High speed LED lighting device and applications

Abstract

The application provides a high-speed LED lighting device and application, and relates to the field of high-speed imaging lighting. A wide-voltage high-voltage power supply module distributes output power supply to multiple groups of LED light source modules through multiple levels of parallel bus lines; each group of LED light source modules is independently configured with a high-speed high-voltage large-current semiconductor switch unit connected in series in an LED current loop; the two poles of the LED light source module are always loaded with constant high voltage during standby, trigger interval and non-lighting period; when a trigger signal is sent by a high-speed trigger and timing control module, the gate of the high-speed high-voltage large-current semiconductor switch unit is instantaneously opened by high-speed driving, high voltage pre-charged at the two poles of the LED light source module instantaneously establishes a large loop current to make the LED light source module emit light; when the high-speed high-voltage large-current semiconductor switch unit is turned off, the current is cut off, the LED light source module is extinguished, but the high voltage at the two poles remains unchanged. The application is suitable for high-speed imaging, PIV, BOS and industrial stroboscopic scenes.

Description

Technical Field

[0001] This invention relates to the field of high-speed imaging lighting, and more particularly to a high-speed LED lighting device and its application. Background Technology

[0002] A 905nm narrow-pulse high-power semiconductor laser array for high-speed imaging only supports near-infrared imaging and is unsuitable for mainstream experiments such as visible light high-speed photography, PIV particle imaging, BOS schlieren flow field analysis, and industrial visible light stroboscopic imaging. Furthermore, most ordinary optical cameras and flow field testing systems are visible light sensors, requiring additional infrared cameras / filters, significantly increasing equipment costs. In addition, this solution relies on a fixed 200nF capacitor to store energy, triggering discharge only once. After discharge, the capacitor requires a long recharging time, making high-frequency continuous stroboscopic imaging impossible. Moreover, this solution, limited to a fixed capacitor to 200ns, cannot achieve stepless adjustment at the software or hardware level, and is incompatible with high-speed cameras offering different exposure times in the 5ns~ms range.

[0003] Furthermore, Chinese invention patent CN114599132A discloses "an imaging illumination source driving pulse generation device and a photographic illumination device." This solution has the following drawbacks: 1. LEDs lack pre-stored high voltage in standby mode, resulting in slow pulse response, gentle rise time, and large synchronization jitter. The high-voltage power supply only powers the pulse current source drive circuit, and the LED only has a loaded voltage at the moment of pulse triggering and conduction; there is no continuous high voltage across the LED during standby and the interval between two flashes. Each time it is triggered, the drive circuit needs to rebuild the voltage and establish the loop current, resulting in a significant voltage build-up delay, a flat pulse rise edge, poor trigger synchronization consistency, and large jitter, which cannot meet the requirements of nanosecond-level high-precision synchronous high-speed imaging.

[0004] 2. A single power supply drives only a single LED array, and expanding to multiple light sources is costly and timing is difficult to unify: The entire driver circuit is only matched with one LED light source array, and there is no multi-path parallel power supply architecture. If multi-field and multi-array synchronous lighting is required, multiple independent driver power supplies must be equipped, the triggering sequence of each path cannot be strictly synchronized, the wiring is cumbersome, and the hardware cost increases exponentially.

[0005] 3. The light source and driver are integrated into one unit, resulting in poor heat dissipation and inconvenient disassembly and maintenance: The driving circuit is integrated with the LED light source array, and the heat dissipation space is limited under high-power pulse operation; the light source module cannot be replaced separately, and on-site debugging and maintenance are complicated.

[0006] 4. Fewer optical path homogenization levels: The optical path only uses a single homogenization structure of condenser lens + single aperture + single Fresnel lens. With few homogenization levels, the light intensity at the edge of the large field of view illumination is significantly reduced, and the uniformity of the light spot is limited. It can only meet the requirements of qualitative detonation imaging and cannot be adapted to PIV and BOS quantitative high-precision flow field imaging. Summary of the Invention

[0007] Purpose of the invention: To propose a high-speed LED lighting device and its application, which achieves high voltage across both ends of the LED throughout the process, and realizes instantaneous high current and high peak power output through instantaneous switching of high-speed, high-voltage, high-current semiconductor switching devices.

[0008] This invention proposes a high-speed LED lighting device, comprising: a wide-voltage, high-voltage power supply module, a multi-level parallel distribution unit, multiple LED light source modules, multiple high-speed, high-voltage, high-current semiconductor switching units, a high-speed triggering and timing control module, and a protection module; wherein: The wide-voltage, high-voltage power supply module distributes power to the multiple groups of LED light source modules through the multi-level parallel busbar of the multi-level parallel distribution unit. Each group of LED light source modules is independently equipped with a high-speed, high-voltage, high-current semiconductor switching unit, which is connected in series in the LED current loop. The two poles of the LED light source module are always loaded with a constant high voltage during standby, trigger interval, and non-light-emitting periods. When the high-speed trigger and timing control module sends a trigger signal, the gate of the high-speed, high-voltage, high-current semiconductor switching unit is driven to turn on instantaneously at high speed, and the high voltage pre-charged across the LED light source module instantly establishes a large loop current to make it emit light. When the high-speed, high-voltage, high-current semiconductor switching unit is turned off, the current is cut off, the LED light source module is extinguished, but the high voltage across its two poles remains unchanged. The protection module is used for monitoring device operating parameters and overload safety protection.

[0009] As a preferred embodiment, the wide-voltage high-voltage power supply module provides a main power high voltage of 0~75V DC as the LED light source. Its high-voltage bus positive terminal is directly connected to the anode of the LED chip in the LED light source module, and its high-voltage bus negative terminal is connected to the cathode of the LED chip via the high-speed high-voltage high-current semiconductor switching unit.

[0010] As a preferred embodiment, a capacitor is connected in parallel on the high-voltage input side of the wide-voltage high-voltage power supply module; at the instant the high-speed high-voltage high-current semiconductor switching unit is turned on, the capacitor discharges instantaneously to replenish the instantaneous peak current; during the turn-off gap of the high-speed high-voltage high-current semiconductor switching unit, the wide-voltage high-voltage power supply module replenishes the capacitor with energy and absorbs switching noise to suppress high-voltage bus ripple.

[0011] As a preferred embodiment, the high-speed triggering and timing control module receives a PWM modulation signal input from an external master controller; the PWM modulation signal first enters the optocoupler isolation stage of the PWM drive amplification module, and the electrical connection is broken through optocoupler; the weak level output by the optocoupler is amplified by the internal drive chip to generate a gate control signal, which synchronously drives the gate of the high-speed, high-voltage, high-current semiconductor switching unit.

[0012] As a preferred embodiment, the high-speed, high-voltage, high-current semiconductor switching unit uses one or more MOS transistors connected in parallel.

[0013] As a preferred embodiment, the high-speed, high-voltage, high-current semiconductor switching unit uses one or more IGBTs connected in parallel.

[0014] As a preferred embodiment, the duty cycle of the PWM modulation signal is used to control the pulse width of the LED light emission.

[0015] As a preferred embodiment, the protection module incorporates an automatic interlocking protection mechanism for the driving voltage, based on the energy formula of a single pulse injected into the LED. A discharge protection curve is constructed, where Q is the energy injected into the LED in a single pulse, U is the forward voltage, T is the pulse duration, and R is the equivalent internal resistance. The protection module automatically calculates and limits the maximum allowable overload drive voltage based on the set light emission duration.

[0016] As a preferred embodiment, the protection module is configured using the formula... Calculate the maximum allowable pulse duration at a predetermined voltage. ,in The maximum single-passable energy is determined; when the input voltage, pulse width, and frequency parameters exceed the voltage-pulse width protection curve range, the software closed-loop control automatically interlocks or dynamically adjusts to limit the maximum allowable pulse width or reduce the drive voltage.

[0017] As a preferred embodiment, the multiple LED light source modules adopt an adjustable 3-piece combined lens design to achieve high uniformity BOS illumination. The structural layout according to the optical path is as follows: mirror light source, first lens, second lens, third lens and fourth lens.

[0018] As a preferred embodiment, the first lens, the second lens, and the third lens have the same aperture and focal length, which is used to achieve three-level progressive homogenization and convert the divergent light source into a parallel reference beam. The distance between the fourth lens and the third lens is adjustable.

[0019] As a preferred option, the high-speed LED lighting device disclosed above can be applied to high-speed imaging, PIV, BOS, and industrial strobe scenarios.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects: (1) The LED adopts a constant high voltage architecture with full pre-charging. The positive terminal of the 0~75V high voltage bus of the wide voltage power supply module is directly connected to the LED anode. The LED ends always maintain a complete high voltage during standby and triggering intervals. The current is controlled by switching on and off using a high-speed semiconductor switch. There is no need to re-boost the voltage during triggering. A large current is generated instantaneously at the nanosecond level. The pulse rise edge is steep and the trigger jitter is ≤1ns, which greatly improves the synchronization accuracy. The thin film capacitor outputs a peak current instantaneously at the moment of conduction. During the turn-off interval, the power supply continuously charges the capacitor. There is no charging wait, which is suitable for continuous dynamic process observation.

[0021] (2) Adopting a multi-level parallel bus centralized power supply architecture and setting up multi-level parallel distribution units, a single high-voltage power supply can simultaneously drive 8 to 10 independent LED light source modules. Multiple light sources share the same high-voltage bus, naturally ensuring that the timing of each path is completely synchronized, simplifying wiring and reducing the cost of multi-light source systems.

[0022] (3) The power supply and light source are designed separately, with the control drive power supply and LED light source module being independent of each other, and the light source module has sufficient heat dissipation space.

[0023] (4) The three-stage beam homogenization path is achieved by using four adjustable lenses. Three lenses with the same aperture and focal length complete the three-stage beam homogenization, filter out stray light, and convert the divergent light source into a parallel reference beam. The spacing of the end beam expander lenses is adjustable, which can flexibly adjust the size of the output field of view. The uniformity of light intensity in the entire field of view is significantly improved, which meets the high-precision imaging requirements of quantitative optical flow field measurement.

[0024] (5) It adopts a visible light source and the wavelength can be adjusted by replacing the LED, making it suitable for all visible light high-speed imaging, PIV, BOS, and industrial strobe scenarios, with strong versatility.

[0025] (6) The pulse width covers the entire range of 100ns to 1ms, and the PWM duty cycle can be continuously and steplessly adjusted. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a high-speed LED lighting device.

[0027] Figure 2 This is a circuit design diagram for a wide-voltage, high-voltage power supply module (LED driver module control board).

[0028] Figure 3 This is a schematic diagram of the optical structure of each LED light source module.

[0029] Figure 4 This is a schematic diagram of the optical path of an LED light source module. Detailed Implementation

[0030] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0031] This invention provides a high-speed LED lighting device. The overall architecture of this device is constructed from several core components, including a wide-voltage, high-voltage power supply module, a multi-level parallel distribution unit, multiple LED light source modules, multiple high-speed, high-voltage, high-current semiconductor switching units, a high-speed triggering and timing control module, and a protection module. A schematic diagram is shown below. Figure 1 During the operation of this device, the externally input 220V AC power is first rectified and filtered to convert it into stable and smooth DC power. This DC power is then fed into a wide-voltage isolated high-voltage power supply module. This wide-voltage high-voltage power supply module, acting as a high-precision high-voltage regulator, can stably output a constant high-voltage DC power that is continuously adjustable from 0 to 75V. Furthermore, due to its electrical isolation function, it exhibits extremely strong safety and anti-interference capabilities. Next, the constant high voltage output from this module is distributed simultaneously to each of the multiple independent LED light source modules via a dedicated power supply line and a multi-stage parallel bus of a multi-stage parallel distribution unit. In the core logic of the overall design, each LED light source module is independently equipped with a high-speed, high-voltage, high-current semiconductor switching unit, and this semiconductor switching unit is connected in series in the corresponding LED current loop. The terminals of these LED light source modules are always maintained by a constant high-voltage structure provided by the power supply module during standby, trigger intervals, and any non-light-emitting periods. This means that during the entire non-light-emitting period, the constant high voltage pre-charged across the LED does not discharge, turn off, or drop, keeping the LED in a high-voltage standby state. When the high-speed trigger and timing control module sends a trigger signal, the gate of the high-speed, high-voltage, high-current semiconductor switching unit connected in series in the circuit is instantly driven at high speed and turned on. Since the pre-charged high voltage has already been established and maintained across the LED light source module, the high voltage instantly builds up a massive loop current within nanoseconds, driving the LED chip to generate extremely bright light pulses and emit light. Subsequently, when the high-speed, high-voltage, high-current semiconductor switching unit is turned off, the loop current is immediately cut off, causing the LED light source module to extinguish instantly. After extinguishing, the high voltage across its terminals remains unchanged, continuing to maintain a preset constant high-voltage state, awaiting the next trigger signal. By using an architecture that controls current by switching on and off with ultra-high-speed, ultra-high-power electronic gates, rather than relying on modulated voltage rise and fall, the shortcomings of traditional pulse light sources, such as slow rise time, low peak value, and large synchronization jitter, are perfectly solved.

[0032] The following section details the circuit connection between the wide-voltage, high-voltage power supply module and the LED light source module. In this embodiment, see... Figure 2 This wide-voltage, high-voltage power supply module specifically provides a 0~75V DC main power high voltage, serving not only as the power source for the entire LED illumination but also supporting a constant on-state current of up to 30A. To ensure the stability of this high-voltage pre-stored architecture, the positive terminal of the high-voltage bus of the wide-voltage, high-voltage power supply module is directly connected to the anode of the LED chip in the LED light source module, while the negative terminal of its high-voltage bus needs to be connected to the cathode of the LED chip via a high-speed, high-voltage, high-current semiconductor switching unit. In this way, the positive terminal of the LED is always connected to the high-voltage positive terminal, and a complete, zero-dropout high voltage is pre-applied across the LED when it is not emitting light in standby mode. Furthermore, to reduce the impact of the high-voltage power supply under instantaneous peak loads, a thin-film discharge capacitor is connected in parallel on the high-voltage input side of the wide-voltage, high-voltage power supply module. The thin-film discharge capacitor discharges its pre-stored electrical energy instantaneously when the high-speed, high-voltage, high-current semiconductor switching unit is turned on, thereby replenishing the instantaneous peak current required for LED light emission. During the interval when the switching unit is turned off, the wide-voltage, high-voltage power supply module continuously replenishes and stores energy for the thin-film discharge capacitor. At the same time, it can effectively absorb the noise generated during switching, thereby suppressing ripple on the high-voltage bus and ensuring power supply quality.

[0033] The following section elaborates on the circuitry and timing logic of the control and triggering section. The high-speed triggering and timing control module of this device primarily receives PWM modulation signals input from the external main controller. To ensure the safety of the entire control system, the low-voltage PWM modulation signal input from the external main controller is not grounded with the 75V main power high voltage. After input, the PWM modulation signal first enters the optocoupler isolation stage of the PWM drive amplifier module, completely blocking the electrical connection through optocoupler coupling, thereby preventing high voltage from entering the main controller and burning out the host controller. Subsequently, the low-level signal output from the optocoupler enters the internal driver chip for power amplification, generating a gate control signal that can be used for driving. This signal is used to synchronously drive the gate of the aforementioned high-speed, high-voltage, high-current semiconductor switching unit. To power the chip, optocoupler, and MOSFET drive circuit within the PWM drive amplifier module, the system also has an additional independent power supply providing 12V DC and 0.5A of low voltage. Furthermore, to evenly distribute the load current, reduce the on-resistance of the switch, and significantly improve the instantaneous peak overcurrent capability, the high-speed, high-voltage, high-current semiconductor switching unit in this embodiment adopts a dual MOSFET switching structure, specifically composed of two high-speed MOSFETs connected in parallel. Regarding timing control performance, by adjusting the duty cycle of the input PWM modulation signal, the pulse width of LED illumination can be precisely controlled. The device supports a pulse width range of 100ns to 1ms, and is continuously and precisely adjustable within this wide range, making it perfectly suitable for flow field imaging light sources. In addition, the device supports a maximum repetition rate of 200kHz when externally triggered, and due to the use of TTL isolated triggering, its trigger jitter can be controlled within an extremely high precision range of less than or equal to 1ns, thereby ensuring timing consistency during large-area illumination in multi-lamp systems.

[0034] The crucial intelligent protection module in this device is described in detail below. Because this lighting device operates under extremely high voltage and high current pulse conditions, to prevent LED burnout due to high voltage overload under long pulse widths, the protection module incorporates a built-in automatic interlocking protection mechanism for the drive voltage. This mechanism constructs the safety boundary based on the energy formula injected into the LED with a single pulse, and its energy formula is expressed as follows: Q represents the energy injected into the LED in a single pulse, U represents the forward voltage applied to the LED, T is the current pulse duration, and R represents the equivalent internal resistance of the LED itself. Using this formula, the protection module constructs a scientific discharge protection curve at the software level. The system automatically calculates and limits the maximum allowable overload drive voltage based on the user-defined illumination duration. More specifically, the protection module uses a derived formula... The maximum allowable pulse duration at a specific voltage can be precisely calculated. , here This represents the maximum energy limit that an LED can withstand in a single pulse. Using this formula, the system can determine the maximum flashing time at a specific voltage. For example, when the voltage is 75V, the maximum allowable pulse width will be intelligently limited to approximately 8μs. Once the software detects that the user-input voltage, pulse width, or frequency exceeds the preset voltage-pulse width protection curve range, the system will immediately report an error or automatically interlock and dynamically adjust through software closed-loop control to limit the maximum allowable pulse width or directly reduce the driving voltage. Furthermore, during the dynamic operation of the system, if the actual voltage unexpectedly increases due to external factors such as power fluctuations, the software will immediately initiate dynamic linkage, instantly shortening the current pulse width to ensure that the single-pulse energy is always controlled within a safe range. Secondly, in addition to energy protection for a single pulse, the protection module also has a thermal protection function that simulates long-term operation, used to simulate and control the heat generated during long-term operation. Since the long-term temperature rise of an LED is directly related to the average power per unit time, the system introduces an average power formula. Where I is the current through the LED and D is the pulse duty cycle. The protection module limits the total number of pulses within a certain time period in software, thereby keeping the average power per unit time firmly below a safe threshold. This effectively prevents the LED from overheating, thermal runaway, or severe light decay due to prolonged operation with a high duty cycle. This triple protection mechanism—comprising voltage limiting to prevent overvoltage breakdown, pulse width limiting to prevent burnout from excessive single-pulse energy, and total energy limiting to prevent thermal runaway—enhances the reliability of the system during long-term high-frequency operation.

[0035] This embodiment also optimizes the optical and structural layout of the high-speed LED lighting device. To achieve highly uniform lighting in flow field imaging, multiple LED light source modules employ an adjustable 3-element combined lens design, see [link to relevant documentation]. Figure 3 In terms of the specific spatial structure layout, a mirror light source with an 8mm diameter emitting surface, a first lens, a second lens, a third lens, and a fourth lens are arranged sequentially according to the forward and backward direction of the light path. Here, the first, second, and third lenses, located at the front of the light path, are identical in specifications; they all have an aperture of 25.4mm and a focal length of f45. These three lenses work together to achieve three-stage progressive homogenization of the light emitted from the mirror light source, filtering out unwanted stray light, and successfully converting the originally divergent light source into a collimated parallel reference beam. (See...) Figure 4The fourth lens, located at the very end, has a 30mm aperture and an f / 100 focal length. To allow for fine-tuning of the final output beam shape, the center distance between this fourth lens and the third lens is designed to be flexibly adjustable. In terms of overall industrial and structural design, the device employs a completely separate structure for the LED light source module and the control power supply. This design not only significantly improves the heat dissipation of the light source module but also simplifies installation and maintenance. Under this multi-stage parallel centralized control architecture, a single multi-functional control power supply can simultaneously drive up to 8 to 10 LED light source modules, effectively reducing the wiring complexity and overall cost of multi-lamp systems. Furthermore, to further enhance convenience in industrial settings, the dedicated connection cable between the LED light source module and the control power supply box supports hot-swapping, allowing users to directly replace or adjust the light source module without shutting down the power system.

[0036] The core working principle of this invention is as follows: The entire device is powered by 220V AC power. First, the 220V AC power is rectified and filtered into stable and smooth DC power, which is then sent to a wide-voltage isolated high-voltage power supply module. This module acts like a high-precision "high-voltage stabilizing pump," capable of stably outputting a constant high-voltage DC power that is continuously adjustable from 0 to 72V. It also features electrical isolation, ensuring safety and strong anti-interference capabilities.

[0037] The constant high voltage output is simultaneously delivered to both ends of each LED light source through a dedicated power supply line in a multi-stage parallel configuration. The key design feature is that this high voltage is always steadily applied to both ends of the LED, even when it is not emitting light, in standby mode, or between flashes, without voltage drop, power failure, or discharge, maintaining a high-voltage standby state at all times.

[0038] Each LED has a high-speed, high-voltage, high-current semiconductor switch (similar to an ultra-high-speed, ultra-high-power electronic gate). Normally, the switch is open, there is high voltage across the LED but no current, so it does not emit light. When an external trigger signal arrives, this switch will close instantaneously in nanoseconds (one billionth of a second), and the high voltage will immediately drive an ultra-high current to flow through the LED, causing the LED to emit an extremely bright light pulse. Afterward, the switch will quickly open again, the LED will turn off, and the high voltage across the LED will remain, waiting for the next trigger.

[0039] By controlling the closing time of the switch, the duration of light emission can be precisely controlled, achieving a continuously adjustable pulse from 100 nanoseconds to 1 millisecond. The peak power and brightness at the moment of light emission are extremely high, making it suitable for capturing extremely fast motion.

[0040] To protect the LEDs from burning out, the system has a built-in intelligent voltage-pulse width interlock protection mechanism. It automatically calculates and limits the maximum allowable driving voltage based on the set light emission duration (pulse width): the shorter the light emission time, the higher the allowable instantaneous voltage; the longer the light emission time, the more automatically the system will reduce the maximum voltage to prevent the LEDs from being damaged by prolonged high voltage overload and overheating. The entire process is safe and controllable.

[0041] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. Although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A high-speed LED lighting device, characterized in that, include: Wide-range high-voltage power supply module, multi-level parallel distribution unit, multiple LED light source modules, multiple high-speed high-voltage high-current semiconductor switching units, high-speed triggering and timing control module, and protection module; among which: The wide-voltage, high-voltage power supply module distributes power to the multiple groups of LED light source modules through the multi-level parallel busbar of the multi-level parallel distribution unit. Each group of LED light source modules is independently equipped with a high-speed, high-voltage, high-current semiconductor switching unit, which is connected in series in the LED current loop. The two poles of the LED light source module are always loaded with a constant high voltage during standby, trigger interval, and non-light-emitting periods. When the high-speed trigger and timing control module sends a trigger signal, the gate of the high-speed, high-voltage, high-current semiconductor switching unit is driven to turn on instantaneously at high speed, and the high voltage pre-charged across the LED light source module instantly establishes a large loop current to make it emit light. When the high-speed, high-voltage, high-current semiconductor switching unit is turned off, the current is cut off, the LED light source module is extinguished, but the high voltage across its two poles remains unchanged. The protection module is used for monitoring device operating parameters and overload safety protection.

2. A high-speed LED lighting device according to claim 1, characterized in that, The wide-voltage high-voltage power supply module provides a main power high voltage of 0~75V DC as the LED light source. Its high-voltage bus positive terminal is directly connected to the anode of the LED chip in the LED light source module, and its high-voltage bus negative terminal is connected to the cathode of the LED chip after passing through the high-speed high-voltage high-current semiconductor switching unit.

3. A high-speed LED lighting device according to claim 2, characterized in that, A capacitor is connected in parallel on the high-voltage input side of the wide-voltage high-voltage power supply module; at the instant the high-speed high-voltage high-current semiconductor switching unit is turned on, the capacitor discharges instantaneously to replenish the instantaneous peak current; during the turn-off gap of the high-speed high-voltage high-current semiconductor switching unit, the wide-voltage high-voltage power supply module replenishes the capacitor with energy and absorbs switching noise to suppress high-voltage bus ripple.

4. A high-speed LED lighting device according to claim 1, characterized in that, The high-speed triggering and timing control module receives the PWM modulation signal input from the external master controller; the PWM modulation signal first enters the optocoupler isolation stage of the PWM drive amplification module, and the electrical connection is broken through optocoupler; the weak level output by the optocoupler is amplified by the internal drive chip to generate the gate control signal, which synchronously drives the gate of the high-speed, high-voltage, high-current semiconductor switching unit.

5. A high-speed LED lighting device according to claim 4, characterized in that, The high-speed, high-voltage, high-current semiconductor switching unit uses one or more MOS transistors connected in parallel.

6. A high-speed LED lighting device according to claim 4, characterized in that, The high-speed, high-voltage, high-current semiconductor switching unit uses one or more IGBTs connected in parallel.

7. A high-speed LED lighting device according to claim 4, characterized in that, The duty cycle of the PWM modulation signal is used to control the pulse width of the LED light emission.

8. A high-speed LED lighting device according to claim 1, characterized in that, The protection module has a built-in automatic interlocking protection mechanism for the drive voltage, based on the energy formula of a single pulse injected into the LED. A discharge protection curve is constructed, where Q is the energy injected into the LED in a single pulse, U is the forward voltage, T is the pulse duration, and R is the equivalent internal resistance. The protection module automatically calculates and limits the maximum allowable overload drive voltage based on the set light emission duration.

9. A high-speed LED lighting device according to claim 8, characterized in that, The protection module uses the formula Calculate the maximum allowable pulse duration at a predetermined voltage. ,in The maximum single-passable energy is determined; when the input voltage, pulse width, and frequency parameters exceed the voltage-pulse width protection curve range, the software closed-loop control automatically interlocks or dynamically adjusts to limit the maximum allowable pulse width or reduce the drive voltage.

10. A high-speed LED lighting device according to claim 1, characterized in that, The multiple LED light source modules adopt an adjustable 3-piece combined lens design to achieve high uniformity BOS illumination. The structural layout according to the optical path is as follows: mirror light source, first lens, second lens, third lens and fourth lens.

11. A high-speed LED lighting device according to claim 10, characterized in that, The first lens, the second lens, and the third lens have the same aperture and focal length, which are used to achieve three-level progressive homogenization and convert the divergent light source into a parallel reference beam; The distance between the fourth lens and the third lens is adjustable.

12. The application of a high-speed LED lighting device according to any one of claims 1 to 11 in high-speed imaging, PIV, BOS, and industrial strobe scenarios.

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