CN207518907U - Light sensation control circuit based on LED drive power - Google Patents
Light sensation control circuit based on LED drive power Download PDFInfo
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- CN207518907U CN207518907U CN201721601074.6U CN201721601074U CN207518907U CN 207518907 U CN207518907 U CN 207518907U CN 201721601074 U CN201721601074 U CN 201721601074U CN 207518907 U CN207518907 U CN 207518907U
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model belongs to light-controlled lamp technical field, provides a kind of light sensation control circuit based on LED drive power.The light sensation control circuit based on LED drive power carries out being depressured filtering voltage regulation processing to generate firm power voltage output by being depressured filter regulator circuit to power voltage, light sensation voltage output is postponed to generate by delay control circuit delay disposal light sensation voltage again, compare delay light sensation voltage and reference voltage by comparing circuit again control signal is carried out turning on or off processing to generate control signal output control switch circuit, to generate, power supplying control signal output control driving chip accessory power supply powers to driving chip control circuit or stopping is powered, so as to fulfill to LED light luminous lighting or the energy-efficient accurate control of extinguishing.
Description
Technical field
The utility model belongs to light-controlled lamp technical field more particularly to a kind of light sensation control electricity based on LED drive power
Road.
Background technology
With the development of LED lighting technology, LED light luminous lighting or extinguish energy-efficient intelligent control technology also increasingly
It is ripe.For example, when daylight illumination brightness is less than particular value, LED light is controlled to automatically turn on illumination by LED drive power,
When daylight illumination brightness is higher than particular value, control LED light automatic distinguishing energy saving by LED drive power.
However, the existing easy interfered signal of LED drive power is interfered and is malfunctioned so that LED light luminous lighting
Or extinguish energy-efficient control precision and decline.
In conclusion existing LED drive power there is technical issues that easy interfered signal interference and occur.
Utility model content
The purpose of this utility model is to provide a kind of light sensation control circuits based on LED drive power, it is intended to solve existing
The technical issues of easy interfered signal is interfered and is malfunctioned existing for some LED drive powers.
To achieve the above object, can be in realization scheme at the first, the utility model, which provides, a kind of is based on LED drive power
Light sensation control circuit, including sequentially connected EMI filter circuit, current rectifying and wave filtering circuit, high-frequency switch circuit, transformer, defeated
Go out current rectifying and wave filtering circuit and LED load, further include reduction voltage circuit, driving chip control circuit, constant pressure and flow feedback circuit and drive
Dynamic chip accessory power supply, the reduction voltage circuit connect the current rectifying and wave filtering circuit, described in the driving chip control circuit connection
High-frequency switch circuit simultaneously connects the constant pressure and flow feedback circuit, the constant pressure and flow feedback circuit connection output rectification filter
Wave circuit, the driving chip accessory power supply connect the driving chip control circuit, further include：
Light sensation control circuit is connected between the reduction voltage circuit and the driving chip accessory power supply, for sensing light
According to intensity the LED load to be controlled to shine or extinguish；
The light sensation control circuit includes：
Filter regulator circuit is depressured, the reduction voltage circuit is connected with access power voltage, the power voltage is dropped
Pressure filtering voltage regulation handles to generate firm power voltage output；
Light sensation detection circuit connects the output terminal of the decompression filter regulator circuit to access the firm power voltage,
Illumination brightness is sensed to generate light sensation voltage output；
Delay control circuit connects the output terminal of the light sensation detection circuit to access the light sensation voltage, delay disposal
The light sensation voltage postpones light sensation voltage output to generate；
Reference voltage generating circuit connects the output terminal of the decompression filter regulator circuit to access the firm power electricity
Pressure carries out the firm power voltage voltage division processing to generate reference voltage output；
Comparison circuit connects the output of the output terminal and the reference voltage generating circuit of the delay control circuit respectively
End is to access the delay light sensation voltage and the reference voltage, and the delay light sensation voltage and the reference voltage are with life
Into control signal output；
Switching circuit connects the output terminal of the comparison circuit to access the control signal, according to the control signal
It carries out turning on or off processing to generate power supplying control signal output.
Scheme can be realized with reference to the first, and in second of achievable scheme, the light sensation control circuit further includes current limliting
Filter circuit；
The limiting filter circuit connects the output terminal of the comparison circuit to access the control signal, and to the control
Signal processed exports after carrying out current limliting filtering process；
The switching circuit connects the output terminal of the limiting filter circuit.
Scheme can be realized with reference to the first, can be in realization scheme at the third, the decompression filter regulator circuit includes the
One zener diode, the first capacitance, first resistor, the second capacitance and the second zener diode；
The first end of the cathode of first zener diode, the first end of first capacitance and the first resistor is total to
It connects to form the incoming end that the decompression filter regulator circuit accesses the power voltage；The anode of first zener diode,
The second end of first capacitance and the second end of second capacitance are connected to ground altogether；It is the first end of second capacitance, described
The cathode of the second end of first resistor and second zener diode connects the output to form the decompression filter regulator circuit altogether
End；The plus earth of second zener diode.
Scheme can be realized with reference to the first, and in the 4th kind of achievable scheme, the light sensation detection circuit includes the second electricity
Resistance, 3rd resistor and photodiode；
The first end of the first end of the second resistance and the 3rd resistor connects altogether to be formed the light sensation detection circuit and connects
Enter the incoming end of the firm power voltage；The second end of the second resistance, the second end of the 3rd resistor and the light
The anode of quick diode connects the output terminal to form the light sensation detection circuit altogether；The cathode of the photodiode is connected to ground.
Scheme can be realized with reference to the first, and in the 5th kind of achievable scheme, the delay control circuit includes the one or two
Pole pipe, the 4th resistance and third capacitance；
The just extremely described delay control circuit of first diode accesses the incoming end of the light sensation voltage；Described
The first end of the cathode of one diode, the first end of the 4th resistance and the third capacitance connects to form the delay control altogether
The output terminal of circuit；The second end of 4th resistance and the second end of the third capacitance are connected to ground.
Scheme can be realized with reference to the first, and in the 6th kind of achievable scheme, the reference voltage generating circuit includes the
Five resistance, the 6th resistance and the 7th resistance；
The first end of 5th resistance and the first end of the 6th resistance connect to form the reference voltage generation electricity altogether
The incoming end of the firm power voltage is accessed on road；
Second end, the second end of the 6th resistance and the first end of the 7th resistance of 5th resistance connect shape altogether
Into the output terminal of the reference voltage generating circuit；The second end ground connection of 7th resistance.
Scheme can be realized with reference to the first, and in the 7th kind of achievable scheme, the comparison circuit includes the 8th resistance, the
One operational amplifier and second operational amplifier；
The first end of 8th resistance, the reverse input end of first operational amplifier and second operation amplifier
The noninverting input of device connects to form the incoming end that the comparison circuit accesses the reference voltage altogether；
The second end of 8th resistance, the noninverting input of first operational amplifier and second operation amplifier
The output terminal of device connects altogether, and the output terminal of first operational amplifier is the output terminal of the comparison circuit；
The reverse input end of the second operational amplifier connects for the comparison circuit access delay light sensation voltage
Enter end, the output terminal of the power end connection decompression filter regulator circuit of the second operational amplifier, second operation
The ground terminal ground connection of amplifier.
Scheme can be realized with reference to the first, and in the 8th kind of achievable scheme, the switching circuit includes three pole of NPN type
Pipe, the second diode and the 9th resistance；
Incoming end of the base stage of the NPN type triode for the switching circuit access control signal, the NPN type
The emitter ground connection of triode, the collector of the NPN type triode are connected with the cathode of second diode；Described second
The anode of diode is connect with the first end of the 9th resistance, and the second end of the 9th resistance is exported for the switching circuit
The output terminal of the power supplying control signal.
With reference to second of achievable scheme, in the 9th kind of achievable scheme, the limiting filter circuit includes the tenth electricity
Resistance, the 11st resistance and the 4th capacitance；
Incoming end of the first end of tenth resistance for the limiting filter circuit access control signal；Described
The first end of the second end of ten resistance, the first end of the 11st resistance and the 4th capacitance connects to form the current limliting filter altogether
The output terminal of wave circuit；
The second end of 11st resistance and the second end of the 4th capacitance are connected to ground.
The light sensation control circuit based on LED drive power obtained by above-mentioned achievable scheme, strong antijamming capability have
Effect promotes LED light luminous lighting or extinguishes energy-efficient control precisely.The light sensation control circuit based on LED drive power passes through
Decompression filter regulator circuit carries out power voltage the processing of decompression filtering voltage regulation to generate firm power voltage output, then by prolonging
Slow control circuit delay disposal light sensation voltage compares delay light sensation electricity to generate delay light sensation voltage output, then by comparing circuit
Pressure and reference voltage carry out turning on or off processing to generate control signal output control switch circuit to control signal, with generation
Power supplying control signal output control driving chip accessory power supply powers to driving chip control circuit or stops powering, so as to fulfill
To LED light luminous lighting or extinguish energy-efficient accurate control.
Description of the drawings
Fig. 1 is that the circuit structure for the light sensation control circuit based on LED drive power that the utility model embodiment provides shows
It is intended to；
Fig. 2 is the electrical block diagram of the light sensation control circuit in Fig. 1.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
The technology malfunctioned to solve easy interfered signal interference existing for existing LED drive power is asked
Topic, the utility model embodiment provide a kind of light sensation control circuit based on LED drive power, referring to Fig. 1-2, are described in detail such as
Under：
Referring to Fig. 1, a kind of light sensation control circuit based on LED drive power, including sequentially connected EMI filter circuit,
Current rectifying and wave filtering circuit, high-frequency switch circuit, transformer, output rectifier and filter and LED load, should be based on LED drive power
Light sensation control circuit further include reduction voltage circuit, driving chip control circuit, constant pressure and flow feedback circuit and driving chip auxiliary
Power supply.
Wherein, reduction voltage circuit connection current rectifying and wave filtering circuit, driving chip control circuit connection high-frequency switch circuit simultaneously connect
Constant pressure and flow feedback circuit, constant pressure and flow feedback circuit connection output rectifier and filter, the connection of driving chip accessory power supply are driven
Dynamic chip control circuit.
It should be noted that EMI filter circuit, current rectifying and wave filtering circuit, high-frequency switch circuit, transformer, output rectification filter
Wave circuit, reduction voltage circuit, driving chip control circuit, constant pressure and flow feedback circuit and driving chip accessory power supply belong to ability
Domain conventional techniques do not make tired state herein.
In addition, being somebody's turn to do the light sensation control circuit based on LED drive power further includes light sensation control circuit, the light sensation control circuit
It is connected between reduction voltage circuit and driving chip accessory power supply, for sensing intensity of illumination so that LED load to be controlled to shine or extinguish.
The light sensation control circuit includes：
Filter regulator circuit is depressured, it is steady to carry out power voltage decompression filtering with access power voltage for connection reduction voltage circuit
Pressure handles to generate firm power voltage output.
It should be noted that decompression filter regulator circuit is carried out from reduction voltage circuit access power voltage at decompression filtering voltage regulation
Reason can filter out the interference signal in reduction voltage circuit, generate firm power voltage.
Specifically, referring to Fig. 2, decompression filter regulator circuit includes the first zener diode ZD1, the first capacitance C1, first
Resistance R1, the second capacitance C2 and the second zener diode ZD2.
Wherein, the first end of the cathode of the first zener diode ZD1, the first end of the first capacitance C1 and first resistor R1 is total to
Connect the incoming end to form decompression filter regulator circuit access power voltage.
The second end of the anode of first zener diode ZD1, the second end of the first capacitance C1 and the second capacitance C2 is connected to altogether
Ground.
The cathode of the first end of second capacitance C2, the second end of first resistor R1 and the second zener diode ZD2 connects shape altogether
Into the output terminal of decompression filter regulator circuit, the plus earth of the second zener diode ZD2.
It should be noted that the first zener diode ZD1 carries out voltage stabilizing processing for access power voltage.
First capacitance C1 is used to be filtered power voltage.
First resistor R1 is used to carry out decompression processing to power voltage.
Second capacitance C2 is used to be filtered power voltage.
Second zener diode ZD2 is used to carry out further voltage stabilizing processing to power voltage.
Light sensation detection circuit, the output terminal of connection decompression filter regulator circuit sense illumination to access firm power voltage
Brightness is to generate light sensation voltage output.
It should be noted that when daylight illumination brightness is less than particular value, light sensation detection circuit senses illumination brightness with life
It is final to realize that control LED light automatically turns on illumination into corresponding light sensation voltage output to subsequent conditioning circuit processing.It is bright in daylight illumination
When degree is higher than particular value, light sensation detection circuit senses illumination brightness to generate at corresponding light sensation voltage output to subsequent conditioning circuit
Reason, it is final to realize that control LED light automatic distinguishing is energy saving.
Specifically, referring to Fig. 2, light sensation detection circuit includes second resistance R2,3rd resistor R3 and photodiode X.
Wherein, the first end of second resistance R2 and the first end of 3rd resistor R3 connect to form light sensation detection circuit access perseverance altogether
Determine the incoming end of power voltage.The anode of the second end of second resistance R2, the second end of 3rd resistor R3 and photodiode X is total to
Connect the output terminal to form light sensation detection circuit.The cathode of photodiode X is connected to ground.
It should be noted that phase can occur for variations of the photodiode X with daylight illumination brightness, its own resistance
It should change, so that light sensation voltage output to the subsequent comparison circuit of the corresponding variation of light sensation detection circuit generation is compared
It handles to generate control signal.
Delay control circuit connects the output terminal of light sensation detection circuit to access light sensation voltage, delay disposal light sensation voltage
Light sensation voltage output is postponed with generation.
It should be noted that delay control circuit can to light sensation voltage carry out delay disposal after input again comparison circuit into
Row compares, and then can be abnormal fluctuation to avoid light sensation voltage and comparison circuit is caused to malfunction, and causes to compare precision decline.
Specifically, referring to Fig. 2, delay control circuit includes the first diode D1, the 4th resistance R4 and third capacitance C3.
First diode D1 just extremely delay control circuit access light sensation voltage incoming end.First diode D1's is negative
The first end of pole, the first end of the 4th resistance R4 and third capacitance C3 connects the output terminal to form delay control circuit altogether.4th electricity
It hinders the second end of R4 and the second end of third capacitance C3 is connected to ground.
It should be noted that the first diode D1, the 4th resistance R4 and third capacitance C3 are used to prolong light sensation voltage
Processing late.
Reference voltage generating circuit, the output terminal of connection decompression filter regulator circuit is to access firm power voltage, to perseverance
Determine power voltage and carry out voltage division processing to generate reference voltage output.
It should be noted that reference voltage generating circuit is exported for generating reference voltage to comparison circuit and delay light sensation
Voltage is compared to generate control signal.
Specifically, referring to Fig. 2, reference voltage generating circuit includes the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7.
Wherein, the first end of the 5th resistance R5 and the first end of the 6th resistance R6 connect altogether to form reference voltage generating circuit and connects
Enter the incoming end of firm power voltage.
Second end, the second end of the 6th resistance R6 and the first end of the 7th resistance R7 of 5th resistance R5 connects to form benchmark altogether
The output terminal of voltage generation circuit；The second end ground connection of 7th resistance R7.
It should be noted that the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7 generate reference voltage for dividing.
Comparison circuit, the output terminal of connection delay control circuit and the output terminal of reference voltage generating circuit are to access respectively
Postpone light sensation voltage and reference voltage, compare delay light sensation voltage and reference voltage and exported with generating control signal.
It should be noted that comparison circuit is defeated to generate control signal for comparing delay light sensation voltage and reference voltage
Go out.Wherein, control signal can be low level or high level.
When daylight illumination brightness is less than particular value, comparison circuit generation high level controls follow-up switching circuit to open, into
And driving chip accessory power supply is controlled to power to driving chip control circuit, and then control the action of driving chip control circuit
High-frequency switch circuit, transformer and output rectifier and filter action, so as to which LED load be controlled to open illumination.
When daylight illumination brightness is higher than particular value, the follow-up switching circuit shutdown of comparison circuit generation low level control, into
And driving chip accessory power supply is controlled to stop powering to driving chip control circuit, and then it is dynamic to stop driving chip control circuit
Make so that high-frequency switch circuit, transformer and output rectifier and filter stopping to be controlled to act, so as to which LED load be controlled to extinguish section
Energy.
Specifically, referring to Fig. 2, comparison circuit includes the 8th resistance R8, the first operational amplifier U1 and the second operation amplifier
Device U2.
Wherein, the first end of the 8th resistance R8, the first operational amplifier U1 reverse input end and second operational amplifier
The noninverting input of U2 connects the incoming end to form comparison circuit access reference voltage altogether.
The second end of 8th resistance R8, the noninverting input of the first operational amplifier U1 and second operational amplifier U2 it is defeated
Outlet connects altogether, and the output terminal of the first operational amplifier U1 is the output terminal of comparison circuit.
The reverse input end of second operational amplifier U2 is the incoming end of comparison circuit access delay light sensation voltage, and second transports
Calculate the output terminal of the power end connection decompression filter regulator circuit of amplifier U2, the ground terminal ground connection of second operational amplifier U2.
It should be noted that the 8th resistance R8 has back the effect of putting, stable reference voltage can be controlled, prevent comparator by
Interference signal malfunctions when interfering.
Switching circuit connects the output terminal of comparison circuit with incoming control signal, is opened or broken according to control signal
Processing is opened to generate power supplying control signal output.
Specifically, referring to Fig. 2, switching circuit includes NPN type triode Q, the second diode D2 and the 9th resistance R9.
Incoming end of the base stage of NPN type triode Q for switching circuit incoming control signal, the emitter of NPN type triode Q
The cathode connection of ground connection, the collector of NPN type triode Q and the second diode D2.The anode of second diode D2 and the 9th electricity
The first end connection of R9 is hindered, the second end of the 9th resistance R9 exports the output terminal of power supplying control signal for switching circuit.
With improvement, light sensation control circuit further includes limiting filter circuit.
The output terminal of limiting filter circuit connection comparison circuit carries out current limliting filter with incoming control signal to control signal
It is exported after wave processing.
Switching circuit connects the output terminal of limiting filter circuit.
It should be noted that limiting filter circuit is used to carry out current limliting filtering to control signal, with protection switch circuit.
Specifically, referring to Fig. 2, limiting filter circuit includes the tenth resistance R10, the 11st resistance R11 and the 4th capacitance C4.
The first end of tenth resistance R10 is the incoming end of limiting filter circuit incoming control signal.The of tenth resistance R10
The first end at two ends, the first end of the 11st resistance R11 and the 4th capacitance C4 connects the output terminal to form limiting filter circuit altogether.
The second end of 11st resistance R11 and the second end of the 4th capacitance C4 are connected to ground.
It should be noted that the tenth resistance R10, the 11st resistance R11 and the 4th capacitance C4 are used to carry out control signal
The NPN type triode Q of input switching circuit again after current limliting filtering, so as to the NPN type triode Q of protection switch circuit.
The light sensation control circuit based on LED drive power obtained by above-mentioned achievable scheme, strong antijamming capability have
Effect promotes LED light luminous lighting or extinguishes energy-efficient control precisely.The light sensation control circuit based on LED drive power passes through
Decompression filter regulator circuit carries out power voltage the processing of decompression filtering voltage regulation to generate firm power voltage output, then by prolonging
Slow control circuit delay disposal light sensation voltage compares delay light sensation electricity to generate delay light sensation voltage output, then by comparing circuit
Pressure and reference voltage carry out turning on or off processing to generate control signal output control switch circuit to control signal, with generation
Power supplying control signal output control driving chip accessory power supply powers to driving chip control circuit or stops powering, so as to fulfill
To LED light luminous lighting or extinguish energy-efficient accurate control.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (9)
1. a kind of light sensation control circuit based on LED drive power, including sequentially connected EMI filter circuit, rectifying and wave-filtering electricity
Road, high-frequency switch circuit, transformer, output rectifier and filter and LED load further include reduction voltage circuit, driving chip control
Circuit, constant pressure and flow feedback circuit and driving chip accessory power supply, the reduction voltage circuit connects the current rectifying and wave filtering circuit, described
Driving chip control circuit connects the high-frequency switch circuit and connects the constant pressure and flow feedback circuit, and the constant pressure and flow is anti-
Current feed circuit connects the output rectifier and filter, and the driving chip accessory power supply connects the driving chip control circuit,
It is characterized in that, it further includes：
Light sensation control circuit is connected between the reduction voltage circuit and the driving chip accessory power supply, strong for sensing illumination
It spends that the LED load is controlled to shine or extinguish；
The light sensation control circuit includes：
Filter regulator circuit is depressured, the reduction voltage circuit is connected with access power voltage, decompression filter is carried out to the power voltage
Wave voltage stabilizing handles to generate firm power voltage output；
Light sensation detection circuit connects the output terminal of the decompression filter regulator circuit to access the firm power voltage, senses
Illumination brightness is to generate light sensation voltage output；
Delay control circuit connects the output terminal of the light sensation detection circuit to access the light sensation voltage, described in delay disposal
Light sensation voltage postpones light sensation voltage output to generate；
Reference voltage generating circuit connects the output terminal of the decompression filter regulator circuit to access the firm power voltage,
Voltage division processing is carried out to the firm power voltage to generate reference voltage output；
Comparison circuit, connect respectively the output terminal of the delay control circuit and the output terminal of the reference voltage generating circuit with
The delay light sensation voltage and the reference voltage are accessed, the delay light sensation voltage and the reference voltage are controlled to generate
Signal output processed；
Switching circuit connects the output terminal of the comparison circuit to access the control signal, is carried out according to the control signal
Processing is turned on or off to generate power supplying control signal output.
2. the light sensation control circuit based on LED drive power as described in claim 1, which is characterized in that the light sensation control
Circuit further includes limiting filter circuit；
The limiting filter circuit connects the output terminal of the comparison circuit to access the control signal, and the control is believed
Number carry out current limliting filtering process after export；
The switching circuit connects the output terminal of the limiting filter circuit.
3. the light sensation control circuit based on LED drive power as described in claim 1, which is characterized in that the decompression filtering
Regulator circuit includes the first zener diode, the first capacitance, first resistor, the second capacitance and the second zener diode；
The first end of the cathode of first zener diode, the first end of first capacitance and the first resistor connects shape altogether
The incoming end of the power voltage is accessed into the decompression filter regulator circuit；It is the anode of first zener diode, described
The second end of first capacitance and the second end of second capacitance are connected to ground altogether；The first end of second capacitance, described first
The cathode of the second end of resistance and second zener diode connects the output terminal to form the decompression filter regulator circuit altogether；Institute
State the plus earth of the second zener diode.
4. the light sensation control circuit based on LED drive power as described in claim 1, which is characterized in that the light sensation detection
Circuit includes second resistance, 3rd resistor and photodiode；
The first end of the first end of the second resistance and the 3rd resistor connects to form the light sensation detection circuit access institute altogether
State the incoming end of firm power voltage；The second end of the second resistance, the second end of the 3rd resistor and described photosensitive two
The anode of pole pipe connects the output terminal to form the light sensation detection circuit altogether；The cathode of the photodiode is connected to ground.
5. the light sensation control circuit based on LED drive power as described in claim 1, which is characterized in that the delay control
Circuit includes the first diode, the 4th resistance and third capacitance；
The just extremely described delay control circuit of first diode accesses the incoming end of the light sensation voltage；Described 1st
The first end of the cathode of pole pipe, the first end of the 4th resistance and the third capacitance connects to form the delay control circuit altogether
Output terminal；The second end of 4th resistance and the second end of the third capacitance are connected to ground.
6. the light sensation control circuit based on LED drive power as described in claim 1, which is characterized in that the reference voltage
Generative circuit includes the 5th resistance, the 6th resistance and the 7th resistance；
The first end of 5th resistance and the first end of the 6th resistance connect altogether to be formed the reference voltage generating circuit and connects
Enter the incoming end of the firm power voltage；
Second end, the second end of the 6th resistance and the first end of the 7th resistance of 5th resistance connect to form institute altogether
State the output terminal of reference voltage generating circuit；The second end ground connection of 7th resistance.
7. the light sensation control circuit based on LED drive power as described in claim 1, which is characterized in that the comparison circuit
Including the 8th resistance, the first operational amplifier and second operational amplifier；
The first end of 8th resistance, the reverse input end of first operational amplifier and the second operational amplifier
Noninverting input connects to form the incoming end that the comparison circuit accesses the reference voltage altogether；
The second end of 8th resistance, the noninverting input of first operational amplifier and the second operational amplifier
Output terminal connects altogether, and the output terminal of first operational amplifier is the output terminal of the comparison circuit；
Incoming end of the reverse input end of the second operational amplifier for the comparison circuit access delay light sensation voltage,
The output terminal of the power end connection decompression filter regulator circuit of the second operational amplifier, the second operational amplifier
Ground terminal ground connection.
8. the light sensation control circuit based on LED drive power as described in claim 1, which is characterized in that the switching circuit
Including NPN type triode, the second diode and the 9th resistance；
Incoming end of the base stage of the NPN type triode for the switching circuit access control signal, three pole of NPN type
The emitter ground connection of pipe, the collector of the NPN type triode are connected with the cathode of second diode；Two or two pole
The anode of pipe is connect with the first end of the 9th resistance, and the second end of the 9th resistance is described in switching circuit output
The output terminal of power supplying control signal.
9. the light sensation control circuit based on LED drive power as claimed in claim 2, which is characterized in that the current limliting filtering
Circuit includes the tenth resistance, the 11st resistance and the 4th capacitance；
Incoming end of the first end of tenth resistance for the limiting filter circuit access control signal；Tenth electricity
The first end of the second end of resistance, the first end of the 11st resistance and the 4th capacitance connects to form the current limliting filtered electrical altogether
The output terminal on road；
The second end of 11st resistance and the second end of the 4th capacitance are connected to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721601074.6U CN207518907U (en) | 2017-11-27 | 2017-11-27 | Light sensation control circuit based on LED drive power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721601074.6U CN207518907U (en) | 2017-11-27 | 2017-11-27 | Light sensation control circuit based on LED drive power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207518907U true CN207518907U (en) | 2018-06-19 |
Family
ID=62541537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721601074.6U Active CN207518907U (en) | 2017-11-27 | 2017-11-27 | Light sensation control circuit based on LED drive power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207518907U (en) |
-
2017
- 2017-11-27 CN CN201721601074.6U patent/CN207518907U/en active Active
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