An external flash

Abstract

The utility model relates to the technical field of electronic equipment accessories, concretely is a kind of external flash, comprising: carrier, control unit, trigger unit and light emitting unit;Carrier is detachably connected to the outer circumferential side of mobile terminal;Control unit is integrated on carrier;Trigger unit is signal connected with control unit, for gathering the light signal that mobile terminal self-contained flash emits;Light emitting unit is integrated on carrier and is signal connected with control unit;The utility model is through the mutual cooperation of control unit, trigger unit and light emitting unit, the built-in flash of mobile terminal self-contained is converted from traditional execution unit into trigger unit, adopts physical light sense trigger mode and directly controls light emitting unit work, need not be limited by the design space of mobile terminal, power consumption budget, can be flexibly configured higher power light emitting component, its light intensity, luminous brightness is far superior to mobile terminal built-in flash, and light supplement coverage is wider.

Description

Technical Field

[0001] This utility model relates to the field of electronic device accessories technology, specifically an external flashlight. Background Technology

[0002] To meet the shooting needs in low-light environments and improve the brightness and clarity of the image, most mobile terminals (smartphones, tablets, etc.) have built-in flash modules to provide temporary supplemental lighting for the subject in low-light scenes, helping users complete basic shooting operations.

[0003] However, due to limitations in the overall design space, power consumption control, and cost budget of mobile terminals, built-in flashes generally have low power and brightness, resulting in limited fill light capabilities and difficulty in providing effective fill light for distant subjects or large shooting scenes. Therefore, we propose an external flash to effectively address these shortcomings. Utility Model Content

[0004] The purpose of this utility model is to provide an external flash to solve the problem of limited fill light capability of the built-in flash of mobile terminals in the prior art mentioned in the background.

[0005] This utility model is achieved through the following technical solution: an external flash unit, comprising: The carrier is detachably connected to the outer periphery of the mobile terminal; Control unit, which is integrated on the carrier; A triggering unit, which is signal-connected to the control unit, is used to collect the light signal emitted by the flashlight of the mobile terminal. A light-emitting unit, which is integrated on the carrier and signal-connected to the control unit; When the triggering unit detects the light signal emitted by the flashlight of the mobile terminal, the light-emitting unit starts to emit light.

[0006] Optionally, the triggering unit is integrated on the carrier, and the light collection direction of the triggering unit is oriented towards the light emission direction of the flash lamp built into the mobile terminal.

[0007] Optionally, the triggering unit is integrated on the carrier, and a light-guiding part is connected to the triggering unit. The light-guiding part is used to transmit the light signal emitted by the flash of the mobile terminal to the triggering unit.

[0008] Optionally, the light collection direction of the trigger unit is oriented towards the light emission direction of the built-in flash of the mobile terminal, and an adjustable connecting part is connected between the trigger unit and the carrier. The connecting part is used to enable the light collection direction of the trigger unit to be adapted to the position of the built-in flash of different models of mobile terminals.

[0009] Optionally, the connecting part can be housed to the outer periphery of the carrier through at least one of the following structural forms: bending, folding, and stretching.

[0010] Optionally, the triggering unit is a photosensitive element.

[0011] Optionally, the light-emitting unit is an integrated light-emitting module, which has supplementary lighting and flashing functions; When the trigger unit detects the pre-flash signal emitted by the mobile terminal's built-in flash, the integrated light-emitting module starts to provide supplementary lighting. When the trigger unit collects the main flash signal emitted by the mobile terminal's built-in flash, the integrated light-emitting module starts flashing.

[0012] Optionally, the light-emitting unit includes a supplementary light module and a flash module; When the trigger unit detects the pre-flash signal emitted by the mobile terminal's built-in flash, the fill light module starts to emit light. When the trigger unit detects the main flash signal emitted by the mobile terminal's built-in flash, the flash module starts to emit light.

[0013] Optionally, the supplementary lighting module may employ at least one of xenon lamps, halogen lamps, light-emitting diodes, or laser diodes.

[0014] Optionally, the flash module may employ at least one of a xenon lamp, a halogen lamp, a light-emitting diode, or a laser diode.

[0015] Compared with the prior art, the present invention provides an external flash unit, which has the following advantages: This invention transforms the built-in flash of a mobile terminal from a traditional fill light execution unit into a trigger unit through the cooperation of a control unit, a trigger unit, and a light-emitting unit. It directly controls the light-emitting unit by using a physical light-sensing trigger method, without being limited by the design space and power consumption budget of the mobile terminal. It can flexibly configure higher power light-emitting components, and its light intensity and brightness are far superior to the built-in flash of the mobile terminal, with a wider fill light coverage. Attached Figure Description

[0016] Figure 1 This is a front view of the present invention; Figure 2 for Figure 1 A diagram from another perspective; Figure 3 This is a schematic diagram of the back of the present invention; Figure 4 This is an exploded view of the present invention; Figure 5 This is a schematic diagram of the integrated light-emitting module of this utility model; Figure 6This is a control diagram of the supplementary lighting module and the flash module of this utility model; Figure 7 This is a circuit diagram of the trigger unit of this utility model; Figure 8 This is a diagram of the pre-flash and main flash signals of this utility model; Figure 9 This is the circuit diagram of the LED of this utility model; Figure 10 This is the circuit diagram of the xenon lamp of this utility model; Figure 11 This is a system block diagram of the present invention.

[0017] In the diagram: 1. Carrier; 2. Control unit; 3. Trigger unit; 4. Light-emitting unit; 5. Connecting part. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 11 An external flash unit includes: a carrier 1, a control unit 2, a triggering unit 3, and a light-emitting unit 4, which is used to compensate for the performance defects of built-in flash units in mobile terminals such as smartphones and tablets, and improve the fill light effect for shooting.

[0020] The carrier 1 is detachably connected to the outer periphery of the mobile terminal and is used to carry various functional modules. The installation position of the carrier 1 is not limited and can be adapted to all areas of the mobile terminal where detachable installation is possible, such as the back, sides, and front edges.

[0021] Secondly, the control unit 2 is integrated onto the carrier 1. The control unit 2 includes a circuit board and a power module integrated inside the carrier 1. The power module, trigger unit 3, and light-emitting unit 4 are all electrically connected to the circuit board. Control buttons, a charging interface, and other components are also integrated on the outer side of the carrier 1; the charging interface is used to replenish power to the power module, ensuring continuous operation of the device. The control buttons include a power switch, a mode switch, and a parameter adjustment button; the mode switch is used to switch between the flash mode and the fill light mode of this external flash; in fill light mode, the light-emitting unit 4 remains constantly lit, and the parameters such as the luminous intensity and color temperature of the light-emitting unit 4 can be adjusted using the parameter adjustment buttons.

[0022] In addition, the trigger unit 3 is signal-connected to the control unit 2 and is used to collect the light signal emitted by the flash of the mobile terminal. The light signal includes, but is not limited to, light intensity, frequency, and emission form (such as constant light, pulse, flash, etc.). The trigger unit 3 can be selected from various light signal acquisition components such as optical sensors and photosensitive elements; its signal transmission method with the control unit 2 is not limited and can adopt wired transmission methods such as ribbon cables and contact points, or wireless transmission methods such as Bluetooth and infrared, to adapt to different structural design requirements.

[0023] Finally, the light-emitting unit 4 is integrated onto the carrier 1 and signal-connected to the control unit 2. The light-emitting component of the light-emitting unit 4 can be any high-power light-emitting device such as LEDs or xenon lamps, without being limited by the design of the mobile terminal itself. When the trigger unit 3 collects the light signal emitted by the flash of the mobile terminal, the light-emitting unit 4 starts to emit light, achieving synchronous supplementary lighting.

[0024] With the above design, when the external flash is installed on a mobile terminal (such as the back of a mobile phone) via the carrier 1, the trigger unit 3 can be set to correspond to the light emission direction of the mobile terminal's built-in flash. This ensures that when the mobile terminal's built-in flash emits light, the trigger unit 3 can accurately collect its light signal and trigger the light-emitting unit 4 to work. This transforms the traditional supplementary lighting execution unit of the mobile terminal into a trigger unit, directly controlling the light-emitting unit 4 using a physical light-sensing trigger method. It is not constrained by the design space and power consumption budget of the mobile terminal, and can flexibly configure higher-power light-emitting components, effectively compensating for the performance shortcomings of the built-in flash.

[0025] In this application, the triggering unit 3 can be connected to the carrier 1 in the following manner: Method 1: The trigger unit 3 is integrated into the carrier 1, and the light acquisition direction of the trigger unit 3 faces the light emission direction of the mobile terminal's built-in flash, ensuring accurate capture of the light signal emitted by the built-in flash. For example, if the carrier 1 is a protective case for the mobile terminal, the trigger unit 3 is directly integrated into the corresponding position of the protective case and aligned with the light emission area of ​​the mobile terminal's built-in flash. This allows for stable and accurate light signal acquisition without requiring additional adjustment of the trigger unit 3's installation position by the user.

[0026] Method 2: The trigger unit 3 is integrated onto the carrier 1. A light-guiding part is connected to the trigger unit 3, which is used to transmit the light signal emitted by the built-in flash of the mobile terminal to the trigger unit 3. For example, when the carrier 1 is an independent shell (not the protective shell of the mobile terminal), since the trigger unit 3 is fixedly integrated into this independent shell, and the built-in flashes of different mobile terminal models have different installation positions, in order to ensure that the trigger unit 3 can stably collect the light signal of the built-in flash of each mobile terminal model without being limited by the installation position, the addition of a light-guiding part can realize the long-distance or staggered transmission of the light signal, effectively improving the adaptability and flexibility of the device.

[0027] The light-guiding part can use a flexible light guide strip, and its cooperation with the mobile terminal's built-in flash can be in the following ways, including but not limited to: 1. The light-incident end of the flexible light guide strip is fixed to the light-emitting area of ​​the mobile terminal's built-in flash using self-adhesive adhesive. 2. The light-incident end of the flexible light guide strip is equipped with a magnetic attraction component, which, together with the magnetic ring attached to the periphery of the flash of the mobile terminal, enables the light-incident end to be attracted and fixed to the flash area. 3. The flexible light guide strip has a bendable wire embedded inside or outside to adjust the orientation and position of the light-inlet end as needed, ensuring precise alignment with the light output direction of the flash.

[0028] In addition, the light-guiding unit can also use optical fiber, or transmit the light signal of the mobile terminal's built-in flash to the trigger unit 3 through optical refraction and reflection structures, so as to achieve accurate acquisition of light signals and further improve the adaptability.

[0029] Method 3: The light collection direction of the trigger unit 3 faces the light emission direction of the mobile terminal's built-in flash. An adjustable connecting part 5 connects the trigger unit 3 and the carrier 1. The connecting part 5 is used to adapt the light collection direction of the trigger unit 3 to the position of the built-in flash of different mobile terminal models. For example, when the carrier 1 is an independent shell (not the protective shell of the mobile terminal), since the installation position and layout of the built-in flash of different mobile terminal models are different on the surface of the device, by setting the adjustable connecting part 5, the spatial position and posture of the trigger unit 3 can be flexibly adjusted to ensure that its light collection direction always accurately corresponds to the light emission direction of the mobile terminal's built-in flash, thereby stabilizing the collection of light signals and effectively improving the device's adaptability and universality to different mobile terminal models.

[0030] The connecting part 5 can adopt any of the following structural forms: 1. Made of bendable and shape-maintaining material (such as metal tube), the bending angle can be adjusted as needed and the shape can be maintained; 2. The use of movable structures (such as folding linkages and sliding support rods) allows for flexible adjustment of length or installation position; 3. The structure has a fixed shape, and the connecting part 5 is detachably connected to the carrier 1 or the trigger unit 3 so that the connecting part 5 of different specifications can be replaced according to the mobile terminal model.

[0031] Through the above structural design, the trigger unit 3 has a large degree of freedom in position adjustment, can be adapted to different models of mobile terminals, and ensures that its light acquisition end can cover the built-in flash of the mobile terminal, thus ensuring trigger reliability.

[0032] For example, such as Figures 1 to 4As shown, the carrier 1 is a shell structure with an inner cavity, in which the control unit 2 and the light-emitting unit 4 are both built-in. A protective plate corresponding to the light-emitting end of the light-emitting unit 4 is embedded on the side wall of the shell. The protective plate can be a transparent sheet or a diffuser sheet, which can protect the light-emitting unit 4 and adjust the light emission effect as needed. In this embodiment, a magnetic component is provided on the side of the shell near the mobile terminal. This magnetic component is compatible with the magnetic suction assembly built into the back of the mobile terminal, enabling the carrier 1 to be detachably fixed to the back of the mobile terminal, making installation convenient and the connection stable. Furthermore, in this embodiment, the connecting part 5 adopts a folding linkage, which allows the trigger unit 3 to have a large degree of freedom in position adjustment.

[0033] It should be added that the detachable connection method between carrier 1 and mobile terminal is not limited to this. It can also adopt any feasible detachable connection structure such as suction cup adsorption, elastic claw clamping, or strap binding to adapt to the shape design requirements of different mobile terminals.

[0034] In this embodiment, the triggering unit 3 is a photosensitive element. The photosensitive element can be a photodiode, a photoresistor, a photocoupler, etc., used to convert the light signal from the built-in flash of the mobile terminal into an electrical signal so that the control unit 2 can recognize it and trigger subsequent actions.

[0035] In one embodiment, the light-emitting unit 4 is an integrated light-emitting module, which has both supplementary lighting and flashing functions, and can simultaneously meet the dual needs of supplementary lighting and flashing.

[0036] When the trigger unit 3 collects the pre-flash signal emitted by the built-in flash of the mobile terminal, the control unit 2 responds immediately and the integrated light-emitting module starts to supplement the light. When the trigger unit 3 collects the main flash signal emitted by the mobile terminal's built-in flash, the control unit 2 switches the control logic, and the integrated light-emitting module starts the flash, achieving precise synchronization with the mobile terminal's shooting process.

[0037] It is worth mentioning that the connecting part 5 can be housed to the outer periphery of the carrier through at least one of the following structural forms: bending, folding, and telescoping. Specifically, the carrier 1 includes a first side and a second side that are opposite to each other, as well as an outer periphery located on the first side and the second side; the light-emitting unit 4 is disposed on the first side, and the second side is detachably connected to the mobile terminal.

[0038] As a preferred embodiment, such as Figure 5As shown, the connecting part 5 is housed on the outer periphery of the carrier 1 by bending. An integrated light-emitting module (arranged in a circle) is provided in the middle of the first side of the carrier 1. A storage groove for housing the connecting part 5 is opened on the outer periphery of the carrier 1. The connecting part 5 can be rolled up or embedded in the storage groove, which combines portability and neat storage. One end of the connecting part 5 is used to fix the trigger unit 3. The trigger unit 3 is electrically connected to the circuit board of the control unit 2 through the hidden wiring inside the connecting part 5, avoiding damage or tangling caused by exposed wiring. At the same time, the connecting part 5 has built-in metal wire or other bendable and shape-forming material, which can adjust the bending angle and extension length as needed, thereby adapting to the installation position of the built-in flash of different mobile terminal models and ensuring that the light-collecting end of the trigger unit 3 is accurately aligned with the light output direction of the flash.

[0039] In addition, a corresponding storage opening can be provided on the outer periphery of the carrier 1, and the connecting part 5 can be stored in the storage opening by folding or telescopic means, which can also achieve the effect of convenient storage and flexible use.

[0040] In another embodiment, the light-emitting unit 4 adopts a split structure, including an independently configured supplementary lighting module and a flash module, achieving a more targeted supplementary lighting effect through module division of labor. Specifically, the supplementary lighting module uses at least one of xenon lamps, halogen lamps, light-emitting diodes, or laser diodes. The flash module uses at least one of xenon lamps, halogen lamps, light-emitting diodes, or laser diodes.

[0041] When the trigger unit 3 collects the pre-flash signal emitted by the built-in flash of the mobile terminal, the fill light module starts to emit light; When the trigger unit 3 collects the main flash signal emitted by the mobile terminal's built-in flash, the flash module starts to emit light, making the pre-flash fill light and the main flash exposure function more accurately matched.

[0042] As a preferred implementation, the fill light module uses light-emitting diodes (LEDs), which have the characteristics of low power consumption, stable light emission, and fast response. They can not only provide an auxiliary light source for the pre-flash metering process of mobile terminals, but also support a constant-on fill light mode to meet the needs of scenarios such as continuous fill light for night scenes and soft fill light for portraits.

[0043] As a preferred implementation, the flash module uses a xenon lamp for instantaneous high-intensity fill light during the exposure stage of shooting. Compared with the built-in flash of the mobile terminal, the xenon lamp has higher light intensity, stronger light penetration, and more uniform light distribution, which can effectively improve the brightness level and detail reproduction of the shooting image, and completely solve the technical defects of insufficient fill light, messy light, and overexposure at close range of the built-in flash.

[0044] It should be noted that when a mobile terminal (such as a mobile phone) enables flash photography mode, after pressing the shutter button, its built-in flash will follow the TTL (Through-The-Lens) pre-flash metering process: First, the built-in flash emits a pre-flash line, and the mobile terminal's camera module collects the reflected light of this pre-flash line on the subject through the lens, instantly calculating the exposure parameters (such as aperture size, shutter speed, ISO sensitivity, etc.) suitable for the current scene; after completing the metering, the built-in flash then emits the main flash for the shooting exposure, working with the camera module to complete the image.

[0045] like Figure 6 As shown, the workflow of this application is precisely synchronized with the aforementioned TTL metering process: when the mobile terminal's built-in flash emits a pre-flash signal, the trigger unit 3 (photosensitive element) acquires the pre-flash signal in real time and feeds it back to the control unit 2. The control unit 2 then triggers the fill light module (LED lamp) to emit light. The mobile terminal's camera module measures the reflected light based on the fill light emitted by the LED lamp, and then calculates the precise parameters suitable for the subsequent main exposure. Since these exposure parameters are obtained based on the light emission characteristics of the LED lamp, they can better match the light intensity output characteristics of the flash module (xenon lamp), avoiding exposure deviations caused by differences in light source characteristics.

[0046] When the mobile terminal's built-in flash emits its main flash, trigger unit 3 again collects the main flash signal and transmits it to control unit 2. Control unit 2 then simultaneously triggers the xenon lamp to emit light, providing a high-intensity main light source for shooting. Trigger unit 3 can accurately distinguish between the pre-flash signal and the main flash signal by recognizing the difference in light intensity emitted by the built-in flash (the pre-flash intensity is lower than the main flash intensity), thereby triggering the LED lamp and xenon lamp respectively, ensuring a smooth transition between metering and exposure processes.

[0047] The specific signal processing flow is as follows: Trigger unit 3 (i.e., photosensitive element PD) is set to correspond to the light emission area of ​​the built-in flash of the mobile terminal. After collecting the light signal emitted by the built-in flash, it converts the light signal into an electrical signal that can be processed by control unit 2 (MCU) through comparator U11 and transmits it to the MCU. The waveform of this electrical signal is as follows: Figure 8 As shown, it consists of continuous pre-flash signals and main flash signals: when the pre-flash signal is triggered, during the high-level period of the pre-flash signal, the MCU outputs an LED enable signal to control the LED to turn on, providing a stable light source for the TTL metering of the mobile terminal; when the main flash signal is triggered, the MCU outputs a xenon lamp trigger signal to control the xenon lamp to emit light instantaneously, providing the main exposure light source for shooting.

[0048] Figure 9The circuit diagram for the LED fill light module is as follows: Based on the pre-flash signal collected by trigger unit 3, the MCU controls the LED to emit a pre-flash line, which works with the mobile terminal to complete the light metering. At the same time, the MCU can independently control the LED to enter a constant-on mode to achieve continuous fill light. In addition, the MCU outputs the LED_DIM signal and uses PWM (Pulse Width Modulation) duty cycle adjustment to precisely control the brightness of the LED. By adjusting the brightness ratio of the warm light LED (A channel) and the cool light LED (B channel, not shown in the figure) respectively, the color temperature and total brightness of the output light are flexibly adjusted in a mixed light method to adapt to the fill light needs of different shooting scenarios.

[0049] Figure 10 This is the circuit schematic of the flash module (xenon lamp). The MCU controls the xenon lamp to complete the instantaneous flash based on the main flash signal collected by trigger unit 3. The circuit consists of two parts: a capacitor boost circuit and a xenon lamp trigger circuit. Capacitor boost circuit: The MCU outputs a control signal to NMOS transistor Q2, which controls transformer T1 to convert low-voltage power (which can be an internal battery or an external DC power supply) into high-voltage power to charge the energy storage capacitor. At the same time, the real-time voltage of the energy storage capacitor is fed back to the MCU through the capacitor voltage detection circuit. The MCU then performs closed-loop precise control of the boost process to ensure that the energy storage capacitor reaches the target voltage value and to ensure the stable luminous intensity of the xenon lamp.

[0050] Xenon lamp triggering circuit: The MCU sends a control signal to the IGBT driver chip U5, and the driver chip U5 outputs a drive signal to control the IGBT to conduct; at this time, the trigger coil T2 will instantaneously generate a 4KV high voltage, which will excite the xenon lamp FT1 to the plasma state; after the xenon lamp is excited, the energy storage capacitor releases the stored high voltage energy to power the xenon lamp, making it emit a high-intensity flash; the luminous power of the xenon lamp can be precisely controlled by the MCU by adjusting the conduction time of the IGBT.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external flash unit, characterized in that, include: The carrier is detachably connected to the outer periphery of the mobile terminal; Control unit, which is integrated on the carrier; A triggering unit, which is signal-connected to the control unit, is used to collect the light signal emitted by the flashlight of the mobile terminal. A light-emitting unit, which is integrated on the carrier and signal-connected to the control unit; When the triggering unit detects the light signal emitted by the flashlight of the mobile terminal, the light-emitting unit starts to emit light.

2. An external flash unit according to claim 1, characterized in that: The triggering unit is integrated on the carrier, and the light collection direction of the triggering unit is oriented towards the light output direction of the flash lamp built into the mobile terminal.

3. An external flash unit according to claim 1, characterized in that: The triggering unit is integrated on the carrier, and a light-guiding part is connected to the triggering unit. The light-guiding part is used to transmit the light signal emitted by the flash of the mobile terminal to the triggering unit.

4. An external flash unit according to claim 1, characterized in that: The light collection direction of the trigger unit is oriented towards the light emission direction of the built-in flash of the mobile terminal. An adjustable connecting part is connected between the trigger unit and the carrier. The connecting part is used to enable the light collection direction of the trigger unit to be adapted to the position of the built-in flash of different mobile terminal models.

5. An external flash unit according to claim 4, characterized in that: The connecting part can be housed to the outer periphery of the carrier through at least one of the following structural forms: bending, folding, and stretching.

6. An external flash unit according to any one of claims 1 to 5, characterized in that: The triggering unit is a photosensitive element.

7. An external flash unit according to claim 1, characterized in that: The light-emitting unit is an integrated light-emitting module, which has supplementary lighting and flashing functions; When the trigger unit detects the pre-flash signal emitted by the mobile terminal's built-in flash, the integrated light-emitting module starts to provide supplementary lighting. When the trigger unit collects the main flash signal emitted by the mobile terminal's built-in flash, the integrated light-emitting module starts flashing.

8. An external flash unit according to claim 1, characterized in that: The light-emitting unit includes a supplementary light module and a flash module; When the trigger unit detects the pre-flash signal emitted by the mobile terminal's built-in flash, the fill light module starts to emit light. When the trigger unit detects the main flash signal emitted by the mobile terminal's built-in flash, the flash module starts to emit light.

9. An external flash unit according to claim 8, characterized in that: The supplementary lighting module uses at least one of xenon lamps, halogen lamps, light-emitting diodes, or laser diodes.

10. An external flash unit according to claim 8, characterized in that: The flash module uses at least one of xenon lamps, halogen lamps, light-emitting diodes, or laser diodes.

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