Hair removal instrument and lighting circuit thereof

Abstract

The utility model relates to the field of depilation instruments, and provides a depilation instrument and a lighting circuit thereof. The lighting circuit of the hair removal instrument comprises a light emitting unit, a power supply unit and a voltage doubling unit. N light sources connected in series are configured in the light emitting unit, and N is an integer greater than or equal to 2, that is, at least two light sources can simultaneously trigger the pulsed light, so that the action area of the pulsed light is increased. The power supply unit is used for providing electric energy, and the voltage-multiplying unit is connected between the light-emitting unit and the power supply unit, so that the voltage-multiplying unit can be charged according to the electric energy provided by the power supply unit. The charged voltage-multiplying unit and the charged power supply unit are equivalent to two power supply units connected in series to supply power to the light-emitting unit, so that the power utilization requirement of N light sources connected in series in the light-emitting unit is met, and the light-emitting unit can trigger pulsed light according to the target voltage. Therefore, a new lighting scheme is provided.

Description

Technical Field

[0001] The present application relates to the field of hair removal devices, and in particular to a hair removal device and a lighting circuit thereof. Background Art

[0002] As people's demand for skin care grows, it's no longer limited to the face, but extends to skin across the body. Since human skin is covered with abundant hair, hair removal has become an essential part of the skin care process. Consequently, demand for hair removal devices is also growing. Hair removal devices use a light-emitting unit to trigger pulsed light that acts on the skin, inhibiting hair growth.

[0003] However, while existing hair removal devices can trigger pulsed light, the area of ​​effect of a single pulse is relatively small. Increasing the area of ​​effect requires increasing the number of light sources in the light-emitting unit. Consequently, the existing lighting circuitry in hair removal devices is incompatible with this increased number of light sources. Therefore, developing a new lighting solution is an urgent issue. Utility Model Content

[0004] The purpose of the present application is to provide a hair removal device and a lighting circuit thereof, which provides a new lighting solution for a hair removal device that increases the number of light sources in a light-emitting unit.

[0005] A first aspect of an embodiment of the present application provides a lighting circuit for a hair removal device, comprising:

[0006] A light-emitting unit comprising N light sources connected in series, wherein N is an integer equal to or greater than 2;

[0007] a power supply unit, for providing electrical energy;

[0008] a voltage doubling unit connected between the light emitting unit and the power supply unit, the voltage doubling unit being used to charge according to the electric energy provided by the power supply unit;

[0009] The light emitting unit is used to trigger pulse light according to the target voltage provided by the voltage doubling unit; wherein the target voltage is equal to the sum of the voltage of the electric energy provided by the power supply unit and the voltage after the voltage doubling unit is charged.

[0010] A first aspect of an embodiment of the present application provides a hair removal device, comprising the lighting circuit of the hair removal device provided in the first aspect above.

[0011] Compared to the prior art, the present embodiment of the utility model has the following advantages: the lighting circuit of the hair removal device comprises a light-emitting unit, a power supply unit, and a voltage multiplier unit. The light-emitting unit comprises N light sources connected in series. The power supply unit is configured to provide electrical energy. The voltage multiplier unit is connected between the light-emitting unit and the power supply unit, allowing the voltage multiplier unit to be charged based on the electrical energy provided by the power supply unit. Thus, a target voltage equal to the sum of the voltage of the alternating current and the voltage of the voltage multiplier unit after charging is output to the light-emitting unit. In the above scheme, the light-emitting unit is configured with N light sources connected in series, where N is an integer greater than 2. This means that at least two light sources can simultaneously trigger pulsed light, thereby increasing the effective area of ​​the pulsed light. Here, the N light sources in the light-emitting unit are connected in series, and their required voltage is increased compared to a single light source. The power supply unit provides electrical energy, and the voltage multiplier unit is connected between the light-emitting unit and the power supply unit, allowing the voltage multiplier unit to be charged based on the electrical energy provided by the power supply unit. The voltage of the charged voltage-doubling unit, combined with the voltage of the electric energy provided by the power supply unit, acts as the target voltage on the light-emitting unit, thereby meeting the power requirements of the N light sources connected in series within the light-emitting unit. This allows the light-emitting unit to trigger pulsed light according to the target voltage. This increases the number of light sources in the light-emitting unit to expand the area of ​​pulsed light action while also providing a compatible power supply solution, offering a new lighting solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic structural diagram of a lighting circuit of a hair removal device provided in an embodiment of the present application;

[0013] Figure 2 A schematic diagram of the specific structure of a lighting circuit of a hair removal device provided in an embodiment of the present application Figure 1 ;

[0014] Figure 3 A schematic structural diagram of a lighting circuit of a hair removal device provided in another embodiment of the present application;

[0015] Figure 4 A schematic structural diagram of a lighting circuit of a hair removal device provided in yet another embodiment of the present application;

[0016] Figure 5 A schematic diagram of the specific structure of a lighting circuit of a hair removal device provided in another embodiment of the present application Figure 2 ;

[0017] Figure 6 A schematic diagram of the specific structure of a voltage doubling unit in a lighting circuit of a hair removal device provided in an embodiment of the present application;

[0018] Figure 7 A specific circuit diagram of a voltage doubling unit in a lighting circuit of a hair removal device provided in an embodiment of the present applicationFigure 1 ;

[0019] Figure 8 A specific circuit diagram of a voltage doubling unit in a lighting circuit of a hair removal device provided in an embodiment of the present application Figure 2 ;

[0020] Figure 9 This is a structural schematic diagram of a hair removal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0022] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0023] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0025] As people's demand for skin care grows, it's no longer limited to the face, but extends to skin across the body. Since human skin is covered with abundant hair, hair removal has become an essential part of the skin care process. Consequently, demand for hair removal devices is also growing. Hair removal devices use a light-emitting unit to trigger pulsed light that acts on the skin, inhibiting hair growth.

[0026] However, while existing hair removal devices can trigger pulsed light, the area affected by a single pulse is relatively small. Increasing the area affected by the pulsed light requires increasing the number of light sources in the light-emitting unit. Consequently, the existing lighting circuitry in the hair removal device is no longer compatible with the increased number of light sources. Therefore, developing a new lighting solution is an urgent issue.

[0027] To solve the above-mentioned technical problems, an embodiment of the present application provides a hair removal device and a lighting circuit thereof. The lighting circuit of the hair removal device includes a light-emitting unit, a power supply unit, and a voltage doubling unit. The light-emitting unit includes N light sources connected in series. The power supply unit is used to provide electrical energy. The voltage doubling unit is connected between the light-emitting unit and the power supply unit, so that the voltage doubling unit can be charged based on the electrical energy provided by the power supply unit. Thus, a target voltage equal to the sum of the voltage of the alternating current and the voltage of the voltage doubling unit after charging is output to the light-emitting unit.

[0028] In the above scheme, N light sources connected in series are configured in the light-emitting unit, and N is an integer equal to or greater than 2, that is, at least two light sources can trigger pulse light at the same time, thereby increasing the effective area of ​​the pulse light. Here, the N light sources in the light-emitting unit are connected in series, and their required voltage is increased compared to that of a single light source. The power supply unit provides electric energy, and the voltage doubling unit is connected between the light-emitting unit and the power supply unit, so that the voltage doubling unit can be charged according to the electric energy provided by the power supply unit. Then, the voltage of the charged voltage doubling unit and the electric energy voltage provided by the power supply unit act on the light-emitting unit as the target voltage, thereby meeting the power demand of the N light sources connected in series in the light-emitting unit, so that the light-emitting unit can trigger pulse light according to the target voltage. Thus, while increasing the number of light sources in the light-emitting unit to increase the effective area of ​​the pulse light, it also provides a power supply scheme adapted thereto, providing a new lighting scheme.

[0029] See Figure 1 , Figure 1 The following is a schematic diagram of the structure of a lighting circuit of a hair removal device provided in an embodiment of the present application. For ease of explanation, only the parts related to this embodiment are shown, which are detailed as follows:

[0030] exist Figure 1 In the embodiment, the lighting circuit 100 of the hair removal device includes: a light emitting unit 10, a power supply unit 20 and a voltage multiplier unit 30. Specifically:

[0031] The light-emitting unit 10 includes N light sources 11 connected in series, where N is an integer greater than or equal to 2. A power supply unit 20 is configured to provide electrical energy. A voltage multiplier unit 30 is connected between the light-emitting unit 10 and the power supply unit 20. The voltage multiplier unit 30 is configured to charge the light-emitting unit 10 based on the electrical energy provided by the power supply unit 20. The light-emitting unit 10 is configured to trigger pulsed light based on a target voltage provided by the voltage multiplier unit 30. The target voltage is equal to the sum of the voltage of the electrical energy provided by the power supply unit 20 and the voltage after the voltage multiplier unit 30 is charged.

[0032] In this embodiment, since the light-emitting unit 10 includes N light sources 11 connected in series, the power consumption of the light-emitting unit 10 depends on the actual number of the N light sources 11. In a specific implementation, the light source 11 may include an intense pulsed light source, such as an electrode fluorescent lamp, or a fluorescent tube filled with an inert gas, for example, at least one of a helium fluorescent lamp, a neon fluorescent lamp, and a xenon fluorescent lamp.

[0033] In some embodiments, the light source may further include at least one of a near-infrared light source and a narrow-spectrum light source.

[0034] In some related solutions, multiple light sources are connected in parallel to form a light-emitting unit to increase the number of light sources needed to trigger the pulsed light. This can lead to higher currents in the circuit due to the parallel connection of multiple light sources, and accordingly, the specifications of various components in the circuit need to be reconfigured. This also requires the use of higher-specification components for circuit construction, increasing implementation costs. Furthermore, the high current can easily cause the circuit temperature to rise rapidly, which is not conducive to the temperature control requirements of the hair removal device.

[0035] Unlike related solutions, in all embodiments of this application, the N light sources 11 configured in the light-emitting unit 10 are connected in series, which can trigger pulsed light in a low-current environment. Furthermore, there is no need to re-select other components for re-matching, which can reduce implementation costs and better meet the temperature control requirements of the hair removal device.

[0036] It is easy to understand that the N light sources 11 connected in series in the light emitting unit 10 can be regarded as a load. Accordingly, after being charged, the voltage doubling unit 30 and the power supply unit 20 are equivalent to two power supplies or batteries connected in series, supplying power to the N light sources 11 connected in series.

[0037] In a specific implementation, the electric energy provided by the power supply unit 20 may be a jump voltage, such as a voltage that jumps according to a certain rule, an alternating current voltage, etc.

[0038] It can be understood that in all embodiments of the present application, the target voltage refers to the operating voltage provided by the voltage doubling unit 30 to the light-emitting unit 10 in combination with the power supply unit 20 after charging. Specifically, the voltage doubling unit 30 outputs the target voltage to the N light sources 11 connected in series. Since the N light sources 11 are connected in series, when the target voltage is output to cause the light-emitting unit 10 to trigger the pulse light, the N light sources 11 are all turned on to trigger the pulse light. Therefore, the voltage / voltage difference between the two nodes connected to the N light sources 11 in series and the voltage doubling unit 30 is numerically equal to the target voltage. Based on this, in the specific implementation, the specific voltage of the target voltage can be determined according to the voltage / voltage difference required by the N light sources 11 in series.

[0039] For example, the normal operating voltage U of one light source 11 is taken as an example. When N light sources are connected in series, the normal operating voltage of the light-emitting unit 10 is at least NU. That is, the target voltage is at least equal to NU. Let the voltage after the voltage doubling unit 30 is charged be U1, and the electric energy voltage provided by the power supply unit 20 be U2. In a specific implementation, the sum of the voltage U1 after the voltage doubling unit 30 is charged and the electric energy voltage U2 provided by the power supply unit 20 can be made equal to NU, so as to provide the target voltage for the N light sources 11 connected in series.

[0040] In all embodiments of the present application, the power supply unit 20 can be charged by providing AC power to the voltage multiplier unit 30. In a specific implementation, the power supply unit 20 can include a step-up / step-down circuit, or an inverter circuit.

[0041] like Figure 2 As shown, as an embodiment, the power supply unit 20 includes a transformer T1. The secondary coil of the transformer T1 is connected to the voltage multiplier unit 30. The transformer T1 is used to output AC power through the secondary coil for charging the voltage multiplier unit 30.

[0042] Exemplarily, the power supply unit 20 may be connected to the mains, and utilize the transformer T1 to step up or down the initial alternating current provided by the mains, and then output the alternating current through the secondary coil of the transformer T1.

[0043] In some embodiments, the power supply unit 20 may further include a battery and an inverter circuit. The inverter circuit inverts the DC power provided by the battery to generate initial AC power. This initial AC power is then stepped up or down by a transformer T1, and the AC power is output through the secondary winding of the transformer T1.

[0044] It can be understood that since AC-DC conversion can be achieved using an existing half-bridge inverter circuit, a full-bridge inverter circuit or a push-pull inverter circuit, and the voltage conversion of AC power can be achieved using a transformer, we will not go into details here about how the power supply unit 20 outputs AC power through the secondary coil of the transformer T1.

[0045] In this embodiment, since the voltage doubling unit 30 is connected between the secondary coil of the transformer T1 of the power supply unit 20 and the light-emitting unit 10, the voltage doubling unit 30 can be charged based on the AC power provided by the power supply unit 20. Here, when the voltage doubling unit 30 is charged to a certain voltage value, the voltage doubling unit 30 can be regarded as another power supply unit, that is, it is connected in series with the power supply unit 20 to provide working power for the light-emitting unit 10. In a specific implementation, the voltage doubling unit 30 may include a charging circuit composed of a rectifier device and an energy storage device. Among them, the rectifier device can rectify the AC power, and the obtained DC power can be used to charge the energy storage device, thereby realizing that the voltage doubling unit 30 is charged according to the AC power.

[0046] In the above scheme, N light sources connected in series are configured in the light-emitting unit, and N is an integer equal to or greater than 2, that is, at least two light sources can trigger pulse light at the same time, thereby increasing the effective area of ​​the pulse light. Here, the N light sources in the light-emitting unit are connected in series, and their required voltage is increased compared to that of a single light source. The power supply unit provides electric energy, and the voltage doubling unit is connected between the light-emitting unit and the power supply unit, so that the voltage doubling unit can be charged according to the electric energy provided by the power supply unit. Then, the voltage of the charged voltage doubling unit and the electric energy voltage provided by the power supply unit act on the light-emitting unit as the target voltage, thereby meeting the power demand of the N light sources connected in series in the light-emitting unit, so that the light-emitting unit can trigger pulse light according to the target voltage. Thus, while increasing the number of light sources in the light-emitting unit to increase the effective area of ​​the pulse light, it also provides a power supply scheme adapted thereto, providing a new lighting scheme.

[0047] Figure 3 FIG2 is a schematic diagram showing the structure of a lighting circuit of a hair removal device provided in another embodiment of the present application. As an embodiment, the lighting circuit 100 of the hair removal device further includes: a control unit 40 and a switch unit 50.

[0048] exist Figure 3 In the embodiment, the switch unit 50 is connected to the control unit 40, and the switch unit 50 is connected between the light emitting unit 10 and the ground. The control unit 40 is used to control the switch unit 50 to be turned on or off, so that the ground path between the voltage doubling unit 30 and the light emitting unit 10 is turned on or off.

[0049] In this embodiment, the switch unit 50 is connected between the light-emitting unit 10 and the ground, that is, the switch unit 50 is connected to the ground path between the voltage multiplier unit 30 and the light-emitting unit 10. Since the switch unit 50 is controlled by the control unit 40, the control unit 40 can be used to control the switch unit 50 to be on and off to achieve on-off control of the ground path.

[0050] In a specific implementation, the switch unit 50 can be a circuit including an electronic switch or a switch circuit built with a switch tube. By connecting the control end of the electronic switch or the control end of the switch circuit to the control unit 40, the control unit 40 can realize on-off control of the switch unit 50.

[0051] It should be noted that when the light unit 10 triggers the pulsed light, although the target voltage is output to the N light sources 11 in series, the switch unit 50 is connected to the ground path, so when the switch unit 50 is turned off, because the target voltage does not form a loop with the ground, the pulsed light is not triggered at this time.

[0052] In a specific implementation, the control unit 40 can realize on-off control of the switch unit 50 by outputting a pulse width modulation (PWM) signal. For example, the PWM signal includes a high level and a low level in a unit period, wherein the high level is used to control the switch unit 50 to be turned on, and the duration of the high level is the pulse width, that is, the duration of the high level represents the on duration. The low level is used to control the switch unit 50 to be turned off, that is, the duration of the low level represents the off interval.

[0053] Based on this, as an embodiment, the control unit 40 can also control the on duration and / or the off interval of the switch unit 50 according to the actual light energy demand of the pulsed light output. That is, the control unit 40 can control the energy of the pulsed light triggered by the light unit 10 by controlling the on duration of the switch unit 50.

[0054] For example, the longer the on duration of the switch unit 50 controlled by the control unit 40, the greater the energy of the pulsed light triggered by the light unit 10. Conversely, the shorter the on duration of the switch unit 50 controlled by the control unit 40, the smaller the energy of the pulsed light triggered by the light unit 10.

[0055] For another example, the longer the off duration of the switch unit 50 controlled by the control unit 40, the smaller the energy of the pulsed light triggered by the light unit 10. Conversely, the shorter the off duration of the switch unit 50 controlled by the control unit 40, the greater the energy of the pulsed light triggered by the light unit 10.

[0056] For another example, the shorter the off interval of the switch unit 50 controlled by the control unit 40, the greater the energy of the pulsed light triggered by the light unit 10. Conversely, the longer the off interval of the switch unit 50 controlled by the control unit 40, the smaller the energy of the pulsed light triggered by the light unit 10.

[0057] In the embodiment, the switch unit is connected between the light-emitting unit and the ground, and the switch unit is controlled to be turned on and turned off by the control unit, so that the energy of the triggered pulse light can be adjusted and controlled. In addition, the working mode and / or use scene of the hair removal instrument can be enriched.

[0058] Figure 4 A structure diagram of a light-emitting circuit of a hair removal instrument is shown. Figure 3 The difference between the embodiment shown and the embodiment shown in FIG. 1 is that Figure 4 The light-emitting circuit 100 of the hair removal instrument shown further includes an anti-reverse unit 60.

[0059] As shown in FIG. 2, the anti-reverse unit 60 is connected between the switch unit 50 and the light-emitting unit 10. The anti-reverse unit 60 is used to prevent reverse current when the ground path is turned on. Figure 4

[0060] In the embodiment, the anti-reverse unit 60 can be a unidirectional circuit, that is, only allows current to flow from the light-emitting unit 10 to the switch unit 50.

[0061] In a specific implementation, the anti-reverse unit 60 can be a clamping circuit, which can prevent reverse current when the ground path is turned on by clamping voltage. Alternatively, the anti-reverse unit 60 can include an input node of a voltage source, and by inputting a voltage of a certain amplitude to the node, the function of clamping voltage can also be achieved, thereby avoiding the phenomenon of reverse current when the ground path is turned on.

[0062] As an embodiment, the anti-reverse unit 60 can specifically include an anti-reverse diode. The anode of the anti-reverse diode is used to connect the light-emitting unit 10, and the cathode of the anti-reverse diode is used to connect the switch unit 50. Based on this, when the switch unit 50 is controlled to be turned on by the control unit 40, under the characteristic of unidirectional conduction of the diode, the reverse current cannot flow to the light-emitting unit 10 through the diode, thereby preventing the reverse current.

[0063] Figure 5 A specific structure diagram of a light-emitting circuit of a hair removal instrument is shown. Figure 2 As shown in FIG. 3, as an embodiment, the light-emitting unit 10 includes a first potential end 101 and a second potential end 102. The voltage doubling unit 30 includes a first power supply end 301 and a second power supply end 302. As shown in FIG. 3, the first potential end 101 is connected to the first power supply end 301, and the second potential end 102 is connected to the second power supply end 302. Figure 5 Figure 5

[0064] ​​​In this embodiment, the light-emitting unit 10 includes N light sources 11 connected in series. Here, the N light sources 11 connected in series can be regarded as a load in the lighting circuit. Accordingly, the first potential end 101 of the light-emitting unit 10 can specifically be the first potential end of the load, and the second potential end 102 of the light-emitting unit 10 can be the second potential end of the load. The first power supply end 301 of the voltage doubling unit 30 is connected to the first potential end 101 of the light-emitting unit 10, and the second power supply end 302 of the voltage doubling unit 30 is connected to the second power supply end 302 of the light-emitting unit 10, so that the target voltage can be applied to the load. That is, a suitable operating voltage / voltage difference is provided for the N light sources 11 connected in series.

[0065] It is easy to understand that in a specific implementation, the voltage doubling unit 30 can be configured with multiple sets of potential pairs (i.e., multiple sets of first potential terminals and second potential terminals), and different potential pairs can output target voltages of different voltage values ​​to adapt to different light-emitting units 10. For example, when the number of light sources 11 connected in series in the light-emitting unit 10 is large, the potential pair in the voltage doubling unit 30 that outputs a larger target voltage can be connected.

[0066] Figure 6 The specific structural diagram of the voltage doubling unit in the lighting circuit of a hair removal device provided in an embodiment of the present application is shown. As an embodiment, in Figure 6 In the illustrated embodiment, the voltage doubling unit 30 includes M groups of charging units 31 connected in cascade, where M is an integer greater than 2.

[0067] like Figure 6 As shown, in this embodiment, the first input terminal of the first group of charging units 31 in the M groups of charging units is connected to the first connection terminal of the secondary coil of the transformer T1. The second input terminal of the first group of charging units 31 in the M groups of charging units is connected to the second connection terminal of the secondary coil of the transformer T1. The first input terminal of the Mth group of charging units is connected to the first connection terminal of the M-1th group of charging units, and the second input terminal of the Mth group of charging units is connected to the second connection terminal of the M-1th group of charging units. Figure 6 In the embodiment, the first connection end of the M-th group of charging units 31 serves as the first power supply end 301 , and the second connection end of the M-th group of charging units 31 serves as the second power supply end 302 .

[0068] It is easy to understand that M is an integer equal to or greater than 2. When M is equal to 2, the M-1th group of charging units is the first group of charging units, and the Mth group of charging units is the second group of charging units.

[0069] Taking M equal to 2 as an example, the first input terminal of the first group of charging units 31 is connected to the first connection terminal of the secondary coil of transformer T1. The second input terminal of the first group of charging units 31 is connected to the second connection terminal of the secondary coil of transformer T1. The first input terminal of the second group of charging units is connected to the first connection terminal of the first group of charging units, and the second input terminal of the second group of charging units is connected to the second connection terminal of the first group of charging units. Accordingly, the first connection terminal of the second group of charging units 31 serves as the first power supply terminal 301, and the second connection terminal of the second group of charging units 31 serves as the second power supply terminal 302.

[0070] Taking M equal to 3 as an example, the first input terminal of the first group of charging units 31 is connected to the first connection terminal of the secondary coil of transformer T1. The second input terminal of the first group of charging units 31 is connected to the second connection terminal of the secondary coil of transformer T1. The first input terminal of the second group of charging units is connected to the first connection terminal of the first group of charging units, and the second input terminal of the second group of charging units is connected to the second connection terminal of the first group of charging units. Similarly, the first connection terminal of the second group of charging units 31 is connected to the first input terminal of the third group of charging units, and the second connection terminal of the second group of charging units 31 is connected to the second input terminal of the third group of charging units. Here, the first connection terminal of the third group of charging units 31 serves as the first power supply terminal 301, and the second connection terminal of the third group of charging units 31 serves as the second power supply terminal 302.

[0071] In a specific implementation, the charging unit 31 can specifically be a charging circuit with the same structure. For example, the charging unit 31 can specifically be a charging circuit including a charging device and a rectifier device. The rectifier device can rectify the alternating current, and then use the rectified electrical energy to charge the energy storage device. As for the number of charging units 31 set, it can be determined according to the target voltage requirement. Since the target voltage requirement depends on the specific number of N light sources, the larger the number of N, the larger the number of M. In other words, there is a positive correlation between N and M.

[0072] Figure 7 A specific circuit diagram of a voltage doubling unit in a lighting circuit of a hair removal device provided in an embodiment of the present application Figure 1 .like Figure 7As shown, as an embodiment, the charging unit 31 includes a first capacitor C1, a second capacitor C2, a first diode D1, and a second diode D2. The first end of the first capacitor C1 serves as a first input end, the second end of the first capacitor C1 is connected to the cathode end of the first diode D1 to form a first node P1, the anode end of the second diode D2 is connected to the first node P1, the anode end of the second diode D2 serves as a first connection end, the anode end of the first diode D1 is connected to the first end of the second capacitor C2 to form a second node P2, the second node P2 serves as a second input end, the second end of the second capacitor C2 is connected to the cathode end of the second diode D2, and the cathode end of the second diode D2 serves as a second connection end.

[0073] In this embodiment, the M groups of charging units 31 are all voltage-doubling rectifier circuits with the same structure. Figure 7 As shown, each charging unit 31 includes a first capacitor C1, a second capacitor C2, a first diode D1, and a second diode D2. The first end of the first capacitor C1 serves as a first input terminal and is connected to a first tap of the secondary winding of the transformer T1. The second tap of the secondary winding of the transformer T1 is connected to a second node P2.

[0074] For ease of understanding, the AC power output by the secondary coil of transformer T1 is divided into a positive half-cycle and a negative half-cycle for explanation.

[0075] During the first negative half cycle of the AC power, the first diode D1 in the first charging unit 31 is turned on, and the other diodes are turned off. The AC power applies energy to the first capacitor C1 via the first diode D1, charging the first capacitor C1. The voltage of the charged first capacitor C1 is U.

[0076] During the first positive half-cycle of the AC power, the second diode D2 in the first charging unit 31 conducts, while the other diodes are off. At this point, the electrical energy applied to the second capacitor C2 via the second diode D2 comes from the AC power and the first capacitor C1. In other words, the AC voltage from the secondary winding of transformer T1, combined with the voltage from the first capacitor C1, charges the second capacitor C2. The voltage of the charged second capacitor C2 is 2U.

[0077] During the second negative half-cycle of the AC power, the first diode D1 in the second group of charging units 31 is turned on, and the other diodes are turned off. At this time, the voltage of the first capacitor C1 in the first group of charging units 31 (voltage U) is opposite to the voltage (-U) currently provided by the secondary side of the transformer T1, and they can cancel each other out. Therefore, the actual electrical energy applied to the first capacitor C1 via the first diode D1 comes from the second capacitor C2 in the first group of charging units 31. Since the voltage of the second capacitor C2 in the first group of charging units 31 after charging is 2U, the voltage of the first capacitor C1 in the second group of charging units 31 after charging is approximately equal to 2U.

[0078] During the second positive half cycle of the alternating current, the second diode D2 in the second group of charging units 31 is turned on, and the other diodes are cut off. At this time, let the voltage provided by the secondary side of the transformer T1 be U, then the voltage of the second capacitor C2 in the first group of charging units 31 is -2U. The sum of the two is -U, which cancels out the voltage U of the first capacitor C1 in the first group of charging units 31. Therefore, the electric energy actually applied to the second capacitor C2 through the second diode D2 comes from the first capacitor C1 in the second group of charging units 31 (voltage is 2U). Since the voltage of the first capacitor C1 in the second group of charging units 31 after charging is approximately equal to 2U, the voltage of the second capacitor C2 in the second group of charging units 31 after charging is also approximately equal to 2U. By analogy, by superimposing M groups of charging units 31, the voltage doubling function can be achieved, thereby providing an adapted target voltage for the light-emitting unit 10.

[0079] It is easy to understand that, based on the unidirectional conductivity of diodes, in actual use, the cathode end of the first diode D1 or the cathode end of the second diode D2 in one of the M power supply units 31 can be selected as the first power supply terminal 301, depending on the specific number of light sources 11 in the light-emitting unit 10. Here, when the cathode end of any second diode D2 is selected as the first power supply terminal 301, the corresponding second power supply terminal 302 serves as the second tap of the secondary winding of the transformer T1. Similarly, when the cathode end of any first diode D1 is selected as the first power supply terminal 301', the corresponding second power supply terminal 302' serves as the first tap of the secondary winding of the transformer T1.

[0080] Figure 8 A specific circuit diagram of a voltage doubling unit in a lighting circuit of a hair removal device provided in an embodiment of the present application Figure 2 .like Figure 8 As shown, as an embodiment, the charging unit includes a capacitor C and a diode D.

[0081] In the Xth group of charging units among the M groups of charging units, the first end of the capacitor C serves as the first input end, the second end of the capacitor C is connected to the cathode end of the diode D to form a connection node P, the connection node P serves as the first connection end, and the second end of the diode D serves as the second input end and the second connection end; wherein X is an odd integer greater than 0.

[0082] In the Yth group of charging units among the M groups of charging units, the anode end of the diode D serves as the first input end and the first connection end, the first end of the capacitor C serves as the second input end, the second end of the capacitor C is connected to the cathode end of the diode D to form a connection node P, and the connection node P serves as the second connection end; wherein Y is an even integer greater than 0.

[0083] It should be noted that Figure 7The difference between the shown embodiment and the present embodiment is that the charging unit 31 in the present embodiment only comprises a capacitor C and a diode D. That is, in the present embodiment, the charging unit 31 is not connected to the primary winding of the transformer Tl. In the present embodiment, the two adjacent Xth charging unit 31 and Yth charging unit 31 can form a charging unit 31 in the shown example. Figure 8 Figure 7

[0084] Figure 7 Figure 8 In the present embodiment, when the first negative half cycle of the AC power, the diode D in the 1st charging unit 31 is turned on, and the diodes in the other charging units 31 are turned off. At this time, the electric energy applied to the capacitor C via the diode D in the 1st charging unit 31 is derived from the AC power and the capacitor C in the 1st charging unit 31. That is, the AC voltage of the secondary winding of the transformer Tl and the voltage of the capacitor C in the 1st charging unit 31 are used to charge the capacitor C in the 2nd charging unit 31. The voltage of the capacitor C in the 2nd charging unit 31 after charging is 2U.

[0085] In the second negative half cycle of the AC power, the diode D in the 3rd charging unit 31 is turned on, and the diodes in the other charging units 31 are turned off. At this time, the voltage of the capacitor C in the 1st charging unit 31 (the voltage is U) and the voltage provided by the secondary winding of the transformer Tl at present (-U) are opposite and can be offset. Therefore, the actual electric energy applied to the capacitor C via the diode D in the 3rd charging unit 31 is derived from the capacitor C in the 2nd charging unit 31. Since the voltage of the capacitor C in the 2nd charging unit 31 after charging is 2U, the voltage of the capacitor C in the 3rd charging unit 31 after charging is approximately equal to 2U.

[0086]

[0087] ​​​​​During the second positive half cycle of the alternating current, the diode D in the fourth group of charging units 31 is turned on, and the diodes in the other groups of charging units 31 are turned off. At this time, let the voltage provided by the secondary side of the transformer T1 be U, then the voltage of the capacitor C2 in the second group of charging units 31 is -2U, and the sum of the two is -U, which cancels out the voltage U of the capacitor C in the first group of charging units 31. Therefore, the electric energy actually applied to the capacitor C through the diode D in the fourth group of charging units 31 comes from the capacitor C in the third group of charging units 31 (the voltage is 2U). Since the voltage of the capacitor C in the third group of charging units 31 after charging is approximately equal to 2U, the voltage of the capacitor C in the fourth group of charging units 31 after charging is also approximately equal to 2U. By analogy, by superimposing M groups of charging units 31, the voltage doubling function can be achieved, thereby providing an adapted target voltage for the light-emitting unit 10.

[0088] It is easy to understand that, based on the unidirectional conductivity of diodes, in actual use, the cathode terminal of a diode D in one of the M power supply units 31 can be selected as the first power supply terminal 301 based on the specific number of light sources 11 in the light-emitting unit 10. Here, when the cathode terminal of the diode D2 in the Yth group of power supply units 31 is selected as the first power supply terminal 301, the corresponding second power supply terminal 302 serves as the second tap of the secondary winding of the transformer T1. Similarly, when the cathode terminal of the diode D in the Xth group of power supply units 31 is selected as the first power supply terminal 301', the corresponding second power supply terminal 302' serves as the first tap of the secondary winding of the transformer T1.

[0089] Figure 9 FIG. 1 shows a schematic structural diagram of a hair removal device provided in an embodiment of the present application. Figure 9 As shown, the hair removal device 200 includes the lighting circuit 100 of the hair removal device provided in any embodiment of the present application.

[0090] It is understandable that in Figure 9 In the embodiment shown, due to the improvements and specific implementation methods related to this application, Figures 1 to 8 The corresponding embodiments are described in detail, so they will not be described again here.

[0091] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0092] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A lighting circuit for a hair removal device, characterized in that: The lighting circuit includes: A light-emitting unit comprising N light sources connected in series, wherein N is an integer equal to or greater than 2; A power supply unit, used for providing electrical energy; a voltage doubling unit connected between the light emitting unit and the power supply unit, the voltage doubling unit being configured to charge according to the electric energy provided by the power supply unit; The light emitting unit is used to trigger pulse light according to a target voltage provided by the voltage doubling unit; wherein the target voltage is equal to the sum of the voltage of the electric energy provided by the power supply unit and the voltage after the voltage doubling unit is charged.

2. The lighting circuit according to claim 1, wherein: The power supply unit includes a transformer, a secondary coil of the transformer is connected to the voltage doubler unit, and the transformer is used to output alternating current through the secondary coil for charging the voltage doubler unit.

3. The lighting circuit according to claim 2, wherein: The light emitting unit includes a first potential end and a second potential end; The voltage doubling unit includes a first power supply end and a second power supply end; The first potential end is connected to the first power supply end, and the second potential end is connected to the second power supply end.

4. The lighting circuit according to claim 3, wherein: The voltage doubling unit includes M groups of cascaded charging units, where M is an integer greater than 2; The first input end of the charging unit of the first group among the M groups of charging units is connected to the first connection end of the secondary coil, and the second input end of the charging unit of the first group among the M groups of charging units is connected to the second connection end of the secondary coil; The first input end of the charging unit in the Mth group is connected to the first connection end of the charging unit in the M-1th group, the second input end of the charging unit in the Mth group is connected to the second connection end of the charging unit in the M-1th group, the first connection end of the charging unit in the Mth group serves as the first power supply end, and the second connection end of the charging unit in the Mth group serves as the second power supply end.

5. The lighting circuit according to claim 4, wherein: The charging unit includes a first capacitor, a second capacitor, a first diode and a second diode; The first end of the first capacitor serves as the first input end, the second end of the first capacitor is connected to the cathode end of the first diode to form a first node, the anode end of the second diode is connected to the first node, the anode end of the second diode serves as the first connection end, the anode end of the first diode is connected to the first end of the second capacitor to form a second node, the second node serves as the second input end, the second end of the second capacitor is connected to the cathode end of the second diode, and the cathode end of the second diode serves as the second connection end.

6. The lighting circuit according to claim 4, wherein: The charging unit includes a capacitor and a diode; In the Xth group of the M groups of charging units, the first end of the capacitor serves as the first input end, the second end of the capacitor is connected to the cathode end of the diode to form a connection node, the connection node serves as the first connection end, and the second end of the diode serves as the second input end and the second connection end; wherein X is an odd integer greater than 0; In the Yth group of charging units in the M groups of charging units, the anode end of the diode serves as the first input end and the first connection end, the first end of the capacitor serves as the second input end, the second end of the capacitor is connected to the cathode end of the diode to form a connection node, and the connection node serves as the second connection end; wherein Y is an even integer greater than 0.

7. The lighting circuit according to any one of claims 1 to 6, characterized in that: The light source includes an intense pulsed light source; or The light source includes an intense pulsed light source, and also includes at least one of a near-infrared light source and a narrow spectrum light source.

8. The lighting circuit according to any one of claims 1 to 6, wherein: Also includes: control unit; a switch unit connected to the control unit, and the switch unit is connected between the light-emitting unit and the ground; The control unit is used to control the switch unit to be turned on or off, so that the ground path between the voltage doubling unit and the light emitting unit is turned on or off.

9. The lighting circuit according to claim 8, wherein: Also includes: The anti-reverse unit is connected between the switch unit and the light-emitting unit, and is used to prevent reverse current when the ground path is turned on.

10. The lighting circuit according to claim 9, wherein: The anti-reverse unit includes an anti-reverse diode, an anode end of the anti-reverse diode is connected to the light emitting unit, and a cathode end of the anti-reverse diode is connected to the switch unit.

11. A hair removal device, characterized in that: A lighting circuit comprising the hair removal device according to any one of claims 1 to 10.

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