LED flash lamp

Abstract

The utility model provides an LED flash lamp, and belongs to the technical field of photographic light. The LED flash lamp comprises a light-emitting device, and the light-emitting device has at least two different light-emitting parameters, so that light with the at least two different light-emitting parameters and a combination of the at least two different light-emitting parameters can be emitted. Certain electric quantity is stored through the capacitive energy storage circuit, and when flashing is needed, the stored electric quantity can be output to the light-emitting device together, so that the light-emitting device can flash. The flash energy of the light-emitting device can be correspondingly controlled through the first flash control circuit. Through the capacitive energy storage circuit and the first flash control circuit, the light-emitting device can emit at least two kinds of flash with different light-emitting parameters and the combination thereof, so that the requirements of different flash effects in different shooting scenes can be met.

Description

Technical Field

[0001] The present application relates to the field of photographic lighting, and in particular to an LED flashlight. Background Art

[0002] LED lights are widely used in various lighting occasions in life due to their advantages such as low power consumption, long life and small size. In photography occasions such as photo studios, people also often use LED lights for photography fill lighting.

[0003] The flash provides illumination in low light conditions. For optimal color rendering, the color of the flash should match the hue of the subject and / or the entire photographic scene. In the prior art, LED lights can be used as photographic flashes through circuit design, but the light emission band of the LED lights cannot be adjusted, thus failing to meet the requirements of different flash effects in different shooting scenes. Utility Model Content

[0004] The main purpose of the embodiments of the present application is to provide an LED flash that can meet the needs of different flash effects in different shooting scenes.

[0005] To achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides an LED flashlight, comprising:

[0006] A light emitting device, comprising a first light emitting unit and a second light emitting unit, wherein the first light emitting unit and the second light emitting unit have different light emitting parameters;

[0007] A capacitor energy storage circuit, wherein a first end of the capacitor energy storage circuit is electrically connected to a first end of the light emitting device, a second end of the capacitor energy storage circuit is grounded, and the first end of the capacitor energy storage circuit is also used to access a power supply voltage;

[0008] The first flash control circuit is electrically connected to the light emitting device and is used to control the flash energy of the light emitting device.

[0009] In one embodiment of the present application, the first flash control circuit includes:

[0010] An NMOS switch tube, wherein the gate of the NMOS switch tube is electrically connected to a PWM control signal, the source of the NMOS switch tube is grounded, and the PWM control signal is used to control the flash energy of the light emitting device;

[0011] A freewheeling diode, wherein the input end of the freewheeling diode is electrically connected to the drain of the NMOS switch tube, and the output end of the freewheeling diode is electrically connected to the first end of the light emitting device;

[0012] A choke inductor, one end of which is electrically connected to the second end of the light emitting device, and the other end of which is electrically connected to the input end of the freewheeling diode and the drain of the NMOS switch tube.

[0013] In one embodiment of the present application, the first flash control circuit further includes a PWM controller, the PWM controller is electrically connected to the gate of the NMOS switch tube, and the PWM controller is used to adjust and output the PWM control signal.

[0014] In one embodiment of the present application, the first flash control circuit also includes a protection circuit, which is connected between the PWM controller and the gate of the NMOS switch tube. The protection circuit includes a first resistor and a first diode. The first resistor and the first diode are connected in parallel, and the input end of the first diode is connected to the gate of the NMOS switch tube, and the output end of the first diode is connected to the PWM controller.

[0015] In one embodiment of the present application, the lamp beads contained in each group of the LED lamp groups include single-color lamp beads with single temperature or multi-color lamp beads or multi-color lamp beads or multi-color temperature lamp beads or multi-color temperature and multi-color combination lamp beads.

[0016] In one embodiment of the present application, the number of the LED light groups is the same as the number of the first flash control circuits, and each of the first flash control circuits is electrically connected to a group of the LED light groups.

[0017] In one embodiment of the present application, the number of the LED light groups is the same as the number of the capacitor energy storage circuits, and each of the capacitor energy storage circuits is electrically connected to a group of the LED light groups.

[0018] In one embodiment of the present application, the LED flash light also includes a second flash control circuit, which is connected between the first end of the capacitor energy storage circuit and the input end of the LED light group, and is used to control the capacitor energy storage circuit to output voltage to the LED light group.

[0019] In one embodiment of the present application, the number of the LED light groups is the same as the number of the second flash control circuits, and each of the second flash control circuits is electrically connected to a group of the LED light groups; or, multiple groups of the LED light groups share one second flash control circuit.

[0020] In one embodiment of the present application, the LED flash lamp further includes a charging circuit, which is respectively connected to the second flash control circuit and the capacitive energy storage circuit. The charging circuit is configured to charge the capacitive energy storage circuit at a set charging voltage according to a charging control instruction sent by the second flash control circuit.

[0021] In one embodiment of the present application, the LED flash lamp further includes a boosting circuit. One end of the boosting circuit is used to connect to a power supply voltage, and the other end of the boosting circuit is connected to the charging circuit. The boosting circuit is configured to boost the power supply voltage and then input it into the charging circuit.

[0022] In one embodiment of the present application, the LED flash lamp further includes:

[0023] A constant-on control module, which is connected to one or more groups of the LED lamp groups and is configured to drive the LED lamp groups at a rated voltage;

[0024] A main control module, which is respectively connected to the first flash control circuit and the constant-on control module and is configured to selectively send control instructions to the first flash control circuit or the constant-on control module.

[0025] In the technical solution provided by the embodiment of the present application, the LED flash lamp includes a light-emitting device. Among them, the light-emitting device includes a first light-emitting unit and a second light-emitting unit, and the first light-emitting unit and the second light-emitting unit have different light-emitting parameters, so that the light-emitting device can emit light with at least two different light-emitting parameters and their combinations. By storing a certain amount of electricity through the capacitive energy storage circuit, when a flash is needed, the stored electricity can be output to the light-emitting device together, so that the light-emitting device can emit a flash. Through the first flash control circuit, the flash energy of the light-emitting device can be correspondingly controlled. That is, through the capacitive energy storage circuit and the first flash control circuit, the light-emitting device can emit flashes with at least two different light-emitting parameters and their combinations, so as to meet the requirements of different flash effects in different shooting scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic circuit diagram of the LED flash lamp provided in the first embodiment of the present application;

[0027] Figure 2 is a circuit diagram of the LED flash lamp provided in the first embodiment of the present application;

[0028] Figure 3 is a schematic diagram of a high-level turn-on branch;

[0029] Figure 4 is a schematic diagram of a low-level turn-on branch;

[0030] Figure 5 This is a schematic diagram of the circuit principle of the LED flashlight provided in the second embodiment of the present application;

[0031] Figure 6 This is a circuit diagram of an LED flashlight provided in Embodiment 3 of the present application;

[0032] Figure 7 This is a circuit diagram of an LED flashlight provided in Embodiment 4 of the present application;

[0033] Figure 8 This is a circuit diagram of an LED flashlight provided in Embodiment 5 of the present application;

[0034] Fig. 9 This is a schematic diagram of the circuit principle of the LED flashlight provided in Example 6 of the present application;

[0035] Fig.10 This is a schematic diagram of the circuit principle of the LED flashlight provided in Embodiment 7 of the present application;

[0036] Fig.11 This is a schematic diagram of the circuit principle of the LED flashlight provided in the eighth embodiment of the present application;

[0037] Fig.12 is a schematic diagram of a second flash control circuit;

[0038] Fig.13 This is a schematic diagram of the circuit principle of the LED flashlight provided in the ninth embodiment of the present application;

[0039] Fig.14 This is a schematic diagram of the circuit principle of the LED flashlight provided in the tenth embodiment of the present application;

[0040] Fig.15 This is a schematic diagram of the circuit principle of the LED flashlight provided in the eleventh embodiment of the present application;

[0041] Fig.16 is a schematic diagram of the charging circuit;

[0042] Fig.17 This is a schematic diagram of the circuit principle of the LED flashlight provided in the twelfth embodiment of the present application.

[0043] Description of reference numerals:

[0044] Light emitting device 110 ; capacitor energy storage circuit 120 ; first flash control circuit 130 ; PWM controller 131 ; protection circuit 132 ; constant light control module 140 ; ​​main control module 150 ; second flash control circuit 160 ; charging circuit 170 ; boost circuit 180 . DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flow chart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0048] The flash provides illumination in low light conditions. For optimal color rendering, the color of the flash should match the hue of the subject and / or the entire photographic scene. In the prior art, LED lights can be used as photographic flashes through circuit design, but the light emission band of the LED lights cannot be adjusted, thus failing to meet the requirements of different flash effects in different shooting scenes.

[0049] Based on this, an embodiment of the present application proposes an LED flash that can meet the needs of different flash effects in different shooting scenes.

[0050] Terminology explanation:

[0051] PWM: PWM (Pulse Width Modulation) is a method of digitally encoding analog signal levels. Through the use of high-resolution counters, the duty cycle of a square wave is modulated to encode the level of a specific analog signal. The PWM signal is still digital because at any given moment, the full-scale DC power supply is either fully present (ON) or completely absent (OFF). The voltage or current source is applied to the analog load in a repetitive sequence of pulses that are either on (ON) or off (OFF). The on time is when the DC power supply is applied to the load, and the off time is when the power supply is disconnected.

[0052] The main features of PWM pulses include:

[0053] Duty cycle: In a PWM cycle, the ratio of the time that the pulse is at a high level (pulse width) to the entire cycle time is called the duty cycle. The size of the duty cycle determines the average voltage or current level of the PWM signal.

[0054] Frequency: The frequency of a PWM signal is the inverse of its period. It determines how fast the PWM signal changes.

[0055] Resolution: The resolution of PWM depends on the number of bits in the counter or register used to control the pulse width. The more bits there are, the higher the resolution and the higher the simulation accuracy that can be achieved.

[0056] LED: LED (Light Emitting Diode) is a solid-state semiconductor device that can convert electrical energy into visible light, and can directly convert electricity into light.

[0057] In order to better understand the LED flash proposed in this application, the LED flash will be described in detail below in conjunction with the drawings and specific implementation methods of the specification. Obviously, the embodiments described in this application are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0058] Embodiment 1

[0059] Reference Figure 1-Figure 2 , Figure 1 Schematic diagram of the circuit principle of the LED flashlight provided in the first embodiment of the present application. Figure 2 Schematic diagram of the circuit of the LED flashlight provided in the first embodiment of the present application. Figure 1 As shown, the LED flash includes a light emitting device 110, a capacitor energy storage circuit 120 and a first flash control circuit 130. The light emitting device 110 includes a first light emitting unit and a second light emitting unit, and the first light emitting unit and the second light emitting unit may have different light emitting parameters under the same driving condition. That is, the light emitting device 110 can emit light with different light emitting parameters under the same driving condition, such as light with multiple different colors or multiple different color temperatures or different color temperatures and color combinations. The first end of the capacitor energy storage circuit 120 is electrically connected to the first end of the light emitting device 110, the second end of the capacitor energy storage circuit 120 is grounded, and the first end of the capacitor energy storage circuit 120 is also used to connect to the power supply voltage V IN. A certain amount of electricity can be stored through the capacitor energy storage circuit 120. When a flash is required, the stored electricity can be output to the light emitting device 110, so that the light emitting device 110 can emit a flash accordingly. The first flash control circuit 130 is electrically connected to the light emitting device 110 and can control the flash energy of the light emitting device 110. That is, through the capacitor energy storage circuit and the first flash control circuit, the light emitting device can emit flashes with different light emitting parameters and combinations thereof, thereby meeting the requirements for different flash effects in different shooting scenes.

[0060] It should be noted that the first light-emitting unit and the second light-emitting unit may be lamp beads. In this case, the light-emitting device may include the first lamp bead and the second lamp bead, and the first lamp bead and the second lamp bead may have different light-emitting parameters under the same driving conditions. The first light-emitting unit and the second light-emitting unit may also be light-emitting chips. In this case, the light-emitting device may include the first light-emitting chip and the second light-emitting chip. For example, the light-emitting device may be a lamp bead, and the lamp bead includes the first light-emitting chip and the second light-emitting chip. The first light-emitting chip and the second light-emitting chip may have different light-emitting parameters under the same driving conditions. For example, the first light-emitting chip and the second light-emitting chip may respectively emit light of different colors or different color temperatures.

[0061] In the embodiment of the present application, the light emitting device 110 may include a multi-color temperature lamp group, such as a dual-color temperature lamp group, such as a cold white light and a warm white light lamp. The light emitting device 110 may also be a multi-color lamp group, such as a lamp group of RGB three colors, RGBY four colors, five colors, six colors and more colors. The light emitting device 110 may also be a lamp group of a combination of color temperature and color. The light emitting device 110 may also be white light with different band intervals and peak values. The light emitting device 110 may also be various combinations of visible light in different bands or combinations of different color temperatures, etc.

[0062] In the embodiment of the present application, the capacitor energy storage circuit 120 is used to store electrical energy. Figure 2 , the capacitor energy storage circuit 120 includes an energy storage capacitor C1. The energy storage capacitor C1 may be an energy storage capacitor with adjustable energy storage capacity. By adjusting the energy storage capacity of the energy storage capacitor, the flash energy of the light emitting device 110 may be adjusted. The energy storage capacitor C1 may also be an energy storage capacitor with adjustable working voltage. By adjusting the working voltage applied to the energy storage capacitor C1, the flash energy of the light emitting device 110 may be adjusted.

[0063] Reference Figure 2 The first flash control circuit 130 includes an NMOS switch tube Q1, a freewheeling diode D2 and a choke inductor L1. Among them, the gate of the NMOS switch tube Q1 is electrically connected to the PWM control signal, and the source of the NMOS switch tube Q1 is grounded. The input end of the freewheeling diode D2 is electrically connected to the drain of the NMOS switch tube Q1, and the output end of the freewheeling diode D2 is electrically connected to the first end of the light-emitting device 110. One end of the choke inductor L1 is electrically connected to the second end of the light-emitting device 110, and the other end of the choke inductor L1 is electrically connected to the input end of the freewheeling diode D2 and the drain of the NMOS switch tube Q1. The freewheeling diode D2 and the choke inductor L1 form a freewheeling circuit, which provides a continuous working current to the light-emitting device 110 when the NMOS switch tube Q1 is turned off, thereby improving the stability and service life of the light-emitting device 110. The capacitor C4 is a capacitor used for filtering and voltage stabilization.

[0064] In the embodiment of the present application, the choke inductor L1 has the following functions: first, it limits the current passing through the LED lamp group to ensure that the LED lamp group will not be burned out by overcurrent; second, it stabilizes the current of the light-emitting device 110 and emits stable light during a single working PWM pulse group. The NMOS switch tube Q1 is used as a switching element to control the on-time and off-time of the light-emitting device 110 and the high-level open branch to GND (i.e., grounding) to adjust the current value of the light-emitting device 110 and the high-level open branch. When the NMOS switch tube Q1 is turned off, the current of the choke inductor L1 cannot change suddenly, and it flows to the light-emitting device 110 through the freewheeling diode D2 to form a discharge circuit.

[0065] It should be noted that Figure 2 In the circuit diagram shown, a high-level open branch and a low-level closed branch are formed. The high-level open branch refers to the route through which the current flows when the PWM control signal is high and the NMOS switch tube Q1 is turned on. The low-level closed branch refers to the discharge loop through which the current flows when the PWM control signal is low and the NMOS switch tube Q1 is turned off.

[0066] like Figure 3 As shown, Figure 3 Schematic diagram of a high level open branch. In the high level open branch, the current passes through the NMOS switch tube Q1, the freewheeling diode D2, the light emitting device 110, and the choke inductor L1 in sequence.

[0067] like Figure 4 As shown, Figure 4 In the low level closed branch, the current passes through the choke inductor L1, the capacitor C4 and the light emitting device 110 in sequence.

[0068] Reference Figure 2-Figure 4 The first flash control circuit 130 further includes a PWM controller 131, which is electrically connected to the gate of the NMOS switch tube Q1. The PWM controller 131 is used to adjust and output a PWM control signal. The first flash control circuit 130 further includes a protection circuit 132, which is connected between the PWM controller and the gate of the NMOS switch tube Q1. The protection circuit 132 includes a first resistor R1 and a first diode D1, which are connected in parallel, and the input end of the first diode D1 is connected to the gate of the NMOS switch tube Q1, and the output end of the first diode D1 is connected to the PWM controller 131.

[0069] In the embodiment of the present application, by adjusting the PWM control signal, the overall current in the circuit can be adjusted, and then the size of the flash energy of the light-emitting device 110 can be adjusted, so as to meet the actual use requirements of different photo taking and video shooting. For example, when the duty cycle of PWM is increased, the current rise ratio of the choke inductor L1 increases, and the overall current is larger, achieving the effect of increasing the current, which is manifested as an increase in the flash energy; and when the duty cycle of PWM is adjusted to a small value, the current drop ratio of the choke inductor L1 increases, and the overall current is smaller, achieving the effect of reducing the current, which is manifested as a decrease in the flash energy.

[0070] Specifically, the PWM pulse wave PWM-H and PWM-L are output in a specific cycle, the pulse wave length is limited, and the time length ratio of PWM-H and PWM-L in the cycle is adjusted to adjust the entire average current value of the light emitting device 110, specifically:

[0071] When the duty cycle is adjusted to a larger value, the PWM-H time ratio relative to the PWM-L time ratio increases, the current rise ratio of the choke inductor L1 increases, and the overall current is relatively large, achieving the effect of increasing the current, which is manifested as an increase in the flash energy; when the duty cycle is adjusted to a smaller value, the PWM-H time ratio relative to the PWM-L time ratio decreases, the current drop ratio of the choke inductor L1 increases, and the overall current is relatively small, achieving the effect of reducing the current, which is manifested as a decrease in the flash energy.

[0072] In the embodiment of the present application, the flash energy of the light emitting device 110 can be controlled accordingly through the first flash control circuit 130. And because the first light emitting unit and the second light emitting unit included in the light emitting device 110 have different light emitting parameters, that is, the light emitting device 110 can emit light with different light emitting parameters, such as a plurality of different colors or a plurality of different color temperatures or a combination of different color temperatures and colors, and then through the control of the first flash control circuit 130, the light emitting device 110 can emit flashes of different colors or a plurality of different color temperatures or a combination of different color temperatures and colors, thereby meeting the requirements of different flash effects in different shooting scenes.

[0073] Embodiment 2

[0074] In some embodiments, reference Figure 5 , Figure 5 FIG. 1 is a schematic diagram of the circuit principle of the LED flashlight provided in the second embodiment of the present application. Figure 5As shown, the LED flashlight includes a light-emitting device 110, a capacitor energy storage circuit 120 and a first flash control circuit 130. The first light-emitting unit and the second light-emitting unit included in the light-emitting device 110 have different light-emitting parameters, that is, the light-emitting device 110 can emit light with different light-emitting parameters, such as a plurality of different colors or a plurality of different color temperatures or a combination of different color temperatures and colors. The LED flashlight also includes a constant light control module 140 and a main control module 150. Among them, the constant light control module 140 is connected to the light-emitting device 110 and is used to drive the light-emitting device 110 with a rated voltage. The main control module 150 is respectively connected to the first flash control circuit 130 and the constant light control module 140, and is used to selectively send a control instruction to the first flash control circuit 130 or the constant light control module 140. In the embodiment of the present application, the light-emitting device 110 has at least two different light-emitting parameters, that is, the light-emitting device 110 can emit light with a plurality of different colors or a plurality of different color temperatures or a combination of different color temperatures and colors. The light emitting device 110 may include one or more LED light groups, and at least one of the one or more LED light groups may be selected as a controllable LED fill light that is always on. The LED flash light has two working modes, namely, a constant lighting mode (or a constant fill light mode) and a flash mode, and the constant lighting control module 140 or the first flash control circuit 130 is selectively driven by the main control module 150. When the constant lighting mode is selected, the constant lighting control module 140 is driven by the main control module 150, so that the light emitting device 110 is always on at a rated voltage, which is suitable for lighting work during daily shooting and videography. When the user selects the flash mode, the first flash control module 130 is driven by the main control module 150, so that the light emitting device 110 flashes, and it can be used as a photographic flash. Since the LED flash light has two different working modes, that is, one lamp has the functions of flash and constant lighting at the same time, the user no longer needs to prepare two lamps with different functions at the same time when shooting, which greatly reduces the economic burden of the photography user and is conducive to the promotion of the product in the market.

[0075] Embodiment 3

[0076] In some embodiments, the light emitting device 110 may include one or more LED light groups, each LED light group includes one lamp bead or multiple lamp beads connected in series, and each LED light group is connected in parallel.

[0077] Specifically, refer to Figure 6 , Figure 6 Schematic diagram of the circuit of the LED flashlight provided in the third embodiment of the present application. Figure 6As shown, the number of LED light groups is 1 group, that is, the LED flash light includes a group of LED light groups, and the group of LED light groups includes a lamp bead LED1. The lamp bead LED1 can be a multi-color lamp bead or a multi-color temperature lamp bead or a lamp bead with a combination of multi-color temperatures and multi-colors. The lamp bead LED1 can include a multi-color LED chip, so that the lamp bead LED1 can emit light of different colors or multiple different color temperatures or different color temperatures and color combinations.

[0078] Embodiment 4

[0079] The light emitting device 110 may include one or more LED light groups, Figure 7 , Figure 7 Schematic diagram of the circuit of the LED flashlight provided in the fourth embodiment of the present application. Figure 7 As shown, the number of LED light groups is 1 group, that is, the LED flash light includes a group of LED light groups, and the group of LED light groups includes a plurality of lamp beads connected in series in sequence, namely LED1, LED2, ..., LEDn. Since the group of LED light groups includes a plurality of lamp beads, each lamp bead can be a lamp bead including a single-color lamp bead with a single temperature or a multi-color lamp bead or a multi-color lamp bead or a lamp bead with a multi-color temperature or a combination of multiple colors. For example, the lamp beads LED1, LED2, ..., LEDn can all be single-color lamp beads with a single temperature or a single color, but the color temperature and color of each lamp bead can be different, so that the LED light group can emit light of different colors or a plurality of different color temperatures or a combination of different color temperatures and colors.

[0080] Embodiment 5

[0081] The light emitting device 110 may include one or more LED light groups, Figure 8 , Figure 8 Schematic diagram of the circuit of the LED flashlight provided in the fifth embodiment of the present application. Figure 8 As shown, the number of LED light groups is multiple, that is, the LED flash light includes multiple LED light groups, each LED light group includes multiple lamp beads connected in series in sequence, and each LED light group is connected in parallel. At this time, since the lamp beads included in each LED light group include single-color lamp beads with single temperature or multi-color lamp beads or multi-color temperature lamp beads or multi-color temperature and multi-color combination lamp beads, the multiple LED light groups can emit light of different colors or multiple different color temperatures or different color temperatures and color combinations.

[0082] Embodiment 6

[0083] In some embodiments, the light emitting device 110 may include one or more LED light groups, and the multiple LED light groups may be controlled by the first flash control circuit 130, or each LED light group may be controlled by a first flash control circuit 130. That is, the number of LED light groups is set to be the same as the number of first flash control circuits 130, so that each first flash control circuit 130 is electrically connected to a corresponding LED light group.

[0084] Reference Fig. 9 , Fig. 9 Schematic diagram of the circuit principle of the LED flashlight provided in the sixth embodiment of the present application. Fig. 9 As shown, the LED flashlight includes multiple groups of LED light groups, namely LED light group 1, LED light group 2, LED light group 3, ..., LED light group n, and the multiple groups of LED light groups are connected in parallel. The LED flashlight includes multiple first flash control circuits, namely first flash control circuit 1, first flash control circuit 2, first flash control circuit 3, ..., first flash control circuit n. Among them, each group of LED light groups is correspondingly connected to a first flash control circuit, that is, each group of LED light groups is correspondingly controlled by a first flash control circuit. Among them, multiple LED light groups can share a capacitor energy storage circuit 120, that is, a shared capacitor energy storage circuit 120 provides light-emitting energy for multiple LED light groups respectively.

[0085] Embodiment 7

[0086] The light emitting device 110 may include one or more LED light groups, Fig.10 , Fig.10 Schematic diagram of the circuit principle of the LED flashlight provided in the seventh embodiment of the present application. Fig.10 As shown, the LED flashlight includes a plurality of LED light groups, namely LED light group 1, LED light group 2, LED light group 3, ..., LED light group n, and the plurality of LED light groups are connected in parallel. The LED flashlight includes a plurality of first flash control circuits, namely first flash control circuit 1, first flash control circuit 2, first flash control circuit 3, ..., first flash control circuit n. Each LED light group is connected to a first flash control circuit, that is, each LED light group is controlled by a first flash control circuit. The LED flashlight includes a plurality of capacitor energy storage circuits, namely capacitor energy storage circuit 1, capacitor energy storage circuit 2, capacitor energy storage circuit 3, ..., capacitor energy storage circuit n, and each LED light group is connected to a capacitor energy storage circuit 120, that is, each LED light group is provided with luminous energy by a capacitor energy storage circuit 120.

[0087] In the embodiment of the present application, each group of LED lights is controlled by a corresponding first flash control circuit 130. Since the multiple groups of LED lights can emit light of multiple different colors or multiple different color temperatures or different color temperatures and color combinations, different color and color temperature effects can be obtained, and there is no need to replace color filters or lenses, which is easy to operate.

[0088] Embodiment 8

[0089] In some embodiments, reference Fig.11 , Fig.11 FIG. 1 is a schematic diagram of the circuit principle of the LED flashlight provided in the eighth embodiment of the present application. Fig.11 As shown, the LED flash includes a light emitting device 110, a capacitor energy storage circuit 120 and a first flash control circuit 130. The first light emitting unit and the second light emitting unit included in the light emitting device 110 have different light emitting parameters, that is, the light emitting device 110 can emit light with different light emitting parameters, such as a plurality of different colors or a plurality of different color temperatures or a combination of different color temperatures and colors. The LED flash also includes a second flash control circuit 160, which is connected between the first end of the capacitor energy storage circuit 120 and the first end of the light emitting device 110, and is used to control the capacitor energy storage circuit 120 to output a voltage to the LED light group 110. When it is necessary to generate a high-power flash, the second flash control circuit 160 drives the capacitor energy storage circuit 120 to transfer all the stored electricity to the light emitting device 110 in a very short time, so that the lamp beads in the light emitting device 110 can instantly reach a brightness more than four times that of the normal working state, so as to achieve the flash effect of the existing xenon flash. At the same time, the flash energy of the light emitting device 110 can be further controlled by the first flash control circuit 130, that is, while controlling the light emitting device 110 to emit a flash, the flash energy emitted by the light emitting device 110 can also be controlled. Fig.12 , Fig.12 is a schematic diagram of the second flash control circuit.

[0090] Embodiment 9

[0091] In some embodiments, the light emitting device 110 may include one or more LED light groups, and each LED light group may be controlled by a second flash control circuit. That is, the number of LED light groups is set to be the same as the number of second flash control circuits, so that each second flash control circuit is electrically connected to a corresponding LED light group. Fig.13 , Fig.13 Schematic diagram of the circuit principle of the LED flashlight provided in the ninth embodiment of the present application. Fig.13As shown, the LED flashlight includes multiple groups of LED light groups, namely LED light group 1, LED light group 2, LED light group 3, ..., LED light group n, and the multiple groups of LED light groups are connected in parallel. The LED flashlight includes multiple first flash control circuits, namely first flash control circuit 1, first flash control circuit 2, first flash control circuit 3, ..., first flash control circuit n. Wherein, each group of LED light groups is connected to a first flash control circuit, that is, each group of LED light groups is controlled by a first flash control circuit. The LED flashlight includes multiple second flash control circuits, namely second flash control circuit 1, second flash control circuit 2, second flash control circuit 3, ..., second flash control circuit n. Wherein, each group of LED light groups is connected to a second flash control circuit, that is, each group of LED light groups can also be controlled by a second flash control circuit. Wherein, multiple LED light groups can share a capacitor energy storage circuit, that is, each group of LED light groups is driven by a corresponding second flash control circuit to provide luminous energy for the shared capacitor energy storage circuit.

[0092] It should be noted that one or more LED light groups may also share a second flash control circuit, that is, each LED light group is controlled by the same second flash control circuit. Multiple LED light groups may also share a capacitor energy storage circuit, that is, each LED light group is driven by the shared second flash control circuit to provide light-emitting energy for the shared capacitor energy storage circuit.

[0093] Embodiment 10

[0094] The light emitting device 110 may include one or more LED light groups, Fig.14 , Fig.14 FIG. 1 is a schematic diagram of the circuit principle of the LED flashlight provided in the tenth embodiment of the present application. Fig.14As shown, the LED flashlight includes multiple groups of LED light groups, namely LED light group 1, LED light group 2, LED light group 3, ..., LED light group n, and the multiple groups of LED light groups are connected in parallel. The LED flashlight includes multiple first flash control circuits, namely first flash control circuit 1, first flash control circuit 2, first flash control circuit 3, ..., first flash control circuit n. Among them, each group of LED light groups is correspondingly connected to a first flash control circuit, that is, each group of LED light groups is correspondingly controlled by a first flash control circuit. The LED flashlight includes multiple second flash control circuits, namely second flash control circuit 1, second flash control circuit 2, second flash control circuit 3, ..., second flash control circuit n. Among them, each group of LED light groups is correspondingly connected to a second flash control circuit, that is, each group of LED light groups can also be correspondingly controlled by a second flash control circuit. The LED flash light includes a plurality of capacitor energy storage circuits, namely, capacitor energy storage circuit 1, capacitor energy storage circuit 2, capacitor energy storage circuit 3, ..., capacitor energy storage circuit n. Each group of LED light groups is connected to a corresponding capacitor energy storage circuit, that is, each group of LED light groups is driven by a corresponding second flash control circuit to provide light-emitting energy for the corresponding capacitor energy storage circuit.

[0095] In the embodiment of the present application, each group of LED lights is controlled by a corresponding first flash control circuit and a corresponding second flash control circuit, respectively, and the LED light groups can be controlled to emit flashes of different colors or multiple different color temperatures or different color temperatures and color combinations, thereby meeting the needs of different flash effects in different shooting scenes.

[0096] Embodiment 11

[0097] In some embodiments, reference Fig.15 , Fig.15 Schematic diagram of the circuit principle of the LED flashlight provided in the eleventh embodiment of the present application. Fig.15 As shown, the LED flash includes a light-emitting device 110, a capacitor energy storage circuit 120 and a first flash control circuit 130. The light-emitting device 110 has at least two different light-emitting parameters, that is, the light-emitting device 110 can emit light of multiple different colors or multiple different color temperatures or different color temperatures and color combinations. The LED flash also includes a second flash control circuit 160, which is connected between the first end of the capacitor energy storage circuit 120 and the first end of the light-emitting device 110, and is used to control the capacitor energy storage circuit 120 to output a voltage to the LED light group 110. The LED flash also includes a charging circuit 170, which is connected to the second flash control circuit 160 and the capacitor energy storage circuit 120, respectively. The charging circuit 170 is used to charge the capacitor energy storage circuit 120 with a set charging voltage according to the charging control instruction sent by the second flash control circuit 160. Wherein, the circuit diagram of the charging circuit 170 refers to Fig.16 , Fig.16 1 is a schematic diagram of a charging circuit. The second flash control circuit 160 sends a charging control instruction to the charging circuit 170, and the charging circuit 170 charges the capacitor energy storage circuit 120. The charging voltage of the capacitor energy storage circuit 120 is determined by the charging control instruction of the second flash control circuit 160. When it is necessary to generate a high-power flash, the second flash control circuit 160 drives the capacitor energy storage circuit 120 to transfer all the stored electricity to the light-emitting device 110 in a very short time, so that the lamp beads in the light-emitting device 110 can instantly reach more than four times the brightness of its normal operation, so as to achieve the flash effect of the existing xenon flash lamp. At the same time, the flash energy of the light-emitting device 110 can be further controlled by the first flash control circuit 130, that is, while controlling the light-emitting device 110 to emit a flash, the light-emitting device 110 can also be controlled to emit flashes of different colors or multiple different color temperatures or different color temperatures and color combinations.

[0098] Embodiment 12

[0099] In some embodiments, reference Fig.17 , Fig.17 Schematic diagram of the circuit principle of the LED flashlight provided in the twelfth embodiment of the present application. Fig.17As shown, the LED flash includes a light emitting device 110, a capacitor energy storage circuit 120 and a first flash control circuit 130. The light emitting device 110 has at least two different light emitting parameters, that is, the light emitting device 110 can emit light of multiple different colors or multiple different color temperatures or different color temperatures and color combinations. The LED flash also includes a second flash control circuit 160, which is connected between the first end of the capacitor energy storage circuit 120 and the first end of the light emitting device 110, and is used to control the capacitor energy storage circuit 120 to output a voltage to the LED light group 110. The LED flash also includes a charging circuit 170, which is connected to the second flash control circuit 160 and the capacitor energy storage circuit 120 respectively. The charging circuit 170 is used to charge the capacitor energy storage circuit 120 with a set charging voltage according to the charging control instruction sent by the second flash control circuit 160. The LED flash light also includes a boost circuit 180, one end of which is used to connect to the power supply voltage, and the other end of which is connected to the charging circuit 170. The boost circuit 180 is used to boost the power supply voltage and then input it into the charging circuit 170. The boost circuit 180 uses electronic components such as a bootstrap boost diode and a bootstrap boost capacitor to superimpose the capacitor discharge voltage and the power supply voltage, thereby increasing the voltage. The voltage increased by some circuits can reach several times the power supply voltage. That is, the boost circuit 180 can provide a higher voltage to the charging circuit 170, so that the charging circuit 170 can provide a higher voltage to the capacitor energy storage circuit 120, so that the capacitor energy storage circuit 120 can quickly store more electrical energy. The second flash control circuit 160 sends a charging control instruction to the charging circuit 170, and the charging circuit 170 charges the capacitor energy storage circuit 120; wherein, the charging voltage of the capacitor energy storage circuit 120 is determined by the charging control instruction of the second flash control circuit 160. When a high-power flash is required, the second flash control circuit 160 drives the capacitor energy storage circuit 120 to transfer all the stored electricity to the light emitting device 110 in a very short time, so that the lamp beads in the light emitting device 110 can instantly reach a brightness more than four times that of normal operation, so as to achieve the flash effect of the existing xenon flash lamp. At the same time, the flash energy of the light emitting device 110 can be further controlled by the first flash control circuit 130, that is, while controlling the light emitting device 110 to emit flash, it can also control the light emitting device 110 to emit flashes of different colors or multiple different color temperatures or different color temperatures and color combinations.

[0100] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0101] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0102] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0103] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0104] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0105] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0106] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0107] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0108] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0109] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including multiple instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store programs.

[0110] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. An LED flashlight, characterized in that: include: A light emitting device, comprising a first light emitting unit and a second light emitting unit, wherein the first light emitting unit and the second light emitting unit have different light emitting parameters; A capacitor energy storage circuit, wherein a first end of the capacitor energy storage circuit is electrically connected to a first end of the light emitting device, a second end of the capacitor energy storage circuit is grounded, and the first end of the capacitor energy storage circuit is also used to access a power supply voltage; The first flash control circuit is electrically connected to the light emitting device and is used to control the flash energy of the light emitting device.

2. The LED flash lamp according to claim 1, characterized in that: The first flash control circuit comprises: An NMOS switch tube, wherein the gate of the NMOS switch tube is electrically connected to a PWM control signal, the source of the NMOS switch tube is grounded, and the PWM control signal is used to control the flash energy of the light emitting device; A freewheeling diode, wherein the input end of the freewheeling diode is electrically connected to the drain of the NMOS switch tube, and the output end of the freewheeling diode is electrically connected to the first end of the light emitting device; A choke inductor, one end of which is electrically connected to the second end of the light emitting device, and the other end of which is electrically connected to the input end of the freewheeling diode and the drain of the NMOS switch tube.

3. The LED flash lamp according to claim 2, characterized in that: The first flash control circuit further includes a PWM controller, which is electrically connected to the gate of the NMOS switch tube and is used to adjust and output the PWM control signal.

4. The LED flash lamp according to claim 3, characterized in that: The first flash control circuit also includes a protection circuit, which is connected between the PWM controller and the gate of the NMOS switch tube. The protection circuit includes a first resistor and a first diode. The first resistor and the first diode are connected in parallel, and the input end of the first diode is connected to the gate of the NMOS switch tube, and the output end of the first diode is connected to the PWM controller.

5. The LED flash lamp according to claim 1, characterized in that: The light emitting device comprises one or more groups of LED lamp groups, each group of the LED lamp groups comprises one lamp bead or a plurality of lamp beads connected in series in sequence, and the LED lamp groups of each group are connected in parallel.

6. The LED flash lamp according to claim 5, characterized in that: The lamp beads contained in each group of the LED lamp groups include single-color lamp beads with single temperature or multi-color lamp beads or multi-color temperature lamp beads or multi-color temperature and multi-color combination lamp beads.

7. The LED flash lamp according to claim 5, characterized in that: The number of the LED light groups is the same as the number of the first flash control circuits, and each of the first flash control circuits is electrically connected to a corresponding group of the LED light groups.

8. The LED flash lamp according to claim 5, characterized in that: The number of the LED light groups is the same as the number of the capacitor energy storage circuits, and each of the capacitor energy storage circuits is electrically connected to a corresponding group of the LED light groups.

9. The LED flash lamp according to claim 5, characterized in that: The LED flash lamp further comprises a second flash control circuit connected between the first end of the capacitor energy storage circuit and the first end of the light emitting device, and the second flash control circuit is used to control the capacitor energy storage circuit to output voltage to the light emitting device.

10. The LED flash lamp according to claim 9, characterized in that: The number of the LED light groups is the same as the number of the second flash control circuits, and each of the second flash control circuits is electrically connected to a corresponding group of the LED light groups; or, a plurality of the LED light groups share one second flash control circuit.

11. The LED flash lamp according to claim 9, characterized in that: The LED flash light also includes a charging circuit, which is connected to the second flash control circuit and the capacitor energy storage circuit respectively, and is used to charge the capacitor energy storage circuit with a set charging voltage according to a charging control instruction sent by the second flash control circuit.

12. The LED flash lamp according to claim 11, characterized in that: The LED flash light also includes a boost circuit, one end of which is used to connect to a power supply voltage, and the other end of which is connected to the charging circuit. The boost circuit is used to boost the power supply voltage and then input it into the charging circuit.

13. The LED flashlight according to any one of claims 5 to 12, characterized in that: The LED flash lamp also includes: A constant light control module, the constant light control module is connected to one or more groups of the LED light groups, and is used to drive the connected LED light groups with a rated voltage; A main control module, wherein the main control module is connected to the first flash control circuit and the constant light control module respectively, and is used to selectively send a control instruction to the first flash control circuit or the constant light control module.

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