Light emission system and pseudo natural light emission member

Abstract

Provided is a light illumination system that, when a short-wavelength light curable resin is applied onto a body to be decorated such as an artificial nail or a nail of a fingertip, easily identifies a coating condition and a color of the short-wavelength light curable resin. This light emission system includes a short-wavelength light emission member and a pseudo natural light emission member, wherein the short-wavelength light emission member has a short-wavelength light emitting source in a casing, the casing has inside an opening that allows insertion of the nail therethrough, the short-wavelength light emitting source irradiates a short-wavelength light curable resin with short-wavelength light having a wavelength less than 410 nm to cure the resin, the pseudo natural light emission member has a planar light source, and the planar light source is located outside the casing and is capable of emitting diffusion light.

Claims

1. A light emission system for curing a short-wavelength light curable resin to constitute nail art onto an artificial nail or a nail on a fingertip, the system comprising: a short-wavelength light emission member; and a pseudo natural light emission member, wherein the short-wavelength light emission member includes a casing having a short-wavelength light emitting source therein, the casing having an opening that allows insertion of the artificial nail or the fingertip thereinto, wherein the short-wavelength light emitting source is configured to irradiate the short-wavelength light curable resin with a short-wavelength light to cure the resin when the artificial nail or the fingertip is inserted into the casing through the opening, the resin covering the artificial nail or the fingertip, the short-wavelength light having a wavelength less than 410 nm, and wherein the pseudo natural light emission member has a planar light source located outside the casing, the planar light source being configured to emit diffusion light.

2. The light emission system according to claim 1, wherein the casing has on its outer surface a placement portion that allows the artificial nail or the fingertip to be placed, and wherein the planar light source is configured to irradiate the artificial nail or the nail on the fingertip with diffusion light when the artificial nail or the fingertip is placed on the placement portion.

3. The light emission system according to claim 1, wherein the pseudo natural light emission member comprises at least two of the planar light sources including a first and a second planar light sources, and wherein the first planar light source is configured to irradiate the short-wavelength light curable resin with diffusion light from a direction different from an irradiation direction of the second planar light source.

4. The light emission system according to claim 1, wherein the planar light source has a general color rendering index Ra of 80 or more according to JIS Z 8726.

5. The light emission system according to claim 1, wherein the short-wavelength light curable resin is an ultraviolet light curable resin, and wherein diffusion light from the planar light source does not include light having a wavelength less than 350 nm, and equal to or more than 1000 nm.

6. The light emission system according to claim 1, wherein the short-wavelength light curable resin is an ultraviolet light curable resin, and wherein the short-wavelength light emitting source is configured to emit ultraviolet light having a wavelength less than 350 nm.

7. The light emission system according to claim 1, wherein the casing has thereon or thereabove a placement portion that allows the artificial nail or the fingertip to be placed, wherein the pseudo natural light emission member has a facing portion that faces the placement portion across a space, wherein the facing portion supports the planar light source, wherein the space allows insertion of the artificial nail or the fingertip, and wherein the planar light source is configured to irradiate the artificial nail or the fingertip with diffusion light when the artificial nail or the fingertip is inserted into the space.

8. The light emission system according to claim 7, wherein the pseudo natural light emission member comprises: at least two of the planar light sources including a first and a second planar light sources; the facing portion; and a leg that supports the facing portion, the facing portion supporting the first planar light source, the leg supporting the second planar light source, the first and the second planar light sources being configured to irradiate the artificial nail or the nail on the fingertip with diffusion light when the artificial nail or the fingertip is inserted into the space.

9. The light emission system according to claim 7, wherein the planar light source is detachable from and attachable to the facing portion.

10. A light emission system for curing a short-wavelength light curable resin to constitute a decorative object onto a target body, the system comprising: a short-wavelength light emission member; and a pseudo natural light emission member, wherein the short-wavelength light emission member includes a casing having a short-wavelength light emitting source therein, the casing having an opening that allows insertion of the target body thereinto, wherein the short-wavelength light emitting source is configured to irradiate the short-wavelength light curable resin with a short-wavelength light to cure the resin when the target body is inserted into the casing through the opening, the resin covering the target body, the short-wavelength light having a wavelength less than 410 nm, and wherein the pseudo natural light emission member has a planar light source located outside the casing, the planar light source being configured to emit diffusion light.

11. The light emission system according to claim 1, wherein the pseudo natural light emission member is configured to irradiate an animal skin or a human skin with light, the light having a synthetic spectrum obtained by synthesizing an identification spectrum and a pseudo natural light forming spectrum, wherein the identification spectrum has a maximum intensity MAX and a minimum intensity MIN in a blue-green to green wavelength range of 480 nm to 580 nm, wherein the identification spectrum has a fluctuation range of an irradiation intensity represented by the following (Expression 1) not more than 0.5, wherein the pseudo natural light forming spectrum has one peak in a blue wavelength range of 430 nm to 480 nm and another peak in a red wavelength range of 580 nm to 680 nm, and wherein a maximum peak intensity PEAK in the red wavelength range satisfies the following (Expression 2):
[Equation 1]
Fluctuation range=2(MAXMIN)/(MAX+MIN)(Expression 1); and
[Equation 2]
PEAK>MAX(Expression 2).

12. A light emission system comprising a pseudo natural light emission member including one or more planar light sources, the planar light source being configured to emit diffusion light, wherein the pseudo natural light emission member is configured to irradiate an animal skin or a human skin with light, the light having a synthetic spectrum obtained by synthesizing an identification spectrum and a pseudo natural light forming spectrum, wherein the identification spectrum has a maximum intensity MAX and a minimum intensity MIN in a blue-green to green wavelength range of 480 nm to 580 nm, wherein the identification spectrum has a fluctuation range of an irradiation intensity represented by the following (Expression 1) not more than 0.5, wherein the pseudo natural light forming spectrum has one peak in a blue wavelength range of 430 nm to 480 nm and another peak in a red wavelength range of 580 nm to 680 nm, and wherein a maximum peak intensity PEAK in the red wavelength range satisfies the following (Expression 2):
[Equation 3]
Fluctuation range=2(MAXMIN)/(MAX+MIN)(Expression 1); and
[Equation 4]
PEAK>MAX(Expression 2).

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a perspective view schematically showing a usage of a light emission system according to a first embodiment of the present invention.

(2) FIG. 2 is a perspective view schematically showing the light emission system shown in FIG. 1.

(3) FIG. 3 is an exploded perspective view of the light emission system shown FIG. 2.

(4) FIG. 4 is a cross-sectional view of the light emission system shown in FIG. 2, showing only main components.

(5) FIG. 5 is a perspective view of a pseudo natural light emission member shown in FIG. 3 as viewed from another direction.

(6) FIG. 6 is an exploded perspective view of the pseudo natural light emission member shown in FIG. 5.

(7) FIGS. 7A and 7B are an explanatory view of a usage example of the light emission system in the first embodiment of the present invention, wherein FIG. 7A is a cross-sectional view showing an coating step and FIG. 7B is a cross-sectional view showing a curing step.

(8) FIG. 8 is a perspective view of a light emission system according to another embodiment of the present invention.

(9) FIG. 9 is a front view of the light emission system according to further another embodiment of the present invention.

(10) FIG. 10 is an exploded perspective view of the light emission system according to further another embodiment of the present invention.

(11) FIG. 11A is a graph showing reflection spectra of palms of Finnish (Caucasian): , Nepalese (Asian): , and African (Black): x, wherein data items in K. S. Bersha et al., SPECTRAL IMAGING AND Data of ANALYSIS OF HUMAN SKIN (Univ. Eastern Finland June 2010, CIMET) are plotted, and FIG. 11B is a graph obtained by adding boundaries of wavelength regions to the graph in FIG. 11A.

(12) FIG. 12A shows relative reflectance spectra of oxygenated hemoglobin (solid line) and melanin (broken line), and FIG. 12B is a graph obtained by adding boundaries of wavelength regions to the graph in FIG. 12A.

(13) FIG. 13 is a graph showing rated light emission spectra of organic EL panels in Example 1, Reference Example 1, and Reference Example 2.

(14) FIG. 14 shows an ideal spectrum for improving a skin color recognition performance.

BEST MODE FOR CARRYING OUT THE INVENTION

(15) First, a light emission system which is one aspect of the present invention will be described in detail as follows.

(16) (Light Emission System)

(17) The light emission system is an illumination-light emission system having a high skin-color recognition performance, and is capable of irradiating an animal skin or a human skin with illumination light for achieving high recognition of the animal skin color or the human skin color under natural light. One of the features of the light emission system is that the system includes a specific pseudo natural light emission member.

(18) (Pseudo Natural Light Emission Member)

(19) Preferably, the pseudo natural light emission member includes one or more planar light sources capable of emitting diffusion light and is capable of emitting light having a synthetic spectrum obtained by synthesizing an identification spectrum and a pseudo natural light forming spectrum described later.

(20) It is more preferable that, in the pseudo natural light emission member, at least one planar light source among the planar light sources described above is an organic EL panel.

(21) It is still more preferable that the organic EL panel has a color rendering index CRI of 80 or more according to CIE 13.3, and that, in an emission spectrum of the organic EL panel, an intensity A (W/nm) at 480 nm is 0.8 times of or more than, and 1.2 times of or less than an intensity B (W/nm) at 580 nm.

(22) It is particularly preferable that the organic EL panel includes an organic EL element having a high skin-color recognition performance and a pseudo natural light forming function described later.

(23) The pseudo natural light emission member includes at least two planar light sources.

(24) One planar light source out of these two planar light sources is a pseudo natural light forming planar light source and preferably has a spectrum having a peak in a blue wavelength range and a peak in a red wavelength range. The other planar light source of these two planar light sources is a skin-color highly-recognizable planar light source and preferably has a spectrum having one peak which is a maximum intensity in a blue-green to green wavelength range. These planar light sources may be the above-described organic EL panel.

(25) (Identification Spectrum)

(26) The identification spectrum is for mainly improving skin color identification. It has a maximum intensity MAX (W/nm) and a minimum intensity MIN (W/nm) in a blue-green to green wavelength range (480 to 580 nm), wherein the fluctuation range of an irradiation intensity represented by the following (Expression 1) is 0.5 or less.
[Equation 3]
Fluctuation range=2(MAXMIN)/(MAX+MIN)(Expression 1)

(27) (Pseudo Natural Light Forming Spectrum)

(28) The pseudo natural light forming spectrum is for mainly forming pseudo natural light.

(29) The pseudo natural light forming spectrum has one peak each in a blue wavelength range (430 nm to 480 nm) and in a red wavelength range (580 nm to 680 nm), wherein an intensity of the peak in the red wavelength range is the maximum which is PEAK (W/nm) and satisfies the following (Expression 2).

(30) That is, the pseudo natural light forming spectrum has one peak in the blue wavelength range (430 nm to 480 nm) and one peak in the red wavelength range (580 nm to 680 nm), and the maximum peak intensity PEAK (W/nm) in the red wavelength range is higher than the maximum intensity MAX (W/nm) of the identification spectrum.
[Equation 4]
PEAK>MAX(Expression 2)

(31) (Organic EL Element)

(32) The organic EL element has a high skin-color recognition performance and a pseudo natural light forming function.

(33) The organic EL element has first to third light-emitting units between an anode electrode layer and a cathode electrode layer, and these units are electrically connected in series via a connection layer.

(34) Here, the connection layer injects electrons into a light-emitting unit in contact with an anode side and injects holes into a light-emitting unit in contact with a cathode side. That is, the connection layer has a function of injecting electrons into the light-emitting unit adjacent to the anode side and injecting holes into the light-emitting unit adjacent to the cathode side.

(35) The first light-emitting unit has an emission spectrum having a peak in the blue wavelength range (430 nm to 480 nm).

(36) It is preferable that the second light-emitting unit has an emission spectrum having one peak which is the maximum intensity in the wavelength range of 460 nm to 530 nm, and an emission spectrum having one peak which is the maximum intensity in the blue-green wavelength range (480 nm to 530 nm).

(37) The third light-emitting unit has an emission spectrum having a peak in the red wavelength range (580 nm to 680 nm) and one peak which is the maximum intensity in the green wavelength range (530 nm to 580 nm).

(38) Now, a light illumination system including, as necessary, the abovementioned pseudo natural light emission member as a pseudo natural light emission member 3 shown in the following embodiment will be described.

(39) In summary, the system is for curing a short-wavelength light curable resin to form a nail art onto an artificial nail or a nail of a fingertip, the system including a short-wavelength light emission member 2 and the pseudo natural light emission member 3, wherein the short-wavelength light emission member 2 has a short-wavelength light emitting source 11 in a casing 10, the casing 10 has inside an opening 15 which allows insertion of the artificial nail or the fingertip, the short-wavelength light emitting source 11 irradiates a short-wavelength light curable resin with short-wavelength light having a wavelength less than 410 nm to cure the short-wavelength light curable resin when the artificial nail or the fingertip is inserted into the casing 10 through the opening 15, wherein the pseudo natural light emission member 3 has a planar light-emitting member 50, and wherein the planar light-emitting member 50 is located outside the casing 10 and is capable of emitting diffusion light. The detail of the light emission system is as stated below.

(40) Hereinafter, embodiments of the present invention will be described in detail. In the following description, unless otherwise specified, the position shown in FIG. 2 is used as a reference. That is, a service receiver 100 side is defined as a front side and a practitioner 101 side is defined as a rear side.

(41) A light emission system 1 according to a first embodiment of the present invention is mainly used in a nail salon, for example. As shown in FIG. 1, the light emission system 1 is used when a practitioner 101 such as a manicurist coats an artificial nail or a nail of a service receiver 100 of nail care with a short-wavelength light curable resin to provide a nail art, such as gel nail, sculpture, nail polish, or gel polish.

(42) An example where a nail art is provided by coating the nail of the service receiver 100 with a short-wavelength light curable resin will be described below.

(43) As can be seen from FIGS. 2 and 3, the light emission system 1 includes a short-wavelength light emission member 2 and a pseudo natural light emission member 3, wherein the pseudo natural light emission member 3 is attached to the short-wavelength light emission member 2.

(44) The short-wavelength light emission member 2 irradiates a short-wavelength light curable resin with short-wavelength light for curing the short-wavelength light curable resin. As shown in FIG. 4, the short-wavelength light emission member 2 includes, as main components, a short-wavelength light emitting source 11 (hereinafter also simply referred to as a short-wavelength light source 11) and a drying unit 12 inside a casing 10.

(45) The casing 10 is a box-shaped body having an opening 15 into which at least the fingertip of the service receiver 100 can be inserted. As can be seen from FIGS. 3 and 4, the casing 10 has a curing space 16 thereinside, and this curing space 16 is enclosed by a bottom face forming part 21, a top face forming part 22, and lateral face forming parts 23, 24, and 25.

(46) The curing space 16 is used for curing the short-wavelength light curable resin. As shown in FIG. 4, the curing space 16 communicates with an outside via the opening 15, and is an insertion space which can receive the fingertip of the service receiver 100 through the opening 15.

(47) The bottom face forming part 21 is a wall portion constituting the bottom face of the casing 10, and has an inner placement portion 30 on its inner surface.

(48) The inner placement portion 30 is located inside the casing 10 such that the fingertip of the service receiver 100 can be placed thereon. The inner placement portion 30 is provided with a hand-shaped recessed section 31, and the fingertips of the service receiver can be fixed into the recessed section 31. That is, the fingertips of the service receiver 100 can be fitted in the recessed section 31.

(49) As can be seen from FIGS. 3 and 4, the top face forming part 22 is a wall portion constituting the top face of the casing 10 and facing the bottom face forming part 21 across the curing space 16 in the vertical direction. The top face forming part 22 has an outer placement portion 35 on its outer surface.

(50) The outer placement portion 35 is a portion on which the fingertip of the service receiver 100 can be placed, and also functions as a work table for the practitioner 101. The outer placement portion 35 is provided with a hand-shaped recessed section 36, and the fingertips of the service receiver 100 can be fixed into the recessed section 36. That is, the fingertips of the service receiver 100 can be fitted in the recessed section 36.

(51) The lateral face forming parts 23, 24, and 25 are wall portions connecting the bottom face forming part 21 and the top face forming part 22.

(52) The casing 10 is provided with the opening 15 on the front as viewed from the service receiver 100.

(53) The opening 15 is a communication opening which allows communication between the curing space 16 inside the casing 10 and the outside, and is defined by front end faces of the forming parts 21, 22, 23, and 25. The opening 15 allows insertion of the fingertip of the service receiver 100 therethrough.

(54) The short-wavelength light source 11 can emit short-wavelength light toward the inner placement portion 30 as irradiation light. The short-wavelength light source 11 can emit the irradiation light several times per second from a flash lamp being used as a light source.

(55) The irradiation light emitted from the short-wavelength light source 11 is short-wavelength light which can cure the short-wavelength light curable resin. The irradiation light emitted from the short-wavelength light source 11 is preferably short-wavelength light having a wavelength less than 410 nm, more preferably ultraviolet light having a wavelength less than 350 nm.

(56) The irradiation light emitted from the short-wavelength light source 11 in the present embodiment is ultraviolet light having a wavelength less than 350 nm.

(57) It is preferable that the short-wavelength light source 11 emits irradiation light two times or more and a hundred times or less per second. Within this range, the short-wavelength light source 11 can emit irradiation light without applying an excessive load to the flash lamp serving as the light source.

(58) The short-wavelength light source 11 is preferably capable of emitting irradiation light having a total irradiation energy of 0.1 J/cm.sup.2 or more and 5.0 J/cm.sup.2 or less. If the energy is within this range, a time for curing the short-wavelength light curable resin can be shortened while preventing low temperature burns, when the fingertip of the service receiver 100 is placed on the inner placement portion 30.

(59) The drying unit 12 dries the inside of the curing space 16 and volatilizes a solvent component in the short-wavelength light curable resin.

(60) The pseudo natural light emission member 3 reproduces and emits pseudo natural light, and includes planar light-emitting members 50 (50a to 50d) (planar light sources), a fixing member 51, and a control device 52 as main components, as can be seen from FIGS. 5 and 6.

(61) The planar light-emitting members 50 are planar light-emitting light sources that widely emit light and emit diffusion light, and they are circular or polygonal plate members. The planar light-emitting members 50 in the present embodiment are rectangular organic EL panels.

(62) The diffusion light emitted from the planar light-emitting members 50 is preferably white light having a general color rendering index Ra of 80 or more according to JIS Z 8726.

(63) The planar light-emitting members 50 are capable of emitting diffusion light not including an emission spectrum in a wavelength range of less than 350 nm and 1000 nm or more. That is, the irradiation light from the planar light-emitting members 50 has only the emission spectrum in the wavelength range of 350 nm or more and less than 1000 nm. The planar light-emitting members 50 have magnetic force generating units so as to be attachable/detachable to/from fixing parts 57a, 57b, 58, and 59 of the fixing member 51.

(64) The fixing member 51 has substantially an angular C-shape as viewed from front, and includes a main body 53 (facing portion) and legs 55 and 56 as shown in FIG. 5.

(65) The main body 53 is a plate-shaped portion extending in the lateral direction, and has, on its lower surface, fixing parts 57a and 57b to which the planar light-emitting members 50a and 50b can be fixed. The fixing parts 57a and 57b are plate members made of a magnetic material and are capable of supporting the planar light-emitting members 50a and 50b by magnetic force between the planar light-emitting members 50a and 50b and the fixing parts 57a and 57b.

(66) The length of the main body 53 in the front-rear direction is preferably 5 cm or more and 15 cm or less. If the length is within this range, the fingertip of the service receiver 100 or the like is less likely to be hidden by the main body 53 during the treatment, and the main body 53 is less likely to interfere.

(67) The leg 55 is an elongated plate-shaped portion extending downward in the vertical direction from one of lengthwise ends of the main body 53. The leg 55 has, on its inner surface, the fixing part 58 on which the planar light-emitting member 50c can be fixed.

(68) The leg 56 is an elongated plate-shaped portion extending in the same direction as the extending direction of the leg 55 from the other lengthwise end of the main body 53. The leg 56 has, on its inner surface, the fixing part 59 on which the planar light-emitting member 50d can be fixed at a position facing the fixing part 58 of the leg 55.

(69) The fixing parts 58 and 59 are both plate members made of a magnetic material and are capable of supporting the planar light-emitting members 50c and 50d by magnetic force between the planar light-emitting members 50c and 50d and the fixing parts 58 and 59.

(70) The control device 52 turns on or off the planar light-emitting members 50a to 50d, and also serves as a power supply device that supplies electric power to the planar light-emitting members 50a to 50d.

(71) The short-wavelength light curable resin is a curable resin in the form of a gel, and has fluidity before being applied. The short-wavelength light curable resin is a curable resin that cures by irradiation light from the short-wavelength light source 11 but does not substantially cure by irradiation light from the planar light-emitting members 50a to 50d.

(72) The wording not substantially cure by the irradiation light referred to herein indicates that 98% or more of all components do not cure when being irradiated with irradiation light from the planar light-emitting members 50a to 50d.

(73) The short-wavelength light curable resin is an ultraviolet curable resin that cures by ultraviolet light, and in the present embodiment, it cures by being irradiated with light containing light having a wavelength less than 350 nm.

(74) Subsequently, the positional relationship of the components of the light emission system 1 in the present embodiment will be described.

(75) The pseudo natural light emission member 3 covers the outside of the short-wavelength light emission member 2 as shown in FIG. 2. The main body 53 of the pseudo natural light emission member 3 is located above the outer placement portion 35 of the short-wavelength light emission member 2 so as to face the outer placement portion 35. A coating space 61 is formed between the main body 53 and the outer placement portion 35. The practitioner 101 can apply the short-wavelength light curable resin to the nail of the service receiver 100 in the coating space 61.

(76) The short-wavelength light emission member 2 is positioned between the legs 55 and 56 of the pseudo natural light emission member 3, and the legs 55 and 56 face the lateral face forming parts 23 and 25. A part of the short-wavelength light emission member 2 projects forward (toward the service receiver 100) from the inside of the pseudo natural light emission member 3.

(77) The two planar light-emitting members 50a and 50b are fixed to the fixing parts 57a and 57b in such a way that emission surfaces 60a and 60b face downward in the vertical direction. That is, the planar light-emitting members 50a and 50b are directed to the coating space 61 so as to be capable of irradiating the outer placement portion 35 with diffusion light. The planar light-emitting members 50c and 50d are fixed to the fixing parts 58 and 59 of the legs 55 and 56 such that emission surfaces 60c and 60d thereof are directed to the coating space 61. That is, the planar light-emitting members 50c and 50d face each other so as to be capable of irradiating the outer placement portion 35 with diffusion light.

(78) The direction of the emission surfaces 60c and 60d of the planar light-emitting members 50c and 50d is different from the direction of the emission surfaces 60a and 60b of the planar light-emitting members 50a and 50b. That is, the direction orthogonal to the emission surfaces 60c and 60d of the planar light-emitting members 50c and 50d is not parallel to but intersects or is twisted relative to the direction orthogonal to the emission surfaces 60a and 60b of the planar light-emitting members 50a and 50b. The control device 52 is mounted to the leg 56 which is one of the legs. The control device 52 is capable of controlling the planar light-emitting members 50a to 50d such that they emit light, through wiring lines, not shown, inside the fixing member 51.

(79) Subsequently, a usage example of the light emission system 1 according to the present embodiment will be described. An example where a nail art is provided to the nail of the service receiver 100 will be described below.

(80) First, the practitioner 101 is seated so as to face the service receiver 100 across the light emission system 1, and turns on the power source of the control device 52 to light the planar light-emitting members 50a to 50d.

(81) At this time, the planar light-emitting members 50a and 50b emit diffusion light toward the outer placement portion 35, and the planar light-emitting members 50c and 50d emit diffusion light toward the outer placement portion 35 in a direction intersecting the emission direction of the planar light-emitting members 50a and 50b.

(82) Thereafter, the practitioner 101 performs an coating step and a curing step to provide a desired nail art to the nail of the service receiver 100.

(83) First, as shown in FIG. 7A, the practitioner 101 asks the service receiver 100 to place his/her fingertip into the recessed section 36, applies light from the pseudo natural light emission member 3, and selects an appropriate short-wavelength light curable resin for the skin color of the service receiver 100. Then, the practitioner 101 coats a desired area of the nail of the service receiver 100 (coating step) with the selected short-wavelength light curable resin in the form of a gel.

(84) At this time, the planar light-emitting members 50a and 50b are located on a projection plane in the vertical direction of the fingertips of the service receiver 100 and the hand of the practitioner 101, and the planar light-emitting members 50c and 50d are located on a projection plane in a horizontal direction of the fingertips of the service receiver 100 and the hand of the practitioner 101. That is, the fingertips of the service receiver 100 and the hand of the practitioner 101 are irradiated with light from different directions from planar light-emitting members 50a to 50d. In the present embodiment, the fingertips of the service receiver 100 and the hand of the practitioner 101 are irradiated with diffusion light from three directions, and shadows hardly appear near the fingertips of the service receiver 100 and the hand of the practitioner 101. Further, the fingertips of the service receiver 100 and the hands of the practitioner 101 are illuminated with diffusion light having high color rendering properties from the planar light-emitting members 50a to 50d, so that they are illuminated with soft light like sunlight. Therefore, the practitioner 101 can see the substantially actual color of the short-wavelength light curable resin on the nail of the fingertip of the service receiver 100.

(85) After coating the desired area of the nail of the service receiver 100 with the desired short-wavelength light curable resin, the practitioner 101 asks the service receiver 100 to insert his/her fingertips into the casing 10 through the opening 15 of the short-wavelength light emission member 2 and place his/her fingertips into the recessed section 31 of the inner placement portion 30, as shown in FIG. 7B. Then, the practitioner 101 drives the short-wavelength light emission member 2 to irradiate the short-wavelength light curable resin covering the nail of the service receiver 100 on the inner placement portion 30 with short-wavelength light and dries the short-wavelength light curable resin. Thus, the short-wavelength light curable resin is hardened, and nail coating is formed (curing step).

(86) Then, when the nail coating is provided and the curing step is finished, the coating step is carried out again as necessary. Specifically, the practitioner 101 places the fingertips of the service receiver 100 in the recessed section 36, selects a short-wavelength light curable resin according to the skin color of the service receiver 100 or the color of the nail covering the nail, and coats a desired area of the nail or nail coating of the service receiver 100 with the selected short-wavelength light curable resin.

(87) The coating step and the curing step described above are alternately repeated to provide nail coating of the nail of the service receiver 100, and thus, a desired nail art is provided.

(88) According to the light emission system 1 in the first embodiment, an organic EL panel having high color rendering properties are used for the planar light-emitting members 50a to 50d. Therefore, the practitioner 101 can easily identify the actual skin color of the service receiver 100 under natural light, and hence can select the color of the short-wavelength light curable resin according to the skin color of the service receiver 100 with little hesitation. That is, the light emission system 1 can provide a high actual color decorativeness.

(89) According to the light emission system 1 in the first embodiment, the diffusion light emitted from the planar light-emitting members 50a to 50d does not include a wavelength spectrum in the wavelength range of less than 350 nm and 1000 nm or more, so that the short-wavelength light curable resin is hard to cure during the coating step. That is, the light emission system 1 according to the first embodiment can provide a high performance for preventing curing during decoration. The light emission system 1 can also reduce eye fatigue of the practitioner 101 or the service receiver 100 caused by the short-wavelength light, and can prevent heating due to long-wavelength light, as compared to the conventional cases. Therefore, the practitioner 101 can comfortably provide the treatment, and the service receiver 100 can comfortably receive the treatment. In other words, the light emission system 1 in the first embodiment can exhibit high comfortable decorativeness.

(90) According to the light emission system 1 in the first embodiment, the hands of the practitioner 101 and the fingertips of the service receiver 100 are illuminated by the plurality of planar light-emitting members 50a to 50d during the coating step, so that shadows are less likely to appear near the hand of the practitioner 101 and the fingertip of the service receiver 100. Thus, the practitioner 101 can easily perform the treatment.

(91) According to the light emission system 1 in the first embodiment, the curing space 16 and the coating space 61 are different spaces and close to each other, whereby the service receiver 100 can insert fingertips of one hand into the coating space 61 while inserting the fingertips of the other hand into the curing space 16. Therefore, while the short-wavelength light curable resin is applied onto the nail of the finger on the right hand of the service receiver 100, the short-wavelength light curable resin applied to the nail of the finger on the left hand can be cured. Thus, according to the light emission system 1, the treatment time can be shortened.

(92) According to the light emission system 1 in the first embodiment, when a short-wavelength light curable resin is applied onto the body to be decorated such as the artificial nail or the nail of the fingertip, the coating condition and color of the short-wavelength light curable resin can be easily identified.

(93) According to the pseudo natural light emission member in the first embodiment, under white light close to the natural light, an animal skin color or a human skin color can be reproduced.

(94) In the embodiment described above, the main body 53 is connected to the legs 55 and 56 so as to be supported in a non-rotatable manner. However, the present invention is not limited thereto. As shown in FIG. 8, the main body 53 may be supported to the legs 55 and 56 in a rotatable manner.

(95) In the above embodiment, the emission surfaces 60a and 60b of the planar light-emitting members 50a and 50b are oriented in the vertical direction. However, the present invention is not limited thereto. The emission surfaces 60a and 60b of the planar light-emitting members 50a and 50b may be inclined in a direction intersecting the vertical direction. In this case, it is preferable that the emission surfaces 60a and 60b of the planar light-emitting members 50a and 50b are inclined toward the practitioner 101.

(96) In the above embodiment, the fixing member 51 has an angular C shape when viewed from front. However, the present invention is not limited thereto. The fixing member 51 may have an arc shape. That is, the main body 53 and the legs 55 and 56 may form a continuous arc as shown in FIG. 9.

(97) In this case, it is preferable that the planar light-emitting member 50 is a flexible organic EL panel having a flexible substrate as a supporting substrate.

(98) In the above embodiment, the recessed section 36 is formed in the outer placement portion 35. However, the present invention is not limited thereto. The outer placement portion 35 may not be formed with the recessed section 36. Similarly, the present invention is not limited to the configuration where the recessed section 31 is formed in the inner placement portion 30. The inner placement portion 30 may not be formed with the recessed section 31.

(99) In the above embodiment, a part of the top face forming part 22 of the casing 10 functions as the outer placement portion 35 on which the fingertip of the service receiver 100 is placed. However, the present invention is not limited thereto. The outer placement portion 35 and the casing 10 may be separately provided. For example, a placement member 70 that is separate from the casing 10 and has the outer placement portion 35 may be prepared, and the placement member 70 may be placed on the casing 10, as shown in FIG. 10.

(100) In the above embodiment, the two planar light-emitting members 50a and 50b are provided to the main body 53. However, the present invention is not limited thereto. A single planar light-emitting member 50 may be provided to the main body 53 or three or more planar light-emitting members 50 may be provided.

(101) Similarly, while a single planar light-emitting member 50 is provided to each of the legs 55 and 56 in the above-described embodiment, the present invention is not limited thereto. Three or more planar light-emitting members 50 may be provided to each of the legs 55 and 56.

(102) In the above embodiment, a plurality of planar light-emitting members 50 are aligned in the longitudinal direction of the main body 53. However, the present invention is not limited thereto. The planar light-emitting members 50 may be aligned in multiple rows in the longitudinal direction of the main body 53.

(103) In the above embodiment, a nail art is provided with the nail of the service receiver 100 being inserted into the curing space 16 or the coating space 61. However, the present invention is not limited thereto. A nail art may be provided with only an artificial nail such as sculpture being inserted into the curing space 16 or the coating space 61.

(104) In the above embodiment, the short-wavelength light emission member 2 and the pseudo natural light emission member 3 are integrally attached. However, the present invention is not limited thereto, and the short-wavelength light emission member 2 and the pseudo natural light emission member 3 may be attached in a detachable manner.

(105) In the above embodiment, the outer placement portion 35 is formed on the top face of the top face forming part 22 which is the outer face of the casing 10. However, the present invention is not limited thereto. The outer placement portion 35 may be formed on the lateral face forming parts 23 and 25.

(106) In the above embodiment, the short-wavelength light curable resin is cured to form a nail art as a decorative object on the nail which is the body to be decorated (target body). However, the present invention is not limited thereto. The body to be decorated may be other than the nail, and the decorative object may be other than the nail art.

(107) The body to be decorated may be, for example, an accessory such as a necklace or a ring. The decorative object may be beads, for example.

(108) In the above embodiment, the pseudo natural light emission member is used for identifying the color of the nail art. However, the present invention is not limited thereto. The pseudo natural light emission member can be used not only for identifying the color of the nail art but also for recognizing an animal skin color or a human skin color in medical institutions.

(109) The components in the above embodiments can be freely replaced or added among the respective embodiments, as long as they are within the technical scope of the present invention.

EXAMPLE

(110) Hereinafter, the present invention will be specifically described with reference to Examples. It should be noted that the present invention is not limited to the following Examples, and can be modified, as appropriate, without departing from the scope of the present invention.

Example 1, Reference Example 1, Reference Example 2

(111) Organic EL panels in Example 1, Reference Example 1, and Reference Example 2 showing rated light emission spectra illustrated in FIG. 13 were prepared, and interviews were conducted to manicurists about easiness in selecting a nail gel color in a state where the human palm was irradiated with light emitted from the respective panels as illumination light.

(112) The color rendering indices CRI of the respective panels in rating are 86 in Example 1, 91 in Reference Example 1, and 82 in Reference Example 2. That is, these panels have high color rendering properties.

(113) As a result of the interview, some manicurists answered that they could select the nail gel color most easily when the palm was irradiated with light from the organic EL panel in Example 1. Further, some manicurists answered that the palm looked yellowish or amber when being illuminated with light from the organic EL panel in Reference Example 1, and that the palm looked greenish or bluish when being illuminated with light from the organic EL panel in Reference Example 2.

(114) Maximum intensity (MAX) and minimum intensity (MIN) in the wavelength range of 480 to 580 nm, fluctuation range, maximum peak intensity (PEAK) in the wavelength range of 580 to 680 nm, and (Intensity A at 480 nm)/(Intensity B at 580 nm) (hereinafter simply referred to as A/B) calculated from the light emission spectra in FIG. 13 are as follows.

(115) Note that A is the intensity at 480 nm and B is the intensity at 580 nm.

(116) Example 1: MAX=0.042, MIN=0.026, fluctuation range=0.47, PEAK=0.071, and A/B=0.034/0.042=0.81

(117) That is, in Example 1, the fluctuation range is 0.5 or less, PEAK is larger than MAX, and A/B is 0.8 or more.

(118) Reference Example 1: MAX=0.044, MIN=0.014, fluctuation range=1.03, PEAK=0.074, and A/B=0.021/0.041=0.51

(119) That is, in Reference Example 1, the fluctuation range is more than 0.5, PEAK is larger than MAX, and A/B is less than 0.8.

(120) Reference Example 2: MAX=0.047, MIN=0.011, fluctuation range=1.24, PEAK=0.070, and A/B=0.019/0.049=0.39

(121) That is, in Reference Example 2, the fluctuation range is more than 0.5, PEAK is larger than MAX, and A/B is less than 0.8.

(122) The panels in Example 1, Reference Example 1, and Reference Example 2 have high color rendering properties. However, the fluctuation range in Example 1 is smaller than the fluctuation ranges in Reference Example 1 and Reference Example 2, and the value of A/B in Example 1 is larger than the values of A/B in Reference Example 1 and Reference Example 2. This is considered to be the reason why the panel in Example 1 can provide illumination with higher recognition performance.

Assumed Example 2

(123) Illumination is provided by appropriately setting the arrangement or illuminance of a planar light source having a high skin-color recognition performance and a planar light source having a pseudo natural light forming function, or illumination is provided with an organic EL panel including an organic EL element having both a high skin-color recognition function and a pseudo natural light forming function, in order to emit light having an appropriate peak intensity and peak width. It is preferable that, with such configuration, a spectrum as close to the ideal spectrum shown in FIG. 14 as possible is obtained from the viewpoint of a recognition performance. When light is designed with a synthetic spectrum using a reaction field in two or more kinds of light sources or organic EL elements, the light is preferably designed to have a peak in a blue range from the viewpoint of reducing a manufacturing cost. It is considered that, according to the above configuration, white light having a high recognition performance and similar to natural light can be emitted.

EXPLANATION OF REFERENCE CHARACTERS

(124) 1: Light emission system 2: Short-wavelength light emission member 3: Pseudo natural light emission member 10: Casing 11: Short-wavelength light emitting source 15: Opening 35: Outer placement portion (placement portion) 50, 50a to 50d: planar light-emitting member (planar light source) 53: Main body (facing portion) 61: Coating space 100: Service receiver 101: Practitioner