Strobe light control circuit and strobe light circuit

Abstract

This utility model provides a strobe light control circuit and a strobe light circuit. The strobe light control circuit includes a signal input terminal, a delay control module, a voltage comparison module, and a logic control module. During the process of the strobe control input signal returning from a strobe-triggered state to a non-triggered state, the delay control module maintains the output delay through the charging process of the energy storage capacitor, preventing two adjacent strobe triggers from being too close together. The delay control module and the logic control module work together to limit the delay and adjust the timing of the strobe control output signal, improving the reliability and consistency of the strobe light control. This embodiment uses a pure hardware circuit to implement the strobe light anti-flicker control protection measure. Compared to using a microcontroller to lock the strobe frequency through a program, it uses fewer components, simplifies the circuit, and reduces product material costs and the complexity of research and development and production.

Description

Technical Field

[0001] This utility model relates to the field of strobe light technology, and in particular to a strobe light control circuit and a strobe light circuit. Background Technology

[0002] A strobe light is a light source that generates intense flashing light through a high-voltage instantaneous discharge. It is widely used in traffic warnings, photographic lighting, and emergency lighting. These devices typically control the strobe effect by driving a discharge circuit with a strobe control signal. To obtain the desired light intensity and flashing frequency, the response time of the strobe control signal and the interval between adjacent strobe flashes must be strictly controlled.

[0003] In related technologies, common strobe control circuits often employ a simple trigger-driven method, directly triggering discharge when the strobe control signal switches from low to high. However, in high-frequency strobe scenarios, this direct-drive method has significant drawbacks: On the one hand, continuous triggering can easily cause the discharge circuit to not be fully reset, thus leading to repeated triggering or strobe phenomena; on the other hand, the strobe control signal has jitter when switching between rising and falling edges, which can easily lead to misjudgment of the control logic, resulting in undesirable flashing or output delay.

[0004] Therefore, the strobe light control performance in related technologies is poor.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] In view of the problems in the prior art, the purpose of this utility model is to provide a strobe light control circuit and a strobe light circuit, which overcomes the difficulties of the prior art and can solve the technical problem of poor control performance of existing strobe lights.

[0007] This disclosure provides a strobe light control circuit, which includes: The signal input terminal is used to input the strobe control input signal. The strobe control input signal corresponds to non-strobe control in the first level state and to strobe trigger control in the second level state. The first level state is high or low relative to the second level state. The delay control module includes a discharge branch and a charging branch. It is used to receive the strobe control input signal, and discharge the energy storage capacitor through the discharge branch when the strobe control input signal switches from the first level state to the second level state; and charge the energy storage capacitor through the charging branch when the strobe control input signal switches from the second level state to the first level state; and output a first voltage signal corresponding to the capacitor voltage. The voltage comparison module is used to receive a first voltage signal and a reference voltage signal, compare the level relationship between the first voltage signal and the reference voltage signal, and output a comparison voltage signal; The logic control module is used to receive the strobe control input signal and the comparison voltage signal, and generate the strobe control output signal through OR and NOT logic operations; When the strobe control input signal switches from the first level state to the second level state, the logic control module outputs a strobe control output signal that triggers the strobe. When the strobe control input signal switches from the second level state to the first level state, the delay control module maintains the comparison voltage signal at the first level state through the first voltage signal formed by charging, so that the strobe control output signal maintains the second level state, thereby limiting the minimum trigger interval between two adjacent strobe events.

[0008] Optionally, the discharge branch includes a first resistor coupled between the signal input terminal and the first node; The charging branch includes a second resistor coupled between the first node and the power supply terminal; The energy storage capacitor is coupled between the first node and the ground terminal; The first node is coupled to the first input terminal of the voltage comparator module and is used to output a first voltage signal to the voltage comparator module.

[0009] Optionally, the discharge branch also includes a diode coupled between the first resistor and the first node, with the cathode of the diode connected to the first resistor and the anode connected to the first node.

[0010] Optionally, the strobe light control circuit also includes: The voltage divider reference module is connected to the power supply terminal and is used to divide the power supply voltage at the power supply terminal and output a reference voltage signal.

[0011] Optionally, the voltage divider reference module includes: The third resistor is coupled between the power supply terminal and the second node. The second node is coupled to the second input terminal of the voltage comparator module and is used to output a reference voltage signal to the voltage comparator module.

[0012] Optionally, the voltage divider reference module also includes: The fourth resistor is coupled between the second node and the ground terminal.

[0013] Optionally, the resistance values ​​of the third and fourth resistors are both in the range of 10K to 100K.

[0014] Optionally, the voltage comparison module includes a comparator and a pull-up resistor; The inverting input of the comparator receives the first voltage signal, the non-inverting input of the comparator receives the reference voltage signal, the positive power supply terminal of the comparator is connected to the power supply terminal through the third node, and the output of the comparator outputs the comparison voltage signal through the fourth node. The pull-up resistor is coupled between the third node and the fourth node.

[0015] Optionally, the logic control module includes a NOR gate, the first input of which is connected to the output of the voltage comparison module for inputting a comparison voltage signal, the second input of which is connected to the signal input for inputting a strobe control input signal, and the output of which is used to output a strobe control output signal.

[0016] The second aspect of this disclosure provides a strobe light circuit, which includes a strobe light control circuit and a strobe light according to any of the above embodiments, wherein the strobe light is used to receive a strobe control output signal.

[0017] The strobe light control circuit and strobe light circuit provided in this disclosure have the following beneficial effects: When the strobe control input signal switches from the first level state to the second level state, the logic control module outputs a strobe control output signal to trigger the strobe. When the strobe control input signal switches from the second level state to the first level state, the delay control module maintains the comparison voltage signal at the first level state through a first voltage signal formed by charging, thus keeping the strobe control output signal at the second level state and limiting the minimum trigger interval between two adjacent strobe flashes. During the process of the strobe control input signal returning from the strobe trigger state to the non-trigger state, the delay control module maintains the output delay through the charging process of the energy storage capacitor, preventing two adjacent strobe triggers from being too close. The delay control module and the logic control module work together to realize the delay limitation and timing adjustment of the strobe control output signal, improving the reliability and consistency of strobe light control.

[0018] The present invention employs a pure hardware circuit to implement a protection measure for anti-flicker control of strobe lights. Compared with the method of using a microcontroller to lock the strobe frequency through a program, it uses fewer components, simplifies the circuit, and reduces product material costs as well as the complexity of research and development and production.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0021] Figure 1 This diagram illustrates the architecture of a strobe light control circuit according to an embodiment of the present disclosure.

[0022] Figure 2 exhibit Figure 1 The circuit topology diagram of the strobe light control circuit is shown. Detailed Implementation

[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0024] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0025] Furthermore, the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to define the order of functions performed by these devices, modules or units or their interdependencies.

[0026] In related technologies, attempts have been made to introduce simple RC delay networks for signal debouncing or delay control. However, most of these networks only achieve unidirectional delay and cannot simultaneously manage the timing of the charging (strobe preparation) and discharging (strobe trigger) processes, resulting in unstable output logic and uncertain response delay.

[0027] This disclosure provides an anti-flicker circuit scheme that can achieve delay comparison and logic output control through node voltage changes, so as to have stable timing adjustment capability during both flash triggering and charging processes, thereby preventing flickering and improving the reliability and control accuracy of the flash lamp.

[0028] Figure 1 The diagram illustrates the architecture of a strobe light control circuit provided in this embodiment. The strobe light control circuit may include a signal input terminal 11, a delay control module 12, a voltage comparison module 13, and a logic control module 14.

[0029] Signal input terminal 11 is used to receive the strobe control input signal TRG_CRL_IN. This strobe control input signal TRG_CRL_IN corresponds to non-strobe control in the first level state and to strobe trigger control in the second level state. The first level state is either high or low relative to the second level state; for example, the first level state is high compared to the second level state, while the second level state is low.

[0030] In this embodiment, the signal input terminal 11 is used to be electrically connected to the output terminal of an external control unit to receive the strobe control input signal TRG_CRL_IN.

[0031] In this embodiment, the delay control module 12 includes a discharge branch 12a and a charging branch 12b, which are used to receive the strobe control input signal TRG_CRL_IN, and discharge the energy storage capacitor C1 via the discharge branch 12a when the strobe control input signal TRG_CRL_IN switches from the first level state to the second level state; and charge the energy storage capacitor C1 via the charging branch 12b when the strobe control input signal TRG_CRL_IN switches from the second level state to the first level state.

[0032] The delay control module 12 outputs a first voltage signal corresponding to the voltage of the energy storage capacitor C1 based on the voltage change of the energy storage capacitor C1. This first voltage signal reflects the level change process of the strobe control input signal TRG_CRL_IN between the previous strobe cycle and the current strobe cycle, and serves as the output signal of the delay control module 12 for use by the subsequent voltage comparison module 13.

[0033] The voltage comparison module 13 is used to receive a first voltage signal and a reference voltage signal, compare their level relationship, and output a comparison voltage signal. For example, when the level of the first voltage signal is higher than that of the reference voltage signal, the voltage comparison module outputs a comparison voltage signal at a first level; when the level of the first voltage signal is lower than that of the reference voltage signal, it outputs a comparison voltage signal at a second level.

[0034] The logic control module 14 is used to receive the strobe control input signal TRG_CRL_IN and the comparison voltage signal, and perform a OR-NOT logic operation on the two to generate the strobe control output signal TRG_CRL_OUT.

[0035] Specifically, when the strobe control input signal TRG_CRL_IN switches from the first level state to the second level state, the logic control module 14 outputs a strobe control output signal TRG_CRL_OUT that triggers the strobe. When the strobe control input signal TRG_CRL_IN switches from the second level state to the first level state, the delay control module 14 maintains the comparison voltage signal at the first level state through the first voltage signal formed by charging, so that the strobe control output signal TRG_CRL_OUT maintains the second level state, thereby limiting the minimum trigger interval between two adjacent strobe events.

[0036] In this embodiment, during the process of the input signal recovering from the strobe trigger state to the non-trigger state, the delay control module 13 maintains the output delay through the charging process of the energy storage capacitor C1, preventing two adjacent strobe triggers from being too close together. The delay control module 13 works in conjunction with the logic control module 14 to limit the delay and adjust the timing of the strobe control output signal TRG_CRL_OUT, thereby improving the reliability and consistency of strobe light control.

[0037] The present invention employs a pure hardware circuit to implement a protection measure for anti-flicker control of strobe lights. Compared with the method of using a microcontroller to lock the strobe frequency through a program, it uses fewer components, simplifies the circuit, and reduces product material costs as well as the complexity of research and development and production.

[0038] Figure 2 exhibit Figure 1 The schematic diagram of the topology of the strobe light control circuit is shown below. Figure 2 As shown, the discharge branch 12a includes a first resistor R1 coupled between the signal input terminal 11 and the first node N1, which is used to provide a discharge path for the energy storage capacitor C1 when the strobe control input signal TRG_CRL_IN switches from the first level state to the second level state. The charging branch 12b includes a second resistor R2 coupled between the first node N1 and the power supply terminal VCC, which is used to provide a charging path for the energy storage capacitor C1 when the strobe control input signal TRG_CRL_IN switches from the second level state to the first level state.

[0039] The energy storage capacitor C1 is coupled between the first node N1 and the ground terminal GND. It is used to release charge when the discharge branch 12a is turned on and to accumulate charge when the charging branch 12b is turned on, thereby forming a first voltage signal Va corresponding to the voltage across its terminals.

[0040] The first node N1 is electrically connected to the first input terminal IN1 of the voltage comparison module 13, and is used to output the first voltage signal Va to the voltage comparison module 13.

[0041] Through the above connection, the delay control module 12 can realize the charging and discharging control of the energy storage capacitor C1 according to the output state of the signal input terminal 11, so that the first voltage signal Va received by the voltage comparison module 13 reflects the dynamic change process of the flash control input signal TRG_CRL_IN, thereby providing a voltage delay reference for the subsequent logic control.

[0042] In one embodiment, the discharge branch 12a may further include a diode D1 to enhance the unidirectional conduction characteristics of the discharge process.

[0043] Specifically, discharge branch 12a includes: The first resistor R1 is coupled between the signal input terminal 11 and the negative terminal of diode D1; The conduction path is coupled between the positive terminal of diode D1 and the first node N1, with the negative terminal of diode D1 connected to the first resistor R1 and the positive terminal connected to the first node N1.

[0044] When the strobe control input signal TRG_CRL_IN switches from the first level state to the second level state, diode D1 is forward-biased, causing energy storage capacitor C1 to discharge rapidly through discharge branch 12a. When the strobe control input signal TRG_CRL_IN is in the first level state, diode D1 is in the reverse cutoff state, blocking the charging of energy storage capacitor C1 through the first resistor R1, thereby preventing the discharge branch 12a from interfering with the delay process in the non-strobe trigger state.

[0045] Through the above settings, the delay control module 12 achieves electrical isolation and unidirectional conduction control between the charging and discharging sequences, further improving the stability and anti-flicker performance of the strobe light control circuit in high-frequency triggering scenarios.

[0046] In this disclosure, such as Figure 2 As shown, the strobe light control circuit also includes a voltage divider reference module 15, which is connected to the power supply terminal VCC and is used to divide the power supply voltage of the power supply terminal VCC to output a reference voltage signal Vb. By forming a stable voltage divider network between the power supply terminal VCC and the ground terminal GND, a constant reference voltage signal Vb can be provided to the voltage comparison module 13 as a reference potential, thereby improving the comparison stability and response accuracy during the strobe control triggering process.

[0047] Optionally, the voltage divider reference module 15 includes a third resistor R3, which is coupled between the power supply terminal VCC and the second node N2. The second node N2 is coupled to the second input terminal IN2 of the voltage comparator module 13, and is used to output a reference voltage signal Vb to the voltage comparator module 13.

[0048] The above structure allows the reference voltage to be in a fixed proportional relationship with the power supply voltage, thereby enabling the strobe light control circuit to adaptively adjust the level threshold under different power supply voltages.

[0049] In an optional embodiment, the voltage divider reference module 15 further includes a fourth resistor R4, which is coupled between the second node N2 and the ground terminal GND. The third resistor R3 and the fourth resistor R4 together form a voltage divider resistor network, and the specific magnitude of the reference voltage is set by the ratio of their resistance values. This voltage divider method has a simple structure and high stability, making it suitable for long-term use in strobe control circuits.

[0050] In an optional embodiment, the resistance values ​​of the third resistor R3 and the fourth resistor R4 are both between 10K and 100K. Within this resistance range, the static power consumption can be effectively reduced while ensuring voltage division accuracy, and the excessive current consumption caused by too low a resistance or the voltage division response lag caused by too high a resistance can be avoided. This ensures a stable output of the reference voltage signal and improves the timing reliability of the strobe control output signal.

[0051] In this embodiment of the disclosure, the voltage comparison module 13 in the strobe light control circuit includes a comparator U1 and a pull-up resistor R5. The inverting input terminal of the comparator U1 serves as the first input terminal IN1 of the voltage comparison module 13, used to receive the first voltage signal Va output from the delay control module 12, and used to reflect the voltage change across the energy storage capacitor C1 in real time; the non-inverting input terminal of the comparator U1 serves as the second input terminal IN2, used to receive the reference voltage signal Vb provided by the voltage divider reference module 15, and used to establish a level comparison reference.

[0052] The positive power supply terminal V+ of comparator U1 is connected to the power supply terminal VCC through the third node N3 to provide operating voltage for comparator U1; the output terminal OUT of comparator U1 outputs the comparison voltage signal Vc through the fourth node N4. The comparison voltage signal Vc is used to characterize the level relationship between the first voltage signal Va and the reference voltage signal Vb.

[0053] In an optional embodiment, pull-up resistor R5 is coupled between the third node N3 and the fourth node N4 to stabilize the output level by pulling up when the output terminal OUT of comparator U1 is in an open-drain or open-collector output structure.

[0054] The above structure enables precise comparison and digital output of the charging and discharging state of the energy storage capacitor C1, thereby ensuring that the input signal of the subsequent logic control module 14 has a clear high and low level state, and improving the accuracy and response speed of the strobe control signal switching.

[0055] In this embodiment of the disclosure, the logic control module 14 in the strobe light control circuit includes a NOR gate U2. The first input terminal IN3 of the NOR gate U2 is connected to the output terminal OUT of the voltage comparison module 13 and is used to input the comparison voltage signal Vc. The second input terminal IN4 of the NOR gate U2 is connected to the signal input terminal 11 and is used to input the strobe control input signal TRG_CRL_IN.

[0056] Among them, the output terminal OUT1 of the NOR gate U2 is used to output the strobe control output signal TRG_CRL_OUT, which serves as the direct trigger signal to drive the strobe light to turn on or off.

[0057] With the above structure, when the strobe control input signal TRG_CRL_IN switches from the first level state to the second level state, the logic control module 14 performs a OR NOT logic operation on the comparison voltage signal Vc and the strobe control input signal TRG_CRL_IN, and outputs the strobe control output signal TRG_CRL_OUT that triggers strobe.

[0058] When the strobe control input signal TRG_CRL_IN returns to the first level, the comparison voltage signal Vc output by comparator U1 remains at a high level under the charging maintenance of delay control module 12, so that the strobe control output signal TRG_CRL_OUT output by NOR gate U2 remains at the second level, thereby limiting the minimum trigger interval between two adjacent strobes, ensuring stable strobe effect and avoiding false triggering.

[0059] The following explanation uses the first level state as high and the second level state as low. Figure 2 The working principle of the strobe light control circuit shown.

[0060] When the system is powered on, the power supply terminal VCC provides the power supply voltage, which, through resistors R3 and R4, forms the reference voltage signal Vb at the second node N2. This reference voltage is then input to the non-inverting input (second input IN2) of comparator U1. The resistance values ​​of R3 and R4 are preferably in the range of 10kΩ to 100kΩ, and the specific voltage division values ​​can be adjusted according to the driving voltage level of the strobe light.

[0061] The inverting input (i.e., the first input IN1) of comparator U1 is connected to the charging branch 12b, which consists of R2 and C1, to form the charging time constant for anti-flicker control. Since the anti-flicker time requirement is in the hundreds of milliseconds range, the resistance of R2 is set to the megaohm range, and the capacitance of C1 can be set to the tens of nanofarads range, thus allowing R2 to... The charging time constant of C1 is in the range of hundreds of milliseconds. R1 is connected in parallel with C1 to form a discharge branch. The value of R1 is in the range of thousands of ohms, so as to achieve a discharge time constant in the range of hundreds of microseconds, thereby limiting the duration of a single flash.

[0062] D1 is connected in series between R1 and the first node N1 to prevent C1 from being charged through R1 when TRG_CRL_IN is high, thus ensuring that C1 is not disturbed during the high-level period. D1 is turned on when TRG_CRL_IN is low and turned off when TRG_CRL_IN is high.

[0063] When the external camera does not output the strobe control input signal TRG_CRL_IN, TRG_CRL_IN is high, and diode D1 is cut off. At this time, C1 is fully charged through R2, and the voltage at the first node N1 is close to VCC level, higher than the reference voltage signal Vb at the non-inverting input (second input IN2). The comparator U1 outputs a low level at its output OUT. This low level is then processed by the NOR gate U2 with the high-level TRG_CRL_IN signal, resulting in TRG_CRL_OUT being low, corresponding to the normal non-strobe state.

[0064] When the external camera outputs the strobe control output signal TRG_CRL_OUT, TRG_CRL_IN transitions from high to low, diode D1 conducts, and R1 discharges through C1. Due to the small discharge time constant, the voltage (first voltage signal Va) at the inverting input terminal of U1 (i.e., the first input terminal IN1) remains higher than the reference voltage (reference voltage signal Vb), and the output terminal of U1 remains low. At this time, TRG_CRL_IN is low. After passing through the NOR logic of U2, the output pin of U2 (TRG_CRL_OUT) goes high, thereby driving the strobe light to illuminate.

[0065] As the discharge proceeds, after a preset time t1, the first voltage signal Va of the first node N1 drops below Vb, and the level of the output terminal OUT of U1 flips to a high level. After the logic judgment of U2, TRG_CRL_OUT becomes a low level, and the strobe control ends. The values ​​of R1 and C1 are selected to ensure that while TRG_CRL_IN remains at a low level, the voltage of C1 can fully discharge to near the forward voltage drop Vf of D1, so as to ensure that the strobe pulse width is precisely controlled.

[0066] After the flash ends, TRG_CRL_IN returns from low to high, diode D1 is cut off, and R2 recharges C1. At this time, the Va voltage rises exponentially, satisfying the following relationship:

[0067] Where Va(t) = Vb.

[0068] When Va(t) rises to equal Vb, the OUT state of U1 output reverses again. That is, after TRG_CRL_IN returns to a high level, the U1 output remains at a high level for a duration t, keeping TRG_CRL_OUT at a low level. During this time, strobe is prevented from being triggered again, thus forming anti-flicker protection with a minimum interval time t.

[0069] Optionally, by adjusting the parameters of R2 and C1, the minimum interval time t between two flashes can be flexibly set to achieve anti-flicker control in different application scenarios. For comparator U1 with an open-drain structure at output OUT1, its output 143 is connected to VCC through pull-up resistor R5 to provide high-level output capability and ensure that the logic signal is stably transmitted to the NOR gate U2.

[0070] In summary, through the synergistic effect of comparator U1, resistors and capacitors, and logic gates, this embodiment can achieve debouncing and anti-flicker control of the strobe control signal without the need for an additional microcontroller. It has a simple structure, fast response, and strong anti-interference capability.

[0071] This disclosure also provides a strobe light circuit, which includes a strobe light control circuit and a strobe light according to any of the above embodiments. The strobe light is used to receive the strobe control output signal and to control whether to turn on or off according to the level of the signal.

[0072] For example, combining Figure 2 As shown, when the strobe control output signal TRG_CRL_OUT output by the logic control module 14 is high, the strobe lamp receives a conduction signal, thereby driving the internal lighting circuit or xenon lamp tube to conduct and realize strobe lighting; when the strobe control output signal TRG_CRL_OUT is low, the strobe lamp is in the off state and does not produce a flash.

[0073] In one embodiment, the strobe light may be a xenon strobe light, an LED strobe light, or other light source modules with fast response characteristics.

[0074] Optionally, when the strobe lamp is a xenon lamp, its input terminal is connected to the drive pin via a driver module, and the strobe control output signal TRG_CRL_OUT is input to the driver module as a drive control signal. Since a high level of the strobe control output signal TRG_CRL_OUT corresponds to the lamp being turned on and a low level corresponds to the lamp being turned off, the strobe duration can be accurately limited under the cooperation of the logic control module 14 and the voltage comparison module 13, and an adjustable interval period can be formed between two strobes, thereby effectively avoiding high-frequency flickering.

[0075] Optionally, after power-on, the strobe control circuit automatically performs comparison, delay, and logic output operations based on the changes in the strobe control input signal TRG_CRL_IN. When the current-stage camera outputs no strobe control signal (high level), the strobe control output signal TRG_CRL_OUT remains low, and the strobe light is not turned on. When the camera outputs the strobe control input signal TRG_CRL_IN at a low level, the logic control module 14 outputs a high-level strobe control output signal TRG_CRL_OUT, illuminating the strobe light. Due to the delay effect of the internal voltage comparison module 13, it automatically returns to a low-level state after a single flash and prevents the strobe from being triggered again within a set time interval, thereby achieving the anti-flicker control function under purely hardware conditions.

[0076] Therefore, this implementation method establishes a direct signal interface connection between the strobe light and the strobe light control circuit, enabling precise matching between the strobe light's lighting sequence and the circuit's comparison and delay logic. This eliminates the need for additional software delay or control units, resulting in a simplified structure, fast response speed, and significantly improved anti-flicker stability and system reliability of the strobe light.

[0077] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A strobe light control circuit, characterized in that, include: The signal input terminal is used to input a strobe control input signal. The strobe control input signal corresponds to non-strobe control in the first level state and to strobe trigger control in the second level state. The first level state is high or low relative to the second level state. The delay control module includes a discharge branch and a charging branch, which is used to receive the strobe control input signal and discharge the energy storage capacitor via the discharge branch when the strobe control input signal switches from the first level state to the second level state. When the strobe control input signal switches from the second level state to the first level state, the energy storage capacitor is charged via the charging branch; and a first voltage signal corresponding to the capacitor voltage is output. A voltage comparison module is used to receive the first voltage signal and the reference voltage signal, compare the level relationship between the first voltage signal and the reference voltage signal, and output a comparison voltage signal; The logic control module is used to receive the strobe control input signal and the comparison voltage signal, and generate a strobe control output signal by performing a NOT logic operation. When the strobe control input signal switches from the first level state to the second level state, the logic control module outputs a strobe control output signal that triggers the strobe. When the strobe control input signal switches from the second level state to the first level state, the delay control module maintains the comparison voltage signal at the first level state through the first voltage signal formed by charging, so that the strobe control output signal maintains the second level state, thereby limiting the minimum trigger interval between two adjacent strobe events.

2. The strobe light control circuit according to claim 1, characterized in that, The discharge branch includes a first resistor coupled between the signal input terminal and the first node; The charging branch includes a second resistor coupled between the first node and the power supply terminal; The energy storage capacitor is coupled between the first node and the ground terminal; The first node is coupled to the first input terminal of the voltage comparison module and is used to output the first voltage signal to the voltage comparison module.

3. The strobe light control circuit according to claim 2, characterized in that, The discharge branch also includes a diode coupled between the first resistor and the first node, wherein the negative terminal of the diode is connected to the first resistor and the positive terminal is connected to the first node.

4. The strobe light control circuit according to claim 1, characterized in that, Also includes: The voltage divider reference module is connected to the power supply terminal and is used to divide the power supply voltage at the power supply terminal and output the reference voltage signal.

5. The strobe light control circuit according to claim 4, characterized in that, The voltage divider reference module includes: A third resistor is coupled between the power supply terminal and the second node, and the second node is coupled to the second input terminal of the voltage comparison module for outputting the reference voltage signal to the voltage comparison module.

6. The strobe light control circuit according to claim 5, characterized in that, The voltage divider reference module also includes: The fourth resistor is coupled between the second node and the ground terminal.

7. The strobe light control circuit according to claim 6, characterized in that, The resistance values ​​of the third and fourth resistors are both between 10K and 100K.

8. The strobe light control circuit according to claim 1, characterized in that, The voltage comparison module includes a comparator and a pull-up resistor; The inverting input of the comparator receives the first voltage signal, the non-inverting input of the comparator receives the reference voltage signal, the positive power supply terminal of the comparator is connected to the power supply terminal through the third node, and the output of the comparator outputs the comparison voltage signal through the fourth node. The pull-up resistor is coupled between the third node and the fourth node.

9. The strobe light control circuit according to claim 1, characterized in that, The logic control module includes a NOR gate. The first input terminal of the NOR gate is connected to the output terminal of the voltage comparison module to input the comparison voltage signal. The second input terminal of the NOR gate is connected to the signal input terminal to input the strobe control input signal. The output terminal of the NOR gate is used to output the strobe control output signal.

10. A strobe light circuit, characterized in that, The invention includes a strobe light control circuit and a strobe light as described in any one of claims 1 to 9, wherein the strobe light is used to receive the strobe control output signal.

Images