Color conversion system and color conversion method

Abstract

For example, display any color on a predetermined medium such as a watch, jewelry, nails, etc. The color conversion system is a color conversion system that converts the color of, for example, the windshield glass 42 of the clock 4, and includes an illumination device 2 that irradiates visible light and ultraviolet light, and a mobile terminal 1 that controls the irradiation of the visible light and ultraviolet light of the illumination device 2. The illumination device 2 irradiates the windshield glass 42 having the photochromic layer 61 with ultraviolet light from the UV light source 55 and visible light of red, green, and blue from each of the three-color LED light sources 56a, 56b, and 56c. The mobile terminal 1 controls the illumination device 2 to irradiate the windshield glass 42 with ultraviolet light from the UV light source 55 to cause the windshield glass 42 to develop color, and irradiate the windshield glass 42 with visible light of the red, green, and blue from each of the LED light sources 56a, 56b, and 56c to fade the windshield glass 42.

Description

Technical Field

[0001] The present invention relates to a color conversion system and a color conversion method.

Background Art

[0002] There are known photochromic materials whose structure changes upon irradiation with light and whose color changes. For example, when irradiated with ultraviolet rays, a photochromic material develops color with respect to a transparent state. Then, when irradiated with visible light in the colored state, the photochromic material returns to the transparent state. Conventionally, a technique for performing writing and erasing using a photochromic compound has been proposed. Specifically, a color conversion system has been proposed that performs coloring and fading on a writing instrument using a photochromic material and a coating film applied by the writing instrument (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, with only a conventional color conversion system, it has not been possible to display an arbitrary color.

[0005] The present invention has been made in view of such circumstances, and an object thereof is to enable an arbitrary color to be displayed on a predetermined medium.

Means for Solving the Problems

[0006] To achieve the above object, a color conversion system according to one aspect of the present invention is In a color conversion system for converting the color of a predetermined medium, The predetermined medium having a photochromic layer, An illumination device that irradiates the predetermined medium with ultraviolet light from an ultraviolet light source and visible light of red, green, and blue from each of the red, green, and blue visible light sources, An information processing device that controls the irradiation of the illumination device, Comprising The photochromic layer has three types of photochromic materials that develop colors into cyan, magenta, and yellow respectively by irradiation with the ultraviolet light from the illumination device, The information processing device Color conversion control means for executing control to convert the predetermined medium to a predetermined color by irradiating the ultraviolet light from the ultraviolet light source of the illumination device to cause the predetermined medium to develop color, and irradiating the visible light of red, green, and blue from each of the red, green, and blue visible light sources of the illumination device under the conditions necessary to convert the visible light to the predetermined color to cause the predetermined medium to fade, Having A color conversion method corresponding to the color conversion system of one aspect of the present invention is also provided as a color conversion method of one aspect of the present invention.

Advantages of the Invention

[0007] According to the present invention, an arbitrary color can be displayed on a predetermined medium.

Brief Description of the Drawings

[0008]

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, referring to FIG. 1, an overview of the color conversion system according to the first embodiment of the present invention will be described. FIG. 1 is a diagram showing an overview configuration of a color conversion system according to the first embodiment of the present invention.

[0010] As shown in FIG. 1, the color conversion system according to the first embodiment of the present invention is a color conversion system that converts the color of a decoration (predetermined medium) such as the windshield 42 of the clock 4.

[0011] The color conversion system is configured such that a lighting device 2 that illuminates the windshield 42 of the clock 4 and a mobile terminal 1 that controls the lighting device 2 are interconnected via a wireless communication network such as Bluetooth. Note that Bluetooth is a registered trademark.

[0012] The lighting device 2 is operated by, for example, a store operator or the like, and the power supply is turned on or off. The lighting device 2 activated by turning on the power supply is controlled by the mobile terminal 1 and irradiates ultraviolet rays (UV light) or visible light onto a predetermined medium disposed at a predetermined position within the device.

[0013] In general, ultraviolet rays have a shorter wavelength than visible light and refer to electromagnetic waves in the range of 10 to 380 nm. Those with a wavelength longer than 380 nm are called visible light. The region (range) of 300 nm to 380 nm can be said to be the boundary area between ultraviolet rays and visible light.

[0014] Examples of the predetermined medium include, in addition to a clock, various ornaments such as nails, glasses, jewelry, contact lenses, shoes, bags, vehicles, etc. The configuration of the lighting device 2 corresponding to each ornament will be described later.

[0015] The mobile terminal 1 is managed by a store operator or the like. The mobile terminal 1 executes various processes while controlling the light emission operation of the lighting device 2.

[0016] FIG. 2 is a block diagram showing the hardware configuration of the mobile terminal in the color conversion system of FIG. 1.

[0017] The mobile terminal 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.

[0018] The CPU 11 executes various processes according to a program recorded in the ROM 12 or a program loaded from the storage unit 18 into the RAM 13. In the RAM 13, data and the like necessary for the CPU 11 to execute various processes are also appropriately stored.

[0019] 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. An output unit 16, an input unit 17, a storage unit 18, a communication unit 19, and a drive 20 are connected to the input / output interface 15.

[0020] 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.

[0021] 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 (the lighting device 2 in the example of FIG. 1) via a wireless communication network.

[0022] A removable medium 21 made of a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, etc., is appropriately mounted on the drive 20. The program read from the removable medium 21 by the drive 20 is installed in the storage unit 18 as necessary. Also, the removable medium 21 can store various data stored in the storage unit 18 in the same manner as the storage unit 18.

[0023] FIG. 3 is a block diagram showing the functional configuration of the mobile terminal having the hardware configuration of FIG. 2, the configuration of the lighting device 2, and the structure of a predetermined medium, among the color conversion systems of FIG. 1. As shown in FIG. 3, this color conversion system includes a lighting device 2, a color conversion layer 60 disposed on the surface or inside the glass of the windscreen 42 of the clock 4 as a predetermined medium, and a mobile terminal 1. In the case of this color conversion system, the mobile terminal 1 controls the irradiation of visible light and UV light by the lighting device 2, and the lighting device 2 irradiates the windshield glass 42 of the clock 4 with visible light and UV light based on the control from the mobile terminal 1. A color conversion layer 60 is disposed on the surface of the windshield glass 42. By irradiating the color conversion layer 60 with UV light and visible light in sequence, the color of the color conversion layer 60 changes (after coloring, fading), and the colorless and transparent windshield glass 42 under the color conversion layer 60 also changes to colored and transparent.

[0024] First, the functional configuration of the mobile terminal 1 will be described. As shown in FIG. 3, in an area of the storage unit 18 of the mobile terminal 1 (also refer to FIG. 2), color information, light source control information, etc. are stored. The color information is information that associates the color displayed on the UI (User Interface: for example, the screen of the mobile terminal 1 where the color selection button area 151 in FIG. 15 is arranged) where the user designates a color with the light source control information.

[0025] The light source control information is information (parameter values in FIG. 16) that parameterizes the applied voltages for driving the UV light source 55 and the LED light sources 56a, 56b, 56c of the lighting device 2 individually according to the color designated by the user on the UI, and information (number of seconds) including the light irradiation time of each light source. In FIG. 16, the preset parameter values are such that UV is, for example, 255, R (red) is 255, G (green) is 0, and B (blue) is 0.

[0026] In the CPU 11 of the mobile terminal 1, when controlling the color conversion operation of the lighting device 2, the UI providing unit 31 and the color conversion control unit 32 function.

[0027] The UI providing unit 31 provides the user with a UI (User Interface: for example, the screen of the mobile terminal 1 in FIGS. 15 and 16) for performing a designation operation for the user to designate a predetermined color from a plurality of colors.

[0028] The screen of the mobile terminal 1 provided by the UI providing unit 31 (see FIGS. 15 and 16) has a specified color inner instruction area (color selection button area 151 in FIG. 15) that accepts a specified operation for instructing a specified color (for example, red) from among a predetermined N colors (for example, 8 colors), and a customization instruction area (customization area 161 in FIG. 16) that accepts a specified operation for the user to customize and generate an arbitrary color and instruct the generated color as the specified color. In addition, the UI providing unit 31 also provides a page for the user to create a color and a screen of a sales site where the color created by the user is sold to others.

[0029] The color conversion control unit 32 receives the specified color specified by the specified operation performed on the UI (see FIG. 15), and notifies the illumination device 2 of control information (light source control information) for converting a predetermined medium into the specified color. Specifically, when, for example, the "red" button is specified in the color selection button area 151 of the screen in FIG. 15, the color conversion control unit 32 transmits light source control information for controlling each color LED light source for the "red" button to the illumination device 2 to express the color.

[0030] The color conversion control unit 32 irradiates the windshield glass 42 (strictly speaking, the color conversion layer 60) (predetermined medium) with ultraviolet rays (UV light) from the UV light source 55 of the illumination device 2 to cause the windshield glass 42 to develop color, and irradiates the windshield glass 42 with visible light of red, green, and blue from the respective LED light sources 56a, 56b, and 56c of the illumination device 2 with light source control information (conditions such as light irradiation intensity and irradiation time) necessary to convert the visible light into the specified color, and causes the windshield glass 42 to fade, thereby executing control to convert the windshield glass 42 into a preset color (specified color).

[0031] Specifically, the color conversion control unit 32 transmits light source control information to the illumination device 2. In the illumination device 2, the communication unit 51 receives the light source control information transmitted from the mobile terminal 1 and passes it to the light source driving unit 52. The light source driving unit 52 drives the UV light source 55 and the LED light sources 56a, 56b, and 56c based on the light source control information to irradiate light from each of them.

[0032] The light source control information is the parameter value of the applied voltage and the irradiation time for each color. The parameter value of the applied voltage divides the range from the maximum voltage capable of driving the light source to 0 (minimum) to 255 (maximum) into values, and any one of these values is sent. The light source driving unit 52 applies a voltage corresponding to the parameter value to the above light source to drive the light source to emit light. The irradiation time is the time during which the light source of each color irradiates the medium, for example, in seconds.

[0033] Subsequently, the configuration of the lighting device 2 will be described. The lighting device 2 includes a communication unit 51, a light source driving unit 52, a power supply unit 53, a housing for accommodating the clock 4, an ultraviolet light source (hereinafter referred to as "UV light source 55"), and LED light sources 56a, 56b, 56c as visible light sources. In the following, when it is not necessary to distinguish and describe each of the LED light sources 56a, 56b, 56c, they are referred to as the LED light source 56. The lighting device 2 includes an openable / closable lid and a case. On the back surface of the lid, the UV light source 55 and the LED light sources 56a, 56b, 56c are arranged. In the case, for example, the clock 4 is accommodated as a predetermined medium. The lighting device 2 irradiates the windbreak glass 42 inside the case with the UV light from the UV light source 55 and the visible light of red, green, and blue from each of the LED light sources 56a, 56b, 56c so that light from the outside does not enter when the lid is closed.

[0034] The communication unit 51 receives the light source control information by communicating with the mobile terminal 1. The light source driving unit 52 controls the UV light source 55 and the LED light source 56 based on the light source control information received from the mobile terminal 1. Specifically, the light source driving unit 52 individually drives each of the LED light sources 56a, 56b, 56c (drives by individually changing the applied voltage, irradiation time, etc.) based on the light source control information. The power supply unit 53 supplies power to each part of the lighting device 2.

[0035] Although not shown in FIG. 3, for example, it may be configured to have an optical system composed of a lens, a mirror, a mask, or the like. In this case, the mask is for forming an image on the photochromic layer 61, such as an optical mask, and is disposed between the opening of the housing and the UV light source and the LED light source. The optical mask is, for example, one in which a chromium layer is patterned on an optical glass. In addition to the LED light source, a laser light source may be used as the visible light source. When using a laser light source, the illumination device 2 may be configured such that the laser light source scans the laser light at high speed without using a mask.

[0036] A windproof glass 42 is provided on the upper surface of the main body of the clock 4. The windproof glass 42 has a color conversion layer 60 on its surface (upper surface). Before processing, the color conversion layer 60 is colorless and transparent, and the dial of the clock 4 can be seen through. The color conversion layer 60 includes a photochromic layer 61 disposed on the windproof glass 42 and a coating layer 62 disposed on the photochromic layer 61. Since the coating layer 62 is the outermost layer and is exposed to the outside, it is exposed to all daily light including sunlight. The color conversion layer 60 is a layer that develops color or fades (decolors) by irradiation with the above UV light and visible light, and is a layer that contributes to color conversion. After any color is realized in the color conversion layer 60, it can be exposed to natural light, particularly sunlight including visible light and UV light. In any photochromic material, fading due to visible light of the intensity of sunlight can be suppressed for a predetermined period. The predetermined period is, for example, from 1 day to 2 days (about 1 week depending on the medium and the usage environment of the medium).

[0037] The coating layer 62 has a UV light absorption wavelength region (for example, from 325 nm to 430 nm) and passes the UV light for color development (for example, wavelength 325 nm). The end of the absorption band of the coating layer 62 coincides with the wavelength of the UV light for color development, which is 325 nm. Specifically, the coating layer 62 absorbs UV light in a predetermined wavelength range of ultraviolet rays. For example, it absorbs UV light in the wavelength range from an ultraviolet wavelength Anm to an ultraviolet wavelength Bnm. For example, Anm is 325 nm and Bnm is 430 nm. Since the absorption at the absorption edge of the coating layer 62 is not 100%, at least a part of the UV light for color development passes through the coating layer 62.

[0038] On the other hand, the coating layer 62 absorbs the UV light (325 nm or more at the ground surface) contained in sunlight. In the display portion where color development and fading have occurred, at least most of the UV light (for example, from 325 nm to 430 nm) that promotes color development due to sunlight is not irradiated, and the display color of the color conversion layer 60 is maintained.

[0039] Since the UV light in this wavelength range is absorbed by this coating layer 62, the reach of the UV light in that wavelength range to the photochromic layer 61 is suppressed, and color development is suppressed. As described above, even when the color conversion layer 60 is exposed to sunlight, color development and fading are suppressed, and the color realized in the color conversion layer 60 is retained.

[0040] The photochromic layer 61 is transparent before UV light irradiation. The photochromic layer 61 has three types of photochromic materials that respectively develop colors into cyan that absorbs red, magenta that absorbs green light, and yellow that absorbs blue light when irradiated with UV light.

[0041] The photochromic material fades to transparency by irradiation with visible light. The photochromic material that develops into cyan fades to transparency by irradiation with red light. The photochromic material that develops into magenta fades to transparency by irradiation with green light. The photochromic material that develops into yellow fades to transparency by irradiation with blue light. However, in any of the photochromic materials, fading by visible light with a sunlight-level intensity is suppressed for a predetermined period. The photochromic material can absorb light with a wavelength shorter than the ultraviolet wavelength Anm, and when irradiated with light with a wavelength shorter than the ultraviolet wavelength Anm, it develops color.

[0042] The photochromic layer 61 has three types of photochromic materials that respectively develop colors in yellow, magenta, and cyan upon irradiation with UV light and visible light from the lighting device 2. The photochromic layer 61 is transparent before UV light irradiation. The photochromic layer 61 has three types of photochromic materials that respectively develop colors in cyan that absorbs red light, magenta that absorbs green light, and yellow that absorbs blue light upon irradiation with UV light.

[0043] The photochromic material fades to transparency upon irradiation with visible light. The photochromic material that develops a cyan color fades to transparency upon irradiation with red light. The photochromic material that develops a magenta color fades to transparency upon irradiation with green light. The photochromic material that develops a yellow color fades to transparency upon irradiation with blue light. However, fading due to visible light with a sunlight-level intensity can be suppressed for a predetermined period in any of the photochromic materials.

[0044] When the UV light containing light with a wavelength shorter than the ultraviolet wavelength Anm is irradiated, the coating layer 62 does not absorb the UV light. Therefore, the UV light reaches the photochromic layer 61. The photochromic layer 61 reacts to the UV light and changes to cyan, magenta, and yellow colors. Cyan, magenta, and yellow are mixed to achieve black or achromatic color. Although it is described as black or achromatic color, it is not necessarily a complete black or complete achromatic color.

[0045] The red, green, and blue visible light irradiated from the lighting device 2 is irradiated onto the color conversion layer 60 that has developed a black color based on a predetermined irradiation intensity, irradiation intensity ratio per color, and irradiation time. Specifically, by adjusting the irradiation intensity of red, green, and blue visible light, the irradiation intensity ratio per color, and the irradiation time, each color of cyan, magenta, and yellow can be faded. By varying the degree of fading of each color of cyan, magenta, and yellow, any color can be realized.

[0046] The coating layer 62 transmits visible light. Therefore, red, green, and blue light reach the photochromic layer 61. In order to output visible light of a narrow band for each color, as the visible light source, for example, an LED with a narrow half-value width of 5 to 10 nm is used.

[0047] For example, red light selectively fades the photochromic material that has developed a cyan color, and the degree of fading of magenta and yellow colors is smaller than the degree of fading of cyan color. Green light selectively fades the photochromic material that has developed a magenta color, and the degree of fading of cyan and yellow colors is smaller than the degree of fading of magenta color. Blue light selectively fades the photochromic material that has developed a yellow color, and the degree of fading of cyan and magenta colors is smaller than the degree of fading of yellow color.

[0048] In the example of the watch 4 shown here, the photochromic layer 61 is arranged on the windscreen 42. However, the photochromic layer 61 may be included inside the windscreen 42.

[0049] Hereinafter, the operating principle of the color conversion system will be described with reference to FIGS. 4 to 13. First, the light source and the characteristics (wavelength) of light will be described with reference to FIG. 4. FIG. 4 is a diagram showing the light source and the characteristics (wavelength) of light of the lighting device in FIG. 3. The UV light source 55 shown in FIG. 3 is a light source that irradiates ultraviolet light. For example, a high-pressure mercury lamp, a low-pressure mercury lamp, an ultraviolet LED, an ultraviolet laser, etc. are used. The UV light emitted by the UV light source 55 includes, for example, UV light 71 with a wavelength of 325 nm. When an ultraviolet LED is used as the UV light source 55, the ultraviolet LED emits UV light 71 (see FIG. 4) having a center wavelength of 325 nm ± 5 nm to ± 10 nm. This UV light 71 has a half-value width of ± 5 nm to ± 10 nm.

[0050] The visible light source shown in FIG. 3 includes an LED light source 56a that emits green light, an LED light source 56b that emits blue light, and an LED light source 56c that emits red light. The LED light source 56a emits, for example, blue visible light 74 (see FIG. 4) with a half-value width of 5 nm to 10 nm and a center wavelength of 430 nm ± 5 nm to ± 10 nm. The LED light source 56b emits, for example, green visible light 73 (see FIG. 4) with a half-value width of 5 nm to 10 nm and a center wavelength of 525 nm ± 5 nm to ± 10 nm. The LED light source 56c that emits red light emits, for example, visible light 72 (see FIG. 4) with a half-value width of 5 nm to 10 nm and a center wavelength of 650 nm ± 5 nm to ± 10 nm. The above wavelengths and half-value widths are not limited to these and can be appropriately designed and changed.

[0051] FIG. 5 is a diagram showing the absorption spectrum of the photochromic material before UV light irradiation and the spectrum of the UV light to be irradiated. FIG. 6 is a diagram showing the absorption spectrum of the photochromic material after UV light irradiation. FIG. 7 is a diagram showing how the irradiation intensities of the blue, green, and red light sources are adjusted for each color. FIG. 8 is a diagram showing the absorption spectrum absorbed by the coating layer after irradiating the color conversion layer with visible light by adjusting the irradiation intensity as shown in FIG. 7. Before UV light irradiation, for example, diarylethene is used as the photochromic material in the photochromic layer 61. As shown in FIG. 5, the photochromic material has an absorption spectrum 76 only in the UV light region and is transparent. On the other hand, the UV light irradiated from the UV light source 55 to the photochromic layer 61 is the spectrum 71 in FIG. 5.

[0052] When using, for example, three types of photochromic materials that develop colors in yellow, magenta, and cyan as the photochromic materials, the photochromic material that develops yellow has an absorption band in the blue wavelength range. The photochromic material that develops magenta has an absorption band in the green wavelength range. The photochromic material that develops cyan has an absorption band in the red wavelength range.

[0053] Therefore, when using three types of photochromic materials that develop colors in yellow, magenta, and cyan, the photochromic materials after UV light irradiation develop colors in yellow, magenta, and cyan and change to black as a whole as shown in FIG. 6. In the graph of FIG. 6, the absorption spectra of the three colors of yellow, magenta, and cyan are shown in a simplified manner, but materials that are more complex, have a narrower half-value width, or have a wider half-value width can also be selected.

[0054] When irradiating visible light for fading with, for example, an LED light source 56 in accordance with each absorption band of the photochromic material, as shown in FIG. 7, blue light with a central wavelength of, for example, 430 nm and a half-value width of 10 nm is irradiated from the blue LED. The blue light is absorbed by the photochromic material presenting yellow. For this reason, the photochromic material presenting yellow fades. The green light is absorbed by the photochromic material presenting magenta. And the photochromic material presenting magenta fades. The red light is absorbed by the photochromic material presenting cyan. And the photochromic material presenting cyan fades. By adjusting the irradiation intensity and irradiation time, as shown in FIG. 7, the fading degree of each color changes. In the example of FIG. 7, the intensity of the blue LED > the intensity of the red LED > the intensity of the green LED, and in this case, the fading of yellow > the fading of cyan > the fading of magenta.

[0055] After the color conversion layer 60 is irradiated with visible light at the irradiation intensity shown in FIG. 7, the absorption spectrum of the color conversion layer 60 becomes as shown in FIG. 8. As for the magnitudes of the color conversion layer 60 absorbing green, red, and blue colors respectively, it is green absorption > red absorption > blue absorption. From this, as the display color, blue is strong, followed by red, and green is the lowest. As a result of each of the three colors being absorbed, a blue-violet display is realized.

[0056] FIG. 9 is a diagram showing the absorption spectrum of a photochromic material presenting cyan after color development and fading, the absorption spectrum of the coating layer, and the spectrum of sunlight on the ground.

[0057] The absorption spectrum of the photochromic material presenting cyan after color development and fading becomes the absorption spectrum 78 shown in FIG. 9. Also, the absorption spectrum of the coating layer 62 becomes the absorption spectrum 75. The spectrum of sunlight on the ground surface is the spectrum 79.

[0058] The absorption spectrum of the photochromic material presenting cyan after color development and fading has an absorber in the ultraviolet region. This is because, by irradiation with visible light (red light), a part of the photochromic material presenting cyan returns to the state before UV light irradiation.

[0059] Sunlight on the ground surface has UV light and overlaps with the absorption band (from 325 nm to 430 nm) due to the structure of the photochromic material presenting cyan before UV light irradiation. That is, when exposed to the ultraviolet rays contained in sunlight, the photochromic material may color develop.

[0060] The coating layer 62 eliminates this possibility. The reason is that the coating layer 62 absorbs the light from 325 nm to 430 nm that may be adversely affected by the ultraviolet rays of sunlight. Due to the absorption in the coating layer 62, the ultraviolet rays of sunlight do not reach the photochromic layer 61, and the state of the photochromic layer 61 is maintained. As a result, the colored and faded photochromic layer 61 maintains its state, and the display color realized by coloring and fading is maintained.

[0061] Here, returning to FIG. 4, additional explanation will be given about the UV light for coloring. Since the UV light for coloring is irradiated onto the coating film formed on the coating layer 62, it is preferably not absorbed by the coating layer 62.

[0062] However, when simply shortening the wavelength of the UV light, since the energy value is high, for example, it has an adverse effect on the skin or the like. For this reason, it is preferably that the wavelength of the UV light for coloring is as long as possible. Further, the wavelength of the UV light for coloring is preferably provided close to or partially overlapping with the short wavelength side of the absorption band of the coating layer 62.

[0063] For example, in the example shown in FIG. 4, the coating layer 62 absorbs UV light from 325 nm to 430 nm, and the UV light for coloring has a wavelength of 325 nm, which is the same wavelength as the wavelength at the end of the absorption of the coating layer 62. Although a part of the UV light for coloring is absorbed by the coating layer 62, by giving sufficient intensity for coloring, the UV light for coloring can color the photochromic layer 61 without problems.

[0064] FIG. 10 is a diagram showing an example when, for example, diarylethene is used as the photochromic material of the photochromic layer that realizes cyan, magenta, and yellow. As the photochromic material of the photochromic layer that realizes cyan, magenta, and yellow, for example, the diarylethene shown in FIG. 10 may be used as the photochromic material of the photochromic layer that realizes cyan, magenta, and yellow.

[0065] FIG. 11 is a diagram showing a photochromic material that exhibits yellow. As the photochromic material exhibiting yellow, those shown in Fig. 11 can be used.

[0066] Fig. 12 is a diagram showing a photochromic material exhibiting magenta. As the photochromic material exhibiting magenta, those shown in Fig. 12 can be used.

[0067] Fig. 13 is a diagram showing a photochromic material exhibiting cyan. As the photochromic material exhibiting cyan, those shown in Fig. 13 can be used. Note that the examples of the photochromic materials shown here are just examples, and the photochromic materials are not limited to those described above. For diarylethene, the colors that develop by adding various functional groups can be appropriately designed. Also, the photochromic materials are not limited to diarylethene, and any known photochromic materials can be applied.

[0068] Here, with reference to Figs. 14 to 16, the operation of the color conversion system having the functional configuration of Fig. 3 will be described. Fig. 14 is a flowchart showing the operation of the color conversion system having the functional configuration of Fig. 3. Fig. 15 is a diagram showing an example of the color specification screen (UI) of the mobile terminal in Fig. 3. Fig. 16 is a diagram showing an example of the color setting screen (UI) of the mobile terminal in Fig. 3.

[0069] When causing the lighting device 2 storing the clock 4 to execute the color conversion operation, the user can display the color specification screen shown in Fig. 15 by performing a display operation on the color specification screen for the mobile terminal 1. The color specification screen, color setting screen, etc. displayed on the mobile terminal 1 are referred to as UI (User Interface).

[0070] As a method for causing the mobile terminal 1 to display a color specification screen, for example, an application program for color conversion processing (hereinafter referred to as "application") is installed in the mobile terminal 1 in advance, and the application for color conversion displayed on the top screen of the mobile terminal 1 is clicked. There is a first method of starting the application and displaying the color specification screen.

[0071] Alternatively, a second method may be used, in which the browser of the mobile terminal 1 accesses the website of the color conversion service provided by the service provider, and the color specification screen provided by the website is displayed.

[0072] In the color specification screen of FIG. 15, a color selection button area 151 is arranged. In the color selection button area 151, color selection buttons such as UV, red, yellow, purple, magenta, orange, blue, green, and gray are arranged. The user can select a desired color from the button group in the color selection button area 151 and click the button to specify the color of the windscreen 42 (see FIG. 1) of the clock 4.

[0073] In the color specification screen of FIG. 15, when there is no desired color or when creating a different color from the default color, by clicking the "Color Settings" button in the color specification screen of FIG. 15, the color settings screen shown in FIG. 16 is displayed.

[0074] In the color settings screen of FIG. 16, a customization area 161 is arranged. The customization area 161 is a customization instruction area that receives a designation operation in which the user customizes and generates an arbitrary color and designates the generated color as a predetermined color. Specifically, the customization area 161 is provided with an input window 162 for changing the parameter values of UV, R (red), G (green), and B (blue) respectively, an input window 163 for specifying the irradiation time, and the like. In addition, there is also an input field for specifying the ratio of the three colors. At the input window 162, parameter values for the irradiation intensity (voltage values applied to the respective light sources of red, green, and blue) can be set between 0 and 255. 0 is the minimum value and 255 is the maximum value.

[0075] As shown in FIG. 14, in step S101, when an operation of instructing a desired color (e.g., red) is performed on the user's mobile terminal 1 from among a predetermined N colors (e.g., 8 colors) on the color designation screen, the UI providing unit 31 accepts the color designation.

[0076] When the color is designated, the lighting device 2 is controlled by the mobile terminal 1 to start the lighting operation. In this case, in step S102, first, the color conversion layer 60 on the surface of the windshield glass 42 of the clock 4 is caused to develop color by irradiating UV light from the UV light source 55.

[0077] Specifically, when a color is designated on the color designation screen of the mobile terminal 1, the UI providing unit 31 accepts the color designation, and the color information is passed to the color conversion control unit 32. The color conversion control unit 32 reads out the corresponding light source control information from the storage unit 18 based on the color information, and transmits the light source control information to the lighting device 2. The light source control information includes UV light, parameter values of the irradiation intensity of each color of visible light, and the irradiation time. In addition, the light source control information also includes the irradiation ratio of each color as required.

[0078] In the lighting device 2, the communication unit 51 receives the light source control information transmitted from the mobile terminal 1 and passes it to the light source driving unit 52. The light source driving unit 52 drives the UV light source 55 based on the light source control information to irradiate the clock 4 with UV light. At this time, the UV light is irradiated for the irradiation intensity and irradiation time corresponding to the parameter values included in the light source control information.

[0079] Subsequently, in step S103, the light source drive unit 52 irradiates the visible light of red, green, and blue from the LED light sources 56a, 56b, and 56c of the lighting device 2 under the conditions (the irradiation intensity and irradiation time corresponding to the parameter values of the respective three LED light sources 56 included in the light source control information) necessary to convert the visible light of the red, green, and blue into a predetermined color, thereby fading the color conversion layer 60 of the windscreen glass 42 of the clock 4, and executes control to convert the color conversion layer 60 of the windscreen glass 42 of the clock 4 into the color specified by the user.

[0080] Here, a business model using the color conversion system of the first embodiment will be described. In the above embodiment, an example in which a three-layer color conversion layer 60 is formed on the surface of the windscreen glass 42 of the clock 4 has been described. However, alternatively, in the dial of the clock 4, the color may be changed by using a UV-reactive transparent dye. The clock 4 has a three-layer structure, where the first layer of the top layer is a glass layer with a UV cut function, the second layer is a dial layer containing a UV-reactive dye, and the third layer is the substrate layer of the clock 4.

[0081] Specifically, a clock 4 having a three-layer color conversion layer is provided. The top layer is the part of the windscreen glass of the clock 4 having a UV cut function, and a liquid agent that blocks specific UV light is kneaded or coated on the glass. The second layer is the dial, and a colorless and transparent UV-reactive dye is processed. The third layer of the bottom layer is the substrate of the clock, which serves to support the dial. The user selects a color via the app of the mobile terminal 1 and irradiates UV light with the lighting device 2 (a dedicated UV irradiation device) to change the colors of the dial and the second hand.

[0082] As a business model, a service is provided that changes the color of the dial of the watch 4 using a special UV-reactive transparent dye. In this case, the service provider sells colors to users through a mobile application. The user selects and purchases a color through the mobile application. The service provider temporarily changes the colors of the dial and the second hand using a color conversion system including a lighting device 2 (UV irradiation device) with the color purchased by the user. The color-changing state of the dial and the second hand is maintained for a period between 24 hours and one week and then returns to transparency.

[0083] In this service, the watch 4 is sold at least in one of online and retail stores, and a subscription model is also introduced. By regularly providing updates on new designs and colors, users can always enjoy new experiences. In particular, by selling limited models and collaboration models, diversification of revenue can be achieved. According to this service, a new experience can be provided to consumers who value fashion and individuality.

[0084] As a marketing strategy, for example, this service is penetrated into the market through partnerships with influencers and promotional activities at events. Also, by implementing user-participation design contests and limited campaigns, brand engagement can be strengthened.

[0085] As described above, according to this first embodiment, the user can freely change the colors of the watch crystal 42, the dial, the second hand, etc. of the watch. That is, the decorative modification of the watch 4 according to the user's taste becomes possible. Thereby, for example, it becomes possible to customize the watch according to a specific event or daily fashion. Also, the UV cut function can prevent deterioration of the internal parts of the watch and enable long-term use.

[0086] Also, according to this color conversion system, by processing a colorless and transparent UV-reactive dye on the clock face and the second hand, the color selected by the user temporarily changes under UV irradiation. The color conversion layer of the clock 4 has a three-layer structure. The uppermost glass part is equipped with a UV cut function, which can prevent the harmful effects of UV light. Also, the second layer contains a UV-reactive dye, and the color specified by the user through the app of the mobile terminal 1 is developed on the clock face and the second hand by the irradiation of UV light and LED light from the lighting device 2 (a dedicated UV irradiation device). The developed color is retained for 24 hours to one week and then returns to transparency, enabling use according to various situations.

[0087] As for the business targets, a product line and a target market are assumed. A product line corresponding to a wide range of categories such as fashion watches, business watches, and sports watches can be developed. The target market ranges from young people sensitive to fashion to business people.

[0088] As for the sales channels and price strategies, it is assumed that sales will be made through the company's online store and major online marketplaces. Store sales will be mainly carried out through select shops and watch specialty stores. Also, by setting a premium price and selling limited models, the profit can be maximized.

[0089] A subscription service that regularly provides new clock face designs and colors on a monthly fee basis can be considered. This service can provide special designs according to specific seasons or events and improve customer loyalty.

[0090] The services described above provide a new experience for users to customize the color of the clock face of the clock 4 and can offer various options according to fashion and lifestyle. This is expected to provide a new way to express the individuality of users and enhance competitiveness in the market.

[0091] Next, a second embodiment (nail example) of the color conversion system including the lighting device shown in FIG. 3 will be described with reference to FIGS. 17 to 19. First, the color conversion system including the lighting device of the second embodiment will be described with reference to FIG. 17. FIG. 17 is a diagram showing a second embodiment of the color conversion system including the lighting device shown in FIG. 3. The lighting device 2 of the second embodiment performs color conversion processing on nails that are applied to or attached to human fingernails. In the following embodiments, the color conversion layer applied to the medium uses the two-layer color conversion layer 60 shown in FIG. 3 or the type of the three-layer nail 401 shown in FIG. 18 depending on whether the object to be colored is transparent or not. Also, the portable terminal 1 is the same as that shown in FIGS. 1 to 3 above, and the description thereof will be omitted.

[0092] As shown in FIG. 17, in the lighting device 2 of the second embodiment, a handrest 172 is arranged on the side portion of the device body. Further, a plurality of pins 173 are arranged in a row in a serrated shape at a predetermined interval in an opening provided in the side portion of the device body where the handrest 172 is arranged. The plurality of pins 173 are for inserting a finger 181 into the gap between the respective pins 173, that is, for fixing the length (finger position) in the depth direction in which the finger 181 enters the case. Thereby, the position of the nail 182 is also fixed in a state where the respective fingers are separated.

[0093] In this lighting device 2, light sources (UV light source 55 and LED light source 56) are arranged inside the case above the positions of the respective nails 182. Since the position of the nail 182 is automatically fixed simply by a person inserting a finger into the gap between the pins 173 (without manually moving the hand for alignment), the light from the light source can be evenly irradiated onto each nail 182, and color can be imparted to the nail 401 arranged on the surface of the nail 182.

[0094] Here, the nail 401 will be described with reference to FIG. 18. FIG. 18 is a diagram schematically showing the laminated structure of a nail applied to a fingernail, which is a target (predetermined medium) for color conversion, of the lighting device shown in FIG. 17. FIG. 19 is a diagram showing the absorption spectrum of a UV absorber, the spectrum of lighting for coloring a photochromic layer, and the absorption spectrum of a polymerization initiator of a visible light-curable resin. As shown in FIG. 18, when the predetermined medium is a nail 401 applied to a fingernail 182 of a human finger 181, for example, as shown in FIG. 18, it has a three-layer structure laminated in the order of a base layer 63, a photochromic layer 61, and a coating layer 64 from the side closer to the fingernail 182. That is, in this second embodiment, the base layer 63 is disposed between the photochromic layer 61 and the fingernail 182, and the nail 401 itself functions as a color conversion layer.

[0095] The base layer 63 is made of, for example, an ultraviolet-curable resin as a main material and is a white coating film. The base layer 63 shields the color of the fingernail 182 (coating target) and suppresses the color mixing of the color of the photochromic layer 61 and the color of the surface of the fingernail 182. Since the fingernail 182 is substantially pink, by disposing the base layer 63 between the color (pink color) of the fingernail 182 and the photochromic layer 61, it is possible to suppress the color mixing of the pink color of the fingernail 182 with a wavelength into the color of the photochromic layer 61.

[0096] As the ultraviolet-curable resin, for example, an acrylic resin is used. The acrylic resin contains, for example, a polymerization initiator that absorbs UV light having at least one of the wavelengths of 365 nm and 405 nm. As the polymerization initiator, a commercially available polymerization initiator can generally be used.

[0097] The polymerization initiator is excited based on the absorbed light, causes intramolecular cleavage to generate radicals, and reacts with the double bonds of the acrylic resin to initiate polymerization. The base layer 63 also has the effect of improving the adhesion between the nail 401 and the fingernail 182.

[0098] The photochromic layer 61 is mainly composed of an ultraviolet-curable resin and contains a photochromic material. The curable resin is, for example, an acrylic resin, similar to the base layer 63. The acrylic resin has, for example, a polymerization initiator that absorbs UV light having at least one of the wavelengths of 365 nm and 405 nm.

[0099] As the polymerization initiator, a commercially available polymerization initiator can generally be used. As the photochromic material, for example, diarylethene shown in FIG. 10 is used.

[0100] The photochromic layer 61 is mainly composed of an ultraviolet-curable resin. The ultraviolet-curable resin has a solubility parameter that is, for example, within a difference of 20% or less, similar to the solubility parameter of the photochromic material, in the state before UV light irradiation.

[0101] Thereby, good compatibility is realized such that the ultraviolet-curable resin and the photochromic material do not separate from each other. The photochromic layer 61 is formed by applying an ultraviolet-curable resin containing a photochromic material onto the base layer 63 and irradiating it with UV light having a wavelength of 365 nm.

[0102] The coating layer 64 is a UV light absorption layer that absorbs UV light in a predetermined ultraviolet wavelength range. The predetermined wavelength range is, for example, as shown in FIG. 4, where the ultraviolet wavelength is from 325 nm to 430 nm.

[0103] The coating layer 64 has, for example, a pigment that absorbs UV light, an organic substance such as a stilbene derivative, etc. The coating layer 64 contains various ultraviolet absorbers. It is possible to appropriately select a material suitable as an ultraviolet absorber (contained in the coating layer 64) suitable for the medium from among various ultraviolet absorbers.

[0104] Since the photochromic material has an absorption spectrum 76 before UV light irradiation, as described in FIG. 4 for example, it develops color when irradiated with UV light that matches the absorption spectrum among the light that has passed through the coating layer 64.

[0105] A part of the UV light irradiated from the lighting device 2 (for example, ultraviolet rays having a wavelength from 325 nm to 430 nm) is absorbed by the coating layer 64. The light having a wavelength shorter than 325 nm passes through the coating layer 64 and is absorbed by the photochromic material of the underlying photochromic layer 61. Therefore, when the light having a wavelength shorter than 325 nm is irradiated, the photochromic layer 61 develops color. As the photochromic material, for example, diarylethene is used.

[0106] The coating layer 64 shown here contains a photocurable resin, a UV absorber, and a polymerization initiator. The photocurable resin used for the coating layer 64 is, for example, an acrylic resin. The UV absorber is, for example, a stilbene derivative.

[0107] The UV absorber absorbs light having a wavelength from 325 nm to 430 nm, for example, as shown by line 191 in the graph shown in FIG. 19. A UV absorber having such characteristics can be obtained by appropriately selecting a commercially available material from a film manufacturer or a chemical manufacturer as a specific ultraviolet wavelength absorber.

[0108] In addition to absorbing UV light having at least one of the wavelengths of 365 nm and 405 nm described above, the polymerization initiator contained in the coating layer 64 has an absorption edge in the visible light region (long wavelength side) having a wavelength of 430 nm or more, which is outside the light absorption region of the above UV absorber, as shown by line 192 in the graph shown in FIG. 19. For this reason, the photocurable resin cures with visible light and is one of the photocurable resins generally called visible light curable resins. Note that line 193 in the graph shown in FIG. 19 shows the spectrum of sunlight on the ground. Also, line 194 in the same figure shows the illumination spectrum for coloring the photochromic layer 61 and has an absorption edge on the shorter wavelength side of the wavelength band absorbed by the UV absorber (line 191 in FIG. 19).

[0109] The coating layer 64 is cured by irradiating a mixture of a photocurable resin, a UV absorber, and a polymerization initiator with light that causes cleavage of the polymerization initiator. The absorption edge of the polymerization initiator stays in the blue region, for example, at 450 nm, and the light absorption is also low compared to other wavelength regions.

[0110] Since the coating layer 64 has the function of absorbing ultraviolet rays, it is cured by light having a wavelength of, for example, 430 nm to 450 nm. For example, curing by LED light having a wavelength of 440 to 450 nm is preferable. In order to prevent inhibition of polymerization initiation by oxygen and assist curing, it is preferable to irradiate light and polymerize in a nitrogen atmosphere.

[0111] Here, it is also preferable to irradiate UV light having at least one of the wavelengths of 365 nm and 405 nm. Since the coating layer 64 has a UV absorber that absorbs the wavelength, it may seem contradictory.

[0112] However, it is effective for curing the surface of the coating layer 64 and the portion near the surface. In the vicinity of the surface of the coating layer 64, the polymerization initiator is irradiated with UV light having at least one of the wavelengths of 365 nm and 405 nm that is not completely absorbed by the UV absorber. Therefore, the polymerization initiator cleaves by UV light having at least one of the wavelengths of 365 nm and 405 nm.

[0113] And the efficiency of cleavage of the polymerization initiator by UV light having higher energy is higher than that by cleavage of the polymerization initiator by visible light. Therefore, for the portion near the surface of the coating layer 64, UV light having at least one of the wavelengths of 365 nm and 405 nm is effective.

[0114] At the surface of the coating layer 64, oxygen in the air inhibits cleavage, so polymerization hardly proceeds. By irradiating UV light having at least one of the wavelengths of 365 nm and 405 nm, curing of the surface of the coating layer 64 can be promoted.

[0115] The relationships of the optical properties of the above-described materials are summarized here. It is important for the UV absorber to absorb ultraviolet rays in sunlight. For example, it absorbs light from 325 nm to 430 nm. The photochromic material is colored by irradiation with light in a wavelength range shorter than the absorption wavelength band of the above-described UV absorber, for example, UV light with a wavelength of 325 nm.

[0116] On the other hand, as described above, the absorption edge of the polymerization initiator of the coating layer 64 includes light in a wavelength range longer than the absorption wavelength band of the above-described UV absorber, for example, wavelengths from 440 nm to 450 nm. That is, with respect to the absorption wavelength band of the UV absorber, the photochromic material has an absorption region on the shorter wavelength side, and the polymerization initiator of the coating layer has an absorption region on the longer wavelength side.

[0117] Thereby, the formation of the coating layer color conversion layer and the color change of the coating layer color conversion layer are realized. In the figure of FIG. 19, line 193 indicates the spectrum of sunlight on the ground surface, and line 194 indicates the spectrum of the illumination for coloring the photochromic layer 61.

[0118] Subsequently, with reference to FIG. 20, the process of nail formation and color conversion in the second embodiment will be described. FIG. 20 is a flowchart showing the process of nail formation and color conversion in the color conversion system of the second embodiment. <Nail formation process>

[0119] In this case, first, in step S201, an ultraviolet curable resin serving as the basis of the base layer 63 is applied to the surface of the nail 182.

[0120] Next, in step S202, the ultraviolet curable resin is cured by irradiating with UV light including at least one of the wavelengths of 365 nm and 405 nm to form the base layer 63.

[0121] Next, in step S203, as the photochromic layer 61, an ultraviolet curable resin added with a photochromic material is applied on the base layer 63 (ultraviolet curable resin).

[0122] Then, in step S204, by irradiating UV light including at least one of the wavelengths of 365 nm and 405 nm, the ultraviolet curable resin is cured to form the photochromic layer 61.

[0123] At this time, the photochromic material contained in the photochromic layer 61 reacts to the UV light and develops color. Although this color development is secondary, the amount of ultraviolet irradiation (such as the irradiation intensity and irradiation time of the UV light) is controlled so that the color development becomes sufficient color development.

[0124] Next, in step S205, for forming the coating layer, a visible light curable resin containing an ultraviolet absorber is applied. The UV absorber absorbs light, for example, from 325 nm to 430 nm. The visible light curable resin contains a polymerization initiator that cleaves with light in the long wavelength region that is not completely absorbed by the ultraviolet absorber, for example, light having a wavelength of 440 to 450 nm.

[0125] Next, in step S206, the visible light curable resin is cured by irradiating visible light on the longer wavelength side than the absorption wavelength of the UV absorber, for example, light from 440 to 450 nm, from an LED light source.

[0126] In step S206, light having at least one of the wavelengths of 365 nm and 405 nm may be irradiated. This is because the curing of the surface of the coating layer 64 can be promoted.

[0127] By the processes of steps S201 to S206 above, the nail 401 is formed. Note that in step 204, the photochromic layer 61 is colored. However, this coloring is secondary as described above and is colored in an arbitrary color (such as black) that has nothing to do with the intention.

[0128] <Discoloration process> In step S207, by irradiating visible light of red (R), green (G), and blue (B) in accordance with the absorption wavelength of the photochromic material whose molecular structure changes upon light irradiation, the photochromic material colored in step S204 is faded and reset.

[0129] Next, in step S208, the photochromic material is colored by irradiating UV light that colors the photochromic material and short-wavelength UV light that is not absorbed by the coating layer 64, for example, light having a wavelength of 325 nm.

[0130] Furthermore, in step S209, by selectively irradiating each visible light of red (R), green (G), and blue (B) with controlled intensity and time in accordance with the absorption wavelength of the colored photochromic material, a predetermined color is realized and the process ends.

[0131] As described above, according to this second embodiment, once the nail 401 is formed on the nail 182 of the human finger 181, it can be discolored to a desired color by the lighting device 2 next time. In particular, it becomes possible to change the color of the nail 401 according to clothes or the environment to go out (such as doing sports, being invited to a party, working at a company, etc.).

[0132] <Another example> The base layer 63 is for improving the adhesion of the entire nail 401 and at the same time serves as a base for avoiding color mixing between the color of the nail 182 and the photochromic layer 61. As shown in FIGS. 1 and 3, when the object to be colored needs to be transmitted to show the lower dial, such as the windshield glass 42 of the clock 4, the base layer 63 may not be formed.

[0133] In the above example, the nail 401 is formed by applying each layer to the nail 182 in order, but an integrated one of the photochromic layer 61 and the coating layer 64 may be used. In this case, a visible light curable resin is adopted as the main material, and the visible light curable resin contains an ultraviolet absorber and a photochromic material. In this case, after applying a visible light curable resin to the nail 182, visible light that is not completely absorbed by the ultraviolet absorber is irradiated. As a result, the visible light curable resin cures and the nail 401 is formed. However, in this case, the photochromic material will be located including the surface of the nail 401. In such a state, when exposed to sunlight, there is a possibility that UV light reaches the photochromic material without being absorbed by the ultraviolet absorbing material, so the photochromic material may be colored against the intention. Therefore, it is advisable to take measures (such as coating) to block UV light.

[0134] Next, with reference to FIG. 21, a third embodiment (example of a general-purpose machine) of the color conversion system including the lighting device shown in FIGS. 1 and 3 will be described. FIG. 21 is a diagram showing a third embodiment of the color conversion system including the lighting device shown in FIG. 3. As shown in FIG. 21, in the case of the color conversion system including the lighting device 2 of the third embodiment, the predetermined medium 402 may be any object as long as it is sized to fit into the space inside the lighting device 2. For example, it performs a coloring (color conversion) process on a pot, a cup, a container, a toy, etc. Note that the mobile terminal 1 is the same as that shown in FIGS. 1 to 3 above, and its description will be omitted.

[0135] The lighting device 2 of the third embodiment has a case composed of a left side surface, a right side surface, an upper surface, and a back surface. On each of the upper surface 211, the left side surface 212, and the right side surface 213, a light source unit including a UV light source 55 and an LED light source 56 is arranged. A heat sink 57 and a fan 58 are provided outside the light source unit. In addition, a handle 214 protruding in a direction perpendicular to each surface is fixed to the light source unit. Further, on each surface, a guide mechanism 215 is provided that engages with the handle 214 to enable the light source unit to slide and move. In the case of this lighting device 2, the user can move the light source unit up and down (in the direction of arrow Y) and left and right (in the direction of arrow X) with each handle 214 to adjust the irradiation distance between the light source and the predetermined medium 402.

[0136] In the case of the lighting device 2 of this third embodiment, functional elements other than the light source are arranged in an external control device (not shown). The functional elements are the communication unit 51, the light source driving unit 52, the power supply unit 53, etc. shown in FIG. 3. Therefore, the lighting device 2 and the control device are connected by a communication line and a power cord. Note that the control information from the mobile terminal 1 is transmitted to the lighting device 2 via the control device. The operation is the same as that of the first embodiment.

[0137] According to the color conversion system including the lighting device 2 of this third embodiment, it is possible to cope with a coloring target (predetermined medium 402) of a certain size, and it is possible to increase the output by heat dissipation measures such as the heat sink 57 and the fan 58. Coloring of objects larger than the clock 4, the nail 401, etc. is possible, and it can be used for general-purpose applications.

[0138] Next, a fourth embodiment (example where the coloring target is glasses) of the color conversion system including the lighting device shown in FIGS. 1 and 3 will be described with reference to FIG. 22. FIG. 22 is a diagram showing a fourth embodiment of the color conversion system including the lighting device shown in FIG. 1. As shown in FIG. 22, in the case of the lighting device 2 of the fourth embodiment, the predetermined medium is glasses 411, and as the color conversion layer formed on the glasses 411, the two-layer color conversion layer 60 shown in FIG. 3 is applied. The lighting device 2 is composed of a case 221 and a lid 222 that can be removed from the case 221. The inside of the case 221 is partitioned into a plurality of compartments by partition plates, and storage spaces 223 for each part 412 of the glasses 411 are provided. The UV light source 55 and the LED light source 56 shown in FIG. 3 are arranged on the lid 222. In addition to the entire glasses 411, the color designation screen of the mobile terminal 1 can also designate colors for each part 412. In addition, the functional configuration of the mobile terminal 1 is the same as that of the first embodiment (see FIG. 3), and the description thereof will be omitted.

[0139] According to the color conversion system including the lighting device 2 of the fourth embodiment, the glasses 411 alone, and of course, in the state where the parts are separated, can perform coloration (color conversion) in units of parts.

[0140] Next, with reference to FIG. 23, a fifth embodiment (an example where the object to be colored is jewelry) of the color conversion system including the lighting device shown in FIGS. 1 and 3 will be described. FIG. 23 is a diagram showing a fifth embodiment of the color conversion system including the lighting device shown in FIG. 1. As shown in FIG. 23, in the case of the fifth embodiment, the predetermined medium is jewelry 421, and the lighting device 2 is composed of a case 231 having an opening at the upper part and a lid 232 capable of opening and closing the opening of the case 231. The case 231 is provided with a seat portion 233 inside so as to support the ring portion of the jewelry 421. The UV light source 55 and the LED light source 56 shown in FIG. 3 are arranged on the lid 232. The functional configuration of the portable terminal 1 is the same as that of the first embodiment (see FIG. 3), and the description thereof will be omitted.

[0141] According to the color conversion system including the lighting device 2 of the fifth embodiment, coloration (color conversion) can be performed on the jewelry 421. In addition, by installing (introducing) the color conversion system in a store handling the jewelry 421, the customer frequency can be increased, and an increase in sales can also be expected for other products.

[0142] Next, with reference to FIG. 24, a sixth embodiment (an example where the object to be colored is a contact lens) of the color conversion system including the lighting device shown in FIGS. 1 and 3 will be described. FIG. 24 is a diagram showing a sixth embodiment of the color conversion system including the lighting device shown in FIG. 1. As shown in FIG. 24, in the case of the sixth embodiment, the predetermined medium is a contact lens 431, and the lighting device 2 is composed of a case 241 having an opening at the upper part and a lid 242 capable of opening and closing the opening of the case 241. The case 241 has an interior storage section 243 provided to hold the contact lens 431. The lid 242 has the UV light source 55 and the LED light source 56 shown in FIG. 3 arranged thereon. The functional configuration of the mobile terminal 1 is the same as that of the first embodiment (see FIG. 3), and the description thereof will be omitted.

[0143] The contact lens 431 is provided by forming a color conversion layer having a three-layer structure on the lens surface or inside the lens. The color conversion layer is composed of a first layer (lowermost layer), a second layer (intermediate layer), and a third layer (uppermost layer) in that order from the closest to the eyeball. The second layer (intermediate layer) has a UV-reactive transparent dye layer disposed therein. The third layer (uppermost layer) is a layer that cuts UV light, prevents color changes from UV light, and plays a role in protecting eye health.

[0144] In the case of this contact lens 431, the color specified by the user through the application of the mobile terminal 1 is developed by the contact lens 431 and returns to transparency after a certain period of time.

[0145] This contact lens 431 is a contact lens using a transparent dye that reacts to specific UV light. The user selects a color through the application of the mobile terminal 1, and the color is developed by the above-described dedicated lighting device 2 (UV irradiation device).

[0146] The color developed by the contact lens 431 is retained for 24 hours to one week and then returns to transparency, thereby reducing the hassle of disposable use. As a result, the user can enjoy a variety of color variations.

[0147] By providing the color conversion service including the above-described contact lens 431 and the lighting device 2, a new experience is provided to the user, and there are wide market possibilities in each field of fashion, medicine, and sports.

[0148] As a marketing strategy, this service will be penetrated into the market through partnerships with influencers and promotions at events. Also, at venues such as fashion shows and sports events, a trial experience of this service will be held to provide users with a special experience, thereby attracting users' interest.

[0149] According to the color conversion system including the lighting device 2 of the sixth embodiment, coloration (color conversion) can be performed on the contact lens 431 according to various situations. Specifically, the user can change the color of the contact lens according to daily fashion and events. Also, for medical use, while protecting the eye health by the UV cut function, a visual change can be provided. For sports use, visual adjustment according to a specific situation becomes possible, and an improvement in visibility and performance can be expected. Also, by installing (introducing) the color conversion system in a store handling the contact lens 431, the customer frequency can be increased, and an increase in sales can also be expected for other products.

[0150] Here, a business model using the color conversion system of the above sixth embodiment will be described. This business model provides a service of selling contact lenses using a special transparent pigment. The service provider sells colors to the user through a mobile application, the user selects and purchases a color through the mobile application, and the service provider changes the color of the contact lens by the color conversion system including the lighting device 2 (UV irradiation device) for the color purchased by the user and provides it to the user. The color of the contact lens is held for a period between 24 hours and one week and then returns to transparent. This service of changing the color of the contact lens can be applied to a wide range of uses such as fashion use, medical use, and sports use.

[0151] Next, with reference to FIG. 25, a seventh embodiment of the color conversion system including the lighting device shown in FIGS. 1 and 3 (an example where the object to be colored is a shoe) will be described. FIG. 25 is a diagram showing a seventh embodiment of the color conversion system including the lighting device shown in FIG. 1. As shown in FIG. 25, in the case of the seventh embodiment, the predetermined medium is a shoe 441, and the lighting device 2 is composed of a case 251 having an opening at the upper part and a lid 252 fitted to the opening of the case 251. The case 251 is provided with a deep storage part 253 inside so as to store the shoe 441. The UV light source 55 and the LED light source 56 shown in FIG. 3 are arranged on the case 251 and the lid 252. The functional configuration of the portable terminal 1 is the same as that of the first embodiment (see FIG. 3), and the description thereof will be omitted.

[0152] According to the color conversion system including the lighting device 2 of the seventh embodiment, coloring (color conversion) can be performed on the shoe 441. In addition, by installing (introducing) the color conversion system in a store that handles the shoe 441, the frequency of customers can be increased, and an increase in sales can also be expected for other products.

[0153] Next, with reference to FIG. 26, an eighth embodiment of the color conversion system including the lighting device shown in FIGS. 1 and 3 (an example where the object to be colored is a bag) will be described. FIG. 26 is a diagram showing an eighth embodiment of the color conversion system including the lighting device shown in FIG. 1. As shown in FIG. 26, in the case of the eighth embodiment, the predetermined medium is a bag 451, and the lighting device 2 is composed of a case 261 having an opening at the upper part and a lid 262 capable of opening and closing the opening of the case 261. The case 261 is provided with a deep storage part 263 inside so as to store the bag 451. The UV light source 55 and the LED light source 56 shown in FIG. 3 are arranged on the case 261 and the lid 262. The functional configuration of the portable terminal 1 is the same as that of the first embodiment (see FIG. 3), and the description thereof will be omitted.

[0154] According to the color conversion system including the lighting device 2 of the eighth embodiment, coloring (color conversion) can be performed on the bag 451. In addition, by installing (introducing) the color conversion system in a store that handles the bag 451, the frequency of customers can be increased, and an increase in sales can also be expected for other products.

[0155] Next, a ninth embodiment (an example where the object to be colored is a vehicle) of the color conversion system including the lighting device shown in FIGS. 1 and 3 will be described with reference to FIG. 27. FIG. 27 is a diagram showing a ninth embodiment of the color conversion system including the lighting device shown in FIG. 1. As shown in FIG. 27, in the case of the ninth embodiment, the predetermined medium is a color conversion layer (a three-layer structure similar to the example of the nail 401 in FIG. 18) formed on the exterior surface of the vehicle 461, and the lighting device 2 has a housing 271 provided with an inlet on the side surface. The interior of the housing 271 is a garage 272 for housing the vehicle 461. Inside the garage 272, the UV light source 55 and the LED light source 56 shown in FIG. 3 are arranged. The functional configuration of the portable terminal 1 is the same as that of the first embodiment (see FIG. 3), and the description thereof will be omitted.

[0156] According to the color conversion system including the lighting device 2 of the ninth embodiment, coloring (color conversion) can be performed on the vehicle 461. In addition, by installing (introducing) the color conversion system in a store that handles the vehicle 461, the frequency of customers can be increased, and an increase in sales can also be expected for other products.

[0157] Here, a business model using the color conversion system of the ninth embodiment will be described. The business model provides a service for changing the exterior color of a vehicle, and in particular enables customizing the exterior color of a vehicle at the time of and after vehicle purchase. As one of the business models, for example, an instant customization service for individuals can be considered. In this service, a person who wishes to make a purchase visits a dealer, selects a color from a color sample book, and then a test drive vehicle that can be changed to that color within a few minutes is provided. Before making a purchase, the person can have a specific color image and immediately experience that color.

[0158] As another business model, for example, a subscription service after vehicle purchase can be considered. In the case of this service, the user purchases a white vehicle coated with a transparent pigment and can change the color each time by visiting the dealer at the desired timing based on a subscription contract. With this service, the user can freely change the color of the vehicle according to their mood, season, or special event. As another business model, for example, a rapid response service for enterprises can be considered. In this service, an enterprise customer sets a custom color for a large number of vehicles for a specific event or campaign and a service that rapidly applies it to the large number of vehicles is provided.

[0159] According to the above-mentioned business models in this way, consumers can not only experience the color of a vehicle in real time during the purchase decision process, but also enjoy the flexibility to freely change the color even after purchase. Also, the dealer can enhance customer satisfaction, increase sales opportunities, and strengthen marketing activities.

[0160] As other business models, for example, it is conceivable to provide a service that converts off-line color information into optical information and sells colors through an application installed on a smartphone or a web application accessible on a web browser. With this service, a user who has purchased a color can connect a smartphone and a light irradiation device by short-range data communication, wireless local area network, etc. to send and receive signals, and can change the color of any product containing a pigment, such as a vehicle, clothes, bag, jewelry, eyeglass frame, lens, household appliance, nail, foundation, eyeliner, and hair color, according to their preference.

[0161] Moreover, since it can replace pigments, it is also possible to change the color of the paint on trains, airplanes, ships, etc. This can create a new platform market for purchasing digital colors.

[0162] It is possible to convert color information into optical information, incorporate the optical information as data on the blockchain, and develop the market for traceability such as who has acquired the optical information of that color and color exclusivity. The content of the optical information is defined by combinations such as the irradiation time, irradiation intensity (output), irradiation range, and ratio of each of R, G, and B.

[0163] <Business Model> As a business model, for example, by managing colors as digital data, there is no need to have the actual color as store inventory. The cost per color purchased through the application is only the usage fee for the application distribution platform (e.g., the application market on the Internet) and the settlement fee (e.g., X%), so the profit margin for the company increases.

[0164] Color transactions can be made in the form of selling at a certain price per color, and it is also possible to charge points and purchase with points. By adopting a point system, it becomes possible to exchange points with partner companies, expanding the scope for users. Prepare a function for users to transfer or present the colors they have purchased personally. To transfer a color, points are consumed. Therefore, associated profits are also generated.

[0165] <How to Sell Colors> · Have users buy colors using the device itself (UV irradiation device) and an app on their smartphones. Users have a digital palette and load colors into it. · Charge depending on the gauge (quantity, points). Users can create their own colors. · As the basic colors, for example, 24 colors are assumed, but colors within the range recognizable by humans can be additionally distributed. · Basically, users are asked to purchase colors through the app. · It has a function to synthesize (edit) colors as digital data. · The colors limited to that company are provided. Colors that can be purchased only there are set in cooperation with location information. · When new colors appear, they can be used digitally at any time. Users can download new colors at any time. · It is possible to buy one color at a time. It is also possible to buy all 24 colors together. It is also possible to select multiple colors and make a purchase. · Corporate exclusivity of color information is also made possible as a strategy (contract).

[0166] <Billing method> · It is possible to provide services through a subscription contract (monthly fixed amount) in a set with the device. · It may be made to cost (be billed) when changing colors. · In-app purchases + additional functions (such as gradients) are further sold as options. · It is also preferable to split the app's revenue (profit). Billing section, color setting section, color reception, color fee setting section (as a margin when developed as a collaboration with other companies rather than self-owned products). · Since the living environment varies for each user, if the color disappears within the warranty period, product warranty is provided within the warranty time. For example, in the case of nails 182 (see Figure 18), it is guaranteed for about 12 hours, and for hair, etc., it is guaranteed for about one week.

[0167] <Usage> · Usage includes painting of moving vehicles such as cars and airplanes, clothes, bags, jewelry, eyeglass frames, lenses, household appliances. All products containing dyes such as nails, foundation, eyeliner, hair color, etc. Products made with this technology can have their colors changed at any time. · As a tester function for product purchase, users can check colors by themselves and use it as a product to attract customers to visit the store to buy the actual product. · With the distribution of limited colors for enterprises, a digital palette is added with colors in the form of distributing a two-dimensional code and reading the two-dimensional code. · Each time the app is used, secondary information (gender, location, time, product, color, irradiation location) is acquired by the service provider's server or the like. Based on the acquired data, the server provides information to the app on the user's mobile terminal in the form of trends. The information is, for example, that such a person has purchased or used this color.

[0168] <Feature> · The color conversion system is characterized in that it replaces the information of the specified color with optical information (light source control information). It is defined by combinations such as the irradiation time, output, irradiation range, and ratio of each of R, G, and B. In this regard, it can be differentiated from an inkjet printer or the like. · The color conversion system can change the structure and irradiation conditions of the lighting device 2 (irradiation device) according to the guarantee time for giving color.

[0169] As described above, an embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within the scope that can achieve the object of the present invention are included in the present invention.

[0170] In the above-described embodiment, an example in the case where the predetermined medium is a clock has been described. However, in addition, for example, it may be a nail, glasses, jewelry, back, vehicle, etc. A housing corresponding to the size and shape of each medium may be prepared, and light may be irradiated from the surroundings with each medium housed in the housing.

[0171] Also, for example, the above-described series of processes can be executed by hardware or by software. In other words, the functional configuration in FIG. 3 is merely an example and is not particularly limited. That is, it suffices if the color conversion system is provided with a function capable of executing the above-described series of processes as a whole, and the use of any functional blocks for realizing this function is not particularly limited to the example of FIG. 3. Also, the location where the information of the functional blocks and the storage unit exists is not particularly limited to FIG. 3 and may be arbitrary. For example, at least a part of the information of the functional blocks and the storage unit required for executing various processes may be transferred to an illumination device, a cloud on a network, or the like. Conversely, the functional blocks and information of the illumination device may be transferred to a portable terminal, a cloud on a network, or the like. Also, one functional block may be configured by hardware alone, software alone, or a combination thereof.

[0172] When a series of processes are executed by software, the program constituting the software is installed in a computer or the like from a network or a recording medium. The computer may be a computer incorporated in dedicated hardware. Also, the computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose smartphone or personal computer in addition to a server.

[0173] A recording medium containing such a program is not only constituted by a removable medium (not shown) distributed separately from the apparatus main body for providing the program to a user or the like, but also constituted by a recording medium or the like provided to a user or the like in a state pre-incorporated in the apparatus main body.

[0174] Note that in this specification, the step of describing a program recorded in a recording medium includes not only processes performed in time series according to the order thereof, but also control processes that are not necessarily processed in time series and are executed in parallel or individually. Also, in this specification, the term "system" shall mean an overall apparatus composed of a plurality of devices, a plurality of means, or the like.

[0175] To summarize, the color conversion system to which the present invention is applied can have the following configuration and can take various embodiments. That is, the color conversion system to which the present invention is applied is (1) In a color conversion system that converts the color of a predetermined medium (for example, the windshield glass 42 of the clock 4 in FIGS. 1 and 3), the predetermined medium (for example, the windshield glass 42 of the clock 4 in FIG. 1) having a photochromic layer (for example, the photochromic layer 61 in FIG. 3), an illumination device (for example, the illumination device 2 in FIG. 3) that irradiates the predetermined medium (for example, the windshield glass 42 of the clock 4 in FIGS. 1 and 3) with ultraviolet rays (UV light) from an ultraviolet light source (for example, the UV light source 55 in FIG. 3) and visible light of blue, green, and red respectively from visible light sources of blue, green, and red (for example, the LED light sources 56a, 56b, 56c in FIG. 3), an information processing device (for example, the mobile terminal 1 in FIG. 3) that controls the irradiation of the visible light and the ultraviolet rays of the illumination device (for example, the illumination device 2 in FIG. 3), is provided, the photochromic layer (for example, the photochromic layer 61 in FIG. 4) has three types of photochromic materials that develop colors into yellow, magenta, and cyan respectively by irradiation with the ultraviolet rays from the illumination device (for example, the illumination device 2 in FIG. 3), the information processing device (for example, the mobile terminal 1 in FIG. 3) causes the predetermined medium to develop color by irradiating the ultraviolet rays from the ultraviolet light source (for example, the UV light source 55 in FIG. 3) of the illumination device (for example, the illumination device 2 in FIG. 3), and color conversion control means (for example, the color conversion control unit 32 in FIG. 3) that executes control to convert the predetermined medium (for example, the windshield glass 42 of the clock 4 in FIGS. 1 and 3) to the predetermined color (predetermined color) by irradiating the visible light of blue, green, and red respectively from the visible light sources of blue, green, and red (for example, the LED light sources 56a, 56b, 56c in FIG. 3) of the illumination device (for example, the illumination device 2 in FIG. 3) under the conditions (irradiation intensity and irradiation time of each of the three visible light sources) necessary to convert the visible light to a predetermined color, and fading the predetermined medium (for example, the windshield glass 42 of the clock 4 in FIGS. 1 and 3). It has Thereby, a predetermined medium (for example, the windshield glass 42 of the clock 4 in FIGS. 1 and 3) can be converted into the predetermined color (the color specified by the user).

[0176] (2) The predetermined medium (for example, the windshield glass 42 of the clock 4 in FIGS. 1 and 3) further has a coating layer (for example, the coating layer 62 in FIG. 3) that absorbs ultraviolet rays (325 nm to 430 nm) of wavelengths included in sunlight on the earth's surface and transmits ultraviolet rays of a predetermined wavelength (325 nm) or less. The ultraviolet rays irradiated from the lighting device (for example, the lighting device 2 in FIG. 3) are set to wavelengths (for example, blue: 430 nm, green: 525 nm, red: 650 nm) for causing the predetermined medium (for example, the windshield glass 42 of the clock 4 in FIG. 3) to develop color within the range of the predetermined wavelength or less that transmits through the coating layer (for example, the coating layer 62 in FIG. 3), and at least include components of the coloring wavelengths. In this way, by providing a coating layer (for example, the coating layer 62 in FIG. 3) that absorbs ultraviolet rays (325 nm to 430 nm) of wavelengths included in sunlight on the earth's surface and transmits ultraviolet rays of a predetermined wavelength (325 nm) or less, fading due to light from sunlight on the earth's surface can be prevented, so that the color after the conversion process can be maintained in a normal usage environment.

[0177] (3) The coating layer (for example, the coating layer 64 in FIG. 18) includes a photocurable resin, an ultraviolet absorber, and a polymerization initiator. The ultraviolet absorber absorbs ultraviolet rays in a light absorption region (range: 325 nm to 430 nm) that includes the wavelengths included in the sunlight on the earth's surface. The polymerization initiator absorbs ultraviolet rays of at least one of the wavelengths of 365 nm and 405 nm of the coloring wavelength, and has an absorption edge in a predetermined visible light region (wavelength range: a region of wavelengths of 430 nm or more) outside the light absorption region (range). Thereby, by irradiating visible light with wavelengths from 440 nm to 450 nm, cleavage of the polymerization initiator is caused, so that the curing of the photocurable resin can be assisted and the curing of the coating layer can be promoted.

[0178] (4) The photochromic layer (for example, the photochromic layer 61 in FIG. 3) contains an ultraviolet curable resin mixed with a photochromic material, The ultraviolet curable resin has a solubility parameter with a difference (for example, a difference within 20%) such that the ultraviolet curable resin and the photochromic material do not separate from each other in a state before being irradiated with the ultraviolet rays from the ultraviolet light source of the lighting device. Thereby, good compatibility in which the ultraviolet curable resin and the photochromic material do not separate from each other can be realized.

[0179] (5) The predetermined medium is any one of ornaments worn by a person (for example, a watch 4 worn on the wrist (see FIG. 1), a nail 401 disposed on the nail 182 of a person's finger 181 (see FIG. 18), glasses 411 worn on the face (ear) (see FIG. 22), jewelry 421 put on a finger (see FIG. 23), contact lenses 431 worn on a person's eyes (see FIG. 24), shoes 441 worn by a person (see FIG. 25), a bag 451 carried by a person (see FIG. 26), a vehicle 461 (see FIG. 27), etc.). In this way, by changing the color of the ornament worn by a person, it is possible to wear an ornament of a color according to the mood, outfit, and environment of the destination on that day, or to act (go out, etc.) with the ornament. In addition, a service for changing the color of the ornament can be provided.

[0180] (6) The color conversion method to which the present invention is applied is a color conversion system for converting the color of a predetermined medium (for example, the windshield glass 42 of the watch 4 in FIGS. 1 and 3), the predetermined medium (for example, the windshield glass 42 of the watch 4 in FIGS. 1 and 3) having a photochromic layer (for example, the photochromic layer 61 in FIG. 4), Ultraviolet light from an ultraviolet light source (e.g., the UV light source 55 in FIG. 3), and visible light of red, green, and blue from each of the red, green, and blue visible light sources (e.g., the LED light sources 56a to 56c in FIG. 3) are irradiated onto the predetermined medium by an illumination device (e.g., the illumination device 2 in FIG. 3). An information processing device (e.g., the mobile terminal 1 in FIG. 3) that controls the irradiation of the illumination device (e.g., the illumination device 2 in FIG. 3). A color conversion method executed by the information processing device (e.g., the mobile terminal 1 in FIG. 3) of the color conversion system including the above. When the photochromic layer (e.g., the photochromic layer 61 in FIG. 4) has three types of photochromic materials that respectively develop colors into cyan, magenta, and yellow by irradiation with the ultraviolet light from the illumination device (e.g., the illumination device 2 in FIG. 3). Steps executed by the information processing device (e.g., the mobile terminal 1 in FIG. 1). A color conversion control step of executing control to convert the predetermined medium (e.g., the windshield glass 42 of the clock 4 in FIGS. 1 and 3) to the predetermined color by causing the predetermined medium (e.g., the windshield glass 42 of the clock 4 in FIGS. 1 and 3) to develop color by irradiating the ultraviolet light from the ultraviolet light source (e.g., the UV light source 55 in FIG. 3) of the illumination device (e.g., the illumination device 2 in FIG. 3), and irradiating the visible light of red, green, and blue from each of the red, green, and blue visible light sources (e.g., the LED light sources 56a, 56b, 56c in FIG. 3) of the illumination device (e.g., the illumination device 2 in FIG. 3) under the conditions (the irradiation intensity and irradiation time of each of the three visible light sources) necessary to convert the visible light to a predetermined color, thereby causing the predetermined medium (e.g., the windshield glass 42 of the clock 4 in FIGS. 1 and 3) to fade. Including. It can be.

Explanation of Reference Numerals

[0181] 1... Mobile terminal, 2... Lighting device, 11... CPU, 12... ROM, 13... RAM, 14... Bus, 15... Input / output interface, 16... Output unit, 17... Input unit, 18... Storage unit, 19... Communication unit, 20... Drive, 21... Removable media, 31... UI providing unit, 32... Color conversion control unit, 55... UV light source, 56a, 56b, 56c... LED light sources

Claims

1. A color conversion system for converting the color of a predetermined medium, comprising: The predetermined medium having a photochromic layer; an illumination device that irradiates the predetermined medium with ultraviolet light from an ultraviolet light source and red, green, and blue visible light from red, green, and blue visible light sources, respectively; an information processing device that controls the illumination of the illumination device; Equipped with the photochromic layer includes three types of photochromic materials that develop colors of cyan, magenta, and yellow, respectively, when irradiated with ultraviolet light from the lighting device; The information processing device includes: a color conversion control means for executing control to convert the predetermined medium into the predetermined color by irradiating the predetermined medium with ultraviolet light from the ultraviolet light source of the lighting device to cause the predetermined medium to develop a color, and irradiating the predetermined medium with red, green, and blue visible light from the red, green, and blue visible light sources of the lighting device, respectively, under conditions required for converting the predetermined color into the predetermined color to cause the predetermined medium to fade; having the predetermined medium further has a coating layer that absorbs ultraviolet rays having wavelengths contained in sunlight on the earth's surface and transmits ultraviolet rays having wavelengths equal to or shorter than a predetermined wavelength; The ultraviolet light irradiated from the lighting device includes at least a component of a color-developing wavelength, the wavelength being set to cause the predetermined medium to develop a color within a range equal to or less than the predetermined wavelength that is transmitted through the coating layer. Color conversion system.

2. the coating layer includes a photocurable resin, an ultraviolet absorbing material, and a polymerization initiator; the ultraviolet absorbing material absorbs ultraviolet rays in a light absorption range including the wavelength contained in sunlight on the earth's surface, the polymerization initiator absorbs the ultraviolet light having the color-developing wavelength and has an absorption edge in a predetermined visible light region outside the light absorption region; The color transformation system of claim 1 .

3. the photochromic layer contains an ultraviolet curing resin in which the three types of photochromic materials are mixed, the ultraviolet curing resin has a solubility parameter difference such that the ultraviolet curing resin and the photochromic material are not separated from each other before the ultraviolet light is irradiated from the ultraviolet light source of the lighting device; The color transformation system of claim 1 .

4. The predetermined medium is a nail placed on a person's fingernail. The color transformation system of claim 1 .

5. The predetermined medium is disposed in at least a portion of the timepiece. The color transformation system of claim 1 .

6. A color conversion system for converting a color of a predetermined medium, comprising: The predetermined medium having a photochromic layer; an illumination device that irradiates the predetermined medium with ultraviolet light from an ultraviolet light source and red, green, and blue visible light from red, green, and blue visible light sources, respectively; an information processing device that controls the illumination of the illumination device; A color conversion method executed by the information processing device of the color conversion system, comprising: The photochromic layer contains three types of photochromic materials that develop colors of cyan, magenta, and yellow, respectively, when irradiated with ultraviolet light from the lighting device; The steps executed by the information processing device include: a color conversion control step of irradiating the predetermined medium with ultraviolet light from the ultraviolet light source of the lighting device to cause the predetermined medium to develop a color, and irradiating the predetermined medium with red, green, and blue visible light from the red, green, and blue visible light sources of the lighting device, respectively, under conditions required for converting the predetermined color, thereby fading the predetermined medium, thereby executing control to convert the predetermined medium into the predetermined color; Including, the predetermined medium further has a coating layer that absorbs ultraviolet rays having wavelengths contained in sunlight on the earth's surface and transmits ultraviolet rays having wavelengths equal to or shorter than a predetermined wavelength; The ultraviolet light irradiated from the lighting device includes at least a component of a color-developing wavelength, the wavelength being set to cause the predetermined medium to develop a color within a range equal to or less than the predetermined wavelength that is transmitted through the coating layer. Color conversion method.

Images