Lighting device, object to be illuminated, and method for manufacturing object to be illuminated

Abstract

The present invention realizes a picture or the like stably with high reproducibility with which it is possible to express a landscape including delicate gradation.　A lighting device for illuminating an object to be illuminated having a graphic including an image and / or a character on a surface includes: a first illumination lamp capable of irradiating the object to be illuminated with visible light; a second illumination lamp capable of irradiating the object to be illuminated with ultraviolet light; and an illumination lamp control means capable of controlling the first and second illumination lamps. The object to be illuminated includes a base material, and a first graphic layer having a first graphic and a second graphic layer having a second graphic that are formed on the base material. The first graphic is visually recognizable under visible light, and the second graphic layer has an ultraviolet-excited luminescent substance that emits visible light on the basis of irradiation with ultraviolet light. The second graphic is visually recognizable under ultraviolet light, and the ultraviolet-excited luminescent substance of the second graphic layer contains a pigment, and the second graphic layer has a pigment spray mark.

Description

Illumination device, illuminated object, and method for manufacturing an illuminated object.

[0001] The present invention relates to a lighting device, an object to be illuminated, and a method for manufacturing an object to be illuminated.

[0002] Patent Document 1 discloses a lighting device that uses a special paint that emits or reflects ultraviolet light to illuminate a picture or the like that simultaneously depicts, for example, a daytime scene and a nighttime scene, and a lighting device that can meet the desires of viewers who want to enjoy the viewing of pictures or the like in a realistic way along with music.

[0003] Patent No. 5667279

[0004] Conventional lighting devices have made it possible to enjoy the viewing of pictures and other images with music in a highly realistic way. However, expressing landscapes with delicate gradations has only been possible by chance through trial and error.

[0005] The present invention has been made in view of the above circumstances, and aims to realize highly reproducible and stable drawings that can express even landscapes with delicate gradations, using a method supported by technical knowledge.

[0006] In order to achieve the above-mentioned object, one aspect of the present invention is an illumination device that illuminates an illuminated object having a graphic including an image and / or text on its surface, comprising: a first illumination lamp capable of irradiating the illuminated object with visible light; a second illumination lamp capable of irradiating the illuminated object with ultraviolet light; and an illumination lamp control unit that controls the first illumination lamp and the second illumination lamp; wherein the illuminated object comprises a substrate, a first graphic layer having a first graphic formed on the substrate, and a second graphic layer formed on the opposite side of the first graphic layer from the substrate and having a second graphic; the first graphic is visible under visible light, the second graphic layer contains an ultraviolet-excited luminescent material that emits visible light when irradiated with ultraviolet light, the second graphic is visible under ultraviolet light, the second graphic includes a specific graphic, the ultraviolet-excited luminescent material of the second graphic layer corresponding to the specific graphic contains a pigment, and the second graphic layer corresponding to the specific graphic has pigment spray marks.

[0007] According to the present invention, it is possible to stably produce highly reproducible drawings that can express even landscapes containing delicate gradations using a method supported by technical knowledge.

[0008] 1 is a schematic diagram showing the overall configuration of an illumination system 100; FIG. 2 is a diagram showing a cross-sectional view and a display example of a non-illuminated object; FIG. 3 is a block diagram showing the hardware configuration of an information processing device; FIG. 4 is a block diagram showing the functional configuration of an illumination device; FIG. 5 is a diagram showing an evaluation result for the application conditions of a coloring material to an illuminated object; and FIG. 6 is a diagram showing the relationship between a change in illuminance of ultraviolet light irradiated on an illuminated object and a change in the color expressed.

[0009] <Overview> The following describes embodiments with reference to the accompanying drawings. In this embodiment, an example of an illumination device that illuminates a still image is described. The illumination device appropriately irradiates the image with visible light and ultraviolet light. The image has two or more layers, with an image visible under visible light superimposed on top of an image that is not visible under visible light but is visible only under ultraviolet light. The portion of the image that is visible only under ultraviolet light contains a pigment that is excited by ultraviolet light and emits visible light. For example, the image visible under visible light is an oil painting. For example, a pigment is sprayed onto the oil painting to create an image that is visible only under ultraviolet light. First, the illumination device irradiates visible light, and a first image (e.g., a daytime landscape) is viewed based on the light reflected from the image. Then, the illumination device irradiates the image by lowering the illuminance of the visible light and increasing the illuminance of the ultraviolet light. This causes the pigment to emit visible light, and a second image (e.g., a nighttime landscape) is viewed. The density of the pigment changes gradually across the surface of the image, allowing for a gradation of color within the image. For example, in a painting of Mount Fuji, appropriate illumination with visible and ultraviolet light creates a scene of white clouds floating by during the day, and a sunset that gradually changes from yellow-orange to red in the evening.

[0010] <Overall Configuration of the Lighting System> Fig. 1 is a schematic diagram showing the overall configuration of a lighting system 100. The lighting system 100 includes an information processing device 1, a lighting device 2, an audio device 3, a communication device 4, and an illuminated object 5. In Fig. 1, arrow X1 indicates the right-hand direction when a user observes a picture that is the illuminated object 5. Y1 is perpendicular to X1 and indicates the direction of the top of the user's head. Z1 is perpendicular to X1 and Y1 and indicates the direction from the picture display surface of the illuminated object 5 toward the user. X2 is the opposite direction to X1, Y2 is the opposite direction to Y1, and Z2 is the opposite direction to Z1.

[0011] The information processing device 1 controls the lighting device 2. The information processing device 1 controls the sound device 3. The hardware configuration and functional configuration of the information processing device 1 will be described in detail later.

[0012] The lighting device 2 has a first illuminating light 21, a second illuminating light 22, and an illuminating light control unit 23. The lighting device 2 may have a plurality of first illuminating lights 21 and a plurality of second illuminating lights 22. The plurality of first illuminating lights 21 and the plurality of second illuminating lights 22 may each illuminate a different area of ​​the illuminated object 5.

[0013] The first illuminating lamp 21 is an illuminating lamp capable of irradiating the illuminated object 5 (described later) with visible light. The first illuminating lamp 21 may be, for example, an incandescent lamp, a halogen lamp, or an LED lamp. Visible light is light with a wavelength visible to the human eye, which is light with a wavelength of 380 nm or more and 780 nm or less. The first illuminating lamp 21 has a spectrum with a half-width of, for example, 1000 nm or more, based on the entire wavelength range. In other words, the first illuminating lamp 21 is an illumination lamp with an extremely wide spectral range, extending from the visible region to the infrared region. In this embodiment, the first illuminating lamp 21 has an ultraviolet intensity that is 1 / 10 or less, preferably 1 / 100 or less, and more preferably 1 / 1000 or less, of the intensity of the ultraviolet light emitted by the second illuminating lamp 22 (described later). The first illuminating lamp 21 illuminates the illuminated object 5 (described later), for example, from above or below. The position of the first illuminating lamp 21 may be determined in accordance with the position of the frame of the illuminated object 5 (described later) (the positional relationship may be specified).

[0014] The first illuminating lamp 21 preferably has a color temperature of 4000 K or less. Light with a color temperature of 4000 K or less is known to induce relaxation and comfort compared to light with a color temperature higher than 4000 K. In contrast, daylight or daylight white light with a color temperature higher than 4000 K, such as pale blue light with a color temperature of 6000 K to 8000 K, stimulates the eyes, causing tension in the body, and increases the contrast of the image, highlighting contours. Furthermore, this pale blue light impairs the calm scene of a specific object to be depicted by the second illuminating lamp 22, described below, and the underlying effect of gradually changing color and / or brightness within the screen. Hereinafter, the effect of gradually changing color and / or brightness within the screen is referred to as the "gradation effect." The gradation effect is the effect of gradually changing color and / or brightness within the screen. To provide a calm, relaxing scene and a gradation effect, it is preferable to use light with a color temperature of 4000 K or less, as described above.

[0015] Furthermore, the half-width of the optical spectrum of the first illuminating lamp 21 is preferably broadband, greater than or equal to 1000 nm, based on the entire wavelength range. Using LED lighting with a narrow bandwidth as the first illuminating lamp 21 may result in poor color rendering. For illustrations with a reflection spectrum outside of this narrow bandwidth, the intended reflected light cannot be obtained. As a result, the intended display is difficult to achieve. For example, using LED lighting with emission centers only in blue (20 nm bandwidth centered around 450 nm), green (e.g., 20 nm bandwidth centered around 520 nm), and red (e.g., 20 nm bandwidth centered around 630 nm) makes it difficult to achieve the intended display. For example, for a yellow illustration with a reflection peak around 570 nm, the illustration cannot be expressed in the yellow peak wavelength, resulting in the intended display being impossible.

[0016] The second illuminating lamp 22 is, for example, an illuminating lamp capable of emitting ultraviolet light. The second illuminating lamp 22 is, for example, a fluorescent tube (a so-called black light). In this embodiment, the second illuminating lamp 22 irradiates the illuminated object 5 (described later) with light having a wavelength of 300 nm or more and 400 nm or less, ultraviolet light generally referred to as UVA. The second illuminating lamp 22 irradiates the illuminated object 5 (described later) from, for example, the Y1 direction or the Y2 direction. The illumination direction may be determined based on a positional relationship with a frame of the illuminated object 5 (described later).

[0017] The second illumination lamp 22 irradiates the illuminated object 5 with ultraviolet light having a narrower wavelength range than conventional ultraviolet light (wavelengths of 10 nm to 400 nm). Multiple types of fluorescent or phosphorescent materials, described below, are used, and the peak wavelengths of their absorption spectra do not coincide. The second illumination lamp 22 preferably uses ultraviolet light whose half-width of the optical spectrum encompassing each peak wavelength is 50 nm or greater. This allows for luminescence excited at the peak absorption wavelengths of the fluorescent and phosphorescent materials. This allows for luminescence corresponding to the density of the fluorescent and phosphorescent materials. As a result, an in-plane gradation of luminescence intensity reflecting the gradation in density of the fluorescent and phosphorescent materials is achieved, achieving the intended gradation effect. If LED ultraviolet lighting is used as the second illumination lamp 22, it is difficult to achieve the gentle and delicate gradation effect described below. This is because the half-width of LED ultraviolet lighting is often 50 nm or less. This may impair the luminescence of light-emitting materials that have low absorption at the peak wavelengths of LED ultraviolet lighting.

[0018] The illuminating light control unit 23 supplies current to the first illuminating light 21 and the second illuminating light 22. The illuminating light control unit 23 also controls the first illuminating light 21 so as to irradiate the illuminated object 5 with visible light. The illuminating light control unit 23 also controls the second illuminating light 22 so as to irradiate the illuminated object 5 with ultraviolet light.

[0019] The acoustic device 3 includes a sound source playback unit 31 and a speaker 32. The sound source playback unit 31 plays audio data in, for example, MP3 format. The speaker 32 is, for example, a dynamic speaker that produces sound by vibrating a diaphragm based on a voice coil and a magnet.

[0020] The communication device 4 receives a control signal from the information processing device 1, which will be described later, and sends the received control signal to the lighting device 2 and the sound device 3 described above.

[0021] The illuminated object 5 has a substrate 50, a first graphic layer 51, and a second graphic layer 52. As shown in Fig. 1, the illuminated object 5 is irradiated with visible light from a first illuminating lamp 21 and ultraviolet light from a second illuminating lamp 22. Fig. 2(a) is a cross-sectional view of the illuminated object 5 shown in Fig. 1 taken along line s1-s1. The substrate 50 is, for example, a canvas made of canvas stretched over a wooden frame.

[0022] As shown in FIG. 2( a), the first graphic layer 51 is in contact with the substrate 50 and is located on the Z1 direction side of the substrate 50. The first graphic layer 51 displays a first graphic that is visible under visible light. The first graphic includes a drawing target. A drawing target, also called a drawing object, refers to an individual shape that constitutes a two-dimensional image. In the example of the landscape painting shown in FIG. 1, the drawing target includes trees, Mount Fuji, and the sky. The first graphic layer 51 has visible colorants. A visible colorant refers to a material that reflects light of a color visible to the human eye when illuminated with visible light, and is a colorant in the usual sense. Visible colorants also include materials that reflect achromatic colors, such as white colorants. An achromatic color refers to a color where -10≦a*≦10 and -10≦b*≦10 in the L*a*b* color space defined by the International Commission on Illumination (CIE 1976), preferably a color where -5≦a*≦5 and -5≦b*≦5, and more preferably a color where -3≦a*≦3 and -3≦b*≦3. White refers to a color that is achromatic and has L* of 80≦L* in the L*a*b* color space, preferably a color that is achromatic and has L* of 85≦L* in the L*a*b* color space, and more preferably a color that is achromatic and has L* of 90≦L* in the L*a*b* color space. However, achromatic and white colorants are not limited to these.

[0023] The first graphic layer 51 may be, for example, an oil painting layer. The first graphic layer 51 may also be a print. The first graphic layer 51 may also be one created by a printing machine. The first graphic layer 51 may also be one in which an image is displayed by a combination of dots of basic colors (e.g., cyan, magenta, yellow, and black), such as in gravure printing, screen printing, intaglio printing, or letterpress printing.

[0024] The first graphic layer 51 may be, for example, a hand-painted oil painting or a mass-produced graphic produced by a printing machine. The step of forming the first graphic layer 51 includes, for example, applying a colorant in the visible region for at least 60 seconds.

[0025] As shown in FIG. 2( a), the second graphic layer 52 is located in contact with the first graphic layer 51 on the opposite side from the substrate 50, i.e., the Z1 direction side. The second graphic layer 52 displays a second graphic that is visible when irradiated with ultraviolet light. The second graphic layer 52 contains an ultraviolet-excited luminescent material that emits visible light when irradiated with ultraviolet light. The second graphic includes a drawing target. The drawing target, also referred to as a drawing object, refers to an individual shape that constitutes a two-dimensional image. In the example of the landscape painting shown in FIG. 1, the drawing target includes a sea of ​​clouds 521 and a moon 522. The second graphic layer 52 contains multiple types of ultraviolet-excited luminescent materials, and each ultraviolet-excited luminescent material emits various colors, such as blue-purple, red-purple, red, orange, yellow-orange, yellow, and yellow-green, when irradiated with ultraviolet light. The second graphic is invisible under visible light but visible under ultraviolet light.

[0026] An ultraviolet-excited luminescent material is a material that emits visible light when irradiated with ultraviolet light. For example, an ultraviolet-excited luminescent material is a fluorescent material or a phosphorescent material. An ultraviolet-excited luminescent material is transparent or white under visible light without ultraviolet light. "Transparent" means that the visible light transmittance after luminosity correction is 90% or more. A fluorescent material emits visible light while irradiated with ultraviolet light and ceases to emit light when the ultraviolet light irradiation is stopped. Fluorescence emits and extinguishes without a time delay when ultraviolet light is turned on (irradiated) and off (irradiation is stopped). Phosphorescent materials emit visible light while irradiated with ultraviolet light and maintain their emission for a certain period of time even after the ultraviolet light irradiation is stopped. Phosphorescent materials are also called phosphorescent materials. When ultraviolet light is turned on or irradiated, phosphorescent materials emit light with a time delay and extinguish with a time delay. When ultraviolet light is turned off or irradiation is stopped, phosphorescence extinguishes with a time delay. The ultraviolet-excited luminescent material is attached to a substrate 50 (e.g., a painting, calligraphy, or print) on which a landscape, object, character, image, or the like is expressed as a two-dimensional image by a first graphic layer 51. The second graphic layer 52 is formed, for example, by applying the ultraviolet-excited luminescent material to the substrate 50 on which the first graphic layer 51 has been formed. The ultraviolet-excited luminescent material is a pigment or a dye. A pigment is a material that has color and is insoluble in water or other solvents. A dye is a material that has color and is soluble in water or other solvents.

[0027] The second graphic layer 52 is formed by a second graphic. In FIG. 1 , the second graphic is, for example, a sea of ​​clouds 521 and a moon 522. Here, the second graphic has a specific graphic. The specific graphic is a graphic having a gradation region. A gradation region is a region in which the hue, brightness, and / or saturation observed in the light emitted from an ultraviolet-excited luminescent substance under ultraviolet irradiation gradually changes within a plane. For example, the specific graphic is the sea of ​​clouds 521 in the illustration of Mount Fuji shown in FIG. 1 . Below, the sea of ​​clouds 521 will be used as an example of a specific graphic. A second graphic that is not classified as a specific graphic does not have a gradation region. For example, the moon 522 does not have a gradation region. Below, the moon 522 will be used as an example of a second graphic that is not a specific graphic.

[0028] An example will be described in which a gradation region has a gradual change in hue, lightness, and / or saturation within a plane under ultraviolet irradiation. The change in displayed color is explained using CIE 1976 chromaticity diagram coordinates. The region is divided into 4-millimeter square sections, and the average values ​​of the L*, a*, and b* values ​​of the light emitted from the ultraviolet-excited luminescent material within each section are calculated using existing technology. In the gradation region, under uniform ultraviolet irradiation, it is preferable that the difference in the average L* values, the difference in the average a* values, and / or the difference in the average b* values ​​between adjacent 4-millimeter square sections is within 30°. This enables natural and smooth pictorial expression.

[0029] Desirably, in the gradation region, the difference in the average value of the L* value between adjacent 4-millimeter square sections may be within 20, the difference in the average value of the a* value may be within 20, and / or the difference in the average value of the b* value may be within 20. This makes it possible to easily determine the presence of gradation and to express delicate pictures.

[0030] Preferably, in the gradation region, the difference in the average value of the L* value between adjacent 4-millimeter square sections may be within 10, the difference in the average value of the a* value may be within 10, and / or the difference in the average value of the b* value may be within 10. This enables a delicate pictorial representation in which the presence of gradation is barely discernible.

[0031] In the gradation region, the brightness changes, for example, by an L* value of 20 or more. The brightness may also change desirably by 40 or more, and preferably by 60 or more. This allows for a clear depiction of the difference between day and night.

[0032] The ultraviolet-excited luminescent material of the sea of ​​clouds 521 (specific figure) contains a pigment. By including a pigment, the sea of ​​clouds 521 in this embodiment provides sufficient in-plane change in the displayed color with high reproducibility. As described above, the in-plane change in the displayed color is measured, for example, based on the amount of change in coordinates in the L*a*b* color space defined by the International Commission on Illumination (CIE 1976). Meanwhile, as will be described in more detail below, the second figure, to which dye is applied with a brush or the like, is suitable for a flat display without gradation. The moon 522 contains dye, for example, applied with a brush.

[0033] Furthermore, the UV-excited luminescent material of the sea of ​​clouds 521 (specific figure) has pigment spray marks. Pigment spray marks are traces of pigment spray. When observing the pigment spray marks, the outline of the colorant-applied area is unclear, and when the outline is magnified, it is possible to confirm that the colorant is dispersed in discrete areas. Pigment spray marks refer to any of the following conditions (A) to (D) that can be observed when observed under black light and magnified, for example, using a 50x magnifying glass: (A) Dots of pigment-containing paint are scattered at intervals. (B) The paint density is increased, and the dots of pigment-containing paint are partially bonded together, forming spots. (C) The paint density is further increased, and the pigment-containing paint forms a mottled pattern with no gaps. (D) One or more types of pigment-containing paint that are different in type (density, chromaticity, saturation, and / or brightness) and are in any of the conditions (A) to (C) are superimposed on the above (A) to (C).

[0034] The process of forming the second graphic layer 52 corresponding to the sea of ​​clouds 521 includes, for example, a spraying process of spraying an ultraviolet-excited luminescent material using an airbrush. An airbrush, also known as an air sprayer, is a device that applies color material to an object by spraying it. Spraying with an airbrush can blur contours. In particular, when pigments are used as color materials, superior gradation effects can be achieved compared to when dyes are used. This is because pigments are insoluble in solvents and are granular, resulting in a state in which the density gradually changes across the surface. In contrast, dyes are soluble in solvents and have a uniform density throughout the solvent. The spraying process is also suitable for mechanization using robots.

[0035] It is preferable that the spraying of the color material corresponding to the sea of ​​clouds 521 (specific figure) be carried out in multiple steps. Spraying the color material in multiple steps means that there are steps of spraying color material at different concentrations, spraying color material at different mixing ratios, and / or spraying color material over different spray areas. The number of times that the color material is sprayed in multiple steps is at least two or more, preferably three or more, and more preferably five or more.

[0036] The spraying process of the color material corresponding to the sea of ​​clouds 521 (specific graphic) includes, for example, at least a first spraying process of spraying a first color material and a second spraying process of spraying a second color material. The first color material used in the first spraying process and the second color material used in the second spraying process differ, for example, in the concentration of the color material and / or the mixing ratio of the multiple color materials. This makes it easy to ensure a sufficient degree of change in the displayed color, especially when pigments are used as the color material.

[0037] The spraying process of the color material corresponding to the sea of ​​clouds 521 (specific figure) involves, for example, overlapping the spray ranges of the color material and varying the spray density of the color material. In the overlapping region where two color materials are sprayed, the density of each of the two color materials preferably decreases as the degree of overlap increases from the beginning of the overlap. This allows, particularly when pigments are used as color materials, one color to gradually lighten and the other color to gradually darken in the overlapping region, resulting in a change from one color to the other within the surface. For example, if one color is orange and the other is red, the displayed color in the overlapping region gradually changes from orange to red within the surface.

[0038] It is preferable that the second graphic layer 52 is included in the upper half of the illuminated object 5 when the second illuminating lamp 22 illuminates the illuminated object 5 from above, and is included in the lower half of the illuminated object 5 when the second illuminating lamp 22 illuminates the illuminated object 5 from below. This results in the second graphic layer 52 being located close to the second illuminating lamp 22. The second illuminating lamp 22 can then be specifically configured to illuminate the second graphic layer 52 in an optimal manner, thereby achieving an expressive gradation effect.

[0039] The relationship between the first graphic layer 51 and the second graphic layer 52 will be described with reference to Figures 2(a) to 2(c). Figure 2(b) shows the illuminated object 5 observed when only the first illuminating lamp 21 is turned on. As shown in Figure 2(b), the first graphic layer 51 depicts the first graphic of Mt. Fuji, white clouds, and the sky on the illuminated object 5. It can also be said that the first graphic layer 51 includes, for example, the sky, white clouds, and Mt. Fuji as the first graphic. Figure 2(c) shows the illuminated object 5 observed when the second illuminating lamp 22 is turned on and ultraviolet light is irradiated onto the illuminated object 5. As shown in Figure 2(c), the second graphic layer 52 depicts the second graphic. The second graphic layer 52 includes a second graphic layer 52 depicting a sea of ​​clouds 521 and a second graphic layer 52 depicting the moon 522. The sea of ​​clouds 521 includes a sea of ​​clouds 521a dyed yellow-orange, a sea of ​​clouds 521b dyed orange, and a sea of ​​clouds 521c dyed red. The sea of ​​clouds 521a contains a pigment that emits yellow-orange fluorescence. The sea of ​​clouds 521b contains a pigment that emits orange phosphorescence. The sea of ​​clouds 521c contains a pigment that emits red phosphorescence. The second graphic layer 52 corresponding to the sea of ​​clouds 521a, the second graphic layer 52 corresponding to the sea of ​​clouds 521b, and the second graphic layer 52 corresponding to the sea of ​​clouds 521c are partially overlapped with each other.

[0040] The density of the ultraviolet-excited luminescent material (pigment) in the sea of ​​clouds 521a gradually decreases as it overlaps with the sea of ​​clouds 521b. On the other hand, the density of the ultraviolet-excited luminescent material (pigment) in the sea of ​​clouds 521b gradually decreases as it overlaps with the sea of ​​clouds 521a. For example, from the sea of ​​clouds 521a to the sea of ​​clouds 521b, in these overlapping regions, the ratio of the yellow-orange ultraviolet-excited luminescent material changes from 100% to 0%, and the ratio of the orange ultraviolet-excited luminescent material changes from 0% to 100%.

[0041] The moon 522 (second graphic layer 52) does not have a gradation area. The moon 522 contains, for example, an ultraviolet-excited luminescent material such as a dye or a pigment. The moon 522 preferably contains an ultraviolet-excited luminescent material such as a dye. The moon 522 is preferably applied with a brush rather than an airbrush. This allows the outline of the moon 522 to stand out.

[0042] 2 is a block diagram showing an example of the hardware configuration of the information processing device 1 according to this embodiment. The information processing device 1 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a bus 14, an input / output interface 15, an output unit 16, an input unit 17, a storage unit 18, a communication unit 19, and a drive 20.

[0043] The CPU 11 executes various processes in accordance with programs recorded in the ROM 12 or programs loaded from the storage unit 18 into the RAM 13. The RAM 13 also stores data and the like required for the CPU 11 to execute various processes. The CPU 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output interface 15 is also connected to this bus 14.

[0044] The input / output interface 15 is connected to an output unit 16, an input unit 17, a storage unit 18, a communication unit 19, and a drive 20. The output unit 16 is composed of a display, a speaker, etc., and outputs various information as images and sounds. The input unit 17 is composed of a keyboard, a mouse, etc., and inputs various information. The storage unit 18 is composed of a hard disk, a DRAM (Dynamic Random Access Memory), etc., and stores various data. The communication unit 19 communicates with other devices via a network including the Internet.

[0045] Removable media 201, such as a magnetic disk, optical disk, magneto-optical disk, or semiconductor memory, is appropriately attached to the drive 20. Programs read from the removable media 201 by the drive 20 are installed in the storage unit 18 as needed. The removable media 201 can also store various data stored in the storage unit 18 in the same way as the storage unit 18.

[0046] <Functional Configuration of Information Processing Device 1> FIG. 3 is a functional block diagram showing an example of the functional configuration of the information processing device 1, the lighting device 2, and the sound device 3. As shown in FIG.

[0047] In the CPU 11 of the information processing device 1, a pattern acquisition unit 111 and a pattern output unit 112 function during operation.

[0048] Furthermore, the storage unit 18 of the information processing device 1 is provided with various databases. The databases include, for example, an irradiation pattern DB 181 and a sound source DB 182 that stores sound sources. The irradiation pattern DB 181 stores images displayed on the illuminated object 5 and irradiation patterns of light emitted from the lighting devices 2 associated with the images. The irradiation pattern DB 181 may store multiple irradiation patterns. The sound source DB 182 stores, for example, audio data in MP3 format and playback patterns of the audio data.

[0049] The pattern acquisition unit 111 acquires which of the preset image patterns of visible light and ultraviolet light linked to the illuminated object 5 is to be selected. The pattern acquisition unit 111 further acquires illumination patterns for the first illuminating light 21 and the second illuminating light 22 from the illumination pattern DB 181, and acquires a playback pattern of audio data from the sound source DB 182. The pattern output unit 112 transmits the pattern of voltage and current (illumination pattern) to be output to the first illuminating light 21 and the second illuminating light 22 to the illumination light control unit 23 via the communication unit 19 and the communication device 4. In parallel, the pattern output unit 112 transmits the playback pattern of the sound source to the audio device 3 via the communication unit 19 and the communication device 4.

[0050] The pattern output unit 112 outputs a lighting pattern and changes the display of the pictorial representation of the illuminated object 5. An example will be described in which the output from the pattern output unit 112 starts in the daytime, changes from yellow-orange to red, and then displays a picture of Mount Fuji with the moon rising at night. In the following example, lighting devices 2 not shown in FIG. 1 are present. One lighting device 2 illuminates the illuminated object 5 centered on half of the Y1 direction, and the other lighting device 2 illuminates the illuminated object 5 centered on half of the Y2 direction. Unless otherwise specified, the lighting control unit 23 simultaneously and identically controls one and the other lighting devices 2. Hereinafter, the description will be given without distinguishing between the one and the other lighting devices 2 unless otherwise specified.

[0051] First, to express Mount Fuji in the daytime, the lighting control unit 23 turns on only the first lighting unit 21 to irradiate the illuminated object 5 with visible light. At this time, the lighting control unit 23 turns off the second lighting unit 22. The second graphic layer 52 shown in FIG. 2(a) is transparent in the visible light wavelength range. Visible light emitted from the first lighting unit 21 passes through the second graphic layer 52. The visible light is reflected by the surface of the first graphic layer 51, and a picture of Mount Fuji painted with ordinary oil paints, for example, is expressed.

[0052] Next, the lighting control unit 23 gradually turns off the first lighting unit 21 and gradually turns on the second lighting unit 22. The lighting control unit 23 controls the second lighting unit 22 to irradiate ultraviolet light onto the white clouds drawn at the base of Mt. Fuji. The ultraviolet light excites the ultraviolet-excited luminescent material contained in the second graphic layer 52 shown in Figures 2(a) and 2(c), causing it to emit visible light.

[0053] As a result, the patterns that were visible with visible light gradually become invisible, and at the same time, the patterns that were invisible with visible light begin to appear to glow. As shown in Figures 2(b) and 2(c) and described above, the sea of ​​clouds 521a emits a yellow-orange light, the sea of ​​clouds 521b emits an orange light, and the sea of ​​clouds 521c emits a red light, and they overlap each other. At the overlapping portions, the pigment densities gradually change, so the emitted light mixes between yellow-orange, orange, and red, and the displayed color gradually changes. A color gradation is achieved within the surface. The yellow-orange, orange, and red lights emitted from the sea of ​​clouds 521 are observed by the viewer together with the image of Mt. Fuji provided by the first graphic layer 51.

[0054] Furthermore, based on this pattern, the lighting control unit 23 irradiates ultraviolet light from the second lighting unit 22 of one of the lighting devices 2 onto the half of the illuminated object 5 on the Y1 side, while keeping the first lighting unit 21 off. Since the second graphic layer 52 is not located above Mount Fuji, no light is emitted, and a dark sky is expressed as shown in Figure 2(c). The fluorescent material made of the dye material of the second graphic layer 52 corresponding to the moon 522 shines white with a clear outline in the dark screen.

[0055] The illumination light control unit 23 turns off the second illumination light 22 of one of the illumination devices 2. This causes the second graphic layer 52 to stop emitting light.

[0056] Returning to the beginning, in order to represent Mount Fuji in the daytime, the illumination light control unit 23 turns on only the first illumination light 21 to irradiate the illuminated object 5 with visible light. At this time, the illumination light control unit 23 turns off the second illumination light 22.

[0057] <Evaluation Results> Hereinafter, the effect of the gradual change in display color across the screen will be referred to as the “gradation effect.” The degree to which the physical relaxation effect resulting from the gradation effect was obtained was evaluated.

[0058] In this embodiment, as described above, the plurality of second graphic layers 52 partially overlap each other, and the colors emitted in the overlapping areas of the layers gradually blend together, realizing a natural display in which the boundaries are indistinguishable. In the above example, from the sea of ​​clouds 521a to the sea of ​​clouds 521b, the ultraviolet-excited luminescent material gradually changes and blends in color from yellow-orange, orange, and red, realizing a natural display in which the boundaries are indistinguishable.

[0059] In the process of applying color material to the second graphic layer 52 corresponding to the sea of ​​clouds 521, the type of color material (dye or pigment), the method of applying the color material (brush or airbrush), the number of times the color material was applied, and whether or not the concentration of the color material, the mixing ratio of the color material, and the area to which the color material was applied were changed when the color material was applied in multiple steps were changed are shown in Figure 5.

[0060] The evaluation results were calculated by 10 experts exchanging opinions and rating them, with 100 being the highest and 0 being the lowest, and the average score was calculated. The criteria were set as follows: 100 means a relaxing effect that brings tears to your eyes, 60 means a relaxing effect that does not bring tears but clearly causes your body to relax (for example, your mouth to drop open), 30 means a relaxing effect that makes you want to lean back in your chair, and 0 means no relaxing effect can be expected.

[0061] The evaluation results are shown in Figure 5. In the process of applying the color material of the second graphic layer 52 in multiple steps so that the display color gradually changes across the surface, the type of color material (dye or pigment), the method of applying the color material (brush or airbrush), the number of times the color material was applied, and whether or not the concentration of the color material, the mixing ratio of the color material, and the application area of ​​the color material were changed when the color material was applied in multiple steps were all changed.

[0062] <Evaluation 1> When applying the colorant in three separate steps while changing the concentration of the colorant, a comparison was made between a case where the colorant concentration was changed from low to high and a case where the colorant concentration was changed from high to low. The case where the colorant concentration was changed from low to high showed better evaluation results. The evaluation results shown in Figure 5 are for a case where the colorant concentration was changed from low to high.

[0063] <Evaluation 2> When applying colorant in three steps while changing the mixing ratio of the colorant, a comparison was made between a method in which the application was performed while changing from a colorant with low brightness to a colorant with a method in which the application was performed while changing from a colorant with high brightness to a colorant with low brightness. The method in which the application was performed while changing from a colorant with low brightness to a colorant with high brightness showed better evaluation results. Regarding saturation instead of brightness, the method in which the application was performed while changing from a colorant with low saturation to a colorant with high saturation showed better evaluation results.

[0064] The evaluation results shown in FIG. 5 are obtained when the brightness of the mixed coloring material was changed from low to high.

[0065] <Evaluation 3> An investigation was conducted on the case where the colorant was applied in three separate steps while changing the application area of ​​the colorant. A comparison was made between the case where the application area of ​​the colorant was changed from a wide application area to a narrow application area (narrowing the application area) and the case where the application area was changed from a narrow application area to a wide application area (widening the application area). The case where the application area was changed from a wide application area to a narrow application area (narrowing the application area) showed better evaluation results. The evaluation results shown in Figure 5 are for the case where the application area of ​​the colorant was changed from a wide application area to a narrow application area (narrowing the application area). Based on the evaluation, the following technical findings were obtained.

[0066] Pigments are superior to dyes in terms of coloring materials. There is a notable difference, particularly in terms of whether they can express high brightness. When dyes are used, even if the coloring material is applied multiple times while changing the coloring material concentration, mixing ratio, and application area, only a flat gradation can be obtained.

[0067] The airbrush is a better application method than the brush. A single application of color with an airbrush produces the same results as applying the color with a brush two or three times, and it also reduces the amount of time required.

[0068] It is preferable to apply the coloring material in multiple steps. This method is particularly effective when the coloring material is a pigment. When the coloring material is a pigment, thick application is possible, and higher brightness can be achieved.

[0069] When applying the coloring material in multiple steps, it is desirable to change the concentration of the coloring material, preferably from a low concentration to a high concentration.

[0070] When applying color materials in multiple steps, it is desirable to vary the mixing ratio of the multiple color materials. Although the lower limit of the mixing ratio may be 0% (no color materials are mixed), it is desirable to mix multiple color materials (not 0%) at least in the application of color materials except for the first and last application. Furthermore, better results can be obtained by mixing multiple color materials in all application of color materials in each application. It is desirable that the later the color materials are applied, the higher their lightness and / or saturation.

[0071] When the coloring material is applied in multiple steps, it is preferable to apply the coloring material while changing the application area, and it is particularly preferable to apply the coloring material while gradually narrowing the application area.

[0072] Of the methods of changing the concentration of the colorant, changing the mixing ratio of the colorant, and changing the application area of ​​the colorant, the most effective method is to change the application area of ​​the colorant. If the colorant is a dye, changing the application area of ​​the colorant will not be effective enough, but if the colorant is a pigment, changing (e.g., narrowing) the application area of ​​the colorant will have a clear effect.

[0073] <Temporal Gradation> So far, we have mainly described the lighting system 100 that creates a sea of ​​clouds 521 with an in-plane gradation. The sea of ​​clouds 521 may have a gradation region in which, under irradiation with ultraviolet light, light emission from an ultraviolet-excited luminescent substance whose hue, lightness, and / or saturation gradually change over time is observed. Hereinafter, this type of gradation will be referred to as a temporal gradation, and a region exhibiting a temporal gradation will be referred to as a temporal gradation region.

[0074] The area where the sea of ​​clouds 521a, 521b, and 521c overlap is the temporal gradation area where the temporal gradation is realized. The sea of ​​clouds 521a, 521b, and 521c overlap at the position indicated by the symbol P in Figures 1 and 2C. The change in the expression color at this position will be described below.

[0075] The sea of ​​clouds 521a shown in FIG. 2(c) emits yellow-orange light. The sea of ​​clouds 521a is formed by a second graphic layer 52 having a fluorescent material that emits yellow-orange light when exposed to ultraviolet light. The sea of ​​clouds 521b shown in FIG. 2(c) emits orange light. The sea of ​​clouds 521b is formed by a second graphic layer 52 having a phosphorescent material that emits orange light when exposed to ultraviolet light. The orange-emitting phosphorescent material emits phosphorescence a predetermined time, for example, 30 seconds, after ultraviolet light irradiation has begun. The orange-emitting phosphorescent material continues to emit phosphorescence for a predetermined time, for example, approximately 30 seconds, after ultraviolet light irradiation has ceased. The sea of ​​clouds 521c shown in FIG. 2(c) emits red light. The sea of ​​clouds 521c is formed by a second graphic layer 52 having a phosphorescent material that emits red light when exposed to ultraviolet light. The red-emitting phosphorescent material emits phosphorescence after a longer time has elapsed since irradiation with ultraviolet light than the orange-emitting phosphorescent material. The red-emitting phosphorescent material emits phosphorescence after removal of ultraviolet light than the orange-emitting phosphorescent material. The red-emitting phosphorescent material emits phosphorescence, for example, one minute after irradiation with ultraviolet light. The red-emitting phosphorescent material emits phosphorescence, for example, for about one minute after removal of ultraviolet light.

[0076] FIG. 6 shows the relationship between the illuminance of ultraviolet light irradiated onto the illuminated object 5 and the resulting color change. FIG. 6( a) shows the change in ultraviolet light irradiance over time. The horizontal axis represents elapsed time, and the vertical axis represents ultraviolet light irradiance. FIG. 6( b) shows the change in luminescence intensity from the fluorescent material and the phosphorescent material over time. The horizontal axis represents elapsed time, and the vertical axis represents luminescence intensity. The horizontal axes coincide in FIGS. 6( a) and 6(b). The pattern output unit 112 outputs an irradiation pattern. The illumination light control unit 23 irradiates ultraviolet light onto the sea of ​​clouds 521a, 521b, and 521c from the second illumination light 22 in accordance with the irradiation pattern signal. As shown in FIG. 6( a), the illumination light control unit 23 irradiates ultraviolet light by gradually increasing the illuminance from time t1 during the first period. Thereafter, from a second period starting at time t2 to a fourth period starting at time t4, the illuminating lamp control unit 23 irradiates ultraviolet light from the second illuminating lamp 22 in accordance with the output signal from the pattern output unit 112. The ultraviolet illuminance is kept constant during the second period.

[0077] When ultraviolet light with a time-dependent illuminance is applied as shown in FIG. 6( a), the yellow-orange fluorescent material representing the sea of ​​clouds 521a emits fluorescence as shown in FIG. 6( b). The illuminance of the ultraviolet light is gradually increased from time t1 during a first period. At this time, the emission intensity of the yellow-orange fluorescence gradually increases. The yellow-orange fluorescent material emits fluorescence without any time delay relative to the ultraviolet light irradiation, in proportion to the irradiation intensity. The initial display is yellow-orange. After a delay of, for example, Δt1, e.g., 30 seconds, from the start of ultraviolet light irradiation, the orange phosphorescent material of the sea of ​​clouds 521b emits light, and the intensity of the emitted light gradually increases. After a further delay of Δt2, the red phosphorescent material of the sea of ​​clouds 521c emits light, and the intensity of the emitted light gradually increases. The display color during the second period is a superposition of emitted colors, from yellow-orange to orange to red.

[0078] Next, as shown in FIG. 6A , the illuminance of the ultraviolet light is gradually reduced during a third period starting from time t2, and the light is turned off at time t3. The yellow-orange fluorescence of the sea of ​​clouds 521a decreases in sync with the decrease in ultraviolet irradiation intensity. The orange phosphorescence of the sea of ​​clouds 521b begins to decrease in luminescence intensity after a predetermined time Δt3, e.g., 30 seconds. The red phosphorescence of the sea of ​​clouds 521c begins to decrease in luminescence intensity after a further time Δt4, e.g., 30 seconds, i.e., one minute after the ultraviolet irradiation intensity begins to decrease. The display of the sea of ​​clouds 521 shifts from a state in which yellow-orange, orange, and red are superimposed, to a state in which the yellow-orange disappears, then the orange disappears, leaving only the red, and finally the red also disappears.

[0079] The illumination light control unit 23 may gradually decrease the illumination intensity of visible light from the first illumination light 21 in synchronization with gradually increasing the illumination intensity of ultraviolet light from the second illumination light 22 in accordance with the illumination pattern signal. This gradually decreases the influence of visible light, improves the color purity of the light emitted from the ultraviolet-excited luminescent material, and realizes an expression that more attracts the observer. The illumination light control unit 23 may gradually increase the illumination intensity of visible light from the first illumination light 21 in synchronization with gradually decreasing the illumination intensity of ultraviolet light from the second illumination light 22 in accordance with the illumination pattern signal. This gradually increases the influence of visible light, gradually decreases the color purity of the light emitted from the ultraviolet-excited luminescent material, and realizes a gentler expression.

[0080] The above embodiment of the invention has been described focusing on yellow-orange, orange, and red. The configuration will now be described in more general terms. The lighting system 100 according to the embodiment can continuously change the display color through a series of hues: yellow-orange, orange, red, red-purple, blue-purple, blue, green-blue, blue-green, green, yellow-green, and yellow. The illuminated object 5 includes, in order of hue, a fluorescent material, a phosphorescent material with a predetermined light-storing time, and a light-storing material with a light-storing time longer than the predetermined light-storing time. The order of the displayed colors is the order of the hues on the color wheel (including both ascending and descending order). The illuminated object 5 includes a phosphorescent material with a long light-storing time for a color that is displayed later. For example, the illuminated object 5 preferably includes a yellow-orange fluorescent material, an orange phosphorescent material with a predetermined light-storing time, and a red light-storing material with a light-storing time longer than the predetermined light-storing time. This allows the lighting system 100 to realize a display with a temporal gradation that changes from yellow-orange to orange to red. For example, it is preferable that the illuminated object 5 has a green fluorescent material, a blue-green phosphorescent material with a predetermined light-storing time, and a blue light-storing material with a light-storing time longer than the predetermined light-storing time. This realizes a display that changes from green to blue-green to blue. A phosphorescent material with a light-storing time shorter than the predetermined light-storing time may be used as the fluorescent material.

[0081] (Other Embodiments) Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. within the scope of achieving the object of the present invention are included in the present invention.

[0082] Furthermore, for example, the above-described series of processes can be executed by hardware or software. In other words, the above-described functional configuration is merely an example and is not particularly limited. In other words, it is sufficient that the lighting device 2 and the information processing device 1 are provided with a function that can execute the above-described series of processes as a whole, and the functional blocks used to realize this function are not particularly limited to the above-described example.

[0083] The location of the functional blocks is not particularly limited and may be arbitrary. For example, the functional blocks of the information processing device 1 may be transferred to another device, or the functional blocks of another device may be transferred to a server. Furthermore, one functional block may be configured as a single piece of hardware, a single piece of software, or a combination of these.

[0084] When a series of processes is executed by software, the programs constituting the software are installed onto a computer or the like from a network or a recording medium. The computer may be a computer incorporated into dedicated hardware. The computer may also be a computer capable of executing various functions by installing various programs, such as a server, a general-purpose smartphone, or a personal computer.

[0085] The recording medium containing such a program may be configured as a removable medium (not shown) that is distributed separately from the device main body in order to provide the program to users, etc., or may be configured as a recording medium that is pre-installed in the device main body and provided to users, etc. Since the program can be distributed via a network, the recording medium may be installed in or accessible from a computer that is connected or connectable to the network.

[0086] In other words, the lighting device 2 to which the present invention is applied can take various forms having the following configurations.

[0087] (1) The illumination device (illumination device 2 in FIG. 1) is an illumination device that illuminates an illuminated object (illuminated object 5 in FIG. 1) having a graphic including an image and / or a character on its surface, and includes a first illumination lamp (first illumination lamp 21 in FIG. 1) that can irradiate the illuminated object with visible light, a second illumination lamp (second illumination lamp 22 in FIG. 1) that can irradiate the illuminated object with ultraviolet light, and an illumination lamp control means (illumination lamp control section 23 in FIG. 1) that can control the first illumination lamp and the second illumination lamp, and the illuminated object includes a substrate (substrate 50 in FIG. 1) and a first graphic layer (first graphic layer 51 in FIG. 1) having a first graphic formed on the substrate. and a second graphic layer (second graphic layer 52 in FIG. 1 ) formed on the opposite side of the first graphic layer from the substrate and having a second graphic, wherein the first graphic is visible under visible light, the second graphic layer contains an ultraviolet-excited luminescent material that emits visible light when irradiated with ultraviolet light, the second graphic is visible under ultraviolet light, and the second graphic includes a specific graphic (e.g., a sea of ​​clouds 521 in FIG. 1 ), the ultraviolet-excited luminescent material in the second graphic layer corresponding to the specific graphic contains a pigment, and the second graphic layer corresponding to the specific graphic has traces of pigment spraying. This provides an illumination device that can stably and reproducibly produce pictures and the like that can express even landscapes with delicate gradations using a method supported by technical knowledge.

[0088] (2) In the lighting device, the first illuminating lamp has a color temperature of 4000 K or less. This allows for the display of gentle colors, particularly warm colors that have a high relaxation effect.

[0089] (3) In the lighting device, the second graphic layer corresponding to the specific graphic has a plurality of layers, and has a region where the plurality of layers are stacked and / or a region where the plurality of layers do not overlap, thereby realizing a display with gradation.

[0090] (4) The illuminated object has a graphic including an image and / or letters on its surface and is illuminated with visible light and ultraviolet light, and comprises a substrate, a first graphic layer having a first graphic formed on the substrate, and a second graphic layer formed on the opposite side of the first graphic layer from the substrate and having a second graphic, wherein the first graphic is visible under visible light, the second graphic layer has an ultraviolet-excited luminescent material that emits visible light when irradiated with ultraviolet light, the second graphic is visible under ultraviolet light, the second graphic includes a specific graphic, the ultraviolet-excited luminescent material of the second graphic layer corresponding to the specific graphic includes a pigment, and the second graphic layer corresponding to the specific graphic has pigment spray marks.

[0091] (5) A method for manufacturing an illuminated object is a method for manufacturing an illuminated object having a graphic including an image and / or letters, the illuminated object comprising a substrate, a first graphic layer having a first graphic formed on the substrate, and a second graphic layer formed on the opposite side of the first graphic layer from the substrate and having a second graphic, the first graphic being visible under visible light, the second graphic layer having an ultraviolet-excited luminescent material that emits visible light when irradiated with ultraviolet light, the second graphic being visible under ultraviolet light, the second graphic including a specific graphic, and the ultraviolet-excited luminescent material of the second graphic layer corresponding to the specific graphic including a pigment, the method for manufacturing an illuminated object comprising a step of forming the specific graphic by arranging the ultraviolet-excited luminescent material including the pigment using an airbrush.

[0092] REFERENCE SIGNS LIST 1 Information processing device, 2 Lighting device, 3 Sound device, 4 Communication device, 5 Illuminated object, 11 CPU, 18 Memory unit, 19 Communication unit, 21 First lighting lamp, 22 Second lighting lamp, 23 Lighting lamp control device, 31 Sound source reproduction unit, 32 Speaker, 50 Base material, 51 First graphic layer, 52 Second graphic layer, 521 Sea of ​​clouds, 522 Moon, 100 Lighting system, 111 Pattern acquisition unit, 112 Pattern output unit, 181 Irradiation pattern DB, 182 Sound source DB

Claims

1. A lighting device for illuminating an illuminated object having a graphic including an image and / or character on its surface, comprising: a first lighting lamp capable of irradiating the illuminated object with visible light; a second lighting lamp capable of irradiating the illuminated object with ultraviolet light; and a lighting lamp control means for controlling the first lighting lamp and the second lighting lamp; wherein the illuminated object comprises: a substrate; a first graphic layer having a first graphic formed on the substrate; and a second graphic layer having a second graphic formed on the opposite side of the first graphic layer from the substrate; wherein the first graphic is visible under visible light, the second graphic layer comprises an ultraviolet-excited luminescent material that emits visible light when irradiated with ultraviolet light, the second graphic is visible under ultraviolet light, the second graphic includes a specific graphic, the ultraviolet-excited luminescent material of the second graphic layer corresponding to the specific graphic contains a pigment, and the second graphic layer corresponding to the specific graphic has pigment spray marks.

2. The lighting device according to claim 1, wherein the first lighting lamp has a color temperature of 4000K or less.

3. The lighting device according to claim 1, wherein the second graphic layer corresponding to the specific graphic has a plurality of layers and has an area where the plurality of layers are stacked and / or an area where the plurality of layers do not overlap.

4. An illuminated object having a graphic including an image and / or letters on its surface and irradiated with visible light and ultraviolet light, comprising: a substrate; a first graphic layer having a first graphic formed on the substrate; and a second graphic layer having a second graphic formed on the opposite side of the first graphic layer from the substrate, wherein the first graphic is visible under visible light, the second graphic layer has an ultraviolet-excited luminescent material that emits visible light when irradiated with ultraviolet light, the second graphic is visible under ultraviolet light, the second graphic includes a specific graphic, the ultraviolet-excited luminescent material of the second graphic layer corresponding to the specific graphic contains a pigment, and the second graphic layer corresponding to the specific graphic has pigment spray marks.

5. A method for manufacturing an illuminated object having a graphic including an image and / or text, the illuminated object comprising: a substrate; a first graphic layer having a first graphic formed on the substrate; and a second graphic layer formed on the opposite side of the first graphic layer from the substrate and having a second graphic, the first graphic being visible under visible light, the second graphic layer comprising an ultraviolet-excited luminescent material that emits visible light when irradiated with ultraviolet light, the second graphic being visible under ultraviolet light, the second graphic comprising a specific graphic, and the ultraviolet-excited luminescent material of the second graphic layer corresponding to the specific graphic comprising a pigment, the method for manufacturing an illuminated object comprising: a step of forming the specific graphic by arranging the ultraviolet-excited luminescent material comprising the pigment using an airbrush.

Images