Skin treatment device

Abstract

Disclosed is a skin treatment device comprising: a facing section that faces a prescribed area of the skin of a user during use; and a plurality of first output devices that are arranged in the facing section, and apply an output to the skin during use. The plurality of first output devices are disposed such that the output acts uniformly over the prescribed area.

Description

[Technical Field]

[0001] The present disclosure relates to a skin treatment device. [Background technology]

[0002] BACKGROUND ART Various technologies for skin treatment devices (facial treatment devices) that irradiate light onto a user's skin are known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] WO2011 / 067941 Pamphlet Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional examples, it is difficult to make the light output from the skin treatment device act uniformly on the user's skin.

[0005] Therefore, an object of the present disclosure is to enable the light output from a skin treatment device to act uniformly on the user's skin. [Means for solving the problem]

[0006] In one aspect, a facing portion that faces a predetermined area of ​​a user's skin during use; a plurality of first output devices arranged in the opposing regions and configured to apply an output to the skin in use; A skin treatment device is disclosed, wherein the plurality of first output devices are arranged so that the outputs act uniformly over the predetermined range. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to make the light output from the skin treatment device act uniformly on the user's skin. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view showing the entire skin treatment device according to the present embodiment. [Figure 1A] FIG. 2 is a three-view diagram of the skin treatment device. [Figure 2] FIG. 2 is a perspective view of a portion of the front side of the skin treatment device as viewed from the back side. [Figure 3] FIG. 2 is a plan view showing a substrate on which a light source is mounted in the skin treatment device. [Figure 4] FIG. 4 is an enlarged view of a portion Q1 in FIG. [Figure 5] FIG. 4 is an enlarged view of part Q2 in FIG. [Figure 6] FIG. 2 is a perspective view of the back side of the skin treatment device as viewed from the front side. [Figure 6A] FIG. 10 is a schematic explanatory diagram of the function of the protrusion. [Figure 7] FIG. 10 is a diagram showing the results (test results) of evaluation of variations in output of a plurality of green LEDs in a high-density arrangement area according to the present embodiment. [Figure 8] FIG. 8 is a diagram showing evaluation results (test results) similar to those in FIG. 7, when the predetermined distance is 5 mm. [Figure 9] FIG. 8 is a diagram showing evaluation results (test results) similar to those in FIG. 7, when the predetermined distance is 10 mm. [Figure 10] FIG. 10 is an explanatory diagram of test results showing the usefulness of small LEDs among the LEDs forming multiple green LEDs. [Figure 10A] FIG. 11 is a diagram schematically illustrating the principle corresponding to the test results of FIG. 10. [Figure 11] FIG. 11 is an explanatory diagram of test conditions for reproducing the tests shown in FIGS. 7 to 10. [Figure 12] FIG. 1 is an explanatory diagram of the characteristics of light (green light) emitted from an LED. [Figure 13] FIG. 10 is a diagram showing test results relating to the melanin production inhibitory effect depending on the wavelength of light irradiated onto the skin. [Figure 14] FIG. 1 is a diagram showing test results (part 1) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 15]FIG. 10 is a diagram showing test results (part 2) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 16] FIG. 10 is a diagram showing test results (part 3) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 17] FIG. 10 is a diagram showing test results (part 4) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 18] FIG. 10 is a diagram showing test results (part 5) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 19] FIG. 10 is a diagram showing test results (part 6) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 20] FIG. 10 is a table showing the evaluation results obtained from the test results of FIGS. 4 to 9. [Figure 21A] FIG. 10 is a diagram showing test results (part 7) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 21B] FIG. 10 is a diagram showing test results (part 8) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 22A] FIG. 10 is a diagram showing test results (part 9) regarding the melanin production inhibitory effect of green LED light irradiation. [Figure 22B] FIG. 10 is a diagram showing test results (part 10) concerning the melanin production inhibitory effect of green LED light irradiation. [Figure 23] This is a table showing the relationship between the radiation intensity of green LED light and its effect (inhibition of melanin production). [Figure 24A] This is a graph (part 1) showing the relationship between the radiation intensity of green LED light and its effect. [Figure 24B] This is a graph (part 2) showing the relationship between the radiation intensity of green LED light and its effect. [Figure 24C] This is a graph (part 3) showing the relationship between the radiation intensity of green LED light and its effect. [Figure 25] FIG. 10 is a perspective view showing another skin treatment device. [Figure 26] FIG. 10 is an explanatory diagram of an example of use of a combination of skin treatment devices. [Figure 27]FIG. 2 is a diagram showing an outline of a control system for the light irradiation device. [Figure 28] FIG. 2 is a diagram illustrating an example of a hardware configuration of a control device. DETAILED DESCRIPTION OF THE INVENTION

[0009] Each embodiment will be described in detail below with reference to the accompanying drawings. Note that the dimensional ratios in the drawings are merely examples and are not limiting. Furthermore, shapes and the like in the drawings may be partially exaggerated for the sake of explanation. Furthermore, in the drawings, for ease of viewing, reference symbols may be assigned only to some of the parts that exist with the same attribute.

[0010] FIG. 1 is a perspective view showing the entire skin treatment device 1 according to this embodiment. FIG. 1A is a three-sided view of the skin treatment device 1. FIG. 2 is a perspective view of a part of the front portion 2 of the skin treatment device 1 extracted and viewed from the back side. FIG. 3 is a plan view of the substrate 70 on which the light source 60 is mounted in the skin treatment device 1 extracted. FIG. 4 is an enlarged view of part Q1 in FIG. 3. FIG. 5 is an enlarged view of part Q2 in FIG. 3. FIG. 6 is a perspective view of the back portion 3 of the skin treatment device 1 extracted and viewed from the front side. FIG. 6A is a schematic explanatory diagram of the function of the protrusion portion 43.

[0011] The skin processing device 1 is in the form of a mask to be worn on the user's face. The skin processing device 1 is provided so as to cover the user's face. In the following description, when the configuration of the skin processing device 1 is described in relation to the user's face, this relationship is expressed in the worn state unless otherwise specified. Note that in other embodiments, the skin processing device 1 may be in a form that can cover other parts instead of or in addition to the face (see FIG. 25, etc., described later).

[0012] In the following description of the configuration of the skin processing device 1, unless otherwise specified, the "front side" refers to the external side (the side visible from the outside) of the user when the device is worn, and the "rear side" refers to the side facing the user when the device is worn. Furthermore, the front view refers to the view along the front direction of the user when the device is worn.

[0013] The skin treatment device 1 is roughly divided into a front portion 2, a back portion 3, and a band portion 4.

[0014] The front part 2 is disposed on the front side of the back part 3. The front part 2 may be integrated with the back part 3. The front part 2 and the back part 3 may be connected by joining or fitting their outer edges together. The front part 2 may also be detachable from the back part 3.

[0015] The front portion 2 may be configured to cover substantially the entire face of the user. In this embodiment, the front portion 2 is configured to cover the entire face of the user except for the eyes. The front portion 2 may preferably be formed of a flexible material (e.g., a silicone-based material) so as to fit the shape of the face, which may vary from user to user.

[0016] The rear portion 3 is disposed behind the front portion 2. For example, the rear portion 3 may be configured to overlap the front portion 2 in a front view. The rear portion 3 may preferably be formed from a flexible material (e.g., a silicone-based material) so as to fit the shape of the face, which may vary from user to user.

[0017] The band part 4 is a part for maintaining the wearing state of the skin treatment device 1. The band part 4 may be formed of a flexible material, and may be provided with a hook-and-loop fastener-type length adjustment mechanism or a dial-type tightening mechanism. The length of the band part 4 may be adjustable to fit the head size, which may vary from user to user. The band part 4 may be integrated with the front part 2 and / or the back part 3.

[0018] In this embodiment, a substrate 70 for mounting the light source 60 is provided on the surface of the front side portion 2 facing the back side portion 3, as shown in FIG. 3 . The substrate 70 may be provided integrally with the front side portion 2. Alternatively, the substrate 70 may be provided detachably from the front side portion 2.

[0019] The substrate 70 may be formed of a flexible material so that it can elastically deform together with the elastic deformation of the front side portion 2. That is, the substrate 70 may be a flexible substrate. Note that, in addition to the plurality of light sources 60 described below, part or all of the control device 100 (see FIG. 27) may be mounted on the substrate 70.

[0020] A plurality of light sources 60 are mounted on the rear surface of the substrate 70. The plurality of light sources 60 are provided on the substrate 70 (and therefore on the front portion 2) in an orientation such that they irradiate light toward the user's skin. That is, the plurality of light sources 60 have an optical axis directed toward the user's skin and an emission surface directed toward the user's skin.

[0021] In this embodiment, the plurality of light sources 60 includes a plurality of green LEDs (Light Emitting Diodes) 61 that emit green light, and a plurality of other LEDs 62.

[0022] The multiple green LEDs 61 may have the same characteristics (for example, the same product number), but preferably are a combination of two or more types. In this embodiment, the multiple green LEDs 61 include two types of LEDs 611 and 612 with different rated outputs (or maximum outputs, the same applies below). LED 611 has a higher rated output than LED 612, and is therefore larger in size. Note that LEDs 611 and 612 may be mounted on substrate 70 in the form of surface-mounted components (chips). In a modified example, the two types of LEDs 611 and 612 do not necessarily need to be different in size, and may be approximately the same in size. This also applies to the other LEDs 62 described below.

[0023] The LEDs 611 may be arranged adjacent to each other at predetermined pitches P1 and P2, as shown in FIGS. 4 and 5. They may also be arranged regularly. However, the predetermined pitches P1 and P2 may differ for each area. For example, the predetermined pitch P1 for the LEDs 611 arranged in the area facing the user's forehead, as shown in FIG. 4, may be smaller than the predetermined pitch P2 for the LEDs 611 arranged in the area facing the outer part of the area around the user's eyes, as shown in FIG. 5. In other words, the LEDs 611 arranged in the area facing the user's forehead may be arranged more densely than the LEDs 611 arranged in the area facing the outer part of the area around the user's eyes.

[0024] Hereinafter, among the regions on the substrate 70, a region where the green LEDs 61 are arranged at a high density will also be referred to as a high-density arrangement region, and a region where the green LEDs 61 are arranged at a normal density will also be referred to as a normal arrangement region. Note that in this embodiment, as an example, in the high-density arrangement region, as shown in Fig. 4, four LEDs 611 are arranged at each vertex of a square with one LED 611 arranged at the center, whereas in the normal arrangement region, four LEDs 611 are arranged at each vertex of a parallelogram. As will be described later, the green LEDs 61 can emit green light with properties that exert a melanin production inhibitory effect. Therefore, the area on the substrate 70 facing the part of the user's face where the melanin production inhibitory effect is effective may be designated as a high-density arrangement area, and the green LEDs 61 may be arranged at a smaller predetermined pitch P1.

[0025] In this embodiment, the high-density arrangement region includes a region facing the user's forehead and a region facing the user's cheeks, as shown in Fig. 3. However, the normal arrangement region may not exist, and the high-density arrangement region may be set over the entire area.

[0026] In this embodiment, in addition to the LEDs 611, LEDs 612 are also arranged in the high-density arrangement region. Each LED 612 is preferably arranged between two adjacent LEDs 611. In this case, the LED 612 may be arranged at the midpoint between the two adjacent LEDs 611 (midpoint in a plan view). In this case, the LEDs 611 may be arranged such that the LEDs 611 are adjacent to each other at a predetermined pitch P1, and the LEDs 612 are adjacent to each other at a predetermined pitch P1, as shown in FIG.

[0027] The LEDs 612 may not be arranged in the normal arrangement region. Alternatively, the LEDs 612 may be arranged in the normal arrangement region at a lower density than in the high-density arrangement region. For example, the LEDs 612 may be arranged for only some of the combinations of two adjacent LEDs 611.

[0028] The other LEDs 62 may output light having a center wavelength in a wavelength range corresponding to red, infrared, or yellow. In this embodiment, the other LEDs 62 include red LEDs 621, infrared LEDs 622, and yellow LEDs 623.

[0029] Like the green LED 61, the red LED 621 may include two types of LEDs 6211, 6212 with different rated outputs. In this embodiment, the small LED 6212 is arranged in the center of an area formed by four adjacent large LEDs 6211 (four large LEDs 6211 located at the four corners) in the high-density arrangement area. In the high-density arrangement area, the LEDs 6211 may be arranged adjacent to each other at the same pitch (predetermined pitch P1) as the LEDs 611, as shown in FIG. 4.

[0030] The infrared LEDs 622 may be arranged at any desired location. As with the green LEDs 61, the infrared LEDs 622 may be configured with two or more types of LEDs with different rated outputs in a high-density arrangement area. In the high-density arrangement area, the infrared LEDs 622 may be arranged adjacent to each other at the same pitch (predetermined pitch P1) as the LEDs 611, as shown in FIG.

[0031] The yellow LED 623 is disposed between the adjacent red LED 621 and infrared LED 622. Similarly to the green LED 61, the multiple yellow LEDs 623 may include two types of LEDs 6231, 6232 with different rated outputs. In this embodiment, the small LED 6232 is disposed in the center of an area formed by four adjacent large LEDs 6231 in the high-density arrangement area. In the high-density arrangement area, the LEDs 6231 may be disposed adjacent to each other at the same pitch (predetermined pitch P1) as the LEDs 611, as shown in FIG. 4.

[0032] In this embodiment, the green LED 612 is disposed between two adjacent LEDs 611 vertically and horizontally, but this is not limiting. For example, instead of or in addition to this, the LED 612 may be disposed between two adjacent LEDs 611 diagonally. Alternatively, the LED 612 may be disposed at the center of an area formed by four adjacent LEDs 611, similar to the red LED 621 and yellow LED 623. In a modified example, one or more small LEDs may be disposed within an area surrounded by three or more large LEDs for green, red, infrared, or yellow (e.g., a circumscribed polygonal area encompassing each of the three or more large LEDs). In this case, the one or more small LEDs may be disposed near the center of the area surrounded by the three or more large LEDs. Here, "near the center" refers to a relationship in which the distance from the center of the area surrounded by the three or more large LEDs is equal to or less than the minimum distance from the three or more large LEDs.

[0033] In this embodiment, the back portion 3 is provided with a protrusion 43 as a distance control means (spacer) on the side corresponding to the front portion 2. The protrusion 43 may be formed integrally with the back portion 3, or may be formed as a separate piece and integrated with the back portion 3. In the former case, the protrusion 43 is formed of the same material as the back portion 3 (e.g., a flexible material). The protrusion 43 has a function of determining the distance between the user's skin and the substrate 70 so that the substrate 70 (and therefore the light source 60 on the substrate 70) is spaced apart from the user's skin by a predetermined distance D1 or more. In this embodiment, as schematically shown in FIG. 6A , the protrusion 43 has a function of determining the distance between the user's skin and the light source 60 on the substrate 70 so that the separation distance between the user's skin and the light source 60 on the substrate 70 is maintained at approximately the predetermined distance D1. The front end surface 430 of the protrusion 43 can abut against the front portion 2. When the skin treatment device 1 is attached, each protrusion 43 may be configured so that the front end surface 430 abuts against the front portion 2. When the front end surface 430 of the protrusion 43 abuts against the front portion 2, the protrusion 43 restricts further reduction in the distance between the front portion 2 and the back portion 3. In this embodiment, the protrusion 43 has a height corresponding to the predetermined distance D1. For example, the protrusion 43 may have a height that is the same as the predetermined distance D1 or that is slightly greater than or smaller than the predetermined distance D1. Preferred examples of the predetermined distance D1 will be described later.

[0034] In this embodiment, there is a space between the front portion 2 and the back portion 3 where the protrusions 43 are not arranged. That is, the outer periphery of the protrusions 43 is a space. This reduces the weight of the entire skin treatment device 1, while improving the conformability to the shape of the skin surface in the area of ​​the back portion 3 (and the front portion 2) where the protrusions 43 are not arranged.

[0035] A plurality of protrusions 43 are provided so as to define the distance between each light source 60 and the user's skin. In this case, each protrusion 43 may be arranged so as to be able to abut against an area near each light source 60 on the front side portion 2. However, each protrusion 43 is arranged so as not to abut against each light source 60 on the front side portion 2. In other words, each protrusion 43 may be arranged so as to be able to abut against a position on the front side portion 2 that avoids each light source 60. This allows the path (optical path) of light from each light source 60 to not include each protrusion 43, so that light from each light source 60 can efficiently reach the user's skin. In other words, light from each light source 60 can efficiently reach the user's skin while maintaining the separation distance between the user's skin and the light source 60 on the substrate 70 at approximately the predetermined distance D1.

[0036] The protrusions 43 are preferably made of a light-transmitting material, so that even when light from each light source 60 hits the protrusions 43, the light from each light source 60 can efficiently reach the user's skin.

[0037] The surface shape of this type of mask can be (three-dimensionally) shaped to fit the surface shape and size of an average person's face. However, since the surface shape of a person's face varies from person to person, it may not be possible to shape the surface shape of a mask that fits all users.

[0038] In this regard, in this embodiment, the back side portion 3 (and the front side portion 2) is shaped (three-dimensionally) to fit the surface shape and size of an average human face, and is made of a flexible material. Furthermore, in this embodiment, a plurality of protrusions 43 are further provided. As a result, this embodiment can achieve a state in which the separation distance between the user's skin and the light source 60 on the substrate 70 is maintained at approximately the predetermined distance D1, even for relatively diverse facial surface shapes. That is, the back side portion 3 (and the front side portion 2) elastically deforms to follow the surface shape of the user's face, and the separation distance between the skin and the light source 60 can be maintained at approximately the predetermined distance D1 by the plurality of protrusions 43.

[0039] In this embodiment, the multiple protrusions 43 have substantially the same shape, but may be formed in multiple different shapes. Furthermore, the multiple protrusions 43 have a circular cross section, but may have other cross-sectional shapes, or the cross section may vary depending on the position in the height direction. For example, the multiple protrusions 43 may have a circular cross section in which the cross-sectional area decreases toward the end surface 430.

[0040] In addition, in this embodiment, the plurality of protrusions 43 are used to maintain the distance between the user's skin and the light source 60 on the substrate 70 at approximately the predetermined distance D1. However, the same function may be achieved by forming the back portion 3 from a plurality of parts instead of or in addition to the plurality of protrusions 43. That is, the back portion 3 may be divided into a plurality of sections, and each section may be configured to be independently deformable or displaceable in accordance with the contours of the skin. In this case, the back portion 3 and / or the front portion 2 may be formed from a hard material.

[0041] Next, the effects of this embodiment will be described with reference to Figures 7 to 11. In the following description, the skin area of ​​the user's skin facing the above-mentioned high-density arrangement area will be referred to as the target skin area (an example of a predetermined area). Therefore, the part of the high-density arrangement area in the back side part 3 forms the part facing the target skin area (an example of a facing part).

[0042] In this embodiment, the multiple green LEDs 61 are arranged in the high-density arrangement area so that the output acting on the user's skin is uniform. That is, the multiple green LEDs 61 are arranged so that the output acts uniformly across the target skin area. In this specification, "uniform" refers to a state in which, when the maximum value of the output level acting across the target skin area is 1, the range in which the output level is 0.5 or higher accounts for 70% or more of the target skin area. Further uniformity can be achieved if, when the maximum value of the output level acting across the target skin area is 1, the range in which the output level is 0.5 or higher or 0.6 or higher accounts for 80% or more of the target skin area. In this embodiment, such further uniformity is achieved as described below with reference to FIGS. 7 to 11.

[0043] FIG. 7 is a diagram showing the results of evaluation (test results) of the output variation of the multiple green LEDs 61 in the high-density arrangement area according to this embodiment. In the upper part of FIG. 7, the output (irradiation intensity) for the rectangular area corresponding to the target skin area is shown as a distribution of absolute values, with hatching. The irradiation intensity corresponding to each hatched area is as shown in the legend in the figure. In the lower part of FIG. 7, the output (irradiation intensity) for the rectangular area corresponding to the target skin area is shown as a distribution of relative values, with hatching. The irradiation intensity corresponding to each hatched area is as shown in the legend in the figure. The relative values ​​are relative values ​​when the maximum value of the irradiation intensity is set to 1. In the example shown in FIG. 7, the maximum value (peak) of the irradiation intensity is 11.0 mW / cm, which is within the desirable range described below. 2 11.4mW / cm 2 is.

[0044] Here, a preferable range of the above-mentioned predetermined distance D1 will be explained in comparison with FIG. 8 and FIG.

[0045] Figures 8 and 9 show the results of the test shown in Figure 7 with different predetermined distances D1. Specifically, in the test shown in Figure 7, the predetermined distance D1 was 7 mm, whereas in the tests shown in Figures 8 and 9, the predetermined distances D1 were 5 mm and 10 mm, respectively.

[0046] When the predetermined distance D1 is 5 mm, as shown in FIG. 8, the maximum value (peak) of the irradiation intensity is 13.6 mW / cm 2 However, as can be seen from the test results for the relative values ​​on the bottom, the variation in irradiation intensity becomes significantly larger. Specifically, when the maximum value is set to 1, the range in which the output level is between 0.4 and 0.6 becomes relatively wide.

[0047] In contrast, when the specified distance D1 is 7 mm, as shown in Figure 7, when the maximum value is 1, there is almost no range in which the output level is between 0.4 and 0.6, and it can be seen that more uniformity is achieved than when the specified distance D1 is 5 mm.

[0048] When the predetermined distance D1 is 10 mm, as shown in Figure 9, there is almost no variation in the irradiation intensity, but the maximum value (peak) of the irradiation intensity is 8.66 mW / cm 2 and is insufficient.

[0049] From this, by adjusting the above-mentioned predetermined distance D1, the maximum value (peak) of the irradiation intensity can be set to the desired value (11.0 mW / cm 2 ) or more, uniformity can be achieved. In this embodiment, it is understood that the predetermined distance D1=7 mm or its vicinity is a desirable range.

[0050] 10 is an explanatory diagram of test results showing the usefulness of LED 612, one of LEDs 611 and 612 that form the above-described plurality of green LEDs 61. In FIG. 10, the top and bottom of the left side (Case 1) show test results relating to a configuration in which LED 612, one of LEDs 611 and 612, is not present, and the top and bottom of the right side (Case 2) show test results relating to this embodiment in which both LEDs 611 and 612 are provided. Note that the top and bottom respectively represent the above-described absolute value evaluation and relative value evaluation, and their meanings are as described above.

[0051] As is clear from comparing the left and right sides in Figure 10, it is clear that uniformity can be improved by adding the LED 612. This test showed that when the LED 612 is added (Case 2), the variation can be reduced by about 72% compared to when it is not added (Case 1).

[0052] This effect can be inferred from the principle shown schematically in FIG. 10A. In FIG. 10A, if two adjacent LEDs 611 are designated L1 and L2, the light intensity distribution of both LEDs is theoretically as shown in FIG. 10A (a). When the LEDs are arranged at the half-angle distance of the LEDs, the light intensity between the two LEDs is 1.0:0 at L1 and L2, and 0.5:0.5 at intermediate half-angle distances, maintaining uniformity in the area between L1 and L2. However, in reality, due to the effects of diffusion and attenuation, the light intensity of L2 (or L1) is weak and not zero near L1 (or L2), as shown in FIG. 10A (b). Therefore, uniform illumination is not achieved in the area between L1 and L2, resulting in uneven lighting. Therefore, as shown in (c) of Fig. 10A, an LED 612 (denoted as L3 in Fig. 10A) that is smaller in size and has lower output than the LED 611 is placed in the middle position between L1 and L2 where light unevenness occurs. This complements the light intensity and makes it possible to make the light intensity uniform in the section between L1 and L2.

[0053] It is also possible to add LED 611 instead of LED 612 at the midpoint between L1 and L2, but in this case, the light intensity directly below L1 and L2 will increase, which may result in an excessively large maximum value (peak) of the irradiation intensity, or the desired uniformity may not be achieved. Furthermore, in addition to the green LED 61, the substrate 70 must also have mounting areas for multiple other LEDs 62, free space for the protrusions 43 to abut, and the like. Therefore, it may be impossible to densely arrange the LEDs 612, which require a relatively large mounting area.

[0054] In this regard, the relatively small LED 612 requires only a relatively small mounting area and is therefore suitable for mounting in a high-density arrangement area. In other words, by using a combination of LED 611 and LED 612, it is possible to densely arrange a plurality of green LEDs 61 and a plurality of other LEDs 62 in a high-density arrangement area, and it is easy to ensure a free area for the protrusion 43 to abut.

[0055] Furthermore, according to this embodiment, with respect to the red LEDs 621, the small LEDs 6212 are also arranged in the high-density arrangement area at the center of the area formed by four adjacent large LEDs 6211, as described above. This similarly makes it possible to equalize the output of the red LEDs 621 over the target skin area facing the high-density arrangement area, and also makes it easier to ensure a free area for the protrusions 43 to abut against. Note that with respect to the red LEDs 621, when the predetermined distance D1 is 7 mm, it is preferable that the output of the red LEDs 621 be 10 mW / cm 2 Furthermore, the red LED 621 has a peak output of preferably 50 mW / cm 2 or more when the predetermined distance D1 is 7 mm, in combination with the infrared LED 622. 2 It has a peak output of more than 1000kJ / s.

[0056] Furthermore, according to this embodiment, the small LED 6232 of the yellow LED 623 is also arranged in the center of the area formed by four adjacent large LEDs 6231 in the high-density arrangement area, as described above. This similarly makes it possible to equalize the output of the yellow LED 623 over the target skin area facing the high-density arrangement area, and also makes it easier to ensure a free area for the protrusion 43 to abut. Note that, with regard to the yellow LED 623, when the predetermined distance D1 is 7 mm, it is preferable that the output of the yellow LED 623 be 5 mW / cm. 2 and more preferably, a peak power of 10 mW / cm 2 It has the following peak power output:

[0057] In a modified example, the densely arranged multiple green LEDs 61 or other LEDs 62 may be replaced with other colors. For example, depending on the effect or purpose of the desired uniform illumination, one or more types of LEDs with different wavelengths may be similarly arranged to achieve the same uniform illumination.

[0058] FIG. 11 is an explanatory diagram of test conditions for reproducing the tests shown in FIGS. 7 to 10 described above.

[0059] The tests shown in FIGS. 7 to 10 can be reproduced under the test conditions (test method) shown in FIG.

[0060] 11, the upper part shows a plan view of the test apparatus 5, and the lower part shows a side view of the test apparatus 5. The test apparatus 5 includes an XY stage 500 and a Z stage 520. The Z stage 520 is movable in three axial directions relative to the XY stage 500, and the separation distance H11 is adjustable. In FIG. 11, arrow R11A corresponds to the Z direction corresponding to the up-down direction, arrow R11B corresponds to the X direction perpendicular to the Z direction, and the Y direction (not shown) corresponds to the direction perpendicular to the paper surface (XZ plane).

[0061] A test object 510 is placed on the XY stage 500. The test object 510 is the back portion 3 and the substrate 70 (including the light source 60) in the high-density arrangement area of ​​the skin treatment device 1. At this time, the back portion 3 and the substrate 70 are laid out flat on the XY stage 500 with the back portion 3 facing upward. The back portion 3 and the substrate 70 may be arranged separately and in order so as to reproduce the same positional relationship as in the product state. A rubber sheet with protrusions may be used instead of the back portion 3. In this case, the height of the protrusions may be set to a height corresponding to the predetermined distance D1, and the material of the rubber sheet may have the same properties (light transmission properties) as the back portion 3, such as silicone rubber.

[0062] A light intensity measuring device (optical power meter) 530 is attached to the Z stage 520. The light intensity measuring device 530 may be, for example, a spectrometer manufactured by Hangzhou Hopoo Light & Color Technology Co., Ltd.

[0063] During the test, the Z stage 520 is adjusted for each measurement point so that the light-receiving sensor of the light intensity measuring device 530 touches the backside portion 3 (or the surface of the rubber sheet). The measurement points are set within a measurement range (e.g., a 20 × 20 mm range) and may be moved at a predetermined pitch (5 mm pitch). In this case, the measurement range and the predetermined pitch may be set so that the LED 611 is positioned at the center of the measurement range. The number of measurement points may be set depending on the size of the high-density arrangement area so that the entire high-density arrangement area is covered. The measurement results are visualized (e.g., graphed in Excel by coloring the grid) as shown in each test result in Figures 7 to 10 above, and may be evaluated in two ways: absolute values ​​and values ​​relative to the maximum value.

[0064] Next, the characteristics of the green light emitted from the green LED 61 will be described with reference to FIGS.

[0065] Fig. 12 is an explanatory diagram of the characteristics of light (green light) emitted from the green LED 61, with wavelength on the horizontal axis and intensity on the vertical axis, showing an example of the characteristics. Fig. 13 is a diagram showing test results related to the melanin production inhibitory effect depending on the wavelength of light irradiated on the skin. Fig. 13 shows test results for cell viability, melanin production rate, and melanin production rate per cell when irradiated with green LED 61 at wavelengths of 450 nm, 520 nm, and 850 nm. In Fig. 13, the "control" refers to the test result when no light was irradiated.

[0066] The green LED 61 is preferably a light source that generates green light having a center wavelength in the wavelength range of 490 nm or more and 525 nm or less.

[0067] As can be seen from Figure 13, although significant suppression of melanin production was confirmed at wavelengths of 520 nm and 450 nm, it was also suggested that the melanin production suppression effect may be greater at 520 nm than at 450 nm. Although a slight tendency for suppression was observed at a wavelength of 850 nm, there was no significant difference, and it was the lowest result.

[0068] More preferably, the green light has a central wavelength of approximately 505 nm, as shown in Fig. 12. With such a central wavelength, melanin production in the irradiated area of ​​the user's skin can be suppressed more effectively than in cases where the central wavelength is not 505 nm, as will be described later. For example, the green light can be irradiated in a manner that has a 10% or more better melanin production suppression effect in the irradiated area of ​​the user's skin than when the green light is not irradiated.

[0069] The green light preferably has a half width at half maximum (see FIG. 12) of ±20 nm or less, and more preferably about ±10 nm, which can maximize the effect of suppressing melanin production in the irradiated area of ​​the user's skin.

[0070] The green light is preferably 5 mW / cm 2 or more and 30mW / cm 2 The radiation intensity is in the following range: The test results will be described later with reference to Figure 23 onwards.

[0071] Also, preferably, the green light is 5 J / cm 2 or more and 30J / cm 2 The irradiation energy range is as follows:

[0072] It is also possible to mount multiple green LEDs 61 on a single chip. Alternatively, the green LED 61 may be combined with other LEDs having different center wavelengths on a single chip. For example, when the green LED 61 and a red LED are combined on a single chip, the ratio of the number of green LEDs to the number of red LEDs on a single chip may be appropriately adjusted.

[0073] Next, the effect of the above-mentioned green light (the effect of suppressing melanin production) will be described based on examples.

[0074] (Example) Visible light is minimally invasive to the body, and various studies have been conducted on its effects on the body with the aim of applying it to medical and cosmetic dermatology fields (Imagawa et al., Japan Journal of Medical Sciences, 32, 444 (2012)). For example, it has been reported that red light prevents skin aging, and that green and yellow light play an important role in suppressing excessive cellular activity.

[0075] Melanin, the pigment that causes pigmentation in the skin, is produced in melanocytes and plays an important role in preventing DNA damage from harmful ultraviolet rays. However, it is also the cause of age spots, and there is a high demand for improving this. Therefore, we tested the effectiveness of green LED light, which suppresses cellular activity, to see if it also affects melanoma activity and reduces melanin production.

[0076] The melanin production inhibitory effect of green LED was evaluated using mouse-derived B164A5 cells (B16 melanoma cells, RIKEN BRC) and human-derived melanoma cells (HMV-II cells, KAC Co., Ltd.) obtained at Toin University of Yokohama upon request. Ushio Inc.'s SMT525 (wavelength 525 nm) and SMT505 (wavelength 505 nm) green LED light sources were used.

[0077] (B16 melanoma cell viability) B16 melanoma cells were plated in a 6-well plate at 1 × 10 4 and 2 × 10 4 Cells / mL were seeded and incubated at 37°C, CO 2 After culturing for three days at a concentration of 5%, the medium was replaced with phenol red-free medium. Irradiation with a green LED was performed once a day for three days, followed by culturing for one day. Cell Counting Kit-8 (Dojindo Laboratories, Inc.) was then added and the cells were cultured for three hours. After culturing, the medium was dispensed, and the absorbance at 450 nm was measured to calculate the number of surviving cells. The higher the absorbance at 450 nm, the greater the number of surviving cells.

[0078] (Evaluation of melanin production inhibition by B16 melanoma cells) B16 melanoma cells were plated in a 6-well plate at 1 × 104 and 2 × 10 4 Cells / mL were seeded and incubated at 37°C, CO 2 After culturing for 3 days at a 5% concentration, the medium was replaced with phenol red-free medium containing 100 nM of the melanin synthesis inducer α-MSH. After irradiating with green LED once daily for 3 days and culturing for 1 day, the cells were washed with 1 mL of PBS(-) and lysed in 2 mol / L aqueous sodium hydroxide solution containing 10 wt% dimethyl sulfoxide (DMSO). The amount of melanin produced was measured by absorbance at 405 nm. Furthermore, the amount of cell-derived protein was measured using the RC DC® Protein Assay (BioRad). Based on the measurement results, the amount of melanin per amount of cell-derived protein was calculated.

[0079] (Melanin production suppression effect of green LED light irradiation) It was confirmed that irradiation with green LED light of wavelengths 505 and 525 nm reduced the number of viable B16 melanoma cells and the amount of melanin production. This tendency was more pronounced with 505 nm green LED light. This can be seen from the test results shown in Figures 14 and 15. Figure 14 shows the number of viable B16 melanoma cells when irradiated with green LED light of wavelength 505 nm, and Figure 15 shows the number of viable B16 melanoma cells when irradiated with green LED light of wavelength 525 nm. In this test, the initial cell concentration was 1 x 10 4 (Cells / mL) and 2×10 4 (Cells / mL), and the concentrations after 30 and 60 minutes were measured, respectively.

[0080] (Evaluation of melanin production inhibition by HMV-II in human-derived HMV-II melanoma cells) It has been reported that mouse-derived B16 melanoma cells and human-derived HMV-II melanoma cells have different drug sensitivities to skin whitening agents. In the evaluation of the B16 cells, the melanin production inhibitory effect was more pronounced with 505 nm green LED light, so the wavelength was narrowed to 505 nm to evaluate its effect on HMV-II cells.

[0081] Unlike B16 cells, the melanin synthesis inducer α-MSH had a low effect on the proliferation of melanoma cells in HMV-II cells. Therefore, theophylline, an MSH enhancer, was used as a melanin synthesis inducer to evaluate HMV-II cells. Dispense 2 mL of 1 × 104 cells / mL HMV-II cell suspension into a 66-well plate. 4 Cells / mL were seeded and incubated at 37°C, CO 2 After culturing for 3 days at a 5% concentration, the medium was replaced with 2 mL of phenol red-free medium containing 25 μL of theophylline. After culturing for 3 days under 40 mM ethanol, the medium was replaced with 2 mL of phenol red-free medium containing 25 μL of theophylline. Irradiation with 505 nm LED light was performed once daily for 3 days, followed by culturing for 1 day. The cells were lysed in 300 μL of 2 M NaOH solution containing 10 wt% dimethyl sulfoxide (DMSO) and 2 mol / L aqueous sodium hydroxide solution, and the melanin production was measured from the absorbance at 405 nm. Furthermore, the amount of cell-derived protein was measured using the RC DC® Protein Assay (BioRad). Based on the measurement results, the amount of melanin per cell-derived protein was calculated.

[0082] (survival rate by HMV-II cells) HMV-II cells were cultured in a 6-well plate at 1 x 10 4 Cells / mL were seeded and incubated at 37°C, CO 2 After culturing for three days at a 5% concentration, the medium was replaced with phenol red-free medium. The cells were irradiated with 505 nm LED light once a day for three days, followed by culturing for one day. Cell Counting Kit-8 (Dojindo Laboratories, Inc.) was then added and the cells were cultured for three hours. After culturing, the medium was dispensed and the absorbance at 450 nm was measured. After the measurement, the survival rate was calculated as a relative value to the absorbance at 450 nm without LED light irradiation.

[0083] (Melanin production suppression effect of green LED light irradiation) It was confirmed that irradiation with 505 nm LED light reduced the survival rate of HMV-II cells and reduced melanin production.

[0084] It was verified that green LED light irradiation is effective in suppressing melanin production in both B16 cells and HMV-II cells. This can be seen from the test results shown in Figures 16 to 19. Figure 20 is a table of the evaluation results obtained from the test results in Figures 16 to 19. As can be seen from these, 505 nm had a greater effect on melanin production suppression than 525 nm, and the effect was more pronounced after 20 minutes than after 10 minutes. Furthermore, while 505 nm showed suppression even after 30 and 60 minutes, 525 nm did not show any suppression effect after 30 minutes, but did show suppression after 60 minutes.

[0085] This example demonstrated the effect of suppressing the production of melanin, which causes dark spots, when using green LED light, particularly at a wavelength of 505 nm. This can be seen from the test results shown in Figures 21A to 22B. Figures 21A and 21B show the results of the first and second tests, respectively, and Figures 22A and 22B show the results of the first and second tests, respectively.

[0086] Figures 23 to 24C are figures showing other test results, where Figure 23 is a table showing the relationship between the radiation intensity of green LED light and the effect (the effect of suppressing melanin production), and Figures 24A to 24C are graphs showing the relationship between the radiation intensity of green LED light and the effect.

[0087] Other tests were performed as follows. B16 melanoma 4A5 cells were provided by RIKEN BRC. The following cell cultures refer to these cells. Cells were cultured as described in steps S1 to S3 below, using the following media. Dulbecco's Modified Eagle Medium (DMEM, Cat. No. 10566-016, Gibco, USA) containing 10.0% (v / v) Fetal Bovine Serum (FBS, Cat. No. SH30071.03, Hyclone®, UK) and 1.0% (v / v) antifungal agent (Antibiotic-Antimycotic 100X, Cat. No. 15240-062, Invitrogen, USA) was used. DMEM containing 10% FBS was prepared with 100 nM α-Melanocyte stimulating hormone (α-MSH, Cat. No. M4135, Sigma-Aldrich, USA) and 100 μM theophylline (Cat. No. T1633, Sigma-Aldrich, USA). Step S1: Cell culture and passaging 3.0 × 10 cells were placed in a 60 mm dish (Cat. No. 353002, Falcon®, USA). 5 Seed the cells at a density of 100 cells / dish and incubate in CO. 2 Inside the incubator (CO 2 The mixture was cultured at 5% CO₂Cl, 37°C for 24 hours. Step S2: Irradiate with green LED light The medium was removed, washed with phosphate buffered saline (PBS(-), Cat. No. 198601, Nissui, Japan), and then replaced with 8 mL of Hank's balanced salt solution (HBSS(+), Cat. No. 084-08965, Wako, Japan). The irradiation equipment was then applied according to the irradiation conditions. The HBSS(+) was then removed and replaced with 3 mL of test medium, and the cells were cultured for 72 hours. Step S3: After culturing and washing with PBS, the cells were treated with 2 mL of alamarBlue (registered trademark) solution prepared by diluting alamarBlue (registered trademark) (Cat No. DAL1100, Invitrogen (registered trademark), USA) 10-fold with serum-free DMEM, and then incubated with CO 2The cells were cultured in an incubator at 37°C for 2 hours. 200 μL of the alamarBlue solution was collected and placed in a 96-well plate (Cat No. 9017, Costar, USA). The absorbance at 570 nm and 600 nm (OD570, OD600) was measured using a microplate reader (SPARK® 10M, TECAN, Switzerland). The alamarBlue solution was used as a blank. The alamarBlue solution was removed from the 60 mm dish and washed with PBS(-). To solubilize the melanin, 1 mL of 1 M aqueous sodium hydroxide solution containing 10% DMSO was added and incubated at 85°C for 10 minutes. 100 μL of the melanin solution was placed in a 96-well plate, and the absorbance at 405 nm (OD405) was measured using a microplate reader. The OD570-600 of the control was set at 100%, and the cell viability of the LED-treated group was calculated. The melanin production rate was calculated by setting the OD405 of the control as 100%. Furthermore, the melanin production rate per cell was calculated by dividing the OD405 of the control and LED irradiation groups by the OD570-600 measured with alamarBlue. A significant difference test was performed between the control and LED irradiation groups using an unpaired t-test. All tests were two-sided, with a significance level of less than 5%.

[0088] As can be seen from Figures 23 to 24C, when B16 melanoma cells were irradiated with a green LED (505 nm), the melanin production rate was significantly lower than that of the control at all output levels, demonstrating the suppression of melanin production. 2 ~11.5mW / cm 2 The highest output of 11.5mW / cm 2 In the application, the melanin production rate per cell was also significantly lower than in the control, and the highest output among these conditions showed a tendency for the production ability to be more suppressed.

[0089] Next, with reference to FIGS. 25 and 26, an example of how to use the skin treatment device 1 of this embodiment will be described.

[0090] As shown in FIG. 26, the skin processing device 1 of this embodiment may be used together with another skin processing device 1A as shown in FIG. 25. In FIG. 25, the other skin processing device 1A is configured to cover the user's neck. The configuration of the skin processing device 1A may also be similar to that of the skin processing device 1. However, the arrangement and configuration of the light source 60 in the skin processing device 1A may differ from those in the skin processing device 1.

[0091] Next, a control system of the skin treatment device 1 will be described with reference to FIG. 27 and subsequent figures.

[0092] FIG. 27 is a diagram showing an outline of a control system of the skin treatment device 1. As shown in FIG.

[0093] The skin processing device 1 includes a control device 100, to which a power source 90 and a green LED 61 are electrically connected. The control device 100 operates based on power from the power source 90 and controls the light source 60 (such as the green LED 61). For example, the green LED 61 operates based on power from the power source 90 under the control of the control device 100. The power source 90 may include an external power source and / or an internal power source. The internal power source may be a rechargeable battery.

[0094] In this embodiment, the control device 100 irradiates the skin with green light via the green LED 61. At this time, the control device 100 may realize continuous light irradiation for one minute or more, in which the proportion of the irradiation time of green light is half or more.

[0095] Furthermore, the control device 100 may control the emission of light from the green LED 61 in one or more operation modes. The one or more operation modes may include a predetermined operation mode associated with the melanin production suppression effect or a predetermined operation mode associated with an effect related to the melanin production suppression effect. In this case, the control device 100 causes the head unit to output green light in the predetermined operation mode.

[0096] Note that the control device 100 may have another mode in which light is irradiated onto the skin via other LEDs 62, in addition to the mode in which green light is irradiated onto the skin via the green LED 61. The other modes may include a mode in which light is irradiated onto the skin via a plurality of red LEDs 621, a mode in which light is irradiated onto the skin via a plurality of infrared LEDs 622, and a mode in which light is irradiated onto the skin via a plurality of yellow LEDs 623. In these cases, each mode may be implemented independently of one another, or may be implemented in any combination of two or more of them.

[0097] The control device 100 may be capable of controlling not only the skin treatment device 1 but also a skin treatment device 1A shown in FIG.

[0098] Fig. 28 is a diagram showing an example of the hardware configuration of the control device 100. Fig. 28 shows a schematic diagram of a light source 60 included in the control target in association with the hardware configuration of the control device 100.

[0099] The control device 100 includes a CPU (Central Processing Unit) 11, a RAM (Random Access Memory) 12, a ROM (Read Only Memory) 13, an auxiliary storage device 14, a drive device 15, and a communication interface 17, all connected by a bus 19, as well as a wired transceiver unit 25 and a wireless transceiver unit 26 connected to the communication interface 17.

[0100] The auxiliary storage device 14 is, for example, a hard disk drive (HDD) or a solid state drive (SSD), and is a storage device that stores data related to application software and the like. The wired transceiver 25 includes a transceiver that is capable of communicating using a wired network. Control targets such as a light source 60 are connected to the wired transceiver 25. However, some or all of the control targets may be connected to the bus 19 or to the wireless transceiver 26.

[0101] The wireless transceiver 26 is a transceiver capable of communicating using a wireless network. The wireless network may include a wireless communication network for mobile phones, the Internet, a Virtual Private Network (VPN), a Wide Area Network (WAN), etc. The wireless transceiver 26 may also include a Near Field Communication (NFC) unit, a Bluetooth (registered trademark) communication unit, a Wireless Fidelity (Wi-Fi) transceiver, an infrared transceiver, etc. The control device 100 may communicate with a server (not shown) via the wireless transceiver 26 to acquire various information.

[0102] The control device 100 may be connectable to a recording medium 16. The recording medium 16 stores a predetermined program. The program stored in the recording medium 16 is installed in the auxiliary storage device 14 of the control device 100 via the drive device 15. The installed predetermined program can be executed by the CPU 11 of the control device 100. For example, the recording medium 16 may be a recording medium that records information optically, electrically, or magnetically, such as a CD (Compact Disc)-ROM, a flexible disk, or a magneto-optical disk, or a semiconductor memory that records information electrically, such as a ROM or a flash memory. The recording medium 16 does not include a carrier wave.

[0103] Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes are possible within the scope of the claims. It is also possible to combine all or a plurality of components of the above-described embodiments.

[0104] For example, in the above-described embodiment, the protrusion 43 is formed on the back side portion 3. However, instead of or in addition to this, a protrusion pointing toward the back side portion 3 may be formed on the front side portion 2. Furthermore, the protrusion 43 may be bonded to both the front side portion 2 and the back side portion 3. In this case, the front side portion 2 and the back side portion 3 may be integrally formed with the protrusion 43. [Explanation of symbols]

[0105] 1 Skin treatment device 1A Skin treatment device 2 Front part 3 Back side 4. Band 14 Auxiliary storage 15 Drive device 16 Recording media 17 Communication Interface 19 Bus 25 Wired transmitter / receiver 26 Radio transmitter / receiver 43 Protrusion 430 End face 60 light source 61 Green LED (first output device) 611 LED (large) (first light source, first LED chip) 612 LED (small) (1st light source, 2nd LED chip) 621 Red LED (second output device, second light source) 6211 LED (large) 6212 LED (small) 622 Infrared LED (second output device, second light source) 623 Yellow LED (second output device, second light source) 6231 LED (large) 6232 LED (small) 70 boards 90 power supply 100 control device

Claims

1. a facing portion that faces a predetermined area of ​​the user's skin during use; a plurality of first output devices arranged in the opposing regions and configured to apply an output to the skin in use; the plurality of first output devices are arranged such that, when the maximum value of the output level acting over the predetermined range is 1, the range in which the output level is 0.5 or more accounts for 70% or more of the predetermined range; the plurality of first output devices are composed of a plurality of first light sources that output light having a center wavelength in a wavelength range of 490 nm or more and 525 nm or less; a distance restriction means for restricting a distance between the user's skin and the first output devices so that the first output devices are spaced apart from the user's skin by a predetermined distance or more during use, A skin treatment device, wherein a plurality of the distance control means are arranged over the entire opposing area at positions that avoid the plurality of first output devices in the opposing area.

2. 2. The skin processing device according to claim 1, wherein the plurality of first output devices are arranged such that, when the maximum value of the output level acting over the predetermined range is 1, the range in which the output level is 0.6 or higher accounts for 80% or more of the predetermined range.

3. a facing portion that faces a predetermined area of ​​the user's skin during use; a plurality of first output devices arranged in the opposing regions and configured to apply an output to the skin in use; the plurality of first output devices are arranged so that the outputs act uniformly over the predetermined range; the plurality of first output devices are composed of a plurality of first light sources including a plurality of types of LED (Light Emitting Diode) chips with different outputs or sizes, and outputting light having a center wavelength in a wavelength range of 490 nm or more and 525 nm or less; the plurality of types of LED chips include a first LED chip having a first output or a first size, and a second LED chip having a second output or a second size smaller than the first output or the first size, a distance restriction means for restricting a distance between the user's skin and the first output devices so that the first output devices are spaced apart from the user's skin by a predetermined distance or more during use, A skin treatment device, wherein a plurality of the distance control means are arranged over the entire opposing area at positions that avoid the plurality of first output devices in the opposing area.

4. The skin treatment device according to claim 3 , wherein the second LED chip is disposed between two adjacent first LED chips or within a region surrounded by a plurality of the first LED chips.

5. The maximum power level acting over the predetermined range is 8 mW / cm ２ The skin treatment device according to claim 1 or 3, wherein:

6. The maximum power level acting over the predetermined range is 10 mW / cm ２ The skin treatment device according to claim 5 .

7. The skin treatment device according to claim 1 or 3, wherein the distance regulation means is formed in a columnar shape.

8. The skin processing device according to claim 1 or 3, wherein the facing portions are shaped or deformable so that, during use, the distances between the plurality of first output devices and the user's skin are approximately the same across the predetermined range.

9. The skin treatment device according to claim 1 or 3, wherein the facing portion is in the form of a mask that covers the face or neck of the user during use.

10. further comprising a plurality of second output devices arranged at the opposing locations and configured to apply an output to the skin in use; The skin treatment device according to claim 1 or 3, wherein the plurality of second output devices are composed of a plurality of second light sources that output light having a center wavelength in a wavelength range corresponding to red, infrared, or yellow.

Images