Skin cosmetic device and control method thereof

Abstract

The present application relates to a skin cosmetic device and a control method thereof. According to an aspect of the present application, there can be provided a skin cosmetic device including a main body to be held by a user, a plurality of light sources capable of irradiating light of different wavelengths from each other, a skin color measuring section capable of measuring a skin color of the user, and a control section capable of controlling at least one of an intensity and an irradiation interval of light of two bands different from each other irradiated by the plurality of light sources according to the skin color measured by the skin color measuring section.

Description

TECHNICAL FIELD

[0001] The present application relates to a skin cosmetic device and a control method thereof. BACKGROUND

[0002] Recently, people's interest in cosmetics is increasing, and not only cosmetics but also skin cosmetic devices that can improve the skin condition are increasing.

[0003] Most of the existing skin cosmetic devices have a problem in that it is difficult to change the skin color desired by each user because they use a uniform reference value to start the skin cosmetic device regardless of the skin color of each user.

[0004] In addition, the existing IPL skin cosmetic device has a problem in that it is difficult to achieve the optimal waveband for reducing skin melanin because it uses a flash lamp to generate irregular energy. In addition, the existing IPL skin cosmetic device also has the disadvantage of requiring regular replacement of the lamp.

[0005] PRIOR ART DOCUMENT

[0006] PATENT DOCUMENT

[0007] Patent Document: Korean Registered Patent KR10-2033342B1 (Published on October 11, 2019) SUMMARY

[0008] PROBLEMS TO BE SOLVED BY THE INVENTION

[0009] Embodiments of the present application are proposed to solve the problems as described above, and want to provide a skin cosmetic device that sets the reference value of the skin color differently according to the user, thereby being able to display a cosmetic effect that matches the skin color of each user.

[0010] Want to provide a skin cosmetic device that uses the skin color of the user as a reference, thereby being able to control the light irradiated by the light source with a specific wavelength, period (pulse), and intensity to be able to change to the skin color desired by the user.

[0011] TECHNICAL SOLUTION

[0012] According to an embodiment of the present application, a skin cosmetic device can be provided, which includes a main body to be held by a user, a plurality of light sources to irradiate light of different wavelengths from each other, a skin color measuring unit to measure a skin color of the user, and a control unit to control at least one of intensity and irradiation interval of light of two bands of different wavelengths from each other irradiated by the plurality of light sources according to the skin color measured by the skin color measuring unit, the control unit being capable of setting a value measured by the skin color measuring unit at an Nth time as a reference value, setting a value measured by the skin color measuring unit after the Nth time as a measured value, and controlling at least one of wavelength, intensity, and irradiation interval of light of two bands of different wavelengths from each other irradiated by the plurality of light sources according to a change rate of the reference value and the measured value.

[0013] In addition, a skin cosmetic device can be provided, in which the control unit can control the light sources to repeatedly a predetermined number of times a cycle in which light of a 520 nm to 530 nm band and light of a 585 nm to 592 nm band are simultaneously irradiated for a certain time and are not simultaneously irradiated during a certain time, and set the cycle in which the light of the 520 nm to 530 nm band and the light of the 585 nm to 592 nm band are applied to the skin to be different according to a change rate of the reference value and the measured value.

[0014] In addition, a skin cosmetic device can be provided, in which the control unit, when the change rate of the reference value and the measured value is less than a predetermined range, controls the light sources to operate in a first mode in which a cycle in which light of a 520 nm to 530 nm band and light of a 585 nm to 592 nm band are simultaneously irradiated for 100 ms to 400 ms and are not irradiated during 300 ms to 500 ms is repeated a predetermined number of times, when the change rate of the reference value and the measured value is the predetermined range, controls the light sources to operate in a second mode in which a cycle in which light of a 520 nm to 530 nm band and light of a 585 nm to 592 nm band are simultaneously irradiated for 400 ms to 700 ms and are simultaneously turned off during 300 ms to 500 ms is repeated a predetermined number of times, and when the change rate of the reference value and the measured value is greater than the predetermined range, controls the light sources to operate in a third mode in which a cycle in which light of a 520 nm to 530 nm band and light of a 585 nm to 592 nm band are simultaneously irradiated for 700 ms to 1000 ms and are simultaneously turned off during 300 ms to 500 ms is repeated a predetermined number of times.

[0015] In addition, a skin cosmetic device can be provided, wherein the control section controls the light source to operate in the first mode when the rate of change is less than 15%, controls the light source to operate in the second mode when the rate of change is 15% to 30%, and controls the light source to operate in the third mode when the rate of change is 30% or more.

[0016] In addition, a skin cosmetic device can be provided, wherein the preset number of times can be set to 15 to 25 times.

[0017] In addition, a skin cosmetic device can be provided, wherein a second contact sensor is provided on one side of the main body, and the control section controls the skin color measurement section to operate only when the second contact sensor is in contact with the skin.

[0018] In addition, a skin cosmetic device can be provided, wherein the light source includes a first light source capable of irradiating light of a first waveband, and a second light source capable of irradiating light of a second waveband, the first waveband and the second waveband having different wavebands from each other.

[0019] In addition, a skin cosmetic device can be provided, wherein the first waveband can represent a 520 nm to 530 nm waveband, and the second waveband can represent a 585 nm to 592 nm waveband.

[0020] In addition, a skin cosmetic device can be provided, wherein the light source further includes a plurality of third light sources capable of irradiating white light, and the skin color measurement section is disposed between the plurality of third light sources.

[0021] In addition, a skin cosmetic device can be provided, wherein the first light source and the second light source are alternately disposed.

[0022] In addition, a skin cosmetic device can be provided, wherein the light source and the skin color measurement section are mounted on a first substrate, and a transmission window through which light irradiated by the light source is transmitted is disposed in front of the first substrate.

[0023] In addition, a skin cosmetic device can be provided, wherein the light source includes a first light source capable of irradiating light of a first waveband, a second light source capable of irradiating light of a second waveband, and a third light source capable of irradiating white light, and the transmission window is provided such that a light transmittance of a portion disposed in front of the skin color measurement section is greater than a light transmittance of a portion disposed in front of the first light source and the second light source.

[0024] In addition, there can be provided a skin care device, wherein the transmission window is provided to include: a first transmission window disposed in front of the skin color measuring portion and the third light source; and a second transmission window disposed in front of the first light source and the second light source, the first transmission window having a higher light transmittance than the second transmission window.

[0025] In addition, there can be provided a skin care device, wherein the transmission window includes a prism sheet that can collect light irradiated by the light source, or is provided by a convex mirror.

[0026] In addition, there can be provided a skin care device, wherein the skin color measuring portion is provided by an RGB sensor.

[0027] In addition, there can be provided a skin care device, wherein the skin care device further includes: a vibration portion capable of displaying a plurality of mode states controlled by the control portion by vibration; and a first contact sensor provided at one side of the main body and capable of sensing contact of the skin.

[0028] In addition, there can be provided a skin care device, wherein the main body includes: a housing that can be held by a user, and provides a first opening S1 in which a first substrate in which the light source is mounted can be placed; and a housing head portion provided at one end of the housing, and provides a second opening S2 through which light irradiated by the light source can be transmitted.

[0029] In addition, there can be provided a skin care device, wherein the first substrate in which the light source is mounted is accommodated inside the housing, and an end portion of the housing protrudes more than the light source to prevent light irradiated by the light source from leaking toward a side surface of the housing.

[0030] According to other embodiments of the present application, there can be provided a control method of a skin care device, including: a step S20 of measuring a skin color by a skin color measuring portion to set a reference value; a step S30 of measuring a skin color by the skin color measuring portion to set a measured value; a step S40 of calculating a rate of change of the reference value and the measured value by a control portion; and a step S50 of controlling at least one of a wavelength, an intensity, and an irradiation interval of light irradiated by a light source to irradiate light of at least two bands to the skin according to the rate of change calculated by the control portion.

[0031] Additionally, a control method for a skin beauty device can be provided, wherein the control unit controls the light source to operate in a first mode when the rate of change of the reference value and the measured value is less than a preset range. The first mode involves repeating the following cycle a preset number of times: simultaneously irradiating the light source with light in the 520nm-530nm wavelength band and light in the 585nm-592nm wavelength band for 100ms to 400ms, and then not irradiating the light source during the 300ms-500ms period. When the rate of change of the reference value and the measured value is within a preset range, the light source is controlled to operate in a second mode. The second mode involves repeating the following cycle a preset number of times. The light source is repeatedly irradiated with light in the 520nm to 530nm and 585nm to 592nm bands for 400ms to 700ms, and then simultaneously turned off for 300ms to 500ms. When the rate of change of the reference value and the measured value is greater than a preset range, the light source is controlled to operate in a third mode. The third mode is to repeat the following cycle for a preset number of times: simultaneously irradiate with light in the 520nm to 530nm and 585nm to 592nm bands for 700ms to 1000ms, and then simultaneously turn off for 300ms to 500ms.

[0032] Invention Effects

[0033] According to an embodiment of the present invention, a skin beauty device can display beauty effects that suit the skin tone of each user by setting different baseline values ​​for skin tone according to the user.

[0034] In addition, by using the user's skin tone as a reference, the light emitted by the light source is controlled with specific wavelengths, periods (pulses), and intensities, thereby enabling the skin tone to be altered to the user's desired color. Attached Figure Description

[0035] Figure 1 This is a perspective view showing a skin beauty device according to an embodiment of the present invention.

[0036] Figure 2 It is shown Figure 1 An exploded 3D diagram of a skin beauty device.

[0037] Figure 3 It is shown Figure 1 A picture of one side of a skin beauty device.

[0038] Figure 4 This diagram shows the light source of the skin beauty device positioned inside the housing.

[0039] Figure 5 It shows the configuration. Figure 1 The diagram shows the shape of the light source and skin color measuring part of the skin beauty instrument.

[0040] Figure 6 It is shown Figure 1 Image of the translucent window of a skin beauty device.

[0041] Figure 7 It is shown Figure 1 A block diagram illustrating the structure of a skin beauty device.

[0042] Figure 8 It is a general overview Figure 1 The diagram illustrates the principle of the third light source in a skin beauty device and the principle of skin color measurement by the skin color measuring unit.

[0043] Figure 9 It is shown Figure 1 A diagram showing the control sequence of a skin beauty device.

[0044] Figure 10 This is a schematic diagram illustrating a transmission window according to another embodiment of the invention.

[0045] Explanation of reference numerals in the attached figures

[0046] 1: Skin beauty device 10: Main body

[0047] 20: Light source; 30: Skin color measurement unit

[0048] 40: Control unit; 50: Transmission window

[0049] 60: First contact sensor Detailed Implementation

[0050] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. Furthermore, in the description of the present invention, detailed descriptions of relevant well-known structures or functions will be omitted if it is determined that such detailed descriptions would obscure the essence of the present invention.

[0051] Figure 1 This is a perspective view showing a skin beauty device 1 according to an embodiment of the present invention. Figure 2 It is shown Figure 1 An exploded 3D view of the skin beauty device 1. Figure 3 It is shown Figure 1 A side view of the skin beauty device 1. Figure 4 This diagram shows the light source 20 of the skin beauty device 1 arranged inside the housing 10. Figure 5 It shows the configuration. Figure 1 A diagram showing the shape of the light source 20 and the skin color measuring unit 30 of the skin beauty instrument 1. Figure 6 It is shown Figure 1 The image shows the transmission window 50 of the skin beauty device 1. Figure 7 It is shown Figure 1 A block diagram of the structure of the skin beauty device 1.

[0052] refer toFigures 1 to 7 The skin cosmetic device 1 according to an embodiment of the present application can include a main body 10 to be held by a user, a plurality of light sources 20 capable of irradiating light of different wavelengths from each other, a skin color measuring part 30 capable of measuring a skin color of the user, and a control part 40 capable of controlling at least one of an intensity and an irradiation interval of two bands of light of different wavelengths from each other irradiated by the plurality of light sources 20 according to the skin color measured by the skin color measuring part 30.

[0053] The control part 40 can set a value measured by the skin color measuring part 30 at an Nth time as a reference value, set a value measured by the skin color measuring part 30 after the Nth time as a measured value, and control at least one of the intensity and the irradiation interval of the two bands of light of different wavelengths from each other irradiated by the plurality of light sources 20 according to a change rate of the reference value and the measured value.

[0054] The existing skin cosmetic device changes a wavelength of light with a reference point defined in advance as a reference, whereas the skin cosmetic device 1 according to the embodiment can set a skin color of each user as a reference value, and thus can change a skin color desired by the user or a natural skin color suitable for the user. Details thereof will be described later.

[0055] In the embodiment, an x-axis is defined as a horizontal direction, a y-axis is defined as a vertical direction, and a z-axis is defined as a height, and the embodiment is described with reference to the x-axis, the y-axis, and the z-axis. Figure 1

[0056] The main body 10 constitutes an outer shape of the skin cosmetic device 1 to be held by the user. In addition, constituent elements constituting the skin cosmetic device 1 can be accommodated inside the main body 10 or mounted on the main body 10.

[0057] The main body 10 can include a housing 110 providing a first opening S1 in which a first substrate 92 in which the light source 20 is mounted can be accommodated, and a housing head 120 provided at one end of the housing 110 to provide a second opening S2 through which light irradiated by the light source 20 can be transmitted.

[0058] The housing 110 can be 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.

[0059] The substrate 92, 94 provided with the light source 20, the skin color measuring part 30, the battery 101, the vibration part 117, the indicator 114, and the like described later can be provided inside the housing 110.

[0060] The housing 110 can be formed to have a size that can be held by the user. For example, the housing 110 can be formed to have a size of 3 cm to 8 cm in a horizontal direction, 2 cm to 5 cm in a vertical direction, and 5 cm to 15 cm in a height.​

[0061] A button portion 116, an indicator 114, a second contact sensor 118, and a charging terminal 119 can be exposed on the outside of the housing 110.

[0062] The button portion 116, which is a structure for starting the skin care device 1, can be disposed on one side of the housing 110.

[0063] The indicator 114 can be disposed on the other side (e.g., side surface) of the housing 110 to be able to display the operation state of the skin care device 1, the measured skin state, etc.

[0064] The second contact sensor 118 can be understood as a structure that enables the skin color measuring portion 30 or the light source 20 to perform an operation only when the user's skin (e.g., palm) is in contact with the second contact sensor 118. For example, the control portion 40, which will be described later, can be a structure that enables the skin color measuring portion 30 and / or the light source 20 to operate only when the skin is in contact with the second contact sensor 118.

[0065] The charging terminal 119 can be understood as a structure to which a charger can be additionally connected.

[0066] The housing head portion 120 can be combined with one end of the housing 110 to provide a second opening S2 to which the transmission window 50, which will be described later, can be combined.

[0067] A first contact sensor insertion slot 122, into which the first contact sensor 60 can be inserted, can be provided in the front frame of the housing head portion 120. Here, the front can be understood as a direction in which light emitted from the light source 20 is emitted.

[0068] The first contact sensor insertion slot 122 can be provided in the same number as the first contact sensor 60. For example, when two first contact sensors 60 are provided, two first contact sensor insertion slots 122 can be formed in the housing head portion 120.

[0069] In the present embodiment, a case in which two first contact sensors 60 and first contact sensor insertion slots 122 are provided is illustrated, but one or more than three first contact sensors 60 and first contact sensor insertion slots 122 can be provided.

[0070] The light sources 20, which can emit light of different wavelengths from each other, can be mounted on the first substrate 92. For example, the light sources 20 can be LEDs.

[0071] Specifically, the light sources 20 can include a first light source 210 capable of emitting light of a first wavelength band and a second light source 220 capable of emitting light of a second wavelength band, the first wavelength band and the second wavelength band being different from each other.

[0072] The first wavelength band can represent a 510 nm to 540 nm wavelength band, and the second wavelength band can represent a 580 nm to 600 nm wavelength band. Preferably, the first wavelength band can represent a 520 nm to 530 nm wavelength band, and the second wavelength band can represent a 585 nm to 592 nm wavelength band.

[0073] It can be understood that the first wavelength band represents light of green (Green), and the second wavelength band represents light of yellow (Yellow).

[0074] In addition, as described later, the light of the first wavelength band emitted by the first light source 210 and the light of the second wavelength band emitted by the second light source 220 can be simultaneously irradiated, can have a cycle at a predetermined interval, and be repeated.

[0075] For example, it can be repeated a predetermined number of times in a cycle in which the 520 nm to 530 nm wavelength band light irradiated by the first light source 210 and the 585 nm to 592 nm wavelength band light irradiated by the second light source 220 are irradiated at a predetermined intensity (for example, 300 lumens) for a predetermined time, and are simultaneously turned off during the predetermined time.

[0076] By simultaneously irradiating the light having the wavelength band, intensity, and cycle as described above to the skin, it is possible to show a melanin reduction effect, and details thereof will be described later.

[0077] In addition, a plurality of first light sources 210 and second light sources 220 can be alternately arranged. Thereby, the effect of simultaneously applying the light of the first wavelength band irradiated by the first light source 210 and the light of the second wavelength band irradiated by the second light source 220 to the skin can be greater.

[0078] In addition, the light source 20 can include a third light source 230 capable of irradiating white light.

[0079] The light emitted by the third light source 230 is reflected on the skin, and then incident to the skin color measuring part 30, and the skin tone of the user can be measured by the skin color measuring part 30. That is, it can be understood that the first light source 210 and the second light source 220 described above are structures for showing a melanin reduction effect of the skin, and the third light source 230 is a structure for measuring the skin color.

[0080] The third light source 230 can be provided as a plurality (for example, two), and the skin color measuring part 30 can be arranged between the plurality of third light sources 230. Thereby, the skin color can be effectively measured. Among them, the skin color measuring part 30 can be an RGB sensor.

[0081] The light source 20 can be mounted on a first substrate 92, and the first substrate 92 can be accommodated inside the housing 110.

[0082] That is, compared to the light source 20, the end of the housing 110 protrudes and the light source 20 can be surrounded by the housing 110, and thus, it is possible to prevent light irradiated by the light source 20 from leaking toward the side surface of the housing 110 (refer to FIG. 2). Figure 4

[0083] The first light source 210, the second light source 220, the third light source 230, and the skin color measurement part 30 can be mounted on the first substrate 92.

[0084] In addition, the skin care device 1 can selectively include a proximity sensor 80, which can be mounted on the first substrate 92.

[0085] The proximity sensor 80, which is a sensor that can recognize the proximity to the skin, can be used when the skin care device 1 is operated while being moved. For example, the proximity sensor 80 can be set to allow the light of the light source 20 to be irradiated onto the skin when the skin is located within a preset distance.

[0086] The second substrate 94 can be configured perpendicular to the first substrate 92, and a circuit for operating the control part 40 can be provided on the second substrate 94.

[0087] The second substrate 94 can be disposed between the first housing 110A and the second housing 110B, and can support the battery 101, the vibration part 117, the indicator 114, and the like, which are provided inside the housing 110. Here, the first substrate 92 and the second substrate 94 can be PCB substrates.

[0088] In addition, a transmission window 50, through which light irradiated by the light source 20 can be transmitted, can be disposed on the front of the first substrate 92, and the transmission window 50 can be inserted and fixed to the housing head 120.

[0089] The transmission window 50 can include portions in which the transmittance of the irradiated light is different from each other.

[0090] Specifically, the transmission window 50 can be provided such that the transmittance of light in a portion disposed in front of the skin color measurement part 30 is greater than the transmittance of light in a portion disposed in front of the first light source 210 and the second light source 220.

[0091] More specifically, the transmission window 50 can be provided to include a first transmission window 510 disposed in front of the skin color measurement part 30 and the third light source 230, and a second transmission window 520 disposed in front of the first light source 210 and the second light source 220, the first transmission window 510 having a greater transmittance of light than the second transmission window 520.

[0092] For example, the first transmission window 510 can be provided by a transparent window, and the second transmission window 520 can be provided by an opaque window.

[0093] ​The first transmission window 510 is provided as a transparent window, so that light irradiated by the third light source 230 is reflected by the skin, so that it can be easily absorbed by the skin color measuring portion 30.

[0094] In addition, the second transmission window 520 is provided as an opaque window, so that the first light source 210 and the second light source 220 can be shielded.

[0095] In the present embodiment, the case where the first transmission window 510 is provided longer in the one direction is illustrated, but is not limited thereto, as long as light irradiated by the third light source 230 can be incident to the skin color measuring portion 30 after being reflected by the skin, the shape thereof is not limited.

[0096] The transmission window 50 can include a prism sheet that can collect light irradiated by the light source 20, or can be provided by a convex mirror.

[0097] In this case, light emitted by the light source 20 can be collected through the transmission window 50, so that an effect that power consumption of the skin care device 1 can be saved can be shown.

[0098] In addition, the skin care device 1 can further include a vibration portion 117 that can display a plurality of mode states controlled by the control portion by vibration. Among them, the vibration portion 117 can be a haptic motor.

[0099] In addition, the vibration portion 117 can be disposed inside the housing 110, and can be supported by the second substrate 94 or the housing 110.

[0100] In addition, the first contact sensor 60 can be provided on one side of the main body 10.

[0101] The first contact sensor 60, as a sensor that senses contact with the skin, can be provided in a plurality. Specifically, the first contact sensor 60 can be provided at the housing head 120 of the main body 10, and can protrude toward the front end of the housing head 120.

[0102] The control portion 40 can set the skin color of the user measured by the skin color measuring portion 30 as a reference value, and control at least one of the wavelength, intensity, irradiation period, and number of times of light irradiated by the light source 20 through a predetermined algorithm.

[0103] Specifically, the control portion 40 can set a value measured by the skin color measuring portion 30 the Nth time as a reference value, and set a value measured by the skin color measuring portion 30 after the Nth time as a measured value, and control at least one of the wavelength, intensity, and irradiation interval of light of two different wave bands irradiated by the plurality of light sources 20 according to the change rate of the reference value and the measured value.

[0104] For example, when N = 1, the skin cosmetic device 1 can set the skin color value measured by the skin color measurement unit 30 for the first time as a reference value, set the skin color value measured for the second time or later as a measurement value, and control the wavelength, intensity, and irradiation interval of the light irradiated by the light source 20 according to the difference between the reference value and the measurement value. N = 1 is an example, and N can be set to a natural number of 2 or more by the control unit 40.

[0105] When the part contacted for the first time by the skin cosmetic device 1 is a relatively white part such as the lower part of the forearm, and the part contacted for the second time or later is the face (assuming that the face shows a darker skin color than the lower part of the forearm), the light emitted by the first light source 210 and the second light source 220 is simultaneously irradiated to the face from the second time, so that the skin color of the face can be changed to white like the forearm as a standard point.

[0106] In addition, the control unit 40 can control the wavelength, intensity, and irradiation period of the light irradiated by the light source 20 to have a plurality of modes.

[0107] Specifically, the control unit 40 can control the light source 20 to repeat a predetermined number of times a cycle in which the light of the 520 nm to 530 nm band and the light of the 585 nm to 592 nm band are simultaneously irradiated for a certain time, and are not simultaneously irradiated during a certain time.

[0108] In addition, the control unit 40 can control to set the period (pulse period) in which the light of the 520 nm to 530 nm band and the light of the 585 nm to 592 nm band are applied to the skin to be different according to the rate of change of the reference value and the measurement value. The period (pulse period) can be set to a range in which the light is simultaneously irradiated during 100 ms to 1000 ms, and is not simultaneously irradiated during 100 ms to 1000 ms.

[0109] For example, when the rate of change of the reference value and the measurement value measured by the skin color measurement unit 30 is less than a predetermined range, the control unit 40 can control the light source 20 to operate in a first mode that repeats a predetermined number of times a cycle in which the light of the 520 nm to 530 nm band and the light of the 585 nm to 592 nm band are simultaneously irradiated for 100 ms to 400 ms, and are not irradiated during 300 ms to 500 ms.

[0110] In addition, when the rate of change of the reference value and the measurement value measured by the skin color measurement unit 30 is a predetermined range, the control unit 40 can control the light source 20 to operate in a second mode that repeats a predetermined number of times a cycle in which the light of the 520 nm to 530 nm band and the light of the 585 nm to 592 nm band are simultaneously irradiated for 400 ms to 700 ms, and are simultaneously turned off during 300 ms to 500 ms.

[0111] In addition, when the rate of change of the reference value and the measured value is greater than a preset range, the control unit 40 can control the light source 20 to operate in a third mode that repeats a cycle of simultaneously irradiating light in the 520 nm to 530 nm band and light in the 585 nm to 592 nm band for 700 ms to 1000 ms and simultaneously turning off during 300 ms to 500 ms for a preset number of times. Among them, the light in the 520 nm to 530 nm band can be irradiated by the first light source 210, and the light in the 585 nm to 592 nm band can be irradiated by the second light source 220.

[0112] In addition, the above-mentioned cycle (preset number of times) in which the light source 20 is turned on / off can be repeated 15 to 25 times, and can be preferably repeated 20 times.

[0113] In addition, the light irradiated by the first light source 210 and the second light source 220 can be controlled by the control unit 40 to be irradiated at 250 lumens to 350 lumens. Preferably, the light irradiated by the first light source 210 and the second light source 220 by the control unit 40 can be irradiated at 300 lumens.

[0114] In the above-described embodiment, a case in which the cycle in which the light in the 520 nm to 530 nm band and the light in the 585 nm to 592 nm band is applied to the skin is set to be different according to the rate of change is exemplified, but the idea of the present application is not limited thereto, and can include a case in which the intensity of the light is set to be different.

[0115] As another example in which the cycle is set to be different, when the rate of change of the reference value and the measured value measured by the skin color measurement unit 30 is less than a preset range, the control unit 40 can control the light source 20 to operate in a first mode that repeats a cycle of simultaneously irradiating light in the 520 nm to 530 nm band and light in the 585 nm to 592 nm band for 80 ms to 120 ms and not irradiating light during 280 ms to 320 ms for a preset number of times. In addition, when the rate of change of the reference value and the measured value measured by the skin color measurement unit 30 is the preset range, the control unit 40 can control the light source 20 to operate in a second mode that repeats a cycle of simultaneously irradiating light in the 520 nm to 530 nm band and light in the 585 nm to 592 nm band for 180 ms to 220 ms and simultaneously turning off during 280 ms to 320 ms for a preset number of times. In addition, when the rate of change of the reference value and the measured value is greater than the preset range, the control unit 40 can control the light source 20 to operate in a third mode that repeats a cycle of simultaneously irradiating light in the 520 nm to 530 nm band and light in the 585 nm to 592 nm band for 280 ms to 320 ms and simultaneously turning off during 280 ms to 320 ms for a preset number of times.

[0116] As described above, the melanin of the skin can be reduced by controlling the wavelength, intensity, and period of the two lights. In this regard, the experimental results are as follows.

[0117] Table 1

[0118]

[0119] The table 1 illustrates a case where the light source 20 is turned on and off for 100 ms repeatedly 20 times.

[0120] The table 1 shows the experimental results in which the wavelength and intensity of the light irradiated by the light source 20 are set to be different, and the simultaneous irradiation is performed. Here, the horizontal axis indicates the wavelength of the light irradiated by the light source 20 (yellow indicates the irradiation of the second wavelength, green indicates the irradiation of the first wavelength, and yellow + green indicates the case where the first and second wavelengths are simultaneously irradiated), and the vertical axis indicates the intensity of the light irradiated by the light source 20.

[0121] Referring to the table 1, when the first and second wavelengths are simultaneously irradiated at an intensity of 160 lumens (lm) to the skin cells, the melanin reduction is most effective.

[0122] The experiment indicates that the cell experiment, when irradiated to the skin, the epidermis transmittance is 35 to 45%, and thus the optimal intensity of the light source 20 irradiated to the skin can be 250 to 350 lumens (lm).

[0123] The inventors derived the wavelength, intensity, period, and simultaneous irradiation of the light which are most effective for the melanin reduction, which can be embodied by the skin beautifying device 1 of the present embodiment.

[0124] In addition, referring to the table 2, the algorithm in which the light source 20 is operated in multiple modes by the control unit 40 is as follows.

[0125] Table 2

[0126]

[0127]

[0128] Here, R, G, and B of the vertical axis indicate the R, G, and B values which can be measured by the skin color measuring unit 30, and approach 1 to 10 toward the horizontal axis, which represents that the skin color gradually shows a dark color.

[0129] For example, the control unit 40 can control the light source 20 to operate in the first mode when the change rate is less than 15%, to operate in the second mode when the change rate is 15% to 30%, and to operate in the third mode when the change rate is 30% or more.

[0130] The rate of change can be defined as 1 - (measured value / benchmark value).

[0131] For example, when the reference value measured by the skin tone measurement unit 30 is 51,574 (R = 23,651; G = 65,656; B = 51,574; RGB average = 51,574), and the measured value measured by the skin tone measurement unit 30 is 26,524 (R = 12,880; G = 33,346; B = 33,346; RGB average = 26,524), 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.

[0132] The above embodiments illustrate the case where the control unit 40 operates the light source 20 in three modes (first mode, second mode, and third mode). However, the concept of the present invention is not limited to this, and may also include the case where the control unit 40 operates in two or more modes.

[0133] Figure 8 It is a general overview Figure 1 The diagram illustrates the principle of the third light source 230 of the skin beauty device 1 and the principle of skin color measurement by the skin color measuring unit 30.

[0134] refer to Figure 8 The white light irradiated by the third light source 230 passes through the first transmission window 510 and is reflected by the skin before reaching the skin color measuring unit 30.

[0135] Skin color information reaching the skin color measuring unit 30 is transmitted to the control unit 40, which can calculate the aforementioned rate of change. At this time, the housing head 120 can form a dark chamber to prevent light reflected from the skin from leaking out.

[0136] Figure 9 It is shown Figure 1 The sequence diagram of the control method of the skin beauty device 1.

[0137] refer to Figure 9 The method for controlling the skin beauty device 1 is as follows.

[0138] When the user presses button 116, the power supply of the skin beauty device 1 may be turned on (ON) (S10). Then, the following steps can be performed: step S20: skin color is measured by skin color measuring unit 30 and a reference value is set; step S30: skin color is measured by skin color measuring unit 30 and a measured value is set; step S40: the control unit 40 calculates the rate of change between the reference value and the measured value; step S50: based on the rate of change calculated by the control unit 40, at least one of the wavelength, intensity, and irradiation interval of the light irradiated by the light source is controlled so that light of at least two wavelengths irradiates the skin.

[0139] Specifically, the step S20 of setting the reference value by the skin color measuring section 30 measuring the skin color can perform the following process.

[0140] When the second contact sensor 118 contacts the skin of the user (for example, the skin of the hand) and the first contact sensor 60 contacts the skin of the user (for example, the skin of the face), the white light reflected from the skin after the white light is irradiated from the third light source 230 to the skin is incident to the skin color measuring section 30, so that the skin color (the reference value) can be measured.

[0141] When the reference value measurement is performed, the light emitted from the indicator 114 changes, so that the state in the measurement of the skin color can be displayed, and when the reference value measurement is finished, the measurement can be indicated by the vibration of the vibration section 117 or the sound of the sound section (not shown).

[0142] When the reference value measurement is finished, the user contacts the skin care device 1 to other positions of the skin, so that the skin color can be measured by the skin color measuring section 30, and the step S30 of setting the measured value can be performed.

[0143] At this time, similarly, when the second contact sensor 118 contacts the skin of the user (for example, the skin of the hand) and the first contact sensor 60 contacts the skin of the user (for example, the skin of the face), the white light reflected from the skin after the white light is irradiated from the third light source 230 to the skin is incident to the skin color measuring section 30, so that the skin color (the reference value) can be measured.

[0144] Then, the step S40 of calculating the change rate of the reference value and the measured value measured by the skin color measuring section 30 by the control section 40 can be performed.

[0145] As described above, the change rate can be defined as 1-(measured value / reference value).

[0146] Then, the step S50 of controlling at least one of the wavelength, the intensity, and the irradiation interval of the light irradiated by the light source to the skin according to the change rate calculated by the control section 40, so that the light of at least two wavebands can be irradiated to the skin can be performed.

[0147] For example, when the change rate is less than 15%, the control section 40 can control the light source 20 to work in the first mode, when the change rate is 15% to 30%, the control section 40 can control the light source 20 to work in the second mode, and when the change rate is 30% or more, the control section 40 can control the light source 20 to work in the third mode.

[0148] At this time, the first light source 210 and the second light source 220 of the light source 20 are started, so that the light of the first waveband and the second waveband can be irradiated.

[0149] The first mode to the third mode can display the wavelength, intensity, and irradiation interval of the light.

[0150] In addition, in this case, the first mode to the third mode can be activated only when the second contact sensor 118 contacts the skin of the user (e.g., the skin of the hand) and the first contact sensor 60 contacts the skin of the user (e.g., the skin of the face).

[0151] Then, when the user contacts the skin care device 1 to another part of the skin, the measured value of the part can be measured, the change rate can be calculated, and the light source 1 can be controlled to operate in the first mode to the third mode.

[0152] The above process can be repeated, and the user can move the skin care device 1 to a position where the user wants to reduce melanin, and thus use the skin care device 1.

[0153] The above embodiment illustrates an automatic mode in which the first contact sensor 60 contacts the skin after the power is turned on by the button portion 116, and thus the light source 20 automatically operates in the plurality of modes. In addition, the skin care device 1 can include a case in which the button portion 116 is pressed multiple times, and thus the plurality of modes (the first mode to the third mode) are selected.

[0154] As described above, the skin care device 1 of the present embodiment sets the reference value using the value measured on the skin of the user, and thus can change the skin color to the desired skin color of the user. In addition, the wavelength, intensity, irradiation interval, and simultaneous irradiation of the optimal light are controlled, and thus the melanin of the skin can be effectively reduced.

[0155] The above embodiment illustrates a case in which the skin care device 1 that can be held by hand implements the optimal wavelength, intensity, irradiation interval, and simultaneous irradiation of the light, but the idea of the present application is not limited thereto, and can include a case in which the above control (optimal wavelength, intensity, irradiation interval, and simultaneous irradiation of the light) is implemented in a mask care device in which an LED is mounted.

[0156] Hereinafter, the effects of the above skin care device will be described.

[0157] The skin care device 1 of the present embodiment can set the skin color of each user as the reference value, and thus can change the skin color to the desired skin color of the user or the natural skin color suitable for the user.

[0158] In addition, the wavelength, intensity, period (irradiation interval), and simultaneous irradiation of the light that are most effective for reducing melanin can be implemented by the skin care device 1.

[0159] Alternatively, multiple first light sources 210 and second light sources 220 can be configured alternately. As a result, the effect of simultaneously applying light of the first wavelength band irradiated by the first light source 210 and light of the second wavelength band irradiated by the second light source 220 to the skin may be amplified.

[0160] Multiple third light sources 230 can be provided (e.g., two), and the skin color measuring unit 30 can be arranged among multiple third light sources 230. This allows for effective skin color measurement.

[0161] The first transmission window 510 is provided as a transparent window, so that the light irradiated by the third light source 230 is reflected by the skin and can be easily absorbed by the skin color measuring unit 30. The second transmission window 520 is provided as an opaque window, so that the first light source 210 and the second light source 220 can be blocked.

[0162] Additionally, the transmission window 50 may include a prism sheet capable of collecting light emitted by the light source 20, or it may be provided by a convex mirror. In this case, light emitted by the light source 20 can be collected through the transmission window 50, thus demonstrating an effect that saves power consumption of the skin beauty device 1.

[0163] Figure 10 This is a schematic diagram illustrating a transmission window 50' of another embodiment of the present invention.

[0164] The following is for reference. Figure 10 The transmissive window 50' of a skin beauty device according to another embodiment of the present invention is described.

[0165] However, Figure 10 The embodiments illustrated in the figure are Figures 1 to 9 When comparing the embodiments illustrated in the figure, there are differences in the configuration of the transmission window 50', the third light source 230', and the skin color measuring unit 30'. Therefore, the description will focus on the differences, while the description and reference numerals of the above embodiments will be used for the same parts.

[0166] refer to Figure 10 The third light source 230' and the skin color measuring unit 30' can be disposed on one side of the first substrate 92 (e.g., the lower side or the upper side), and the first transmission window 510' can be provided in a form surrounded by the second transmission window 520'.

[0167] Specifically, the first light source 210' and the second light source 220' can be arranged above the third light source 230', and the skin color measuring unit 30' can be arranged between the two third light sources 230'.

[0168] In addition, the transmission window 50' can be provided to include a first transmission window 510' disposed in front of the skin color measuring part 30' and the third light source 230', and a second transmission window 520' disposed in front of the first light source 210' and the second light source 220', the first transmission window 510' having a greater light transmittance than the second transmission window 520'. In addition, the first transmission window 510' can be provided to be smaller than the second transmission window 520'.

[0169] By disposing the first transmission window 510' capable of seeing the first substrate 92 in a small size at the side, and providing the second transmission window 520' capable of blocking the first substrate 92 in a large size, it is possible to improve the aesthetic appearance.

[0170] The skin care device according to the embodiments of the present application and the control method thereof have been described above as specific implementation forms, however, they are examples, the present application is not limited thereto, and should be interpreted to have the broadest scope based on the basic idea disclosed in the present specification. Those skilled in the art can combine, replace, and implement the disclosed implementation forms as patterns of shapes not proposed, however, they are also within the scope of the present application. In addition, it should be clear that those skilled in the art can easily make changes or modifications to the implementation forms disclosed in the present specification, and the changes or modifications also belong to the scope of the present application.

Claims

1. A skin cosmetic device comprising: a main body which is held by a user; a plurality of light sources which are capable of irradiating light of different wavelengths from each other; a skin color measuring section which is capable of measuring a skin color of the user; and a control section which is capable of controlling at least one of an intensity and an irradiation interval of light of two bands different from each other irradiated by the plurality of light sources, according to the skin color measured by the skin color measuring section, the light sources including: a first light source which is capable of irradiating light of a first band; a second light source which is capable of irradiating light of a second band, the first band and the second band having different bands from each other, the first band indicating a 520 nm to 530 nm band, the second band indicating a 585 nm to 592 nm band, the control section being capable of setting a value measured by the skin color measuring section the Nth time as a reference value, setting a value measured by the skin color measuring section after the Nth time as a measured value, controlling at least one of a wavelength, an intensity, and an irradiation interval of light of two bands different from each other irradiated by the plurality of light sources, according to a rate of change of the reference value and the measured value, the control section being capable of controlling as follows, controlling the light sources to repeat, a predetermined number of times, a cycle in which light of the 520 nm to 530 nm band and light of the 585 nm to 592 nm band are simultaneously irradiated for a certain time, and are not simultaneously irradiated during a certain time, controlling, according to the rate of change of the reference value and the measured value, a cycle in which the light of the 520 nm to 530 nm band and the light of the 585 nm to 592 nm band are applied to the skin to be different. the control section being, 2. The skin cosmetic device of claim 1, wherein, when the rate of change of the reference value and the measured value is less than a predetermined range, controlling the light sources to operate in a first mode in which a cycle in which light of the 520 nm to 530 nm band and light of the 585 nm to 592 nm band are simultaneously irradiated for 100 ms to 400 ms, and are not irradiated during 300 ms to 500 ms is repeated a predetermined number of times, when the rate of change of the reference value and the measured value is a predetermined range, controlling the light sources to operate in a second mode in which a cycle in which light of the 520 nm to 530 nm band and light of the 585 nm to 592 nm band are simultaneously irradiated for 400 ms to 700 ms, and are simultaneously turned off during 300 ms to 500 ms is repeated a predetermined number of times, when the rate of change of the reference value and the measured value is greater than a predetermined range, controlling the light sources to operate in a third mode in which a cycle in which light of the 520 nm to 530 nm band and light of the 585 nm to 592 nm band are simultaneously irradiated for 700 ms to 1000 ms, and are simultaneously turned off during 300 ms to 500 ms is repeated a predetermined number of times. the control section being, 3. The skin cosmetic device of claim 2, wherein, when the rate of change is less than 15%, controlling the light sources to operate in the first mode, when the rate of change is 15% to 30%, controlling the light sources to operate in the second mode, when the rate of change is 30% or more, controlling the light sources to operate in the third mode. ​ 4. The skin cosmetic device of claim 2, wherein, The preset number of times can be set to 15 to 25 times. 5.The skin cosmetic device of claim 1, wherein, a second contact sensor is provided on one side of the main body, the control section controls the skin color measurement section to operate only when the second contact sensor is in contact with the skin. 6.The skin cosmetic device of claim 1, wherein, the light source further includes a plurality of third light sources capable of irradiating white light, the skin color measurement section is disposed between the plurality of third light sources.

7. The skin cosmetic device of claim 1, wherein, The first light source and the second light source are alternately disposed. 8.The skin cosmetic device of claim 1, wherein, the light source and the skin color measurement section are mounted on a first substrate, a transmission window through which light irradiated by the light source is transmitted is provided on the front of the first substrate. 9.The skin cosmetic device of claim 8, wherein, the light source includes: a first light source capable of irradiating light of a first waveband; a second light source capable of irradiating light of a second waveband; and a third light source capable of irradiating white light, the transmission window is provided such that the transmittance of light in a portion disposed in front of the skin color measurement section is greater than the transmittance of light in a portion disposed in front of the first light source and the second light source.

10. The skin cosmetic device of claim 9, wherein, The transmission window is provided to include: a first transmission window disposed in front of the skin color measurement section and the third light source; a second transmission window disposed in front of the first light source and the second light source, the first transmission window has a greater transmittance of light than the second transmission window.

11. The skin cosmetic device of claim 9, wherein, The transmission window includes a prism sheet capable of collecting light irradiated by the light source, or is provided by a convex mirror.

12. The skin cosmetic device of claim 1, wherein, The skin color measurement section is provided by an RGB sensor.

13. The skin cosmetic device of claim 1, wherein, The skin cosmetic device further includes: a vibration section capable of displaying a plurality of mode states controlled by the control section by vibration; and a first contact sensor provided on one side of the main body and capable of sensing contact of the skin.

14. The skin cosmetic device of claim 1, wherein, The main body includes: a housing capable of being held by a user, a first opening (S1) in which the first substrate in which the light source is mounted is provided; and a housing head portion located at one end portion of the housing, a second opening (S2) through which light irradiated by the light source is transmitted is provided.

15. The skin cosmetic device of claim 14, wherein, The first substrate in which the light source is mounted is accommodated inside the housing, and the end portion of the housing protrudes more than the light source to prevent light irradiated by the light source from leaking toward the side surface of the housing.

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