suppressed.

According to the second aspect of the present disclosure, the light transmission adjustment layer includes a light diffusion reflection layer and a smoke layer, the light diffusion reflection layer has a higher total light transmittance than the smoke layer, and the smoke layer to provide a decorative foil according to the first aspect, having a haze higher than

According to the third aspect of the present disclosure, the light diffusion reflection layer contains a polarizing pearl pigment, has a total light transmittance of 70% to 99%, and has a haze of 50% to 99%. To provide the decorative thin material described in .

According to a fourth aspect of the present disclosure, the decoration according to any one of the first to third aspects, wherein the decorative layer is composed of a plurality of layers laminated in a direction perpendicular to the thin substrate. Offer flakes.

According to the fifth aspect of the present disclosure, either one or both of the decorative layer and the light transmission adjusting layer are directly integrally formed on the surface of the thin substrate, or thinly formed via an intermediate layer. A decorative sheet according to any one of the first to fourth aspects is provided which is bonded to a substrate.

According to a sixth aspect of the present disclosure, the decorative thin article according to any one of the first to fifth aspects and an optical display device are provided, and the optical display device is configured to display the decorative thin article by light irradiation. To provide a display device for optical display on the back side of an object.

By appropriately combining any of the various embodiments described above, the respective effects can be obtained.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid unnecessary verbosity in the following description and to facilitate understanding by those skilled in the art.

The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure and are not intended to limit the claimed subject matter thereby. Also, in each drawing, each element is exaggerated for ease of explanation.

<Circumstances leading to the present invention>
First, the process leading to the present invention will be described with reference to FIGS. 1 to 3. FIG.

A light-attenuating layer with a high light absorption rate is used to prevent the structure located behind from being seen through the translucent part from the visible side by the lighting on the visible side of the decorative thin material. can be considered. FIG. 1 is an image cross-sectional view showing (a) concealment of a structure located on the rear side and (b) visual recognition of the light display on the rear side by a decorative thin material 10a having a light-attenuating layer with a high light absorption rate. is. As shown in FIG. 1(a), the decorative thin article 10a comprises a transparent decorative layer 11a and a light-reducing layer 12a having a high light absorptivity, from the viewing side F toward the back side B. and a translucent base 13a are laminated in this order. As a result, when there is no light irradiation on the rear side, the light from the illuminating body 20a on the viewing side F is absorbed by the dimming layer 12a, and only a small amount of light passes through the substrate 13a. It is possible to conceal the structure 30a to be used.

In this case, however, as shown in FIG. Attenuation occurs, so the power of the light source must be increased. In particular, when a large optical display such as a monitor on the rear side is viewed on the viewing side F, problems of power consumption and heat generation become serious as the required output of the light source increases.

In order to solve the problem shown in FIG. 1(b), the inventors considered adopting a diffusely reflective translucent layer that has both translucency and diffuse reflectivity. FIG. 2 shows (a) concealment of a structure located behind and light display on the back side by a decorative thin material in which a diffuse reflection translucent layer having both translucency and diffuse reflectivity is arranged on the viewing side. It is an image sectional view showing visual recognition (b). As shown in FIG. 2(a), the decorative thin object 10b includes a light-transmitting decorative layer 11b, a diffuse reflection light-transmitting layer 12b, and a light-transmitting layer 11b from the viewing side F toward the rear side B. A substrate 13b having properties is laminated in order. As a result, when there is no light irradiation on the rear side, part of the light emitted from the illumination body 20b on the viewing side F and reaching the diffuse reflection translucent layer 12b is diffusely reflected. Even if it is transmitted through the base 13b, the structure 30b located on the back side B becomes difficult to see through the decorative thin object 10b from the viewing side F, and the structure 30b is hidden while maintaining a certain level of translucency. can do.

However, as shown in FIG. 2B, when the optical display 35b included in the structure 30b located on the rear side B is visually recognized on the viewing side F, the optical display 35b is separated from the position of the optical display 35b on the rear side B. Since the diffuse reflection light-transmitting layer 12b is arranged at the position, the optical display is visually displaced from the original position when viewed from the viewer on the viewing side F due to the diffuse reflection of light by the diffuse reflection light-transmitting layer 12b. An optical path is generated. Specifically, for example, the light from the light display position S1 on the back side B reaches the diffuse reflection translucent layer 12b along the optical path P1, is diffusely reflected by the diffuse reflection translucent layer 12b, and is polarized. It reaches the eyes of the viewer along the optical path P2. In this specification, in order to simplify the explanation, the change of the optical path at the interface of each layer included in the decorative thin article due to refraction of light is not taken into consideration. At this time, since the diffuse reflection light-transmitting layer 12b is away from the light display position S1 and is arranged on the viewing side of the substrate 13b, the light along the optical path P1 passes through the optical path O1 perpendicular to the surface of the substrate 13b. It reaches the diffuse reflection light-transmitting layer 12b at a large distance. As a result, the deflected optical path P2 forms an angle β1 with the optical path O1 and reaches the viewer's eye, and the viewer moves from the original optical display position to the position S2 on the extension line of the deflected optical path P2. The image of the light display in S1 is visually recognized. The position S2 is greatly displaced from the original optical display position S1, and the image of the optical display at the original optical display position S2 and the image of the optical display at the original optical display position S1 overlap. In this way, when a large number of images of optical display at different positions are stacked, an entirely blurred display will be viewed on the viewing side F. FIG.

In order to avoid the problem shown in FIG. 2(b), the present inventors studied how to improve the visibility of the optical display on the back side of the decorative thin object.

FIG. 3 shows (a) concealment of a structure located on the back side and light display on the back side by a decorative thin material in which a diffuse reflection translucent layer having both translucency and diffuse reflectance is arranged on the back side. It is an image sectional view showing visual recognition (b). As shown in FIG. 3(a), the decorative thin object 10c includes, from the viewing side F toward the rear side B, a light-transmitting decorative layer 11c, a light-transmitting substrate 13c, a diffusion The reflective translucent layer 12c is laminated in order. The decorative thin material 10c having such a configuration emits light from the illuminating body 20c on the viewing side F when there is no light irradiation on the rear side, similarly to the decorative thin material 10b of FIG. 2(a). As a result, part of the light that has reached the diffuse reflection translucent layer 12c is diffusely reflected. It becomes difficult to see through the decorative thin object 10c, and the structure 30c can be concealed while maintaining a certain level of translucency.

Next, as shown in FIG. 3(b), when the optical display 35c included in the structure 30c located on the rear side B is viewed on the viewing side F, the light from the optical display is diffuse reflection translucent. Although diffusely reflected by the layer 12b, by arranging the diffuse reflection light-transmitting layer 12c in the vicinity of the optical display 35c on the back side B, the optical display will not deviate from its original position as seen from the viewer on the viewing side F. can be suppressed. Specifically, for example, the light from the light display position T1 on the rear side B reaches the diffuse reflection translucent layer 12c along the optical path Q1, is diffusely reflected by the diffuse reflection translucent layer 12c, and is polarized. It reaches the eyes of the viewer along the optical path Q2. At this time, since the diffuse reflection translucent layer 12c is arranged behind the substrate 13b and in the vicinity of the optical display 35c, the light along the optical path Q1 is emitted from the optical path O1 orthogonal to the surface of the substrate 13b. It reaches the diffuse reflection light-transmitting layer 12c without being far apart. As a result, the angle β2 formed by the deflection optical path Q2 and the optical path O1 is much smaller than the angle β1 shown in FIG. 2(b). A viewer visually recognizes an image of the optical display originally at the optical display position T1 at the position T2 on the extension line of the deflection optical path Q2. Since the position T2 does not deviate greatly from the position T1, the stacking of optical display images at different positions is reduced, and blurring of the display on the viewing side F can be suppressed. In this way, the inventors found a configuration of a decorative thin article that suppresses blurring of display on the viewing side by changing the arrangement of the diffuse reflection light-transmitting layer, and completed the present invention.

Further, in this configuration, the decorative layer 11c and the diffuse reflection translucent layer 12c are arranged with the substrate 13c interposed therebetween. By forming the decorative layer 11c on the viewing side F, the design applied to the decorative layer 11c can be visually recognized, and the design of the decorative thin article can be utilized.

A display device having a decorative thin article according to an embodiment of the present disclosure will be described below with reference to FIGS. 4 and 5. FIG.

(Embodiment 1)
FIG. 4 is an image cross-sectional view of a display device 500a including a decorative thin article according to Embodiment 1 of the present disclosure. A display device 500a shown in FIG. The optical display device 30 may include a light emitter (not shown) and a display portion 32 . When the display unit 32 is in the "ON" state, the display device 500a causes the optical display 35 located on the rear side B of the decorative thin object 100a to be visually recognized on the visual recognition side F of the decorative thin object 100a, and the display unit 500a 32 is switched to the "OFF" state, the entire optical display device 30 located on the rear side B can be hidden.

(Structure of decorative thin object 100a)
As shown in FIG. 4, the decorative thin object 100a provided in the display device 500a includes a light-transmitting decorative layer 101 and a light-transmitting thin layer 101 from the viewing side F toward the rear side B. A substrate 106 and a light transmission adjustment layer 102 having both light transmission properties and diffuse reflection properties are laminated in this order.

The decorative layer 101 has translucency and can be composed of a plurality of layers laminated in a direction perpendicular to the surface of the thin substrate. In this embodiment, the decorative layer 101 is composed of a printed layer 105 for expressing a decorative pattern and a hard coat layer 104 for protecting the surface of the visible side F of the entire structure. The printed layer 105 may be directly printed on the visible side of the light-transmitting thin substrate 106, and the hard coat layer 104 may be laminated and integrated with the printed layer 105 by thermal vacuum lamination. Moreover, the decorative layer 101 of the present disclosure is not limited to this. For example, the decorative layer 101 may further include an uneven tactile layer for providing a tactile sensation, or a decorative layer that exhibits various decorative effects such as wood grain patterns, matte surfaces, metal surfaces, and the like.

In addition, the printing layer 105 is preferably formed by an inkjet printing method, which facilitates ensuring translucency and high printing resolution, but other printing methods such as a screen printing method and a gravure printing method may be used. The hard coat layer 104 may be composed of a plurality of layers such as an ultraviolet blocking layer, an anchor layer, and an adhesive layer, depending on the requirement to protect the entire structure.

The shape of the thin substrate 106 may be a flat plate shape or a three-dimensional shape. Materials for the thin substrate 106 include polycarbonate resin, polyethylene terephthalate resin, acrylic resin, and the like, all of which have translucency. The thin substrate 106 provides support for the decorative layer 101 and the light transmission adjusting layer 102, and can ensure the required strength of the decorative thin article 100a as a whole.

In addition, in the present embodiment, the thin substrate 106 has a thickness of 0.5 mm or more, more preferably 1 mm or more and 5 mm or less. Further, for example, in the decorative thin article 100a shown in FIG. % or more and less than 100%. Thus, by providing a thin substrate having a predetermined thickness, a decorative thin object having self-supporting properties and a certain strength can be constructed, and can be easily assembled into a display device.

In this embodiment, the light transmission adjustment layer 102 is composed of a light diffusion reflection layer 107 and a smoke layer 108. The light diffusion reflection layer 107 and the smoke layer 108 are arranged from the rear side B of the thin substrate 106. It may be formed by lamination printing by a screen printing method. Further, in the present embodiment, the light diffuse reflection layer 107 and the smoke layer 108 are configured in the stacking order shown in FIG. The smoke layer 108 may be configured in a reverse stacking order.

The light diffusion reflection layer 107 can be composed of, for example, a layer containing a polarized pearl pigment. Pearl pigments include thin plate-like fine particles having a coating layer made of a high refractive index material such as titanium dioxide on the surface of scale-like fine particles of mica (mica), and have both diffuse reflectivity and translucency of light. . Pearlescent pigments include, for example, white pearlescent pigments, interference pearlescent pigments or colored pearlescent pigments. The present disclosure does not limit the type or coloration of the pearl pigment included in the light diffuse reflection layer 107 . The smoke layer 108 can be composed of, for example, a layer containing smoke pigment, and is used to adjust the light transmittance throughout the decorative thin material 100a. In this embodiment, the light diffusion reflection layer 107 has a higher total light transmittance than the smoke layer 108 .

Further, in the present invention, haze is used as an indicator of transparency. Haze is the degree of fogging, and represents the degree of transparency of transparent materials such as glass, plastics, and liquids. . Therefore, a lower haze value means less diffuse light transmission and a less haze material. In this embodiment, the light diffusion reflection layer 107 has a higher haze value than the smoke layer 108 .

The light diffusion reflection layer 107 with a thickness of 20 to 30 μm, the smoke layer 108 with a thickness of 5 to 20 μm, and the light transmission adjustment layer 102 obtained by stacking the light diffusion reflection layer 107 and the smoke layer 108 are each having a thickness of about A measurement sample prepared by printing on a 188 μm transparent PET film for measurement was used to measure light transmission characteristics and haze. Measurement was performed using a haze meter NDH 7000SP II (Nippon Denshoku Industries), and the results of total light transmittance according to JIS K 7361-1 (ISO 13468-1) and haze according to JIS K 7136 (ISO 14782) were displayed. 1.

As shown in Table 1, the light diffusion reflection layer 107 has a total light transmittance of 70% to 99% and a haze of 50% to 99%. As a result of adjusting the light transmittance with the smoke layer 108, the light transmission adjusting layer 102 has a total light transmittance of 3% to 50% and a haze of 50% to 99%. With the light transmission adjusting layer 102 configured in this manner, the decorative thin article 100a of the present embodiment hides the entire optical display device 30 positioned on the rear side when the rear side is not irradiated with light. , the optical display 35 located on the rear side can be visually recognized on the viewing side F when there is light irradiation on the rear side.

The thickness of the light transmission adjusting layer 102 can generally be configured from several micrometers to several tens of micrometers depending on the purpose. In this embodiment, the light transmittance through the entire decorative thin article 100a is about 10%.

In this embodiment, the optical display device 30 of the display device 500a is arranged on the rear side B of the decorative thin article 100a. The light emitter provided in the optical display device 30 may be a general light source for illumination, or a light emitting device such as an LED or a laser. The display unit 32 may be, for example, a high-brightness monitor, and may be switched between "ON" and "OFF" by the operation of a light emitter. When the display unit 32 is in the "ON" state, the optical display 35 is displayed on the rear side B of the decorative thin article 100a by light irradiation from the light emitter.

As described above, by arranging the light transmission adjustment layer 102 in the vicinity of the optical display 35 located on the rear side, blurring of the display on the viewing side F can be suppressed. Preferably, the distance between the light transmission adjusting layer 102 and the light display 35 positioned on the rear side B of the decorative thin article 100a is 5 mm or less.

In addition, the decorative layer 101 and the light transmission adjusting layer 102 of the decorative thin article of the present disclosure may be integrally formed on the surface of the thin substrate 106 and bonded to the thin substrate 106 via an intermediate layer. may be

(Embodiment 2)
FIG. 5 is an image cross-sectional view of a display device 500b including a decorative thin article according to Embodiment 2 of the present disclosure. 5, the same reference numerals are used for the same components as in FIG. 4, and description thereof is omitted.

(Structure of decorative thin article 100b)
As shown in FIG. 5, a decorative thin material 100b provided in a display device 500b includes a light-transmitting decorative layer 101 and a light-transmitting thin material 101, similarly to the decorative thin material 100a shown in FIG. and a light transmission adjusting layer 102 having both light transmission properties and diffuse reflection properties.

In this embodiment, the decorative layer 101 includes a printed layer 105 expressing a decorative pattern, a hard coat layer 104 protecting the surface of the decorative thin object 100b on the viewing side F, and a thin substrate 106. A first insert film 301 that is insert-molded on the viewing side F is configured. The printed layer 105 is directly printed on the first insert film 301, and the hard coat layer 104 is laminated and integrated with the printed layer 105 by thermal vacuum lamination.

The light transmission adjustment layer 102 of the decorative thin article 100b is composed of a light diffusion reflection layer 107, a smoke layer 108, and a second insert film 302 insert-molded on the rear side B of the thin substrate 106. It is The light diffusion reflection layer 107 and the smoke layer 108 can be laminated and printed on the second insert film 302 by screen printing.

The first insert film 301 and the second insert film 302 are made of a material such as polycarbonate resin, polyethylene terephthalate resin, acrylic resin, etc., and are translucent.

In this embodiment, the decorative layer 101 and the light transmission adjusting layer 102 are bonded to the thin substrate 106 via the first insert film 301 and the second insert film 302, respectively. The present disclosure is not so limited. For example, one of the decorative layer 101 and the light transmission adjusting layer 102 may be laminated directly on the surface of the thin substrate 106 and the other may be bonded to the thin substrate 106 via an insert film.

According to the display device 500a or the display device 500b configured as described above, when the display section 32 is in the "OFF" state, the optical display device 30 located on the back side B of the decorative thin article 100a or 100b is displayed. When the entire display is concealed and the display unit 32 is in the "ON" state, the optical display 35 located on the rear side B can be viewed from the viewing side, and blurring of the display on the viewing side can be suppressed.

(Example 1 and Comparative Example)
Next, the display device 500a provided with the decorative thin material 100a shown in FIG. 4 is used as Example 1, and the display device 600 provided with the decorative thin material 300 shown in FIG. was placed in the vicinity of the optical display located behind the decorative thin object, the effect of suppressing blurring of the display on the viewing side F was verified.

FIG. 6 is an image cross-sectional view of a display device 600 including a decorative thin article 300 according to a comparative example of the present disclosure. In addition, in FIG. 6, the same reference numerals are used for the elements having the same configuration as in FIG. A decorative thin material 300 of a display device 600 shown in FIG. It has a thin substrate 106 and a light transmission adjusting layer 102 having both light transmission properties and diffuse reflection properties. The decorative thin material 100 a of Example 1 and the decorative thin material 300 of the comparative example differ in the arrangement of the light transmission adjusting layer 102 . As shown in FIG. 6, the light transmission adjusting layer 102 of the decorative thin object 300 is arranged to be joined to the decorative layer 101 on the visible side of the thin substrate 106 away from the optical display 35 located on the rear side. It is In this verification, the structure and thickness of each layer corresponding to Example 1 and the comparative example are the same, and the optical display device 30 is arranged so that the optical display 35 is in contact with the back surface of the decorative thin material. was done.

FIG. 7 shows the viewing side of the display device 500a (a1-c1) equipped with the decorative thin material 100a of Example 1 and the display device 600 (a2-c2) equipped with the decorative thin material 300 of the comparative example. FIG. 10 is a diagram showing a display in F; When the thickness of the thin substrate 106 is set to 1.0 mm (a1, a2), 2.0 mm (b1, b2), and 3.0 mm (c1, c2), each of Example 1 and Comparative Example The verification results are shown in FIG. As shown in the figure, when the display device 600 including the decorative thin article 300 of the comparative example was used (a2-c2), the display on the viewing side F was blurred. Further, as the thickness of the thin substrate 106 increased, the blurring of the display on the viewing side F became more pronounced. On the other hand, when the display device 500a including the decorative thin article 100a of Example 1 is used (a1-c1), blurring of display is improved on the viewing side F, and clearer display is obtained. rice field. It was confirmed that blurring of the display on the viewing side F was suppressed by arranging the light transmission adjusting layer 102 of the decorative thin material in the vicinity of the optical display 35 positioned on the rear side.

The present invention is not limited to the above-described embodiments, but can be modified in various ways within the scope of the claims, and can be obtained by appropriately combining technical means disclosed in different embodiments. Embodiments are also included in the technical scope of the present invention.

According to the decorative thin material that can be backlit according to the present invention, when the optical display on the back side is OFF, the structure on the back side is hidden, and when the optical display is ON, the structure is displayed on the viewing side. blurring is suppressed, and clear display can be visually recognized. INDUSTRIAL APPLICABILITY The present invention can be widely applied as a decorative panel that has a seamless design and texture that blends into the space in the fields of on-vehicle parts, home electric appliances, household goods, etc., and whose optical display is visible only when necessary.

30 optical display device 32 display unit 35 optical display 100a, 100b, 300 decorative thin material 101 decorative layer 102 light transmission adjusting layer 104 hard coat layer 105 printing layer 106 thin substrate 107 light diffusion reflection layer 108 smoke layer 301, 302 Insert film 500a, 500b, 600 Display device

Claims (6)

a translucent thin substrate;
a light-transmitting decorative layer constituting the surface of the thin substrate on the viewing side;
a light transmission adjusting layer forming a surface on the back side opposite to the viewing side;
with
The light transmission adjusting layer is
a total light transmittance of 3% to 50% and a haze of 50% to 99%;
Decorative foil. The light transmission adjustment layer includes a light diffusion reflection layer and a smoke layer,
The light diffuse reflection layer has a total light transmittance higher than that of the smoke layer and a haze higher than that of the smoke layer.
The decorative sheet according to claim 1. The light diffusion reflection layer contains a polarizing pearl pigment, has a total light transmittance of 70% to 99%, and has a haze of 50% to 99%.
The decorative thin article according to claim 2. The decorative layer is composed of a plurality of layers laminated in a direction orthogonal to the thin substrate,
The decorative thin article according to any one of claims 1 to 3. Either one or both of the decorative layer and the light transmission adjusting layer are directly formed integrally with the surface of the thin substrate, or bonded to the thin substrate via an intermediate layer. ,
The decorative thin article according to any one of claims 1 to 3. The decorative thin article according to any one of claims 1 to 3;
an optical display device;
with
The optical display device performs optical display on the back side of the decorative thin article by irradiating light.
display device.

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