Overclocking pulse light control circuit

Abstract

The invention relates to the field of electronic circuits, and discloses an overclocking pulse light control circuit which comprises a control module, a constant voltage module and a constant current module. The control module is electrically connected with the constant voltage module and the constant current module, the constant voltage module is connected with the anode of the LED module, and the constant current module is connected with the cathode of the LED module. According to the LED module, the constant voltage module is arranged at the anode of the LED module, and the constant current module is arranged at the cathode of the LED module, so that the LED module can emit overclocking pulse light EMF (excised pulse light) with a uniform light beautifying effect.

Description

Technical Field

[0001] This invention relates to electronic circuits, and more particularly to an ultra-high frequency pulsed light control circuit. Background Technology

[0002] Existing phototherapy devices suffer from slow pulse waveform changes in their pulsed light control, resulting in poor phototherapy effects. With technological advancements, high-frequency pulse control circuits have gradually emerged, such as the technical solution disclosed in CN210845006U. This involves connecting an LED driver circuit in series with the cathode of an LED lamp. While this allows for control of the LED lamp's switching frequency, the intensity of the light pulses is uneven. As the number of LED beads increases, this unevenness becomes more pronounced. This is because changing the pulse frequency of the light-emitting element is achieved by altering the frequency of the driving voltage, or by varying the conduction voltage of each LED element. Ultimately, this results in different currents flowing through the light-emitting elements, leading to inconsistent brightness across multiple elements and consequently, uneven phototherapy effects. Summary of the Invention

[0003] This invention provides an ultra-high frequency pulsed light control circuit to solve the problem of uneven light beauty effects when using existing light beauty devices.

[0004] To address the aforementioned technical problems, the present invention adopts the following technical solution:

[0005] The present invention provides an ultra-high frequency pulsed light control circuit comprising: a control module, a constant voltage module, and a constant current module; the control module is electrically connected to the constant voltage module and the constant current module respectively, the constant voltage module is connected to the anode of the LED module, and the constant current module is connected to the cathode of the LED module.

[0006] Optionally, the constant voltage module includes: a first transistor, a second transistor, a first resistor, and a second resistor. The two ends of the first resistor are connected to the emitter and base of the first transistor, respectively. The emitter of the first transistor is connected to the voltage input terminal of the constant voltage module. The collector of the first transistor is connected to the anode of the LED module. The base of the first transistor is connected to the collector of the second transistor through the second resistor. The base of the second transistor is connected to the control module through the first transistor driving unit. The emitter of the second transistor is grounded.

[0007] Optionally, the first transistor driving unit includes a third transistor, a Schottky diode, a third resistor, and a first capacitor;

[0008] The emitter of the third transistor is connected to the base of the second transistor and the cathode of the Schottky diode. The collector of the third transistor is grounded. The base of the third transistor is connected to the anode of the Schottky diode. The anode of the Schottky diode is connected to the control module through the third resistor. The first capacitor is connected in parallel with the third resistor.

[0009] Optionally, the constant current module includes: a fourth transistor, a fifth transistor, a sixth transistor, a fifth resistor, and a sixth resistor; the base of the fourth transistor is connected to the control module through a second transistor driving unit, the emitter of the fourth transistor is connected to a reference voltage, the collector of the fourth transistor is connected to the collector of the fifth transistor, the fifth resistor is connected across the base and collector of the fifth transistor, the emitter of the fifth transistor is connected to the base of the sixth transistor, the collector of the sixth transistor is connected to the cathode of the LED module, and the emitter of the sixth transistor is grounded through the sixth resistor.

[0010] Optionally, the second transistor driving unit includes a fourth resistor and a second capacitor. One end of the fourth resistor is connected to the control module, and the other end is connected to the base of the fourth transistor. The second capacitor is connected in parallel with the fourth resistor.

[0011] Optionally, the system may also include a detection module, wherein the positive input terminal of the detection module is connected to the first terminal of the sixth resistor, the negative input terminal of the detection module is grounded, and the output terminal of the detection module is connected to the control module.

[0012] Optionally, it also includes a power supply module connected to the control module and the constant voltage module. The power supply module includes a delayed start unit, a switch detection unit, and a power supply unit connected in sequence. The delayed start unit is electrically connected to the adapter, and the power supply unit is electrically connected to the control module and the constant voltage module.

[0013] Optionally, the power supply unit includes a seventh transistor, a first switching transistor, a twenty-first resistor, and a power detection component; the base of the seventh transistor is connected to the control module through a fourteenth resistor, the collector of the seventh transistor is connected to the control terminal of the first switching transistor, the base of the seventh transistor is grounded through a fifteenth resistor, the first terminal of the first switching transistor is connected to the output terminal of the switching detection unit, the second terminal of the first switching transistor is connected to the constant voltage module through the twenty-first resistor, a sixteenth resistor is also connected between the first terminal and the control terminal of the first switching transistor, the positive and negative input terminals of the power detection component are respectively connected to the two ends of the twenty-first resistor, and the output terminal of the power detection component is connected to the control module.

[0014] Optionally, the power detection component includes a current amplification chip, and the output of the current amplification chip is connected to the control module through a second-order RC filter component.

[0015] Optionally, the delay start unit includes a second switching transistor. The first end of the second switching transistor is connected to the input terminal of the delay start unit. The input terminal of the delay start unit is also grounded through a second bidirectional diode. The first end of the second switching transistor is also connected to the first end of a twenty-third resistor. The twenty-third resistor and the twenty-fourth resistor are connected in series and then grounded. The twenty-third resistor is also connected in parallel with a twelfth capacitor. The second end of the twenty-third resistor is connected to the first end of a twenty-fifth resistor. The second end of the twenty-fifth resistor is connected to the control terminal of the second switching transistor. The second end of the second switching transistor is connected to the output terminal of the delay start unit through a second diode. The output terminal of the delay start unit is connected to the input terminal of the switch detection unit. The anode of the second diode is grounded through a thirteenth capacitor. The cathode of the second diode is connected to the anode of a polarized capacitor, and the cathode of the polarized capacitor is grounded.

[0016] This invention provides an ultra-high frequency pulsed light control circuit comprising a control module, a constant voltage module, and a constant current module. The control module is electrically connected to both the constant voltage module and the constant current module. The constant voltage module is connected to the anode of an LED module, and the constant current module is connected to the cathode of the LED module. This invention enables the LED module to emit ultra-high frequency pulsed light (EMF) with uniform beauty effects by simultaneously setting a constant voltage module at the anode and a constant current module at the cathode. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an ultra-high frequency pulsed light control circuit provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the constant voltage module provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the constant current module provided in an embodiment of the present invention;

[0021] Figure 4This is a schematic diagram of another high-frequency pulsed light control circuit provided in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of an ultra-high frequency pulsed light control circuit provided in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of another high-frequency pulsed light control circuit provided in an embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the power module provided in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the power supply unit provided in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the delayed start-up unit provided in an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of the switch detection unit provided in an embodiment of the present invention. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0029] Based on the above-mentioned technical problems, this embodiment proposes the following solutions:

[0030] Figure 1 This is a schematic diagram of an ultra-high frequency pulsed light control circuit provided in an embodiment of the present invention. See also... Figure 1 The high-frequency pulse light control circuit provided in this embodiment includes: a control module 1, a constant voltage module 2, and a constant current module 3; the control module 1 is electrically connected to the constant voltage module 2 and the constant current module 3 respectively, the constant voltage module 2 is connected to the anode of the LED module, and the constant current module 3 is connected to the cathode of the LED module.

[0031] Specifically, in this embodiment, the high-frequency pulse light control circuit is used as the control circuit for the light source of the phototherapy device, aiming to emit high-frequency pulse light EMF (excess mega frequency) with uniform phototherapy effects. In this embodiment, the constant voltage module 2 provides a stable voltage source for the LED module, and the control module 1 outputs a high-frequency pulse voltage to control the rapid on and off of the constant voltage module 2, thereby controlling the lighting and off of the LED module, and thus outputting high-frequency pulse light EMF (excess mega frequency). At the same time, in this embodiment, a constant current module 3 is also set at the cathode terminal of the LED module, and the constant current module 3 is directly connected to the cathode terminal of the LED module. During the process of driving the LED module to emit light, even if the conduction voltages between multiple LED light-emitting elements in the LED module are not equal, the constant current module 3 can keep the current in the circuit constant at the set value, thereby ensuring that the luminous intensity of each light-emitting element in the LED module is the same. In addition, the different frequencies of the voltage pulses provided by the constant voltage module 2 to the LED module will also cause the luminous brightness of the LED module to be different. In this embodiment, by setting the constant current module 3, the influence of increasing the voltage pulse frequency on the luminous brightness is avoided, so that the LED module can emit pulse light with uniform intensity, forming an ultra-high frequency pulse light EMF (excess mega frequency) with uniform light beauty effect, thus improving the light beauty effect.

[0032] Figure 2 This is a schematic diagram of the constant voltage module provided in an embodiment of the present invention. See also... Figure 2 In another embodiment of this application, the constant voltage module 2 includes: a first transistor Q1, a second transistor Q2, a first resistor R1, and a second resistor R2. The two ends of the first resistor R1 are connected to the emitter and base of the first transistor Q1, respectively. The emitter of the first transistor Q1 is connected to the voltage input terminal VEMS of the constant voltage module 2. The collector of the first transistor Q1 is connected to the anode of the LED module. The base of the first transistor Q1 is connected to the collector of the second transistor Q2 through the second resistor R2. The base of the second transistor Q2 is connected to the control module 1 (MCU) through the first transistor driving unit 21. The emitter of the second transistor Q2 is grounded.

[0033] Specifically, in this embodiment, the anode of the LED module is connected to the voltage input terminal VEMS of the constant voltage module 2 by turning the first transistor Q1 on and off. If the first transistor Q1 is on, the anode of the LED module is connected to the voltage input terminal VEMS. If the constant current module 3 is also on, the LED module emits light. Conversely, if the first transistor Q1 is not on, even if the constant current module 3 is on, the LED module does not emit light. In this embodiment, the first transistor Q1 is a PNP transistor, and the second transistor Q2 is an NPN transistor. The collector of the second transistor Q2 is connected to the base of the first transistor Q1 through a second resistor R2. The base of the first transistor Q1 is also connected to the voltage input terminal VEMS of the constant voltage module 2 through a first resistor R1. The emitter of the second transistor Q2 is grounded. When the second transistor Q2 is not conducting, the base of the first transistor Q1 is at a high voltage, and the first transistor Q1 is not conducting. When the second transistor Q2 is conducting, the base of the first transistor Q1 is grounded through the second resistor R2, and the potentials of both the base and collector of the first transistor Q1 are lower than the emitter potential, so the first transistor Q1 is conducting. In this embodiment, the control module can control the conduction and shutdown of the second transistor Q2 through the first transistor driving unit 21, thereby controlling the conduction and shutdown of the first transistor Q1, realizing the rapid conduction and shutdown of the first transistor Q1.

[0034] Continue to refer to Figure 2 In another embodiment of this application, the first transistor driving unit 21 includes a third transistor Q3, a Schottky diode D1, a third resistor R3, and a first capacitor C1; the emitter of the third transistor Q3 is connected to the base of the second transistor Q2 and the cathode of the Schottky diode D1, the collector of the third transistor Q3 is grounded, the base of the third transistor Q3 is connected to the anode of the Schottky diode D1, the anode of the Schottky diode D1 is connected to the control module 1 through the third resistor R3, and the first capacitor C1 is connected in parallel with the third resistor R3.

[0035] Specifically, to increase the turn-on and turn-off frequency of the second transistor Q2, in this embodiment, the first capacitor C1 and the third resistor R3 are used to achieve fast charging of the second transistor Q2 to shorten the rise time of the pulse square wave, and the third transistor Q3 and the Schottky diode D1 are used to achieve fast discharging of the second transistor Q2 to shorten the fall time of the pulse square wave. In this embodiment, by shortening the rise time of the pulse square wave through the first capacitor C1 and the third resistor R3, the turn-on time of the second transistor Q2 is reduced. By shortening the fall time of the pulse square wave through the third transistor Q3 and the Schottky diode D1, the turn-off time of the second transistor Q2 is reduced. This increases the number of pulses within the same period and improves the pulse frequency of the LED module.

[0036] Figure 3 This is a schematic diagram of the constant current module provided in an embodiment of the present invention. See also... Figure 3 In another embodiment of this application, the constant current module 3 includes: a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a fifth resistor R5, and a sixth resistor R6; the base of the fourth transistor Q4 is connected to the control module 1 through the second transistor driving unit 31, the emitter of the fourth transistor Q4 is connected to the reference voltage VOLCURRENT, the collector of the fourth transistor Q4 is connected to the collector of the fifth transistor Q5, the fifth resistor R5 is connected across the base and collector of the fifth transistor Q5, the emitter of the fifth transistor Q5 is connected to the base of the sixth transistor Q6, the collector of the sixth transistor Q6 is connected to the cathode of the LED module, and the emitter of the sixth transistor Q6 is grounded through the sixth resistor R6.

[0037] Specifically, to reduce the impact of differences in the conduction voltage and voltage fluctuations of LED components on the luminous intensity of the LED module, this embodiment sets a constant current module 3 at the cathode of the LED module. The conduction and cutoff of the sixth transistor Q6 directly affect the on / off state of the LED module. In this embodiment, the fifth resistor R5 and the fifth transistor Q5 form a voltage follower. The emitter of the fourth transistor Q4 is connected to the reference voltage VOLCURRENT. The fourth transistor Q4 is a PNP transistor. When the voltage output from the control module 1 to the first terminal of the second transistor driving unit 31 is low, the fourth transistor Q4 is turned on, and the base potential of the sixth transistor Q6 is the same as the reference voltage VOLCURRENT. By setting the reference voltage VOLCURRENT within an appropriate range, the sixth transistor Q6 is in the amplification state. At this time, the relationship between the currents of the three electrodes of the sixth transistor Q6 is I. C =βI B I E =I C +I B , among which, I C Collector current, I B For the base current, I E Since the current is the emitter current, as long as the reference voltage VOLCURRENT remains unchanged, the base voltage of the sixth transistor Q6 will not change, and the current flowing through the sixth transistor Q6 will not change, thus achieving constant current drive of the LED module.

[0038] Continue to refer to Figure 3In another embodiment of this application, the second transistor driving unit 31 includes a fourth resistor R4 and a second capacitor C2. One end of the fourth resistor R4 is connected to the control module 1, and the other end is connected to the base of the fourth transistor Q4. The second capacitor C2 is connected in parallel with the fourth resistor R4.

[0039] Specifically, in order to increase the turn-on and turn-off frequency of the fourth transistor Q4, the second capacitor C2 and the fourth resistor R4 in this embodiment are used to realize the fast charging of the fourth transistor Q4, so as to shorten the rise time of the pulse square wave, reduce the time required for the fourth transistor Q4 to turn on, increase the number of pulses in the same period, and improve the pulse frequency of the LED module.

[0040] Figure 4 This is a schematic diagram of another high-frequency pulsed light control circuit provided in an embodiment of the present invention. Figure 5 This is a schematic diagram of another high-frequency pulsed light control circuit provided in an embodiment of the present invention. See also... Figure 4 and Figure 5 In this embodiment, the overclocking pulse light control circuit also includes a detection module 4. The positive input terminal of the detection module 4 is connected to the first terminal of the sixth resistor R6, the negative input terminal of the detection module 4 is grounded, and the output terminal of the detection module 4 is connected to the control module 1.

[0041] Specifically, in order to prevent abnormalities in the control circuit from causing the transistor to overheat, a detection module 4 is also provided in this embodiment. The detection module 4 is used to detect the current value flowing through the sixth resistor R6 and feeds back the detected current value to the control module 1. The control module 1 compares the detected current value with the current set value. When the detected current value is too large or too small, an alarm is issued to prevent the transistor from overheating and being damaged.

[0042] To improve the accuracy of current detection, detection module 4 uses a differential follower principle for current detection. Detection module 4 is a differential follower unit. The positive input terminal of the differential follower unit is connected to the first terminal of the sixth resistor R6, the negative input terminal of the differential follower unit is grounded, and the output terminal of the differential follower unit is connected to control module 1. The differential follower unit includes a differential operational amplifier U1. The positive input terminal of the differential operational amplifier U1 is connected to the first terminal of the sixth resistor R6 through a series connection of a tenth resistor R10 and a twelfth resistor R12. The negative input terminal of the differential operational amplifier U1 is grounded through a series connection of an eleventh resistor R11 and a thirteenth resistor R13. A series connection of a fourth capacitor C4 and a fifth capacitor C5 is also connected between the second terminals of the tenth resistor R10 and the eleventh resistor R11. The first terminal of the fourth capacitor C4 is connected to the second terminal of the tenth resistor R10, and the second terminal of the fourth capacitor C4 and the first terminal of the fifth capacitor C5 are connected and grounded. The second terminal of the fifth capacitor C5 is connected to the second terminal of the eleventh resistor R11, thus realizing the input part of the differential follower unit.

[0043] To improve the accuracy of the differential follower unit's voltage detection, in this embodiment, the positive input terminal of the differential operational amplifier U1 is grounded through the ninth resistor R9. Simultaneously, an eighth resistor R8 is connected between the output and negative input terminals of the differential operational amplifier U1. Therefore, the amplification factor of the input and output voltages of the differential operational amplifier U1 can be determined by the ratio between the eighth resistor R8 and the ninth resistor R9. The specific value is determined as needed and will not be elaborated further in this embodiment. The output terminal of the differential operational amplifier U1 is connected to the control module 1 through the seventh resistor R7. The voltage value collected at the first terminal of the sixth resistor R6 is amplified differentially and transmitted to the control module 1. The control module 1 obtains the current value flowing through the sixth resistor R6 using this voltage value and the resistance value of the sixth resistor R6. The control module 1 compares the obtained current value with the current setpoint. If the detected current value is too high or too low, an alarm is issued to prevent overheating and damage to the transistors in the control circuit.

[0044] Figure 6 This is a schematic diagram of another high-frequency pulsed light control circuit provided in an embodiment of the present invention. Figure 7 This is a schematic diagram of the power module provided in an embodiment of the present invention. (Reference) Figure 6 and Figure 7 In this embodiment, the overclocking pulse control module also includes a power supply module 5 connected to the control module 1 and the constant voltage module 2. The power supply module 5 includes a delay start unit 51, a switch detection unit 52 and a power supply unit 53 connected in sequence. The delay start unit 51 is electrically connected to the adapter, and the power supply unit 53 is electrically connected to the control module 1 and the constant voltage module 2.

[0045] Specifically, in this embodiment, the overclocking pulse light control circuit also includes a power supply module 5. The power supply module 5 is connected to the constant voltage module 2 and the control module 1 respectively. The control module 1 can directly control the power supply module 5 to provide voltage to the constant voltage module 2, and the power supply module 5 is also used to provide voltage to the control module 1. By setting the power supply module 5 as a delayed start unit 51, a switch detection unit 52, and a power supply unit 53 connected in sequence, the phenomenon of arcing when plugging in the power supply can be effectively prevented when the instantaneous current of the downstream circuit is too large. At the same time, the delayed start unit 51 can also have an input voltage detection function, which can prevent damage to the downstream circuit when the wrong adapter is used. The switch detection unit 52 is used to detect the user's key signal. After the switch detection unit 52 detects the user's key, the switch detection unit 52 is turned on and transmits the voltage provided by the adapter to the power supply unit 53. The power supply unit 53 supplies power to the constant voltage module 2 according to the control signal of the control module 1.

[0046] Figure 8 This is a schematic diagram of the power supply unit provided in an embodiment of the present invention, for reference. Figure 8 The power supply unit 53 includes a seventh transistor Q7, a first switching transistor MOS1, a twenty-first resistor R21, and a power detection component. The base of the seventh transistor Q7 is connected to the control module 1 through a fourteenth resistor R14, the collector of the seventh transistor Q7 is connected to the control terminal of the first switching transistor MOS1, the base of the seventh transistor Q7 is grounded through a fifteenth resistor R15, the first terminal of the first switching transistor MOS1 is connected to the output terminal of the switching detection unit 52, the second terminal of the first switching transistor MOS1 is connected to the constant voltage module 2 through the twenty-first resistor R21, a sixteenth resistor R16 is also connected between the first terminal and the control terminal of the first switching transistor MOS1, the positive input terminal and the negative input terminal of the power detection component are respectively connected to the two ends of the twenty-first resistor R21, and the output terminal of the power detection component is connected to the control module 1.

[0047] Specifically, to enable the power supply unit 53 to turn on and off, the power supply unit 53 includes a seventh transistor Q7, a first switching transistor MOS1, and a twenty-first resistor R21. In this embodiment, the first switching transistor MOS1 is a PMOS transistor, and the seventh transistor Q7 is an NPN transistor. The first terminal of the first switching transistor MOS1 is connected to the output terminal of the switch detection unit 52, and the second terminal of the first switching transistor MOS1 is connected to the constant voltage module 2 through the twenty-first resistor R21. The control terminal of the first switching transistor MOS1 is connected to the collector of the seventh transistor Q7, and the emitter of the seventh transistor Q7 is grounded. The control module 1 is connected to the base of the seventh transistor Q7 through the fourteenth resistor R14. When the control module 1 transmits the wake-up voltage Wok to the base of the seventh transistor Q7... When ePower is high, transistor Q7 is turned on, and the control terminal of the first switching transistor MOS1 is grounded through the turned-on transistor Q7. When the control terminal of the first switching transistor MOS1 is low, the first switching transistor MOS1 is turned on, and thus the output voltage VEMS of the first switching transistor MOS1 is the same as the input voltage VCC, completing the conduction of the power supply unit 53 and starting to supply power to the constant voltage module 2. Similarly, when the wake-up voltage WokePower transmitted from the control module 1 to the base of transistor Q7 is low, transistor Q7 is turned off, and the control terminal of the first switching transistor MOS1 is connected to the input voltage VCC through the sixteenth resistor R16, which is high. When this is high, the first switching transistor MOS1 is turned off, the power supply unit 23 is turned off, and the power supply to the constant voltage module 3 is stopped.

[0048] To detect the power of the LED module, the power supply unit 53 in this embodiment also includes a power detection component. The positive and negative input terminals of the power detection component are connected to the two ends of the 21st resistor R21, respectively. The output terminal of the power detection component is connected to the control module 1. The power detection component transmits the detected voltage CURRENT WORK to the control module 1. The 21st resistor R21 acts as a sampling resistor. The power detection component collects the voltage across the 21st resistor R21 and then transmits it to the control module 1. The control module 1 can calculate the current through the 21st resistor R21 based on the voltage across the 21st resistor R21, and thus calculate the power of the LED module.

[0049] Continue to refer to Figure 8 The power detection component includes a current amplifier chip U2, and the output terminal of the current amplifier chip U2 is connected to the control module 1 through a second-order RC filter component.

[0050] In order to reduce the interference caused by the high voltage ripple generated when the overclocked pulse light control circuit is working, the power detection component in this embodiment includes a current amplifier chip U2, and the output terminal of the current amplifier chip U2 is connected to the control module 1 through a second-order RC filter component.

[0051] refer to Figure 8 The second-order RC filter component includes an eighteenth resistor R18 and a nineteenth resistor R19 connected in series. The first end of the eighteenth resistor R18 is grounded through an eighth capacitor C8, and the second end of the eighteenth resistor R18 is grounded through a ninth capacitor C9. The second end of the eighteenth resistor R18 is also connected to the first end of the nineteenth resistor R19. The second end of the nineteenth resistor R19 is connected to the output terminal of the current amplifier chip U2. At the same time, the second end of the eighteenth resistor R18 is also connected to the control module 1. The current amplifier chip U2 transmits the voltage CURRENTWORK to the control module 1 through the second-order RC filter circuit. The control module 1 calculates the power of the LED module based on the voltage CURRENTWORK and the resistance value of the twenty-first resistor R21.

[0052] Figure 9 This is a schematic diagram of the delayed start-up unit provided in an embodiment of the present invention; see reference. Figure 9 In this embodiment, the delay start unit 51 includes a second switching transistor MOS2. The first terminal of the second switching transistor MOS2 is connected to the input terminal of the delay start unit 51. The input terminal of the delay start unit 51 is also grounded through a second bidirectional diode DR2. The first terminal of the second switching transistor MOS2 is also connected to the first terminal of a twenty-third resistor R23. The twenty-third resistor R23 and the twenty-fourth resistor R24 ​​are connected in series and then grounded. The twenty-third resistor R23 is also connected in parallel with a twelfth capacitor C12. The second terminal of the twenty-third resistor R23 is connected to the first terminal of a twenty-fifth resistor R25. The second terminal of the twenty-fifth resistor R25 is connected to the control terminal of the second switching transistor MOS2. The second terminal of the second switching transistor MOS2 is connected to the output terminal of the delay start unit 51 through a second diode D2. The output terminal of the delay start unit 51 is connected to the input terminal of the switch detection unit 52. The anode of the second diode D2 is grounded through a thirteenth capacitor C13. The cathode of the second diode D2 is connected to the anode of a polarized capacitor E1. The cathode of the polarized capacitor E1 is grounded.

[0053] Specifically, the input terminal of the delay start unit 51 is connected to the adapter through terminal J1. In order to realize the overvoltage protection of the delay start unit 51, the input terminal of the delay start unit 51 is grounded through the second bidirectional diode DR2. When the adapter voltage is too high, it can prevent the delay start unit 51 and the subsequent circuit from being damaged.

[0054] On the other hand, in order to prevent the downstream circuit from experiencing excessive instantaneous current that could cause arcing during power-on, this embodiment includes a twelfth capacitor C12 and twentieth-third resistors R23, twenty-fourth resistors R24, and twenty-fifth resistors R25 for voltage division. By utilizing the characteristic that the voltage across the capacitor cannot change abruptly, the voltage at the first terminal of the second switching transistor MOS2 and the voltage at the control terminal change smoothly. The second switching transistor MOS2 only turns on after the capacitor has finished charging, thereby achieving delayed power-on startup and preventing the downstream circuit from experiencing excessive instantaneous current.

[0055] Figure 10 This is a schematic diagram of the switch detection unit provided in an embodiment of the present invention, for reference. Figure 10 The input terminal of the switch detection unit 52 is connected to 22V, and the output terminal of the switch detection unit 52 is connected to the voltage VCC. After the button receiver J2 receives the power-on signal, the voltage at the control terminal of the third switch transistor MOS3 decreases, and the third switch transistor MOS3 is turned on. The voltage VCC equals 22V. At the same time, the potential at the second terminal of the thirty-fourth resistor R34 changes. The control module 1 receives the power-on voltage signal POWERKEY through the second terminal of the thirty-fourth resistor R34, and then sends the power control voltage signal POWERCTL to the switch detection unit 52, which turns on the eighth transistor Q8. At this time, the control terminal of the third switch transistor MOS3 is grounded through the thirty-first resistor R31 and the turned-on eighth transistor Q8. Even if the power-on signal at the button receiver J2 disappears, the switch detection unit 52 can still continuously supply power to the power supply module 53, realizing the self-locking conduction of the switch detection unit 52.

[0056] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A high-frequency pulsed light control circuit, characterized in that, include: Control module, constant voltage module and constant current module; The control module is electrically connected to the constant voltage module and the constant current module respectively. The constant voltage module is connected to the anode of the LED module, and the constant current module is connected to the cathode of the LED module.

2. The high-frequency pulsed light control circuit according to claim 1, characterized in that, The constant voltage module includes: a first transistor, a second transistor, a first resistor, and a second resistor. The two ends of the first resistor are connected to the emitter and base of the first transistor, respectively. The emitter of the first transistor is connected to the voltage input terminal of the constant voltage module. The collector of the first transistor is connected to the anode of the LED module. The base of the first transistor is connected to the collector of the second transistor through the second resistor. The base of the second transistor is connected to the control module through the first transistor driving unit. The emitter of the second transistor is grounded.

3. The high-frequency pulsed light control circuit according to claim 2, characterized in that, The first transistor driving unit includes a third transistor, a Schottky diode, a third resistor, and a first capacitor; The emitter of the third transistor is connected to the base of the second transistor and the cathode of the Schottky diode. The collector of the third transistor is grounded. The base of the third transistor is connected to the anode of the Schottky diode. The anode of the Schottky diode is connected to the control module through the third resistor. The first capacitor is connected in parallel with the third resistor.

4. The high-frequency pulse light control circuit according to claim 1, characterized in that, The constant current module includes: a fourth transistor, a fifth transistor, a sixth transistor, a fifth resistor, and a sixth resistor; the base of the fourth transistor is connected to the control module through a second transistor driving unit, the emitter of the fourth transistor is connected to a reference voltage, the collector of the fourth transistor is connected to the collector of the fifth transistor, the fifth resistor is connected across the base and collector of the fifth transistor, the emitter of the fifth transistor is connected to the base of the sixth transistor, the collector of the sixth transistor is connected to the cathode of the LED module, and the emitter of the sixth transistor is grounded through the sixth resistor.

5. The high-frequency pulsed light control circuit according to claim 4, characterized in that, The second transistor driving unit includes a fourth resistor and a second capacitor. One end of the fourth resistor is connected to the control module, and the other end is connected to the base of the fourth transistor. The second capacitor is connected in parallel with the fourth resistor.

6. The high-frequency pulsed light control circuit according to claim 4, characterized in that, It also includes a detection module, the positive input terminal of which is connected to the first terminal of the sixth resistor, the negative input terminal of which is grounded, and the output terminal of which is connected to the control module.

7. The high-frequency pulsed light control circuit according to claim 1, characterized in that, It also includes a power supply module connected to the control module and the constant voltage module. The power supply module includes a delayed start unit, a switch detection unit and a power supply unit connected in sequence. The delayed start unit is electrically connected to the adapter and the power supply unit is electrically connected to the control module and the constant voltage module.

8. The high-frequency pulsed light control circuit according to claim 7, characterized in that, The power supply unit includes a seventh transistor, a first switching transistor, a twenty-first resistor, and a power detection component. The base of the seventh transistor is connected to the control module through a fourteenth resistor, the collector of the seventh transistor is connected to the control terminal of the first switching transistor, the base of the seventh transistor is grounded through a fifteenth resistor, the first terminal of the first switching transistor is connected to the output terminal of the switching detection unit, the second terminal of the first switching transistor is connected to the constant voltage module through the twenty-first resistor, a sixteenth resistor is also connected between the first terminal and the control terminal of the first switching transistor, the positive and negative input terminals of the power detection component are respectively connected to the two ends of the twenty-first resistor, and the output terminal of the power detection component is connected to the control module.

9. The high-frequency pulse light control circuit according to claim 8, characterized in that, The power detection component includes a current amplification chip, and the output of the current amplification chip is connected to the control module through a second-order RC filter component.

10. The high-frequency pulsed light control circuit according to claim 7, characterized in that, The delayed start unit includes a second switching transistor. The first end of the second switching transistor is connected to the input end of the delayed start unit. The input end of the delayed start unit is also grounded through a second bidirectional diode. The first end of the second switching transistor is also connected to the first end of a twenty-third resistor. The twenty-third resistor and the twenty-fourth resistor are connected in series and then grounded. The twenty-third resistor is also connected in parallel with a twelfth capacitor. The second end of the twenty-third resistor is connected to the first end of a twenty-fifth resistor. The second end of the twenty-fifth resistor is connected to the control end of the second switching transistor. The second end of the second switching transistor is connected to the output end of the delayed start unit through a second diode. The output end of the delayed start unit is connected to the input end of the switch detection unit. The anode of the second diode is grounded through a thirteenth capacitor. The cathode of the second diode is connected to the anode of a polarized capacitor. The cathode of the polarized capacitor is grounded.

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