Photocosmetic device

Abstract

The photocosmetic device according to the present disclosure includes a light source and a control unit. The light source outputs irradiation light to be irradiated to a target site. The control unit controls an output of the light source, a duty cycle of the light source, and a lighting frequency of the light source. A peak wavelength of the light source is included in a range of 600 nm to 980 nm. A spectral half-value width of the light source is included in a range of 20 nm to 80 nm. The control unit controls the light source such that the output of the light source is included in a range of 30 mW / cm 2 ~ 100 mW / cm 2 , the duty cycle of the light source is included in a range of 20% to 80%, and the lighting frequency of the light source is included in a range of 0.1 kHz to 30 kHz.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a photocosmetic device. BACKGROUND

[0002] The photocosmetic device has a light source. The light source outputs light to a target site. The photocosmetic device described in Patent Literature 1 outputs light having peaks at 520 nm, 660 nm, and 780 nm. The photocosmetic device described in Patent Literature 2 outputs light having peaks in the ranges of 570 nm to 600 nm and 750 nm to 850 nm.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Laid-Open No. 2018-507740

[0006] Patent Literature 2: Japanese Patent Application Laid-Open No. 2002-537940 SUMMARY

[0007] In a case where light is irradiated from a light source to a living body, the living body can be damaged. It is desirable that a photocosmetic device not easily cause damage to a living body.

[0008] The photocosmetic device of the present disclosure has a light source that outputs irradiation light to be irradiated to a target site, and a control section that controls an output of the light source, an illumination frequency of the light source, and a duty cycle of the light source, wherein a peak wavelength of the light source is included in the range of 600 nm to 980 nm, and a spectral half-value width of the light source is included in the range of 20 nm to 80 nm. The control section controls the light source so that the output of the light source is included in the range of 30 mW / cm 2 to 100 mW / cm 2 , the illumination frequency of the light source is included in the range of 0.1 kHz to 30 kHz, and the duty cycle of the light source is included in the range of 20% to 80%.

[0009] The photocosmetic device of the present disclosure does not easily cause damage to a living body. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a graph showing a model of a photocosmetic device.

[0011] Figure 2 is a graph showing a table indicating conditions and results of an experiment.

[0012] Figure 3 is a graph showing a table indicating conditions and results of an experiment.

[0013] Figure 4is a graph showing a table representing conditions and results of experiments.

[0014] Figure 5 is a graph showing a table representing conditions and results of experiments.

[0015] Figure 6 is a graph showing a table representing conditions and results of experiments. DETAILED DESCRIPTION

[0016] (Example of the light cosmetic device)

[0017] The light cosmetic device includes a light source that outputs irradiation light to be irradiated to a target site, and a control section that controls an output of the light source, an on-off frequency of the light source, and a duty ratio of the light source, wherein a peak wavelength of the light source is included in a range of 600 nm to 980 nm, a spectral half-value width of the light source is included in a range of 20 nm to 80 nm, the control section controls the light source so that the output of the light source is included in a range of 30 mW / cm 2 to 100 mW / cm 2 , the on-off frequency of the light source is included in a range of 0.1 kHz to 30 kHz, and the duty ratio of the light source is included in a range of 20% to 80%.

[0018] According to the above light cosmetic device, a damage to a living body is suppressed, and an effect of improving a state of the living body is improved.

[0019] In one example of the above light cosmetic device, the duty ratio of the light source is included in a range of 40% to 80%.

[0020] According to the above light cosmetic device, a more preferable effect can be obtained.

[0021] In one example of the above light cosmetic device, the duty ratio of the light source is included in a range of 40% to 60%.

[0022] According to the above light cosmetic device, a more preferable effect can be obtained.

[0023] In one example of the above light cosmetic device, the peak wavelength of the light source is included in a range of 820 nm to 980 nm.

[0024] According to the above light cosmetic device, a more preferable effect can be obtained.

[0025] In one example of the above light cosmetic device, the peak wavelength of the light source is included in a range of 900 nm to 980 nm.

[0026] According to the above light cosmetic device, a more preferable effect can be obtained.

[0027] In one example of the above-described photocosmetic device, the light source has a lighting frequency in the range of 10 kHz to 30 kHz.

[0028] According to the above-described photocosmetic device, a more preferable effect can be obtained.

[0029] (Embodiment)

[0030] As shown in FIG. 1, a photocosmetic device 10 includes a light source 20. The photocosmetic device 10 is, for example, a portable type or a stationary type. The light source 20 outputs irradiation light that is irradiated to a target site. The target site is, for example, a human skin. The irradiation light sometimes has a positive effect on the target site that is related to beauty. Figure 1

[0031] The light source 20 includes, for example, an LED (light emitting diode). In one example, the light source 20 includes a surface-mounted LED and a substrate. The LED is, for example, a GaAs-based LED. The LED is mounted on the substrate. In one example, the light source 20 includes a plurality of LEDs. The plurality of LEDs are electrically connected. The connection manner is, for example, selected from a series connection, a parallel connection, and a connection that is a combination of the series connection and the parallel connection.

[0032] The photocosmetic device 10 further includes a control section 30. The control section 30 is electrically connected to the light source 20. The control section 30 includes, for example, a processor. The control section 30 controls the light source 20. In one example, the control section 30 controls power input to the light source 20 by PWM control.

[0033] In one example, the photocosmetic device 10 further includes a housing 40, a power supply section 50, and a switch 60. The housing 40 constitutes an outer contour of the photocosmetic device 10. The housing 40 includes a casing 41 and a cover 42. The casing 41 includes an internal space 41A in which various elements that constitute the photocosmetic device 10 are arranged. The casing 41 is, for example, a resin molded product. As an example of a material of the casing 41, polycarbonate can be given. The cover 42 is mounted to the casing 41. The cover 42 protects the light source 20. The cover 42 is configured to transmit the irradiation light of the light source 20. The cover 42 is made of a transparent material. In one example, the cover 42 is made of a near-infrared transmitting material. As an example of the near-infrared transmitting material, quartz glass, an acrylic resin, and the like can be given.

[0034] The power supply section 50 is provided to the housing 40. In one example, the power supply section 50 is provided to the internal space 41A of the casing 41. The power supply section 50 is electrically connected to a power demand section P included in the photocosmetic device 10. The power supply section 50 supplies power of a primary cell, a secondary cell, or an external power source to the power demand section P. An example of the power demand section P is the light source 20 and the control section 30. An example of the external power source is a commercial AC power source.

[0035] ​The switch 60 is provided to the housing 41. The switch 60 is configured to be operable by a user. An operation state of the switch 60 is switched in correspondence with an operation of the switch 60. In a case where the operation state of the switch 60 is an off state, the electric power of the power supply section 50 is not supplied to the power demand section P. In a case where the operation state of the switch 60 is an on state, the electric power of the power supply section 50 is supplied to the power demand section P. The switch 60 is electrically connected to the control section 30.

[0036] A characteristic of the light source 20 is described. As the characteristic of the light source 20, for example, a peak number of the light source 20, a peak wavelength of the light source 20, a spectral half-value width of the light source 20, and a half-value angle of the light source 20 can be listed. The peak number of the light source 20 is the number of peaks in a spectrum of irradiation light. The peak wavelength of the light source 20 is the wavelength of a peak in a spectrum of irradiation light. The spectral half-value width of the light source 20 is the half-value width of a peak value in a spectrum of irradiation light.

[0037] The peak number of the light source 20 is exemplified. In a first example, the light source 20 has a single peak. In a second example, the light source 20 has a plurality of peaks. The peak wavelength of the light source 20 is exemplified. In a first example, the peak wavelength is included in a range of 600 nm to 980 nm. In a second example, the peak wavelength is included in a range of 820 nm to 980 nm. In a third example, the peak wavelength is included in a range of 900 nm to 980 nm. In the example in which the light source 20 includes a plurality of peaks, the peak wavelength is the peak wavelength corresponding to the largest output value in a spectrum of irradiation light. The spectral half-value width of the light source 20 is exemplified. In a first example, the spectral half-value width is included in a range of 20 nm to 80 nm. In a second example, the spectral half-value width is included in a range of 40 nm to 80 nm. The half-value angle of the light source 20 is exemplified. In a first example, the half-value angle is included in a range of ±5° to ±80°. In a second example, the half-value angle is included in a range of ±9° to ±70°.

[0038] The control of the control section 30 to the light source 20 is described. The control section 30 controls a prescribed control factor associated with the light source 20. In an example, the prescribed control factor includes an output of the light source 20, a duty ratio of the light source 20, and a lighting frequency of the light source 20.

[0039] The output of the light source 20 is exemplified. In an example, the output of the light source 20 is included in a range of 30 mW / cm 2 ~ 100 mW / cm 2The duty cycle of the light source 20 is exemplified. In a first example, the duty cycle is included in the range of 20% to 80%. In a second example, the duty cycle is included in the range of 40% to 80%. In a third example, the duty cycle is included in the range of 40% to 60%. The lighting frequency of the light source 20 is exemplified. In a first example, the lighting frequency is included in the range of 0.1 kHz to 30 kHz. In a second example, the lighting frequency is included in the range of 1 kHz to 30 kHz.

[0040] The photocosmetic device 10 can employ one or more modes determined in accordance with the characteristics of the light source 20 and the prescribed control factors. As the characteristics of the light source 20, for example, the peak number of the light source 20, the peak wavelength of the light source 20, the spectral half-value width of the light source 20, and the half-value angle of the light source 20 can be listed. As the prescribed control factors, for example, the output of the light source 20, the duty cycle of the light source 20, and the lighting frequency of the light source 20 can be listed. The control section 30 controls the light source 20 so that the output of the light source 20, the duty cycle of the light source 20, and the lighting frequency of the light source 20 are included in the ranges indicated in the respective modes.

[0041] The photocosmetic device 10 of the first mode includes the following structure.

[0042] The peak number is single. The peak wavelength is included in the range of 900 nm to 980 nm. The spectral half-value width is included in the range of 40 nm to 80 nm. The half-value angle is included in the range of ±5° to ±80°. The output is included in the range of 30 mW / cm 2 to 100 mW / cm 2 . The duty cycle is included in the range of 40% to 60%. The lighting frequency is included in the range of 10 kHz to 30 kHz.

[0043] The photocosmetic device 10 of the second mode includes the following structure.

[0044] The peak number is single. The peak wavelength is included in the range of 900 nm to 980 nm. The spectral half-value width is included in the range of 40 nm to 80 nm. The half-value angle is included in the range of ±5° to ±80°. The output is included in the range of 30 mW / cm 2 to 100 mW / cm 2 . The duty cycle is included in the range of 40% to 80%. The lighting frequency is included in the range of 10 kHz to 30 kHz.

[0045] The photocosmetic device 10 of the third mode includes the following structure.

[0046] The peak number is single. The peak wavelength is included in the range of 900 nm to 980 nm. The spectral half-value width is included in the range of 40 nm to 80 nm. The half-value angle is included in the range of ±5° to ±80°. The output is included in the range of 30 mW / cm 2 ~ 100 mW / cm 2 . The duty ratio is included in the range of 40% to 60%. The lighting frequency is included in the range of 0.1 kHz to 30 kHz.

[0047] The light cosmetic device 10 of the fourth mode includes the following structure.

[0048] The peak number is single. The peak wavelength is included in the range of 900 nm to 980 nm. The spectral half-value width is included in the range of 40 nm to 80 nm. The half-value angle is included in the range of ±5° to ±80°. The output is included in the range of 30 mW / cm 2 ~ 100 mW / cm 2 . The duty ratio is included in the range of 40% to 80%. The lighting frequency is included in the range of 0.1 kHz to 30 kHz.

[0049] The light cosmetic device 10 of the fifth mode includes the following structure.

[0050] The peak number is single. The peak wavelength is included in the range of 820 nm to 980 nm. The spectral half-value width is included in the range of 40 nm to 80 nm. The half-value angle is included in the range of ±5° to ±80°. The output is included in the range of 30 mW / cm 2 ~ 100 mW / cm 2 . The duty ratio is included in the range of 40% to 80%. The lighting frequency is included in the range of 0.1 kHz to 30 kHz.

[0051] The light cosmetic device 10 of the sixth mode includes the following structure.

[0052] The peak number is single. The peak wavelength is included in the range of 900 nm to 980 nm. The spectral half-value width is included in the range of 40 nm to 80 nm. The half-value angle is included in the range of ±5° to ±80°. The output is included in the range of 30 mW / cm 2 ~ 100 mW / cm 2 . The duty ratio is included in the range of 20% to 80%. The lighting frequency is included in the range of 0.1 kHz to 30 kHz.

[0053] The light cosmetic device 10 of the seventh mode includes the following structure.

[0054] The number of peaks is single. The peak wavelength is included in the range of 600 nm to 980 nm. The spectral half-value width is included in the range of 40 nm to 80 nm. The half-value angle is included in the range of ±5° to ±80°. The output is included in the range of 30 mW / cm 2 to 100 mW / cm 2 . The duty ratio is included in the range of 40% to 80%. The lighting frequency is included in the range of 0.1 kHz to 30 kHz.

[0055] The light cosmetic device 10 of the eighth mode includes the following structure.

[0056] The number of peaks is single. The peak wavelength is included in the range of 600 nm to 980 nm. The spectral half-value width is included in the range of 40 nm to 80 nm. The half-value angle is included in the range of ±5° to ±80°. The output is included in the range of 30 mW / cm 2 to 100 mW / cm 2 . The duty ratio is included in the range of 20% to 80%. The lighting frequency is included in the range of 0.1 kHz to 30 kHz.

[0057] (Example)

[0058] An experiment for confirming the cosmetic-related effect obtained by the light cosmetic device is described. The test subject is a three-dimensional cultured skin model. The three-dimensional cultured skin model has a layer of cells equivalent to a basal cell layer, a prickle cell layer, a granular cell layer, and a stratum corneum. As the three-dimensional cultured skin model used for the experiment, for example, a cultured model or a commercial product can be listed. As the three-dimensional cultured skin model of Kanebo, Ltd., for example, EPI-200, EPI-200X, EPI-606, EPI-606X can be listed. As the three-dimensional cultured skin model of Toyobo Co., Ltd., for example, TESTSKIN™ LSE, TESTSKIN™ LSE-d, TESTSKIN LSE-high can be listed. As the test subject, EPI-200 was selected as the three-dimensional cultured model.

[0059] The preparation process before irradiation of the irradiation light to the test subject was performed as follows. The test subject was placed on a maintenance medium in a culture chamber, and was cultured for a predetermined culture time based on a predetermined culture condition. As the predetermined culture condition, a temperature in the tank of about 37°C, a humidity in the tank of about 95%, and a CO2 concentration of about 5% were selected. As the predetermined culture time, about 24 hours was selected.

[0060] A chemical substance having a damaging effect on the skin is mixed with a solvent to produce a solution. The concentration of the chemical substance is adjusted to a prescribed concentration. In a preferred example, the prescribed concentration is determined so as to be a state in which the chemical substance has no effect or substantially no effect under in vivo conditions. The subject is immersed in the solution for a prescribed time. In a preferred example, the prescribed time is determined so as to be a time in which the solution does not substantially have an effect on the subject and the solution sufficiently contacts the cells of the subject. As the chemical substance, sodium lauryl sulfate is selected. As the prescribed concentration, 5% by mass is selected. As the prescribed time, 15 minutes is selected.

[0061] The immersed subject is washed with 10 ml of phosphate buffered physiological saline. The washed subject is transferred from the incubator to a cleaning table. After the subject is transferred, the subject is left until a prescribed standby time elapses. As the prescribed standby time, 20 minutes is selected. After the prescribed standby time elapses, the subject is irradiated with the irradiation light using the photo cosmetic device. The number of times of irradiation with the irradiation light is once a day. The irradiation period is 8 days. The number of times of irradiation during the irradiation period is a total of 8 times.

[0062] A subject which is not irradiated with the irradiation light (hereinafter referred to as "second subject") is prepared differently from the subject which is irradiated with the irradiation light (hereinafter referred to as "first subject"). The conditions for preparing the second subject are the same as those for the first subject except that the irradiation light is not irradiated. A prescribed number of the first subject and the second subject are prepared. As the prescribed number, 5 is selected.

[0063] As items for confirming the cosmetic effect obtained by the photo cosmetic device, the amount of trans-epidermal water loss (hereinafter referred to as "TEWL") and the damage grade are selected. The measurement of the TEWL and the damage grade is performed on the first subject and the second subject. The device used for the measurement of the TEWL is VAPO SCAN (manufactured by Sibata Scientific Technology, Ltd.). The damage grade is measured by visual measurement by an experimenter.

[0064] The TEWL recovery rate is calculated from the measurement result of the TEWL. The TEWL recovery rate is the ratio of the TEWL of the first subject to the TEWL of the second subject. With respect to the TEWL recovery rate, four grades of A to D are set. A is the case where the TEWL recovery rate is less than 0.7. B is the case where the TEWL recovery rate is 0.7 or more and less than 0.85. C is the case where the TEWL recovery rate is 0.85 or more and less than 1.0. D is the case where the TEWL recovery rate is 1.0 or more. With respect to the damage grade, two grades of A and B are set. A is the case where the subject is not confirmed to have damage. B is the case where the subject is confirmed to have slight thermal damage.

[0065] The TEWL recovery rate and the damage grade are calculated for each of the subjects. Figures 2 to 6Examples 1 to 36 and Comparative Examples 1 to 10 shown in Table 1 were subjected to the above experiment. In each of the examples and comparative examples, at least one of the experimental conditions listed below was set to a condition different from those of the other examples and comparative examples. The experimental conditions are peak wavelength, spectral half-value width, half-value angle, output, duty ratio, lighting frequency, irradiation time, and total energy. The number of peaks in each of the examples and comparative examples was single. It was confirmed that more preferable effects were obtained in the examples than in the comparative examples.

[0066] Further, the description of the above-described embodiments and examples is not intended to limit the modes that the light cosmetic device relating to the present disclosure can take. The light cosmetic device relating to the present disclosure can take modes different from those exemplified in the embodiments and examples. One example is a mode obtained by replacing, changing, or omitting a part of the structure of the embodiments and examples or a mode obtained by adding a new structure to the embodiments and examples.

[0067] The light cosmetic device of the present disclosure can be used for the cosmetic treatment of skin or the like.

[0068] Explanation of Reference Signs

[0069] 10: Light cosmetic device; 20: Light source; 30: Control unit

Claims

1. An optical cosmetic device, comprising: a light source that outputs irradiation light to be irradiated to a target site; and a control section that controls an output of the light source, an on frequency of the light source, and a duty cycle of the light source, wherein a peak wavelength of the light source is included in a range of 600 nm to 980 nm, wherein a spectral half-value width of the light source is included in a range of 40 nm to 80 nm, wherein the control section controls the light source so that: the on frequency of the light source is included in a range of 10 kHz to 30 kHz, and the duty cycle of the light source is included in a range of 20% to 80%, wherein a half-value angle of the light source is set in a range of ±5° to ±80°, and wherein the control section suppresses damage to the target site and improves a cosmetic effect by performing the above control with respect to the output of the light source, the on frequency of the light source, the duty cycle of the light source, and setting the half-value angle of the light source.

2. The optical cosmetic device according to claim 1, wherein the duty cycle of the light source is included in a range of 40% to 80%.

3. The optical cosmetic device according to claim 2, wherein the duty cycle of the light source is included in a range of 40% to 60%. wherein 4. The optical cosmetic device according to any one of claims 1 to 3, wherein the peak wavelength of the light source is included in a range of 820 nm to 980 nm.

5. The optical cosmetic device according to claim 4, wherein the peak wavelength of the light source is included in a range of 900 nm to 980 nm. ​ The output of the light source is comprised in the range of 30 mW / cm 2 ~ 100 mW / cm 2 2. The method of claim 1, wherein the output of the light source is comprised in the range of 30 mW / cm ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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