CN204090260U - A kind of LED acousto-optic control drive circuit - Google Patents
A kind of LED acousto-optic control drive circuit Download PDFInfo
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- CN204090260U CN204090260U CN201420672541.4U CN201420672541U CN204090260U CN 204090260 U CN204090260 U CN 204090260U CN 201420672541 U CN201420672541 U CN 201420672541U CN 204090260 U CN204090260 U CN 204090260U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a kind of LED acousto-optic control drive circuit, comprises driving power circuit harmony optically controlled delay circuit, and driving power circuit is former limit reaction type constant current driver circuit for LED, and circuit is simple, can export constant current; The power output end of driving power circuit is connected with the power input of acoustooptic controlled delay circuit, optically controlled delay circuit comprises acoustic signal sensor, signal amplification circuit, phototriode, monostable flipflop and thyristor, acoustooptic controlled delay circuit carries out open and close delays time to control to LED light source, circuit is simple, the components and parts used are few, and volume is little, can realize the controlled by sound and light to LED lamp, and accurate delay timing: by day, control LED lamp and extinguish; At night, when people is through sending the sound, controlling LED lamp and automatically lighting, and after extending certain hour, control light fixture automatic distinguishing; Energy savings, easy to use.
Description
Technical field
The utility model relates to field of LED drive, particularly a kind of LED acousto-optic control drive circuit.
Background technology
LED illumination is a kind of new type light source of rapid rising development in recent years, and its many good feature makes its application surface more and more wider.Because the light fixture being arranged on the positions such as corridor, corridor, lavatory does not need long opening, as long-time unlatching, can energy waste be caused, and just need when there being people to enter automatically to open, so there is responding to the extraneous sound to allow the acousto-optic control lamp of current turns ON or disconnection.The existing light fixture with sound light control functionality is traditional incandescent lamp, unilateal conduction characteristic due to LED makes LED must be equipped with LED drive circuit could to work, therefore how light control functionality is applied in LED lamp, and simplify its circuit, be technical problem to be solved in the utility model.
Utility model content
Main purpose of the present utility model is to provide a kind of LED acousto-optic control drive circuit, be intended to simplify circuit, realize the sound light control functionality of LED lamp, constant current can be exported, intelligent-induction environment bright secretly changes, and respond to the extraneous sound to control LED light source bright, go out, accurate delay timing, easy to use.
The utility model proposes a kind of LED acousto-optic control drive circuit, comprise driving power circuit harmony optically controlled delay circuit, described driving power circuit is former limit reaction type constant current driver circuit for LED, comprise current rectifying and wave filtering circuit, the power transformer T1 be connected with the output of described current rectifying and wave filtering circuit and former limit and feed back LED constant current driving chip IC1, the output of described former limit feedback LED constant current driving chip IC1 is connected with the input of described power transformer T1, and the output of described power transformer T1 is the power output end of described driving power circuit; The power output end of described driving power circuit is connected with the power input of described acoustooptic controlled delay circuit.
Described acoustooptic controlled delay circuit comprises acoustic signal sensor HTD, signal amplification circuit, phototriode VT3, monostable flipflop and thyristor VS, described signal amplification circuit comprises first order amplifying triode VT1, second level amplifying triode VT2 and the first regulator potentiometer RP1, the output of described acoustic signal sensor HTD is connected to the base stage of described first order amplifying triode VT1 by the first coupling capacitance C8, the base stage of described second level amplifying triode VT2 is connected with the collector electrode of described first order amplifying triode VT1, after acoustic signal sensor HTD changes the acoustical signal received into the signal of telecommunication, the base stage of first order amplifying triode VT1 is added to by the first coupling capacitance C8, amplify through signal amplification circuit.Described first regulator potentiometer RP1 is connected between the base stage of described first order amplifying triode VT1 and the transmitting collection of described second level amplifying triode VT2, first regulator potentiometer RP1 is as the negative-feedback regu-lation potentiometer of signal amplification circuit, be used for the feedback intensity of conditioning signal amplifying circuit, make signal amplification circuit have enough large multiplication factor, can stably work again.
The collector electrode of described phototriode VT3 is connected between the collector electrode of described first order amplifying triode VT1 and the base stage of described second level amplifying triode VT2, the transmitting collection earth connection of described phototriode VT3.Phototriode VT3 forms light-operated circuit, by day, because illumination is stronger, the complete conducting of phototriode VT3, make the signal adding to second level amplifying triode VT2 base stage by phototriode VT3 ground connection, second level amplifying triode VT2 no-output, make circuit not by the triggering of acoustical signal; And night, illumination weakens, and phototriode VT3 ends, and second level amplifying triode VT2 normally exports, and circuit enters normal operating conditions.
The RC timing circuit that described monostable flipflop comprises NE555 chip IC 2 and is made up of timing capacitor C11 and timing resistor R14, power output end described in one termination of described timing resistor R14, the other end of described timing resistor R14 is connected with the positive pole of described timing capacitor C11, the minus earth line of described timing capacitor C11, delay time is determined by timing capacitor C11 and timing resistor R14, is about 60s.。1 pin of described NE555 chip IC 2 is earth terminal, earth connection, 2 pin of described NE555 chip IC 2 are trigger input, the collector electrode of described second level amplifying triode VT2 is connected to described trigger input by the second coupling capacitance C9, after acoustic signal sensor HTD changes the acoustical signal received into the signal of telecommunication, the base stage of first order amplifying triode VT1 is added to by the first coupling capacitance C8, first order amplifying triode VT1 conducting, the signal of telecommunication is amplified and exports the base stage of the second amplifying triode VT2 to, make second level amplifying triode VT2 conducting, added to 2 pin of NE555 chip IC 2 by the second coupling capacitance C9 after the signal of telecommunication amplifies by second level amplifying triode VT2 again.3 pin of described NE555 chip IC 2 are output, 3 pin of described NE555 chip IC 2 are connected with the control pole of described thyristor VS through a resistance R15, the minus earth line of described thyristor VS, the anode of described thyristor VS is signal output part, is connected with controlled LED light source.
4 pin of described NE555 chip IC 2 are reset terminal, and 8 pin of described NE555 chip IC 2 are power voltage terminal, and 4 pin of described NE555 chip IC 2 and 8 pin connect the power output end of described driving power circuit jointly; 5 pin of described NE555 chip IC 2 are control end, with described earth terminal common ground line; 6 pin of described NE555 chip IC 2 are threshold value end, and 7 pin of described NE555 chip IC 2 are discharge end, and 6 pin and 7 pin of described NE555 chip IC 2 are attempted by described timing capacitor C11, are connected between described timing resistor R14 and described timing capacitor C11.
By day, even if acoustic signal sensor HTD exports the signal of telecommunication after receiving acoustical signal, when the signal of telecommunication that first order amplifying triode VT1 amplification exports exports to second level amplifying triode VT2, because illumination is stronger, the complete conducting of phototriode VT3, make the signal adding to second level amplifying triode VT2 base stage by phototriode VT3 ground connection, second level amplifying triode VT2 no-output, make circuit not by the triggering of acoustical signal; At night, illumination weakens, and phototriode VT3 ends, and second level amplifying triode VT2 normally exports, and second level amplifying triode VT2 normally exports, and circuit enters normal operating conditions.Phototriode VT3 control LED light source extinguish by day, at night, LED light source bright, go out by Sound control.
At night, when having people through sending the sound, acoustic signal sensor HTD changes the acoustical signal received into the signal of telecommunication, and the base stage of first order amplifying triode VT1 is added to by the first coupling capacitance C8, after signal amplification circuit amplifies, added to 2 pin of NE555 chip IC 2 by the second coupling capacitance C9, monostable flipflop is triggered upset by low level signal.After monostable flipflop upset, 3 pin of NE555 chip IC 2 export high level, and by resistance R15 by IGBT group conducting, LED light source lights.Simultaneously, power supply is charged to timing capacitor C11 by timing resistor R14, temporary stable state starts, after elapsed time TD, when the voltage rise on timing capacitor C11 is to >2/3VDD, monostable flipflop triggers upset again, 3 pin output low levels of NE555 chip IC 2, temporary stable state terminates, and thyristor turns off, and LED light source extinguishes.Wherein, time TD is the delay time that LED light source lights, and is set to 60s.
At the end of the temporary stable state of monostable flipflop, the electric charge on timing capacitor C11 is put into zero very soon, prepares for fixed response time time control next time makes.
Preferably, described acoustic signal sensor is piezoelectric ceramic piece HTD.
Preferably, the biasing circuit be made up of resistance R13 and the second regulator potentiometer RP2 is provided with at 2 pin of described NE555 chip IC 2, the one termination power output end of described resistance R13, the other end is connected with a stiff end of described second regulator potentiometer RP2, another stiff end earth connection of described second regulator potentiometer RP2,2 pin of NE555 chip IC 2 described in the slidable adjustment termination of described second regulator potentiometer RP2.Biasing circuit is to the suitable bias voltage of the 2 pin pre-add one of NE555 chip IC 2, and the trigger sensitivity that circuit can be made to keep higher, can prevent again extraneous interference.
Preferably, described acoustooptic controlled delay circuit comprises voltage stabilizing circuit, and described voltage stabilizing circuit comprises voltage stabilizing didoe D8 and electric capacity C6, the plus earth of described voltage stabilizing didoe D8, negative pole connects the power output end of described driving power circuit, and described electric capacity C6 is connected in parallel on described voltage stabilizing didoe D8 two ends.
Preferably, described former limit feedback LED constant current driving chip is BP9022A chip, inside comprises LED open loop protection circuit, LED short-circuit protection circuit, CS end resistive short protective circuit, power supply under-voltage protecting circuit and the overheated regulating circuit of chip temperature, 1 pin of described BP9022A chip is current sample end CS, meets sampling resistor R5 to ground wire; 2 pin of described BP9022A chip are chip power supply end VDD, are connected with the output of described current rectifying and wave filtering circuit; 3 pin of described BP9022A chip are earth terminal GND, earth connection; 4 pin of described BP9022A chip are that LED open-circuit-protection voltage arranges end ROVP, and connecting resistance R4 is to ground wire; 5 pin of described BP9022A chip and 6 pin are empty pin NC, and 7 pin of described BP9022A chip and 8 pin are internal high pressure power tube drain terminal DRAIN, i.e. output, connects the input of described power transformer.
Preferably, described driving power circuit also comprises drain electrode clamping protective circuit, described drain electrode clamping protective circuit is by clamp diode D5, clamp capacitor C4, clamp resistance R7, fast recovery diode D6 and damping electricity R8 resistance are formed, described clamp diode D5, described clamp capacitor C4 and described clamp resistance R7 is connected in parallel on the two ends of the primary coil of described power transformer T1, and be connected with the negative pole of described fast recovery diode D6 through described damping resistance R8, the positive pole of described fast recovery diode D6 is connected with the internal high pressure power tube drain terminal DRAIN of described BP9022A chip.
The effect of drain electrode clamping protective circuit is when the high-voltage power pipe of BP9022A chip internal turns off; clamper and absorption are carried out to the peak voltage formed by power transformer T1 leakage inductance, damages because of overvoltage to prevent the high-voltage power pipe of BP9022A chip internal.
The beneficial effect of a kind of LED acousto-optic control drive circuit of the present utility model is:
1, former limit reaction type constant current driver circuit for LED is adopted to carry out constant current-supplying, the acoustooptic controlled delay circuit be made up of acoustic signal sensor, signal amplification circuit, phototriode, monostable flipflop and thyristor is adopted to carry out open and close delays time to control to LED light source, circuit is simple, the components and parts used are few, volume is little, the controlled by sound and light to LED lamp can be realized: by day, control LED lamp and extinguish; At night, when people is through sending the sound, controlling LED lamp and automatically lighting, and after extending certain hour, control light fixture automatic distinguishing, energy savings, easy to use.
2, monostable flipflop is triggered after upset and enters temporary stable state, and at this moment power supply is charged to timing capacitor by timing resistor, and the time needed for timing capacitor charging is the delay time of monostable flipflop, can realize accurate delay timing.
3, former limit reaction type constant current driver circuit for LED is adopted to carry out constant current-supplying, the feedback LED constant current driving chip inside, former limit used is integrated with 600V power switch, only need the constant-current characteristics that few peripheral assembly just can reach excellent, and have employed former limit feedback technique, without the need to optocoupler and TL431 feedback, also without the need to auxiliary winding power and detection, system cost is extremely low.
Former limit feedback LED constant current driving chip also has LED open circuit/short-circuit protection function, CS resistive short defencive function, VDD under-voltage protection function and the overheated regulatory function of chip temperature, can carry out multiple protective to whole circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED acousto-optic control drive circuit in the embodiment of a kind of LED acousto-optic control drive circuit of the present utility model;
Fig. 2 is the circuit diagram of driving power circuit in the embodiment of a kind of LED acousto-optic control drive circuit of the present utility model.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
See figures.1.and.2, one embodiment of a kind of LED acousto-optic control drive circuit of the present utility model is proposed, this LED acousto-optic control drive circuit comprises driving power circuit harmony optically controlled delay circuit, and driving power circuit is acoustooptic controlled delay circuit and LED light source circuit supply.This driving power circuit is former limit reaction type constant current driver circuit for LED, comprise current rectifying and wave filtering circuit, the power transformer T1 be connected with the output of current rectifying and wave filtering circuit and former limit and feed back LED constant current driving chip IC1, the output of former limit feedback LED constant current driving chip IC1 is connected with the input of power transformer T1, and the output of power transformer T1 is the power output end of driving power circuit.
This current rectifying and wave filtering circuit comprises the rectifier bridge and filter capacitor C1 that are made up of four diodes D1, D2, D3 and D4, and filter capacitor C1 is connected in parallel on the output of rectifier bridge.Connect after AC power, alternating current through fuse resistance R1 input rectifying bridge, after rectifier bridge rectification, then through filter capacitor C1 filtering, the direct current of output smoothing.Electric capacity C2 is also parallel with, for filter high-frequency AC signal at the two ends of filter capacitor C1.
This former limit feedback LED constant current driving chip IC1 is BP9022A chip, chip internal is integrated with 600V power switch, only need the constant-current characteristics that few peripheral assembly just can reach excellent, and have employed former limit feedback technique, without the need to optocoupler and TL431 feedback, also without the need to auxiliary winding power and detection, system cost is extremely low.
1 pin of BP9022A chip IC 1 is current sample end CS, meets sampling resistor R5 to ground wire; 2 pin of BP9022A chip IC 1 are chip power supply end VDD, are connected with the output of current rectifying and wave filtering circuit; 3 pin of BP9022A chip IC 1 are earth terminal GND, earth connection; 4 pin of BP9022A chip IC 1 are that LED open-circuit-protection voltage arranges end ROVP, and connecting resistance R4 is to ground wire; 5 pin of BP9022A chip IC 1 and 6 pin are 7 pin of empty pin NC, BP9022A chip IC 1 and 8 pin is internal high pressure power tube drain terminal DRAIN, i.e. output, connects the input of power transformer.
BP9022A chip IC 1 inside also comprises LED open loop protection circuit, LED short-circuit protection circuit, CS end resistive short protective circuit, power supply under-voltage protecting circuit and the overheated regulating circuit of chip temperature; there is LED open circuit/short-circuit protection function, CS resistive short defencive function, VDD under-voltage protection function and the overheated regulatory function of chip temperature, multiple protective can be carried out to whole circuit.
When exporting LED light source open circuit, BP9022A chip IC 1 system can trigger overvoltage relay protective scheme and shutdown switch work.When LED light source short circuit, system works is at 5KHz low frequency, and CS turns off threshold value and is reduced to 200mV, so power consumption is very low.When the situation of some exception occurs, the such as short circuit of CS sampling resistor or transformer T7 are saturated, and the quick detection circuit meeting trigger protection logic of chip internal, system is shutdown switch work at once.After system enters guard mode, vdd voltage starts to decline; When VDD arrives under-voltage protection threshold value, system will be restarted.Simultaneity factor constantly detects load condition, if trouble shooting, system can restart normal work.When driving power circuit is overheated, BP9022A chip IC 1 can reduce output current gradually, thus controls power output and temperature rise, makes power source temperature remain on set point, to improve the reliability of system.It is 150 DEG C that chip internal set thermal conditioning temperature spot.
This driving power circuit also comprises drain electrode clamping protective circuit; drain electrode clamping protective circuit is hindered by clamp diode D5, clamp capacitor C4, clamp resistance R7, fast recovery diode D6 and damping electricity R8 and forms; clamp diode D5, clamp capacitor C4 and clamp resistance R7 are connected in parallel on the two ends of the primary coil of power transformer T1; and be connected with the negative pole of fast recovery diode D6 through damping resistance R8, the positive pole of fast recovery diode D6 is connected with the internal high pressure power tube drain terminal DRAIN of BP9022A chip.The effect of drain electrode clamping protective circuit is when the high-voltage power pipe of BP9022A chip IC 1 inside turns off; clamper and absorption are carried out to the peak voltage formed by power transformer T1 leakage inductance, damages because of overvoltage to prevent the high-voltage power pipe of BP9022A chip internal.
The power output end of driving power circuit is connected with the power input of acoustooptic controlled delay circuit.This acoustooptic controlled delay circuit comprises acoustic signal sensor, signal amplification circuit, phototriode VT3, monostable flipflop and thyristor VS.Acoustic signal sensor is piezoelectric ceramic piece HTD, signal amplification circuit comprises first order amplifying triode VT1, second level amplifying triode VT2 and the first regulator potentiometer RP1, the output of acoustic signal sensor HTD is connected to the base stage of first order amplifying triode VT1 by the first coupling capacitance C8, the base stage of second level amplifying triode VT2 is connected with the collector electrode of first order amplifying triode VT1, after acoustic signal sensor HTD changes the acoustical signal received into the signal of telecommunication, the base stage of first order amplifying triode VT1 is added to by the first coupling capacitance C8, amplify through signal amplification circuit.First regulator potentiometer RP1 is connected between the base stage of first order amplifying triode VT1 and the transmitting collection of second level amplifying triode VT2, first regulator potentiometer RP1 is as the negative-feedback regu-lation potentiometer of signal amplification circuit, be used for the feedback intensity of conditioning signal amplifying circuit, make signal amplification circuit have enough large multiplication factor, can stably work again.
The collector electrode of phototriode VT3 is connected between the collector electrode of first order amplifying triode VT1 and the base stage of second level amplifying triode VT2, the transmitting collection earth connection of phototriode VT3.Phototriode VT3 forms light-operated circuit, by day, because illumination is stronger, the complete conducting of phototriode VT3, make the signal adding to second level amplifying triode VT2 base stage by phototriode VT3 ground connection, second level amplifying triode VT2 no-output, make circuit not by the triggering of acoustical signal; And night, illumination weakens, and phototriode VT3 ends, and second level amplifying triode VT2 normally exports, and circuit enters normal operating conditions.
The RC timing circuit that monostable flipflop comprises NE555 chip IC 2 and is made up of timing capacitor C11 and timing resistor R14, the one termination power output end of timing resistor R14, the other end of timing resistor R14 is connected with the positive pole of timing capacitor C11, the minus earth line of timing capacitor C11, delay time is determined by timing capacitor C11 and timing resistor R14, is about 60s.1 pin of NE555 chip IC 2 is earth terminal, earth connection, 2 pin of NE555 chip IC 2 are trigger input, the collector electrode of second level amplifying triode VT2 is connected to trigger input by the second coupling capacitance C9, after acoustic signal sensor HTD changes the acoustical signal received into the signal of telecommunication, the base stage of first order amplifying triode VT1 is added to by the first coupling capacitance C8, first order amplifying triode VT1 conducting, the signal of telecommunication is amplified and exports the base stage of the second amplifying triode VT2 to, make second level amplifying triode VT2 conducting, added to 2 pin of NE555 chip IC 2 by the second coupling capacitance C9 after the signal of telecommunication amplifies by second level amplifying triode VT2 again.3 pin of NE555 chip IC 2 are output, and 3 pin of NE555 chip IC 2 are connected with the control pole of thyristor VS through a resistance R15, the minus earth line of thyristor VS, and the anode of thyristor VS is signal output part, is connected with controlled LED light source.4 pin of NE555 chip IC 2 are reset terminal, and 8 pin of NE555 chip IC 2 are power voltage terminal, and 4 pin of NE555 chip IC 2 and 8 pin connect the power output end of driving power circuit jointly; 5 pin of NE555 chip IC 2 are control end, with earth terminal common ground line; 6 pin of NE555 chip IC 2 are threshold value end, and 7 pin of NE555 chip IC 2 are discharge end, and 6 pin and 7 pin of NE555 chip IC 2 are attempted by timing capacitor C11, are connected between timing resistor R14 and timing capacitor C11.
By day, even if acoustic signal sensor HTD exports the signal of telecommunication after receiving acoustical signal, when the signal of telecommunication that first order amplifying triode VT1 amplification exports exports to second level amplifying triode VT2, because illumination is stronger, the complete conducting of phototriode VT3, make the signal adding to second level amplifying triode VT2 base stage by phototriode VT3 ground connection, second level amplifying triode VT2 no-output, make circuit not by the triggering of acoustical signal; At night, illumination weakens, and phototriode VT3 ends, and second level amplifying triode VT2 normally exports, and second level amplifying triode VT2 normally exports, and circuit enters normal operating conditions.Phototriode VT3 control LED light source extinguish by day, at night, LED light source bright, go out by Sound control.
At night, when having people through sending the sound, acoustic signal sensor HTD changes the acoustical signal received into the signal of telecommunication, and the base stage of first order amplifying triode VT1 is added to by the first coupling capacitance C8, after signal amplification circuit amplifies, added to 2 pin of NE555 chip IC 2 by the second coupling capacitance C9, monostable flipflop is triggered upset by low level signal.After monostable flipflop upset, 3 pin of NE555 chip IC 2 export high level, and by resistance R15 by IGBT group conducting, LED light source lights.Simultaneously, power supply is charged to timing capacitor C11 by timing resistor R14, temporary stable state starts, after elapsed time TD, when the voltage rise on timing capacitor C11 is to >2/3VDD, monostable flipflop triggers upset again, 3 pin output low levels of NE555 chip IC 2, temporary stable state terminates, and thyristor turns off, and LED light source extinguishes.Wherein, time TD is the delay time that LED light source lights, and is set to 60s, can realize accurate delay timing.
At the end of the temporary stable state of monostable flipflop, the electric charge on timing capacitor C11 is put into zero very soon, prepares for fixed response time time control next time makes.
The biasing circuit be made up of resistance R13 and the second regulator potentiometer RP2 is provided with at 2 pin of NE555 chip IC 2, the one termination power output end of resistance R13, the other end is connected with a stiff end of the second regulator potentiometer RP2, another stiff end earth connection of second regulator potentiometer RP2,2 pin of the slidable adjustment termination NE555 chip IC 2 of the second regulator potentiometer RP2.Biasing circuit is to the suitable bias voltage of the 2 pin pre-add one of NE555 chip IC 2, and the trigger sensitivity that circuit can be made to keep higher, can prevent again extraneous interference.
Acoustooptic controlled delay circuit also comprises voltage stabilizing circuit, and voltage stabilizing circuit comprises voltage stabilizing didoe D8 and electric capacity C6, the plus earth of voltage stabilizing didoe D8, and negative pole connects the power output end of driving power circuit, and electric capacity C6 is connected in parallel on voltage stabilizing didoe D8 two ends.
This LED acousto-optic control drive circuit adopts former limit reaction type constant current driver circuit for LED to carry out constant current-supplying, the acoustooptic controlled delay circuit be made up of acoustic signal sensor HTD, signal amplification circuit, phototriode VT3, monostable flipflop and thyristor VS is adopted to carry out open and close delays time to control to LED light source, circuit is simple, the components and parts used are few, volume is little, the controlled by sound and light to LED lamp can be realized: by day, control LED lamp and extinguish; At night, when people is through sending the sound, controlling LED lamp and automatically lighting, and after extending certain hour, control light fixture automatic distinguishing, energy savings, easy to use.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure transformation utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. a LED acousto-optic control drive circuit, comprise driving power circuit harmony optically controlled delay circuit, it is characterized in that, described driving power circuit is former limit reaction type constant current driver circuit for LED, comprise current rectifying and wave filtering circuit, the power transformer be connected with the output of described current rectifying and wave filtering circuit and former limit and feed back LED constant current driving chip, the output of described former limit feedback LED constant current driving chip is connected with the input of described power transformer, and the output of described power transformer is the power output end of described driving power circuit; The power output end of described driving power circuit is connected with the power input of described acoustooptic controlled delay circuit;
Described acoustooptic controlled delay circuit comprises acoustic signal sensor, signal amplification circuit, phototriode, monostable flipflop and thyristor, described signal amplification circuit comprises first order amplifying triode, second level amplifying triode and the first regulator potentiometer, the output of described acoustic signal sensor is connected to the base stage of described first order amplifying triode by the first coupling capacitance, the base stage of described second level amplifying triode is connected with the collector electrode of described first order amplifying triode, described first regulator potentiometer is connected between the base stage of described first order amplifying triode and the transmitting collection of described second level amplifying triode, the collector electrode of described phototriode is connected between the collector electrode of described first order amplifying triode and the base stage of described second level amplifying triode, the transmitting collection earth connection of described phototriode,
The RC timing circuit that described monostable flipflop comprises NE555 chip and is made up of timing capacitor and timing resistor, power output end described in one termination of described timing resistor, the other end of described timing resistor is connected with the positive pole of described timing capacitor, the minus earth line of described timing capacitor; 1 pin of described NE555 chip is earth terminal, earth connection; 2 pin of described NE555 chip are trigger input, and the collector electrode of described second level amplifying triode is connected to described trigger input by the second coupling capacitance; 3 pin of described NE555 chip are output, and 3 pin of described NE555 chip are connected with the control pole of described thyristor through a resistance R15, the minus earth line of described thyristor, and the anode of described thyristor is signal output part, is connected with controlled LED light source; 4 pin of described NE555 chip are reset terminal, and 8 pin of described NE555 chip are power voltage terminal, and 4 pin of described NE555 chip and 8 pin connect the power output end of described driving power circuit jointly; 5 pin of described NE555 chip are control end, with described earth terminal common ground line; 6 pin of described NE555 chip are threshold value end, and 7 pin of described NE555 chip are discharge end, and 6 pin and 7 pin of described NE555 chip are attempted by described timing capacitor, are connected between described timing resistor and described timing capacitor.
2. a kind of LED acousto-optic control drive circuit according to claim 1, it is characterized in that, described acoustic signal sensor is piezoelectric ceramic piece HTD.
3. a kind of LED acousto-optic control drive circuit according to claim 1, it is characterized in that, the biasing circuit be made up of resistance R13 and the second regulator potentiometer RP2 is provided with at 2 pin of described NE555 chip, the one termination power output end of described resistance R13, the other end is connected with a stiff end of described second regulator potentiometer RP2, another stiff end earth connection of described second regulator potentiometer RP2,2 pin of NE555 chip described in the slidable adjustment termination of described second regulator potentiometer RP2.
4. a kind of LED acousto-optic control drive circuit according to claim 1 or 3, it is characterized in that, described acoustooptic controlled delay circuit comprises voltage stabilizing circuit, described voltage stabilizing circuit comprises voltage stabilizing didoe D8 and electric capacity C6, the plus earth of described voltage stabilizing didoe D8, negative pole connects the power output end of described driving power circuit, and described electric capacity C6 is connected in parallel on described voltage stabilizing didoe D8 two ends.
5. a kind of LED acousto-optic control drive circuit according to claim 1, it is characterized in that, described former limit feedback LED constant current driving chip is BP9022A chip, inside comprises LED open loop protection circuit, LED short-circuit protection circuit, CS end resistive short protective circuit, power supply under-voltage protecting circuit and the overheated regulating circuit of chip temperature, 1 pin of described BP9022A chip is current sample end CS, meets sampling resistor R5 to ground wire; 2 pin of described BP9022A chip are chip power supply end VDD, are connected with the output of described current rectifying and wave filtering circuit; 3 pin of described BP9022A chip are earth terminal GND, earth connection; 4 pin of described BP9022A chip are that LED open-circuit-protection voltage arranges end ROVP, and connecting resistance R4 is to ground wire; 5 pin of described BP9022A chip and 6 pin are empty pin NC, and 7 pin of described BP9022A chip and 8 pin are internal high pressure power tube drain terminal DRAIN, i.e. output, connects the input of described power transformer.
6. a kind of LED acousto-optic control drive circuit according to claim 5, it is characterized in that, described driving power circuit also comprises drain electrode clamping protective circuit, described drain electrode clamping protective circuit is by clamp diode, clamp capacitor, clamp resistance, fast recovery diode and damping resistance are formed, described clamp diode, described clamp capacitor and described clamp resistance are connected in parallel on the two ends of the primary coil of described power transformer, and be connected through the negative pole of described damping resistance with described fast recovery diode, the positive pole of described fast recovery diode is connected with the internal high pressure power tube drain terminal DRAIN of described BP9022A chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420672541.4U CN204090260U (en) | 2014-11-12 | 2014-11-12 | A kind of LED acousto-optic control drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420672541.4U CN204090260U (en) | 2014-11-12 | 2014-11-12 | A kind of LED acousto-optic control drive circuit |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508277A (en) * | 2015-12-19 | 2016-04-20 | 成都川通达科技有限公司 | Protective type voltage-stabilizing intelligent ventilation system of underground parking garage |
| CN106545783A (en) * | 2016-08-31 | 2017-03-29 | 贺叶青 | Dull and stereotyped lamp of LED of built-in drive |
| CN106545784A (en) * | 2016-08-31 | 2017-03-29 | 唐艳军 | The LED projector lamp of constant-current driving |
| CN106545798A (en) * | 2016-08-31 | 2017-03-29 | 陈磊 | The LED lamp affixed to the ceilings of constant-current driving |
| CN106545780A (en) * | 2016-08-31 | 2017-03-29 | 罗莉君 | A kind of LED desk lamp of stable luminescence |
| CN106560645A (en) * | 2016-08-31 | 2017-04-12 | 陈磊 | Strobe-free LED ceiling lamp |
| CN108233718A (en) * | 2018-01-29 | 2018-06-29 | 新日(无锡)发展有限公司 | A kind of inverse-excitation type switch power-supply for accumulator |
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2014
- 2014-11-12 CN CN201420672541.4U patent/CN204090260U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508277A (en) * | 2015-12-19 | 2016-04-20 | 成都川通达科技有限公司 | Protective type voltage-stabilizing intelligent ventilation system of underground parking garage |
| CN106545783A (en) * | 2016-08-31 | 2017-03-29 | 贺叶青 | Dull and stereotyped lamp of LED of built-in drive |
| CN106545784A (en) * | 2016-08-31 | 2017-03-29 | 唐艳军 | The LED projector lamp of constant-current driving |
| CN106545798A (en) * | 2016-08-31 | 2017-03-29 | 陈磊 | The LED lamp affixed to the ceilings of constant-current driving |
| CN106545780A (en) * | 2016-08-31 | 2017-03-29 | 罗莉君 | A kind of LED desk lamp of stable luminescence |
| CN106560645A (en) * | 2016-08-31 | 2017-04-12 | 陈磊 | Strobe-free LED ceiling lamp |
| CN108233718A (en) * | 2018-01-29 | 2018-06-29 | 新日(无锡)发展有限公司 | A kind of inverse-excitation type switch power-supply for accumulator |
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