Skin treatment apparatus for remodeling face shape using multi-frequency RF energy, and control method thereof

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]

[0001] The present invention relates to a skin treatment device and method for controlling the same for remodeling facial contours using multi-frequency RF energy. [Background technology]

[0002] Various types of devices have been developed to deliver RF energy to tissue for therapeutic purposes, and in particular, devices that use RF energy to induce appropriate changes in the skin and exert a skin treatment effect through tissue regeneration have been developed in recent years.

[0003] A conventional treatment device using RF energy is disclosed in Korean Patent Registration No. 0706155. This conventional device treats the skin using RF energy of a fixed frequency, and has a problem of low treatment efficiency. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Korean Patent No. 0706155 Summary of the Invention [Problem to be solved by the invention]

[0005] In order to solve the above-mentioned problems, the present invention aims to provide a skin treatment device and a control method thereof for remodeling facial shape using multi-frequency RF energy that can adjust the frequency of RF energy according to the depth and temperature of tissue. [Means for solving the problem]

[0006] As a means for solving the above problem, a treatment device using RF energy can be provided that can transmit RF energy by adjusting the RF energy to multiple frequencies during one treatment.

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

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

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

[0010] Furthermore, the present invention may provide a method for remodeling a face shape by forming a pulse train with a frequency different from each other for heating depth in skin tissue and delivering RF energy to the tissue by the pulse train. Meanwhile, the method for remodeling a face shape may improve treatment efficiency by adjusting the frequency at which RF energy is delivered to the epidermis layer, dermis layer, and fat layer based on at least one of the treatment elapsed time, the temperature of the tissue or skin surface, and the treatment mode. Effect of the Invention

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

[0012] [Figure 1] FIG. 1 is a block diagram showing the configuration of a skin treatment device for remodeling facial shape using multi-frequency RF energy according to a first embodiment of the present invention. [Diagram 2]FIG. 2 is a diagram showing an area where skin tissue is heated by a frequency of RF energy selected in the first embodiment. [Diagram 3] FIG. 2 is a diagram showing an example of a pulse train of RF energy in the first embodiment. [Figure 4] 4 is a graph showing a heat phase and a hold phase according to tissue temperature when RF energy is transmitted in the first embodiment. [Diagram 5] FIG. 11 is a diagram showing the pulse train of RF energy, the temperature of the tissue, and the driving time of the cooling unit in the first embodiment. [Figure 6] FIG. 4 is a diagram showing a pulse train in a heating section in the first embodiment. [Figure 7] FIG. 4 is a diagram showing a pulse train in a sustain section in the first embodiment. [Figure 8] FIG. 4 is a diagram showing a pulse train in which the pulse width of a heating section is adjusted in the first embodiment. [Figure 9] FIG. 4 is a diagram showing a pulse train in which the pulse width of a heating section is adjusted in the first embodiment. [Figure 10] FIG. 11 is a flow chart 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] FIG. 11 is a detailed flow chart of the second embodiment of the present invention. [Figure 12] FIG. 11 is a flow chart of a method for remodeling a face shape according to a third embodiment of the present invention. [Figure 13] FIG. 11 is a detailed flow chart of the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, a skin treatment device for remodeling a face shape using multi-frequency RF energy and a control method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the embodiment, the names of the components may be called by other names in the art. However, if there is functional similarity and identity between the components, the modified embodiment may be considered as an equivalent configuration. Furthermore, the reference numerals attached to the components are described for convenience of description. However, the illustrated contents in the drawings in which the reference numerals are described do not limit the respective components to the scope of the drawings. Similarly, if an embodiment in which the configuration in the drawings is partially modified is adopted, the configuration may be considered as an equivalent configuration if there is functional similarity and identity between the components. Furthermore, if a component is considered to be a component that should be included as a matter of course in light of the general level of a technician in the relevant technical field, the description of the component will be omitted.

[0014] In this specification, treatment refers to heating skin tissue to improve wrinkles, tone and textural changes, scars and acne scarring, sagging mucosa, overall rejuvenation, hyperhidrosis, laxity, lifting, tightening, fat reduction, etc., and treatment is explained on the premise that it refers to heating and killing fat cells to prevent additional fat accumulation.

[0015] FIG. 1 is a block diagram showing the configuration of a skin treatment device for remodeling facial shape using multi-frequency RF energy according to a 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 a first embodiment of the present invention may be configured to include a main body 20 and a hand piece 10. The main body 20 includes elements for generating and controlling RF energy, and the hand piece 10 is configured to deliver RF energy to tissue. The main body 20 may include a power supply unit 400, an RF generator 300, an RF adjuster 200, and a controller 500. The hand piece 10 may include an electrode 100, a temperature sensor 600, and a cooling unit 700. Although not shown, the hand piece 10 and the main body 20 may be connected by a cable and configured to transmit and receive various signals for RF energy and control. In addition, the hand piece 10 and / or the main body 20 may further include a display unit (not shown) for displaying various information related to operation and treatment and receiving commands from a user.

[0017] The RF generating unit 300 may be configured to generate RF energy by receiving power from the power supply unit 400. The RF adjusting unit 200 is configured to adjust at least one of the frequency, power, voltage, and electric power of the RF energy generated from the RF generating unit 300. Meanwhile, the power supply unit 400, the RF generating unit 300, and the RF adjusting unit 200 may have a widely known circuit configuration.

[0018] The electrode 100 is electrically connected to the RF adjusting unit 200 and configured to transmit RF energy. The electrode 100 can be configured to be exposed at an end of a handpiece and configured to transmit RF energy to tissue when in contact with the tissue. The electrode 100 can be configured in multiple numbers and arranged in a predetermined pattern. The electrode 100 can be configured with at least a portion being planar so that RF energy can be non-invasively transmitted to tissue. The electrode 100 can function as a bipolar electrode or a monopolar electrode.

[0019] The cooling unit 600 may be configured to prevent excessive damage to the tissue when the tissue is heated by the RF energy. The cooling unit 600 may cool the back of the electrode contacted with the tissue, or may directly cool the skin tissue. The cooling unit 600 may inject a refrigerant to cool the electrode and / or tissue through the heat of vaporization of the refrigerant. The cooling unit 600 may selectively contact a heat sink with the electrode and / or tissue to cool the electrode and / or tissue by conduction. The cooling unit 600 may be configured as an air-cooling type that forces air to flow inside the handpiece. However, the above-mentioned configuration of the cooling unit 600 is merely an example, and may be modified and applied to various configurations in which the cooling power is actively adjusted according to the configuration of the control unit 500.

[0020] The temperature sensor 700 is configured to measure temperature at multiple points during the delivery of RF energy to 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 in the treatment area where the RF energy is delivered.

[0021] The control unit 500 controls the RF adjusting unit 200 to adjust the frequency or pulse width of the RF energy. The control unit 500 configures a pulse train and delivers multi-frequency RF energy through a sequence. The control unit 500 can also control the RF generating unit 300 to cut off the RF energy when it is determined that the RF energy needs to be cut off based on values ​​received from the multiple temperature sensors 700. Furthermore, the control unit can control the operation of the cooling unit 600 according to the values ​​received from the temperature sensors 700 or the frequency of the RF energy currently applied to the tissue.

[0022] 2 is a diagram showing an area where skin tissue is heated by the frequency of RF energy selected in the first embodiment. At this time, the magnitude of the frequency is the first frequency<the second frequency<the third frequency.

[0023] As shown in Figure 2, when RF energy is delivered through the skin, the heating depth can appear different depending on the frequency of the RF energy. If the RF electrode is configured as monopolar, the RF energy is delivered from the electrode of the handpiece to a return electrode (not shown) separately attached to the human body. It has been revealed that the area heated in the skin tissue appears different depending on the frequency of the RF energy.

[0024] Skin tissue can be divided into epidermis, dermis (papillary dermis, reticular dermis), hypodermis, and fat layer from the surface. Each layer of skin tissue can have different conductivity and dielectric constant with respect to RF frequency. By adjusting the frequency of RF energy using the electrical properties of the tissue, it is possible to heat the skin to a desired heating depth.

[0025] In the present disclosure, the frequency of the RF energy can be adjusted to control the amount of heat within the skin tissue so that the skin treatment device can provide optimal therapeutic effect.

[0026] The RF energy has a tendency that the deeper the heated portion in the tissue, the shallower the depth of the heated portion in the tissue, the higher the frequency within a certain range. The control unit can adjust the frequency of the RF energy to a first frequency, a second frequency, and a third frequency to adjust the heated portion in the tissue. The first frequency can be selected as a frequency capable of heating the epidermis to the dermis and the hypodermis of the skin tissue. The second frequency can be selected as a frequency capable of heating the epidermis to the dermis. The third frequency can be selected as a frequency capable of selectively heating the deep fat layer. In this case, the RF energy of the third frequency can heat the shallow and deep fat cells of the skin tissue. As described above, if RF energy having a specific frequency is applied according to the electrical characteristics of each part of the skin tissue, it is possible to selectively heat the deep fat layer.

[0027] The first frequency range may be 1 to 3 MHz, the second frequency range may be 3 to 10 MHz, and the third frequency range may be 10 to 30 MHz. As a more detailed example, the first frequency may be about 2 MHz, the second frequency may be about 6 MHz, and the third frequency may be about 13 MHz. As an example, the first frequency may be 2.26 MHz, the second frequency may be 6.78 MHz, and the third frequency may be 13.56 MHz.

[0028] However, the frequencies are not limited to those mentioned above, and in the present disclosure, the first frequency, the second frequency, and the third frequency may be divided into frequency ranges that result in different heating depths in tissue, and the third frequency may be selected as a frequency range that can heat fat cells better than other layers that make up the skin.

[0029] FIG. 3 is a diagram showing an example of a pulse train of RF energy in the first embodiment.

[0030] As shown in FIG. 3, in the first embodiment, the pulse train of RF energy 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] Meanwhile, when RF energy is delivered within skin tissue, the difference in energy delivery efficiency due to temperature can change rapidly. This is due to the change in impedance within the tissue due to the difference in temperature. Therefore, when RF energy is delivered to treat deep tissue, if the tissue is preheated in the direction in which the RF energy is delivered, the delivery efficiency of the RF energy can be increased.

[0032] Meanwhile, as an example of frequencies constituting a pulse train in the present disclosure, a first frequency for heating the epidermis, dermis, and hypodermis is first configured at 2.26 MHz. Then, the pulse train includes a rest period of a predetermined period, and then, 6.78 MHz is selected as a second frequency for heating the epidermis and dermis. When RF energy of the second frequency is transmitted in a state in which the epidermis, dermis, and hypodermis are heated by RF energy of the first frequency, the efficiency of RF energy transmission to the dermis layer can be maximized. Then, the pulse train includes a rest period of a predetermined period, and a third frequency for heating up to the fat layer can be configured at 13.56 MHz. 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 epidermis and dermis are heated, the electrical properties of each layer of tissue are changed, and the heat distribution state within the tissue is changed. Finally, when the third frequency RF energy for heating the fat layer is applied to the skin tissue, the transfer efficiency of the RF energy is increased, and selective heating of the fat layer is efficiently performed. Also, from a thermal standpoint, since the fat layer is heated while the hypodermis is heated in advance, the heat loss from the heated fat layer to the surface can be minimized.

[0033] However, the rest period of the predetermined period may be omitted. In addition, when a plurality of electrodes are used, RF energy of different frequencies may be delivered to each electrode. In this case, RF energy of at least two frequencies among the first frequency, the second frequency, and the third frequency may be delivered to the tissue in a superimposed manner.

[0034] In the present disclosure, as described above, multi-frequency RF energy is used to maximize the efficiency of RF energy transfer depending on the heating depth, and the pulse pattern of the basic pulse train heats tissue adjacent to fat cells, and the frequency of the RF energy pulses is adjusted so that the tissue can be heated deep inside.

[0035] FIG. 4 is a graph showing a heat phase and a hold phase according to tissue temperature when RF energy is transmitted in the first embodiment.

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

[0037] In addition, at least one of the pulse widths constituting the pulse train can be adjusted, i.e., the pulse width of the first frequency can be increased in the heating section, and the pulse width of the third frequency can be increased in the maintaining section.

[0038] FIG. 5 is a diagram showing the pulse train of RF energy, the temperature of the tissue, and the driving time of the cooling unit in the first embodiment.

[0039] For skin remodeling, it is necessary to heat the dermis to a temperature capable of denaturing it, for example, at 70°C to 80°C, so as to denature it into a coagulation state.

[0040] Meanwhile, changes in the shape of the face are mainly caused by changes in the curvature of the skin surface. The curvature of the skin surface can be corrected by changing the thickness of the fat layer present deep inside. The death of fat cells prevents additional fat accumulation and ultimately has the effect of thinning the fat layer. It is known that a heating process at 44℃~46℃ is necessary for the death of fat cells.

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

[0042] Meanwhile, when the pulse train is determined in the order of 2.26MHz, 6.78MHz, and 13.56MHz, the epidermis, dermis, and hypodermis are heated first, and finally the fat layer is heated to the treatment temperature. At this time, the epidermis layer may be cooled to prevent excessive damage because the temperature may be continuously increased. The control unit may adjust the power of the cooling unit based on the frequency constituting the pulse train. When the control unit delivers RF energy at a frequency of 2.26MHz, which heats from the epidermis to the hypodermis, the control unit may increase the power of the cooling unit. Conversely, when the control unit delivers RF energy at a frequency of 13.56MHz, which concentrates RF energy deep inside, the control unit may decrease the power of the cooling unit.

[0043] FIG. 6 is a diagram showing a pulse train in the heating section in the first embodiment, and FIG. 7 is a diagram showing a pulse train in the maintaining section in the first embodiment.

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

[0045] For example, as shown in Fig. 6, the control unit may 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 a treatment temperature during the heating phase. However, when RF energy is first applied to the tissue, it is preferable to configure the pulse train in the order of the first frequency for heating the epidermis, dermis, and hypodermis, and then the second frequency for heating the epidermis and dermis. This process of transmitting RF energy in the order of the first frequency, second frequency, and third frequency may be repeated a predetermined number of times within the heating phase.

[0046] As another example, as shown in FIG. 7, the control unit may determine the ratio of the first frequency: the second frequency: the third frequency included in the pulse train to 1:3:6 in the hold phase to prevent damage while maintaining the tissue at the treatment temperature. That is, after the tissue is heated to the treatment temperature, the frequency of the third frequency for transmitting RF energy to the fat layer having the highest specific heat may be set to the highest. The frequency of the third frequency in the pulse train in the hold phase may be set to be higher than the frequency of the third frequency in the heating phase. In the temperature hold phase, the frequency of the third frequency that can selectively heat fat cells is increased to maintain fat cells having a high specific heat at the treatment temperature. Also, in the hold phase, pulses adjusted to the second frequency and the first frequency may be applied to the tissue to maintain the epidermis layer and the dermis layer at the treatment temperature.

[0047] Thereafter, when a predetermined time has elapsed, the control unit may stop transmitting the RF energy. However, the ratio at which the pulse train is configured for each frequency described above is merely an example, and the control unit may configure the pulse train at a frequency that differs from that of the frequency at which the pulse train is configured for each frequency in the heating section and the maintaining section.

[0048] 8 and 9 are diagrams showing a pulse train in which the pulse width of the heating section is adjusted in the first embodiment.

[0049] The controller can adjust the pulse width based on the tissue temperature measured during delivery of the RF energy.

[0050] As shown in FIG. 8, when RF energy is delivered by adjusting the frequency using a pulse train in 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 lower than the required temperature.

[0051] As shown in FIG. 9, contrary to FIG. 8, when the temperature of the skin surface 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] Meanwhile, the pulse trains shown in FIGS. 6 to 9 show examples in which the RF energy pulses are frequency-adjusted, but the RF energy can be modified to be delivered to the tissue as a monopulse.

[0053] Hereinafter, a method for controlling a skin treatment device for remodeling a face shape using multi-frequency RF energy according to a second embodiment of the present invention will be described with reference to FIGS. 10 and 11. FIG.

[0054] FIG. 10 is a flow chart of a method for controlling 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 FIG. 10, a control method of a skin treatment device for remodeling a face shape using multi-frequency RF energy according to a second embodiment of the present invention may include a step of generating RF energy from an RF generating unit (S1100), a step of transmitting the RF energy to an electrode (S1200), and a step of controlling the RF energy so as to transmit multi-frequency RF energy (S1300).

[0056] The step of generating RF energy from the RF generator (S1100) corresponds to a step of generating RF energy when a certain requirement is satisfied by a user input or a predetermined algorithm. This step may be performed through an operation of the controller controlling the RF generator. In this case, the condition determined by the controller may be whether the electrode maintains contact with the tissue based on a value measured from the electrode.

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

[0058] The step of controlling the RF energy so as to deliver multi-frequency RF energy (S1300) corresponds to a step of adjusting the frequency and / or pulse width of the RF energy delivered to the electrode. This step may include a step of the controller controlling the RF adjuster to adjust the frequency of the RF energy. The controller may adjust the frequency of the RF energy to at least three frequencies with different heating portions of the RF energy in the tissue.

[0059] The control unit can control the RF energy according to 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 layer, and a third frequency (13.56 MHz) for selectively heating fat, and configure the 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 the treatment time elapses and as the temperature of the skin surface increases. The control unit can adjust the frequency / pulse width of each frequency in real time. The control unit can then control the RF energy to be cut off according to predetermined conditions, such as the amount of total RF energy delivered, or when the treatment time has elapsed.

[0061] Alternatively, although not shown, the control unit can adjust the power of the cooling unit to cool the skin surface based on the temperature of the tissue surface and / or the frequency of the applied RF energy.

[0062] FIG. 11 is a detailed flow chart of the second embodiment of the present invention.

[0063] As shown in FIG. 11, in the second embodiment, the step of controlling the RF energy (S1300) so as to deliver multi-frequency RF energy may include a heating section control step (S1310) of adjusting RF energy by a high-frequency pulse train of a first frequency for deep heating depth in tissue, and a heating section control step (S1320) of adjusting RF energy by a high-frequency train of a third frequency for heating fat cells.

[0064] The heating section control step (S1310) of adjusting RF energy by a pulse train with a high frequency of the first frequency where the heating depth in the skin tissue is deep is performed in order to heat the tissue to the treatment temperature quickly at the beginning. At this time, when the temperature of the epidermis layer, the dermis layer, and the hypodermis rises to a certain temperature or higher, the efficiency of RF energy transmission to the deep fat layer increases. Therefore, the control unit increases the frequency of the first frequency so that the epidermis layer, the dermis layer, the hypodermis, and the 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 that in step (S1320) described below.

[0065] The heating section control step (S1320) of adjusting RF energy by a high frequency train of the third frequency for heating fat cells corresponds to a step of adjusting RF energy to maintain tissue at a treatment temperature. The control unit may perform control to maintain the fat layer, which has a higher specific heat and a somewhat slower temperature rise than the epidermis or dermis, at a treatment temperature. As an example, the control unit may control the RF energy by increasing the frequency of selecting 13.56 MHz as the third frequency capable of selectively heating the fat layer. Here, selective heating of the fat layer means that when RF energy is delivered at the third frequency, the fat layer is heated because the fat layer has a higher RF energy absorption rate than other layers of the skin tissue.

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

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

[0068] FIG. 12 is a flowchart of a method for remodeling a face shape according to a third embodiment of the present invention.

[0069] As shown in FIG. 12, the third embodiment of the present invention, a method for remodeling a face shape, may include a step of adhering an electrode to the skin (S2100), a step of transmitting RF energy to tissue (S2200), and a step of transmitting the RF energy adjusted at multiple frequencies to the tissue to treat a fat layer (S2100).

[0070] The step of attaching electrodes to the skin (S2100) corresponds to a step of attaching electrodes to tissues of the patient's skin that the user judges to require treatment. The user (or medical staff) selects areas that require treatment due to changes in the facial shape, and attaches electrodes capable of transmitting RF energy to the skin.

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

[0072] The step of treating the fat layer by delivering the RF energy adjusted with multiple frequencies to the tissue (S2100) corresponds to a step of adjusting the heated portion according to depth in the tissue while adjusting the frequency of the RF energy. The skin tissue includes an epidermis layer, a dermis layer, a hypodermis, and a fat layer, and each layer has a different temperature for treatment. The epidermis layer and the dermis layer cause degeneration for tissue remodeling, and the temperature of the tissue for degeneration may be 70°C to 80°C. Meanwhile, fat treatment may be performed by heating at 44°C to 46°C for the death of fat cells and maintaining the temperature for a predetermined period of time. This step (S2300) is performed to prevent excessive damage to the epidermis layer and the dermis layer and to maintain the fat layer at a treatment temperature. In this step, the multiple frequencies may include a first frequency for heating the epidermis, dermis, and hypodermis, a second frequency for heating up to the dermis layer, and a third frequency for selectively heating fat. In this step, the frequencies of the first frequency, the second frequency, and the third frequency may differ from each other depending on the treatment mode.

[0073] That is, in this step, in the early treatment mode, the epidermis, dermis, and hypodermis are heated more frequently, and in the late treatment mode, the heating frequency of the epidermis, dermis, and hypodermis can be reduced. Also, in the early treatment mode, the heating frequency of the fat layer can be reduced, and in the late treatment mode, the heating frequency of the fat layer can be increased.

[0074] Meanwhile, the third embodiment of the present invention may be repeatedly performed multiple times for treatment on the face, i.e., the third embodiment of the present invention may be repeatedly performed while changing the area to which the RF energy is delivered.

[0075] FIG. 13 is a detailed flow chart of the third embodiment.

[0076] As shown in FIG. 13, in the third embodiment, the step of transmitting the RF energy to the tissue to treat the fat layer (S2100) may include a heating step (S2310) of increasing the frequency of selecting a frequency capable of heating deep within the tissue, and a maintaining step (S2320) of increasing the frequency of selectively transmitting the RF energy to fat cells within the tissue.

[0077] The heating step (S2310) of increasing the frequency of transmitting the RF energy to a deeper part of the tissue corresponds to a step of rapidly increasing the temperature of the epidermis, dermis, and hypodermis to increase the transmission efficiency of the RF energy according to the mode of transmission of the RF energy. At this time, the frequency may 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 frequency of the RF energy in the first and second frequency ranges may be higher than the frequency of selecting the frequency in the third frequency range.

[0078] The maintaining step (S2320) of increasing the frequency of delivery of the RF energy to fat cells in the tissue corresponds to a step of increasing the frequency of RF energy of the third frequency to maintain the temperature of the fat layer at a treatment temperature. Even during the execution of this step, RF energy of the first frequency and the second frequency may be repeatedly delivered to maintain the temperature of the epidermis, dermis, and hypodermis. Meanwhile, in this step (S2320), the frequency of selection of the third frequency may be higher than that of the heating step (S2310).

[0079] Meanwhile, 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, the control method thereof, and the method for remodeling facial shape using the same according to the present invention have the effect of increasing the treatment efficiency by performing skin treatment using RF energy of various frequencies with different energy transmission depths within the tissue. [Explanation of symbols]

[0081] 100 electrodes 500 Control section

Claims

1. A main body including an RF generating unit and an RF adjusting unit; a handpiece connected to the main body and having an electrode on one side thereof so as to transmit RF energy transmitted from the main body to the skin; A control unit that controls the RF adjustment unit so as to transmit the RF energy of multiple frequencies; A skin treatment device for remodeling facial contours using RF energy, comprising:

2. The control unit is 10. The skin treatment device for remodeling facial contours using RF energy as recited in claim 1, wherein said RF energy is controlled by a pulse train including at least three different frequencies.

3. The pulse train includes a first frequency, a second frequency, and a third frequency that exhibit different heating depths in skin tissue, 3. The skin treatment device for remodeling facial contours using RF energy as recited in claim 2, wherein the third frequency is selected as a frequency capable of selectively heating fat cells.

4. The control unit is The section in which the RF energy is transmitted is divided into a heating phase and a holding phase, 4. The skin treatment device for remodeling facial features using RF energy according to claim 3, wherein the ratios of the first frequency, the second frequency, and the third frequency constituting the pulse train are configured to be different from each other in the heating section and the maintaining section.

5. The control unit controls the pulse train as follows:

5. The skin treatment device for remodeling a face shape using RF energy as claimed in claim 4, wherein the frequency of the first frequency is higher in the heating section than in the maintaining section.

6. The control unit controls the pulse train as follows:

5. The skin treatment device for remodeling a face shape using RF energy as claimed in claim 4, wherein the frequency of the third frequency is higher in the maintaining section than in the heating section.

7. the first frequency is between 1 and 3 MHz; the second frequency is between 3 and 10 MHz; 5. The skin treatment device for remodeling facial contour using RF energy as recited in claim 4, wherein the third frequency is between 10 and 30 MHz.

8. generating RF energy from an RF generator; transmitting said RF energy to an electrode; controlling RF energy when delivering RF energy to the electrode such that multi-frequency RF energy can be delivered; A method for controlling a skin treatment device for remodeling facial contours using RF energy, comprising:

9. The step of controlling RF energy includes:

10. The method of claim 8, wherein the RF energy is controlled by a pulse train including at least three different frequencies.

10. The pulse train includes a first frequency, a second frequency, and a third frequency that exhibit different heating depths in skin tissue, Of the three frequencies, The first frequency is selected as a frequency capable of heating the skin surface to the hypodermis; The second frequency is selected as a frequency capable of heating the skin surface to the dermis layer, 10. The method of claim 9, wherein the third frequency is selected as a frequency capable of selectively heating fat cells.

11. The step of controlling RF energy includes: The heating section control step and the maintaining section control step are included, 10. The method of claim 9, wherein the ratios of the first frequency, the second frequency, and the third frequency constituting the pulse train are configured to be different from each other in the heating section control step and the maintenance section control step.

12. The heating section control step includes:

12. The method of claim 11, wherein the first frequency is greater than the sustain interval control step in the pulse train.

13. The maintaining section control step includes:

12. The method of claim 11, wherein the third frequency is greater than the heating interval control step in the pulse train.

14. the first frequency is between 1 and 3 MHz; the second frequency is between 3 and 10 MHz; 12. The method of claim 11, wherein the third frequency is between 10 and 30 MHz.

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