Pulse light source driving circuit and device

Abstract

The utility model discloses a pulse light source driving circuit and equipment, and relates to the technical field of beauty equipment. The pulse light source driving circuit comprises a power supply input end, a light source circuit, N charging and discharging circuits and a main control circuit. The input ends of the N charging and discharging circuits are connected with the input end of the power supply, and the output ends of the N charging and discharging circuits are connected with the input end of the light source circuit. N signal input ends of the main control circuit are respectively connected with detection ends of the N charging and discharging circuits, and N signal output ends of the main control circuit are respectively connected with controlled ends of the N charging and discharging circuits. Therefore, the main control circuit can respectively control the charging and discharging states of the N charging and discharging circuits according to the voltages of the N charging and discharging circuits so as to provide the pulse current required by the work of the light source circuit, and the pulse interval can be shortened, the pulse width can be prolonged, and the pulse energy density can be improved.

Description

Technical Field

[0001] This utility model relates to the field of beauty equipment technology, and in particular to a pulse light source driving circuit and device. Background Technology

[0002] Intense Pulsed Light (IPL) hair removal devices are widely used in personal and professional settings. They work by emitting light pulses of specific wavelengths to destroy melanin in hair follicles, thus achieving hair removal. The effectiveness of IPL technology depends on several key parameters, including energy density, power, pulse width, and pulse delay.

[0003] Currently, most home-use IPL hair removal devices on the market rely on single-capacitor charging and discharging technology to power the xenon lamp and generate the necessary light pulses. However, this method has drawbacks such as low output energy density, pulse width and duration failing to effectively match the thermal relaxation time of the hair follicle, and long pulse intervals, resulting in poor hair removal performance. Utility Model Content

[0004] The main purpose of this invention is to provide a pulse light source driving circuit, which aims to solve the problems of low energy density, pulse width-time mismatch, and long pulse interval time in existing pulse light source driving circuits.

[0005] To achieve the above objectives, the pulse light source driving circuit proposed in this utility model includes:

[0006] Power supply input terminal;

[0007] The light source circuit is used to convert pulsed current into pulsed light source output.

[0008] There are N charging and discharging circuits, the input terminals of which are all connected to the input terminal of the power supply, and the output terminals of which are all connected to the input terminal of the light source circuit; N is a positive integer greater than or equal to 2.

[0009] The main control circuit has N signal input terminals connected to the detection terminals of the N charging and discharging circuits, and N signal output terminals connected to the controlled terminals of the N charging and discharging circuits.

[0010] The main control circuit is used to detect the voltage of the N charging and discharging circuits, and control the charging / discharging of the N charging and discharging circuits respectively according to the voltage of the N charging and discharging circuits, so as to provide the required pulse current for the operation of the light source circuit.

[0011] In one embodiment, the pulsed light source driving circuit includes two of the charging and discharging circuits;

[0012] The input terminal of the first charging and discharging circuit is connected to the input terminal of the power supply, the output terminal of the first charging and discharging circuit is connected to the input terminal of the light source circuit, the detection terminal of the first charging and discharging circuit is connected to the first signal input terminal of the main control circuit, and the controlled terminal of the first charging and discharging circuit is connected to the first signal output terminal of the main control circuit.

[0013] The input terminal of the second charging and discharging circuit is connected to the input terminal of the power supply, the output terminal of the second charging and discharging circuit is connected to the input terminal of the light source circuit, the detection terminal of the second charging and discharging circuit is connected to the second signal input terminal of the main control circuit, and the controlled terminal of the second charging and discharging circuit is connected to the second signal output terminal of the main control circuit.

[0014] The main control circuit is used to control the charging / discharging of the first charging / discharging circuit and the second charging / discharging circuit according to the voltage of the first charging / discharging circuit and the voltage of the second charging / discharging circuit.

[0015] In one embodiment, the charging and discharging circuit includes:

[0016] Energy storage capacitor;

[0017] A voltage detection circuit is provided, wherein the detection terminal of the voltage detection circuit is connected to the energy storage capacitor, and the signal output terminal of the voltage detection circuit is connected to the main control circuit. The voltage detection circuit is used to detect the voltage value of the energy storage capacitor and output a corresponding voltage detection signal.

[0018] A discharge switch circuit is provided, wherein a first terminal of the discharge switch circuit is connected to the energy storage capacitor, a second terminal of the discharge switch circuit is connected to the input terminal of the light source circuit, and a controlled terminal of the discharge switch circuit is connected to the main control circuit; the discharge switch circuit is used to control the discharge / stop discharge of the energy storage capacitor in order to provide pulse current to the light source circuit.

[0019] The main control circuit is used to determine the voltage of the corresponding energy storage capacitor based on the voltage detection signal, and to control the operation of the discharge switch circuit based on the comparison result between the voltage of the energy storage capacitor and the preset voltage.

[0020] In one embodiment, the charging and discharging circuit further includes:

[0021] A charging switch circuit is provided, wherein a first terminal of the charging switch circuit is connected to the power supply input terminal, a second terminal of the charging switch circuit is connected to the energy storage capacitor, and a controlled terminal of the charging switch circuit is connected to the main control circuit; the charging switch circuit is used to control the energy storage capacitor to charge / stop charging according to a first control signal output by the main control circuit.

[0022] In one embodiment, the charging and discharging circuit further includes:

[0023] The discharge circuit has a first terminal connected to the energy storage capacitor, a second terminal grounded, and a controlled terminal connected to the main control circuit. The discharge circuit is used to release / stop releasing the charge of the energy storage capacitor according to a second control signal from the main control circuit.

[0024] In one embodiment, the discharge switch circuit includes a driver chip and a power transistor; the signal input terminal of the driver chip is connected to the signal output terminal of the main control circuit, the signal output terminal of the driver chip is connected to the controlled terminal of the power transistor, the first terminal of the power transistor is connected to the energy storage capacitor, and the second terminal of the power transistor is connected to the input terminal of the light source circuit.

[0025] The driver chip is used to drive the power transistor to turn on / off according to the third control signal output by the main control circuit.

[0026] In one embodiment, the pulsed light source driving circuit further includes:

[0027] The power supply circuit has a power input terminal for connecting to an external power input terminal, a power output terminal for connecting to the power input terminal, and an enable terminal for connecting to the main control circuit. The power supply circuit is used to operate or stop operating according to the fourth control signal output by the main control circuit.

[0028] In one embodiment, the pulsed light source driving circuit further includes:

[0029] An overvoltage detection circuit is provided, wherein a first terminal of the overvoltage detection circuit is connected to the enable terminal of the power supply circuit, N second terminals of the overvoltage detection circuit are respectively connected to the detection terminals of the N charging and discharging circuits, and the controlled terminal of the overvoltage detection circuit is connected to the main control circuit; the overvoltage detection circuit is used to detect the voltage of any one of the N charging and discharging circuits.

[0030] The power supply circuit is also used to operate / stop operating based on the detection result of the overvoltage detection circuit.

[0031] In one embodiment, the light source circuit includes:

[0032] A xenon lamp tube, wherein the first power supply terminal of the xenon lamp tube is connected to the output terminals of N charging and discharging circuits;

[0033] An ignition trigger circuit is provided, wherein the controlled terminal of the ignition trigger circuit is connected to the main control circuit, and the output terminal of the ignition trigger circuit is connected to the trigger coil of the xenon lamp tube. The ignition trigger circuit is used to trigger the xenon lamp tube to conduct when it receives the fifth control signal output by the main control circuit.

[0034] The lamp switch circuit has a first terminal connected to the second power supply terminal of the xenon lamp tube, a second terminal grounded, and a controlled terminal connected to the main control circuit. The lamp switch circuit is used to control the opening / closing of the xenon lamp tube according to the sixth control signal output by the main control circuit.

[0035] This invention also proposes a device comprising the pulsed light source driving circuit described above.

[0036] This utility model employs a pulsed light source driving circuit, including a power supply input terminal, a light source circuit, N charging and discharging circuits, and a main control circuit. The input terminals of each of the N charging and discharging circuits are connected to the power supply input terminal, and the output terminals of each of the N charging and discharging circuits are connected to the input terminal of the light source circuit. The N signal input terminals of the main control circuit are respectively connected to the detection terminals of the N charging and discharging circuits, and the N signal output terminals of the main control circuit are respectively connected to the controlled terminals of the N charging and discharging circuits. Thus, the main control circuit can detect the voltage of the N charging and discharging circuits and, based on the voltage of each circuit, control the charging and discharging state of each circuit to provide the necessary pulsed current for the operation of the light source circuit. Thus, by controlling the charging and discharging states of N charging and discharging circuits separately, this invention can achieve independent discharge of N charging and discharging circuits and continuous discharge of N charging and discharging circuits within one flash cycle. This can shorten the pulse interval, extend the pulse width, and increase the pulse energy density, thereby improving the hair removal effect and solving the problems of low energy density, pulse width-time mismatch, and poor hair removal effect caused by long pulse interval time in the existing single-capacitor technology. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0038] Figure 1 A schematic diagram of an embodiment of the pulse light source driving circuit provided by this utility model;

[0039] Figure 2A schematic diagram of another embodiment of the pulse light source driving circuit provided by this utility model;

[0040] Figure 3 Electronic circuit diagram of the power supply circuit and overvoltage detection circuit of an embodiment of the pulse light source driving circuit provided by this utility model;

[0041] Figure 4 An electronic circuit diagram of the charging and discharging circuit of an embodiment of the pulse light source driving circuit provided by this utility model;

[0042] Figure 5 An electronic circuit diagram of a pulse light source driving circuit according to an embodiment of the present invention.

[0043] Explanation of icon numbers:

[0044] label name label name 10 Light source circuit 20 N charging and discharging circuits 30 Main control circuit 40 Power supply circuit 50 Overvoltage detection circuit 11 Xenon lamp tube 12 Ignition trigger circuit 13 Lamp switch circuit 21 Voltage detection circuit 22 Discharge switch circuit 23 Charging switch circuit 24 Discharge circuit 41 DC-DC circuit 42 Power factor correction circuit

[0045] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0047] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0048] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0049] Before introducing the technical solutions involved in this utility model, some of the terms contained in this utility model will be introduced first.

[0050] Energy density (fluence, F): represents the amount of energy per unit area, usually expressed in joules per square centimeter (J / cm2).

[0051] Power: Represents the amount of energy released within a certain period of time, usually measured in watts (W).

[0052] Thermal relaxation time (TRT) is the time required for the temperature of a target to drop to half of its original temperature.

[0053] Wavelength: Wavelength affects the selective absorption of light by the target and also affects the depth of penetration into tissue.

[0054] Footprint size: This is crucial for light penetration into tissue. When light is emitted with a small footprint, only a small portion reaches the deep target area, while a larger footprint provides a larger surface area for light penetration, resulting in better penetration. A footprint of 7-10 nm is needed to penetrate to the middle dermis. The larger the footprint, the deeper the light penetrates the tissue.

[0055] Pulse duration: Light propagates in the form of pulsed or continuous waves. IPL devices use pulses, which can more selectively cause tissue damage. Pulse duration indicates the duration of beam irradiation. Laser and pulsed light systems can select the pulse width; the appropriate pulse width is affected by the thermal relaxation time of the target.

[0056] Pulse delay: When the cooling time between two pulses is shorter than the thermal relaxation time, heat primarily acts on the target. When the pulse delay is longer than the thermal relaxation time, heat is conducted to surrounding tissues. Therefore, the pulse delay is generally longer than the skin cooling time to avoid damage to surrounding tissues.

[0057] IPL pulsed light hair removal device: This is a device that uses Intense Pulsed Light (IPL) technology for hair removal. IPL is an abbreviation for Intense Pulsed Light. This technology emits light pulses of specific wavelengths that target the melanin in the hair follicles. When these light pulses are absorbed by the hair follicles, they are converted into heat energy, thereby destroying the hair follicles' ability to grow and achieving the effect of hair removal.

[0058] It's important to note that the thermal relaxation time of hair follicles is typically between 40 and 100 milliseconds (ms) (the thermal relaxation time of the epidermis is 3–10 ms; the diameter of a hair follicle is 200–300 μm, and the thermal relaxation time is 40–100 ms). Therefore, when selecting the pulse parameters of an IPL (Intense Pulsed Light) hair removal device, the pulse duration (pulse width) should be matched with the thermal relaxation time of the hair follicle to allow sufficient time for the surrounding skin tissue to cool and recover while the hair follicle is being destroyed by heat. For optimal hair removal results, the ideal pulse width should fall between the thermal relaxation time of the epidermis and the thermal relaxation time of the hair follicle. The pulse width should be between 2.5 and 60 ms. If the pulse width is too long, heat will diffuse into the surrounding tissue, increasing the risk of side effects. A certain energy density is required to effectively destroy the hair follicle and achieve hair removal. Generally, the energy density should be above 5 J / cm². Higher energy results in better hair removal, but excessively high energy densities may cause skin burns and other side effects. To achieve good hair removal results, the pulse interval time and pulse energy must be linked. If the pulse energy is low, the pulse interval time should be short, and if the pulse energy is high, the pulse interval time should be appropriately long.

[0059] Existing home-use hair removal devices typically use a single capacitor to power a xenon lamp. When the capacitor is fully charged, it discharges to power the xenon lamp, then the capacitor is recharged, and this cycle repeats to create continuous pulses. Current single-capacitor handheld hair removal devices suffer from drawbacks such as low energy density, pulse width-time mismatch, and long pulse intervals. The energy of a single pulse is typically 3-5 J / cm², while the energy density of professional hair removal devices ranges from 10-50 J / cm². 2 Its energy density is low. Its pulse width is 10-15ms (determined by the discharge time of a single capacitor), which is outside the ideal pulse width time range for hair removal and does not match the pulse width time required for ideal hair removal. Because it requires the capacitor to be fully charged before the next pulse can be formed, its pulse interval is more than 1 second. As a result, its long pulse interval time leads to poor hair removal effect of existing hair removal devices.

[0060] This invention proposes a pulsed light source driving circuit.

[0061] Please see Figure 1 In one embodiment of this utility model, the pulse light source driving circuit includes:

[0062] Power supply input terminal;

[0063] Light source circuit 10 is used to convert pulse current into pulse light source output;

[0064] There are N charging and discharging circuits 20, the input terminals of which are all connected to the power supply input terminal, and the output terminals of which are all connected to the input terminal of the light source circuit 10; N is a positive integer greater than or equal to 2.

[0065] The main control circuit 30 has N signal input terminals connected to the detection terminals of N charging and discharging circuits 20, and N signal output terminals connected to the controlled terminals of N charging and discharging circuits 20.

[0066] The main control circuit 30 is used to detect the voltage of the N charging and discharging circuits 20, and control the charging / discharging of the N charging and discharging circuits 20 respectively according to the voltage of the N charging and discharging circuits 20, so as to provide the required pulse current for the operation of the light source circuit 10.

[0067] In this embodiment, the light source circuit 10 may include a xenon lamp 11 and an ignition trigger circuit 12. The ignition trigger circuit 12 is connected to the trigger coil of the xenon lamp 11 to illuminate the xenon lamp 11. After receiving sufficient energy, the xenon lamp 11 emits a high-intensity light source pulse for hair removal. The charging and discharging circuit may include a charging switch circuit 23, an energy storage capacitor, and a discharging switch circuit 22. The charging switch circuit 23 controls the charging of the energy storage capacitor, and the discharging switch circuit 22 controls the discharging of the energy storage capacitor. The charging and discharging circuit can control the energy storage capacitor to discharge according to the control signal output by the main control circuit 30, and output a corresponding pulse current. The charging switch circuit 23 and the discharging switch circuit 22 may use fast-switching electronic components such as transistors (e.g., MOSFETs). The main control circuit 30 may be implemented using an integrated logic processing unit such as a microcontroller, combined with input / output interface circuits.

[0068] In this embodiment, the main control circuit 30 can detect the voltage of N charging and discharging circuits 20, and control the charging and discharging states of the N charging and discharging circuits 20 respectively according to the voltage of the N charging and discharging circuits 20. For example, it can control some charging and discharging circuits to charge / discharge, while others charge / discharge, or control multiple charging and discharging circuits to charge and discharge alternately. Through various control combinations of the N charging and discharging circuits 20, the working mode of the pulse light source driving circuit can be optimized based on the voltage detection results of the N charging and discharging circuits 20. This can significantly improve the energy density, pulse width-time matching degree, and shorten the pulse interval of the home hair removal device, thereby improving the hair removal effect.

[0069] Specifically, each charging and discharging circuit can operate independently. When one charging and discharging circuit is providing a pulse current to the light source circuit 10 (i.e., in a discharging state), other charging and discharging circuits can determine whether they need to charge or prepare to discharge based on their respective voltage levels. Thus, after one charging and discharging circuit completes its discharge, it can immediately take over from another fully charged circuit to provide the next pulse current without waiting for it to fully recharge. This significantly shortens the interval between pulses, helping to increase energy density and improve hair removal effectiveness.

[0070] Within a single flash cycle, the main control circuit 30 precisely controls N charging and discharging circuits 20 to sequentially discharge, providing pulsed current to the light source circuit 10. This allows for multiple pulsed currents to be included in a single flash. This not only extends the total pulse width within the flash cycle but also increases the total energy output per flash cycle. The main control circuit 30 can control the pulses based on the voltage of each charging and discharging circuit to ensure that each pulse reaches the ideal energy density. This makes the pulse sequence more consistent with the conditions required for ideal hair removal, meaning the pulse width can match the pulse width required for ideal hair removal, thus improving the hair removal effect.

[0071] When a portion of the charging and discharging circuits is discharging and supplying power to the light source circuit 10, the main control circuit 30 can simultaneously monitor the voltage level of the remaining charging and discharging circuits and cause them to enter the charging state; conversely, the same applies when the remaining circuits are discharging. In this way, even during continuous use, it can be ensured that there are always enough charging and discharging circuits ready to power the next pulse, avoiding the problem of existing single-capacitor pulse drives having to wait for the capacitor to be fully charged before discharging again. Therefore, compared to existing single-capacitor technology, this shortens the pulse interval and improves the hair removal effect.

[0072] In this invention, the input terminals of all N charging / discharging circuits 20 are connected to the power supply input terminal, and the output terminals of all N charging / discharging circuits 20 are connected to the input terminal of the light source circuit 10. The N signal input terminals of the main control circuit 30 are respectively connected to the detection terminals of the N charging / discharging circuits 20, and the N signal output terminals of the main control circuit 30 are respectively connected to the controlled terminals of the N charging / discharging circuits 20. Thus, the main control circuit 30 can detect the voltage of the N charging / discharging circuits 20 and, based on the voltage of the N charging / discharging circuits 20, control the charging / discharging state of each of the N charging / discharging circuits 20 to provide the required pulse current for the operation of the light source circuit 10. Thus, by controlling the charging and discharging states of N charging and discharging circuits 20 separately, this invention can achieve independent discharge of N charging and discharging circuits 20 and continuous discharge of N charging and discharging circuits 20 within one flash cycle. This can shorten the pulse interval, extend the pulse width, and increase the pulse energy density, thereby improving the hair removal effect and solving the problems of low energy density, pulse width-time mismatch, and poor hair removal effect caused by long pulse interval time in the existing single-capacitor technology.

[0073] Please see Figure 2 In one embodiment of this utility model, the pulse light source driving circuit includes two charging and discharging circuits;

[0074] The input terminal of the first charging and discharging circuit is connected to the power supply input terminal, the output terminal of the first charging and discharging circuit is connected to the input terminal of the light source circuit 10, the detection terminal of the first charging and discharging circuit is connected to the first signal input terminal of the main control circuit 30, and the controlled terminal of the first charging and discharging circuit is connected to the first signal output terminal of the main control circuit 30.

[0075] The input terminal of the second charging and discharging circuit is connected to the power supply input terminal, the output terminal of the second charging and discharging circuit is connected to the input terminal of the light source circuit 10, the detection terminal of the second charging and discharging circuit is connected to the second signal input terminal of the main control circuit 30, and the controlled terminal of the second charging and discharging circuit is connected to the second signal output terminal of the main control circuit 30.

[0076] The main control circuit 30 is used to control the charging / discharging of the first charging / discharging circuit and the second charging / discharging circuit according to the voltage of the first charging / discharging circuit and the voltage of the second charging / discharging circuit.

[0077] In one embodiment, the main control circuit 30 can control the first charging / discharging circuit and the second charging / discharging circuit to charge and discharge independently. Charging is controlled when the voltage of the corresponding charging / discharging circuit is lower than a first preset threshold, and discharging is controlled when the voltage of the corresponding charging / discharging circuit is higher than a second preset threshold. Thus, the first and second charging / discharging circuits can alternately charge when the voltage is below the first preset threshold and alternately discharge after reaching the second preset threshold. This allows for alternating supply of pulse current to the light source circuit 10, shortening the pulse interval, which helps to increase energy density and improve the hair removal effect.

[0078] In another embodiment, the main control circuit 30 can control the corresponding charging and discharging circuit to discharge when the voltage of the first charging and discharging circuit reaches a third preset threshold or the voltage of the second charging and discharging circuit reaches a fourth preset threshold, so that the first charging and discharging circuit and the second charging and discharging circuit can discharge sequentially to provide pulse current to the light source circuit 10. In this way, two pulse currents can be formed in one flash cycle, which can extend the pulse width and energy of one flash cycle and improve the hair removal effect.

[0079] Please see Figure 2 In one embodiment of this utility model, the charging and discharging circuit includes:

[0080] Energy storage capacitor;

[0081] Voltage detection circuit 21, the detection terminal of voltage detection circuit 21 is connected to energy storage capacitor, and the signal output terminal of voltage detection circuit 21 is connected to main control circuit 30. Voltage detection circuit 21 is used to detect the voltage value of energy storage capacitor and output corresponding voltage detection signal.

[0082] The discharge switch circuit 22 has its first terminal connected to the energy storage capacitor, its second terminal connected to the input terminal of the light source circuit 10, and its controlled terminal connected to the main control circuit 30. The discharge switch circuit 22 is used to control the discharge / stop discharge of the energy storage capacitor in order to provide pulse current to the light source circuit 10.

[0083] The main control circuit 30 is used to determine the voltage of the corresponding energy storage capacitor based on the voltage detection signal, and to control the operation of the discharge switch circuit 22 based on the comparison result between the voltage of the energy storage capacitor and the preset voltage.

[0084] In one embodiment, the charging and discharging circuit further includes:

[0085] The charging switch circuit 23 has its first terminal connected to the power supply input terminal, its second terminal connected to the energy storage capacitor, and its controlled terminal connected to the main control circuit 30. The charging switch circuit 23 is used to control the energy storage capacitor to charge / stop charging according to the first control signal output by the main control circuit 30.

[0086] In yet another embodiment, the charging and discharging circuit further includes:

[0087] The discharge circuit 24 has its first terminal connected to the energy storage capacitor, its second terminal grounded, and its controlled terminal connected to the main control circuit 30. The discharge circuit 24 is used to release / stop releasing the charge of the energy storage capacitor according to the second control signal from the main control circuit 30.

[0088] In this embodiment, the pulsed light source driving circuit includes two charging and discharging circuits as an example. Please refer to [link / reference]. Figure 2The first charging and discharging circuit includes a first energy storage capacitor, a first voltage detection circuit 21, a first discharge switch circuit 22, a first charging switch circuit 23, and a first discharge circuit 24. The first energy storage capacitor is connected to the light source circuit 10 via the first discharge switch circuit 22. The first voltage detection circuit 21 is connected to the first energy storage capacitor and is used to detect the voltage of the first energy storage capacitor. The first voltage detection circuit 21 and the first discharge switch circuit 22 are connected to the main control circuit 30. The first voltage detection circuit 21 outputs the voltage value of the first energy storage capacitor to the main control circuit 30. When the voltage value of the first energy storage capacitor reaches a first preset voltage, the main control circuit 30 controls the first discharge switch circuit 22 to open, and the first energy storage capacitor supplies power to the light source circuit 10. The power supply input terminal is connected to the first energy storage capacitor via the first charging switch circuit 23. The main control circuit 30 is connected to the first charging switch circuit 23 and controls the opening and closing of the first charging switch circuit 23. When the first charging switch circuit 23 is open, the power supply input terminal charges the first energy storage capacitor. The first discharge circuit 24 is connected to the first energy storage capacitor and ground. The main control circuit 30 is connected to the first discharge circuit 24. The main control circuit 30 controls the opening and closing of the connection between the first discharge circuit 24, the first energy storage capacitor and ground. When the hair removal device is turned off, the main control circuit 30 controls the first discharge circuit 24 to open, releasing the charge on the first energy storage capacitor to ground, preventing maintenance personnel from being shocked when disassembling the device.

[0089] The second charging and discharging circuit includes a second energy storage capacitor, a second voltage detection circuit 21, a second discharge switch circuit 22, a second charging switch circuit 23, and a second discharge circuit 24. The second energy storage capacitor is connected to the light source circuit 10 via the second discharge switch circuit 22. The second voltage detection circuit 21 is connected to the second energy storage capacitor and is used to detect its voltage. The second voltage detection circuit 21 and the second discharge switch circuit 22 are connected to the main control circuit 30. The second voltage detection circuit 21 outputs the voltage value of the second energy storage capacitor to the main control circuit 30. When the voltage value of the second energy storage capacitor reaches a second preset voltage, the main control circuit 30 controls the second discharge switch circuit 22 to open, and the second energy storage capacitor supplies power to the light source circuit 10. The power supply input terminal is connected to the second energy storage capacitor via the second charging switch circuit 23. The main control circuit 30 is connected to the second charging switch circuit 23 and controls its opening and closing. When the second charging switch circuit 23 is open, the power supply input terminal charges the second energy storage capacitor. The second discharge circuit 24 is connected to the second energy storage capacitor and ground. The main control circuit 30 is connected to the second discharge circuit 24. The main control circuit 30 controls the opening and closing of the connection between the second discharge circuit 24, the second energy storage capacitor and ground. When the hair removal device is turned off, the main control circuit 30 controls the second discharge circuit 24 to prevent maintenance personnel from being shocked when disassembling the device.

[0090] Please see Figure 4In one embodiment of this utility model, the discharge switch circuit 22 includes a driver chip U3 and a power transistor Q403; the signal input terminal of the driver chip U3 is connected to the signal output terminal of the main control circuit 30, the signal output terminal of the driver chip U3 is connected to the controlled terminal of the power transistor Q403, the first terminal of the power transistor Q403 is connected to the energy storage capacitor CE, and the second terminal of the power transistor Q403 is connected to the input terminal of the light source circuit 10.

[0091] The driver chip U3 is used to drive the power transistor Q403 to turn on / off according to the third control signal output by the main control circuit 30.

[0092] It should be noted that the driver chip U3 can be a GG100 driver chip, and the power transistor Q403 can be a power MOSFET. In this embodiment, the discharge switch circuit 22 can be based on the GG100 driver chip, and components such as resistors, capacitors, diodes, Zener diodes, and MOSFETs can be adaptively set. For example, resistors R418 to R426, capacitors C409 to C413, diodes D409 to D410, Zener diodes DW403 to DW404, and switching transistor Q404 can be set to improve the stability of the circuit and realize the safe and reliable driving of the power MOSFET by the GG100 driver chip. In this embodiment, when the HV-PASS signal output by the main control circuit 30 is high, the corresponding MOSFET power transistor Q403 is turned on, and the corresponding energy storage capacitor CE is discharged; when the HV-PASS signal output by the main control circuit 30 is low, the corresponding MOSFET power transistor Q403 is turned off, and the corresponding energy storage capacitor CE stops discharging.

[0093] In one feasible embodiment, the charging switch circuit 23 may also include a driver chip U2 and a power transistor Q401. The driver chip U2 may be a GG100 driver chip, and the power transistor Q401 may be a power MOSFET. The two terminals of the power transistor Q401 are respectively connected to the power supply input terminal and the energy storage capacitor CE.

[0094] In this embodiment, please refer to Figure 4The charging switch circuit 23 can be based on the GG100 driver chip, and can adaptively set components such as resistors, capacitors, diodes, Zener diodes, and MOSFETs. For example, it can set resistors R401 to R409, capacitors C401 to C415, diodes D401 to D404, Zener diodes DW401 to DW402, and switching transistor Q402 to improve circuit stability and achieve safe and reliable driving of the power MOSFET Q401 by the GG100 driver chip. In this embodiment, when the HV_CHARGE signal output by the main control circuit 30 is high, the corresponding MOSFET Q401 is turned on, and the corresponding energy storage capacitor CE is charged; when the HV_CHARGE signal output by the main control circuit 30 is low, the corresponding MOSFET Q401 is turned off, and the corresponding energy storage capacitor CE stops charging.

[0095] Please see Figure 2 In one embodiment of this utility model, the pulse light source driving circuit further includes:

[0096] The power supply circuit 40 has a power input terminal for connecting to an external power input terminal, a power output terminal for connecting to a power supply input terminal, and an enable terminal for connecting to the main control circuit 30. The power supply circuit 40 is used to operate or stop operating according to the fourth control signal output by the main control circuit 30.

[0097] In this embodiment, please refer to Figure 2 The power supply circuit 40 may include a DC-DC circuit 41 and a power factor correction circuit 42. The DC-DC circuit 41 transforms the external power supply voltage before outputting it, while the power factor correction circuit 42 improves power utilization efficiency and reduces power transmission losses. (See also...) Figure 3The DC-DC circuit 41 may include a transformer T1 and a power MOSFET Q301. The power factor correction circuit 42 may include a PFC chip U1. The main control circuit 30 can also control the operation of the PFC chip U1, thereby controlling the conduction frequency of the power MOSFET Q301, and thus adjusting the voltage level of the charging voltage output by the transformer T1. Specifically, the transformer T1 can transform the external power supply voltage and output it. The PFC chip U1 can receive the HV_6562EN signal and control the conduction frequency of the power MOSFET Q301 according to the HV_6562EN signal to adjust the transformation operation of the transformer T1, so that the output voltage of the transformer T1 is adapted to the required voltage of the N charging and discharging circuits 20. For example, the main control circuit 30 compares the voltage indicated by the HV-DET signal with the preset level voltage and outputs the corresponding HV-6562-EN signal to the PFC chip U1 to adjust the level of the output charging voltage. Specifically, when the HV_6562EN signal is low, the PFC chip U1 controls the power MOSFET Q301 to conduct; when the HV_6562EN signal is high, the PFC chip U1 controls the power MOSFET Q301 to turn off. This controls the conduction frequency of the power MOSFET Q301, thus adjusting the output voltage level of the transformer T1. It can be understood that when the main control circuit 10 detects that the voltage of all energy storage capacitors does not exceed the preset overvoltage threshold, it can control the voltage level output by the power supply circuit 40 through the output HV-DET signal. When the main control circuit 10 detects that the voltage of any energy storage capacitor exceeds the preset overvoltage threshold, it can control the power supply circuit 40 to stop working through the output HV-6562-EN signal.

[0098] In this embodiment, the power supply circuit 40 can be based on the transformer T1, the power MOSFET Q301, and the PFC chip U1, and can be adapted to include components such as resistors, capacitors, and diodes. For example, resistors R301 to R316, capacitors C301 to C308, and diodes D301 to D302 can be added to improve the stability of the circuit. This enables the PFC chip U1 to control the transformer T1's voltage transformation through the power MOSFET Q301 safely and reliably, thus improving the stability of the circuit.

[0099] In one feasible embodiment, the pulsed light source driving circuit further includes:

[0100] The overvoltage detection circuit 50 has its first terminal connected to the enable terminal of the power supply circuit 40, its N second terminals connected to the detection terminals of the N charging and discharging circuits 20 respectively, and its controlled terminal connected to the main control circuit 30. The overvoltage detection circuit 50 is used to detect the voltage of any one of the N charging and discharging circuits 20.

[0101] The power supply circuit 40 is also used to start / stop operation based on the detection result of the overvoltage detection circuit 50.

[0102] In this embodiment, please refer to Figure 3 The overvoltage detection circuit 50 may include a relay RELAY, resistors R317 to R320, and diode D304 to detect overvoltage in the energy storage capacitor of the charging and discharging circuit. For example, when the OV_RELAY signal output by the main control circuit 30 is high, the detection terminal of the first energy storage capacitor is connected to the enable terminal of the power supply circuit 40, i.e., the INV terminal of the PFC chip U1. At this time, the overvoltage detection circuit 50 detects the voltage of the first energy storage capacitor. If the voltage of the first energy storage capacitor exceeds the preset overvoltage threshold, the PFC chip U1 receives this information and can control the power MOSFET Q301 to disconnect and the transformer T1 to stop working, so as to protect the first energy storage capacitor from overvoltage damage. When the OV_RELAY signal output by the main control circuit 30 is low, the detection terminal of the second energy storage capacitor is connected to the enable terminal of the power supply circuit 40, i.e., the INV terminal of the PFC chip U1. At this time, the overvoltage detection circuit 50 detects the voltage of the second energy storage capacitor. If the voltage of the second energy storage capacitor exceeds the preset overvoltage threshold, the PFC chip U1 receives this information and can control the power MOSFET Q301 to disconnect, and the transformer T1 to stop working, so as to protect the first energy storage capacitor from overvoltage damage. It can be understood that when the main control circuit 10 detects that the voltage of any energy storage capacitor exceeds the preset overvoltage threshold through the voltage detection circuit 21, it can also control the PFC chip U1 through the HV-DET signal, and then control the power MOSFET Q301 to disconnect, so as to protect the energy storage capacitor from overvoltage damage. Thus, this embodiment can achieve overvoltage detection and protection of the energy storage capacitor through two circuit structures, which provides high safety.

[0103] Please see Figure 2 In one embodiment of this utility model, the light source circuit 10 includes:

[0104] Xenon lamp tube 11, the first power supply terminal of xenon lamp tube 11 is connected to the output terminals of N charging and discharging circuits 20;

[0105] Ignition trigger circuit 12, the controlled end of ignition trigger circuit 12 is connected to main control circuit 30, and the output end of ignition trigger circuit 12 is connected to trigger coil of xenon lamp tube 11. Ignition trigger circuit 12 is used to trigger xenon lamp tube 11 to conduct when it receives the fifth control signal output by main control circuit 30.

[0106] The lamp switch circuit 13 has its first terminal connected to the second power supply terminal of the xenon lamp tube 11, its second terminal grounded, and its controlled terminal connected to the main control circuit 30. The lamp switch circuit 13 is used to control the opening / closing of the xenon lamp tube 11 according to the sixth control signal output by the main control circuit 30.

[0107] In this embodiment, please refer to Figure 5 The xenon lamp tube 11 may include a positive electrode, a negative electrode, and a trigger coil. The xenon lamp tube 11 is connected to interface J. The positive electrode of the xenon lamp tube 11 is connected to the output terminals of N charging and discharging circuits 20. The negative electrode of the xenon lamp tube 11 is connected to the lamp tube switching circuit 13. The trigger coil of the xenon lamp tube 11 is connected to the ignition trigger circuit 12. The ignition trigger circuit 12 may include Zener diodes DW501-DW502, resistors R507-R509, diode D502, capacitor C502, and silicon controlled rectifier Q502. The lamp tube switching circuit 13 may include a driver chip U4, resistors R502-R506, capacitors C502-C503, diode D501, and switching transistor Q501. In this embodiment, the main control circuit 30 first outputs an HV_IGBT_EN signal to the ignition trigger circuit 12. The ignition trigger circuit 12 generates a high-voltage pulse applied to the trigger coil of the xenon lamp tube 11, ionizing the gas inside the xenon lamp tube 11 and creating an initial conductive path. When ignition is successfully triggered, the main control circuit 30 outputs an HV_SCR_EN signal to close the switch transistor Q501. At this time, the pulse current flows through the xenon lamp tube 11 and generates light source output. In this way, high voltage and large current can be directly applied without ionization, preventing damage to the xenon lamp tube 11 or other circuit components.

[0108] This utility model also proposes a device that includes the pulse light source driving circuit described above. The device can be a beauty device. The specific structure of the pulse light source driving circuit is as described in the above embodiments. Since this device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0109] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A pulsed light source driving circuit, characterized by, The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device.

2. The pulsed optical source driving circuit of claim 1, wherein, The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device.

3. The pulsed optical source driving circuit of claim 1, wherein, The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device.

4. The pulsed optical source driving circuit of claim 3, wherein, The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. The application relates to a pulse current and pulse light source conversion device. 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The pulsed optical source driving circuit of claim 3, wherein, The charge-discharge circuit further comprises: a discharge circuit, a first end of the discharge circuit being connected with the energy storage capacitor, a second end of the discharge circuit being grounded, a controlled end of the discharge circuit being connected with the master control circuit; the discharge circuit is used for releasing / stopping releasing the charge of the energy storage capacitor according to the second control signal of the master control circuit.

6. The pulsed optical source driving circuit of claim 3, wherein, The discharge switch circuit comprises a drive chip and a power tube; a signal input end of the drive chip is connected with a signal output end of the master control circuit, a signal output end of the drive chip is connected with a controlled end of the power tube, a first end of the power tube is connected with the energy storage capacitor, and a second end of the power tube is connected with an input end of the light source circuit; The drive chip is used for driving the power tube to turn on / shut off according to the third control signal output by the master control circuit.

7. The pulsed optical source driving circuit of claim 1, wherein, The pulse light source driving circuit further comprises: a power supply circuit, a power input end of the power supply circuit being used for being connected with an external power input end, a power output end of the power supply circuit being connected with the power supply input end, and an enable end of the power supply circuit being connected with the master control circuit; the power supply circuit is used for working or stopping working according to the fourth control signal output by the master control circuit.

8. The pulsed optical source driving circuit of claim 7, wherein, The pulse light source driving circuit further comprises: an overvoltage detection circuit, a first end of the overvoltage detection circuit being connected with the enable end of the power supply circuit, N second ends of the overvoltage detection circuit being respectively connected with N detection ends of the charge-discharge circuits, and a controlled end of the overvoltage detection circuit being connected with the master control circuit; the overvoltage detection circuit is used for detecting the voltage of any one of the charge-discharge circuits; The power supply circuit is further used for working / stopping working according to the detection result of the overvoltage detection circuit.

9. The pulsed optical source driving circuit of claim 1, wherein, The light source circuit comprises: a xenon lamp tube, a first power end of the xenon lamp tube being connected with the output ends of the N charge-discharge circuits; an ignition trigger circuit, a controlled end of the ignition trigger circuit being connected with the master control circuit, an output end of the ignition trigger circuit being connected with a trigger coil of the xenon lamp tube, and the ignition trigger circuit being used for triggering the xenon lamp tube to turn on when receiving the fifth control signal output by the master control circuit; a lamp tube switch circuit, a first end of the lamp tube switch circuit being connected with a second power end of the xenon lamp tube, a second end of the lamp tube switch circuit being grounded, and a controlled end of the lamp tube switch circuit being connected with the master control circuit; the lamp tube switch circuit is used for controlling the xenon lamp tube to close / open according to the sixth control signal output by the master control circuit.

10. An apparatus, comprising: The pulse light source driving circuit comprises any one of claims 1 to 9. The pulse light source driving circuit comprises any one of claims 1 to 9.

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