Flash control method of intense pulsed light and intense light hair removal instrument

Abstract

The present application relates to the field of depilatory apparatus, in particular to a flash control method of intense pulsed light and an intense light depilatory apparatus. The steps of the flash control method include: after the controller triggers the flash mode, outputting a PWM signal to a driving switch module to control the opening and closing of the pulse light emitting tube and / or the flash, and controlling the flash frequency of the pulse light emitting tube by regulating the pulse width of the PWM signal to control the opening and closing of the pulse light emitting tube and / or the flash, and controlling the flash frequency of the pulse light emitting tube by regulating the pulse width of the PWM signal. The beneficial effects of the present application are that, compared with the prior art, the PWM signal output by the controller of the present application controls the on-off of the driving switch module, synchronously cooperates with the high-voltage trigger pulse output by the driving module, realizes the opening and closing of the pulse light emitting tube and the regulation of the flash frequency, and guarantees the stability and accuracy of the pulse light output.

Description

Technical Field

[0001] This invention relates to the field of hair removal devices, specifically to a flash control method for intense pulsed light and an intense pulsed light hair removal device. Background Technology

[0002] Intense pulsed light (IPL) hair removal devices have become mainstream consumer beauty instruments due to their non-invasive and highly effective hair removal advantages. Their core working principle involves a drive circuit controlling a pulsed light tube to release intense pulsed light of specific energy, which acts on the hair follicles to achieve hair removal. The precision of the pulsed light tube's flash control directly determines the device's effectiveness, safety, and reliability. However, current technologies for IPL hair removal devices, including flash control methods and associated intense pulsed light drive circuits, still have many technical shortcomings, failing to meet users' demands for high-frequency continuous flashes, stable light power, adjustable levels, and safe operation. Specific problems include the following: The flash control precision is insufficient, and the multi-flash effect is poor. The number of flashes of the pulse light tube in the existing hair removal device is limited, and most can only achieve single flash, double flash or triple flash, which cannot meet the diverse needs of different hair removal areas and different hair densities for the number of flashes.

[0003] The light power has poor stability and is greatly affected by voltage fluctuations. The high-voltage power supply circuit of the intense pulsed light hair removal device is easily affected by the grid voltage and the energy storage status of the circuit, resulting in voltage fluctuations.

[0004] The activation control has low safety and is prone to accidental flash activation. Most existing hair removal devices use a single trigger module for flash activation, which can be triggered by a physical button or touch button without a double safety trigger mechanism. During use, accidental activation of the pulse light tube is easy due to accidental touch or bumps. The strong pulse light is directly emitted, which can cause eye and skin damage to the user or people in the vicinity, posing a serious safety hazard. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a solution to the above-mentioned defects of the prior art, such as the difficulty of high-frequency continuous flashing, unstable light power, and lack of multi-level adjustment in hair removal devices.

[0006] The technical solution adopted by the present invention to solve its technical problem is: to provide a flash control method for strong pulsed light, applied to a strong light pulse driving circuit, wherein the strong light pulse driving circuit includes a controller, a driving module, a driving switch module and a pulsed light-emitting diode, the output terminal of the controller is connected to the control terminal of the driving switch module, one on / off terminal of the driving switch module is connected to the negative terminal of the pulsed light-emitting diode and the driving module respectively, the other on / off terminal of the driving switch module is grounded, the positive terminal of the pulsed light-emitting diode is connected to the bus, and the trigger terminal of the pulsed light-emitting diode is connected to the driving module; The flash control method includes the following steps: after the controller triggers the flash mode, it outputs a PWM signal to the drive switch module to control the on / off state and / or flashing of the pulse LED, and controls the flashing frequency of the pulse LED by adjusting the pulse width of the PWM signal.

[0007] In a preferred embodiment, the high-intensity pulse driving circuit includes at least two trigger modules, both of which are connected to the controller. The flash control method includes the following steps: if both trigger modules output valid control signals to the controller after being triggered, the controller detects and determines that the two valid control signals are valid, and then starts to output PWM signals to enter the flash mode.

[0008] A preferred embodiment is that the two triggering modules are a button triggering module and a touch key triggering module, respectively.

[0009] In a preferred embodiment, the high-intensity pulse driving circuit further includes a start button module connected to the controller, and the steps of the flash control method include: triggering the start button module after power-on, the controller starting to work, detecting and monitoring the working status of the two trigger modules, and entering standby mode.

[0010] In a preferred embodiment, the controller is configured with at least two different flash power levels, each flash power level corresponding to a different target constant light power of the pulse LED. The state of the PWM signal output by the controller is determined by the currently selected flash power level. The target constant light power satisfies the formula J=N×P×T, where N is the flash power level, P is the electrical power, and T is the PWM signal pulse width.

[0011] In a preferred embodiment, the flash control method includes the following steps: the controller receives a power level selection signal, and determines and locks the current flash power level based on the power level selection signal; The controller pre-stores the corresponding PWM pulse width parameters for each of the flash power levels, and when outputting the PWM signal, it calls the PWM pulse width parameters of the corresponding level to perform drive control.

[0012] In a preferred embodiment, the high-intensity light pulse driving circuit further includes a voltage detection module connected to the controller. The voltage detection module is connected to the bus and is used to detect the voltage V output to the pulse LED in real time and transmit the detection signal to the controller. The controller calculates the power P based on the detected voltage V, where P = V × I = V² / R, and R is the circuit internal resistance. The steps of the flash control method include: When the voltage V remains constant, the state of the PWM signal is determined by the flash power level to maintain a constant optical power J at the corresponding flash power level. When the voltage V fluctuates, if the voltage V increases and the electrical power P increases, the controller decreases the PWM pulse width T. If the voltage V decreases and the electrical power P decreases, the controller increases the PWM pulse width T.

[0013] A preferred embodiment is that the flash control method includes the following steps: when the controller enters standby mode, if no valid control signal from any trigger module is detected for a preset time, the controller controls the strong light pulse drive circuit to shut down and enter a sleep state; the controller is then awakened and returns to standby mode by re-triggering the start button module.

[0014] A preferred embodiment is that the controller pre-stores multiple flash count parameters and a fixed value for the single PWM pulse width corresponding to each flash count level. The fixed value for the single PWM pulse width remains unchanged within a single multi-flash cycle after being selected. The steps of the flash control method include: When both trigger modules output valid control signals simultaneously, the controller reads the selected flash count level and the corresponding fixed PWM pulse width value. The controller cyclically outputs PWM signals of the same pulse width to the drive switch module at preset intervals to trigger the pulse LED to flash; during the flashing process, the controller locks the PWM pulse width parameter.

[0015] The technical solution adopted by the present invention to solve its technical problem is: to provide an intense light hair removal device, the intense light hair removal device including a main control circuit board and a pulse light-emitting tube, the main control circuit board having a built-in intense light pulse driving circuit to control the pulse light-emitting tube to execute the flash control method.

[0016] The beneficial effect of the present invention is that, compared with the prior art, the PWM signal output by the controller of the present invention controls the on and off of the drive switch module, and synchronously cooperates with the high voltage trigger pulse output by the drive module to realize the on and off of the pulse light tube and the adjustment of the flash frequency, thus ensuring the stability and accuracy of the pulse light output. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the high-intensity light pulse driving circuit of the present invention; Figure 2 This is a schematic diagram of the flash control method for intense pulsed light of the present invention; Figure 3 This is a schematic diagram of the flash control method for entering flash mode according to the present invention; Figure 4This is a schematic diagram of the triggering module of the present invention; Figure 5 This is a schematic diagram of the flash control method for entering standby mode according to the present invention; Figure 6 This is a schematic diagram of the start button module of the present invention; Figure 7 This is a schematic diagram of the gear selection module of the present invention; Figure 8 This is a schematic diagram of the control method of the present invention based on different flash power levels; Figure 9 This is a schematic diagram of the voltage detection-based control method of the present invention; Figure 10 This is a schematic diagram of the control method based on the sleep state of the present invention; Figure 11 This is a schematic diagram of the control method based on the flash count parameter of the present invention; Figure 12 This is a circuit diagram of the high-intensity light pulse driving circuit of the present invention; Figure 13 This is the circuit diagram of the controller of the present invention. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] like Figure 1 and Figure 2 As shown, the present invention provides a preferred embodiment of a flash control method for intense pulsed light.

[0020] A flash control method for intense pulsed light is applied to an intense pulsed light driving circuit. The intense pulsed light driving circuit includes a controller 100, a driving module 200, a driving switch module 300, and a pulsed LED 400. The output terminal of the controller 100 is connected to the control terminal of the driving switch module 300. One on / off terminal of the driving switch module 300 is connected to the negative terminal of the pulsed LED 400 and the driving module 200, respectively. The other on / off terminal of the driving switch module 300 is grounded. The positive terminal of the pulsed LED 400 is connected to a busbar. The trigger electrode of the pulse LED 400 is connected to the driving module 200; the steps of the flash control method include: step S31, after the controller 100 triggers the flash mode, it outputs a PWM signal to the driving switch module 300 to control the on / off and / or flashing of the pulse LED 400; step S32, the flashing frequency of the pulse LED 400 is controlled by adjusting the pulse width of the PWM signal to control the on / off and / or flashing of the pulse LED 400, and the flashing frequency of the pulse LED 400 is controlled by adjusting the pulse width of the PWM signal.

[0021] Specifically, the output terminal of the controller 100 is electrically connected to the control terminal of the drive switch module 300, and is used to output a PWM signal to control the conduction and cutoff of the drive switch module 300. The drive switch module 300 is preferably a MOSFET. The output terminal of the controller 100 is electrically connected to the gate of the MOSFET. The controller 100 controls the conduction and cutoff of the MOSFET by outputting a PWM signal to the gate of the MOSFET. The drain of the MOSFET is connected to the negative terminals of the drive module 200 and the pulse LED 400, forming a current transmission path. The source of the MOSFET is directly grounded, providing a current return path for the circuit. The positive terminal of the pulse LED 400 is connected to the bus to obtain the high-voltage power supply required for pulsed illumination. The trigger terminal of the pulse LED 400 is matched and connected to the drive module 200, which provides a trigger signal to cooperate with the on / off action of the MOSFET to achieve pulsed illumination. The positive terminal of the pulse LED 400 is connected to the bus, which can provide a stable high-voltage operating power supply for the pulse LED 400. The trigger electrode of the pulse LED 400 is connected to the drive module 200. The drive module 200 has a built-in pulse transformer, which is also connected to the bus. This pulse transformer can convert the low-voltage signal output by the controller 100 into a high-voltage trigger pulse, driving the pulse LED 400 to quickly ignite. During operation, the PWM signal output by the controller 100 controls the on / off state of the drive switch module 300, synchronously coordinating with the high-voltage trigger pulse output by the drive module 200 to realize the on / off state of the pulse LED 400 and adjust the flash frequency, ensuring the stability and accuracy of the pulse light output.

[0022] The busbar provides high-voltage power to the primary winding of the pulse transformer. At the same time, the low-voltage control signal output by the controller 100 regulates the current flow of the primary winding. Utilizing the principle of electromagnetic induction, the high-voltage pulse current of the primary winding will induce an instantaneous high-voltage trigger pulse in the secondary winding. The high-voltage pulse acts on the trigger electrode of the pulse LED 400, which can instantly break down the gas inside the pulse LED 400, causing it to quickly ignite and release strong pulse light.

[0023] In this embodiment, after receiving an external trigger command, the controller 100 enters a preset flashing mode. Before triggering, it has completed the detection of the bus voltage and the self-test of its own working status to ensure that the flashing start conditions are met. The controller 100 generates a PWM signal with a corresponding pulse width according to the preset parameters of the flashing mode and outputs it to the control terminal of the drive switch module 300. For example, when the PWM signal is high, the gate of the MOSFET receives a driving voltage, the drain and source are connected, and the negative terminal of the pulse LED 400 forms a path with ground; when the PWM signal is low, the gate of the MOSFET loses the driving voltage, the drain and source are turned off, and the negative terminal circuit of the pulse LED 400 is disconnected.

[0024] Furthermore, the controller 100 adjusts the output frequency of the PWM signal to change the conduction interval of the drive switching module 300, thereby precisely controlling the flashing frequency of the pulse LED 400. For example, when high-frequency flashing is required, the controller 100 increases the PWM signal frequency and shortens the turn-off interval of the MOSFET; when low-frequency flashing is required, the controller 100 decreases the PWM signal frequency and extends the turn-off interval of the MOSFET.

[0025] Through the circuit connection and control steps described above, the PWM signal output by the controller 100 controls the on / off state of the drive switch module 300, and synchronously coordinates with the high-voltage trigger pulse output by the drive module 200 to realize the on / off state of the pulse LED 400 and the adjustment of the flashing frequency, ensuring the stability and accuracy of the pulse light output.

[0026] In this embodiment, an intense light hair removal device is also provided. The device includes a main control circuit board and a pulsed light-emitting diode (PLD) 400. The main control circuit board has a built-in intense light pulse driving circuit to control the PLD 400 to execute the flash control method. The device also includes a housing. The main control circuit board and the PLD 400 are integrated and installed in a preset position within the housing. The light-emitting end of the PLD 400 corresponds to the light outlet of the housing, ensuring that the intense pulsed light emitted by the PLD 400 can accurately act on the area to be treated through the light outlet. The main control circuit board integrates all functional units of the intense light pulse driving circuit, including a controller 100, a drive module 200, a drive switch module 300, and a voltage detection module 600. These units are arranged on the main control circuit board according to their circuit connections, forming an integrated drive control circuit, effectively reducing the space occupied by the circuit.

[0027] like Figure 3 and Figure 4 As shown, the present invention provides a preferred embodiment of the trigger module 700.

[0028] The high-intensity pulse driving circuit includes at least two trigger modules 700, both of which are connected to the controller 100. The flash control method includes the following steps: Step S20: If both trigger modules 700 output valid control signals to the controller 100 after being triggered, the controller 100 detects and determines that the two valid control signals are valid, and then starts to output PWM signals to enter the flash mode.

[0029] Specifically, both trigger modules 700 are electrically connected to the signal input terminal of the controller 100 and independently transmit trigger signals to the controller 100, forming a double-protection triggering mechanism. After power-on and initialization, the controller 100 continuously scans the signal status of the two trigger modules 700. Only when both trigger modules 700 simultaneously output valid level signals does the controller 100 determine that the flashing start condition is met, thus entering flashing mode. If only a single trigger module 700 outputs a valid signal, or if there is a timing difference in the signal outputs of the two trigger modules 700, the controller 100 will remain in standby mode and will not output a PWM signal, thereby avoiding accidental activation of the pulse LED 400 due to accidental touch and improving the safety and reliability of the circuit operation.

[0030] In this embodiment, the two trigger modules 700 are a button trigger module 710 and a touch key trigger module 720. Specifically, the button trigger module 710 is a physical button structure; when the user presses the button, the module outputs a high-level valid signal to the controller 100. The touch key trigger module 720 is a capacitive touch structure; when the user touches the sensing area, the touch key trigger module 720 generates a high-level valid signal through the change in capacitance and transmits it to the controller 100. The controller 100 has a preset dual-signal detection logic. It needs to simultaneously receive the press valid signal from the button trigger module 710 and the touch valid signal from the touch key trigger module 720, and the duration of the valid state of both signals must reach a preset threshold before the PWM signal generation program is started, thereby driving the pulse LED 400 to enter the flashing mode.

[0031] like Figure 5 and Figure 6 As shown, the present invention provides a preferred embodiment of a start key module 800.

[0032] The high-intensity light pulse driving circuit also includes a start button module 800 connected to the controller 100. The steps of the flash control method include: step S10, triggering the start button module 800 after power-on, the controller 100 starts working, and detects and monitors the working status of the two trigger modules, and enters standby mode.

[0033] Specifically, the start button module 800 serves as the start-up trigger unit for the entire circuit system. Upon power-up, the controller 100 can first be self-started via the auxiliary power supply 500. The auxiliary power supply 500 outputs a 5V voltage, at which point the controller 100 is in a low-power, wait-to-wake state, performing no detection or control operations. When the user triggers the start button module 800, if the start button module 800 outputs a high-level valid trigger signal to the controller 100, the controller 100 receives this signal, switches from the wait-to-wake state to the working state, and immediately executes the initialization process: The controller 100 first performs a self-test on its own storage unit 110, IO interface, and AD sampling channel to ensure that all functional modules are functioning normally. The controller 100 reads the voltage value of the bus to determine whether the current power supply meets the operating requirements of the pulse LED 400. The controller 100 continuously scans the signal input terminals of the two trigger modules to confirm that both the button trigger module 710 and the touch button trigger module 720 are in their initial invalid state, avoiding false triggering due to module malfunction. After the initialization process is completed, the controller 100 enters a low-power standby mode. In this mode, the controller 100 maintains signal detection of the start button module 800 and the two trigger modules, but does not output PWM drive signals. Simultaneously, it outputs a standby status indication via indicator lights, awaiting the user's next operation command.

[0034] like Figure 7 and Figure 8 As shown, the present invention provides a preferred embodiment of a flash control method for intense pulsed light.

[0035] The controller 100 is configured with at least two different flash power levels. Different flash power levels correspond to different target constant light power of the pulse LED 400. The state of the PWM signal output by the controller 100 is determined by the currently selected flash power level. The target constant light power satisfies the formula J=N×P×T, where N is the level, P is the electrical power, and T is the PWM signal pulse width.

[0036] Specifically, the controller 100 has a built-in storage unit 110, which pre-stores multiple sets of flash power level parameters. Each set of flash power level parameters corresponds to a unique target constant optical power value. The level parameter N is a positive integer, and the level value is positively correlated with the target constant optical power; that is, the larger the value of level N, the higher the corresponding target constant optical power J. The electrical power P is calculated from the bus voltage V and the circuit internal resistance R, satisfying the formula P=V² / R. The controller 100 collects the bus voltage V in real time through the voltage detection module 600, and combines it with the preset circuit internal resistance R to accurately calculate the current electrical power P.

[0037] Based on the target constant optical power formula J=N×P×T, the controller 100 can deduce the required PWM signal pulse width T according to the selected gear N and the real-time calculated electrical power P, thereby ensuring the constant output optical power of the pulse LED 400 under different operating conditions.

[0038] In this embodiment, the flash control method includes the following steps: Step S40, the controller 100 receives a power level selection signal, determines and locks the current flash power level according to the power level selection signal; wherein, the controller 100 pre-stores the corresponding PWM pulse width parameter for each flash power level, and calls the PWM pulse width parameter of the corresponding level to perform drive control when outputting the PWM signal.

[0039] Specifically, the high-power pulse drive circuit is equipped with a power level selection module 900, which is electrically connected to the signal input terminal of the controller 100. Users can manually switch between different flash power levels and send corresponding power level selection signals to the controller 100. Upon receiving the power level selection signal, the controller 100 first verifies the signal's validity. If the verification is successful, it immediately determines and locks the current working power level and generates a power level lock command to prevent accidental power level shifts during flashing. The controller 100's storage unit 110 pre-stores corresponding PWM pulse width parameters for each flash power level. These PWM pulse width parameters are initial pulse width values ​​calculated by combining the target constant light power and preset voltage value for the corresponding power level. When the controller 100 determines that the flash start conditions are met, it directly calls the PWM pulse width parameters corresponding to the currently locked power level, generates a PWM drive signal, and outputs it to the drive switch module 300. This controls the pulse LED 400 to output a constant light power matching the current power level, ensuring the stability and consistency of the flash effect at different power levels.

[0040] The flash power selection module 900 can be implemented in two ways: First, it can use a multi-position button structure, where each button corresponds to a fixed flash power level. When the user presses the corresponding button, the module outputs a level signal matching that level to the controller 100. Second, it can use a single button to switch between different levels. Third, it can use a rotary knob structure with a built-in angle detection element. When the user rotates the knob to different angles, the angle detection element converts the mechanical angle change into an electrical signal, and the controller 100 interprets the different electrical signals to determine the corresponding flash power level.

[0041] like Figure 1 and Figure 9 As shown, the present invention provides a preferred embodiment of a voltage detection module 600.

[0042] The high-intensity pulse driving circuit also includes a voltage detection module 600 connected to the controller 100. The voltage detection module 600 is connected to the bus and is used to detect the voltage V output to the pulse LED 400 in real time and transmit the detection signal to the controller 100. The controller 100 calculates the power P based on the detected voltage V, where P = V × I = V² / R, and R is the circuit internal resistance. The steps of the flash control method include: Step S51, when the voltage V is constant, the state of the PWM signal is determined by the flash power level to maintain a constant light power J at the corresponding flash power level; Step S52, when the voltage V fluctuates, Step S521, if the voltage V increases and the power P increases, the controller 100 decreases the PWM pulse width T; Step S522, if the voltage V decreases and the power P decreases, the controller 100 increases the PWM pulse width T.

[0043] Specifically, the voltage detection module 600 is preferably a voltage divider sampling unit, with its input end connected to the high-voltage busbar and its output end electrically connected to the AD sampling pin of the controller 100. The voltage divider sampling unit can reduce the high-voltage DC current of the busbar by a fixed ratio, converting it into a low-voltage sampling signal recognizable by the controller 100, thereby achieving real-time detection of the busbar voltage V. The circuit internal resistance R is the equivalent internal resistance of the high-intensity pulse drive circuit, including the internal resistance of the energy storage unit, the conduction internal resistance of the MOS transistor, the internal resistance of the pulse LED 400, and the parasitic resistance of the line. The circuit internal resistance R is calibrated during the circuit design phase and pre-stored in the storage unit 110 of the controller 100. After receiving the sampling signal transmitted by the voltage detection module 600, the controller 100 calculates the real-time busbar voltage V based on the preset voltage division ratio, and then calculates the real-time power P of the current circuit according to the formula P=V² / R, providing data support for subsequent PWM pulse width adjustment.

[0044] During flash control, the controller 100 executes two control logics based on the target constant optical power formula J=N×P×T: 1. Control logic under stable voltage conditions When the voltage V fed back by the voltage detection module 600 remains stable, the value of the real-time electrical power P is basically constant. At this time, the state of the PWM signal output by the controller 100 is determined by the currently locked flash power level N. The controller 100 directly calls the pre-stored PWM pulse width parameter for this level, without needing to adjust the pulse width T, and can accurately maintain the target constant optical power J corresponding to this level.

[0045] 2. Compensation control logic under voltage fluctuation conditions When the voltage V fed back by the voltage detection module 600 fluctuates, the controller 100 activates the dynamic compensation mechanism: if the voltage V increases, the real-time electrical power P increases synchronously. To prevent the optical power J from exceeding the target value, the controller 100 calculates the compensated PWM pulse width in reverse according to the increase in electrical power P using the formula T=J / (N×P), and outputs the reduced PWM pulse width T to offset the increase in optical power caused by the increase in electrical power; if the voltage V decreases, the real-time electrical power P decreases synchronously. To prevent the optical power J from falling below the target value, the controller 100 calculates the compensated PWM pulse width in reverse according to the decrease in electrical power P using the formula T=J / (N×P), and outputs the increased PWM pulse width T to compensate for the decrease in optical power caused by the decrease in electrical power.

[0046] Through the voltage detection and dynamic compensation mechanism described above, regardless of whether the bus voltage fluctuates, the controller 100 can adjust the PWM pulse width T to ensure that the light power output by the pulse LED 400 is always consistent with the target value of the current setting, thus ensuring the stability and consistency of the flashing effect.

[0047] like Figure 10 As shown, the present invention provides a preferred embodiment of a flash control method for intense pulsed light.

[0048] The steps of the flash control method include: Step S61: When the controller 100 enters the standby mode, if no valid control signal from any trigger module is detected for a preset time, the controller 100 controls the strong light pulse drive circuit to shut down and enter a sleep state; Step S62: The start button module 800 is triggered again, and the controller 100 wakes up and resumes the standby mode.

[0049] Specifically, after entering standby mode, the controller 100 maintains real-time scanning and detection of signals from the button trigger module 710 and the touch key trigger module 720. Simultaneously, the built-in timing module enters its working state. The timing value of the timing module is immediately reset and restarted upon detecting a valid control signal from any trigger module, ensuring that timing only applies to idle periods without operation. If, during the timing process, the controller 100 does not detect a press signal from the button trigger module 710, a touch signal from the touch key trigger module 720, or any other valid control signal from the trigger module, the controller 100 will determine that the system is in an idle state without operation after the preset timing period has elapsed. It will then output a sleep control command, disconnecting the non-core power supply circuit in the high-intensity pulse drive circuit, cutting off power to high-power modules such as the pulse LED 400 and the drive module 200, and retaining only the controller 100's own low-power power supply unit. This allows the entire circuit system to enter a low-power sleep state, effectively reducing power consumption during periods of inactivity and improving the device's battery life.

[0050] When the system is in sleep mode, the controller 100 only maintains the signal detection function of the start button module 800, while all other functional modules are turned off. At this time, the trigger button module 710 and the touch button trigger module 720 cannot generate effective control signals, thus avoiding accidental touch operations in sleep mode. When the user needs to use the device again, the start button module 800 is manually triggered. The start button module 800 sends a wake-up trigger signal to the controller 100. After receiving the signal, the controller 100 immediately exits the sleep mode, re-outputs the power supply control command, restores the normal power supply to each module of the high-intensity pulse drive circuit, and performs initialization operations again, including detecting the bus voltage, scanning the signal status of each trigger module, and loading the default flash power level. After initialization is completed, the controller 100 enters standby mode again, waiting for subsequent operation commands from the user, ensuring that the device can quickly respond to flash triggering needs after being woken up.

[0051] like Figure 11 As shown, the present invention provides a preferred embodiment of a flash control method for intense pulsed light.

[0052] The controller 100 pre-stores multiple flash count parameters and a fixed value for the single PWM pulse width corresponding to each flash count level. The fixed value for the single PWM pulse width remains unchanged within a single flash cycle after being selected. The steps of the flash control method include: Step S71: When the two trigger modules output valid control signals at the same time, the controller 100 reads the selected flash count level and the corresponding fixed PWM pulse width value. Step S72: The controller 100 cyclically outputs PWM signals of the same pulse width to the drive switch module 300 at preset intervals to trigger the pulse LED 400 to flash; during the flashing process, the controller 100 locks the PWM pulse width parameter.

[0053] In this embodiment, the controller 100 pre-stores multiple flash count parameters and a fixed single PWM pulse width value corresponding to each flash count level. The fixed single PWM pulse width value remains unchanged within a single multi-flash cycle after selection. Specifically, the controller 100's built-in storage unit 110 pre-stores multiple flash count parameters, each level corresponding to a different number of consecutive flashes, and each flash count level is individually matched with a calibrated fixed single PWM pulse width value. The fixed pulse width value is pre-calculated and calibrated based on the application requirements, target optical power, and circuit rated parameters of the corresponding flash count level. Its value is adapted to the flash count and target optical power to ensure that the energy output of a single flash meets the usage requirements. The single multi-flash cycle is the entire process from the moment the controller 100 triggers the flash to the completion of the selected number of continuous flashes and the PWM signal output stops. Once a certain number of flashes is selected, the corresponding single PWM pulse width fixed value is locked. During this multi-flash cycle, no matter what changes occur in the circuit conditions, the pulse width value remains unchanged, ensuring the consistency of the pulse width of each flash within the same multi-flash cycle, thereby achieving uniform and consistent energy and optical power output for each flash.

[0054] After completing parameter reading and verification, the controller 100 cyclically outputs a PWM drive signal of equal pulse width to the drive switch module 300 according to the pre-stored flash interval parameters. The pulse width of this PWM signal is strictly consistent with the fixed value of the single PWM pulse width read, and the output interval between two adjacent PWM signals is a preset fixed duration, ensuring a uniform rhythm of continuous flashing. Each time a PWM signal is output, the drive switch module 300 turns on / off according to the signal command, and in conjunction with the high-voltage trigger pulse output by the drive module 200, sequentially triggers the pulse LED 400 to complete multiple continuous flashes. The ignition and extinguishing of each flash are precisely controlled by the PWM signal of equal pulse width. During the entire flashing cycle, the controller 100 performs a forced locking operation on the PWM pulse width parameter. Regardless of small fluctuations in voltage and current in the circuit, the pulse width value is not adjusted, and the same PWM signal is continuously output until the selected number of flashes is completed. This fundamentally ensures that the pulse width of each flash within a single flashing cycle is without deviation, achieving consistency and stability of continuous flashing.

[0055] refer to Figure 12 and Figure 13This paper details a high-intensity light pulse driving circuit and provides a specific and feasible solution. The high-intensity light pulse driving circuit includes a controller 100, which includes a pulse chip U4. The pulse chip U4 integrates AD sampling, pulse generation, and drive output functions. It samples the bus voltage through AD_Vch to obtain the required pulse width and outputs a drive signal from the OUT pin to the MOS transistor Q1 to control the on / off state of the MOS transistor Q1. The drive module 200 includes a pulse transformer T1, which senses the low-voltage pulse on the primary side to the secondary side, generating a high-voltage trigger pulse to directly drive the trigger electrode of the pulse LED 400, enabling the pulse LED 400 to conduct quickly. Resistors R15, R42, and R45 form a voltage divider and current limiting circuit to convert the low-voltage signal output by the controller 100 into a drive current suitable for the primary side of the pulse transformer T1. Capacitor C8 is a DC blocking capacitor used to couple AC pulse signals and block DC components. The auxiliary power supply 500 is used to obtain electrical energy from the high-voltage DC (310V) output from the bus and convert the obtained electrical energy into low-voltage DC such as 15V and 5.5V to provide a stable operating power supply for low-voltage circuits such as the controller 100, thus achieving electrical isolation between high-voltage input and low-voltage output. The voltage detection module 600 consists of resistors R11, R12, R13, and R14, and is used to step down and sample the high-voltage DC (310V) output from the bus. Capacitor C7 is used to filter out high-frequency noise in the sampled voltage, and resistor R10 connects the sampling point AD_Vch to the AD sampling terminal of the controller 100, enabling the controller 100 to obtain the bus voltage value in real time and thus dynamically adjust the output value.

[0056] The above description is merely the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the claims of the present invention are covered by the present invention.

Claims

1. A flash control method for intense pulsed light, applied to an intense pulsed light driving circuit, characterized in that, The high-intensity pulse driving circuit includes a controller, a driving module, a driving switch module, and a pulse LED. The output terminal of the controller is connected to the control terminal of the driving switch module. One open / closed terminal of the driving switch module is connected to the negative terminal of the pulse LED and the driving module, respectively. The other open / closed terminal of the driving switch module is grounded. The positive terminal of the pulse LED is connected to the busbar, and the trigger terminal of the pulse LED is connected to the driving module. The flash control method includes the following steps: after the controller triggers the flash mode, it outputs a PWM signal to the drive switch module to control the on / off state and / or flashing of the pulse LED, and controls the flashing frequency of the pulse LED by adjusting the pulse width of the PWM signal.

2. The flash control method according to claim 1, characterized in that, The high-intensity pulse driving circuit includes at least two trigger modules, both of which are connected to the controller. The flash control method includes the following steps: if both trigger modules output valid control signals to the controller after being triggered, the controller detects and determines that the two valid control signals are valid, and then starts to output PWM signals to enter the flash mode.

3. The flash control method according to claim 2, characterized in that, The two triggering modules are a button triggering module and a touch key triggering module.

4. The flash control method according to claim 2, characterized in that, The high-intensity light pulse driving circuit also includes a start button module connected to the controller. The steps of the flash control method include: triggering the start button module after power-on, the controller starts working, and detects and monitors the working status of the two trigger modules, and enters standby mode.

5. The flash control method according to claim 1, characterized in that, The controller is configured with at least two different flash power levels. Different flash power levels correspond to different target constant light power of the pulse LED. The state of the PWM signal output by the controller is determined by the currently selected flash power level. The target constant light power satisfies the formula J=N×P×T, where N is the level, P is the electrical power, and T is the PWM signal pulse width.

6. The flash control method according to claim 5, characterized in that, The flash control method includes the following steps: the controller receives a power level selection signal, and determines and locks the current flash power level based on the power level selection signal; The controller pre-stores the corresponding PWM pulse width parameters for each of the flash power levels, and when outputting the PWM signal, it calls the PWM pulse width parameters of the corresponding level to perform drive control.

7. The flash control method according to claim 5, characterized in that, The high-intensity light pulse driving circuit also includes a voltage detection module connected to the controller. The voltage detection module is connected to the bus and is used to detect the voltage V output to the pulse LED in real time and transmit the detection signal to the controller. The controller calculates the power P based on the detected voltage V, where P = V × I = V² / R, and R is the circuit internal resistance. The steps of the flash control method include: When the voltage V remains constant, the state of the PWM signal is determined by the flash power level to maintain a constant optical power J at the corresponding flash power level. When the voltage V fluctuates, if the voltage V increases and the electrical power P increases, the controller decreases the PWM pulse width T. If the voltage V decreases and the electrical power P decreases, the controller increases the PWM pulse width T.

8. The flash control method according to claim 4, characterized in that, The steps of the flash control method include: when the controller enters standby mode, if no valid control signal from any trigger module is detected for a preset time, the controller controls the strong light pulse drive circuit to shut down and enter a sleep state; the controller is then awakened and returns to standby mode by re-triggering the start button module.

9. The flash control method according to claim 2, characterized in that, The controller pre-stores multiple flash count parameters and a fixed single PWM pulse width value corresponding to each flash count level. The fixed single PWM pulse width value remains unchanged within a single multi-flash cycle after being selected. The steps of the flash control method include: When both trigger modules output valid control signals simultaneously, the controller reads the selected flash count level and the corresponding fixed PWM pulse width value. The controller cyclically outputs PWM signals of the same pulse width to the drive switch module at preset intervals to trigger the pulse LED to flash; during the flashing process, the controller locks the PWM pulse width parameter.

10. A high-intensity light (HIFL) hair removal device, characterized in that: The intense light hair removal device includes a main control circuit board and a pulse light-emitting diode. The main control circuit board has a built-in intense light pulse driving circuit as described in any one of claims 1 to 9 to control the pulse light-emitting diode to perform the flash control method as described in any one of claims 1 to 9.

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