JP2010201644A - Decorative body and method for producing the same - Google Patents

Abstract

The present invention relates to a decorative body that reflects white light from a part of incident light with interference light having narrowband reflection peaks corresponding to red, green, and blue, and transmits the remaining incident light.
A decorative body X includes a plate body 1 and a film 2 including a plurality of thin films formed on one surface of the plate body and generating interference light by reflection and transmission of incident visible light. Prepare. The interference light generated by the film has a narrow-band reflection peak corresponding to each of the three primary colors (R, G, B) of the light, so that white reflected light can be generated and a part of the incident light is transmitted. Can be made. The decoration effect by white light is obtained, and the part that you don't want to show can be hidden. Furthermore, incident light that does not contribute to generation of interference light can be effectively used as transmitted light.
[Selection] Figure 1

Description

  The present invention relates to a decorative body that generates interference light by reflection and refraction of incident light by a film in which a plurality of thin films are laminated on the surface of a plate body, and in particular, the generated interference light includes: The present invention relates to a technique for generating white reflected light so as to have a narrow band reflection peak corresponding to each of the three primary colors of light, and transmitting a part of incident light to enrich the decorativeness of the device.

  Conventionally, housings for storing objects, cases for incorporating electronic components, etc., or housings such as vehicle bumpers, motorcycle cowls, helmets, etc., are three-dimensionally assembled with plates made of materials such as metal and synthetic resin. Alternatively, it was integrally formed from a single plate in three dimensions. When the outer surface of the casing thus configured is color-decorated, if it is made of a metal material, the surface of the casing is painted or a colored sheet is attached. In the case of using a synthetic resin material, the synthetic resin itself is colored or a colored sheet is attached. Furthermore, methods such as plating and metal vapor deposition have been applied to impart metallic luster to the housing surface.

  In these cases, in the case made by the prior art, the decorative color applied to the surface is fixed and does not change at all, or even if it changes, the change is limited. It is. For example, when a transparent colored sheet is pasted on the surface of the housing, the color of the colored sheet and the transparent color of the housing itself overlap to present a mixed color. The color does not change depending on how you look at it.

  Therefore, as a method for producing a special color effect, a decoration that generates interference light by selectively reflecting and transmitting light of a specific wavelength in the visible light region, and changes in various ways depending on the viewing angle, thereby obtaining an iris color. There is a technique. For example, a film made by laminating a plurality of thin films that reflect and transmit incident light, such as a polarizing film, is bonded to give an iris color, rich in decorativeness, deep pattern, and three-dimensionality. It is.

  As the above-described decoration method, a method of decoration that exhibits a bright iris color by selectively reflecting light of a specific wavelength in the decorative visible light region has been proposed (for example, see Patent Document 1). In this decoration method, a multilayer laminate is provided on the surface of the resin molded body, and an iris color is obtained by selectively reflecting light of a specific wavelength in the visible light region. In this multilayer laminated film, a total of 11 layers or more are alternately formed of a first layer made of a first resin film and a second layer made of a second resin film having a refractive index different from that of the first resin film. Laminated.

  On the other hand, as a method of use other than decoration of this multilayer laminated film, it has been proposed to deposit a multilayer laminated film capable of generating interference light from incident light on the surface of a solar cell (see, for example, Patent Document 2). ). This laminated film is constructed by alternately laminating two types of dielectric layers having different refractive indexes, and reflecting only a narrow-band wavelength. Since the reflectance peak with respect to the wavelength is sharpened, the transmission loss of the solar cell with a good carrier collecting effect can be minimized. Moreover, the laminated film itself also serves as a protective film.

JP 2006-216493 A JP 60-147681 A

  In the conventionally proposed method of decoration, when a multilayer laminated film capable of generating interference light is provided on the surface of the casing of the decoration object, a color tone that changes in a complex manner depending on the viewing angle is obtained, and the decoration object is It can be decorated with a bright iris color, and can be a mixed color of reflection color, interference color, and transmission color, and it is possible to obtain a color tone that changes in a complex manner depending on the viewing angle. In this method, the reflected interference light only has an iris color, and there is a limit that white reflected light cannot be obtained even if white is necessary for decoration.

  In addition, when a multilayer laminated film capable of generating interference light is applied to the surface of the solar cell, the multilayer laminated film is transmitted so as to minimize the transmission loss of the wavelength with a good carrier collecting effect of the solar cell. Although the wavelength region is adjusted and the influence on the power generation efficiency of the solar cell can be reduced, there is a problem that the surface of the solar cell is visible from the outside, which is inconvenient in terms of decoration.

  Therefore, the present invention can conceal a portion where the inside is not desired to be displayed, and also generates interference light having a narrow band reflection peak corresponding to each of the three primary colors of light by the multilayer laminated film, so that the white reflected light is generated. An object of the present invention is to provide a decorative body that can be obtained and transmit a part of incident light and a method for manufacturing the decorative body.

  In order to solve the above problems, a decorative body according to the present invention includes a plate body and a plurality of thin films formed on at least one surface of the plate body, and generates interference light by reflection and transmission of incident visible light. The interference light generated by the film has a narrow-band reflection peak corresponding to each of the three primary colors of light.

  The film is provided on a surface of the plate body on which the visible light is incident, and the plate body is a photovoltaic cell or a photovoltaic panel.

  The film is provided on the surface of the plate body on the side through which the visible light is transmitted, and the film is provided on both surfaces of the plate body. The film was a laminated film in which a plurality of thin films having different refractive indexes and film thicknesses were combined and laminated.

  The plurality of thin films are sequentially formed on the surface of the plate body, and each of the plurality of thin films is formed by vacuum deposition or sputtering of a material selected from oxide, nitride, and metal. To form a film.

  The plate body is colored or the plate body scatters at least part of the incident visible light.

  In the method for manufacturing a decorative body according to the present invention, a multilayer film is formed by sequentially forming a plurality of thin films having different refractive indexes and film thicknesses on at least one surface of a plate body. The interference film including the narrow band reflection peak corresponding to each of the three primary colors of light is generated by reflecting and transmitting visible light, and the laminated film is disposed in a predetermined range on one surface of the plate. It was decided to form.

  As described above, the present invention includes a plate body and a film that includes a plurality of thin films formed on at least one surface of the plate body and generates interference light by reflection and transmission of incident visible light. Since the interference light generated by the film has a narrow band reflection peak corresponding to each of the three primary colors of light, it corresponds to each of red (R), green (G), and blue (B) The white reflected light can be generated by the interference light having the narrow band reflection peak, and a part of the incident light can be transmitted. Therefore, the decoration effect by white light can be obtained, and the portion which is not desired to be displayed can be hidden. Furthermore, incident light that does not contribute to generation of interference light can be effectively used as transmitted light.

It is a figure explaining the outline | summary of the cross section of the decoration body by this embodiment. It is a figure explaining the cross section of the specific example of the decoration body by this embodiment. It is a figure explaining reflection and refraction of incident light in a lamination film used for a decoration object of this embodiment. It is a graph explaining the reflectance in the case of reflecting white color by a prior art. It is a graph explaining the principle of white reflection in the decorative body of this embodiment. It is a figure explaining the outline | summary of the cross section of the other decoration body by this embodiment. It is a figure explaining the application example 1 which adhere | attached the decoration body of this embodiment on the decoration target object. It is a figure explaining the example 2 of application which adhered the decoration object of this embodiment to the decoration subject. It is a figure explaining the example 3 of application which adhered the decoration object of this embodiment to the decoration subject. It is the graph which showed the relationship of the wavelength versus the transmittance | permeability and the reflectance measured about the specific example 1 of the decoration body of this embodiment. It is the graph which showed the relationship of the wavelength versus the transmittance | permeability and the reflectance measured about the specific example 2 of the decoration body of this embodiment. It is the graph which showed the relationship of the wavelength with the transmittance | permeability and the reflectance measured about the specific example 3 of the decoration body of this embodiment. It is the graph which showed the relationship of the wavelength versus the transmittance | permeability and the reflectance measured about the specific example 4 of the decoration body of this embodiment. It is the graph which showed the relationship of the wavelength versus the transmittance | permeability and the reflectance measured about the specific example 5 of the decoration body of this embodiment.

  Next, an embodiment of a decorative body and a manufacturing method thereof according to the present invention will be described below with reference to FIGS.

  First, the basic configuration of the decorative body of this embodiment is shown in FIG. The decorative body is a decoration object, such as a building exterior glass, a building window glass, furniture, curtains, clothing, office equipment, a mobile phone terminal, a personal computer (PC), a clock face plate, a solar cell, etc. , Regardless of the material (glass, resin, metal, carbon, woven fabric, etc.) of the object to be decorated, it is used by being attached to the surface part of the device having a substantially flat or gently curved surface. ing. A decoration body is arranged and decorated on a decoration-required portion of the decoration target object.

  As shown in FIG. 1, the decorative body X of the present embodiment includes a transparent plate 1 formed of any one of glass, synthetic resin, for example, polycarbonate, acrylic resin, and the like on one side of the plate. And a film 2 that can generate an interference color by reflection of incident visible light. Although the cross section of the decorative body is shown in FIG. 1, the structure is schematically shown for convenience of explanation, and is not limited to the illustrated shape and size. For example, a hard plate having a predetermined thickness, a predetermined area and a predetermined shape, a flexible film, or the like can be used as the decorative body.

  Here, the specific structure of the film | membrane 2 used for the decorative body X of this embodiment is shown by FIG. In order to generate interference light by reflection and transmission of incident visible light, a plurality of thin films having different refractive indexes are stacked. In the example of the film 2 shown in FIG. 2, two types of thin films a and b having different refractive indexes are used, and the thin films a (a1 to a7) and the thin films b (b1 to b7) are alternately stacked. There are 14 layers in total.

The thin film a and the thin film b are made of, for example, oxides such as TiO ₂ , SiO ₂ , Ta ₂ O ₅ , Nb ₂ O ₅ , Al ₂ O ₃ , nitrides such as Si ₃ N ₄ and AlN, and tetrafluoride. A film is formed by using a single material or a combination of materials such as an organic compound such as ethylene resin and a fluoride such as MgF ₂ , so that the formed thin film a and thin film b have different refractive indexes. Selected. Although FIG. 2 shows a cross section of the film 2, it is schematically shown for convenience of explanation, and the film 2 is illustrated with a 14-layer structure, but is not limited to this layer structure. More thin films may be stacked.

  FIG. 3 shows the principle of interference in a film in which a plurality of thin films are stacked. Here, a case of a four-layer structure is shown as an example, and thin films a 1, b 1, a 2, and b 2 are formed as a film 2 on the substrate 1. The principle is not limited to the case of this four-layer structure, and the principle is the same in the case of a multilayer structure of five or more layers. In FIG. 3, the parallel light is typically shown as light L incident on the thin film.

When the light L is incident on the film 2 having a parallel plane, a part of the light is reflected at an interface different from the surface of the thin film and the incident surface inside each thin film, and the remaining thin film is present in the lower layer. For example, it refracts and enters the thin film. In this way, the light L is repeatedly reflected and internally entered along a path as shown in FIG. 3 to form outgoing light L _R1 , L _R2 , L _R3 , L _R4 , and L _R5 as a film. 2 is emitted from the surface. For example, these outgoing lights are observed by human eyes.

The outgoing light L _R1 , L _R2 , L _R3 , L _R4 , and L _R5 have different optical path lengths due to repeated reflection and internal entry in each thin film. A phase shift occurs. Therefore, the emitted light L _R1 , L _R2 , L _R3 , L _R4 , and L _R5 having different phases reach the observer from the film 2.

Here, if the phases of the outgoing lights L _R1 , L _R2 , L _R3 , L _R4 , and L _R5 reflected at the interfaces of the respective thin films match, the light reflected by the film 2 is reflected on the observer's eyes. If it looks bright and the phases are reversed, the light appears dark. In this way, light and darkness of light is generated by this phase difference, and when viewed from the observer's eyes, a certain wavelength, that is, a certain color is reflected brightly, and a certain color is not reflected. The light observed here is interference light.

  In the above, the principle of the interference phenomenon that occurs in a film in which a plurality of thin films having different refractive indexes is laminated has been described. In the case of a multilayer thin film, the number of thin films is increased and its thickness and refractive index are precisely controlled. Only specific light can be reflected or, conversely, transmitted. In the case of a multilayer thin film having a larger number of layers, the controllability of transmitted light and reflected light is increased compared to the case of a multilayer thin film having a smaller number of layers. In practice, the number of multilayer thin films in the film is increased to increase the wavelength selectivity.

  In this way, in a film formed by laminating a plurality of thin films having different refractive indexes, a thin film interference phenomenon can be used, and a different color can be developed without using a dye, or even without using a metal film. Realizes metallic luster. When white light is incident on the laminated film, there is a difference in refraction depending on the wavelength of the light incident on the thin film, so the white light is decomposed into rainbow-colored light from long to short wavelengths and decomposed. Each of the emitted lights interferes with each other at the incident point of the white light, and as a result, an iridescent decoration effect can be obtained.

As described above, for example, TiO ₂ , SiO ₂ , Al ₂ O ₃ , Ta ₂ O ₅ , and the thin films a 1, a 2, a 3 and the thin films b 1, b 2 of the film 2 provided in the decorative body X of the present embodiment. Materials made of oxides such as Nb ₂ O ₅ , nitrides such as Si ₃ N ₄ and AlN, fluorides such as MgF ₂ , and organic compounds such as tetrafluoroethylene resin have a refractive index of each other. The films are selected differently and combined to form a film.

  In the formation of each thin film described above, vacuum deposition, sputtering, or the like of a selected material is used, and the thin film a1 is directly formed on one surface of the plate body 1 that is the base material of the decorative body X, and has a predetermined thickness. Formed. Next, the thin film b1 is directly formed on the surface of the formed thin film a1 and formed to a predetermined thickness. In this way, in each thin film to be laminated thereafter, the thin film a and the thin film b are alternately formed, and a predetermined number of thin films a1 to a7 and b1 to b7 are laminated as illustrated in FIG. A film 2 is formed on one side of the plate 1.

  In the film using the multilayer laminated film described above, as in the case of the conventional multilayer laminated film, only the iris color due to the interference light can be obtained, and the plate 1 is transparent, so that the surface of the object to be decorated is I can see it. Therefore, the principle for realizing the above-described problem of the present invention will be described below.

For example, even in the case of a film in which a metal thin film (for example, Ag) having a film thickness of 1 to 40 [nm] is formed on the upper surface of a TiO ₂ layer formed on a plate, as shown in FIG. A part of the incident white light can be reflected and the remaining white light can be transmitted. Since part of the white light is reflected, the white light is reflected from the outside, and the inside cannot be seen. In addition, when measured using the metal thin film, the average over the visible light wavelength has a reflectance of 60 to 70 [%] and a transmittance of 10 to 20 [%] in the thicker one. On the other hand, when the film thickness was reduced, the reflectance was 10 to 30% and the transmittance was 50 to 60%.

  However, in this case, since it is reflected or partially transmitted over the entire wavelength of white light, in the case of FIG. Although white light appears to be reflected, the amount of light having a wavelength that contributes to power generation decreases, and the incident white light cannot be used effectively.

  Therefore, in the decorative body of the present embodiment, the film 2 generates interference light having narrowband reflection peaks corresponding to the three primary colors of light, red (R), green (G), and blue (B). The principle that the interference light is white reflected light and a part of the incident light is transmitted is adopted. This principle is illustrated in FIG.

  In FIG. 5, the horizontal axis represents the wavelength [nm] of the incident light, and the vertical axis represents the reflectance of the incident light. In the figure, a curve A shows a change in reflectance according to the principle of the present embodiment, and a broken line A0 is shown as a reference, and corresponds to the reflectance according to the prior art of FIG. The change in reflectance due to curve A is markedly higher compared to other wavelength regions at the narrowband reflection peaks corresponding to the three primary colors of light, red (R), green (G), and blue (B). ing. Although the transmittance decreases at each narrow band reflection peak, the transmittance can be sufficiently secured in other wavelength regions.

  In the decorative body X of the present embodiment, reflected light having a narrow band reflection peak corresponding to each of red (R), green (G), and blue (B) is realized by interference light by the multilayer laminated film of the film 2. ing. In the film 2 shown in FIG. 2, the thickness of each thin film is drawn to be the same for the sake of schematic representation, but actually, the thickness of each thin film is made different and reflected. The thickness of each thin film is made different so that the interference light is emphasized at each narrow band reflection peak. In order to obtain such interference light, the transmittance and reflectance of each thin film are calculated according to the plastic optical property test method shown in the Japanese Industrial Standards (JIS), and the thin film constituting the film is calculated. The thickness of each thin film is determined according to the number of layers.

  In the decorative body X in the present embodiment of FIG. 1 described above, the film 2 is formed on the upper surface of the plate body 1 on the side on which incident light is incident. However, the present invention is not limited to this, and the film 2 is a plate body. 1 may be formed on the lower surface side, that is, the side where incident light passes through the plate 1 and exits. If it has the same structure as the film 2 shown in FIG. 2, even in the case shown in FIG. 6, white light transmitted through the transparent plate 1 is incident on the film 2. According to the principle of reflection and transmission shown in FIG. 3, it has the same effect as the decorative body of FIG.

  Next, an application example in which the decoration body X of the present embodiment described above is attached to a decoration target object of a device and decorated will be described with reference to FIGS. 7 to 9.

(Application example 1)
In the application example 1 of FIG. 7, the decorative body X shown in FIG. 1 is used, and is shown in a cross-sectional view. Also here, it is schematically displayed for convenience of explanation. In this application example 1, the decoration body X is attached to the decoration target object 3 with the transparent adhesive 4 so that the film 2 is on the upper side and the plate body 1 is on the lower side. The adhesive 4 can be a polyethylene resin type.

  Here, when the decoration body X is affixed to the surface of the decoration target object 3, for example, a solar cell (cell or panel), the solar cell itself is externally affected without affecting the power generation efficiency of the solar cell. It can be hidden so that it cannot be seen, and since it is reflected by white light, the decorativeness of the solar cell can be improved. For example, in the case of a solar cell made of single crystal or polycrystalline silicon, the wavelength with a good carrier collection effect is biased to a region longer than the wavelength in the visible light region, and therefore the presence of a narrow-band reflection peak does not affect much. In the case of solar cells using amorphous silicon, the wavelength with good carrier collection effect is in the visible light region, but by making the narrow-band reflection peak steeper, the effect on power generation efficiency is minimized. Can be limited.

  Moreover, when applying the decoration body X of this embodiment shown by FIG. 1 to a solar cell, a photovoltaic cell itself can be utilized as the plate body 1, and a plate body can be abbreviate | omitted. In this case, the film 2 can also be used as a protective film for the solar battery cell, and the solar battery cell itself can be seen from the outside without affecting the power generation efficiency, as in the application example to the solar battery described above. It can be hidden so that the decorativeness of the solar cell can be improved.

  For example, if you want to make numbers or letters visible from the outside, such as a watch with solar cells built into the dial, but you do not want to show other parts of the solar cells, it corresponds to the numbers or letters. The film 2 may be formed only on the solar cell portion without forming the film 2 on the portion to be processed.

  In the decorative body X shown in FIG. 1, since the film 2 is formed on the upper surface of the plate body 1, if the film 2 is formed in a predetermined shape instead of the entire surface of the plate body 1, A decorative effect by white light is obtained. For example, if a film is formed in the form of a pattern, characters / symbols, etc., white light is reflected with respect to the incidence of natural light according to the shape. Here, in the remaining portions, if the plate body 1 is transparent, the surface of the decoration target object 3 can be seen. In this case, the plate 1 can be colored or decorated such as a pattern, and a decorative effect in which a portion of white light reflection exists in the pattern or the like can be obtained. Moreover, the film | membrane 2 can also be formed into a film according to the shape of the part which wants to hide the inside or surface of the decoration target object 3 from the outside.

  Further, the plate 1 is made of a transparent plate or film in which a reflecting material made of fine particles or fine pieces is dispersed or the surface is roughened to scatter at least part of incident visible light. You can also. In this case, since the light transmitted through the film 2 is scattered in the plate body 1 and a part of the scattered light is emitted to the surface through the film 2, the decorative body X has a weak pearl color. Exhibits brightness.

(Application example 2)
In the application example 1 described so far, when the decoration body X is attached to the decoration target object 3, the lower surface of the plate body 1 is attached to the surface of the decoration object 3. In the application example 2 shown, the decorative body X shown in FIG. 6 is used, the decorative body X is set on the upper side, and the film 2 is attached to the surface of the decoration target object 3. The application example 2 in FIG. 8 is also shown in a cross-sectional view and schematically displayed for convenience of explanation. The film structure of the decorative body X in Application Example 2 is the same as that of the decorative body shown in FIG. 2, but the positional relationship between the plate 1 and the film 2 is as shown in FIG. It is the opposite.

  Also in the application example 2, when the decoration body X is attached to the decoration target object 3, for example, the surface of the solar cell, the solar cell itself cannot be seen from the outside without affecting the power generation efficiency of the solar cell. Moreover, since it is reflected by white light, the decorativeness of the solar cell can be improved. In the case of the application example 2, as in the case of the application example 1, the presence of the narrow band reflection peak is not so much affected, and the influence on the power generation efficiency is minimized by making the narrow band reflection peak steeper. Can be. Moreover, the solar cell itself can be hidden from view from the outside, and the decorativeness of the solar cell can be improved.

  In the case of the application example 2, similarly to the application example 1, if the film 2 is formed in a predetermined shape instead of the entire surface of the plate body 1, a decorative effect by white light can be obtained. For example, if the film is formed in the shape of a pattern, characters / symbols, etc., the white light is reflected with respect to the incidence of natural light according to the shape, and the plate 1 is transparent in the remaining portions. The surface of the decoration target object 3 can be seen. In this case, the plate 1 can be colored or decorated with a pattern or the like, and a decorative effect in which a light reflecting portion exists in the pattern or the like can be obtained. Moreover, the film | membrane 2 can also be formed into a film according to the shape of the part which wants to hide the inside or surface of the decoration target object 3 from the outside.

  Further, as in the case of Application Example 1, the plate 1 is dispersed with a reflective material of fine particles or fine pieces, or the surface is roughened to scatter at least a part of incident visible light. A transparent plate or film can also be used, and the decorative body X can be given a pearly shine.

(Application example 3)
The application example 3 can be said to be a modification of the application example 1 described above, and two decoration bodies X1 and X2 having the same structure as the decoration body X shown in FIG. This is the case where they are pasted together. FIG. 9 shows an application example 3 in a cross-sectional view. Also here, it is schematically displayed for convenience of explanation.

  As shown in FIG. 9, the decorative body X1 is composed of a plate body 1-1 and a film 2-1, and the decorative body X2 is composed of a plate body 1-2 and a film 2-2. The lower surface of the plate body 1-1 is attached to the decoration target object 3 with the adhesive layer 4-1, and the lower surface of the plate body 1-2 of the decorative body X2 is bonded to the film 2-1 of the decorative body X1. It is pasted in.

  In the case of the application example 3, if the decorative bodies X1 and X2 having the same structure are used, narrowband reflections corresponding to the three primary colors of light, red (R), green (G), and blue (B), respectively. Since the interference light having a peak can be more emphasized, the reflectivity of white light can be increased, the same decorative effect as in the case of Application Example 1 can be obtained, and the portion to be hidden cannot be seen from the outside. You can also. Further, the plate 1-1 of the decorative body X1 can be made non-transparent, and the plate 1-2 of the decorative body X2 can be made transparent.

(Concrete example)
Next, specific examples of the decorative body X that can be used in the application examples 1 to 3 described above will be described with reference to FIGS. 10 to 14.

  As described above, in the decorative body X of the present embodiment, the reflected light having the narrow band reflection peak corresponding to each of red (R), green (G), and blue (B) is transmitted by the multilayer laminated film of the film 2. Realized by interference light. In order to obtain such interference light, the transmittance and reflectance of each thin film are calculated according to the optical property test method described above, and the film of each thin film is determined according to the number of thin films constituting the film. The thickness was determined. Here, the film thickness in the case of 14 layers is designated as specific example 1, the film thickness in the case of 16 layers is designated as specific examples 2 and 3, the film thickness in the case of 18 layers is designated as specific example 4, and 20 The film thickness in the case of the layer is shown in Table 1 as specific example 5.

In [Table 1], the “layer” column indicates the layer number of the thin film included in the film 2, and the “film thickness” column indicates the film thickness [nm] of each layer corresponding to each specific example. In the “oxide” column, the names of the oxides used in each layer are shown. In these embodiments, the thin film a in film 2, using the TiO _2, the thin film b, using SiO _2.

  Here, the measurement results of the reflectance and transmittance of the film 2 according to the specific examples 1 to 5 are shown in FIGS. In each figure, the horizontal axis represents wavelength [nm], and the vertical axis represents reflectance [%] and transmittance [%]. In addition, the curves A1 to A5 shown in the figure show the change in reflectance, and the curves B1 to B5 show the change in transmittance. Furthermore, in each figure, the position of the narrow-band reflection peak corresponding to each of red (R), green (G), and blue (B) is indicated by a thick broken line.

  Looking at the curves A1 to A5 and the curves B1 to B5 of the specific examples shown in FIGS. 10 to 14, reflection occurs in the vicinity of wavelengths corresponding to red (R), green (G), and blue (B). The rate is high and the transmittance is low. Then, the reflectance is low and the transmittance is high except for the vicinity of the wavelength corresponding to each.

  From these, in the decorative body X of the present embodiment, the interference light generated by the reflection and transmission of the incident light in the multilayer laminated film of the film 2 is red (R), green (G), and blue (B). Narrowband reflection peaks corresponding to each of them exist, indicating that white reflected light can be obtained. It also shows that the remaining incident light is secured as transmitted light except in the vicinity of the wavelengths corresponding to red (R), green (G), and blue (B).

  For example, when the curve A1 in the specific example 1 in FIG. 10 is compared with the curve A5 in the specific example 5 in FIG. 14, the curve A1 corresponds to red (R), green (G), and blue (B). The peaks near the wavelength are slightly gentle, whereas in the curve A5, those peaks are steep. The sharper the peak, the greater the amount of transmitted light, which is suitable for effective use of transmitted light.

  Specific examples 1 to 5 shown in [Table 1] are examples, and the film thickness of each thin film in the film 2 is not limited to these, and depends on the refractive index of the material used for the thin film. Thus, the reflectance and transmittance are different and can be appropriately adjusted by calculation, and the number of layers of the film 2 can be further increased.

DESCRIPTION OF SYMBOLS 1, 1-1, 1-2 Plate body 2, 2-1, 2-2 Film | membrane 3 Object to be decorated 4 4-1, 4-2 adhesive layer

Claims (13)

A plate,
Including a plurality of thin films formed on at least one surface of the plate body, and a film that generates interference light by reflection and transmission of incident visible light, and
The decorative body, wherein the interference light generated by the film has a narrow-band reflection peak corresponding to each of the three primary colors of light.   The decorative body according to claim 1, wherein the film is provided on at least a surface of the plate body on which the visible light is incident.   The decorative body according to claim 1, wherein the plate body is a solar battery cell or a solar battery panel.   The decorative body according to claim 1, wherein the film is provided on a surface of the plate body through which the visible light is transmitted.   2. The decorative body according to claim 1, wherein the film is provided on both surfaces of the plate body.   The decorative body according to any one of claims 1 to 5, wherein the film is a laminated film in which a plurality of thin films having different refractive indexes and film thicknesses are combined and laminated.   The decorative body according to claim 6, wherein the plurality of thin films are sequentially formed on a surface of the plate body.   8. The decorative body according to claim 6, wherein each of the plurality of thin films is formed by vacuum deposition or sputtering of a material selected from an oxide, a nitride, and a fluoride. .   The decorative body according to any one of claims 1 to 8, wherein the plate body is colored.   The decorative body according to claim 1, wherein the plate body scatters at least a part of the incident visible light. On at least one surface of the plate body, a plurality of thin films having different refractive indexes and film thicknesses are sequentially formed to form a laminated film,
The method of manufacturing a decorative body, wherein the laminated film reflects and transmits incident visible light to generate interference light including narrowband reflection peaks corresponding to the three primary colors of light.   The method for manufacturing a decorative body according to claim 11, wherein the laminated film is formed in a predetermined range on one surface of the plate.   The manufacturing of the decorative body according to claim 11, wherein the laminated film is formed by forming a number of thin films less than the plurality of thin films in a specific range on one surface of the plate body. Method.

Images