Light irradiation device

Abstract

The utility model provides a light irradiation device which can realize diversification of functions. The light irradiation device is provided with a head having a light emission surface capable of coming into contact with the skin of a human body, the head having an optical system for emitting light to the outside via the light emission surface, the optical system including one or more light sources and one or more filters, and being capable of emitting light from the one or more light sources via the one or more filters. Two or more kinds of light having different characteristics can be irradiated through a common light emission surface.

Description

Technical Field

[0001] The utility model relates to a light irradiation device. Background Art

[0002] There is known a technique that can promote hair removal and promote whitening of hair after hair removal by irradiating the skin with pulses of light given by a light source.

[0003] Prior art literature

[0004] Patent Document 1: Japanese Patent Application Publication No. 2010-246760

[0005] However, in the above-mentioned conventional technology, there is a problem that the functions of the light irradiation device are limited to a small number of functions, and the convenience is low. Utility Model Content

[0006] Therefore, an object of the present invention is to realize the diversification of functions of a light irradiation device.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a light irradiation device, which comprises: a head, which has a light emitting surface that can contact human skin; an optical system, which is arranged on the head and emits light to the outside through the light emitting surface; a sensor, which is arranged on the head and detects the skin condition of the person; and a control device, which controls the optical system based on sensor information from the sensor, and the optical system includes one or more light sources and one or more filters, and based on the light from the one or more light sources, more than two kinds of lights with different characteristics can be irradiated through the one or more filters and through the light emitting surface, and the control device controls the distribution of the output of the two or more lights based on the sensor information.

[0008] The optical system can emit the two or more lights having different characteristics through the common light emitting surface.

[0009] The one or more optical filters are formed by coating the optical system.

[0010] The one or more filters include a first filter and a second filter, wherein the first filter allows light within a first wavelength range that can be expected to have a skin spot reduction effect to pass through, and the second filter allows light within a second wavelength range to pass through, and the light within the second wavelength range is different from the light within the first wavelength range.

[0011] The sensor includes a sensor for detecting color information, and the control device includes: a detection processing unit, which detects conditions related to color spots in the skin area in contact with the head based on sensor information from the sensor; and an output control unit, which controls the output of light in the first wavelength range based on the detection result of the detection processing unit.

[0012] At least one sensor is respectively arranged on both sides of the light emitting surface of the head.

[0013] The output control unit controls the output of the light in the first wavelength range and the output of the light in the second wavelength range based on the color spot density based on the detection result of the detection processing unit.

[0014] When the color spots have a first density, the output control unit increases the output of the light in the first wavelength range and decreases the output of the light in the second wavelength range, compared to when the color spots have a second density thinner than the first density.

[0015] The first optical filter allows light in a wavelength range including a wavelength of 505 nm to pass therethrough, and the second optical filter allows light in a wavelength range including a wavelength of 800 nm to pass therethrough.

[0016] The effects of the utility model are as follows.

[0017] According to the utility model, the functions of the light irradiation device can be diversified. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a perspective view showing a light irradiation device according to a first embodiment of the present invention.

[0019] Figure 2 It is an exploded perspective view showing the head.

[0020] Figure 3 It is an explanatory diagram showing a light source in the form of a xenon tube.

[0021] Figure 4 is a cross-sectional view showing the interior of the head.

[0022] Figure 5 is a schematic diagram showing the path of light from a light source.

[0023] Figure 6 Schematic diagram showing how light from two light sources is irradiated.

[0024] Figure 7 This is a diagram showing the configuration of a control unit of a light irradiation device.

[0025] Figure 8 FIG. 1 is a plan view schematically showing a head portion of a light irradiation device according to a second embodiment.

[0026] Fig. 9 It is an explanatory diagram of the characteristics of light that can be output by the light irradiation device of the second embodiment.

[0027] Fig.9A This is a diagram for explaining the characteristics of light that can be output when using filters according to other embodiments.

[0028] Fig.10 FIG. 1 is a diagram schematically showing the configuration of a control system of a light irradiation device according to the second embodiment.

[0029] Fig.11 This is a flowchart showing an example of the color spot detection process performed by the control unit of the second embodiment.

[0030] Fig.12 is performed using a touch sensor Fig.11 A flowchart of an example of a color spot detection process.

[0031] Fig.13 The flowchart is an example of a light source control process based on the color spot detection result by the intelligent wrinkle sensor.

[0032] Fig.14 This is a diagram for explaining the light source control process based on the color spot detection result.

[0033] In the figure: 1—light irradiation device, 2—holding part, 3—head, 3a—light emitting surface, 6a—glass tube, 6b—metal wire, 6c—electrode, 20—input part, 61—light source (first light source), 62—light source (second light source), 71—optical filter (first filter), 72—optical filter (second filter), 80—reflector, 82—side reflector, 84—back reflector (first reflector, second reflector), 150—control part (control device, output control part, detection processing part). DETAILED DESCRIPTION

[0034] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

[0035] (First embodiment)

[0036] A light irradiation device 1 will be described as a first embodiment. The light irradiation device 1 includes two xenon lamps and two optical filters, and performs light irradiation through a reflector.

[0037] Figure 1: is a stereogram showing a basic light irradiation device 1 of the present invention. The light irradiation device 1 generates light that can be irradiated onto human skin. The light can have beauty-related effects. In this case, the beauty-related effects are optional and can include any combination of one or more of the following: such as hair removal, skin beautification, sagging elimination, firming, fat burning, lifting, face reduction, increasing skin elasticity, increasing skin luster, increasing skin moisture, etc. In addition, the beauty-related effects can be quantifiable effects or non-quantifiable effects.

[0038] in addition, Figure 1 The light irradiation device 1 shown is a portable device that can be held by a user's hand, but can also be applied to a movable device that is movably supported on a fixed device by an arm or the like.

[0039] The light irradiation device 1 includes a grip 2 and a head 3. In this case, the user holds the grip 2 and directs the light emitting surface 3a of the head 3 toward the desired part of the user's face or body, so that the light from the light irradiation device 1 can be locally irradiated to the desired part.

[0040] The grip portion 2 has a form that is easy for the user to hold. The grip portion 2 may include an input portion 20 including various buttons such as a power switch button, a mode switching button, and an intensity adjustment button. It should be noted that the various buttons may be mechanical buttons or touch switches. In addition, the grip portion 2 may be provided with a display portion (not shown) that displays the state of the light irradiation device 1, etc.

[0041] The head 3 is disposed at the end of the grip 2. In addition, the head 3 may be fixed relative to the grip 2, or may be detachable, or may be movable relative to the grip 2.

[0042] The head 3 may have a light emitting surface 3a that is substantially planar (including a curved surface with a large radius of curvature). The shape of the light emitting surface 3a in the front view (the shape when viewed in a direction perpendicular to the light emitting surface 3a) may be any shape such as a rectangle, a circle, an ellipse, a polygon, etc. The light emitting surface 3a may be formed of any light-transmissive material such as glass. In addition, the light emitting surface 3a may also be in the form of a lens.

[0043] Figure 2 It is an exploded perspective view of the head 3. Figure 3 It is an explanatory diagram of a xenon tube-type light source 61 (the same applies to the light source 62 ), with a front view schematically shown on the left side and a cross-sectional view (a cross-sectional view along the left side line AA) schematically shown on the right side. Figure 4 It is a cross-sectional view showing the interior of the head 3 . Figure 5It is a diagram schematically showing the path of light from the light source 61, with the left side representing the path of direct light, the center representing the path of indirect light (light reflected by the reflector 80 and reaching the light exit surface 3a), and the right side using the shaded area R51 schematically representing the entire path (distribution) of light obtained by adding the above lights. Figure 6 The irradiation pattern of the light from the two light sources 61 and 62 is schematically shown, and the entire paths of the light from the two light sources 61 and 62 are schematically overlapped and shown in hatched areas R51 and R52 .

[0044] exist Figure 2 In the figure, three mutually orthogonal directions are defined as X direction, Y direction and Z direction. In the following description, the side close to the light emitting surface 3a in the Z direction is called the "front side", and the side far from the light emitting surface 3a in the Z direction is called the "back side".

[0045] like Figure 2 As shown, the head 3 has an optical system in the housing 30 . The optical system includes two light sources 61 , 62 , two filters 71 , 72 (there may also be a case where there is one filter) and a reflector 80 .

[0046] The light sources 61 and 62 may be any light source such as LED (Light Emitting Diode), halogen lamp, etc., but in this embodiment, they are xenon tubes that emit light by discharge. Figure 3 As shown, the light source 61 (the same is true for the light source 62) has electrodes 6c at both ends of a cylindrical glass tube encapsulating xenon gas. By applying a high current to a metal wire 6b disposed on the outer peripheral surface of the glass tube 6a, the xenon gas ions are charged, and when a high voltage is applied to the inside through the electrode 6c, the charged xenon gas ions are continuously discharged and emit light instantaneously. The emitted light is as shown in FIG. Figure 3 As indicated by arrows R3 in the right side cross-sectional view, the wires are output radially. In addition, instead of or in addition to the metal wires 6b, a glass surface coated with a conductive material (eg, formed by surface treatment) may be used.

[0047] The light sources 61 and 62 are arranged side by side in the Y direction, and their respective positions in the X direction and the Z direction are the same. At this time, the light sources 61 and 62 are arranged with the central axis of the glass tube along the Y direction. In addition, in a modified example, the positions of the light sources 61 and 62 in the Y direction and the Z direction are the same, and they can be arranged side by side in the X direction. The arrangement of the light sources 61 and 62 is arbitrary.

[0048] The light sources 61 and 62 may have the same structure except for the different configurations. That is, the light sources 61 and 62 may be products of the same product number. In addition, different products may be used according to the characteristics of the products, which is optional.

[0049] The filters 71 and 72 are arranged between the light sources 61 and 62 and the light exit surface 3a. The filter 71 is arranged in association with the light source 61, and the filter 72 is arranged in association with the light source 62. Specifically, the filters 71 and 72 are arranged side by side in the Y direction, and the respective positions in the X direction and the Z direction are the same as each other. At this time, the filter 71 faces (corresponds to) the light source 61 in the Z direction, and the filter 72 faces (corresponds to) the light source 62 in the Z direction.

[0050] The reflector 80 reflects the light from the light sources 61 and 62 and guides it to the light exit surface 3 a. The reflector 80 includes a side reflector 82 and a back reflector 84.

[0051] The side reflector 82 is disposed between the filters 71, 72 (there may be a case where there is one filter) and the light emitting surface 3a in the Z direction. The side reflector 82 may be a cylindrical shape having a rectangular cross section in the Z direction. The back reflector 84 extends to the back side of the filters 71 and 72 in the Z direction. The back reflector 84 is disposed to be opposite to the back side of the light sources 61, 62 in the Z direction, and to be opposite to both sides of the light sources 61, 62 in the Y direction. For example, the back reflector 84 may be in an arc shape along the cross-sectional shape of the light sources 61, 62 as viewed from the X direction, and the open side may abut against the filters 71, 72 (there may be a case where there is one filter) in the Z direction. In addition, the back reflector 84 may be disposed close to the back side of the light sources 61, 62 in a manner in contact with the metal wire 6b of the light sources 61, 62.

[0052] like Figure 5 As schematically shown in FIG. 1 , the reflector 80 is configured so that the light from the light source 61 is uniformly emitted from the light exit surface 3a as a whole through the optical filter 71. Similarly, the reflector 80 is configured so that the light from the light source 62 is uniformly emitted from the light exit surface 3a as a whole through the optical filter 72. In this case, Figure 6 As schematically shown in FIG. 1 , the light from the light source 61 and the light from the light source 62 can be used together on the entire light exit surface 3 a. There is also a case where there is one filter.

[0053] Next, refer to Figure 7 , a control system of the light irradiation device 1 of the first embodiment is described.

[0054] Figure 7 1 is a conceptual block diagram of a control system of the light irradiation device 1 according to the first embodiment.

[0055] like Figure 7 As shown, the light irradiation device 1 includes: the above-mentioned input section 20; and a control section 150 electrically connected to the light sources 61 and 62. The control section 150 may include a computer (eg, a microcomputer) and a driving circuit.

[0056] The control section 150 controls the light sources 61, 62, etc. of the light irradiation device 1, for example, by executing a computer program stored in a built-in storage device or an accessible external storage device. In addition, the processing performed by the light irradiation device 1 can be realized by additionally or alternatively using a hardware circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA.

[0057] In a first embodiment, a skin treatment device is provided that controls a plurality of light sources so as to emit light of different wavelengths.

[0058] (Second embodiment)

[0059] Next, the second embodiment will be described. With respect to the second embodiment, for the same components as those of the first embodiment described above, the same reference numerals may be used and the description thereof may be omitted.

[0060] Figure 8 1 is a plan view schematically showing a head portion 3A of a light irradiation device 1A according to the second embodiment.

[0061] The head 3A of the second embodiment is added with an intelligent color spot sensor 114 for detecting color spots on the basis of the head 3 of the first embodiment. In addition, in the modified example, the intelligent color spot sensor 114 can be used not only to detect color spots, but also to detect other skin conditions, such as red spots, dullness, skin brightness, skin color, etc.

[0062] The smart color spot sensor 114 may be disposed outside the light exit surface 3a. That is, the smart color spot sensor 114 should be placed at a position that does not block the light emitted from the light exit surface 3a and may be close to the light exit surface 3a.

[0063] In the second embodiment, the smart color spot sensor 114 includes two skin color sensors 1141. The two skin color sensors 1141 are respectively arranged on both sides of the light exit surface 3a in a manner of clamping the light exit surface 3a in the short side direction of the head 3A. In addition, in general, the short hand method of the head 3A corresponds to the moving direction of the light irradiation device 1A when the user presses the head 3A on the skin. In addition, in a modified example, the smart color spot sensor 114 may include only one skin color sensor 1141, or include three or more skin color sensors 1141.

[0064] The skin color sensor 1141 may be an image sensor for detecting skin color. In other words, the skin color sensor 1141 may be a color sensor for generating color information within a photographing range.

[0065] A specific example of the color spot detection method of the intelligent color spot sensor 114 will be described in detail later.

[0066] The optical filter 71 allows light in a wavelength range including a wavelength of 505 nm and a width of 200 nm to pass through, preferably allows light in a wavelength range including a wavelength of 505 nm and a width of 150 nm to pass through. The optical filter 72 allows light in a wavelength range including a wavelength of 830 nm and a width of 560 nm to pass through, preferably allows light in a wavelength range including a wavelength of 830 nm and a width of 400 nm to pass through.

[0067] In the present embodiment, the optical filters 71 and 72 have the following characteristics: that is, the optical filter 71 is a bandpass filter that substantially allows only light in the wavelength range of 500 nm to 650 nm (an example of the first wavelength range) to pass through, and the optical filter 72 is a bandpass filter that substantially allows only light in the wavelength range of 640 nm to 1200 nm (an example of the second wavelength range) to pass through. In the present embodiment, the optical filters 71 and 72 can both be filters that pass light in the range of 640 nm to 650 nm, but such an overlapping range can be eliminated, or a relatively narrow range (such as the 10 nm range shown in the present embodiment) can be retained.

[0068] In addition, the optical filters 71 and 72 may be in the form of glass filters. In this case, the glass filters may be made of mixed color glass, or the filter films may be formed by evaporation.

[0069] In addition, in the present embodiment, the optical filters 71 and 72 are provided separately from the light sources 61 and 62, but the optical filters 71 and 72 may also be provided integrally with the light sources 61 and 62. For example, the filter films associated with the optical filters 71 and 72 may be formed by coating on a xenon lamp tube. In this case, a coating that produces the above-mentioned characteristics should be selected. In addition, as a form of coating, the filter films associated with the optical filters 71 and 72 may also be formed by evaporating the xenon lamp tube. In this case, the glass filter components may be omitted, thereby reducing the number of components and simplifying assembly. In addition, coating by evaporation material and evaporation pressure may not completely block ultraviolet light, so in this case, a high-pass sintered glass filter may be additionally added to block ultraviolet light.

[0070] In addition, other embodiments of the optical filters 71 and 72 can be implemented by combining the following (1) to (4):

[0071] (1) A combination of a glass filter (optical filter 71) that transmits light of 500 nm to 650 nm and a high-pass glass filter (optical filter 72) that transmits light of 640 nm to 1200 nm.

[0072] (2) A combination of a filter coated with a material that transmits light of 500 nm to 650 nm (optical filter 71) and a high-pass glass filter that transmits light of 640 nm to 1200 nm (optical filter 72).

[0073] (3) A combination of a filter coated with a material that transmits light of 500 nm to 650 nm (optical filter 71) and a filter coated with a material that transmits light of 640 nm to 1200 nm (optical filter 72).

[0074] (4) A combination of a filter coated with a material that transmits wavelengths from 500nm to 650nm (optical filter 71), a filter coated with a material that transmits wavelengths from 640nm to 1200nm (optical filter 72), and a high-pass glass filter that transmits wavelengths from 640nm to 1200nm.

[0075] In addition, the light sources 61 and 62 are not limited to IPL (Intense Pulse Light), but may be LED (Light Emitting Diode), laser, halogen lamp, or the like.

[0076] Fig. 9 This is an explanatory diagram for explaining the characteristics of light that can be output by the light irradiation device 1A of this embodiment.

[0077] Fig. 9 , with wavelength as the horizontal axis and output (intensity) as the vertical axis, two different light characteristics C91 and C92 are shown. The characteristic C91 represents the characteristic of the light emitted through the optical filter 71, and the characteristic C92 represents the characteristic of the light emitted through the optical filter 72.

[0078] According to this embodiment, Fig. 9 As shown, two kinds of light with different characteristics can be emitted through the common light emitting surface 3a. Accordingly, compared with the comparative example in which two separate light emitting surfaces each emit light with different characteristics, a more efficient structure can be achieved. That is, there is no need to set up a space for two separate light emitting surfaces, and the miniaturization of the head 3A can be achieved. In addition, if it is desired to irradiate the two kinds of light on the same skin part at the same time, it is only necessary to contact the light emitting surface 3a to the part. In the comparative example, different light emitting surfaces need to be contacted to the parts respectively. In comparison, in the present embodiment, by sharing the light emitting surface 3a, a plurality of lights with different characteristics can be irradiated to the same part at the same time without moving the light irradiation device 1A. Therefore, not only can the miniaturization of the light irradiation device 1A be achieved, but also the operating efficiency (treatment efficiency) of the user operating the light irradiation device 1A can be improved.

[0079] In addition, although two filters (optical filters 71, 72) are used in this embodiment, a single filter may be used to achieve the same function. Fig.9AThe filter (dual-bandpass filter) with the filtering characteristics shown. When using a filter with such characteristics, it is possible to combine and irradiate light with different characteristics on the entire light emitting surface 3a. In addition, by adjusting (controlling) the number and output of the light sources, the irradiation intensity can also be adjusted to suit the skin.

[0080] Here, when light with characteristic C91 is irradiated on the skin, it can be expected to improve skin spots and dullness. In addition, when light with characteristic C92 is irradiated on the skin, it can be expected to improve complex skin. In addition, since it includes red wavelengths, it can act deeply and have an anti-aging effect.

[0081] In addition, when light with characteristic C91 and light with characteristic C92 act on the skin at the same time, the skin can be better kept moisturized than when only one of the lights is acted on, which has been proved in the experiment of the present application. In this case, the following three cases were compared: that is, case 1 is to act on the skin with a predetermined output only with light with characteristic C91; case 2 is to act on the skin with a predetermined output only with light with characteristic C92; case 3 is to set the output ratio of light with characteristic C91 and light with characteristic C92 to 3:2, and the sum of the outputs of the two is the predetermined output, and act on the skin at the same time. In this case, the effect of case 3 (the effect on skin moisturization) is more significant than that of case 1 or case 2. It can be seen from this that the usefulness of the light irradiation device 1A that simultaneously acts on the skin with light with characteristic C91 and light with characteristic C92 through the common light exit surface 3a is useful.

[0082] Hereinafter, the output of light having the characteristic C91 is referred to as “color spot filter output”, and the output of light having the characteristic C92 is referred to as “skin beautification filter output”.

[0083] In addition, in a modified example, as the optical filter 71, any bandpass filter that can transmit light of a wavelength of 505 nm, for example, a bandpass filter that can transmit light of a wavelength range of 490 nm to 525 nm, a bandpass filter that can transmit light of a wavelength range of 500 nm to 550 nm, and a bandpass filter that can transmit light of a wavelength range of 500 nm to 650 nm can be used. In addition, as the optical filter 72, any bandpass filter that can transmit light of a wavelength of 800 nm can be used, for example, a bandpass filter that can transmit light of a wavelength range of 800 nm to 1200 nm.

[0084] Next, refer to Fig.10 In the following, the control system of the light irradiation device 1A according to the present embodiment will be described.

[0085] Fig.10 Schematically shows the structure of the control system of the light irradiation device 1 of this embodiment.

[0086] like Fig.10 As shown, the light irradiation device 1A is relative to the reference Figure 7 The light irradiation device 1 described in the embodiment of the present invention is different in that an intelligent spot sensor 114 and a touch sensor 116 are added.

[0087] In the present embodiment, the control unit 150 implements a color spot detection function for detecting color spots based on sensor information from the intelligent color spot sensor 114 , and implements a light source control function for controlling the light sources 61 and 62 based on the color spot detection result.

[0088] The control unit 150 has a predetermined storage area 160 in a built-in storage device or an accessible external storage device. The function of the predetermined storage area 160 will be described later.

[0089] Fig.11 is an exemplary flowchart showing the manner in which the control unit 150 performs the color spot detection process.

[0090] In step S01, it is determined whether there is a white reference value stored in the predetermined storage area 160. If there is a white reference value stored in the predetermined storage area 160, the processing proceeds to step S03; if there is no white reference value stored in the predetermined storage area 160 (i.e., it is in the initialized state), the processing proceeds to step S05.

[0091] In step S03, a skin color data reading process is performed to read the sensor information of the intelligent color spot sensor 114. In step S05, a white reference value of the skin color data is stored in a predetermined storage area 160, and the process ends. In this case, the stored white reference value may be a predetermined initial value.

[0092] Next, in step S07, it is determined whether the skin color at the detection position is black or less than brown based on the read skin color data. If it is black or less than brown, the processing proceeds to step S11; if not, the processing proceeds to step S09.

[0093] In step S11, the color spot detection state is set or maintained at "2", and the processing ends.

[0094] In step S09, it is determined whether the read skin data is a value whiter than the stored value of the white reference value in the predetermined storage area 160. If the skin color data is a value whiter than the stored value of the white reference value, the processing proceeds to step S13; if the skin color data is not a value whiter than the stored value of the white reference value, the processing proceeds to step S15.

[0095] In step S13, the color spot detection state is set or maintained to "0", and the storage value of the white reference value in the predetermined storage area 160 is updated to the current whiter value (with the detected brighter skin color part in addition). Even if calibration is performed, the basic skin color and the depth of color spots (color spots) of different people will be different. Therefore, in order to realize an automatic method without prior calibration, no matter from which angle the detection is made, each time white is detected, the target predetermined storage area 160 is updated. According to this, the individual difference (difference that varies from person to person) of the color spot detection reference value can be eliminated, and the accuracy of color spot detection can be improved. Then, the processing ends.

[0096] In step S15, if the stored value of the white reference value of the storage area 160 is darker than the predetermined threshold value, and if it is black, it is identified as color spots (color spots). The predetermined threshold value is arbitrary, but can be a variable value reflecting individual differences. In this case, the color spot detection state is set or maintained to "1". Then, the process ends.

[0097] Fig.12 is a flow chart showing the use of the touch sensor 116 to perform Fig.11 The touch sensor 116 may be provided on the head 3A. The touch sensor 116 sends different electrical signals depending on whether the head 3A contacts the skin.

[0098] First, in step S02, it is determined whether the light irradiation device 1A is in contact with the skin based on sensor information from the touch sensor 116. If contact with the skin is detected, the process proceeds to step S04; if not, the process proceeds to step S06.

[0099] In step S04, execute Fig.11 In step S06, the storage value of the white reference value in the predetermined storage area 160 is initialized. By performing such initialization, inconvenience can be avoided. That is, if white (complete white) is detected once, if initialization is not performed afterwards, the situation where any color may be erroneously detected as color spots will continue, so in order to avoid such a state, initialization is performed.

[0100] This spot detection function can determine spots, moles, etc., and can also detect spots that match individual skin color differences.

[0101] Fig.13 2 is a flowchart showing an example of the light source control process (the light source control process of the control section 150 ) based on the color spot detection result of the intelligent color spot sensor 114 .

[0102] In step S20, it is determined whether the spot detection state is "2". If the spot detection state is "2", the light sources 61 and 62 are not emitted or are weakly emitted (S22). Specifically, strong irradiation is not performed on skin that is not in contact with the skin or black skin with a color higher than brown.

[0103] If the color spot detection state is not "2", it is determined whether the color spot detection state is "0" (S24). If the color spot detection state is "0", the skin beauty filter output (the output of the light with a wavelength of 640nm to 1200nm mediated by the optical filter 72) is enhanced compared to the color spot filter output (the output of the light with a wavelength of 500nm to 650nm mediated by the optical filter 71) (S26). In this case, if the skin beauty filter output is set to "100", the color spot filter output should be less than "100", preferably less than "50".

[0104] When the spot detection state is not "0" (i.e., when the spot detection state is "1"), the spot filter output (the output of light with a wavelength of 500nm to 650nm mediated by the optical filter 71) is enhanced compared to the skin beautification filter output (the output of light with a wavelength of 640nm to 1200nm mediated by the optical filter 72) (optical (S28). In this case, assuming that the spot filter output is set to "100", the skin beautification filter output is less than "100", preferably less than "50".

[0105] Thus, according to the present embodiment, light having characteristics corresponding to the detection result of color spots on the skin area to which the light exit surface 3a is applied can be irradiated to the skin area. That is, by increasing the color spot filter output in the area where the color spots are detected, the effect of the color spot filter output can be maximized. On the other hand, by increasing the beautification filter output in the area where the color spots are not detected, the effect of the beautification filter output can be maximized.

[0106] In addition, Fig.12 In the example shown, the color spot filter output is enhanced in the color spot detection state, but the color spot filter output can vary according to the concentration of the color spot. That is, the darker the color spot, the stronger the color spot filter output can be. In this case, depending on the situation, the darker the color spot, the skin beautification filter output can be weakened.

[0107] For example, Fig.14As shown, for the part with lighter spots (light spots), the spot filter output and the skin-beautifying filter output can be set to a normal value (reference output), while for the part with darker spots (dark spots), the spot filter output can be increased relative to the normal value, and on the other hand, for the part without spots, the skin-beautifying filter output can be increased relative to the normal value. In this case, the sum of the outputs of the two (i.e., the total output of the two light sources 61, 62) can be fixed or variable.

[0108] Alternatively, the following control can be achieved: for the part with darker spots, the light with a wavelength of 500nm to 650nm can be increased from the normal value, and for the part with lighter spots, the light with a wavelength of 640nm to 1200nm can be increased from the normal value. In addition, as a spot mode (a suitable mode for a locally obvious spot area), the light with a wavelength of 500nm to 650nm can be increased from the normal value. In addition, for the part with obvious erythema, the light with a wavelength of 500nm to 650nm can also be increased from the normal value. In addition, in the skin beauty mode, the light with a wavelength of 500nm to 650nm can also be increased from the normal value. In addition, for the part with obvious pores, the light with a wavelength of 640nm to 1200nm can be increased from the normal value. In these cases, the state of each part (such as the state of spots, erythema, etc.) can be visually detected by the user and the mode can be switched by manual operation, and / or, it can also be automatically realized based on various sensor information including the intelligent spot sensor 114.

[0109] Here, if the color spot filter output and the skin beautification filter output are enhanced at the same time, skin problems or conditions may be aggravated. According to this embodiment, such inconvenience (i.e., the inconvenience when both outputs are maximized at the same time) can be prevented by adjusting the distribution of the two filter outputs and outputting them.

[0110] In addition, in this embodiment, as described above, the skin color sensors 1141 are arranged on both sides of the light emitting surface 3a. Therefore, no matter which direction the user moves the light irradiation device 1A (see Figure 8 The color spot detection function can be maintained by at least one skin color sensor 1141. In addition, the number of skin color sensors 1141 is not limited to two, and three or more (for example, four) can be configured. In addition, when multiple skin color sensors 1141 are configured, skin color data showing a darker color can be used preferentially from the respective skin data.

[0111] In addition, in this embodiment, the irradiation method of the color spot filter output and the skin beauty filter output is arbitrary, for example, split irradiation can be used. That is, instead of releasing the accumulated electrical energy at one time for irradiation, in order to reduce damage to the skin, the irradiation can be controlled to be less than 10ms and divided. However, the control of the irradiation division will cause the output to gradually weaken when a specific division is performed, so it can be divided according to a uniform intensity and the irradiation control is performed so that the output does not weaken. In addition, when the color spot filter output is enhanced, the irradiation time and / or irradiation frequency of the light related to the color spot filter can be increased.

[0112] Although various embodiments are described in detail above, the present invention is not limited to specific embodiments, and various modifications and variations can be made within the scope of the patent claims. In addition, all or multiple constituent elements of the aforementioned embodiments can be combined.

[0113] In the above embodiments, for multiple light sources capable of emitting light with different characteristics, the control method is arbitrary. For example, the optimal output adjustment can be achieved by controlling the output, illumination intensity, emission timing, number of times, interval, etc. of each light source.

[0114] In addition, the optical filter 71 and / or the optical filter 72 can be implemented in the form of being attached to a material such as sapphire glass with a high cooling effect. In addition, the light emitting surface 3a can also be made of sapphire glass to achieve the skin cooling effect of sapphire glass. In addition, in addition to or instead of sapphire glass, a Peltier element can be used or replaced to cool the skin. In this case, the Peltier element can also be used to cool the light sources 61 and 62. In addition, a Peltier element (not shown) or a metal with a built-in Peltier element can be provided around the head 3A of the light emitting surface 3a.

[0115] In addition, the optical filter 71 and / or the optical filter 72 of a specific wavelength tends to heat up, especially when performing 4.0 J / cm 2 、6.0J / cm 2 When the irradiation intensity is high, the cooling of the skin will significantly affect the user's feeling of use. From this perspective, it is preferred to use materials with high cooling effect such as sapphire glass. When the thickness of the cooling component constituting the light emitting surface 3a is about 3mm, it may be difficult to maintain a cool feeling when it contacts the skin; if it is too thick (for example, more than 13mm), the cost is too high. Therefore, the ideal value of the thickness is 5mm to 12mm.

[0116] Furthermore, in the above-mentioned embodiment, the light sources are not limited to two, and the light from one light source may be separated and incident on the optical filters 71 and 72. Alternatively, more than three light sources may be configured, and preferably, the filters or light source coatings or irradiation portion surface treatments are configured accordingly in a manner that emits light of multiple wavelengths. Furthermore, the power supply and the capacitor may be housed in the main body, and the light irradiation portion may be designed as a detector, which can cope with multiple light sources or outputs with a high output range, and can more cope with outputs suitable for the irradiation portion. In this case, by housing all components except the minimum components such as a cooling structure for cooling the heat generated by the light source and sensor of the light irradiation portion in the main body, the detector can be made lightweight, thereby improving the lightweight of the detector and improving operability.

[0117] In addition, in the above embodiment, the optical filter 71 and / or the optical filter 72 are not limited to two, and three or more optical filters may be configured to emit light of multiple wavelengths. In order to prevent multiple optical filters from falling from the side of the reflector, a support portion is provided between the optical filters in the Y direction in the side reflector 82 to support the optical filter. The side reflector 82 and the back reflector 84 may be integrated, which can reduce the number of components and the assembly time.

[0118] In addition, in the above-mentioned embodiment, although two kinds of light with different characteristics are emitted through the common light emitting surface 3a, two kinds of light with different characteristics may be emitted from different light emitting surfaces. In addition, the respective emitting surfaces emitting two kinds of light with different characteristics may partially overlap. In addition, by adjusting the depth of the arc-shaped portion of the cross-sectional shape of the light sources 61 and 62 along the reflector 80, the positional relationship between the reflector shape and the light sources 61 and 62, etc., the overlap degree of light (area size, position, shape, etc. of the overlapping emitting surfaces) can be arbitrarily adjusted.

[0119] In addition, in the above-mentioned embodiment, there is an open gap between the light exit surface 3a and the optical filters 71 and 72, but a light guide or the like may also be provided. When there is an open gap, the open gap may be a closed space or a space communicating with the outside (i.e., a non-sealed space). It is preferred that there is a light guide or a space at an appropriate distance because two lights of different characteristics can overlap appropriately.

Claims

1. A light irradiation device, characterized in that: have: A head having a light emitting surface that can contact human skin; An optical system, which is disposed on the head and emits light to the outside through the light emitting surface; A sensor, which is disposed on the head and detects a skin condition of a person; as well as a control device for controlling the optical system based on sensor information from the sensor, The optical system includes one or more light sources and one or more filters, and based on the light from the one or more light sources, two or more lights with different characteristics can be irradiated through the one or more filters and through the light exit surface, The control device controls distribution of outputs of the two or more types of light based on the sensor information.

2. The light irradiation device according to claim 1, characterized in that The optical system can emit the two or more lights having different characteristics through the common light emitting surface.

3. The light irradiation device according to claim 1 or 2, characterized in that: The one or more optical filters are formed by coating the optical system.

4. The light irradiation device according to claim 1 or 2, characterized in that: The one or more filters include a first filter and a second filter, The first filter allows light within a first wavelength range that can be expected to have a skin spot reduction effect to pass through. The second filter allows light of a second wavelength range to pass, the second wavelength range being different from the first wavelength range.

5. The light irradiation device according to claim 4, characterized in that The sensor includes a sensor for detecting color information, The control device comprises: a detection processing unit that detects a condition related to a color spot in a skin area in contact with the head based on sensor information from the sensor; as well as An output control unit controls the output of the light in the first wavelength range based on the detection result of the detection processing unit.

6. The light irradiation device according to claim 5, characterized in that At least one sensor is respectively arranged on both sides of the light emitting surface of the head.

7. The light irradiation device according to claim 5, characterized in that The output control unit controls the output of the light in the first wavelength range and the output of the light in the second wavelength range based on the color spot density based on the detection result of the detection processing unit.

8. The light irradiation device according to claim 5, characterized in that When the color spots have a first density, the output control unit increases the output of the light in the first wavelength range and decreases the output of the light in the second wavelength range, compared to when the color spots have a second density thinner than the first density.

9. The light irradiation device according to claim 8, characterized in that The first filter allows light in a wavelength range including a wavelength of 505 nm to pass through, The second filter allows light of a wavelength range including a wavelength of 800 nm to pass therethrough.

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