CN106922055A - Adjustable photochromic LED drive circuit - Google Patents
Adjustable photochromic LED drive circuit Download PDFInfo
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- CN106922055A CN106922055A CN201710278730.1A CN201710278730A CN106922055A CN 106922055 A CN106922055 A CN 106922055A CN 201710278730 A CN201710278730 A CN 201710278730A CN 106922055 A CN106922055 A CN 106922055A
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
Abstract
The present invention relates to a kind of adjustable photochromic LED drive circuit, change and produce light source for carrying out electric energy in LED lamp, the color of adjustable the sent light of the LED drive circuit.Rectification circuit, the DC/DC change-over circuits of the connection rectification circuit, the LED load circuit for connecting the DC/DC change-over circuits and the adjustment module for connecting the DC/DC change-over circuits that the adjustable photochromic LED drive circuit includes input circuit, connects the input circuit；The LED load circuit includes some LED modules；The adjustment module can adjust the working condition of each described LED modules in the LED load circuit；The LED load circuit includes a LED modules, the 2nd LED modules and the 3rd LED modules.Adjustable photochromic LED drive circuit of the invention is by setting adjustment module, the photochromic of light for being sent the LED load module comprising some photochromic different LED modules can be adjusted to enable LED drive circuit to meet the photochromic demand of user's change light.
Description
Technical field
The present invention relates to LED drive circuit, espespecially a kind of adjustable photochromic LED drive circuit.
Background technology
LED drive circuit is the important component of LED lamp, and it will be converted to the straight of stabilization from the extraneous electric energy for obtaining
Stream electricity provides power supply for connected LED lamp bead.Current LED drive circuit typically is only capable of providing single for LED lamp bead
Driving condition, that is to say, that even if LED drive circuit and photochromic different multiple LED lamp bead groups connection, LED drive circuit
Single mode of operation can only be provided, the light tone of LED is fixed, and user cannot adjust LED according to their needs
Tone.
The content of the invention
Based on this, the adjustable photochromic LED that the present invention provides a kind of adjustable inside difference LED module working conditions drives
Dynamic circuit.
In order to realize the purpose of the present invention, the present invention uses following technical scheme：
A kind of adjustable photochromic LED drive circuit, it is characterised in that including input circuit, connect the input circuit
Rectification circuit, connect the DC/DC change-over circuits of the rectification circuit, connect the LED load electricity of the DC/DC change-over circuits
Road and the adjustment module of the connection DC/DC change-over circuits；
The input circuit is provided with the first electric energy connection end, the second electric energy connection end；The input circuit is additionally provided with first
Rectification connection end, the second rectification connection end；
The rectification circuit is provided with the first exchange connection end, the second exchange connection end；The rectifying and wave-filtering is additionally provided with direct current
Positive pole, direct current negative pole；The rectifying and wave-filtering first exchange connection end, second exchange connection end respectively with the input circuit
First rectification connection end, the connection of the second rectification connection end；
The DC/DC change-over circuits are provided with anode connection terminal, negative pole connection end, positive supply side and negative supply side；The DC/
Anode connection terminal, the negative pole connection end of DC change-over circuits direct-flow positive pole respectively with the rectification circuit, direct current negative pole are connected.
Adjustable photochromic LED drive circuit of the invention is made comprising some photochromic different by setting adjustment module
The photochromic of the light that the LED load module of LED modules is sent can be adjusted to enable LED drive circuit to meet user to change
Become the photochromic demand of light.
Wherein in one embodiment, the LED load circuit is provided with power end；The power end of the LED load circuit
Positive supply side with the DC/DC change-over circuits is connected；
The LED load circuit includes a LED modules, the 2nd LED modules and the 3rd LED modules；First LED
Module, the 2nd LED modules and the 3rd LED modules are respectively provided with positive receiving terminal and negative receiving terminal；The first LED modules, the 2nd LED
The positive receiving terminal of module and the 3rd LED modules converges to form the LED load circuit power end；The first LED modules, second
The negative receiving terminal of LED modules and the 3rd LED modules is connected with the adjustment module respectively.
Wherein in one embodiment, signal generator of the adjustment module including the connection DC/DC change-over circuits,
The control circuit for connecting the signal generator and the on-off component for connecting the control circuit.
Wherein in one embodiment, the signal generator is provided with the first adjustable side and the second adjustable side；The control
Circuit is provided with the first signal end, secondary signal end；First adjustable side, second adjustable side of the signal generator respectively with it is described
Control the first signal end, the connection of secondary signal end of circuit；It is described control circuit be additionally provided with the first control end, the second control end and
3rd control end.
Wherein in one embodiment, the on-off component includes switching tube Q3, switching tube Q4, switching tube Q5；It is described to open
Close the first control end of the grid connection control circuit of pipe Q3；The grid connection control circuit the of the switching tube Q4
Two control ends；3rd control end of the grid connection control circuit of the switching tube Q5.
Wherein in one embodiment, the negative receiving terminal of drain electrode connection the first LED modules of the switching tube Q3；Institute
State the negative receiving terminal of drain electrode connection the 2nd LED modules of switching tube Q4；The drain electrode connection the described 3rd of the switching tube Q5
The negative receiving terminal of LED modules；The source electrode of the switching tube Q5 connects the negative supply side of the DC/DC change-over circuits；The switch
The source electrode of pipe Q5 is also respectively connected with the source electrode of the switching tube Q3, the source electrode of the switching tube Q4.
Wherein in one embodiment, it is described control circuit include variable resistor Rp1, resistance R1, resistance R2, resistance R3,
Resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, comparator U1, comparator U2, diode D1, diode
D2, switching tube Q1, switching tube Q2；The positive terminal of the comparator U1 as the control circuit the first signal end, it is and described
The first adjustable side connection of signal generator；The backward end of the comparator U1 is connected with one end of the variable resistor Rp1；Institute
The one end of the end of oppisite phase of comparator U1 also with resistance R1 is stated to be connected；The end of oppisite phase of the comparator U1 is also with the comparator U2's
End of oppisite phase is connected；The other end of the resistance R1 connects the positive supply side of the DC/DC change-over circuits；The resistance R1's is another
End is also respectively connected with the resistance R3, the resistance R4, one end of the resistance R5；The positive terminal of the comparator U2 is used as institute
The secondary signal end of control circuit is stated, is connected with the second adjustable side of the signal generator；The output end of the comparator U1
With one end of the resistance R6；The other end of the resistance R6 as it is described control circuit the first control end, with the break-make
Component is connected；The one end of the output end of the comparator U1 also with the resistance R2 is connected；The other end of the resistance R2 and institute
State the base stage connection of switching tube Q1；The colelctor electrode of the switching tube Q1 connects the other end of the resistance R3 and two pole respectively
The negative electrode of pipe D1；The anode of the diode D1 connects the other end, one end of the resistance R7 and the institute of the resistance R4 respectively
State the anode of diode D2；The other end of the resistance R7 as it is described control circuit the second control end, with the break-make group
Part is connected；The output end of the comparator U2 connects the negative electrode of the diode D2 and one end of resistance R9 respectively；The resistance
The other end of R9 connects the base stage of the switching tube Q2；The colelctor electrode of the switching tube Q2 connects the other end of the resistance R5；
The colelctor electrode of the switching tube Q2 is also connected with one end of the resistance R8；The other end of the resistance R8 is used as the control circuit
The 3rd control end, be connected with the on-off component；The negative supply of the emitter-base bandgap grading of the switching tube Q2 and the DC/DC change-over circuits
End connection；Emitter-base bandgap grading of the emitter-base bandgap grading of the switching tube Q2 also with the switching tube Q1 is connected；State the emitter-base bandgap grading of switching tube Q2 also with it is described
The other end connection of variable resistor Rp1.
Brief description of the drawings
Fig. 1 is the structure of the adjustable photochromic LED drive circuit of a preferred embodiment of the invention；
Fig. 2 is the structure chart of the adjustment module in Fig. 1；
Fig. 3 is the circuit diagram for controlling circuit and on-off component in Fig. 2.
Specific embodiment
For the ease of understanding the present invention, the present invention will be described more fully below.But, the present invention can be with perhaps
More different form is realized, however it is not limited to embodiment described herein.On the contrary, the purpose for providing these embodiments is to make
Understanding to the disclosure is more thorough comprehensive.
Unless otherwise defined, all of technologies and scientific terms used here by the article with belong to technical field of the invention
The implication that technical staff is generally understood that is identical.The term for being used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
Fig. 1 to Fig. 3 is referred to, the present invention proposes a kind of adjustable photochromic LED drive circuit, in LED lamp
Carry out electric energy to change and produce light source, the color of adjustable the sent light of the LED drive circuit.It is described adjustable photochromic
LED drive circuit includes input circuit 10, the rectification circuit 20 of the connection input circuit 10, connects the rectification circuit 20
DC/DC change-over circuits 30, the LED load circuit 40 for connecting the DC/DC change-over circuits 30 and the connection DC/DC conversions electricity
The adjustment module 50 on road 30；The LED load circuit 40 includes some LED modules；The adjustment module 50 can adjust the LED
The working condition of each described LED modules in load circuit 40.
The input circuit 10 is provided with the first electric energy connection end, the second electric energy connection end；The input circuit 10 is additionally provided with
First rectification connection end, the second rectification connection end.
The rectification circuit 20 is provided with the first exchange connection end, the second exchange connection end；The rectifying and wave-filtering is additionally provided with directly
Stream positive pole, direct current negative pole；The rectifying and wave-filtering first exchange connection end, second exchange connection end respectively with the input circuit
10 the first rectification connection end, the connection of the second rectification connection end.
The DC/DC change-over circuits 30 are provided with anode connection terminal, negative pole connection end, positive supply side and negative supply side；It is described
Anode connection terminal, the negative pole connection end of DC/DC change-over circuits 30 direct-flow positive pole, direct current negative pole respectively with the rectification circuit 20
Connection.
The LED load circuit 40 is provided with power end；The power end of the LED load circuit 40 is changed with the DC/DC
The positive supply side connection of circuit 30；The LED load circuit 40 includes a LED modules 41, the 2nd LED modules 42 and the 3rd
LED modules 43；The first LED modules 41, the 2nd LED modules 42 and the 3rd LED modules 43 are respectively provided with positive receiving terminal and bear and connect
Receiving end；The positive receiving terminal of the first LED modules 41, the 2nd LED modules 42 and the 3rd LED modules 43 converges to form the LED
The power end of load circuit 40；The negative receiving terminal difference of the first LED modules 41, the 2nd LED modules 42 and the 3rd LED modules 43
It is connected with the adjustment module 50；The meeting when being powered of the first LED modules 41, the 2nd LED modules 42 and the 3rd LED modules 43
Send the light of different colours.
The adjustment module 50 includes the signal generator 51 of the connection DC/DC change-over circuits 30, connects the signal
The on-off component 53 of the control circuit 52 of generator 51 and the connection control circuit 52；The signal generator 51 is provided with first
Adjustable side and the second adjustable side；First adjustable side and the second adjustable side of the signal generator 51 connect with the control circuit 52
Connect.
The control circuit 52 is provided with the first signal end, secondary signal end；The control circuit 52 is additionally provided with the first control
End, the second control end and the 3rd control end；It is described control circuit 52 include variable resistor Rp1, resistance R1, R2, R3, R4, R5,
R6, R7, R8, R9, comparator U1, U2, diode D1, D2, switching tube Q1, Q2；The positive terminal of the comparator U1 is used as described
The first signal end of circuit 52 is controlled, is connected with the first adjustable side of the signal generator 51；The comparator U1's is reverse
End is connected with one end of the variable resistor Rp1；The one end of the end of oppisite phase of the comparator U1 also with resistance R1 is connected；The ratio
The end of oppisite phase of end of oppisite phase compared with device U1 also with the comparator U2 is connected；The other end of the resistance R1 connects the DC/DC and turns
The positive supply side of circuit 30 is changed, to obtain electric energy；The other end of the resistance R1 is also respectively connected with described resistance R3, R4, R5's
One end；The positive terminal of the comparator U2 as it is described control circuit 52 secondary signal end, with the signal generator 51
Second adjustable side connects；The output end of the comparator U1 connects one end of the resistance R6；The other end of the resistance R6 is made
It is the first control end of the control circuit 52, is connected with the on-off component 53；The output end of the comparator U1 also with institute
State one end connection of resistance R2；The other end of the resistance R2 is connected with the base stage of the switching tube Q1；The switching tube Q1's
Colelctor electrode connects the other end of the resistance R3 and the negative electrode of the diode D1 respectively；The anode of the diode D1 connects respectively
Connect the anode of the other end, one end of the resistance R7 and the diode D2 of the resistance R4；The other end of the resistance R7
As the second control end of the control circuit 52, it is connected with the on-off component 53；The output end difference of the comparator U2
Connect the negative electrode of the diode D2 and one end of resistance R9；The other end of the resistance R9 connects the base of the switching tube Q2
Pole；The colelctor electrode of the switching tube Q2 connects the other end of the resistance R5；The colelctor electrode of the switching tube Q2 is also connected with described
One end of resistance R8；The other end of the resistance R8 as it is described control circuit 52 the 3rd control end, with the on-off component
53 connections；The emitter-base bandgap grading of the switching tube Q2 is connected with the negative supply side of the DC/DC change-over circuits 30；The switching tube Q2's penetrates
Emitter-base bandgap grading of the pole also with the switching tube Q1 is connected；The other end of the emitter-base bandgap grading of switching tube Q2 also with the variable resistor Rp1 is stated to be connected.
The on-off component 53 includes switching tube Q3, Q4, Q5；The grid connection control circuit 52 of the switching tube Q3
The first control end；The grid connection control control end of circuit 52 second of the switching tube Q4；The grid of the switching tube Q5
3rd control end of the pole connection control circuit 52；The drain electrode of the switching tube Q3 connects the negative of a LED modules 41
Receiving terminal；The negative receiving terminal of drain electrode connection the 2nd LED modules 42 of the switching tube Q4；The drain electrode of the switching tube Q5 connects
Connect the negative receiving terminal of the 3rd LED modules 43；The source electrode of the switching tube Q5 connects the negative confession of the DC/DC change-over circuits 30
To end；The source electrode of the switching tube Q5 is also respectively connected with the source electrode of the switching tube Q3 and the source electrode of the switching tube Q4.
, in normal work, electric current is through the rectification of the rectification circuit 20 and warp for the adjustable photochromic LED drive circuit
After the DC/DC change-over circuits 30 are adjusted, stabilization is exported between the positive supply side and negative supply side of the DC/DC change-over circuits 30
Direct current.
After the signal generator 51 obtains electric energy from the positive supply side and negative supply side of the DC/DC change-over circuits 30,
Produce the first oscillator signal Uo1 (t) and the second oscillator signal Uo2 (t)；First oscillator signal Uo1 (t) and the second vibration letter
Number Uo2 (t) is exported through the first adjustable side of the signal generator 51, the second adjustable side respectively；The first oscillator signal Uo1
The positive terminal of the first comparator U1 of (t) input control circuit 52；Second oscillator signal Uo2 (t) is input into institute
State the positive terminal of the second comparator U2 of control circuit 52；One end of the variable resistor Rp1 is produced variable by partial pressure
Control voltage Uc；By changing the resistance of variable resistor Rp1, the size of the control voltage Uc can be changed.
Wherein in a kind of implementation method, first oscillator signal Uo1 (t) and the second oscillator signal Uo2 (t) be with
The sawtooth waveforms of same period, and the fluctuation range of first oscillator signal Uo1 (t) is [Uo1min,Uo1max], described second shakes
The fluctuation range for swinging signal Uo2 (t) is [Uo2min,Uo2max].Wherein, Uo1minMore than Uo2max；When Uc is more than Uo1maxWhen, institute
Comparator U1, U2 output low potential are stated, makes the switching tube Q3, Q4 keep cut-off, the switching tube Q5 to be held on；At Uc
In [Uo1min,Uo1max] in the range of when, the comparator U2 exports low potential, is held on the switching tube Q5, described opens
Close pipe Q4 and keep cut-off, meanwhile, during the first oscillator signal Uo1 (t) mechanical periodicity, when Uo1 (t) is more than Uc,
The comparator U1 exports high potential, and the switching tube Q3 is turned on, and when Uo1 (t) is less than Uc, the comparator U1 exports low electricity
Position, the switching tube Q3 shut-offs；When Uc is in (Uo2max,Uo1min) in the range of when, it is comparator U1 output high potential, described
Comparator U2 exports low potential, is held on the switching tube Q3, Q5, is held off the switching tube Q4；When Uc is in
[Uo2min,Uo2max] in the range of when, the comparator U1 exports high level, is held on the switching tube Q3, the switch
Pipe Q4 keeps cut-off, meanwhile, during the second oscillator signal Uo2 (t) mechanical periodicity, when Uo2 (t) is more than Uc, institute
Comparator U2 output high potentials are stated, the switching tube Q5 is turned off, and when Uo2 (t) is less than Uc, the comparator U2 exports low electricity
Position, the switching tube Q5 conductings.
Specifically, when the comparator U1 exports high level, the grid of the switching tube Q3 is obtained by the resistance R6
Obtain high level and turn on, meanwhile, the base stage of the switching tube Q1 receives high level and turns on, and makes the switching tube Q4 because of grid
It is connected to low level and turns off；When the comparator U1 exports low potential, the grid of the switching tube Q3 passes through the resistance R6
Obtain low level and turn off, meanwhile, the switching tube Q1 is turned off because base stage receives low level；When comparator U2 outputs
During high potential, the switching tube Q2 conductings make the grid of the switching tube Q5 be turned off because receiving low level, if now described
Comparator U1 exports low level, then Q4 is turned on because grid is connected to high level；It is described when the comparator U2 exports low potential
Switching tube Q2 shut-offs make the grid of the switching tube Q5 be turned on because receiving high level, meanwhile, the switching tube Q4 is because of grid
Low level is received by the resistance R7 and is turned off.
In the above-described embodiment, when the switching tube Q3 is turned on, the electrified light emitting of a LED modules 41；Work as institute
When stating switching tube Q4 conductings, the electrified light emitting of the 2nd LED modules 42；When the switching tube Q5 is turned on, the 3rd LED moulds
43 electrified light emittings of group；First oscillator signal Uo1 (t) and the second oscillator signal Uo2 (t) are high-frequency oscillation signal, by adjusting
The size that the variable resistor Rp1 changes the control voltage Uc is saved, a LED modules 41, the 2nd LED can be changed
The electrified light emitting time of module 42 and the 3rd LED modules 43 within same cycle of oscillation, so that the LED drive circuit
The photochromic of the light for being sent uniformly is adjusted.
Adjustable photochromic LED drive circuit of the invention is made comprising some photochromic different by setting adjustment module
The photochromic of the light that the LED load module of LED modules is sent can be adjusted to enable LED drive circuit to meet user to change
Become the photochromic demand of light.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (7)
1. it is a kind of to can adjust photochromic LED drive circuit, it is characterised in that including input circuit, to connect the input circuit
Rectification circuit, the DC/DC change-over circuits for connecting the rectification circuit, the LED load circuit for connecting the DC/DC change-over circuits,
And connect the adjustment module of the DC/DC change-over circuits；
The input circuit is provided with the first electric energy connection end, the second electric energy connection end；The input circuit is additionally provided with the first rectification
Connection end, the second rectification connection end；
The rectification circuit is provided with the first exchange connection end, the second exchange connection end；The rectifying and wave-filtering be additionally provided with direct-flow positive pole,
Direct current negative pole；First exchange connection end, the second exchange connection end of the rectifying and wave-filtering are respectively with the first of the input circuit
Rectification connection end, the connection of the second rectification connection end；
The DC/DC change-over circuits are provided with anode connection terminal, negative pole connection end, positive supply side and negative supply side；The DC/DC turns
Anode connection terminal, the negative pole connection end of circuit direct-flow positive pole respectively with the rectification circuit, direct current negative pole is changed to be connected.
2. it is according to claim 1 to can adjust photochromic LED drive circuit, it is characterised in that the LED load circuit sets
There is power end；The power end of the LED load circuit is connected with the positive supply side of the DC/DC change-over circuits；
The LED load circuit includes a LED modules, the 2nd LED modules and the 3rd LED modules；The first LED modules,
2nd LED modules and the 3rd LED modules are respectively provided with positive receiving terminal and negative receiving terminal；The first LED modules, the 2nd LED modules
And the 3rd the positive receiving terminal of LED modules converge to form the LED load circuit power end；The first LED modules, the 2nd LED
The negative receiving terminal of module and the 3rd LED modules is connected with the adjustment module respectively.
3. it is according to claim 2 to can adjust photochromic LED drive circuit, it is characterised in that the adjustment module includes
Connect signal generator, the control circuit of the connection signal generator and the connection control of the DC/DC change-over circuits
The on-off component of circuit.
4. it is according to claim 3 to can adjust photochromic LED drive circuit, it is characterised in that the signal generator sets
There are the first adjustable side and the second adjustable side；The control circuit is provided with the first signal end, secondary signal end；The signal generator
The first adjustable side, the second adjustable side be connected with control first signal end of circuit, secondary signal end respectively；The control
Circuit is additionally provided with the first control end, the second control end and the 3rd control end.
5. it is according to claim 4 to can adjust photochromic LED drive circuit, it is characterised in that the on-off component includes
Switching tube Q3, switching tube Q4, switching tube Q5；First control end of the grid connection control circuit of the switching tube Q3；Institute
State the grid connection control control end of circuit second of switching tube Q4；The grid of the switching tube Q5 connects the control circuit
The 3rd control end.
6. it is according to claim 5 to can adjust photochromic LED drive circuit, it is characterised in that the leakage of the switching tube Q3
Pole connects the negative receiving terminal of a LED modules；The negative reception of drain electrode connection the 2nd LED modules of the switching tube Q4
End；The negative receiving terminal of drain electrode connection the 3rd LED modules of the switching tube Q5；The source electrode connection of the switching tube Q5 is described
The negative supply side of DC/DC change-over circuits；The source electrode of the switching tube Q5 is also respectively connected with the source electrode of the switching tube Q3, described opens
Close the source electrode of pipe Q4.
7. it is according to claim 4 to can adjust photochromic LED drive circuit, it is characterised in that the control circuit includes
Variable resistor Rp1, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, than
Compared with device U1, comparator U2, diode D1, diode D2, switching tube Q1, switching tube Q2；The positive terminal conduct of the comparator U1
First signal end of the control circuit, is connected with the first adjustable side of the signal generator；The comparator U1's is reverse
End is connected with one end of the variable resistor Rp1；The one end of the end of oppisite phase of the comparator U1 also with resistance R1 is connected；The ratio
The end of oppisite phase of end of oppisite phase compared with device U1 also with the comparator U2 is connected；The other end of the resistance R1 connects the DC/DC and turns
Change the positive supply side of circuit；The other end of the resistance R1 is also respectively connected with the resistance R3, the resistance R4, the resistance R5
One end；The positive terminal of the comparator U2 as the control circuit secondary signal end, with the signal generator the
Two adjustable sides connect；One end of the output end of the comparator U1 and the resistance R6；The other end of the resistance R6 is used as institute
The first control end of control circuit is stated, is connected with the on-off component；The output end of the comparator U1 also with the resistance R2
One end connection；The other end of the resistance R2 is connected with the base stage of the switching tube Q1；The colelctor electrode of the switching tube Q1 point
The other end of the resistance R3 and the negative electrode of the diode D1 are not connected；The anode of the diode D1 connects the electricity respectively
Hinder the anode of the other end, one end of the resistance R7 and the diode D2 of R4；The other end of the resistance R7 is used as described
The second control end of circuit is controlled, is connected with the on-off component；The output end of the comparator U2 connects two pole respectively
The negative electrode of pipe D2 and one end of resistance R9；The other end of the resistance R9 connects the base stage of the switching tube Q2；The switching tube
The colelctor electrode of Q2 connects the other end of the resistance R5；The colelctor electrode of the switching tube Q2 is also connected with one end of the resistance R8；
The other end of the resistance R8 is connected as the 3rd control end of the control circuit with the on-off component；The switching tube
The emitter-base bandgap grading of Q2 is connected with the negative supply side of the DC/DC change-over circuits；The emitter-base bandgap grading of the switching tube Q2 also with the switching tube Q1
Emitter-base bandgap grading connection；The other end of the emitter-base bandgap grading of switching tube Q2 also with the variable resistor Rp1 is stated to be connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710278730.1A CN106922055B (en) | 2017-04-25 | 2017-04-25 | Photochromic LED drive circuit is adjusted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710278730.1A CN106922055B (en) | 2017-04-25 | 2017-04-25 | Photochromic LED drive circuit is adjusted |
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| CN106922055A true CN106922055A (en) | 2017-07-04 |
| CN106922055B CN106922055B (en) | 2019-03-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114126138A (en) * | 2021-11-30 | 2022-03-01 | 广州彩熠灯光股份有限公司 | Circuit and lamp |
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| CN114126138A (en) * | 2021-11-30 | 2022-03-01 | 广州彩熠灯光股份有限公司 | Circuit and lamp |
| CN114126138B (en) * | 2021-11-30 | 2023-11-21 | 广州彩熠灯光股份有限公司 | Circuit and lamp |
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| Publication number | Publication date |
|---|---|
| CN106922055B (en) | 2019-03-19 |
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Address after: 523000 No. 31 Wujiayong Section, Beiwang Road, Zhongtang Town, Dongguan City, Guangdong Province Patentee after: Dongguan Pan-American photoelectric Co Ltd Address before: 523820 Guangdong Province, Dongguan City Industrial Zone Dalingshan Lianping Zhen Lian Road Patentee before: Dongguan Pan-American photoelectric Co Ltd |