JP2009083375A - Decorative panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative panel which enables light illumination display of the ornamental patterns, in arbitrary colors, formed on a substrate of optical transmission nature using the visible range light and is attractive in appearance with full of varieties. <P>SOLUTION: Ornamental patterns 12 are so constructed by arranging numerous microreflective sections 121 continuously along the rear surface 11b of the substrate 11 on the rear surface 11b of the substrate 11. The numerous microreflective sections 121 are formed by concave reflectors 121a which presents three-dimensional shape of triangular roofing, and give light and darkness of light to the ornamental patterns 12 generating light and darkness of 1/f fluctuation to the radiance of light reflected by these concave reflectors 121a, furthermore, by reflecting the specific colors of light, which are specified based on the refractive index and the thickness of optical ornamentation diaphragm 13 and separated by optical ornamentation diaphragm 13 among from the incoming incident ray permeating the interface of the concave reflectors 121a of numerous microreflective sections 121 and the optical ornamentation diaphragm 13, on to the microreflective sections 121, the ornamental patterns 12 are color shaded in accordance with the light and darkness of the above light. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a decorative panel used for decoration of an instrument panel for a vehicle or decoration of a door surface of a furniture or a panel of a drawer, decoration of a surface of a mobile phone body, decoration of a surface of an electrical appliance, and the like. The present invention relates to a decorative panel in which a decorative pattern formed on a light-transmitting substrate can be brightly displayed with an arbitrary color using colored light in a visible region.

As a conventional decorative panel, for example, an automotive decorative panel, a garnish that is mounted between rear combination lamps at the rear end of a passenger car is known (see Patent Document 1).
This type of decorative panel includes a cover made of a transparent synthetic resin material such as acrylic and an attachment base material for attaching the cover to a car body of an automobile, and the outer surface of the cover is processed into a smooth surface. At the same time, a fine concavo-convex pattern (texture) is formed on the inner surface facing the mounting substrate. In addition, a concave spherical fisheye is formed on the surface of the mounting substrate opposite to the inner surface of the cover, and a silver metallic paint is applied to the concave spherical fisheye to form a metallic coating surface. Form.

In such a decorative panel, the light transmitted through the cover is complicatedly scattered by the fine uneven pattern (texture) on the inner surface of the cover, and when this scattered light is incident on the metallic coating surface of the mounting base, By the action of the concave mirror that comes from the fish-eye shape, the reflection disturbance of the incident light becomes an integrated reflected light, which can provide a decorative panel that can express the depth of depth with the effect of a Fresnel lens I have to.
JP-A-4-78632

  However, such a conventional decorative panel has a cover having a fine concavo-convex pattern and a mounting base material having a metallic coating film surface formed by applying a silver metallic paint to a concave spherical fish eye formed on the surface facing the cover. Is suitable for passenger car garnishes, etc., but is used for decoration of vehicle instrument panels, furniture door surfaces, drawer end panels, mobile phone body surfaces, etc. It is not suitable for decorative panels. This is because the decorative panel has a structure in which the cover and the mounting base material are arranged opposite to each other with a space therebetween, so that the decorative panel itself cannot be made thin and thin, and the number of components of the decorative panel increases, resulting in high cost. There is a problem of becoming.

  In addition, the metallic coating surface of the mounting base material constituting the conventional decorative panel is formed of a concave spherical concave mirror, and the reflected light that is scattered by the concave / convex pattern of the cover by the concave mirror is collected, that is, the concave mirror. Since it is reflected as spot light having a diameter corresponding to the size, the brightness of the spot-like reflected light is almost uniform, and the brightness of the spot light does not change even when the viewpoint is changed with respect to the decorative panel. As a result, there has been a problem that the decorations of automobile interior parts such as instrument panels and door rims and decorations of electrical appliances are hardly changed and the appearance is low.

  The present invention has been made to solve the above-described conventional problems. The decorative pattern formed on the light-transmitting substrate can be displayed in a bright color with an arbitrary color using light in the visible region, and can be changed. It is intended to provide a decorative panel that enables an optical decoration that is rich in appearance and acts on the visual perception of the viewer, and that can exhibit an optical decoration effect that provides healing, relaxation, or comfort. .

  In order to achieve the above object, the invention of claim 1 is a decorative panel, comprising a transparent plate-like substrate having a decorative pattern on a surface opposite to a surface on which light is incident, A surface opposite to the light incident surface and an optical decoration film for coloring formed on at least the decoration pattern of the decoration pattern, the decoration pattern on the light incident side being an interface with the optical decoration film A large number of micro-reflecting parts formed on the surface opposite to the surface are arranged continuously along the opposite surface, and the many micro-reflecting parts reflect incident light incident on the substrate. Alternatively, the optical decoration film is formed of a three-dimensional reflecting surface that gives light and darkness of light to the decorative pattern by causing light and darkness of 1 / f fluctuations in the brightness of the light that is transmitted and reflected. The light passing through the interface between the reflecting surface of the reflecting portion and the optical decoration film. Of the light incident on the decorative film, characterized by being configured the decorative pattern by reflecting direct light of a particular color to the minute reflecting portion so as to color display in accordance with the brightness of the light.

  Invention of Claim 2 is a panel for decoration, Comprising: The transparent or opaque plate-shaped base material which has a decoration pattern in one surface, One surface of the said base material, and the said decoration pattern on the said decoration pattern An optical decorative film for coloring formed on the surface, and the decorative pattern has a plurality of minute reflecting portions formed on one surface of the base material that is an interface with the optical decorative film on the one surface. The plurality of micro-reflecting portions are configured to reflect or transmit incident light that is transmitted through the optical decoration film and incident on the base material, and the luminance of the reflected light is 1 / F is formed by a three-dimensional reflecting surface that causes light and darkness of fluctuations to light and darken the decorative pattern, and the optical decorative film has a specific color out of incident light incident on the optical decorative film. The light is reflected in the direction opposite to the base material to Characterized in that the pattern has been configured to color display in accordance with the brightness of the light.

  A third aspect of the present invention is the decorative panel according to the first or second aspect, wherein the optical decorative film is formed by alternately laminating a plurality of low-refractive thin film layers and high-refractive thin film layers. By changing the refractive index and film thickness of the thin film layer, light of a specific color is reflected and light of other colors is transmitted.

  According to a fourth aspect of the present invention, in the decorative panel according to the first or second aspect, the micro-reflecting portion is along the surface opposite to the light incident side surface or one surface of the base material. It is characterized by exhibiting a concave or convex three-dimensional shape such as a triangular shape, a trapezoidal shape, a hemispherical shape, a semi-elliptical spherical shape, and a wave shape that are continuously formed at an arbitrary pitch in a two-dimensional direction.

  According to a fifth aspect of the present invention, in the decorative panel according to the first aspect, a translucent or transparent decorative layer having a decorative pattern is formed on the surface on the light incident side of the substrate. It is characterized by that.

  The invention of claim 6 is the decorative panel according to claim 1 or 2, characterized in that the substrate is a colored transparent material.

  According to the decorative panel of the present invention, a decorative pattern is configured by continuously arranging a number of micro-reflecting portions along the opposite surface on the surface opposite to the light incident side surface of the substrate, and By forming a large number of micro-reflecting parts with a three-dimensional reflecting surface, the brightness of the light reflected by the three-dimensional reflecting surface is caused to have a brightness of 1 / f fluctuation, thereby making the decorative pattern light and dark. In addition, of the incident light that passes through the interface between the three-dimensional reflecting surface of the micro-reflecting part and the optical decoration film and enters the optical decoration film, light of a specific color is incident on the micro-reflecting part with the optical decoration film. By reflecting the light, the decoration pattern is displayed in shades of light and dark according to the brightness of the light, so that the decoration pattern formed on the base material can be displayed in any color using light in the visible region. The decoration pattern is rich in changes due to 1 / f fluctuations. It allows for good-looking optical decoration, to act on the vision of those who look at the same time, healing, relaxation, or can exhibit optical decorative effect of the peace.

  Further, according to the decorative panel of the present invention, a decorative pattern is formed by continuously arranging a large number of minute reflecting portions along one surface of one surface of a transparent or opaque plate-like substrate. In addition, by forming a large number of micro-reflecting portions with a three-dimensional reflecting surface, the brightness of the light reflected by the three-dimensional reflecting surface is caused to have a brightness of 1 / f fluctuation and light on the decorative pattern. In addition, by reflecting light of a specific color out of the incident light incident on the optical decoration film in the direction opposite to the base material, the decorative pattern is colored to a light and dark color that matches the lightness of the light. Since it is displayed, the decorative pattern formed on the base material can be displayed in any color using light in the visible region, and the decorative pattern can be displayed in a variety of 1 / f fluctuations. Enables a good optical decoration, along with the viewer's vision To use, healing, relaxation, or can exhibit optical decorative effect of the peace.

  Moreover, according to the decorative panel of the present invention, since the decorative layer having a pattern is formed on the light incident side surface of the base material, the reflected light generated by the micro-reflecting part is formed on the pattern of the decorative layer. 1 / f fluctuation light brightness and darkness can be added, thereby giving a three-dimensional effect to the decorative pattern and providing a more attractive decorative panel.

  Further, according to the decorative panel of the present invention, the appearance of the decorative panel can be emphasized in terms of color by molding the base material with a colored transparent material.

Next, an embodiment of a decorative panel according to the present invention will be described with reference to the drawings. The decorative panel of the present invention is not limited to the embodiment described below.
(Embodiment 1)
1 is a plan view of a decorative panel showing a first embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along line 2-2 of FIG. 1, and FIG. 3 is an optical diagram of the decorative panel according to the first embodiment. FIG. 4 is a partially enlarged perspective view showing an example of the micro-reflecting portion when viewed from the back side of the substrate after removing the decorative film, FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. 3, and FIG. FIG. 6 is an enlarged cross-sectional view taken along line 5-5, and FIG. 6 is a cross-sectional view schematically showing the action of the micro-reflecting part and the optical decorative film of the decorative panel in Embodiment 1 on light.

As shown in FIGS. 1 and 2, the decorative panel 10 shown in the first embodiment is a plate-like base material having a constant thickness made of a transparent synthetic resin material such as acrylic or polycarbonate, or a transparent material such as glass. 11 is provided. On the back surface 11b, which is the surface opposite to the light incident side surface (front surface) 11a of the base material 11, a decorative pattern 12 formed by designing a morpho butterfly, for example, is formed. On the back surface 11b of the base material 11 including the optical decoration film 13 for color display of the entire decorative panel 10 including the decorative pattern 12 is formed.
The illumination light 15 of the decorative panel 10 is light from various illumination lamps or natural light such as sunlight.

  As shown in FIGS. 1 and 2, the decorative pattern 12 includes a large number of minute reflecting portions 121 formed on the back surface 11 b of the base material 11 that is an interface with the optical decorative film 13 along the back surface 11 b of the base material 11. It is composed by arranging them continuously. The large number of minute reflecting portions 121 reflect or transmit incident light incident on the base material 11, and produce 1 / f fluctuation brightness in the brightness of the reflected light to add light brightness to the decorative pattern 12. It is formed of a three-dimensional reflecting surface 121a having a triangular roof shape. The optical decoration film 13 is a specific light determined by the optical decoration film 13 out of incident light that passes through the interface between the reflecting surface 121a of the micro-reflecting part 121 and the optical decoration film 13 and enters the optical decoration film 13. By reflecting the colored light toward the minute reflecting portion 121, the decorative pattern 12 is configured to be colored and displayed according to the brightness of the light.

  As shown in FIG. 6, the optical decoration film 13 is configured by laminating a plurality of, for example, 5 to 10 low refractive thin film layers 131 and high refractive thin film layers 132 alternately. Such an optical decoration film 13 reflects light of a specific color by changing the refractive index and film thickness of the laminated thin film layers 131 and 132, and transmits light of other colors. .

Next, a specific example in the case where the brightness of the reflected light generated by the micro-reflecting unit 121 is changed irregularly will be described with reference to FIGS.
As shown in FIG. 3, the micro-reflecting portion 121 has a triangular roof-type basic shape, and by giving 1 / f fluctuation to the basic shape, as shown in FIG. 4 and FIG. It is composed of a concave reflecting surface 121a which is formed in a three-dimensional shape and is continuous in a plane. The concave reflecting surface 121a causes the brightness due to the reflection to cause irregularity of light and darkness similar to the sunbeams or the flow of water in the creek, and the shape thereof is 1 / f fluctuation function f (x ).
That is, the concave reflecting surface 121a which is determined by the 1 / f fluctuation function f (x), a plurality of sine curves with different frequencies: ^{(amplitude 2 -i)} appropriate coefficient ² -i to ⁽² i x Frequency) It becomes the shape which added over. When this is represented in a graph, a curve 711 shown in FIG. 7 is obtained. Reference numeral 712 indicates a plurality of sine curves having different frequencies.

  As shown in FIGS. 3 to 5, the micro-reflecting portions 121 are continuously arranged in a row and column direction at a predetermined fixed interval L (0 <L <10 mm), and each row adjacent to each other is arranged. The minute reflecting portions 121c are arranged with a shift of 1L in the column direction. The depth h of the concave reflecting surface 121a is set in a range of 0 ≦ h ≦ 20 mm. Further, when the material is polycarbonate, the reflection angle θ1 of the concave reflection surface 121a is about 40 degrees, and the inclination angle θ2 of the concave reflection surface 121a is set in a range of 0 ≦ θ2 ≦ 90 °.

  In the decorative panel 10 shown in the first embodiment, as shown in FIG. 2, when the light incident side surface (surface) 11 a of the substrate 11 is irradiated with the illumination light 15, the illumination light 15 As shown in FIG. 6, the incident light 15a travels through the substrate 11 and reaches a large number of micro-reflecting parts 121. Then, a part of the incident light 15a reaching the minute reflecting portion 121 is a base material as indicated by an arrow 15b according to the shape of the concave reflecting surface 121a of the minute reflecting portion 121 determined by the 1 / f fluctuation function f (x). 11 is reflected toward the surface 11a side. Accordingly, the brightness of the reflected light 15b emitted from the surface 11a of the base material 11 causes a light / dark pattern that changes irregularly according to the 1 / f fluctuation function f (x), and chromatic aberration due to the shift of the light wavelength. Cause it to occur.

  Of the incident light 15c that is incident on the optical decoration film 13 through the interface between the concave reflection surface 121a of the large number of minute reflection parts 121 and the optical decoration film 13, the refractive index and the film thickness of the optical decoration film 13 are determined. The specific color light, for example, the light corresponding to the blue wavelength, is separated by the optical decoration film 13 and reflected toward the minute reflection portion 121. Thereby, as shown in FIG. 1, the decoration pattern 12 formed by designing a morpho butterfly is displayed on the surface of the decorative panel 10. Then, the decorative pattern is a light and dark color in which the brightness of light irregularly changing according to the concave reflecting surface 121a of the minute reflecting portion 121 constituting the decorative pattern 12 and the light color separated by the optical decorative film 13 are combined. 12 is colored.

According to the decorative panel 10 shown in the first embodiment as described above, a large number of micro-reflecting portions 121 are provided on the back surface 11b opposite to the front surface 11a on the light incident side of the base material 11. The concave reflection surface 12a is formed by continuously arranging along the back surface 11b, and a large number of minute reflection portions 121 are formed by the concave reflection surface 121a having a triangular roof-shaped three-dimensional shape. The brightness of the light reflected by the light 121a is caused to have a brightness of 1 / f fluctuations to make the decorative pattern 12 light bright and dark, and the interfaces between the concave reflective surfaces 121a of the many micro-reflecting parts 121 and the optical decorative film are formed. Of the incident light that is transmitted and incident on the optical decoration film 13, light of a specific color determined by the refractive index and the film thickness of the optical decoration film 13 is separated by the optical decoration film 13 and reflected toward the micro-reflection portion 121. By making the decoration 12 is configured so as to be colored in a light and dark color that matches the brightness of the light, so that the decorative pattern 12 formed on the base material 11 can be brightly displayed in an arbitrary color using light in the visible region. , Optical decoration that allows the decorative pattern 12 to be changed by 1 / f fluctuation and has a good appearance, and also acts on the visual perception of the viewer of the decorative panel 10 to give healing, relaxation, or comfort. A decorative effect can be exhibited.
(Embodiment 2)
Next, a second embodiment of the decorative panel according to the present invention will be described with reference to FIGS.

  FIG. 8 is a partially enlarged perspective view showing another example when the micro-reflecting part is viewed from the back side of the base material by removing the optical decorative film of the decorative panel in the second embodiment, and FIG. FIG. 10 is an enlarged cross-sectional view taken along line 8-8 of FIG. 8, and FIG. 10 is an enlarged cross-sectional view taken along line 10-10 of FIG.

As shown in FIG. 8, the decorative panel 20 shown in the second embodiment includes a plate-like base material 21 having a certain thickness made of a transparent synthetic resin material such as acrylic or polycarbonate, or a transparent material such as glass. . On the back surface 21b opposite to the light incident side surface (front surface) 21a of the base material 21, a decorative pattern 22 formed by designing a morpho butterfly, for example, is formed. Further, as shown in FIGS. 9 and 10, an optical decorative film 23 for coloring and displaying the entire decorative panel 20 including the decorative pattern 22 is formed on the back surface 21 b of the base material 21 including the surface of the decorative pattern 22. ing.
The illumination light 15 of the decorative panel 20 is light from various illumination lamps or natural light such as sunlight.

  As shown in FIGS. 9 and 10, the decorative pattern 22 includes a large number of minute reflecting portions 221 formed on the back surface 21 b of the base material 21 that is an interface with the optical decorative film 23 along the back surface 21 b of the base material 21. It is composed by arranging them continuously. The large number of minute reflecting portions 221 reflect or transmit incident light incident on the base material 21 and cause 1 / f fluctuation brightness in the brightness of the reflected light to add light to the decorative pattern 22. It is formed of a trapezoidal roof type three-dimensional reflecting surface 221a. The optical decoration film 23 is a specific color determined by the optical decoration film 23 out of the incident light that passes through the interface between the reflection surface 221a of the micro-reflecting part 221 and the optical decoration film 23 and enters the optical decoration film 23. The decorative pattern 22 is colored and displayed according to the brightness of the light by reflecting the light toward the minute reflecting portion 221.

  As in the case shown in FIG. 6, the optical decoration film 23 is configured by alternately laminating a plurality of, for example, 5 to 10 low refractive index thin film layers and high refractive index thin film layers. Such an optical decoration film 23 reflects light of a specific color by changing the refractive index and film thickness of the laminated thin film layer, and transmits light of other colors.

Next, a specific example in the case where the brightness of the reflected light generated by the minute reflection unit 221 is irregularly changed will be described with reference to FIGS. 9 and 10.
As shown in FIG. 9, the micro-reflecting portion 221 has a trapezoidal roof basic shape, and by giving 1 / f fluctuation to the basic shape, as shown in FIGS. It is comprised from the concave reflective surface 221a which was modeled by the three-dimensional shape and continued planarly. The concave reflecting surface 221a causes the brightness due to the reflection to cause irregularities of light and darkness similar to the sunbeams or the flow of water in the creek, and the shape thereof is 1 / f fluctuation function f shown in the above equation (1). It is determined from (x).
That is, the concave reflecting surface 221a which is determined by the 1 / f fluctuation function f (x), a plurality of sine curves with different frequencies: ^{(amplitude 2 -i)} appropriate coefficient ² -i to ⁽² i x Frequency) It becomes the shape which added over.

  As shown in FIGS. 8 to 10, the micro-reflecting portions 221 are continuously arranged in a row and a column direction at a predetermined fixed interval L (0 <L <10 mm), and each row adjacent to each other is arranged. The minute reflecting portions 221c are arranged with a shift of 1L in the column direction. Further, the depth h of the concave reflecting surface 221a is set in a range of 0 ≦ h ≦ 20 mm. Further, when the material is polycarbonate, the reflection angle θ1 of the concave reflection surface 221a is about 40 degrees, and the inclination angle θ2 of the concave reflection surface 221a is set in a range of 0 ≦ θ2 ≦ 90 °.

  In the decorative panel 20 shown in the second embodiment, as shown in FIGS. 9 and 10, when the light incident side surface (surface) 21 a of the base material 21 is irradiated with the illumination light 15, The illumination light 15 becomes incident light 15a as in the case of the first embodiment, travels through the base material 21, and reaches a large number of minute reflection portions 221. Then, a part of the incident light 15a that has reached the minute reflecting portion 221 is on the surface 21a side of the substrate 21 according to the shape of the concave reflecting surface 221a of the minute reflecting portion 221 determined by the 1 / f fluctuation function f (x). Reflected to. Accordingly, the brightness of the reflected light 15b emitted from the surface 21a of the base material 21 causes a light / dark pattern that changes irregularly according to the 1 / f fluctuation function f (x), and chromatic aberration due to the shift of the light wavelength. Cause it to occur.

  Of the incident light 15c that is incident on the optical decoration film 23 through the interface between the concave reflection surfaces 221a of the small number of minute reflection portions 221 and the optical decoration film 23, the refractive index and the film thickness of the optical decoration film 23 are determined. The specific color light, for example, the light 15 d corresponding to the blue wavelength, is separated by the optical decoration film 13 and reflected toward the minute reflection portion 221. Thereby, a decorative pattern 22 formed by designing a morpho butterfly as shown in FIG. 1 is displayed on the surface of the decorative panel 20. Then, the decorative pattern has a light and dark color in which the brightness of light irregularly changed according to the concave reflecting surface 221a of the minute reflecting portion 221 constituting the decorative pattern 22 and the light color separated by the optical decorative film 22 are combined. 22 is colored.

Therefore, according to the decorative panel 20 shown in the second embodiment, a large number of minute reflecting portions 221 are provided on the back surface 21b opposite to the surface 21a on the light incident side of the base material 21 on the back surface 21b of the base material 21. The decorative pattern 22 is configured by continuously arranging the concave reflective surfaces 221a, and a large number of minute reflective portions 221 are formed by the concave reflective surfaces 221a having a trapezoidal roof-shaped three-dimensional shape. Brightness of 1 / f fluctuation is generated in the brightness of the reflected light so that the decorative pattern 22 is brightened and darkened. Further, the reflected light passes through the interfaces of the concave reflecting surfaces 221a of the many minute reflecting portions 221 and the optical decorative film. Among the incident light incident on the optical decoration film 23, the light of a specific color determined by the refractive index and the film thickness of the optical decoration film 23 is separated by the optical decoration film 23 and reflected toward the minute reflecting portion 221. By the decoration model Since 22 is configured to be colored in a light and dark color that matches the light and darkness of the light, the decorative pattern 22 formed on the base material 21 can be brightly displayed in an arbitrary color using light in the visible region. The decorative pattern 22 can be optically decorated with a variety of appearance due to 1 / f fluctuation, and at the same time, it acts on the visual perception of the viewer of the decorative panel 20 to heal, relax or relax. The decorative effect can be demonstrated.
(Embodiment 3)
Next, a third embodiment of the decorative panel according to the present invention will be described with reference to FIGS.

  FIG. 11 is a partially enlarged perspective view showing another example when the micro-reflecting portion is viewed from the back side of the base material by removing the optical decorative film of the decorative panel in the third embodiment, and FIG. FIG. 13 is an enlarged cross-sectional view taken along line 12-12, and FIG. 13 is an enlarged cross-sectional view taken along line 13-13 in FIG.

As shown in FIG. 11, the decorative panel 30 shown in the third embodiment includes a plate-like base material 31 having a certain thickness made of a transparent synthetic resin material such as acrylic or polycarbonate, or a transparent material such as glass. . A decorative pattern 32 formed by designing a morpho butterfly or the like, for example, is formed on the back surface 31b opposite to the light incident side surface (front surface) 31a of the base material 31. Further, on the back surface 31b of the base material 31 including the surface of the decorative pattern 32, as shown in FIGS. 11 and 12, an optical decorative film 33 for coloring and displaying the entire decorative panel 30 including the decorative pattern 32 is formed. ing.
The illumination light 15 of the decorative panel 30 is light from various illumination lamps or natural light such as sunlight.

  As shown in FIGS. 12 and 13, the decorative pattern 32 includes a large number of minute reflecting portions 321 formed on the back surface 31 b of the base material 31 that is an interface with the optical decorative film 33 along the back surface 31 b of the base material 31. It is composed by arranging them continuously. The large number of minute reflecting portions 321 reflects or transmits incident light incident on the base material 31 and causes the brightness of the reflected light to produce 1 / f fluctuations of light and darkness, thereby adding light to the decorative pattern 32. The reflecting surface 321a is a hemispherical three-dimensional shape. The optical decoration film 33 is a specific light determined by the optical decoration film 33 out of incident light that passes through the interface between the reflection surface 321a of the micro-reflecting portion 321 and the optical decoration film 33 and enters the optical decoration film 33. The decorative pattern 32 is colored and displayed in accordance with the brightness of light by reflecting the colored light toward the minute reflecting portion 321.

  As in the case shown in FIG. 6, the optical decoration film 33 is configured by alternately laminating a plurality of, for example, 5 to 10, low refractive thin film layers and high refractive thin film layers. Such an optical decoration film 33 reflects light of a specific color by changing the refractive index and film thickness of the laminated thin film layer, and transmits light of other colors.

Next, a specific example in the case where the brightness of the reflected light generated by the micro-reflecting unit 321 is irregularly changed will be described with reference to FIGS. 12 and 13.
The micro-reflecting part 321 has a hemispherical basic shape as shown in FIG. 12, and gives a 1 / f fluctuation to the basic shape, thereby forming a hemispherical three-dimensional shape as shown in FIGS. It is comprised from the concave reflective surface 321a shape | molded in the shape and continuing planarly. The concave reflecting surface 321a causes the brightness due to the reflection to cause irregularities of light and darkness that resemble the sunbeams or the flow of water in the creek, and the shape thereof is 1 / f fluctuation function f shown in Equation 1 above. It is determined from (x).
That is, the concave reflecting surface 321a which is determined by the 1 / f fluctuation function f (x), a plurality of sine curves with different frequencies: ^{(amplitude 2 -i)} appropriate coefficient ² -i to ⁽² i x Frequency) It becomes the shape which added over.

  As shown in FIGS. 11 to 13, the micro-reflecting portions 321 are continuously arranged in a row and column direction at a predetermined fixed interval L (0 <L <10 mm), and each row adjacent to each other is arranged. The minute reflecting portions 321c are arranged with a shift of 1L in the column direction. The depth h of the concave reflecting surface 321a is set in a range of 0 ≦ h ≦ 20 mm. Further, when the material is polycarbonate, the reflection angle θ1 of the concave reflection surface 321a is about 40 degrees, and the inclination angle θ2 of the concave reflection surface 321a is set in a range of 0 ≦ θ2 ≦ 90 °.

  In the decorative panel 30 shown in the third embodiment, when the light incident side surface (surface) 31a of the base material 31 is irradiated with the illumination light 15, as shown in FIGS. The illumination light 15 becomes incident light 15a as in the case of the first embodiment, travels through the base material 31, and reaches a large number of minute reflection portions 321. Then, a part of the incident light 15a reaching the minute reflecting portion 321 is on the surface 31a side of the base material 31 according to the shape of the concave reflecting surface 321a of the minute reflecting portion 321 determined by the 1 / f fluctuation function f (x). Reflected to. Accordingly, the brightness of the reflected light 15b emitted from the surface 31a of the base material 31 causes a light / dark pattern that changes irregularly according to the 1 / f fluctuation function f (x), and also causes chromatic aberration due to the shift of the light wavelength. Let

  Of the incident light 15c that is incident on the optical decoration film 33 through the interfaces between the concave reflection surfaces 321a of the many minute reflection portions 321 and the optical decoration film 33, the refractive index and the film thickness of the optical decoration film 33 are determined. The specific color light, for example, the light 15d corresponding to the blue wavelength, is separated by the optical decoration film 33 and reflected toward the minute reflecting portion 321. As a result, the decorative pattern 32 formed by designing a morpho butterfly as shown in FIG. 1 is displayed on the surface of the decorative panel 30. Then, the decorative pattern has a light and dark color in which the brightness of light irregularly changing according to the concave reflecting surface 321a of the minute reflecting portion 321 constituting the decorative pattern 32 and the light color separated by the optical decorative film 32 are combined. 32 is colored.

Therefore, according to the decorative panel 30 shown in the third embodiment, a large number of minute reflecting portions 321 are provided on the back surface 31b opposite to the surface 31a on the light incident side of the base material 31 on the back surface 31b of the base material 31. The decorative pattern 32 is formed by arranging the first and second patterns continuously, and a large number of micro-reflecting portions 321 are formed by the concave reflecting surface 321a having a hemispherical three-dimensional shape, thereby being reflected by the concave reflecting surface 321a. The brightness of the generated light is changed to 1 / f fluctuations to give light and darkness to the decorative pattern 32, and the light passes through the interfaces of the concave reflective surfaces 321 a of the large number of micro-reflecting parts 321 and the optical decorative film 33. Among the incident light incident on the optical decoration film 33, light of a specific color determined by the refractive index and the film thickness of the optical decoration film 33 is separated by the optical decoration film 33 and reflected toward the minute reflecting portion 321. By the decoration model Since 32 is configured to be colored in a light and dark color that matches the brightness of the light, the decorative pattern 32 formed on the base material 31 can be brightly displayed in an arbitrary color using light in the visible region. The decorative pattern 32 enables optical decoration that is rich in changes due to 1 / f fluctuations, and at the same time, an optical effect that acts on the visual perception of the viewer of the decorative panel 30 to give healing, relaxation, or comfort. The decorative effect can be demonstrated.
(Embodiment 4)
Next, a fourth embodiment of a decorative panel according to the present invention will be described with reference to FIGS.

  FIG. 14 is an enlarged cross-sectional view of the main part of the decorative panel according to the fourth embodiment of the present invention, and FIG. 15 is an enlarged cross-sectional view of the main part of the decorative panel according to the fourth embodiment.

  This Embodiment 4 shows the modification of the micro reflection part 121 which comprises the decoration pattern 12 of the panel 10 for decoration in the said Embodiment 1, This micro reflection part 121 is shown in FIG.4 and FIG.5. Similarly to the case, by providing 1 / f fluctuation to the basic shape of the triangular roof type, it has a concave reflecting surface 121a that is continuous in a plane and shaped into a three-dimensional shape of the triangular roof type. An optical decorative film 13 is formed on the concave reflecting surface 12a, and the surface 11a on the light incident side of the substrate 11 has a translucent pattern having a decorative pattern such as a wood grain, a floral pattern, or a geometric pattern. Or the transparent decoration layer 18 is formed.

According to the decorative panel in the fourth embodiment, since the decoration layer 18 having a pattern is formed on the light incident side surface 11a of the base material 11, the pattern pattern of the decoration layer 18 is very small. The brightness of randomly changing light with 1 / f fluctuation due to the reflected light generated by the reflection unit 121 is added, thereby giving a three-dimensional effect to the decorative pattern 12 and providing a more attractive decorative panel.
(Embodiment 5)
Next, a fifth embodiment of a decorative panel according to the present invention will be described with reference to FIG.

FIG. 16 is a cross-sectional view schematically showing the action of the micro-reflecting part and the optical decoration film of the decorative panel according to Embodiment 5 of the present invention on light.
As shown in FIG. 16, the decorative panel 40 shown in the fifth embodiment is a plate-like base material having a constant thickness made of a transparent synthetic resin material such as acrylic or polycarbonate, a transparent material such as glass, or an opaque material. 41 is provided. A decorative pattern 42 formed by designing, for example, a morpho butterfly or the like is formed on one surface 41a on the light incident side of the base material 41. Further, an optical decoration film 43 for coloring and displaying the entire decoration panel 40 including the decoration pattern 42 is formed on one surface 41 a of the decoration pattern 42.
The illumination light 15 of the decorative panel 40 is light from various illumination lamps or natural light such as sunlight.

  The decorative pattern 42 is configured by continuously arranging a large number of minute reflecting portions 421 formed on one surface 41a of the base material 41, which is an interface with the optical decorative film 43, along the one surface 41a. . The large number of minute reflection portions 421 reflect or transmit incident light incident on the base material 41 and cause the brightness of the reflected light to produce 1 / f fluctuations of light and dark, thereby adding light to the decorative pattern 42. It is formed with a three-dimensional reflecting surface. Further, the optical decoration film 43 reflects the light of a specific color in the incident light incident on the optical decoration film 43 in the direction opposite to the base material 41, thereby matching the decoration pattern 42 with the brightness of the light. It is configured to display in a colored manner.

  As in the case shown in FIG. 6, the optical decoration film 43 is configured by alternately laminating a plurality of, for example, 5 to 10 low refractive index thin film layers and high refractive index thin film layers. Such an optical decoration film 43 reflects light of a specific color by changing the refractive index and film thickness of the laminated thin film layer, and transmits light of other colors.

  In the decorative panel 40 shown in this fifth embodiment, as shown in FIG. 16, when the optical decoration film 43 side of the base material 41 is irradiated with the illumination light 15, the illumination light 15 is shown in FIG. Thus, the incident light 15a travels through the optical decoration film 43 and reaches a large number of minute reflecting portions 421. Then, a part of the incident light 15a reaching the minute reflecting portion 421 is a base material as indicated by an arrow 15b according to the shape of the concave reflecting surface 421a of the minute reflecting portion 421 determined by the 1 / f fluctuation function f (x). The light is reflected to the side opposite to 41 and emitted outward from the surface of the optical decoration film 43. Along with this, a brightness / dark pattern that irregularly changes in accordance with the 1 / f fluctuation function f (x) in the luminance of the reflected light 15b emitted from the surface of the optical decoration film 43 and chromatic aberration due to the shift of the light wavelength is generated. Cause it to occur.

  Of the incident light 15 a incident on the optical decoration film 43, light of a specific color determined by the refractive index and film thickness of the optical decoration film 43, for example, light corresponding to a blue wavelength, is separated by the optical decoration film 43. Then, the light is reflected outward from the surface of the optical decoration film 43. Thereby, on the surface of the decorative panel 40, as shown in FIG. 1, a decorative pattern 42 formed by designing a morpho butterfly is displayed. Then, the decorative pattern is a light and shaded color in which the light intensity irregularly changing according to the concave reflecting surface 421a of the minute reflecting portion 421 constituting the decorative pattern 42 and the light color separated by the optical decorative film 43 are combined. 42 is colored.

  According to the decorative panel 40 shown in the fifth embodiment, a large number of minute reflecting portions 421 are continuously provided on one surface of the transparent or opaque plate-like base material 41 along the one surface 41a. By arranging the decorative pattern 42 and arranging a large number of micro-reflecting portions 421 with a three-dimensional reflecting surface 421a, the luminance of the light reflected by the three-dimensional reflecting surface is reduced to 1 /. f Lightness and darkness of the decorative pattern 42 is generated by changing the brightness of the decorative pattern 42, and light of a specific color is reflected in a direction opposite to the base material 41 in the incident light incident on the optical decorative film 43. Since the decorative pattern 42 is displayed in a light and shaded color that matches the brightness of the light, the decorative pattern 42 formed on the base material 41 is displayed in a bright color with an arbitrary color using light in the visible region. And 1 on the decorative pattern 42 To allow good-looking optical decorative variegated by f fluctuation, to act on the vision of those who look at the same time, healing, relaxation, or can exhibit optical decorative effect of the peace.

In the above embodiment, the case where the base material is formed of a colorless transparent material or an opaque material has been described. However, the present invention is not limited to this, and the base material can be formed of a colored transparent material. is there. In this case, the appearance of the decorative panel can be emphasized from the viewpoint of color.
Further, the basic shape of the small reflective portion of the decorative panel according to the present invention is not limited to the triangular roof type, trapezoidal roof type, hemispherical roof type shown in the above embodiment, and the reflected light of the small reflective portion Any shape may be used as long as the shape can cause light and darkness that changes irregularly in luminance.
In addition, the three-dimensional concave reflecting surface forming the minute reflecting portion of the decorative panel according to the present invention is not limited to the shape determined by the 1 / f fluctuation function shown in Equation 2, but using a random number table. It is also possible to determine the shape of the concave reflecting surface.
Further, the decorative pattern formed on the decorative panel of the present invention is not limited to the design of the morpho butterfly shown in the above embodiment, but the decoration of the instrument panel for vehicles or the door surface of furniture or the end panel for drawer It may be a decorative panel used for the decoration of the cell phone, the decoration of the surface of the mobile phone main body, the decoration of the surface of the electric appliance, or the design of characters, logo marks, wood grain, and the like.

It is a top view of the panel for decoration which shows Embodiment 1 concerning this invention. It is an expanded sectional view which follows the 2-2 line of FIG. It is a partially expanded perspective view which shows an example of the time from which the optical decoration film of the decoration panel in Embodiment 1 of this invention is removed and a micro reflection part is from the back surface side of a base material. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. FIG. 5 is an enlarged cross-sectional view taken along line 5-5 in FIG. It is sectional drawing which shows typically the effect | action with respect to the light of the micro reflection part of the decoration panel and optical decoration film in Embodiment 1 of this invention. It is a graph which shows an example at the time of expressing the shape characteristic of the concave reflective surface determined by the 1 / f fluctuation function of this invention. It is a partially expanded perspective view which removes the optical decoration film | membrane of the decoration panel in Embodiment 2 of this invention, and shows a micro reflection part from the back surface side of a base material at another example. It is an expanded sectional view which follows the 8-8 line of FIG. It is an expanded sectional view which follows the 10-10 line of FIG. It is a partially expanded perspective view which removes the optical decoration film | membrane of the decoration panel in Embodiment 3 of this invention, and shows the other example of a time from the back surface side of a base material. It is an expanded sectional view which follows the 12-12 line of FIG. It is an expanded sectional view which follows the 13-13 line of FIG. It is an expanded sectional view of the principal part of the panel for decoration in Embodiment 4 of this invention. It is an expanded sectional view of the principal part of the panel for decoration in Embodiment 4 of this invention. It is sectional drawing which shows typically the effect | action with respect to the light of the micro reflection part and optical decoration film of the decoration panel in Embodiment 5 of this invention.

Explanation of symbols

10, 20, 30, 40 Decoration panel 11, 21, 31, 41 Base material 11a, 21a, 31a Front surface 11b, 21b, 31b Back surface 12, 22, 32, 42 Decorative pattern 121, 221, 321, 421 Micro-reflective portion 121a, 221a, 321a, 421a Concave reflecting surface 13, 23, 33, 43 Optical decorative film 131 Low-refractive thin-film layer 132 High-refractive thin-film layer 18 Decorative layer

Claims (6)

A transparent plate-like substrate having a decorative pattern on the surface opposite to the surface on which light is incident;
An optical decorative film for coloring formed on the surface opposite to the light incident surface of the base material and at least the decorative pattern of the decorative pattern;
The decorative pattern is configured by continuously arranging a large number of micro-reflecting portions formed on a surface opposite to the light incident side surface which is an interface with the optical decorative film, along the opposite surface,
The multiple micro-reflecting portions reflect or transmit incident light incident on the base material, and produce 1 / f fluctuations of light / darkness in the brightness of the reflected light to add light / darkness to the decorative pattern. Formed with the original reflective surface,
The optical decoration film transmits light of a specific color to the microreflection section among incident light that is transmitted through the interfaces between the reflection surfaces of the numerous microreflection sections and the optical decoration film and is incident on the optical decoration film. A decorative panel configured to color-display the decorative pattern in accordance with the brightness of the light by reflecting the light toward the screen. A transparent or opaque plate-like substrate having a decorative pattern on one side;
An optical decorative film for coloring formed on at least the decorative pattern of one surface of the substrate and the decorative pattern;
The decorative pattern is configured by continuously arranging a number of micro-reflecting portions formed on one surface of the base material, which is an interface with the optical decorative film, along the one surface,
The large number of minute reflecting portions reflect or transmit incident light that is transmitted through the optical decorative film and incident on the base material, and generates brightness of 1 / f fluctuations in the brightness of the reflected light, thereby producing the decoration. It is formed with a three-dimensional reflecting surface that gives light and darkness to the pattern,
The optical decoration film reflects the decoration pattern in accordance with the brightness of the light by reflecting light of a specific color out of incident light incident on the optical decoration film in a direction opposite to the base material. A decorative panel characterized in that it is configured to.   The optical decoration film is formed by alternately laminating a plurality of low-refractive thin film layers and high-refractive thin film layers. By changing the refractive index and film thickness of the laminated thin film layers, light of a specific color can be obtained. The decorative panel according to claim 1, wherein the decorative panel transmits light of other colors.   The micro-reflecting portion is a triangular shape or a trapezoidal shape formed on the surface opposite to the light incident side surface described above or on one surface of the base material at an arbitrary pitch in a two-dimensional direction continuously along the surface. The decorative panel according to claim 1, wherein the decorative panel has a concave or convex three-dimensional shape such as a hemispherical shape, a semi-elliptical spherical shape, and a wave shape.   The decorative panel according to claim 1, wherein a translucent or transparent decorative layer having a decorative pattern is formed on the surface of the base material on the light incident side.   The decorative panel according to claim 1 or 2, wherein the base material is a colored transparent material.