Beauty device and method using skin impedance measurement and ultrasonic cross-frequency

Abstract

A beauty device using skin impedance measurement and ultrasonic cross-frequency according to an embodiment of the present invention comprises: an electrical stimulator including an electrode, which transmits a current to the skin of a subject in order to measure the skin impedance of the subject and care for the skin condition of the subject analyzed on the basis of the skin impedance of the subject, and an LED, which irradiates the skin of the subject with light while the current is being transmitted to the skin of the subject; and a cross-frequency ultrasonic stimulator that measures the skin impedance of the subject and is provided with an ultrasonic generator that irradiates the skin of the subject with ultrasonic waves of cross-frequency in order to care for the skin condition of the subject analyzed on the basis of the skin impedance of the subject, wherein the beauty device can apply electrical stimulation, optical stimulation, and ultrasonic stimulation to the skin of the subject.

Description

A cosmetic device and method using skin impedance measurement and ultrasonic cross-frequency

[0001] The present invention relates to a beauty device and method using skin impedance measurement and ultrasonic cross-frequency, and more particularly, to a beauty device and method using skin impedance measurement and ultrasonic cross-frequency, which can measure the skin impedance of a subject receiving the treatment, analyze the skin condition of the subject receiving the treatment based on the skin impedance of the subject receiving the treatment, and transmit and irradiate an electric current, light, and ultrasonic cross-frequency appropriate for caring for the analyzed skin condition of the subject receiving the treatment to the skin of the subject receiving the treatment to provide electrical stimulation, optical stimulation, and ultrasonic stimulation.

[0002] As interest in appearance grows among people of all ages, functional cosmetics are increasingly preferred to maintain healthy and beautiful skin. Furthermore, many people are turning to professional skin care salons for regular skincare. However, due to the financial burden and time constraints associated with salon visits, demand for home skincare, where individuals manage their skin at home, is on the rise. However, most home skincare involves users rubbing skin care devices onto the desired area. However, since most users do not have professional skin care knowledge, excessive skin irritation frequently occurs, which can have negative effects on the skin.

[0003] Furthermore, existing skin care devices utilize vibration, ultrasound, or iontophoresis, or a combination of these methods, to improve the skin condition of the recipient. While these devices are simple in function and operation, they require training in how to use them. Furthermore, the treatment time varies depending on the recipient's skin condition and characteristics, limiting their ability to provide customized results.

[0004] Prior art literature

[0005] Patent documents

[0006] (Patent Document 1) Republic of Korea Patent Publication No. 10-2020-0042294 (published on April 23, 2020)

[0007] Accordingly, the present invention has been made to solve the above problems, and the purpose of the present invention is to provide a beauty device and method using skin impedance measurement and ultrasonic cross-frequency, which can measure the skin impedance of a subject receiving the treatment, analyze the skin condition of the subject receiving the treatment based on the skin impedance of the subject receiving the treatment, and transmit and irradiate an electric current, light, and ultrasonic cross-frequency appropriate for caring for the analyzed skin condition of the subject receiving the treatment to the skin of the subject receiving the treatment to provide electrical stimulation, optical stimulation, and ultrasonic stimulation.

[0008] In addition, the purpose of the present invention is to provide a beauty device and method using skin impedance measurement and ultrasonic cross-frequency, which can simultaneously or sequentially irradiate high-frequency ultrasound that stimulates the surface layer of the skin of a subject and low-frequency ultrasound that stimulates the deep tissue of the skin to the surface layer of the skin and the deep tissue of the skin of a subject.

[0009] And the purpose of the present invention is to provide a cosmetic device and method using skin impedance measurement and ultrasonic cross frequency, which can simultaneously or sequentially irradiate high-frequency and low-frequency ultrasound capable of activating MMPs (Matrix Metalloproteinases) and inducing HSPs (Heat Shock Proteins) to the skin surface layer and deep skin tissue of a subject.

[0010] However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0011] In order to achieve the above object, according to one embodiment of the present invention, a beauty device using skin impedance measurement and ultrasonic cross-frequency comprises: an electric stimulator having an electrode for transmitting current to the skin of a subject in order to measure the skin impedance of the subject and care for the skin condition of the subject analyzed based on the skin impedance of the subject; and an LED for irradiating light to the skin of the subject at the same time as the current is transmitted to the skin of the subject; and a cross-frequency ultrasonic stimulator having an ultrasonic generator for measuring the skin impedance of the subject and irradiating ultrasonic waves of a cross-frequency to the skin of the subject in order to care for the skin condition of the subject analyzed based on the skin impedance of the subject; wherein the beauty device can provide electrical stimulation, optical stimulation, and ultrasonic stimulation to the skin of the subject.

[0012] In addition, the electrode may include an output electrode for measuring the skin impedance of the subject and transmitting current to the skin of the subject; and an input electrode for measuring a voltage generated according to the resistance to the flow of current output from the output electrode.

[0013] And the electric stimulator may include a current generating unit that generates a current to be supplied to the output electrode; a voltage measuring unit that receives a voltage measured from the input electrode; an impedance calculating unit that calculates skin impedance of the subject using the current supplied from the current generating unit and the voltage received from the input electrode by the voltage measuring unit; and a control unit that analyzes the skin condition of the subject based on the skin impedance of the subject calculated by the impedance calculating unit to generate information on the skin condition of the subject, and adjusts a value of a current to be supplied to the skin of the subject from the output electrode and a wavelength of light to be irradiated from the LED to the skin of the subject based on the information on the skin condition of the subject.

[0014] In addition, the cross-frequency ultrasound is a high-frequency ultrasound for stimulating the surface layer of the skin of the subject and a low-frequency ultrasound for stimulating the deep tissue of the skin of the subject, and the cross-frequency ultrasound stimulator can simultaneously or sequentially irradiate the high-frequency ultrasound to the surface layer of the skin of the subject and the low-frequency ultrasound to the deep tissue of the skin of the subject.

[0015] And the cross-frequency ultrasound stimulator comprises: a variable signal generator for measuring the skin composite resistance of the subject including capacitance and generating high-frequency and low-frequency signals; a modulation signal generator for modulating the high-frequency and low-frequency signals generated by the variable signal generator; a modulation unit connected to the variable signal generator and the modulation signal generator for amplifying the high-frequency and low-frequency signals generated by the variable signal generator and modulated by the modulation signal generator; a photocoupler for providing electrical insulation to the modulation unit; a power measurement circuit connected to the modulation unit for measuring a displacement current flowing in a load resistor, which is a resistance when a current passes through the skin of the subject, and analyzing an amplitude of the displacement current; a signal processing unit for calculating the skin impedance of the subject based on the state of the load resistor, analyzing the skin condition of the subject based on the skin impedance of the subject, generating information about the skin condition of the subject, and combining a crossing order and time of a cross-frequency to be irradiated to the skin of the subject based on the information about the skin condition of the subject; It may include an ultrasonic generator that irradiates ultrasonic waves of a cross frequency to the skin of the subject according to the cross order and time combined in the signal processing unit; and an ultrasonic output amplifier that amplifies the high-frequency and low-frequency signals and supplies them to the ultrasonic generator so that ultrasonic waves of a cross frequency according to the cross order and time combined in the signal processing unit are generated from the ultrasonic generator.

[0016] Additionally, the information on the skin condition of the subject may include values ​​obtained by analyzing whether the subject's skin is dry and the thickness of the subject's skin layer.

[0017] Meanwhile, a beauty method using skin impedance measurement and ultrasonic cross-frequency according to an embodiment of the present invention, which is performed by a beauty device using skin impedance measurement and ultrasonic cross-frequency, comprises: a) a step in which an electric stimulator measures skin impedance of a subject through electrodes, or a step in which a cross-frequency ultrasonic stimulator measures skin impedance of the subject; b) a step in which the electric stimulator or the cross-frequency ultrasonic stimulator analyzes a skin condition of the subject based on the skin impedance of the subject; and c) a step in which the electric stimulator transmits an electric current to the skin of the subject through the electrodes to care for the skin condition of the subject, and at the same time as the electric current is transmitted to the skin of the subject, an LED irradiates light to the skin of the subject, or the cross-frequency ultrasonic stimulator irradiates ultrasonic waves of a cross-frequency for care for the skin condition of the subject to the skin of the subject from an ultrasonic generator; wherein the beauty device can provide an electric stimulation, a light stimulation, or an ultrasonic stimulation to the skin of the subject.

[0018] The present invention measures the skin impedance of a subject receiving the treatment, analyzes the skin condition of the subject receiving the treatment based on the skin impedance of the subject receiving the treatment, and transmits and irradiates an electric current, light, and ultrasound of a cross frequency appropriate for caring for the analyzed skin condition of the subject receiving the treatment to the subject receiving the treatment, thereby enabling various skin care by combining electrical stimulation, optical stimulation, and ultrasound stimulation.

[0019] In addition, the present invention can simultaneously or sequentially irradiate the surface layer of the skin and the deep tissue of the skin of the subject with high-frequency ultrasound that stimulates the surface layer of the skin of the subject and low-frequency ultrasound that stimulates the deep tissue of the skin, thereby comprehensively improving the skin condition of the subject.

[0020] In addition, the present invention can comprehensively improve the skin condition of a subject by simultaneously or sequentially irradiating high-frequency and low-frequency ultrasound to the surface layer of the subject's skin and deep skin tissue to activate MMPs (Matrix Metalloproteinases) and induce HSPs (Heat Shock Proteins).

[0021] However, the effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0022] FIG. 1 is a block diagram schematically illustrating a beauty device using skin impedance measurement and ultrasonic cross-frequency according to one embodiment of the present invention.

[0023] Figure 2 is a partial circuit diagram of an electric stimulator according to one embodiment of the present invention.

[0024] FIG. 3 is a block diagram schematically illustrating components of an electric stimulator according to one embodiment of the present invention.

[0025] FIG. 4 is a schematic diagram illustrating a cross-frequency ultrasonic stimulator according to one embodiment of the present invention.

[0026] FIG. 5 is a detailed drawing of a cross-frequency ultrasonic stimulator according to one embodiment of the present invention.

[0027] FIG. 6 and FIG. 7 are diagrams illustrating examples of an ultrasonic irradiation method of a cross-frequency ultrasonic stimulator according to one embodiment of the present invention.

[0028] FIG. 8 is a flowchart illustrating a process of a beauty method using skin impedance measurement and ultrasonic cross-frequency according to one embodiment of the present invention.

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily practice the present invention. However, the description of the present invention is merely an embodiment for structural and functional explanation, and therefore the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiments can be modified in various ways and can have various forms, the scope of the present invention should be understood to include equivalents that can realize the technical idea. In addition, the purposes or effects presented in the present invention do not mean that a specific embodiment must include all of them or only such effects, and therefore the scope of the present invention should not be construed as being limited thereby.

[0030] The meanings of terms described in the present invention should be understood as follows.

[0031] Terms such as "first" and "second" are intended to distinguish one component from another, and the scope of the rights should not be limited by these terms. For example, a first component could be referred to as a second component, and similarly, a second component could also be referred to as a first component. When a component is referred to as being "connected" to another component, it should be understood that it may be directly connected to that other component, but there may also be other components in between. Conversely, when a component is referred to as being "directly connected" to another component, it should be understood that there are no other components in between. Meanwhile, other expressions describing the relationship between components, such as "between" and "immediately between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

[0032] Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as "comprises" or "has" should be understood to specify the presence of stated features, numbers, steps, operations, components, parts, or combinations thereof, but not to exclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0033] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted to be consistent with their meaning within the context of the relevant technology, and should not be interpreted as having ideal or overly formal meanings unless explicitly defined herein.

[0034] Beauty device

[0035] Hereinafter, with reference to the attached drawings, the configuration of a preferred embodiment of a beauty device (100) using skin impedance measurement and ultrasonic cross-frequency according to the present invention will be described in detail.

[0036] FIG. 1 is a block diagram schematically illustrating a beauty device using skin impedance measurement and ultrasonic cross-frequency according to one embodiment of the present invention.

[0037] Referring to FIG. 1, a beauty device (100) using skin impedance measurement and ultrasonic cross-frequency according to one embodiment of the present invention includes an electric stimulator (110) for providing electrical stimulation and optical stimulation to the skin of a subject by current transmission and light irradiation, and a cross-frequency ultrasonic stimulator (120) for providing ultrasonic stimulation to the skin of a subject by cross-frequency ultrasonic waves, and the electric stimulator (110) and the cross-frequency ultrasonic stimulator (120) can analyze the skin condition of the subject based on skin impedance measurement and skin impedance, respectively.

[0038] In addition, the beauty device (100) is a device used by the user, the subject, for skin treatment (home skin care), and the skin of the subject that will receive electrical stimulation, optical stimulation, and ultrasonic stimulation from the beauty device (100) is preferably the face (facial) skin of the subject, but is not limited thereto, and may be the skin of another body part that can receive electrical stimulation, optical stimulation, and ultrasonic stimulation.

[0039] In one embodiment, an electrical stimulator (110) is provided in a beauty device (100) for measuring skin impedance of a subject, and the circuit diagram and components for implementing this are as shown in FIGS. 2 and 3.

[0040] FIG. 2 is a partial circuit diagram of an electric stimulator according to one embodiment of the present invention, and FIG. 3 is a block diagram schematically illustrating components of an electric stimulator according to one embodiment of the present invention.

[0041] Referring to FIG. 3, the electric stimulator (110) of the present invention based on the circuit diagram (110a) of FIG. 2 may be equipped with an electrode (111), a current generation unit (112), a voltage measurement unit (113), an impedance calculation unit (114), an LED (115), a power supply unit (116), a notification unit (117), and a control unit (118) in one embodiment.

[0042] In one embodiment, the electrodes (111) are a plurality of electrodes (e.g., two) forming the outer surface of an electrical stimulator (110) that can be in contact with the skin of the subject, and can be brought into contact with the surface layer of the skin of the subject by the therapist.

[0043] In addition, assuming that the plurality of electrodes (111) are composed of two electrodes, one specific electrode can be an output electrode that transmits the current generated from the current generating unit (112) to the skin of the subject in order to measure the skin impedance of the subject, and the other electrode can be an input electrode that measures the voltage generated according to the resistance (impedance) to the flow of the current output from the output electrode.

[0044] Here, the skin impedance of the subject includes multiple pieces of skin information of the subject, and the multiple pieces of skin information of the subject include information for analyzing the moisture status of the skin, whether the skin barrier function is present, the health status of the skin, the skin type, and whether the skin is aging.

[0045] At this time, the skin impedance may be calculated as low if the subject has skin with high moisture content, and as relatively high if the subject has dry skin.

[0046] In addition, the skin barrier function may be calculated as low as the skin impedance as the electrical resistance of the skin changes when the skin barrier function of the subject's skin is damaged and the skin barrier is weakened, thereby reducing the resistance to external stimuli.

[0047] And the skin health status can be calculated as high skin impedance if the subject's skin has a disease or inflammation.

[0048] Additionally, skin types are typically divided into oily, dry, and combination skin types, and each skin type has its own unique electrical characteristics, so skin impedance can be calculated differently depending on the subject's skin type.

[0049] And skin aging is a phenomenon in which the electrical properties of the skin change with age, and in the case of aged skin, the skin impedance can be calculated to be high.

[0050] In one embodiment, the current generating unit (112) is connected to an output electrode among a plurality of electrodes (111) and can generate a current to be supplied to the output electrode.

[0051] At this time, the intensity and frequency of the current supplied from the current generating unit (112) to the electrode (111) can be controlled through the control unit (118).

[0052] Additionally, the frequency of the current supplied to the electrode (111) by the current generating unit (112) can be set to a high frequency of several MHz or a low frequency of several Hz.

[0053] This current generating unit (112) can transmit current to the electrode (111) to the impedance calculating unit (114).

[0054] In one embodiment, the voltage measuring unit (113) can receive the measured voltage from the input electrode that measures the voltage and then transmit it to the impedance calculating unit (114).

[0055] In one embodiment, the impedance calculation unit (114) can calculate the skin impedance of the subject in conjunction with the current generation unit (112) and the voltage measurement unit (113).

[0056] As a specific example, the impedance calculation unit (114) can calculate the skin impedance of the subject using Ohm's law based on the following [Mathematical Formula 1].

[0057]

[0058] In the above [Mathematical Formula 1], Z represents skin impedance, I represents current transmitted from the current generation unit (112) to the impedance calculation unit (114), and V represents voltage transmitted from the voltage measurement unit (113) to the impedance calculation unit (114).

[0059] In addition, the impedance calculation unit (114) may include a function for calculating the skin impedance of the subject in real time, and for this purpose, it is preferable that the current generation unit (112) and the voltage measurement unit (113) transmit information about current and voltage to the impedance calculation unit (114) in real time.

[0060] In one embodiment, the LED (115) is placed on the outer surface of the electric stimulator (110) and can generate light of a preset wavelength and irradiate it onto the skin of the subject to provide light stimulation to the skin of the subject to improve the skin condition of the subject to be treated based on the skin impedance of the subject to be treated.

[0061] At this time, the color of the light of a preset wavelength generated for optical stimulation from the LED (115) is not limited, but in one embodiment, it may be red (620 to 700 nm), green (525 to 550 nm), blue (450 to 495 nm), or purple (400 to 420 nm).

[0062] In addition, light of a preset wavelength that can be generated from the LED (115) can be irradiated onto the skin of the subject, thereby providing LED therapy to the subject.

[0063] As a specific example, the red wavelength light generated from the LED (115) may be light for providing LED therapy to the recipient according to Anti-aging Care, the green wavelength light may be light for Rejuvenating Care, the blue wavelength light may be light for Calming Care, and the purple wavelength light may be light for Brightening Care.

[0064] And the LED (115) can stop the process of providing light stimulation to the skin of the subject by pausing when the outer surface of the electric stimulator (110) does not come into contact with the skin of the subject.

[0065] In one embodiment, the power supply unit (116) can provide voltages required for the operation of the current generation unit (112), voltage measurement unit (113), impedance calculation unit (114), LED (115), notification unit (117), and control unit (118).

[0066] At this time, the power supply unit (116) receives power from an external source to provide voltage, and can convert the power source, alternating current (AC), into direct current (DC).

[0067] In one embodiment, the notification unit (117) can generate a notification according to the operating status of the current generation unit (112), the voltage measurement unit (113), the impedance calculation unit (114), and the LED (115).

[0068] Here, the term “notification” refers to a signal generated by the notification unit (117) when an event such as non-generation of current by the current generation unit (112), non-measurement of voltage by the voltage measurement unit (113), non-calculation of skin impedance by the impedance calculation unit (114), non-generation of light by the LED (115), or non-supply of power to the power supply unit (116) occurs.

[0069] Additionally, the notification of the notification unit (117) includes a voice-based alarm and light generated (blinking or lighting) from an LED.

[0070] That is, the notification unit (117) can generate a voice-based alarm and light from the LED when an event occurs in at least one of the current generation unit (112), voltage measurement unit (113), impedance calculation unit (114), and LED (115) depending on the operating status.

[0071] Through this notification unit (117), the subject can check whether an event occurs in the electric stimulator (110).

[0072] In one embodiment, the control unit (118) may be a frequency and current control device that regulates the intensity and frequency of the current generated in the current generating unit (112) and then supplied to the output electrode.

[0073] In addition, the control unit (118) is not limited to a device that controls the intensity and frequency of the current to be generated in the current generation unit (112), and although not shown in the drawing, an interface may be provided so that the operator can easily check the operating status of the electric stimulator (110) with the naked eye.

[0074] At this time, the interface of the control unit (118) allows the operator to check whether the electrode (111) is in contact with the surface layer of the skin of the subject and whether an event has occurred in the current generation unit (112), voltage measurement unit (113), impedance calculation unit (114), LED (115), and power unit (116), and to set a notification in the notification unit (117).

[0075] And the control unit (118) can analyze the skin condition of the subject based on the skin impedance of the subject calculated from the impedance calculation unit (114) and generate information about the skin condition of the subject.

[0076] At this time, information on the skin condition of the subject may include the results of analyzing whether the subject's skin is dry and the thickness of the skin layers such as the epidermis, dermis, and subcutaneous fat layer based on the subject's skin impedance.

[0077] In addition, the control unit (118) transmits a first control signal to the current generation unit (112) for controlling the value of the current to be transmitted from the output electrode among the electrodes (111) to the skin of the subject for electrical stimulation based on information about the skin condition of the subject, thereby controlling the value of the current to be transmitted from the output electrode to the skin of the subject.

[0078] That is, the output electrode can provide electrical stimulation to the skin of the subject based on a current appropriately adjusted to care for the skin of the subject, and can be equipped with an electrical stimulator (110) to not only pass current through the skin of the subject to measure the skin impedance of the subject, but also provide electrical stimulation to the surface layer of the skin of the subject.

[0079] This means that the electric stimulator (110) of the present invention is a component that provides stimulation for skin care while simultaneously measuring the impedance of the subject.

[0080] In addition, the electric stimulator (110) can simultaneously provide electric stimulation and light stimulation to the skin of the subject.

[0081] In one embodiment, the output electrode can stop the process of providing electrical stimulation to the skin of the subject by pausing when the outer surface of the electrical stimulator (110) is not in contact with the skin of the subject.

[0082] And the electrical stimulation of the output electrode may be a non-invasive stimulation method based on at least one current transmission method among Electriporation, Micro-current, EMS, and Galvanic.

[0083] Here, Electriporation is an electrical stimulation that creates electrical holes in the cell membrane to promote the penetration of substances into the cells, Micro-current is an electrical stimulation that stimulates the skin and muscles with a very low current of 1㎂ to 1㎃ to promote cell regeneration, muscle tone improvement, and collagen production, EMS (Electrical Muscle Stimulation) is an electrical stimulation that stimulates and contracts muscles to strengthen and rehabilitate muscles, Galvanic is an electrical stimulation that improves the condition of the skin by penetrating ionized substances into the skin with a direct current (DC) current, and Electriporation and Galvanic are also capable of removing waste products and caring for pores.

[0084] That is, electrical stimulation of the output electrode can be a non-invasive stimulation method that delivers current to the skin of the subject to stimulate the pores, cells, and muscles of the subject.

[0085] In addition, the control unit (118) can control the wavelength of light to be irradiated from the LED (115) to the skin of the subject for photo-stimulation by transmitting a second control signal to the LED (115) to control the wavelength of light to be irradiated from the LED (115) to the skin of the subject.

[0086] That is, the LED (115) can provide light stimulation based on light of a wavelength appropriately adjusted to care for the skin of the subject, and it is preferable to provide the light stimulation to the skin of the subject simultaneously with the electrical stimulation.

[0087] In addition, the light stimulation of the LED (115) may be a non-invasive stimulation method for providing the subject with at least one LED therapy effect among Anti-aging Care, Rejuvenating Care, Calming Care, and Brightening Care by irradiating light of a specific wavelength to the skin surface layer of the subject.

[0088] This electric stimulator (110) is not limited to the configuration of one embodiment, and additional components may be provided or some of the components of one embodiment may be deleted.

[0089] In one embodiment, the cross-frequency ultrasound stimulator (120) can analyze the skin condition of the subject based on the skin impedance of the subject, and can irradiate the skin of the subject with ultrasound of a cross-frequency appropriate for caring for the skin condition of the subject in order to provide ultrasound stimulation to the skin of the subject.

[0090] At this time, a cross-frequency ultrasound stimulator (120) may be configured with a circuit based on the components shown in FIGS. 4 and 5 to analyze the skin condition of the subject and irradiate the cross-frequency ultrasound to the subject's skin.

[0091] FIG. 4 is a schematic diagram illustrating a cross-frequency ultrasonic stimulator according to one embodiment of the present invention, and FIG. 5 is a detailed diagram illustrating a cross-frequency ultrasonic stimulator according to one embodiment of the present invention.

[0092] Referring to FIGS. 4 and 5, a cross-frequency ultrasonic stimulator (120) may be equipped with a variable signal generator (121), a modulation signal generator (122), a modulation unit (123), a photocoupler (124), a power measurement circuit (125), a signal processing unit (126), an ultrasonic output amplifier (127), and an ultrasonic generator (128) in one embodiment.

[0093] In one embodiment, the variable signal generator (121) measures the skin composite resistance of the subject including capacitance, and is configured in the circuit of the cross-frequency ultrasound stimulator (120) to generate high-frequency and low-frequency signals.

[0094] At this time, the synthetic resistance of the skin refers to the total resistance that takes into account not only the skin of the subject, but also the interaction with the tissues and cell membranes of the subject.

[0095] In addition, the reason why the skin composite resistance of the subject is measured by the variable signal generation unit (121) is because the skin impedance (a combination of resistance and capacitance), which is an electrical characteristic of the surface layer (epidermis and dermis) of the subject's skin and the deep tissue (dermis and subcutaneous tissue) of the subject's skin, is measured differently, and therefore the energy transfer efficiency according to the ultrasound irradiation varies depending on the skin impedance.

[0096] That is, the variable signal generation unit (121) measures the synthetic resistance of the skin of the subject in order to maximize the efficiency of transmitting the energy of the ultrasound irradiated to the surface layer (epidermis and dermis) and deep skin tissue (dermis and subcutaneous tissue) of the subject's skin from the cross-frequency ultrasound stimulator (120), and the cross-frequency ultrasound stimulator (120) can irradiate the subject's skin with the ultrasound of the cross-frequency of the band that matches the skin impedance of the subject.

[0097] In the present invention, cross-frequency means a combination of high-frequency ultrasound for stimulating the surface layer of the skin of the subject and low-frequency ultrasound for stimulating the deep tissue of the skin.

[0098] Accordingly, the variable signal generation unit (121) refers to a component for generating high-frequency and low-frequency ultrasonic waves in one embodiment, and may be composed of a first variable signal generation unit (121a) and a second variable signal generation unit (121b) for generating high-frequency and low-frequency ultrasonic waves.

[0099] In one embodiment, the first variable signal generating unit (121a) and the second variable signal generating unit (121b) can each generate a high-frequency signal.

[0100] In addition, when the high-frequency signals generated by the first variable signal generator (121a) and the second variable signal generator (121b) interfere with each other, the low-frequency signal corresponding to the difference between frequencies, i.e., the beat frequency, can be generated.

[0101] In one embodiment, the modulation signal generator (122) is an analog voltage signal generator composed of a low-pass filter (LPF) composed of a resistor and a capacitor, and can be configured in the circuit of the cross-frequency ultrasonic stimulator (120) to modulate high-frequency and low-frequency signals generated from the variable signal generator (121a, 121b).

[0102] In addition, the modulation signal generation unit (122) may be composed of a first modulation signal generation unit (122a) for modulating a high-frequency signal generated from a first variable signal generation unit (121a), and a second modulation signal generation unit (122b) for modulating a low-frequency signal generated from a second variable signal generation unit (121b).

[0103] And the modulation signal generation unit (122a, 122b) can modulate not only high-frequency ultrasonic waves, but also low-frequency signals generated by mutual interference of high-frequency signals generated from the first variable signal generation unit (121a) and the second variable signal generation unit (121b).

[0104] In addition, the modulation signal generation unit (122a, 122b) can remove the high frequency component of the pulse width modulation signal (PWM) transmitted from the microcontroller of the signal processor (126) to modulate the high frequency and low frequency ultrasonic signals, and pass only the low frequency component to the modulation unit (123).

[0105] Here, the pulse width modulation signal refers to a digital signal that turns the voltage on / off at high speed, and can be converted (output) into an analog voltage signal when passed through a low-pass filter.

[0106] Additionally, the analog voltage signal can be used to modulate high-frequency and low-frequency signals generated from the variable signal generators (121a, 122b), respectively.

[0107] In one embodiment, the modulation unit (123) may be configured in the circuit of the cross-frequency ultrasonic stimulator (120) to amplify high-frequency and low-frequency signals modulated by the modulation signal generator (122a, 122b) as a displacement current generator for supplying an appropriate displacement current to the skin surface layer and deep skin tissue of the subject.

[0108] In addition, the modulation unit (123) may be composed of a first modulation unit (123a) connected to the first variable signal generation unit (121a) and the first modulation signal generation unit (122a) to amplify high-frequency and low-frequency signals generated in the first variable signal generation unit (121a) and then modulated by the first modulation signal generation unit (122a), and a second modulation unit (123b) connected to the second variable signal generation unit (121b) and the second modulation signal generation unit (122b) to amplify high-frequency and low-frequency signals generated in the second variable signal generation unit (121b) and then modulated by the second modulation signal generation unit (122b).

[0109] And the modulation unit (123a, 123b) can modulate the high-frequency and low-frequency signals generated by the variable signal generation unit (121a, 122b), respectively, like the modulation signal generation unit (122a, 122b), by controlling the amount of displacement current to be supplied to the skin surface layer and deep skin tissue of the subject.

[0110] At this time, the displacement current includes a certain amount of capacitance as the skin of the subject acts as a load with impedance, and refers to the current flowing through the skin of the subject through this capacitance.

[0111] In one embodiment, a photocoupler (124) may be configured in the circuit of the cross-frequency ultrasonic stimulator (120) in a form connected to the first modulation unit (123a) and the second modulation unit (123b) to provide electrical insulation to the modulation units (123a, 123b) so that the peak value of the displacement current in the modulation units (123a, 123b) is accurately measured.

[0112] In one embodiment, the power measurement circuit (125) may be configured in the circuit of the cross-frequency ultrasonic stimulator (120) in a form connected to the modulation unit (123a, 123b) to measure the displacement current flowing in the load resistor and analyze the amplitude of the displacement current.

[0113] This power measurement circuit (125) can be configured through a shunt resistor ('SHURNT-R' in FIG. 5), a rectifier ('D' in FIG. 5), and a low-pass filter ('R', 'C' in FIG. 5).

[0114] In one embodiment, the shunt resistor refers to a resistor used to measure the displacement current flowing in the load resistor.

[0115] In one embodiment, the rectifier can convert the displacement current, which is an alternating current (AC) signal, into a direct current (DC) signal.

[0116] In one embodiment, the low-pass filter can extract the envelope of high-frequency and low-frequency ultrasound waves that have passed through the modulation unit (123a, 123b).

[0117] At this time, the envelope of high-frequency and low-frequency ultrasonic waves is a curve representing the amplitude change of high-frequency and low-frequency ultrasonic waves, and includes the peak current, which is the modulated maximum amplitude of the high-frequency and low-frequency ultrasonic waves signals.

[0118] Additionally, the envelope of high-frequency and low-frequency ultrasound refers to data that visually represents how the output of ultrasound from the cross-frequency ultrasound stimulator (120) changes over time.

[0119] And the load resistance, which is the target of the power measurement circuit (125) to measure displacement current and analyze the amplitude of displacement current, means the resistance when the current passes through the skin of the subject.

[0120] In one embodiment, the signal processing unit (126) calculates the skin impedance of the subject based on the state of the load resistance, and can analyze the skin condition of the subject based on the calculated skin impedance of the subject.

[0121] In addition, the signal processing unit (126) can analyze the skin condition of the subject and generate information about the skin condition of the subject.

[0122] *Here, the information on the skin condition of the subject generated by the signal processing unit (126) may include the results of analyzing the dryness of the subject's skin and the thickness of the skin layers such as the epidermis, dermis, and subcutaneous fat layer based on the skin impedance of the subject, similar to the control unit (118).

[0123] And, the signal processing unit (126) can combine the crossover order and time of the crossover frequency appropriate for caring for the skin of the subject according to the skin condition of the subject based on information about the skin condition of the subject.

[0124] At this time, cross-frequency refers to a combination of high-frequency ultrasound to stimulate the surface layer of the skin of the subject and low-frequency ultrasound to stimulate the deep tissue of the skin.

[0125] Additionally, the cross-order of the cross-frequency means the order in which high-frequency ultrasound and low-frequency ultrasound are irradiated to the skin of the subject simultaneously or sequentially.

[0126] And the time of the cross frequency refers to the irradiation time of high-frequency ultrasound and low-frequency ultrasound to be irradiated to the skin of the subject from the ultrasound generator (128).

[0127] This signal processing unit (126) can be configured in the circuit of the cross-frequency ultrasonic stimulator (120) in a form connected to the power measurement circuit (125) to control the operation of the ultrasonic output amplifier (127) and the ultrasonic generator (128) so that ultrasonic waves of an appropriate cross-frequency are irradiated to the skin surface layer and deep skin tissue of the subject according to the skin condition of the subject.

[0128] Here, the fact that an appropriate cross-frequency ultrasound is irradiated according to the skin condition of the subject means that when the signal processing unit (126) analyzes that the skin condition of the subject requires collagen production in the surface layer of the subject's skin, high-frequency ultrasound generated from the ultrasound generating unit (128) is irradiated to the surface layer of the subject's skin, and on the other hand, when the signal processing unit (126) analyzes that the skin condition of the subject requires pain relief (inflammation) or blood flow promotion in the deep tissue of the subject's skin, low-frequency ultrasound generated from the ultrasound generating unit (128) is irradiated to the deep tissue of the subject's skin.

[0129] In one embodiment, the signal processing unit (126) may be configured through an analog-to-digital converter ('ADC1', 'ADC2' in FIG. 5) and a microcontroller (MCU).

[0130] At this time, the analog-to-digital converter can convert the value of the envelope including the peak current, which is an analog signal, into a digital signal.

[0131] A microcontroller can process digital signals converted from an analog-to-digital converter and perform calculation and control tasks.

[0132] More specifically, the microcontroller can determine the state of the load resistor based on the digital signal from the analog-to-digital converter.

[0133] In addition, the microcontroller can control the operation of the ultrasonic output amplifier (127) and the ultrasonic generator (128) so that ultrasonic waves of an appropriate cross frequency are irradiated to the skin surface layer and deep skin tissue of the subject according to the condition of the subject's skin analyzed through the state of the load resistance and the skin impedance of the subject.

[0134] Here, the microcontroller of the signal processing unit (126) controls the operation of the ultrasonic generator (128), which means setting the type, cycle, output intensity, etc. of the ultrasonic waves to be irradiated to the skin of the subject.

[0135] In one embodiment, the ultrasonic output amplifier (127) is an RF amplifier (Radio Frequency Amplifier) ​​that amplifies and supplies high-frequency and low-frequency signals, which are electrical signals, to the ultrasonic generator (128) so that ultrasonic waves of a cross-frequency according to the cross-order and time of the cross-frequency combined by the signal processing unit (126) are generated from the ultrasonic generator (128), and can be configured in the circuit of the cross-frequency ultrasonic stimulator (120) in a form connected to the signal processing unit (126).

[0136] In one embodiment, the ultrasonic generator (128) is a transducer (TD) that converts high-frequency signals and low-frequency signals, which are electrical signals transmitted from the ultrasonic output amplifier (127), into physical ultrasonic waves, and can be configured in the circuit of the cross-frequency ultrasonic stimulator (120) in a form connected to the ultrasonic output amplifier (127).

[0137] In addition, the ultrasonic generator (128) can generate high-frequency ultrasound and low-frequency ultrasound by converting an electrical signal into mechanical vibration, and then irradiate high-frequency ultrasound to the surface layer of the skin of the subject and low-frequency ultrasound to the deep tissue of the skin of the subject.

[0138] And, although not shown in the drawing, the ultrasonic generator (127) may be composed of a first ultrasonic generator (not shown) that receives a high-frequency signal from an ultrasonic output amplifier (127) and generates high-frequency ultrasonic waves, and a second ultrasonic generator (not shown) that receives a low-frequency signal from an ultrasonic output amplifier (127) and generates low-frequency ultrasonic waves.

[0139] In addition, although the ultrasonic generator (127) has been described as irradiating both high-frequency ultrasound and low-frequency ultrasound to the skin of the subject, at least one of high-frequency ultrasound and low-frequency ultrasound may be irradiated to the skin of the subject so as to improve the skin condition of the subject according to the skin condition of the subject analyzed by the signal processing unit (126).

[0140] The method by which this ultrasonic generator (127) irradiates ultrasonic waves of cross frequency to the skin of the subject is as shown in FIGS. 6 and 7.

[0141] FIG. 6 and FIG. 7 are diagrams illustrating examples of an ultrasonic irradiation method of a cross-frequency ultrasonic stimulator according to one embodiment of the present invention.

[0142] Referring to FIG. 6, the ultrasonic generator (128) converts high-frequency signals and low-frequency signals, which are electrical signals transmitted from the ultrasonic output amplifier (127), into mechanical vibrations to generate high-frequency ultrasonic waves (1200a) and low-frequency ultrasonic waves (1200b), and then, in the signal processing unit (126), the high-frequency ultrasonic waves (1200a) and low-frequency ultrasonic waves (1200b) can be simultaneously irradiated to the skin of the subject according to the crossover order and time of the crossover frequencies combined.

[0143] Here, the high-frequency ultrasound (1200a) and the low-frequency ultrasound (1200b) actually have a significant difference in frequency bands, as the band of the high-frequency ultrasound (1200a) is from about 1 MHz to 100 MHz or more, and the band of the low-frequency ultrasound (1200b) is from about 20 kHz to 1 MHz (1,000 kHz). However, for the convenience of explanation, it will be explained assuming that they are in close or identical frequency bands, as shown in FIGS. 6 and 7.

[0144] When comparing high-frequency ultrasound (1200a) and low-frequency ultrasound (1200b), high-frequency ultrasound (1200a) has a shorter wavelength than low-frequency ultrasound (1200b), and low-frequency ultrasound (1200b) has a lower frequency than high-frequency ultrasound (1200a), so it can have a longer wavelength.

[0145] These high-frequency ultrasound waves (1200a) can stimulate the surface layer of the skin of the subject when irradiated onto the skin of the subject through the ultrasound generator (128), and low-frequency ultrasound waves (1200b) can stimulate the deep tissue of the skin when irradiated onto the skin of the subject through the ultrasound generator (128).

[0146] Referring to FIG. 7, the ultrasonic generator (128) converts high-frequency signals and low-frequency signals, which are electrical signals transmitted from the ultrasonic output amplifier (127), into mechanical vibrations to generate high-frequency ultrasonic waves (1200a) and low-frequency ultrasonic waves (1200b), and then, in the signal processing unit (126), the high-frequency ultrasonic waves (1200a) and low-frequency ultrasonic waves (1200b) can be sequentially irradiated to the skin of the subject according to the crossover order and time of the crossover frequencies combined.

[0147] At this time, the fact that the ultrasonic generator (128) sequentially irradiates high-frequency ultrasonic waves and low-frequency ultrasonic waves means a method of irradiating the skin of the subject with high-frequency ultrasonic waves (1200a) and then irradiating the skin of the subject with low-frequency ultrasonic waves (1200b) when the irradiation of high-frequency ultrasonic waves (1200a) is completed, as shown in (a) of FIG. 7, or a method of irradiating the skin of the subject with high-frequency ultrasonic waves (1200a) and low-frequency ultrasonic waves (1200b) alternately and repeatedly every cycle, as shown in (b) of FIG. 7.

[0148] At this time, the ultrasound irradiation method illustrated in (a) of FIG. 7 is not limited to irradiating the skin of the subject with high-frequency ultrasound (1200a) first and then irradiating the skin of the subject with low-frequency ultrasound (1200b), and it is preferable to understand that at least one of the high-frequency ultrasound (1200a) and low-frequency ultrasound (1200b) is irradiated first and then the other ultrasound is irradiated.

[0149] When the signal processing unit (126) analyzes the skin condition of the subject to be treated as being dry and thus in need of skin layer care, the ultrasonic stimulation of the ultrasonic generator (128) may irradiate the skin of the subject to be treated with ultrasonic waves of a preset high frequency (e.g., 10 to 23 MHz) appropriate for skin layer care in alternating order and time, depending on whether the skin is dry and the thickness of the skin layer included in the information about the skin condition of the subject to be treated generated by the signal processing unit (126), or, when the skin layer is thick, ultrasonic waves of a low frequency may be irradiated to the skin of the subject to be treated.

[0150] As such, the beauty device (100) of the present invention measures the skin impedance of the subject and analyzes the skin condition of the subject based on the skin impedance of the subject, and transmits and irradiates appropriate current, light, and ultrasound of a cross frequency to the skin of the subject according to the analyzed skin condition of the subject, thereby enabling various skin care by combining electrical stimulation, optical stimulation, and ultrasound stimulation.

[0151] In addition, the beauty device (100) of the present invention can simultaneously or sequentially irradiate the surface layer of the skin and the deep tissue of the skin of the subject with high-frequency ultrasound that stimulates the surface layer of the skin of the subject and low-frequency ultrasound that stimulates the deep tissue of the skin, thereby comprehensively improving the skin condition of the subject.

[0152] And the beauty device (100) of the present invention can comprehensively improve the skin condition of the subject by irradiating high-frequency and low-frequency ultrasound simultaneously or sequentially to the skin surface layer and deep skin tissue of the subject to be treated, thereby activating MMPs (Matrix Metalloproteinases) and inducing HSPs (Heat Shock Proteins).

[0153] At this time, the role of MMPs is as an enzyme that breaks down extracellular matrix (ECM) components such as collagen, and plays an important role in tissue restructuring, wound healing, and inflammatory response. It can be expressed through thermal stimulation by ultrasound to break down old collagen and promote the production of new collagen, thereby promoting skin regeneration and recovery.

[0154] In addition, HSPs play an important role in the cellular stress response, being involved in protein folding, cell protection, and damage repair. They are expressed through thermal stimulation by ultrasound to strengthen the cellular stress response, promoting the repair and regeneration of damaged proteins, and promoting the survival of skin cells, thereby improving skin health and promoting collagen synthesis to maintain skin elasticity and structure.

[0155] Beauty method

[0156] Hereinafter, with reference to the attached drawings, a preferred process of skin impedance measurement performed by the beauty device (100) of the present invention and a beauty method (S100) using ultrasonic cross-frequency will be described in detail.

[0157] FIG. 8 is a flowchart illustrating a process of a beauty method using skin impedance measurement and ultrasonic cross-frequency according to one embodiment of the present invention.

[0158] Referring to FIG. 8, a beauty method (S100) according to one embodiment of the present invention may proceed in the following order: a skin impedance measurement step (S110), a skin condition analysis step (S120), and a stimulus delivery step (S130).

[0159] The above skin impedance measurement step (S110) may be a step in which a beauty device (100) operated by a user, i.e., a subject of treatment, measures the skin impedance of the subject of treatment through an electric stimulator (110) or a cross-frequency ultrasonic stimulator (120).

[0160] In the above skin impedance measurement step (S110), the electric stimulator (110) can calculate the skin impedance of the subject in the impedance calculation unit (114), and the cross-frequency ultrasonic stimulator (120) can calculate the skin impedance of the subject in the signal processing unit (126).

[0161] In addition, in the skin impedance measurement step (S110), measuring the skin impedance of the subject using an electric stimulator (110) is intended to simultaneously provide electrical stimulation and optical stimulation by transmitting current and irradiating light to the skin of the subject, and measuring the skin impedance of the subject using a cross-frequency ultrasonic stimulator (120) is intended to provide ultrasonic stimulation by irradiating cross-frequency ultrasonic waves to the skin of the subject.

[0162] The above skin condition analysis step (S120) may be a step in which an electric stimulator (110) or a cross-frequency ultrasonic stimulator (120) analyzes the skin condition of the subject based on the skin impedance of the subject.

[0163] In the above skin impedance measurement step (S110), the electric stimulator (110) can analyze the skin condition of the subject in the control unit (118), and the cross-frequency ultrasonic stimulator (120) can analyze the skin condition of the subject in the signal processing unit (126).

[0164] The above stimulation delivery step (S130) may be a step in which an electric stimulator (110) or a cross-frequency ultrasonic stimulator (120) provides stimulation appropriate for caring for the skin condition of the subject.

[0165] In the above stimulation transmission step (S130), the electric stimulator (110) can simultaneously provide electrical stimulation and light stimulation by transmitting and irradiating an appropriate current and light to the skin of the subject to care for the skin condition of the subject analyzed through the dryness of the skin and the thickness of the skin layer based on the output electrode and LED (115).

[0166] In the above stimulation transmission step (S130), the cross-frequency ultrasonic stimulator (120) can provide ultrasonic stimulation by irradiating the skin of the subject with ultrasonic waves of a cross-frequency appropriate for caring for the skin condition of the subject analyzed through the dryness of the subject's skin and the thickness of the skin layer based on the ultrasonic generator (128).

[0167] That is, in the above-mentioned stimulus delivery step (S130), the beauty device (100) can provide electrical stimulation and optical stimulation to the skin of the subject, or can provide ultrasonic stimulation to the skin of the subject. However, the beauty device (100) can also provide electrical stimulation, optical stimulation, and ultrasonic stimulation simultaneously through a design change.

[0168] The detailed description of the preferred embodiments of the present invention disclosed above has been provided to enable those skilled in the art to implement and practice the present invention. While the above description has been made with reference to preferred embodiments of the present invention, those skilled in the art will appreciate that various modifications and variations can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art can utilize the individual components described in the above-described embodiments in combination with each other. Accordingly, the present invention is not intended to be limited to the embodiments described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0169] The present invention may be embodied in other specific forms without departing from the technical spirit and essential characteristics thereof. Therefore, the above detailed description should not be construed as limiting in all respects but should be considered illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all changes coming within the equivalent scope of the present invention are intended to be included therein. The present invention is not intended to be limited to the embodiments set forth herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Furthermore, claims that are not explicitly cited in the claims may be combined to form an embodiment or incorporated into a new claim by post-application amendment.

[0170] Description of the symbol

[0171] 100: Beauty device, 110: Electrical stimulator,

[0172] 110a: Circuit diagram of electric stimulator, 111: Electrode,

[0173] 112: Current generation unit, 113: Voltage measurement unit,

[0174] 114: Impedance calculation unit, 115: LED,

[0175] 116: Power supply, 117: Notification unit,

[0176] 118: Control unit, 120: Cross-frequency ultrasonic stimulator,

[0177] 121: variable signal generator, 121a: first variable signal generator,

[0178] 121b: Second variable signal generator, 122: Modulation signal generator,

[0179] 122a: first modulation signal generator, 122b: second modulation signal generator,

[0180] 123: modulation unit, 123a: first modulation unit,

[0181] 123b: Second modulation unit, 124: Photocoupler,

[0182] 125: Power measurement circuit, 126: Signal processing unit,

[0183] 127: Ultrasonic output amplifier, 128: Ultrasonic generator.

Claims

1. In the beauty device, An electrical stimulator equipped with an electrode that transmits current to the skin of the subject to care for the skin condition of the subject to be treated based on the measurement of the skin impedance of the subject to be treated and the analysis of the skin impedance of the subject to be treated, and an LED that irradiates light to the skin of the subject to be treated while the current is transmitted to the skin of the subject to be treated; and A cross-frequency ultrasound stimulator having an ultrasound generator that measures the skin impedance of the subject and irradiates cross-frequency ultrasound to the skin of the subject to care for the skin condition of the subject analyzed based on the skin impedance of the subject; The above beauty device, A beauty device using skin impedance measurement and ultrasonic cross-frequency, characterized in that it provides electrical stimulation, optical stimulation, and ultrasonic stimulation to the skin of the subject.

2. In paragraph 1, The above electrodes are, Measurement of the skin impedance of the subject and an output electrode for transmitting current to the skin of the subject; and A beauty device using skin impedance measurement and ultrasonic cross-frequency, characterized by including an input electrode that measures a voltage generated according to resistance to the flow of current output from the output electrode.

3. In paragraph 2, The above electric stimulator, A current generating unit that generates a current to be supplied to the output electrode; A voltage measuring unit that receives a voltage measured from the input electrode; An impedance calculation unit that calculates the skin impedance of the subject using the current supplied from the current generation unit and the voltage received from the input electrode by the voltage measurement unit; and A beauty device using skin impedance measurement and ultrasonic cross-frequency, characterized in that it includes a control unit that analyzes the skin condition of the subject based on the skin impedance of the subject calculated by the impedance calculation unit to generate information about the skin condition of the subject, and adjusts the value of the current to be transmitted from the output electrode to the skin of the subject and the wavelength of light to be irradiated from the LED to the skin of the subject based on the information about the skin condition of the subject.

4. In paragraph 3, Information about the skin condition of the above subject includes: A beauty device using skin impedance measurement and ultrasonic cross-frequency, characterized in that it includes values ​​analyzing whether the subject's skin is dry and the thickness of the subject's skin layer.

5. In paragraph 1, The above cross-frequency ultrasound is, High-frequency ultrasound for stimulating the surface layer of the skin of the subject, and low-frequency ultrasound for stimulating the deep tissue of the skin of the subject. The above cross-frequency ultrasound stimulator, A beauty device using skin impedance measurement and ultrasonic cross-frequency, characterized in that the high-frequency ultrasound is irradiated simultaneously or sequentially to the surface layer of the skin of the subject and the low-frequency ultrasound is irradiated simultaneously or sequentially to the deep tissue of the skin of the subject.

6. In paragraph 5, The above cross-frequency ultrasound stimulator, A variable signal generator for measuring the skin synthetic resistance of the subject including capacitance and generating high-frequency and low-frequency signals; A modulation signal generation unit that modulates high-frequency and low-frequency signals generated from the above variable signal generation unit; A modulation unit connected to the variable signal generation unit and the modulation signal generation unit, and amplifying high-frequency and low-frequency signals generated by the variable signal generation unit and modulated by the modulation signal generation unit; A photocoupler for providing electrical insulation to the above modulation unit; A power measurement circuit connected to the modulation unit to measure displacement current flowing through a load resistor, which is a resistance when current passes through the skin of the subject, and to analyze the amplitude of the displacement current; A signal processing unit that calculates the skin impedance of the subject based on the state of the load resistance, analyzes the skin condition of the subject based on the skin impedance of the subject, generates information about the skin condition of the subject, and combines the crossing order and time of the crossing frequency to be irradiated to the skin of the subject based on the information about the skin condition of the subject; An ultrasonic generator that irradiates ultrasonic waves of a cross frequency to the skin of the subject according to the cross order and time combined in the signal processing unit; and A beauty device using skin impedance measurement and ultrasonic crossover frequency, characterized in that it includes an ultrasonic output amplifier that amplifies the high-frequency and low-frequency signals and supplies them to the ultrasonic generator so that ultrasonic waves of a crossover frequency according to a combined crossover order and time in the signal processing unit are generated from the ultrasonic generator.

7. In paragraph 6, Information about the skin condition of the above subject includes: A beauty device using skin impedance measurement and ultrasonic cross-frequency, characterized in that it includes values ​​analyzing whether the subject's skin is dry and the thickness of the subject's skin layer.

8. In a beauty method performed by a beauty device, a) a step in which an electrical stimulator measures the skin impedance of a subject through electrodes, or a cross-frequency ultrasound stimulator measures the skin impedance of the subject; b) a step of analyzing the skin condition of the subject based on the skin impedance of the subject using the electric stimulator or the cross-frequency ultrasonic stimulator; and c) a step in which the electric stimulator transmits current to the skin of the subject from the electrode to care for the skin condition of the subject, and at the same time as the current is transmitted to the skin of the subject, light is irradiated to the skin of the subject from the LED, or the cross-frequency ultrasonic stimulator irradiates ultrasonic waves of a cross-frequency for caring for the skin condition of the subject from the ultrasonic generator to the skin of the subject; The above beauty device, A cosmetic method using skin impedance measurement and ultrasonic cross-frequency, characterized by providing electrical stimulation, optical stimulation, and ultrasonic stimulation to the skin of the subject.

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