Skin treatment device and control method for remodeling facial shape using multi-frequency RF energy

Abstract

To provide a skin treatment apparatus for remodeling the face shape using multi-frequency RF energy and a control method thereof for performing skin treatment using the RF energy having various frequencies different in RF energy delivery depth in tissue.SOLUTION: A skin treatment apparatus for remodeling the face shape using RF energy comprises: a main body comprising an RF generator and an RF modulator; a handpiece connected to the main body, and comprising an electrode at one side to allow the RF energy received from the main body to be delivered to skin; and a controller controlling the RF modulator to allow the RF energy having multiple frequencies to be delivered.SELECTED DRAWING: Figure 2

Description

Technical Field

[0006] ,

[0007] , ,

[0001] The present invention relates to a skin treatment device for remodeling a face shape using multi - frequency RF energy and a control method thereof.

Background Art

[0002] Devices for transmitting RF energy to tissues for treatment purposes have been developed in various ways. In particular, recently, devices that cause appropriate modifications to the skin using RF energy and exhibit a skin treatment effect through tissue regeneration have been developed.

[0003] Regarding conventional treatment devices using RF energy, Korean Registered Patent No. 0706155 is disclosed. Such conventional devices have a problem in that they treat the skin using RF energy of a fixed frequency and have low treatment efficiency.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to solve the above - mentioned conventional problems, an object of the present invention is to provide a skin treatment device for remodeling a face shape using multi - frequency RF energy capable of adjusting the frequency of RF energy corresponding to the depth and temperature of tissues and a control method thereof.

Means for Solving the Problems

[0006] As a means for solving the above problems, a treatment device using RF energy capable of adjusting the RF energy to a multi - frequency and transmitting the RF energy may be provided during one treatment.

[0007] On the other hand, multi-frequency RF energy can include at least three frequencies with different heating depths within the tissue.

[0008] Furthermore, RF energy can be delivered to the tissue by a pulse train, which can adjust the frequency of the RF energy, which is selected based on at least one of the following: treatment duration, tissue temperature, and treatment mode.

[0009] Furthermore, the present invention may provide a control method for a skin treatment device for remodeling facial features using multi-frequency RF energy.

[0010] Furthermore, the present invention may provide a method for remodeling the face shape by configuring a pulsed train with different heating depths within the skin tissue at different frequencies, and transmitting RF energy to the tissue via the pulsed train. On the other hand, the method for remodeling the face shape can improve treatment efficiency by adjusting the frequency at which RF energy is transmitted to the epidermis, dermis, and adipose layer based on at least one of the treatment duration, tissue or skin surface temperature, and treatment mode. [Effects of the Invention]

[0011] The skin treatment device for remodeling facial shape using multi-frequency RF energy according to the present invention, its control method, and the method for remodeling facial shape using the same have the effect of remodeling facial shape by denaturing the epidermis and dermis with RF energy to induce regeneration that generates new collagen fibers, and by killing fat cells with RF energy. [Brief explanation of the drawing]

[0012] [Figure 1] This is a block diagram showing the configuration of a skin treatment device for remodeling facial shape using multi-frequency RF energy according to the first embodiment of the present invention. [Figure 2]This figure shows the region of skin tissue that is heated by the frequency of the RF energy selected in the first embodiment. [Figure 3] This figure shows an example of a pulsed RF energy train according to the first embodiment. [Figure 4] In the first embodiment, this graph shows the heating phase and hold phase during RF energy transfer, depending on the tissue temperature. [Figure 5] This figure shows the RF energy pulse train, tissue temperature, and cooling unit operating time in the first embodiment. [Figure 6] This figure shows the pulse train in the heating section according to the first embodiment. [Figure 7] This figure shows the pulse train in the maintenance section according to the first embodiment. [Figure 8] This figure shows a pulse train in which the pulse width of the heating section is adjusted according to the first embodiment. [Figure 9] This figure shows a pulse train in which the pulse width of the heating section is adjusted according to the first embodiment. [Figure 10] This is a sequence diagram of a control method for a skin treatment device for remodeling facial shape using multi-frequency RF energy according to a second embodiment of the present invention. [Figure 11] This is a detailed sequence diagram of a second embodiment of the present invention. [Figure 12] This is a sequence diagram of a method for remodeling a face shape, which is a third embodiment of the present invention. [Figure 13] This is a detailed sequence diagram of the third embodiment. [Modes for carrying out the invention]

[0013] Hereinafter, a skin treatment device and its control method for remodeling a facial shape using multi - frequency RF energy according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description of the following embodiments, the names of the respective components can be called by other names in the art. However, if there are functional similarities and identities, even if a modified embodiment is adopted, it can be regarded as an equivalent configuration. Also, the reference numerals added to each component are described for convenience of explanation. However, the illustrated content on the drawings with these reference numerals does not limit each component within the scope of the drawings. Similarly, even if an embodiment with a partially modified configuration on the drawing is adopted, if there are functional similarities and identities, it can be regarded as an equivalent configuration. Also, in light of the general technical level of those skilled in the art, if a component that should be included as a matter of course is recognized, the description thereof will be omitted.

[0014] In this specification, treatment means exerting an effect of improving Wrinkles, Tone and Textural Changes, Scars and Acne Scarring, Sagging mucosa, Overall Rejuvenation, Hyperhidrosis, laxity, lifting, tightening, Fat reduction, etc. by heating skin tissue, and it is described on the premise that treatment also means heating fat cells to cause cell death and preventing additional fat accumulation.

[0015] FIG. 1 is a block diagram showing the configuration of a skin treatment device for remodeling a facial shape using multi - frequency RF energy according to the first embodiment of the present invention.

[0016] As shown in FIG. 1, a skin treatment device 1 for remodeling a face shape using multi - frequency RF energy according to the first embodiment of the present invention can be configured to include a main body 20 and a handpiece 10. The main body 20 is provided with elements for generating and controlling RF energy, etc., and the handpiece 10 is configured to transmit RF energy to tissues. The main body 20 can include a power supply unit 400, an RF generation unit 300, an RF adjustment unit 200, and a control unit 500. The handpiece 10 can include an electrode 100, a temperature sensor 600, and a cooling unit 700. However, although not shown in the figure, the handpiece 10 and the main body 20 can be connected by a cable and configured to transmit and receive various signals for RF energy and control. Further, the handpiece 10 and / or the main body 20 can further include a display unit (not shown) for presenting various information related to operation and treatment and receiving commands from the user.

[0017] The RF generation unit 300 can be configured to be supplied with power from the power supply unit 400 and generate RF energy. The RF adjustment unit 200 can be configured to adjust at least one of the frequency, power, voltage, power, etc. of the RF energy generated from the RF generation unit 300. On the other hand, a widely known circuit configuration can be applied to the power supply unit 400, the RF generation unit 300, and the RF adjustment unit 200.

[0018] The electrode 100 is electrically connected to the RF adjustment unit 200 and configured to be able to transmit RF energy. The electrode 100 can be configured to be exposed at the end of the handpiece and, when in contact with tissues, be configured to transmit RF energy to the tissues. The electrode 100 can be composed of a plurality and arranged in a predetermined pattern. At least a part of the electrode 100 can be configured to be planar so as to be able to transmit RF energy to tissues non - invasively. The electrode 100 can function as a bipolar electrode or a monopolar electrode.

[0019] The cooling unit 600 can be configured to prevent excessive tissue damage when RF energy is transmitted and the tissue is heated. The cooling unit 600 can cool the area behind the electrode in contact with the tissue, or it can directly cool the skin tissue. The cooling unit 600 can spray a coolant so that the electrode and / or tissue can be cooled via the heat of vaporization of the coolant. The cooling unit 600 can also selectively bring a heat sink into contact with the electrode and / or tissue so that the electrode and / or tissue can be cooled by conduction. The cooling unit 600 can also be configured as an air-cooled unit that forces air to flow inside the handpiece. However, the above-described configuration of the cooling unit 600 is just one example, and it can be modified and applied to various configurations in which the cooling power is actively adjusted by the configuration of the control unit 500.

[0020] The temperature sensor 700 is configured to measure temperature at multiple points along the path of RF energy transmission to the tissue. The temperature sensor 700 can be configured with multiple temperature sensors. The multiple temperature sensors can be configured to measure temperature at multiple points within the treatment area to which RF energy is transmitted.

[0021] The control unit 500 controls the RF adjustment unit 200 so that the frequency or pulse width of the RF energy can be adjusted. The control unit 500 configures a pulse train and transmits multi-frequency RF energy through a sequence. The control unit 500 can also control the RF generator 300 to shut off RF energy if it determines that it is necessary to shut off RF energy based on values ​​received from multiple temperature sensors 700. Furthermore, the control unit can control the operation of the cooling unit 600 based on values ​​received from the temperature sensors 700 or the frequency of the RF energy currently applied to the tissue.

[0022] Figure 2 shows the region where skin tissue is heated by the RF energy frequency selected in the first embodiment. In this case, the magnitude of the frequencies is 1st frequency < 2nd frequency < 3rd frequency.

[0023] As shown in Figure 2, when RF energy is transmitted through the skin, the heating depth can appear to differ depending on the frequency of the RF energy. When the RF electrode is configured as monopolar, the RF energy is transmitted from the handpiece electrode to a return electrode (not shown) separately attached to the body. It has been shown that different frequencies of RF energy result in different areas being heated within the skin tissue.

[0024] Skin tissue can be divided from the surface into the epidermis, dermis (papillary dermis, reticular dermis), hypodermis, and fat layer. Each layer constituting the skin tissue can exhibit different conductivity and dielectric constants to RF frequencies. By utilizing these electrical properties of the tissue and adjusting the frequency of the RF energy, it becomes possible to heat the skin to a desired depth.

[0025] This disclosure allows the skin treatment device to adjust the frequency of RF energy to control the portion of the skin tissue that is heated, so that it can achieve optimal therapeutic effects.

[0026] RF energy tends to heat shallower areas within a specific range as the frequency increases. The control unit can adjust the heating area within the tissue by adjusting the RF energy frequency to a first frequency, a second frequency, and a third frequency. The first frequency can be selected to heat the skin tissue from the epidermis to the dermis and then to the hypodermis. The second frequency can be selected to heat the skin tissue from the epidermis to the dermis. The third frequency can be selected to selectively heat the deep fat layer. In this case, the RF energy at the third frequency can heat both the shallow and deep fat cells in the skin tissue. As mentioned above, by applying RF energy with a specific frequency based on the electrical characteristics of different parts of the skin tissue, it is possible to selectively heat the deep fat layer.

[0027] The first frequency domain can be 1-3 MHz, the second frequency domain 3-10 MHz, and the third frequency domain 10-30 MHz. As a more detailed example, the first frequency can be approximately 2 MHz, the second frequency approximately 6 MHz, and the third frequency approximately 13 MHz. As an example, the first frequency can be 2.26 MHz, the second frequency 6.78 MHz, and the third frequency 13.56 MHz.

[0028] However, the frequencies are not limited to those mentioned above. In this disclosure, the first, second, and third frequencies can be divided into frequency ranges where the heating depth within the tissue differs, and the third frequency can be selected as a frequency range that can heat fat cells better than other layers that make up the skin.

[0029] Figure 3 shows an example of a pulsed RF energy train according to the first embodiment.

[0030] As shown in Figure 3, in the first embodiment, the RF energy pulse train can be configured, for example, with a first frequency of 1 to 3 MHz, a second frequency of 3 to 10 MHz, and a third frequency of 10 to 30 MHz.

[0031] On the other hand, when RF energy is transmitted within skin tissue, the difference in energy transmission efficiency due to temperature can change abruptly. This is due to changes in impedance within the tissue caused by temperature differences. Therefore, when transmitting RF energy to treat deep tissue, preheating the area in the direction of RF energy transmission can increase the efficiency of RF energy transmission.

[0032] On the other hand, as an example of the frequencies constituting the pulse train in this disclosure, first, a first frequency of 2.26 MHz is configured for heating the epidermis, dermis, and hypodermis layers. Subsequently, the pulse train includes a predetermined rest period, and then 6.78 MHz is selected as a second frequency for heating the epidermal and dermal layers. When the RF energy of the second frequency is transmitted while the epidermis, dermis, and hypodermis layers are heated by the RF energy of the first frequency, the RF energy transmission efficiency to the dermal layer can be maximized. Subsequently, the pulse train includes a predetermined rest period, and a third frequency of 13.56 MHz can be configured for heating up to the fat layer. At this time, since the RF energy of the first frequency and the RF energy of the second frequency have already been transmitted and the epidermal and dermal layers are heated, the electrical characteristics of each layer of tissue are changed, and the heat distribution pattern within the tissue changes. Ultimately, by applying a third frequency RF energy to the skin tissue to heat the fat layer, the efficiency of RF energy transfer is increased, and selective heating of the fat layer is efficiently achieved. Furthermore, from a thermal perspective, since the fat layer is heated while the hypodermis is preheated, heat loss from the heated fat layer to the surface can be minimized.

[0033] However, the aforementioned predetermined rest period may be omitted. Furthermore, if multiple electrodes are used, RF energy of different frequencies may be transmitted to each electrode. In this case, at least two RF energies from the first, second, and third frequencies can be transmitted to the tissue in an overlapping manner.

[0034] As described above, this disclosure uses multi-frequency RF energy to maximize the RF energy transfer efficiency with respect to heating depth. Furthermore, the pulse pattern of the basic pulse train heats the tissue adjacent to the adipocytes, and the frequency of the RF energy pulses is adjusted so that heating can reach deep into the tissue.

[0035] Figure 4 is a graph showing the heating phase and hold phase based on tissue temperature during RF energy transfer in the first embodiment.

[0036] As shown in Figure 4, when RF energy is delivered to kill fat cells, the treatment phase can be distinguished by the temperature of the fat layer. The treatment phase can be divided into a heating phase, which is the phase in which RF energy is delivered to the fat layer to heat it, and a holding phase, which is the phase in which the fat layer is maintained at the treatment temperature. The control unit can configure the pulse trains that make up the heating phase and the holding phase to be different from each other. For example, the frequency of the first frequency can be adjusted to be different in each phase, or the frequency of the third frequency can be configured to be different. As another example, the pulse train can be configured with a ratio of first frequency:second frequency:third frequency that is different in the heating phase and the holding phase. For example, in the heating phase, the pulse train can be configured with a ratio of first frequency:second frequency:third frequency of 2:3:5, and in the holding phase, the pulse train can be configured with a ratio of 1:3:6.

[0037] Furthermore, at least one pulse width among the pulse widths that make up the pulse train can be adjusted. Specifically, the pulse width of the first frequency can be increased during the heating section, and the pulse width of the third frequency can be increased during the maintenance section.

[0038] Figure 5 shows the RF energy pulse train, tissue temperature, and cooling unit operating time in the first embodiment.

[0039] For skin remodeling, it is necessary to heat the dermis to a temperature that can alter it, for example, 70°C to 80°C, to cause it to coagulate.

[0040] On the other hand, changes in facial shape are primarily caused by changes in the curvature of the skin surface. This curvature can be corrected by altering the thickness of the underlying fat layer. The death of fat cells prevents the accumulation of additional fat and ultimately thins the fat layer. It is known that heating at 44°C to 46°C is necessary for the death of fat cells.

[0041] When treating the dermis and fat layers of the skin simultaneously, it is necessary to alter the dermal layer for skin remodeling and to simultaneously kill the fat cells present in the fat layer.

[0042] On the other hand, when the pulse train is determined in the order of 2.26 MHz, 6.78 MHz, and 13.56 MHz, heating occurs first to the epidermis, dermis, and hypodermis, and finally, the fat layer can be heated to the therapeutic temperature. At this time, the epidermal layer may experience a continuous increase in temperature, so it can be cooled to prevent excessive damage. The control unit can adjust the power of the cooling unit based on the frequencies that make up the pulse train. The control unit can increase the power of the cooling unit when transmitting RF energy at a frequency of 2.26 MHz, which heats the RF energy from the epidermis to the hypodermis. Conversely, when transmitting RF energy at a frequency of 13.56 MHz, which concentrates the RF energy in deeper tissues, the power of the cooling unit can be decreased.

[0043] Figure 6 shows the pulse train in the heating section in the first embodiment, and Figure 7 shows the pulse train in the maintenance section in the first embodiment.

[0044] In this disclosure, the control unit can be configured to apply different pulse trains to the heating section and the maintenance section.

[0045] As an example, as shown in Figure 6, the control unit can determine the ratio of the first frequency:second frequency:third frequency included in the pulse train to 2:3:5 in order to quickly heat the tissue to the therapeutic temperature during the heating phase. However, when initially applying RF energy to the tissue, it is preferable to configure the pulse train in the order of first frequency for heating the epidermis, dermis, and hypodermis, and then second frequency for heating the epidermis and dermis. This process of changing the frequency in the order of first frequency, second frequency, and third frequency to transmit RF energy can be repeated a predetermined number of times within the heating phase.

[0046] As another example, as shown in Figure 7, the control unit can determine the ratio of the first frequency:second frequency:third frequency included in the pulse train to 1:3:6 during the hold phase to prevent damage while maintaining the tissue at the therapeutic temperature. That is, after the tissue has risen to the therapeutic temperature, the frequency of the third frequency can be set to the highest to deliver RF energy to the fat layer, which has the highest specific heat. The frequency of the third frequency in the pulse train during the hold phase can be set higher than the frequency of the third frequency during the heating phase. During the temperature hold phase, the frequency of the third frequency is increased to selectively heat fat cells in order to maintain fat cells, which have a high specific heat, at the therapeutic temperature. Also during the hold phase, pulses adjusted with the second and first frequencies may be applied to the tissue to maintain the epidermis and dermis at the therapeutic temperature.

[0047] After a predetermined time has elapsed, the control unit can interrupt the transmission of RF energy. However, the proportion of pulse trains configured for each frequency as described above is just an example, and the control unit can configure pulse trains at different frequency intervals for the heating section and the maintenance section.

[0048] Figures 8 and 9 show a pulse train in which the pulse width of the heating section is adjusted according to the first embodiment.

[0049] The control unit can adjust the pulse width based on the tissue temperature measured during RF energy transmission.

[0050] As shown in Figure 8, when RF energy is transmitted by adjusting the frequency using a pulse train during the heat phase, the control unit can increase the pulse width of the first frequency (2.26 MHz) to increase the surface temperature if the skin surface temperature is measured to be lower than the required temperature.

[0051] As shown in Figure 9, contrary to Figure 8, if the skin surface temperature is measured to be higher than the required temperature, the control unit can reduce the pulse width of the first frequency to prevent an excessive rise in the temperature of the epidermis.

[0052] On the other hand, the pulse trains shown in Figures 6 to 9 illustrate examples where the RF energy pulses are frequency-adjusted. However, this can be modified and applied to situations where the RF energy is adjusted at each frequency and transmitted to the tissue as a monopulse.

[0053] The following describes a control method for a skin treatment device for remodeling facial shape using multi-frequency RF energy according to a second embodiment of the present invention, with reference to Figures 10 and 11.

[0054] Figure 10 is a sequence diagram of a control method for a skin treatment device for remodeling facial shape using multi-frequency RF energy according to a second embodiment of the present invention.

[0055] As shown in Figure 10, a control method for a skin treatment device for remodeling the face shape using multi-frequency RF energy according to the second embodiment of the present invention may include the steps of generating RF energy from an RF generating unit (S1100), transmitting the RF energy to an electrode (S1200), and controlling the RF energy so that multi-frequency RF energy can be transmitted (S1300).

[0056] The step of generating RF energy from the RF generation unit (S1100) corresponds to the step of generating RF energy when certain requirements are met based on user input or a predetermined algorithm. This step can be performed through an operation in which the control unit controls the RF generation unit. In this case, the conditions that the control unit determines may be whether the electrode maintains contact with the tissue based on values ​​measured from the electrode.

[0057] The step of transferring RF energy to the electrodes (S1200) corresponds to the step of transferring RF energy to the electrodes.

[0058] The step of controlling the RF energy so that multi-frequency RF energy can be transmitted (S1300) corresponds to the step of adjusting the frequency and / or pulse width of the RF energy transmitted to the electrode. This step may include the control unit controlling the RF adjustment unit to adjust the frequency of the RF energy. The control unit can adjust the frequency of the RF energy to at least three different frequencies for the heating portion of the RF energy within the tissue.

[0059] The control unit can control the RF energy using a predetermined pulse train. For example, the control unit can first determine the frequencies of a first frequency (2.26 MHz) for heating the epidermis, dermis, and hypodermis, a second frequency (6.78 MHz) for heating up to the dermis, and a third frequency (13.56 MHz) for selectively heating fat, thereby configuring a pulse train.

[0060] The control unit can adjust the frequency and / or pulse width of the first to third frequencies constituting the pulse train as treatment time elapses and the skin surface temperature rises. The control unit can adjust the frequency / pulse width of each frequency in real time. Subsequently, the control unit can control predetermined conditions, such as the total amount of RF energy transmitted or, if the treatment time has elapsed, to shut off the RF energy.

[0061] On the other hand, although not shown in the diagram, the control unit can adjust the power of the cooling unit for cooling the skin surface based on the temperature of the tissue surface and / or the frequency of the applied RF energy.

[0062] Figure 11 is a detailed sequence diagram of a second embodiment of the present invention.

[0063] As shown in Figure 11, in the second embodiment, the step of controlling the RF energy to transmit multi-frequency RF energy (S1300) may include a heating section control step (S1310) which adjusts the RF energy with a pulsed train of a first frequency with a deep heating depth in the tissue and a heating section control step (S1320) which adjusts the RF energy with a pulsed train of a third frequency with a high frequency for heating adipocytes.

[0064] The heating section control step (S1310), which adjusts the RF energy with a pulse train of a first frequency with a high frequency that heats to a deep heating depth within the skin tissue, is performed to quickly heat the tissue to the treatment temperature initially. At this time, when the temperature of the epidermis, dermis, and hypodermis rises above a certain temperature, the efficiency of RF energy transfer to the deeper fat layer increases. Therefore, the control unit increases the frequency of the first frequency so that the epidermis, dermis, hypodermis, and fat layer can be quickly raised to their respective treatment temperatures. At this time, the frequency of the first frequency in this step (S1310) can be higher than in step (S1320) described later.

[0065] The heating section control step (S1320), which adjusts the RF energy by a high-frequency train of a third frequency for heating fat cells, corresponds to the step of adjusting the RF energy to maintain the tissue at a therapeutic temperature. The control unit can perform control to maintain the fat layer at a therapeutic temperature, as it has a higher specific heat and a somewhat slower temperature rise than the epidermal or dermal layers. As an example, the control unit can control the RF energy by increasing the frequency of selecting 13.56 MHz as the third frequency that enables selective heating of the fat layer. Here, selective heating of the fat layer means that when RF energy is transmitted at the third frequency, the RF energy absorption rate in fat is higher than in other layers of skin tissue, and the fat layer is heated.

[0066] In other words, the control unit can adjust the frequency of selected frequencies from among the multi-frequency RF energy at the beginning and end of RF energy transmission to perform optimal treatment.

[0067] The control method for a skin treatment device for remodeling facial shape using multi-frequency RF energy, as described above with reference to Figures 10 and 11, can be applied to the skin treatment device for remodeling facial shape using multi-frequency RF energy, which is the first embodiment of the present invention, as described with reference to Figures 1 to 9.

[0068] Figure 12 is a sequence diagram of a method for remodeling a face shape, which is a third embodiment of the present invention.

[0069] As shown in Figure 12, a third embodiment of the present invention, a method for remodeling the face, may include the steps of: bringing electrodes into contact with the skin (S2100); transmitting RF energy to the tissue (S2200); and transmitting the multi-frequency adjusted RF energy to the tissue to treat the fat layer (S2100).

[0070] Step S2100, which involves attaching electrodes to the skin, corresponds to the step in which the user attaches electrodes to the areas of the patient's skin that the user has determined require treatment. The user (or medical staff) selects the areas deemed necessary for facial shape changes and attaches electrodes capable of transmitting RF energy to the skin.

[0071] The step of transmitting RF energy to the tissue (S2200) corresponds to the step of transmitting RF energy to the tissue through user operation while the electrodes are in close contact with the skin.

[0072] Step (S2100) of treating the fat layer by transmitting the multi-frequency-adjusted RF energy to the tissue corresponds to a step of adjusting the heating of different depths within the tissue while adjusting the frequency of the RF energy. Skin tissue consists of the epidermis, dermis, hypodermis, and fat layer, each of which has a different temperature for treatment. The epidermis and dermis undergo degeneration for tissue remodeling, and the tissue temperature for degeneration can reach 70°C to 80°C. On the other hand, fat treatment can be performed by heating to 44°C to 46°C to kill fat cells and maintaining this temperature for a predetermined time. This step (S2300) is performed to prevent excessive damage to the epidermis and dermis and to maintain the fat layer at the treatment temperature. In this step, the multi-frequency may include a first frequency for heating the epidermis, dermis, and hypodermis, a second frequency for heating up to the dermis, and a third frequency for selectively heating fat. In this step, the frequencies of the first frequency, second frequency, and third frequency can be made different from each other depending on the treatment mode.

[0073] In other words, in this step, the epidermis, dermis, and hypodermis can be heated at a higher frequency in the initial treatment mode, and the heating frequency of the epidermis, dermis, and hypodermis can be reduced in the later treatment mode. Furthermore, the heating frequency of the fat layer can be kept low in the initial treatment mode and increased in the later treatment mode.

[0074] On the other hand, the third embodiment of the present invention can be repeatedly performed on the face for treatment. That is, the third embodiment of the present invention can be performed repeatedly while changing the area to which the RF energy is transmitted.

[0075] Figure 13 is a detailed sequence diagram of the third embodiment.

[0076] As shown in Figure 13, in the third embodiment, the step of delivering the RF energy to the tissue to treat the fat layer (S2100) may include a heating step (S2310) that increases the frequency of selecting a frequency that can heat deep into the tissue, and a maintenance step (S2320) that increases the frequency of selectively delivering the RF energy to fat cells in the tissue.

[0077] The heating step (S2310), which increases the frequency of RF energy transmission to deeper parts of the tissue, corresponds to a step that rapidly raises the temperature of the epidermis, dermis, and hyperpodermis in order to increase the RF energy transmission efficiency depending on the manner in which the RF energy is transmitted. At this time, the frequency can be divided into a first frequency range of 1 to 3 MHz, a second frequency range of 3 to 10 MHz, and a third frequency range of 10 to 30 MHz. In this step, the frequency of selecting the RF energy frequency in the first and second frequency ranges can be even higher than the frequency of selection in the third frequency range.

[0078] The maintenance step (S2320), which increases the frequency of RF energy delivery to adipocytes within the tissue, corresponds to the step of increasing the frequency of third-frequency RF energy to maintain the temperature of the fat layer at a therapeutic temperature. During this step, first-frequency and second-frequency RF energy may also be repeatedly delivered to maintain the temperature of the epidermis, dermis, and hypodermis. On the other hand, the selection frequency of the third frequency in this step (S2320) can be higher than that in the heating step (S2310).

[0079] On the other hand, the method of remodeling the face shape described with reference to Figures 12 and 13 can be performed using a skin treatment device for remodeling the face shape using multi-frequency RF energy, which is the first embodiment of the present invention described with reference to Figures 1 to 10.

[0080] As described above, the skin treatment device for remodeling facial shape using multi-frequency RF energy according to the present invention, its control method, and the method for remodeling facial shape using the same have the effect of increasing treatment efficiency because they perform skin treatment using RF energy of various frequencies with different energy transmission depths within the tissue. [Explanation of symbols]

[0081] 100 electrodes 500 Control Unit

Claims

1. A main unit comprising an RF generation unit and an RF adjustment unit, A handpiece connected to the main body, with an electrode on one side to transmit RF energy transmitted from the main body to the skin, A control unit that controls the RF adjustment unit so that it can transmit the RF energy of one frequency selected from multiple frequencies, Equipped with, By controlling the RF adjustment unit, the RF energy is transmitted according to a pulse train in which pulses of RF energy of three different frequencies exist in a time series. The three distinct frequencies are a first frequency, a second frequency, and a third frequency, which result in different heating depths for the skin tissue. The aforementioned third frequency is a frequency selected from the range of 10 to 30 MHz. The control unit, The time interval for transmitting the RF energy is divided into a heating phase and a holding phase. A skin treatment device for remodeling the face shape using RF energy, wherein the proportion of time to which the first frequency, second frequency, and third frequency constituting the pulse train are applied in the heating section and the maintenance section is configured to be different from that of the other.

2. The control unit controls the pulse train, A skin treatment device for remodeling the face shape using RF energy according to claim 1, wherein the frequency of the first frequency is higher in the heating section than in the maintenance section.

3. The control unit controls the pulse train, A skin treatment device for remodeling the face shape using RF energy according to claim 1, wherein the frequency of the third frequency is higher in the maintenance section than in the heating section.

4. The aforementioned first frequency is 1 to 3 MHz. A skin treatment device for remodeling the face shape using RF energy according to claim 1, wherein the second frequency is 3 to 10 MHz.

5. The control unit of the skin treatment device generates RF energy from the RF generation unit, The control unit performs the steps of transmitting the RF energy to the electrode, When transmitting RF energy to the electrode, the control unit controls the RF energy so that it can transmit RF energy of one frequency selected from multiple frequencies. Includes, The step of controlling the RF energy is: By controlling the RF energy, the RF energy is transmitted according to a pulse train in which pulses of RF energy of three different frequencies exist in a time series. The three distinct frequencies are a first frequency, a second frequency, and a third frequency, which result in different heating depths for the skin tissue. Of the three different frequencies mentioned above, The aforementioned first frequency is a frequency that can heat from the skin surface to the subcutaneous tissue. The second frequency is a frequency that can heat from the skin surface to the dermis layer. The aforementioned third frequency is a frequency selected from the range of 10 to 30 MHz. The step of controlling the RF energy is: Includes a heating section control step and a maintenance section control step, A control method for a skin treatment device for remodeling the face shape using RF energy, wherein the heating section control step and the maintenance section control step are configured to have different time ratios for which the first frequency, second frequency, and third frequency constituting the pulse train are applied.

6. The aforementioned heating section control step is: A method for controlling a skin treatment device for remodeling a face shape using RF energy according to claim 5, wherein the pulse train includes the first frequency at a higher frequency than the maintenance interval control step.

7. The aforementioned maintenance interval control step is: A method for controlling a skin treatment device for remodeling the face shape using RF energy according to claim 5, wherein the pulse train includes the third frequency at a higher frequency than the heating section control step.

8. The aforementioned first frequency is 1 to 3 MHz. A method for controlling a skin treatment device for remodeling the face shape using RF energy according to claim 5, wherein the second frequency is 3 to 10 MHz.

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