CN211831272U - Control circuit of LED flash type multipurpose illuminating lamp for shooting - Google Patents
Control circuit of LED flash type multipurpose illuminating lamp for shooting Download PDFInfo
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- CN211831272U CN211831272U CN202020200260.4U CN202020200260U CN211831272U CN 211831272 U CN211831272 U CN 211831272U CN 202020200260 U CN202020200260 U CN 202020200260U CN 211831272 U CN211831272 U CN 211831272U
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Abstract
A control circuit of an LED flash type multipurpose illuminating lamp for shooting. The utility model relates to a solve prior art and have power consumptive great, portable power module's electric energy persistence is poor, the more complicated scheduling problem of circuit structure. The technical points are as follows: the LED constant current source circuit is characterized by comprising a power supply module, a controllable booster circuit, a capacitor energy storage circuit, an LED light source module and an adjustable constant current source circuit which are sequentially connected according to the current flowing direction, and further comprising a control circuit which is respectively in control connection with the controllable booster circuit and the adjustable constant current source circuit, wherein when the controllable booster circuit is controlled to boost, boost electric quantity in a flash mode can be transmitted to the capacitor energy storage circuit, when the controllable booster circuit is controlled not to boost, non-boost electric quantity in a normally bright mode can be transmitted to the capacitor energy storage circuit, the adjustable constant current source circuit adjusts the flash or normally bright brightness of the LED light source module by controlling the limited current throughput, and the control circuit is used for sending control signals to the controllable booster circuit and the adjustable constant current source circuit.
Description
Technical Field
The utility model relates to a lighting lamp circuit, especially a shoot with multi-purpose light control circuit of LED flash type.
Background
Present shooting is with LED flash type multi-purpose light control circuit, like the photographic LED flash light of using that has chinese utility model patent No. 201920840344.1, the structure includes power module, flash control module and the LED banks of connecting according to electric current circulation direction order, flash control module includes: the capacitive energy storage circuit is used for storing electric energy; the charging circuit and the charging circuit are respectively connected with the power supply module and the capacitive energy storage circuit and are used for charging the capacitive energy storage circuit at a set charging voltage according to a charging control instruction, and the maximum value of the charging voltage is greater than the rated voltage of the LED lamp bank; the flash control circuit is respectively connected with the charging circuit and the capacitive energy storage circuit and is used for sending a charging control instruction to the charging circuit or controlling the capacitive energy storage circuit to output voltage to the LED lamp bank; the signal input module is used for inputting a control signal; the normally-on control module is connected with the LED lamp bank and used for driving the LED lamp bank at rated voltage; the main control module is respectively connected with the power supply module, the flashing control module, the normally-on control module and the signal input module and used for selectively sending a control instruction to the flashing control module or the normally-on control module according to an input control signal. The disadvantages of this solution: firstly, a high-voltage power supply must be adopted to meet the high-voltage requirement of flashing, but when flashing or normally bright dimming and voltage reduction are carried out, the flashing or normally bright dimming and voltage reduction must be achieved by discharging part of electric energy, so that the power consumption is high, and the electric energy durability of a portable power supply module is poor; secondly, because the flashing and the constant brightness are divided into two different paths of control, the circuit structure is relatively complex.
Disclosure of Invention
Exist power consumptive great in order to overcome prior art, portable power module's electric energy persistence is poor, the more complicated problem of circuit structure, the utility model aims at providing a LED flash type multipurpose lighting lamp control circuit is used in modified shooting, can overcome prior art's defect.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a shoot with multi-purpose light control circuit of LED flash type, characterized by: including the power module, controllable boost circuit, electric capacity tank circuit, LED light source module and the adjustable constant current source circuit who connects according to the current flow direction order, still include respectively with controllable boost circuit with adjustable constant current source circuit carries out control connection's control circuit, wherein controllable boost circuit when controlled boost, alright to electric capacity tank circuit carries the boost electric quantity of flash mode, controllable boost circuit when controlled not boost, alright to electric capacity tank circuit carries the not boost electric quantity of normal bright mode, adjustable constant current source circuit adjusts through controlled restriction current throughput the luminance of flashing or normal bright of LED light source module, control circuit be used for to controllable boost circuit with adjustable constant current source circuit sends control signal.
The power module in the technical scheme can adopt a power adapter or a portable battery.
The controllable boost circuit in the technical scheme can be formed by correspondingly connecting an inductor, a field effect transistor, a diode, a capacitor and a resistor, boost energy collection is carried out through the inductor, and boost control of the inductor is carried out through the conduction or the cut-off of the field effect transistor.
The capacitor energy storage circuit can be formed by connecting a plurality of capacitors in parallel.
According to the technical scheme, the LED light source module can be various LED lamp bead strings, COB modules or the like.
The adjustable constant current source circuit can be formed by correspondingly connecting a first-stage integrated operational amplifier, a second-stage integrated operational amplifier, a triode, a diode, a capacitor and a resistor, wherein a control signal of the current throughput of the adjustable constant current source circuit is input from the positive input end of the first-stage integrated operational amplifier, a control signal of the flash or constant-brightness conversion of the adjustable constant current source circuit is input from the negative input end of the first-stage integrated operational amplifier, a voltage sampling loop in the adjustable constant current source circuit transmits a sampling voltage to a circuit between the first-stage integrated operational amplifier and the second-stage integrated operational amplifier, and the flash current or the constant-brightness continuous dimming of the LED light source module is controlled by comparing the operational amplifier of the first-stage integrated operational amplifier and the second-stage integrated operational amplifier.
According to the technical scheme, the triode can be or comprise a power triode, and the power triode can be a Darlington transistor, a field effect transistor or an IGBT power module and the like.
The utility model has the advantages that: firstly, because the controllable booster circuit is used for boosting voltage in a controlled manner when the flash charging is carried out, the power module does not need to adopt higher voltage, and does not need to discharge part of electric energy when the flash or normal-brightness dimming decompression is carried out, so that electricity is saved, and the electric energy durability of the portable power module can be effectively improved; and secondly, the flash mode and the normally-on mode are controlled by the same way, and the circuit structure is simpler.
The invention is further described with reference to the following figures and examples.
Drawings
Fig. 1 is a circuit block diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a circuit of fig. 1.
Detailed Description
Referring to fig. 1, this shoot with multi-purpose light control circuit of LED flash type, characterized by: including the power module, controllable boost circuit, electric capacity tank circuit, LED light source module and the adjustable constant current source circuit who connects according to the current flow direction order, still include respectively with controllable boost circuit with adjustable constant current source circuit carries out control connection's control circuit, wherein controllable boost circuit when controlled boost, alright to electric capacity tank circuit carries the boost electric quantity of flash mode, controllable boost circuit when controlled not boost, alright to electric capacity tank circuit carries the not boost electric quantity of normal bright mode, adjustable constant current source circuit adjusts through controlled restriction current throughput the luminance of flashing or normal bright of LED light source module, control circuit be used for to controllable boost circuit with adjustable constant current source circuit sends control signal.
Referring to fig. 2, a schematic circuit diagram of fig. 1 includes, connected in order in the direction of current flow: a power supply module VIN; the controllable booster circuit is formed by correspondingly connecting an inductor L, a field effect transistor Q1, diodes D1-D3, capacitors C1 and C2 and resistors R1-R7; the capacitor energy storage circuit is formed by connecting a plurality of capacitors C3-C7 in parallel; the LED light source module consists of a plurality of LED light sources D4-D9; the adjustable constant current source circuit is formed by correspondingly connecting a first-stage integrated operational amplifier IC1, a second-stage integrated operational amplifier IC2, triodes Q2 and Q3, diodes D10-D13, capacitors C8 and C9 and resistors R8-R18. The control circuit is characterized by further comprising a control circuit which is not shown, and a control signal output end of the control circuit is respectively connected with a driving signal input end EXT of the controllable booster circuit, a constant-current charging control booster signal input end FB, an overvoltage protection signal input end OVP, an overcurrent protection signal input end CS, a constant-current magnitude control signal input end IREF of the adjustable constant-current source circuit, and a flash or constant-light MODE conversion control signal input end MODE.
The controllable booster circuit performs boosting and energy gathering through the inductor L, energy on the inductor L is superposed with energy of the power supply module VIN, and high-voltage charging energy for a flash mode is transmitted to the capacitive energy storage circuit; the controllable boosting circuit realizes the boosting control of the inductor L through the turning-on or turning-off of the field effect transistor Q1.
The adjustable constant current source circuit is a control signal of the current throughput of the adjustable constant current source circuit input from the positive input end IREF of the first-stage integrated operational amplifier IC1, and a control signal of the flash MODE or the normal-bright MODE conversion of the adjustable constant current source circuit is input from the negative input end MODE of the first-stage integrated operational amplifier IC 1; a voltage sampling loop R16 in the adjustable constant current source circuit transmits sampling voltage to a circuit between a first-stage integrated operational amplifier IC1 and a second-stage integrated operational amplifier IC2, and the flash current or the constant-brightness continuous dimming of the LED light source module is controlled through the operational amplifier comparison of the first-stage integrated operational amplifier IC1, the second-stage integrated operational amplifier IC1 and the IC 2.
When the flash controller is used, in a flash mode, the control circuit controls the conduction of a field effect transistor Q1 through a driving signal input end EXT of the controllable booster circuit, the current of a power supply module VIN forms a loop to the ground through the inductors L, R2 and R3, electric energy is converted into magnetic energy to be stored in the inductor L, when the control circuit controls the cut-off of the field effect transistor Q1, the inductor L generates induction voltage, the left side, the negative side, the right side and the positive side are connected with the power supply module VIN in series, and capacitors C3-C7 of the capacitor energy storage circuit are charged through D1 and D2, so that the capacitors C3-C7 obtain higher voltage than the power supply module VIN to; when the control circuit inputs a flash synchronizing signal to a constant current magnitude control signal input end IREF of the adjustable constant current source circuit, a loop formed by a first-stage integrated operational amplifier IC1, a second-stage integrated operational amplifier IC2, triodes Q2, Q3, R12, R17 and R18 of the adjustable constant current source circuit is conducted, electric energy stored in capacitors C3-C7 is discharged to the ground through LED light sources D4-D9, Q3, R17 and R18 of the LED light source module, and the LED light sources D4-D9 complete one-time flash. Meanwhile, the voltage sampling loop R16 samples the voltages on the R17 and the R18, the sampled voltages are transmitted to a circuit between the first-stage integrated operational amplifier IC1 and the second-stage integrated operational amplifier IC2, and the currents are limited in a set state through operational amplifier comparison, so that the situation that the currents are not controlled when the capacitors C3-C7 discharge and the LED light sources D4-D9 are damaged is avoided.
When the normally-on MODE is needed, the control circuit controls the flash MODE to be changed into the normally-on MODE through the flash or normally-on MODE conversion control signal input end MODE of the controllable booster circuit; then the control circuit controls a field effect transistor Q1 to be cut off through a driving signal input end EXT of the controllable booster circuit, the current of the power supply module VIN directly charges capacitors C3-C7 of the capacitor energy storage circuit through inductors L, D1 and D2, and the voltages on the capacitors C3-C7 are slightly lower than the voltage of the power supply module VIN; when the control circuit inputs a normally-on synchronous signal to the constant current magnitude control signal input end IREF of the adjustable constant current source circuit, a loop formed by a first-stage integrated operational amplifier IC1, a second-stage integrated operational amplifier IC2, triodes Q2, Q3, R12, R17 and R18 of the adjustable constant current source circuit is conducted, electric energy stored in capacitors C3-C7 forms a loop to the ground through LED light sources D4-D9, Q3, R17 and R18 of the LED light source module, and the LED light sources D4-D9 are enabled to emit light normally-on. Meanwhile, the voltage sampling loop R16 samples the voltages on the R17 and the R18, the sampled voltages are transmitted to a circuit between the first-stage integrated operational amplifier IC1 and the second-stage integrated operational amplifier IC2, and the current is changed within a set range through operational amplifier comparison, so that the continuous dimming of the LED light sources D4-D9 is achieved.
Claims (1)
1. The utility model provides a shoot with multi-purpose light control circuit of LED flash type, characterized by: including the power module, controllable boost circuit, electric capacity tank circuit, LED light source module and the adjustable constant current source circuit who connects according to the current flow direction order, still include respectively with controllable boost circuit with adjustable constant current source circuit carries out control connection's control circuit, wherein controllable boost circuit when controlled boost, alright to electric capacity tank circuit carries the boost electric quantity of flash mode, controllable boost circuit when controlled not boost, alright to electric capacity tank circuit carries the not boost electric quantity of normal bright mode, adjustable constant current source circuit adjusts through controlled restriction current throughput the luminance of flashing or normal bright of LED light source module, control circuit be used for to controllable boost circuit with adjustable constant current source circuit sends control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020200260.4U CN211831272U (en) | 2020-02-24 | 2020-02-24 | Control circuit of LED flash type multipurpose illuminating lamp for shooting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020200260.4U CN211831272U (en) | 2020-02-24 | 2020-02-24 | Control circuit of LED flash type multipurpose illuminating lamp for shooting |
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| CN211831272U true CN211831272U (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020200260.4U Active CN211831272U (en) | 2020-02-24 | 2020-02-24 | Control circuit of LED flash type multipurpose illuminating lamp for shooting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117440555A (en) * | 2023-12-20 | 2024-01-23 | 杭州方千科技有限公司 | Circuit for controlling LED stroboscopic explosion and light supplementing device |
-
2020
- 2020-02-24 CN CN202020200260.4U patent/CN211831272U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117440555A (en) * | 2023-12-20 | 2024-01-23 | 杭州方千科技有限公司 | Circuit for controlling LED stroboscopic explosion and light supplementing device |
| CN117440555B (en) * | 2023-12-20 | 2024-03-05 | 杭州方千科技有限公司 | Circuit for controlling LED stroboscopic explosion and light supplementing device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220324 Address after: 515829 Guangdong Nanguang film and television equipment Co., Ltd. on the east side of Zhangdong passenger station of National Highway 324, Dongli Town, Chenghai District, Shantou City, Guangdong Province Patentee after: Guangdong Nanguang television equipment Co.,Ltd. Address before: 515829 Guangdong province Shantou Chenghai District Dongli Town Road 324 Zhang Lin Road South Light Television Equipment Co., Ltd. Patentee before: Lin Biguang |
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| TR01 | Transfer of patent right |