Skin beauty device and its control method

Abstract

To provide skin beauty equipment capable of exhibiting a beauty effect that matches skin colors of individual users by setting reference values of the skin colors differently according to the users.SOLUTION: Skin beauty equipment includes: a body that can be gripped by a user; a plurality of light sources 20 capable of emitting lights having mutually different wavelengths; a skin color measuring part 30 that can measure a skin color of the user; and a control part capable of controlling at least one of the intensity and irradiation intervals of the light of two different wavelength bands emitted from the plurality of light sources according to the skin color measured by the skin color measuring part. The control part sets a value measured by the skin color measuring part for the Nth time as a reference value, sets a value measured by the skin color measuring part for the Nth time onwards as a measurement value, and controls at least one of wavelengths, intensity, and irradiation intervals of the light of two different wavelength bands emitted from the plurality of light sources according to a rate of change of the reference value and the measurement value.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a skin beauty device and a control method thereof.

Background Art

[0002] Recently, people's interest in beauty has been increasing, and there has been an increasing interest not only in cosmetics but also in skin beauty devices that can improve the skin condition.

[0003] Most conventional skin beauty devices have a problem that it is difficult for individual users to change their skin color to a desired skin color by operating the skin beauty device by applying a uniform reference value regardless of the skin color of individual users.

[0004] In addition, most conventional IPL (Intense Pulsed Light) skin beauty devices have a problem that it is difficult to realize an optimal wavelength band for reducing skin melanin because energy is generated irregularly due to the use of a flash lamp. In addition, conventional IPL skin beauty devices also have a drawback that periodic lamp replacement is required.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Embodiments of the present invention have been proposed to solve the above problems, and by setting different reference values for skin color according to users, a skin beauty device that can show a beauty effect matching the skin color of individual users is to be provided.

[0007] It is intended to provide a skin beauty device that can control the light irradiated from a light source at a specific wavelength, period (pulse), and intensity based on the skin color of a user so as to be able to change it to the skin color desired by the user.

Means for Solving the Problems

[0008] According to an embodiment of the present invention, there is provided a skin beauty device including a main body that can be held by a user, a plurality of light sources that can irradiate light of different wavelengths, a skin color measurement unit that can measure the skin color of the user, and a control unit that can control at least one of the intensity and irradiation interval of light in two different wavelength bands irradiated from the plurality of light sources according to the skin color measured by the skin color measurement unit. The control unit sets the value measured by the skin color measurement unit for the Nth time as a reference value, sets the value measured by the skin color measurement unit after the Nth time as a measurement value, and can control at least one of the wavelength, intensity, and irradiation interval of light in two different wavelength bands irradiated from the plurality of light sources according to the change rate between the reference value and the measurement value.

[0009] Further, the control unit controls the light source so that the light in the wavelength band of 520 nm to 530 nm and the light in the wavelength band of 585 nm to 592 nm are irradiated simultaneously for a certain period of time and not irradiated simultaneously for a certain period of time, and the period is repeated a predetermined number of times. According to the change rate between the reference value and the measurement value, a skin beauty device can be provided that can control the period in which the light in the wavelength band of 520 nm to 530 nm and the light in the wavelength band of 585 nm to 592 nm are applied to the skin to be different.

[0010] Further, when the change rate between the reference value and the measured value is smaller than a predetermined range, the control unit controls the light source to operate in a first mode in which light in a wavelength band of 520 nm to 530 nm and light in a wavelength band of 585 nm to 592 nm are simultaneously irradiated for 100 ms to 400 ms, and no light is irradiated for 300 ms to 500 ms, and this cycle is repeated a predetermined number of times. When the change rate between the reference value and the measured value is within the predetermined range, the control unit controls the light source to operate in a second mode in which light in a wavelength band of 520 nm to 530 nm and light in a wavelength band of 585 nm to 592 nm are simultaneously irradiated for 400 ms to 700 ms, and simultaneously disappear for 300 ms to 500 ms, and this cycle is repeated a predetermined number of times. When the change rate between the reference value and the measured value is larger than the predetermined range, the control unit controls the light source to operate in a third mode in which light in a wavelength band of 520 nm to 530 nm and light in a wavelength band of 585 nm to 592 nm are simultaneously irradiated for 700 ms to 1000 ms, and simultaneously disappear for 300 ms to 500 ms, and this cycle is repeated a predetermined number of times. A skin beauty device can be provided.

[0011] Further, when the change rate is less than 15%, the control unit controls the light source to operate in the first mode. When the change rate is 15% to 30%, the control unit controls the light source to operate in the second mode. When the change rate exceeds 30%, the control unit can control the light source to operate in the third mode. A skin beauty device can be provided.

[0012] Further, the predetermined number of times can be set to 15 to 25 times. A skin beauty device can be provided.

[0013] Further, a second contact sensor is provided on one side surface of the main body, and the control unit controls the skin color measurement unit to operate only when the second contact sensor comes into contact with the skin. A skin beauty device can be provided.

[0014] In addition, the light source includes a first light source capable of irradiating light in a first wavelength band and a second light source capable of irradiating light in a second wavelength band, and the first wavelength band and the second wavelength band have different wavelength bands from each other, so that a skin beauty device can be provided.

[0015] In addition, the first wavelength band may indicate a wavelength band of 520 nm to 530 nm, and the second wavelength band may indicate a wavelength band of 585 nm to 592 nm, so that a skin beauty device can be provided.

[0016] In addition, the light source further includes a plurality of third light sources capable of irradiating white light, and the skin color measurement unit is arranged between the plurality of third light sources, so that a skin beauty device can be provided.

[0017] In addition, the first light source and the second light source may be arranged alternately, so that a skin beauty device can be provided.

[0018] In addition, the light source and the skin color measurement unit are mounted on a first substrate, and a transmission window through which light irradiated from the light source can be transmitted is arranged on the front surface of the first substrate, so that a skin beauty device can be provided.

[0019] In addition, the light source includes a first light source capable of irradiating light in a first wavelength band, a second light source capable of irradiating light in a second wavelength band, and a third light source capable of irradiating white light, and the transmission window is provided such that the light transmittance of the portion arranged on the front surface of the skin color measurement unit is larger than the light transmittance of the portion arranged on the front surfaces of the first light source and the second light source, so that a skin beauty device can be provided.

[0020] In addition, the transmission window includes a first transmission window arranged on the front surfaces of the skin color measurement unit and the third light source, and a second transmission window arranged on the front surfaces of the first light source and the second light source, and the first transmission window is provided with a larger light transmittance than the second transmission window, so that a skin beauty device can be provided.

[0021] In addition, the transmission window may include a prism sheet capable of focusing the light irradiated from the light source or may be composed of a convex lens, so that a skin beauty device can be provided.

[0022] In addition, a skin beauty device in which the skin color measurement unit is an RGB sensor can be provided.

[0023] In addition, the skin beauty device can be provided, further including a vibration unit that can indicate a plurality of mode states controlled by the control unit by vibration, and a first contact sensor provided on one side of the main body that can sense contact with the skin.

[0024] In addition, the main body can include a housing provided with a first opening S1 where a user can grip and where a first substrate on which the light source is mounted can be located, and a housing head located at one end of the housing and provided with a second opening S2 through which light irradiated from the light source can pass. A skin beauty device can be provided.

[0025] In addition, the first substrate on which the light source is mounted is housed inside the housing so that light irradiated from the light source can be prevented from leaking from the side surface of the housing, and an end portion of the housing protrudes more than the light source. A skin beauty device can be provided.

[0026] According to another embodiment of the present invention, there can be provided a control method for a skin beauty device, including a step (S20) of measuring skin color by a skin color measurement unit and setting a reference value, a step (S30) of measuring skin color by the skin color measurement unit and setting a measured value, a step (S40) of calculating a change rate between the reference value and the measured value by a control unit, and a step (S50) of controlling at least one of the wavelength, intensity, and irradiation interval of light irradiated from a light source based on the change rate calculated by the control unit, and irradiating the skin with light in at least two wavelength bands.

[0027] Further, when the change rate between the reference value and the measured value is smaller than a predetermined range, the control unit controls the light source to operate in a first mode in which light in a wavelength band of 520 nm to 530 nm and light in a wavelength band of 585 nm to 592 nm are simultaneously irradiated for 100 ms to 400 ms, and no light is irradiated for 300 ms to 500 ms, and this cycle is repeated a predetermined number of times. When the change rate between the reference value and the measured value is within the predetermined range, the control unit controls the light source to operate in a second mode in which light in a wavelength band of 520 nm to 530 nm and light in a wavelength band of 585 nm to 592 nm are simultaneously irradiated for 400 ms to 700 ms, and simultaneously disappear for 300 ms to 500 ms, and this cycle is repeated a predetermined number of times. When the change rate between the reference value and the measured value is larger than the predetermined range, the control unit controls the light source to operate in a third mode in which light in a wavelength band of 520 nm to 530 nm and light in a wavelength band of 585 nm to 592 nm are simultaneously irradiated for 700 ms to 1000 ms, and simultaneously disappear for 300 ms to 500 ms, and this cycle is repeated a predetermined number of times. A control method for a skin beauty device can be provided.

Advantages of the Invention

[0028] The skin beauty device according to an embodiment of the present invention can show a beauty effect that matches the skin color of each user by setting a reference value of the skin color differently according to the user.

[0029] In addition, based on the skin color of the user, by controlling the light irradiated from the light source at a specific wavelength, period (pulse), and intensity, there is an advantage that the skin color can be changed to the skin color desired by the user.

Brief Description of the Drawings

[0030]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. In the description of the present invention, when it is determined that a specific description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

[0032] FIG. 1 shows a perspective view of a skin beauty device 1 according to an embodiment of the present invention, FIG. 2 shows an exploded perspective view of the skin beauty device 1 of FIG. 1, FIG. 3 shows one side of the skin beauty device 1 of FIG. 1, FIG. 4 shows that the light source 20 of the skin beauty device 1 of FIG. 1 is arranged inside the housing 110, FIG. 5 shows a form in which the light source 20 and the skin color measurement unit 30 of the skin beauty device 1 of FIG. 1 are arranged, FIG. 6 shows the transmission window 50 of the skin beauty device 1 of FIG. 1, and FIG. 7 is a block diagram showing the configuration of the skin beauty device 1 of FIG. 1.

[0033] Referring to FIGS. 1 to 7, a skin beauty device 1 according to an embodiment of the present invention includes a main body 10 that can be grasped by a user, a plurality of light sources 20 that can irradiate light with different wavelengths, a skin color measurement unit 30 that can measure the skin color of the user, and a control unit 40 that can control at least one of the intensity and irradiation interval of light in two different wavelength bands irradiated from the plurality of light sources 20 according to the skin color measured by the skin color measurement unit 30.

[0034] Here, the control unit 40 sets the value measured by the skin color measurement unit 30 for the Nth time as a reference value, sets the value measured by the skin color measurement unit 30 after the Nth time as a measured value, and controls at least one of the intensity and irradiation interval of light in two different wavelength bands irradiated from the plurality of light sources 20 according to the change rate between the reference value and the measured value.

[0035] Conventional skin beauty devices change the wavelength of light based on a predetermined one reference point, but the skin beauty device 1 of this embodiment can set the skin color of each individual user as a reference value, so it can be changed to the skin color desired by the user or a natural skin color suitable for the user. A detailed explanation thereof will be described later.

[0036] In this embodiment, with reference to FIG. 1, the x-axis is defined as horizontal, the y-axis as vertical, and the z-axis as height for explanation.

[0037] The main body 10 forms the outer shape of the skin beauty device 1 and can be grasped by the user. Also, each component constituting the skin beauty device 1 can be housed inside the main body 10 or attached to the main body 10.

[0038] The main body 10 may include a housing 110 provided with a first opening S1 where a first substrate 92 on which the light source 20 is mounted can be located, and a housing head 120 located at one end of the housing 110 and provided with a second opening S2 through which the light irradiated from the light source 20 can pass.

[0039] The housing 110 is formed by combining a first housing 110A and a second housing 110B, and the first housing 110A and the second housing 110B can be formed in the same shape.

[0040] Inside the housing 110, substrates 92 and 94 provided with a light source 20 and a skin color measurement unit 30 (to be described later), a battery 101, a vibration unit 117, an indicator 114, etc. can be arranged.

[0041] The housing 110 can be formed in a size that can be grasped by the user. For example, the housing 110 can be formed in a size of 2 cm to 5 cm in length, 3 cm to 8 cm in width, and 5 cm to 15 cm in height.

[0042] On the outside of the housing 110, a button unit 116, an indicator 114, a second contact sensor 118, and a charging terminal 119 can be exposed.

[0043] Note that the button unit 116 can be arranged on one side of the housing 110 as a configuration for operating the skin beauty device 1.

[0044] The indicator 114 can be arranged on the other side (for example, the side surface) of the housing 110 so as to be able to display the operating state of the skin beauty device 1, the measured skin state, etc.

[0045] It can be understood that the second contact sensor 118 is configured such that the operation of the skin color measurement unit 30 or the light source 20 can be performed only when the user's skin (for example, the palm) contacts the second contact sensor 118. For example, the control unit 40 (to be described later) can operate the skin color measurement unit 30 and / or the light source 20 only when the second contact sensor 118 and the skin are in contact.

[0046] The charging terminal 119 can be understood to be configured such that a separate charger can be connected.

[0047] The housing head 120 is coupled to one end of the housing 110, and a second opening S2 to which a transmission window 50 (to be described later) can be coupled can be provided.

[0048] On the front frame of the housing head 120, a first contact sensor insertion groove 122 into which a first contact sensor 60 described later can be inserted may be provided. Note that the front surface can be understood as the direction in which the light emitted from the light source 20 is irradiated.

[0049] The first contact sensor insertion grooves 122 may be provided in the same number as the first contact sensors 60. For example, when two first contact sensors 60 are provided, two first contact sensor insertion grooves 122 may be formed in the housing head 120.

[0050] In this embodiment, the case where two first contact sensors 60 and two first contact sensor insertion grooves 122 are provided will be described as an example, but one or three or more first contact sensors 60 and first contact sensor insertion grooves 122 may be provided.

[0051] The light source 20 can irradiate lights having different wavelengths and may be mounted on the first substrate 92. For example, the light source 20 may be an LED.

[0052] Specifically, the light source 20 includes a first light source 210 that can irradiate light in a first wavelength band and a second light source 220 that can irradiate light in a second wavelength band, and the first wavelength band and the second wavelength band may indicate different wavelength bands from each other.

[0053] The first wavelength band may indicate a wavelength band of 510 nm to 540 nm, and the second wavelength band may indicate a wavelength band of 580 nm to 600 nm. Preferably, the first wavelength band may indicate a wavelength band of 520 nm to 530 nm, and the second wavelength band may indicate a wavelength band of 585 nm to 592 nm.

[0054] The first wavelength band can be understood to indicate green light, and the second wavelength band can be understood to indicate yellow light.

[0055] Also, as described later, the light in the first wavelength band emitted from the first light source 210 and the light in the second wavelength band emitted from the second light source 220 can be irradiated simultaneously and repeated with a period at a predetermined interval.

[0056] For example, the light in the wavelength band of 520 nm to 530 nm irradiated from the first light source 210 and the wavelength band of 585 nm to 592 nm irradiated from the second light source 220 can be repeated a predetermined number of times with a cycle in which the light is irradiated at a predetermined intensity (for example, 300 lumens) for a predetermined time and disappears simultaneously for a predetermined time.

[0057] By simultaneously irradiating the skin with light having such a wavelength band, intensity, and period, the effect of reducing melanin in the skin can be shown, and a detailed explanation thereof will be described later.

[0058] Also, the plurality of first light sources 210 and the second light sources 220 can be alternately arranged. Thereby, the effect of simultaneously applying the light in the first wavelength band irradiated from the first light source 210 and the light in the second wavelength band irradiated from the second light source 220 to the skin can be enhanced.

[0059] Also, the light source 20 may include a third light source 230 that can irradiate white light.

[0060] The light emitted from the third light source 230 is reflected by the skin and then incident on the skin color measurement unit 30, and the skin color (skin tone) of the user can be measured from the skin color measurement unit 30. That is, it can be understood that the aforementioned first light source 210 and second light source 220 are configured to show the effect of reducing melanin in the skin, and the third light source 230 is configured to measure the skin color.

[0061] A plurality (for example, two) of the third light sources 230 are provided, and the skin color measurement unit 30 can be arranged between the plurality of third light sources 230. Thereby, the skin color can be effectively measured. Note that the skin color measurement unit 30 may be an RGB sensor.

[0062] The light source 20 is mounted on the first substrate 92, and the first substrate 92 can be housed inside the housing 110.

[0063] That is, the end of the housing 110 protrudes more than the light source 20, so that the light source 20 can be surrounded by the housing 110, and thus the light emitted from the light source 20 can be prevented from leaking from the side surface of the housing 110 (see FIG. 4).

[0064] The first substrate 92 may be mounted with a first light source 210, a second light source 220, a third light source 230, and a skin color measurement unit 30.

[0065] In addition, the skin beauty device 1 may selectively include a proximity sensor 80, and the proximity sensor 80 may be mounted on the first substrate 92.

[0066] The proximity sensor 80 is a sensor that can recognize the proximity of the skin and can be used when operating the skin beauty device 1 while moving it. For example, the proximity sensor 80 may be set such that the light of the light source 20 is irradiated onto the skin when the skin is located within a predetermined distance.

[0067] The second substrate 94 is disposed perpendicular to the first substrate 92, and a circuit for operating the control unit 40 may be provided on the second substrate 94.

[0068] The second substrate 94 is disposed between the first housing 110A and the second housing 110B and can support a battery 101, a vibration unit 117, an indicator 114, etc. built in the housing 110. Note that the first substrate 92 and the second substrate 94 may be PCB substrates.

[0069] In addition, a transmission window 50 through which the light emitted from the light source 20 can pass is disposed on the front surface of the first substrate 92, and the transmission window 50 can be fitted and fixed to the housing head 120.

[0070] The transmission window 50 may include portions having different light transmittance of the irradiated light.

[0071] Specifically, the transmissive window 50 can be provided such that the light transmittance of the portion disposed in front of the skin color measurement unit 30 is greater than the light transmittance of the portion disposed in front of the first light source 210 and the second light source 220.

[0072] More specifically, the transmissive window 50 includes a first transmissive window 510 disposed in front of the skin color measurement unit 30 and the third light source 230, and a second transmissive window 520 disposed in front of the first light source 210 and the second light source 220, and the first transmissive window 510 can be provided with a greater light transmittance than the second transmissive window 520.

[0073] For example, the first transmissive window 510 can be provided as a transparent window, and the second transmissive window 520 can be provided as an opaque window.

[0074] By providing the first transmissive window 510 as a transparent window, the light irradiated by the third light source 230 can be reflected by the skin and easily absorbed by the third light source 230.

[0075] Also, by providing the second transmissive window 520 as an opaque window, the first light source 210 and the second light source 220 can be hidden.

[0076] In this embodiment, the case where the first transmissive window 510 is provided to be long in one direction will be described as an example, but it is not limited thereto. As long as the light irradiated from the third light source 230 can be reflected by the skin and then incident on the skin color measurement unit 30, its shape is not limited.

[0077] The transmissive window 50 can include a prism sheet that can focus the light irradiated from the light source 20, or can be composed of a convex lens.

[0078] In this case, since the transmissive window 50 can focus the light emitted from the light source 20, it can show the effect of reducing the power consumption of the skin beauty device 1.

[0079] Also, the skin beauty device 1 can further include a vibration unit 117 that can indicate a plurality of mode states controlled by the control unit by vibration. Note that the vibration unit 117 can be a haptic motor.

[0080] Further, the vibration unit 117 is disposed inside the housing 110 and can be supported by the second substrate 94 or the housing 110.

[0081] Also, a first contact sensor 60 may be provided on one side of the main body 10.

[0082] The first contact sensor 60 is a sensor that senses contact with the skin, and a plurality of them may be provided. Specifically, the first contact sensor 60 is provided on the housing head 120 of the main body 10 and may protrude from the front end of the housing head 120.

[0083] The control unit 40 sets the skin color of the user measured by the skin color measurement unit 30 as a reference value, and can control at least one of the wavelength, intensity, irradiation interval, and number of irradiations of the light irradiated from the light source 20 by a predetermined algorithm.

[0084] Specifically, the control unit 40 sets the value measured by the skin color measurement unit 30 at the Nth time as a reference value, sets the value measured by the skin color measurement unit 30 after the Nth time as a measurement value, and according to the change rate between the reference value and the measurement value, can control at least one of the wavelength, intensity, and irradiation interval of the light in two different wavelength bands irradiated from the plurality of light sources 20.

[0085] For example, when N = 1, after the skin beauty device 1 is powered on, the skin color value first measured by the skin color measurement unit 30 is set as a reference value, the skin color values measured after the second time are set as measurement values, and based on the difference between the reference value and the measurement value, the wavelength, intensity, and irradiation interval of the light irradiated from the light source 20 can be controlled. Note that N = 1 is exemplary, and N may be set to a natural number of 2 or more by the control unit 40.

[0086] When the part where the skin beauty device 1 first makes contact is a relatively white part such as the lower part of the upper arm, and when the part where it makes contact for the second time and later is the face (assuming that the face has a darker skin color than the lower part of the upper arm), from the second time onwards, the light emitted from the first light source 210 and the second light source 220 is simultaneously irradiated onto the face, so that the skin color of the face can be changed to white like the lower part of the upper arm which is the reference point.

[0087] Also, the control unit 40 can control so that the wavelength, intensity, and irradiation interval of the light irradiated from the light source 20 have a plurality of modes.

[0088] Specifically, the control unit 40 can control the light source 20 so that a cycle in which light in a wavelength band of 520 nm to 530 nm and light in a wavelength band of 585 nm to 592 nm are simultaneously irradiated for a certain period of time and not simultaneously irradiated for a certain period of time is repeated a predetermined number of times.

[0089] Also, the control unit 40 can control so that the cycle (pulse cycle) in which the light in the wavelength band of 520 nm to 530 nm and the light in the wavelength band of 585 nm to 592 nm are applied to the skin is set differently according to the change rate between the reference value and the measured value. Note that the cycle (pulse cycle) can be set in a range where irradiation is simultaneous for 100 nm to 1000 nm and not simultaneous for 100 nm to 1000 nm.

[0090] For example, when the change rate between the reference value and the measured value measured by the skin color measurement unit 30 is smaller than a predetermined range, the control unit 40 operates in a first mode in which a cycle in which light in a wavelength band of 520 nm to 530 nm and light in a wavelength band of 585 nm to 592 nm are simultaneously irradiated for 100 ms to 400 ms and no light is irradiated for 300 ms to 500 ms is repeated a predetermined number of times, and can control the light source 20.

[0091] Further, when the change rate between the reference value measured by the skin color measurement unit 30 and the measured value is within a predetermined range, the control unit 40 controls the light source 20 to operate in a second mode in which light in the wavelength band of 520 nm to 530 nm and light in the wavelength band of 585 nm to 592 nm are simultaneously irradiated for 400 ms to 700 ms and simultaneously extinguished for 300 ms to 500 ms, and this cycle is repeated a predetermined number of times.

[0092] Further, when the change rate between the reference value and the measured value is greater than a predetermined range, the control unit 40 controls the light source 20 to operate in a third mode in which light in the wavelength band of 520 nm to 530 nm and light in the wavelength band of 585 nm to 592 nm are simultaneously irradiated for 700 ms to 1000 ms and simultaneously extinguished for 300 ms to 500 ms, and this cycle is repeated a predetermined number of times. Here, the light in the wavelength band of 520 nm to 530 nm may be irradiated from the first light source 210, and the light in the wavelength band of 585 nm to 592 nm may be irradiated from the second light source 220.

[0093] Also, the aforementioned cycle (predetermined number of times) in which the light source 20 is turned ON / OFF is repeated 15 to 25 times, preferably 20 times.

[0094] Also, the light irradiated from the first light source 210 and the second light source 220 by the control unit 40 can be controlled to be irradiated at 250 lumens to 350 lumens. Preferably, the light irradiated from the first light source 210 and the second light source 220 by the control unit 40 can be irradiated at 300 lumens.

[0095] In the foregoing embodiments, an example was given in which the periods during which light in the wavelength band of 520 nm to 530 nm and light in the wavelength band of 585 nm to 592 nm are applied to the skin are set differently based on the change rate. However, the idea of the present invention is not limited to this, and may include setting different light intensities.

[0096] As another example where the periods are set differently, when the change rate between the reference value and the measured value measured by the skin color measurement unit 30 is smaller than a predetermined range, the control unit 40 controls the light source 20 to operate in a first mode in which light in the wavelength band of 520 nm to 530 nm and light in the wavelength band of 585 nm to 592 nm are simultaneously irradiated for 80 ms to 120 ms, and the period in which no light is irradiated for 280 ms to 320 ms is repeated a predetermined number of times. Further, when the change rate between the reference value and the measured value measured by the skin color measurement unit 30 is within a predetermined range, the control unit 40 controls the light source 20 to operate in a second mode in which light in the wavelength band of 520 nm to 530 nm and light in the wavelength band of 585 nm to 592 nm are simultaneously irradiated for 180 ms to 220 ms, and the period in which they simultaneously disappear for 280 ms to 320 ms is repeated a predetermined number of times. Further, when the change rate between the reference value and the measured value is larger than a predetermined range, the control unit 40 controls the light source 20 to operate in a third mode in which light in the wavelength band of 520 nm to 530 nm and light in the wavelength band of 585 nm to 592 nm are simultaneously irradiated for 280 ms to 320 ms, and the period in which they simultaneously disappear for 280 ms to 320 ms is repeated a predetermined number of times.

[0097] In this way, by controlling the wavelength bands, intensities, and periods of the two lights, the melanin pigment in the skin can be reduced. The experimental results for this are as follows.

[0098]

Table 1

[0099] Table 1 above shows, by way of example, repeating 20 times the period of turning the light source 20 ON and OFF at 100 ms.

[0100] Table 1 shows the results of experiments with different wavelengths, intensities, and simultaneous irradiations of the light emitted from the light source 20. Here, the horizontal axis represents the wavelength of the light emitted from the light source 20 (Yellow represents the second wavelength band, Green represents the first wavelength band, and Yellow + Green indicates that the first and second wavelength bands are irradiated simultaneously), and the vertical axis represents the intensity of the light emitted from the light source 20.

[0101] Referring to Table 1 above, when the light in the first and second wavelength bands was simultaneously irradiated and the skin cells were irradiated with an intensity of 160 lumens (lm), the reduction of melanin was the most effective.

[0102] The above experiment was a cell experiment. Since the epidermal transmittance when irradiated on the skin is 35% - 45%, the optimal intensity of the light source 20 irradiated on the skin can be 250 lumens - 350 lumens (lm).

[0103] The present invention has derived the wavelength, intensity, period, and simultaneous irradiation of light that are most effective for reducing melanin, and this can be realized from the skin beauty device 1 of this embodiment.

[0104] Also, an algorithm for operating the light source 20 in a plurality of modes by the control unit 40 will be described with reference to Table 2 as follows.

[0105]

Table 2

[0106] Here, R, G, and B on the vertical axis represent the values of R, G, and B that can be measured by the skin color measurement unit 30, and approaching 1 - 10 on the horizontal axis means that the skin color gradually represents a darker color.

[0107] For example, when the change rate is less than 15%, the control unit 40 controls the light source 20 to operate in the first mode; when the change rate is 15% - 30%, the control unit 40 controls the light source 20 to operate in the second mode; when the change rate exceeds 30%, the control unit 40 can control the light source 20 to operate in the third mode.

[0108] Note that the rate of change can be defined as 1 - (measured value / reference value).

[0109] For example, when the reference value is measured as 51,574 (R = 23,651, G = 65,656, B = 51,574, average of RGB = 51,574) by the skin color measurement unit 30, and the measured value is measured as 26,524 (R = 12,880, G = 33,346, B = 33,346, average of RGB = 26,524) by the skin color measurement unit 30, the rate of change can be 48.57% (1 - (26,524 / 51,574)). At this time, the control unit 40 can control the light source 20 to operate in the third mode.

[0110] In the foregoing embodiments, the case where the control unit 40 operates the light source 20 in three modes (the first mode, the second mode, and the third mode) is taken as an example for explanation. However, the idea of the present invention is not limited thereto, and it may also include the case where the control unit 40 operates in two modes or four or more modes.

[0111] FIG. 8 is a diagram schematically showing the principle of measuring skin color by the third light source 230 and the skin color measurement unit 30 of the skin beauty device 1 in FIG. 1.

[0112] Referring to FIG. 8, the white light irradiated from the third light source 230 passes through the first transmission window 510, is reflected by the skin, and then reaches the skin color measurement unit 30.

[0113] The skin color information that reaches the skin color measurement unit 30 is transmitted to the control unit 40, and the control unit 40 can calculate the above-mentioned rate of change. At this time, the housing head 120 can form a dark room so that the light reflected by the skin does not leak.

[0114] FIG. 9 is a flowchart showing the control method of the skin beauty device 1 in FIG. 1.

[0115] Referring to FIG. 9, the method of controlling the skin beauty device 1 will be described as follows.

[0116] When the user presses the button unit 116, the power supply of the skin beauty device 1 can be turned on (S10). Thereafter, steps may be executed including: a step (S20) in which the skin color is measured by the skin color measurement unit 30 and a reference value is set; a step (S30) in which the skin color is measured by the skin color measurement unit 30 and a measured value is set; a step (S40) in which the control unit 40 calculates the change rate between the reference value and the measured value; and a step (S50) in which at least one of the wavelength, intensity, and irradiation interval of the light irradiated from the light source is controlled based on the change rate calculated by the control unit 40, and light in at least two wavelength bands is irradiated onto the skin.

[0117] Specifically, the step (S20) in which the skin color is measured by the skin color measurement unit 30 and the reference value is set may be performed through the following process.

[0118] When the second contact sensor 118 contacts the user's skin (for example, the skin of the hand) and the first contact sensor 60 contacts the user's skin (for example, the skin of the face), after white light is irradiated onto the skin from the third light source 230, the white light reflected by the skin enters the skin color measurement unit 30, and thus the skin color (reference value) can be measured.

[0119] When the reference value measurement is performed, the light emitted from the indicator 114 is changed to indicate that the skin color is being measured. When the measurement of the reference value is completed, the completion of the measurement may be indicated by vibration from the vibration unit 117 or sound from an acoustic unit (not shown).

[0120] When the measurement of the reference value is completed, if the user contacts the skin beauty device 1 at another position on the skin, a step (S30) may be executed in which the skin color is measured by the skin color measurement unit 30 and the measured value is set.

[0121] At this time, similar to the above, when the second contact sensor 118 contacts the user's skin (for example, the skin of the hand) and the first contact sensor 60 contacts the user's skin (for example, the skin of the face), after white light is irradiated onto the skin from the third light source 230, the white light reflected by the skin enters the skin color measurement unit 30, and thus the skin color (measured value) can be measured.

[0122] After that, a step (S40) in which the control unit 40 calculates the change rate between the reference value and the measured value measured by the skin color measurement unit 30 can be executed.

[0123] As described above, the change rate can be defined as 1 - (measured value / reference value).

[0124] After that, based on the change rate calculated by the control unit 40, at least one of the wavelength, intensity, and irradiation interval of the light irradiated from the light source is controlled, and a step (S50) in which the skin is irradiated with light in at least two wavelength bands can be executed.

[0125] For example, when the change rate is less than 15%, the control unit 40 controls the light source 20 to operate in the first mode. When the change rate is 15% to 30%, the control unit 40 controls the light source 20 to operate in the second mode. When the change rate exceeds 30%, the control unit 40 can control the light source 20 to operate in the third mode.

[0126] At this time, when the first light source 210 and the second light source 220 of the light source 20 operate, the light in the first wavelength band and the second wavelength band can be irradiated.

[0127] Note that the first mode to the third mode can indicate the values of the wavelength, intensity, and irradiation interval of the light described above.

[0128] Also, in this case as well, it can be set that the first mode to the third mode operate only when the second contact sensor 118 contacts the user's skin (for example, the skin of the hand) and the first contact sensor 60 contacts the user's skin (for example, the skin of the face).

[0129] After that, when the user contacts the skin beauty device 1 at another position of the skin, the measured value at that position is measured. After the change rate is calculated, the light source 20 can be controlled to operate in the first mode to the third mode.

[0130] By repeating the process as described above, the user can use the skin beauty device 1 while moving the skin beauty device 1 to a position where it is intended to reduce melanin pigment.

[0131] The foregoing embodiment exemplifies the automatic mode in which, after turning on the power by the button unit 116, the light source 20 automatically operates in a plurality of modes by bringing the first contact sensor 60 into contact with the skin. Further, the skin beauty device 1 may include pressing the button unit 116 a plurality of times to select a plurality of modes (first mode to third mode).

[0132] As described above, the skin beauty device 1 of the present embodiment can be changed to a skin color desired by the user by setting the reference value to a value measured from the user's skin. Further, by controlling the optimized light wavelength, intensity, irradiation interval, and simultaneous irradiation, the melanin pigment in the skin can be effectively reduced.

[0133] In the foregoing embodiment, the skin beauty device 1 that can be held by hand has been described by taking as an example the realization of the optimized light wavelength, intensity, irradiation interval, and simultaneous irradiation. However, the idea of the present invention is not limited to this, and in a mask beauty device in which LEDs are mounted, the foregoing control (optimized light wavelength, intensity, irradiation interval, simultaneous irradiation) may be realized.

[0134] Hereinafter, the effects of the foregoing skin beauty device will be described.

[0135] The skin beauty device 1 of the present embodiment can set the skin color of each individual user as a reference value, so that it can be changed to a skin color desired by the user or a natural skin color suitable for the user.

[0136] Further, the skin beauty device 1 can realize the light wavelength, intensity, period (irradiation interval), and simultaneous irradiation that are most effective for reducing melanin.

[0137] In addition, the plurality of first light sources 210 and second light sources 220 can be alternately arranged. Thereby, the effect that the light in the first wavelength band irradiated from the first light source 210 and the light in the second wavelength band irradiated from the second light source 220 are simultaneously applied to the skin can be enhanced.

[0138] A plurality (for example, two) of third light sources 230 are provided, and the skin color measurement unit 30 can be arranged between the plurality of third light sources 230. Thereby, the skin color can be effectively measured.

[0139] When the first transmission window 510 is provided with a transparent window, the light irradiated on the third light source 230 can be reflected by the skin and can be easily absorbed by the third light source 230. When the second transmission window 520 is provided with an opaque window, the first light source 210 and the second light source 220 can be hidden.

[0140] In addition, the transmission window 50 can include a prism sheet that can focus the light irradiated from the light source 20, or can be formed of a convex lens. In this case, since the transmission window 50 can focus the light emitted from the light source 20, it can show the effect of reducing the power consumption of the skin beauty device 1.

[0141] FIG. 10 is a diagram schematically showing a transmission window 50' according to another embodiment of the present invention.

[0142] Hereinafter, the transmission window 50' of the skin beauty device according to another embodiment of the present invention will be described with reference to FIG. 10.

[0143] However, the embodiment shown in FIG. 10 is different in that the arrangement of the transmission window 50', the third light source 230', and the skin color measurement unit 30' is different from the embodiment shown in FIGS. 1 to 9. Therefore, the description will focus on the differences, and for the same parts, the description and reference numerals of the above-described embodiment will be incorporated.

[0144] Referring to FIG. 10, the third light source 230' and the skin color measurement unit 30' may be arranged on one side (for example, below or above) of the first substrate 92, and the first transmission window 510' may be provided in a shape surrounded by the second transmission window 520'.

[0145] Specifically, the first light source 210' and the second light source 220' are arranged above the third light source 230', and the skin color measurement unit 30' can be arranged between the two third light sources 230'.

[0146] Further, the transmission window 50' includes a first transmission window 510' arranged in front of the skin color measurement unit 30' and the third light source 230', and a second transmission window 520' arranged in front of the first light source 210' and the second light source 220'. The first transmission window 510' can be provided with a higher light transmittance than the second transmission window 520'. Also, the first transmission window 510' can be provided smaller than the second transmission window 520'.

[0147] By arranging the first transmission window 510' through which the first substrate 92 can be seen on the side in a small size, and providing the second transmission window 520' through which the first substrate 92 can be hidden in a large size, the aesthetic appearance can be improved.

[0148] As described above, the skin beauty device and its control method according to the embodiments of the present invention have been described as specific examples, but this is merely illustrative, and the present invention is not limited thereto. It should be construed as having the broadest scope based on the basic idea disclosed in this specification. Those skilled in the art can combine and substitute the disclosed embodiments to implement patterns of shapes not disclosed, but this also does not deviate from the scope of the present invention. Furthermore, those skilled in the art can easily change or modify the disclosed embodiments based on this specification, and it is clear that such changes or modifications also belong to the scope of rights of the present invention.

Explanation of Reference Numerals

[0149] 1: Skin beauty device 10: Main body 20: Light source 30: Skin color measurement unit 40: Control unit 50: Transmission window 60: First contact sensor

Claims

1. a main body that can be held by a user, a plurality of light sources capable of irradiating light of different wavelengths, a skin color measurement unit capable of measuring the skin color of the user, a control unit capable of controlling at least one of the wavelength, intensity, and irradiation interval of light in two different wavelength bands irradiated from the plurality of light sources according to the skin color measured by the skin color measurement unit, the control unit, sets the value measured by the skin color measurement unit for the Nth time as a reference value, sets the value measured by the skin color measurement unit after the Nth time as a measurement value, and according to the change rate between the reference value and the measurement value, can control at least one of the wavelength, intensity, and irradiation interval of light in two different wavelength bands irradiated from the plurality of light sources, the control unit, when the change rate between the reference value and the measurement value is smaller than a predetermined range, the light in the wavelength band of 520 nm to 530 nm and the light in the wavelength band of 585 nm to 592 nm are simultaneously irradiated for 100 ms to 400 ms, and the cycle of not being irradiated for 300 ms to 500 ms is repeated a predetermined number of times. Controls the light source to operate in the first mode, when the change rate between the reference value and the measurement value is within a predetermined range, the light in the wavelength band of 520 nm to 530 nm and the light in the wavelength band of 585 nm to 592 nm are simultaneously irradiated for 400 ms to 700 ms, and the cycle of disappearing simultaneously for 300 ms to 500 ms is repeated a predetermined number of times. Controls the light source to operate in the second mode, when the change rate between the reference value and the measurement value is larger than a predetermined range, the light in the wavelength band of 520 nm to 530 nm and the light in the wavelength band of 585 nm to 592 nm are simultaneously irradiated for 700 ms to 1000 ms, and the cycle of disappearing simultaneously for 300 ms to 500 ms is repeated a predetermined number of times. Controls the light source to operate in the third mode, a skin beauty device.

2. the control unit, when the change rate is less than 15%, controls the light source to operate in the first mode, when the change rate is 15% to 30%, controls the light source to operate in the second mode, The skin beauty device according to claim 1, wherein when the change rate exceeds 30%, the light source can be controlled to operate in the third mode.

3. The skin beauty device according to claim 1, wherein the predetermined number of times can be set to 15 to 25 times.

4. A second contact sensor is provided on one side of the main body, The control unit controls the skin color measurement unit to operate only when the second contact sensor comes into contact with the skin. The skin beauty device according to claim 1.

5. The light source is A first light source capable of irradiating light in a first wavelength band, A second light source capable of irradiating light in a second wavelength band, and The first wavelength band represents a wavelength band of 520 nm to 530 nm, and the second wavelength band represents a wavelength band of 585 nm to 592 nm. The skin beauty device according to claim 1.

6. The light source is Further includes a plurality of third light sources capable of irradiating white light, The skin color measurement unit is disposed between the plurality of third light sources. The skin beauty device according to claim 5.

7. The light source and the skin color measurement unit are mounted on a first substrate, On the front surface of the first substrate, a transmissive window through which light irradiated from the light source can pass is disposed. The skin beauty device according to claim 1.

8. The light source is A first light source capable of irradiating light in a first wavelength band of 520 nm to 530 nm, A second light source capable of irradiating light in a second wavelength band of 585 nm to 592 nm, A third light source capable of irradiating white light, and The transmissive window is provided such that the light transmittance of the portion disposed in front of the skin color measurement unit is greater than the light transmittance of the portion disposed in front of the first light source and the second light source. The skin beauty device according to claim 7.

9. The transmissive window includes a first transmissive window disposed in front of the skin color measurement unit and the third light source, A second transmissive window disposed in front of the first light source and the second light source, and The first transmissive window is provided with a greater light transmittance than the second transmissive window. The skin beauty device according to claim 8.

10. The transmissive window includes a prism sheet capable of focusing the light irradiated from the light source or is composed of a convex lens. The skin beauty device according to claim 8.

11. The skin color measurement unit is composed of an RGB sensor. The skin beauty device according to claim 1.

12. The skin beauty device is A vibration unit capable of indicating a plurality of mode states controlled by the control unit by vibration, A first contact sensor provided on one side of the main body and capable of sensing contact with the skin. The skin beauty device according to claim 1.

13. The main body is A housing that can be grasped by a user and is provided with a first opening S1 where a first substrate on which the light source is mounted can be located. A housing head that is located at one end of the housing and is provided with a second opening S2 through which light emitted from the light source can pass, the skin beauty device according to claim 1.

14. The first substrate on which the light source is mounted is housed inside the housing so that light emitted from the light source can be prevented from leaking from the side surface of the housing, and an end of the housing protrudes beyond the light source, the skin beauty device according to claim 13.

Images