CN103841704B - Led lamp control circuit - Google Patents
Led lamp control circuit Download PDFInfo
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- CN103841704B CN103841704B CN201210485642.6A CN201210485642A CN103841704B CN 103841704 B CN103841704 B CN 103841704B CN 201210485642 A CN201210485642 A CN 201210485642A CN 103841704 B CN103841704 B CN 103841704B
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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
A kind of LED lamp control circuit, including：Voltage reduction module, positive and negative return circuit module, comparison module and Color control module.Above-mentioned LED lamp control circuit acquires the synchronous control signal that ac power frequency is used as Color control module by voltage reduction module, positive and negative return circuit module and comparison module.Therefore Color control module comparison module output pulse it is positive and negative alternately when control LED lamp color change, i.e., according to ac power frequency corresponds to the period it is positive and negative alternately control LED lamp color change.Since ac power frequency is fixed, thus the color change of LED lamp corresponds to the period according to ac power frequency and is changed, that is, realizes the synchronous control of LED lamp color change.The structure of above-mentioned LED lamp control circuit is simple simultaneously, thus cost is relatively low.
Description
Technical field
The present invention relates to LED lamps, are controlled more particularly to a kind of LED lamp of synchronous control LED lamp color change
Circuit.
Background technology
Application of the color LED in life is more and more extensive, thus, the control problem of LED color variation is also gone out therewith
It is existing.Usually, LED classifies by luminous tube luminescent color, can be divided into red, orange, green（Segment that yellowish green, standard is green and pure again
It is green）, blue light etc..In addition, including the chip of two kinds or three kinds colors in some light emitting diodes.No matter the color LED after encapsulation
Be determined by the color of luminous tube or chip determine, be required for controlling the internal illumination color of LED, to reach a variety of
Color change.But present LED color control program mostly can not the variation of multiple LED colors synchronous control, and control
Scheme cost is higher.
Invention content
Based on this, a kind of synchronous control, the LED lamp control circuit of LED lamp color change at low cost are provided.
A kind of LED lamp control circuit, including：Voltage reduction module, positive and negative return circuit module, comparison module and Color control mould
Block；
The voltage reduction module includes the input terminal and output end for being connect with AC power anode, and the voltage reduction module is used
In the rated operational voltage by the voltage drop of the AC power as low as the positive and negative return circuit module；
The positive and negative return circuit module include the input terminal being connect with the voltage reduction module output end, with the comparison module the
First output end of one input terminal connection and the second output terminal being connect with the second input terminal of the comparison module, described positive and negative time
The voltage that road module is used to be exported according to the voltage reduction module controls the on and off in itself circuit；
The comparison module is used to correspond to output pulse signal according to the circuit on and off of the positive and negative return circuit module,
Wherein, when the positive circuit conducting of the positive and negative return circuit module, the comparison module exports positive pulse, the positive and negative return circuit module
When negative circuit conducting, the comparison module exports negative pulse；
The Color control module controls the LED lamp color according to the output pulse signal of the comparison module and becomes
Change, the output pulse of the comparison module it is positive and negative alternately when, the Color control module controls the LED lamp color and changes.
The voltage reduction module includes divider resistance R2, the one end the divider resistance R2 and institute in one of the embodiments,
The connection of AC power anode is stated, the other end is connect with the input terminal of the positive and negative return circuit module.
The positive and negative return circuit module includes zener diode D1 and zener diode D2, institute in one of the embodiments,
State zener diode D1 anode connect with the cathode of the zener diode D2, the cathode of the zener diode D1 with it is described
The anode connection of zener diode D2；
The zener diode D1 anode connect with the cathode of the zener diode D2 after connecting pin for it is described just
First output end of negative return circuit module, after the cathode of the zener diode D1 is connect with the anode of the zener diode D2
Connecting pin is the second output terminal of the positive and negative return circuit module；
The anode of the zener diode D2 is connect with the output end of the voltage reduction module and the zener diode D2
Cathode is positive circuit in the positive and negative return circuit module after being connect with the first input end of the comparison module；
The cathode of the zener diode D1 is connect with the output end of the voltage reduction module and the zener diode D2
It is positive connect with the second input terminal of the comparison module after be negative circuit in the positive and negative return circuit module.
The comparison module includes comparator U2 in one of the embodiments, the normal phase input end of the comparator U2
It is connect with the second output terminal of the positive and negative return circuit module, the inverting input of the comparator U2 and the positive and negative return circuit module
First input end connection, the output end of the comparator U2 connect with the input terminal of the Color control module, the comparison
The power input of device U2 with power supply for connecting, the ground terminal ground connection of the comparator U2；
It is second defeated to correspond to the comparison module for normal phase input end, inverting input and the output end of the comparator U2
Enter end, first input end and output end.
The comparison module further includes divider resistance R3 in one of the embodiments, and the divider resistance R3 is series at
Between the output end and power input of the comparator U2.
The comparator U2 is comparator LM358 in one of the embodiments,.
In one of the embodiments, the Color control module include microcontroller, divider resistance R1, electrolytic capacitor C1,
Crystal oscillator Y1, capacitance C2 and capacitance C3, the counting end of the microcontroller are connect with the output end of the comparison module, the microcontroller
P1.0~P1.7 pins and P2.0~P2.7 pins correspondence connect with multiple LED lamps；The divider resistance R1 and the electricity
Solution capacitance C1 is series between the reset terminal and ground terminal of the microcontroller；The capacitance C2 is series at the microcontroller
Between the ends XTAL1 and ground terminal；The capacitance C3 is series between the ends XTAL2 of the microcontroller and ground terminal；The crystal oscillator
Y1 is series between the ends XTAL1 of the microcontroller and the ends XTAL2.
Further include divider resistance RX in one of the embodiments, the divider resistance RX is series at the P of the microcontroller
Between pin and LED lamp.
The microcontroller is microcontroller 80C31BH/BQA in one of the embodiments,.
Above-mentioned LED lamp control circuit acquires AC power frequency by voltage reduction module, positive and negative return circuit module and comparison module
Synchronous control signal of the rate as Color control module.Therefore output pulse positive and negative alternating of the Color control module in comparison module
When control LED lamp color change, i.e., according to ac power frequency corresponds to the period it is positive and negative alternately control LED lamp color
Change.Since ac power frequency is fixed, thus the color change of LED lamp corresponds to the period according to ac power frequency
It is changed, that is, realizes the synchronous control of LED lamp color change.The structure of above-mentioned LED lamp control circuit is simple simultaneously, because
And cost is relatively low.
Description of the drawings
Fig. 1 is the module map of LED lamp control circuit；
Fig. 2 is the schematic diagram of LED lamp control circuit.
Specific implementation mode
As shown in Figure 1, for the module map of LED lamp control circuit.
A kind of LED lamp control circuit, including：Voltage reduction module 101, positive and negative return circuit module 103, comparison module 105 and color
Color control module 107.
Voltage reduction module 101 includes the input terminal and output end for being connect with AC power anode, and voltage reduction module 101 is used for
By the voltage drop of the AC power as low as the rated operational voltage of positive and negative return circuit module 103.
The positive and negative return circuit module 103 includes the input terminal being connect with 103 output end of the voltage reduction module and the comparison
First output end of 105 first input end of module connection and the second output being connect with 105 second input terminal of the comparison module
End, the voltage that the positive and negative return circuit module 103 is used to be exported according to the voltage reduction module 101 control the conducting in itself circuit and cut
Only.
The comparison module 105 is used to correspond to output arteries and veins according to the circuit on and off of the positive and negative return circuit module 103
Rush signal, wherein when the positive circuit conducting of the positive and negative return circuit module 103, the comparison module exports positive pulse, described positive and negative
When the negative circuit conducting of return circuit module 103, the comparison module 105 exports negative pulse.
The Color control module 107 controls the LED lamp color according to the output pulse signal of the comparison module 105
Coloured silk variation, the output pulse of the comparison module 105 it is positive and negative alternately when, the Color control module 107 controls the LED lamp
Color changes.
Voltage reduction module 101 is by the voltage drop of AC power as low as the operating voltage size for being suitble to positive and negative return circuit module 103.Just
After negative return circuit module 103 receives the output voltage of voltage reduction module 101, positive circuit is controlled according to the period of output voltage and is born back
The conducting and cut-off on road.Specifically, in the positive half period of voltage, loop cutoff is born in positive circuit conducting.In the negative half period of voltage
In phase, positive loop cutoff bears circuit conducting.When the positive circuit conducting of positive and negative return circuit module 103, comparison module 105 corresponds to output
Positive pulse.When the negative circuit conducting of positive and negative return circuit module 103, comparison module 105 corresponds to output negative pulse.In comparison module 105
When persistently exporting positive pulse or negative pulse, Color control module 107 controls LED lamp color and remains unchanged.Only comparing
When positive and negative alternating occurs in the output pulse of module 105, Color control module controls LED lamp and changes color.
Incorporated by reference to Fig. 2.
Voltage reduction module 101 includes divider resistance R2, and the one end the divider resistance R2 is connect with the AC power anode, separately
One end is connect with the input terminal of the positive and negative return circuit module.AC power is depressured to ± 5V by voltage reduction module 101.
Positive and negative return circuit module 103 includes zener diode D1 and zener diode D2, the anode of the zener diode D1
It is connect with the cathode of the zener diode D2, the cathode of the zener diode D1 and the anode of the zener diode D2 connect
It connects.
The zener diode D1 anode connect with the cathode of the zener diode D2 after connecting pin for it is described just
First output end of negative return circuit module 103, the cathode of the zener diode D1 are connect with the anode of the zener diode D2
Connecting pin afterwards is the second output terminal of the positive and negative return circuit module 103.
Zener diode D2 anode connect with the output end of the voltage reduction module 101 and the zener diode D2 bear
Pole is positive circuit in the positive and negative return circuit module 103 after being connect with the first input end of the comparison module 105.
The cathode of zener diode D1 connect with the output end of voltage reduction module 101 and the zener diode D2 anode with
It is the negative circuit in the positive and negative return circuit module 103 after the second input terminal connection of the comparison module 105.
Comparison module 105 includes comparator U2, the normal phase input end of the comparator U2 and the positive and negative return circuit module 103
Second output terminal connection, the first input end of the inverting input of the comparator U2 and the positive and negative return circuit module 103 connects
It connects, the output end of the comparator U2 is connect with the input terminal of the Color control module 107, and the power supply of the comparator U2 is defeated
Enter end for being connect with power supply, the ground terminal of the comparator U2 is grounded.
Normal phase input end, inverting input and the output end of the comparator U2 corresponds to the of the comparison module 105
Two input terminals, first input end and output end.
Comparison module 105 further includes divider resistance R3, and the divider resistance R3 is series at the output end of the comparator U2
Between power input.
Comparator U2 is comparator LM358.
Color control module 107 includes microcontroller, divider resistance R1, electrolytic capacitor C1, crystal oscillator Y1, capacitance C2 and capacitance
C3, the counting end of the microcontroller are connect with the output end of the comparison module 107, P1.0~P1.7 pins of the microcontroller
And P2.0~P2.7 pins correspondence is connect with multiple LED lamps；The divider resistance R1 and the electrolytic capacitor C1 are series at institute
It states between the reset terminal of microcontroller and ground terminal；The capacitance C2 is series between the ends XTAL1 of the microcontroller and ground terminal；
The capacitance C3 is series between the ends XTAL2 of the microcontroller and ground terminal；The crystal oscillator Y1 is series at the microcontroller
Between the ends XTAL1 and the ends XTAL2.
Divider resistance RX, the divider resistance RX are series between the P pins of the microcontroller and LED lamp.
Microcontroller is microcontroller 80C31BH/BQA（40）.
Based on above-mentioned all embodiments, the operation principle of LED lamp control circuit is as follows：
After AC power is via divider resistance R2 decompressions, it is added to diode D1 and the both ends diode D2.In AC power
In voltage positive half period, the cathode voltage of diode D1 is higher than cathode voltage, thus diode D1 cut-offs.And the electricity of diode D2
Pressure drop is just on the contrary, i.e. the cathode voltage of diode D2 is higher than cathode voltage, and therefore, diode D2 is connected.At this time with positive and negative time
The input voltage for the normal phase input end than machine U2 that road module 103 connects is higher than the input voltage of inverting input, comparator
U2 exports positive pulse.Due in the positive half period of AC supply voltage, diode D2 is always to be connected, thus comparator U2
Positive pulse is exported always, that is, forms positive square wave voltage signal.The Color control module 107 being connect with comparator U2 is in comparator U2
In the time for exporting positive square wave voltage signal, the color for controlling the lamps and lanterns of LED does not change.
It similarly analyzes in the voltage negative half-cycle of AC power, the cathode voltage of diode D1 is less than cathode voltage, because
And diode D1 conductings.Corresponding, diode D2 is in cut-off state.At this time and positive and negative return circuit module 103 connect ratio machine
The input voltage of the normal phase input end of U2 is less than the input voltage of inverting input, and comparator U2 exports negative pulse.Due to handing over
In the positive half period of galvanic electricity source current, diode D1 is always to be connected, thus comparator U2 exports always negative pulse, that is, is formed
Negative square wave voltage signal.The Color control module 107 being connect with comparator U2 bears square wave voltage signal in comparator U2 outputs
In time, the color for controlling the lamps and lanterns of LED does not change.
When the positive and negative half period of AC supply voltage changes, it is corresponding i.e. comparator U2 output pulse signal by
Positive pulse becomes negative pulse or when negative pulse becomes positive pulse, and the color that Color control module 107 then controls LED lamp changes
Become.Since Color control module 107 controls the positive and negative half period one in the period and AC supply voltage of LED lamp color change
It causes, and the positive and negative half period of AC supply voltage is fixed.So Color control module 107 controls LED lamp color change
It is synchronous.
Above-mentioned LED lamp control circuit is acquired by voltage reduction module 101, positive and negative return circuit module 103 and comparison module 105 and is handed over
Synchronous control signal of the galvanic electricity source frequency as Color control module 107.Therefore Color control module 107 is in comparison module 105
Output pulse it is positive and negative alternately when control LED lamp color change, i.e., the positive and negative friendship in period is corresponded to according to ac power frequency
For the color change of control LED lamp.Due to ac power frequency be it is fixed, thus the color change of LED lamp according to
Ac power frequency corresponds to the period and is changed, thus realizes the synchronous control of LED lamp color change.Above-mentioned LED light simultaneously
The structure for having control circuit is simple, and the corresponding electronic component used is few, thus cost is relatively low.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of LED lamp control circuit, which is characterized in that including：Voltage reduction module, positive and negative return circuit module, comparison module and color
Color control module；
The voltage reduction module includes the input terminal and output end for being connect with AC power anode, and the voltage reduction module is used for will
The voltage drop of the AC power as low as the positive and negative return circuit module rated operational voltage；
The positive and negative return circuit module includes the input terminal being connect with the voltage reduction module output end, defeated with the comparison module first
The second output terminal for entering the first output end of end connection and being connect with the second input terminal of the comparison module, the positive and negative circuit mould
The voltage that block is used to be exported according to the voltage reduction module controls the on and off in itself circuit；
The comparison module is used to correspond to output pulse signal according to the circuit on and off of the positive and negative return circuit module,
In, when the positive circuit of the positive and negative return circuit module is connected, the comparison module exports positive pulse, and the positive and negative return circuit module is born
When circuit is connected, the comparison module exports negative pulse；
The Color control module controls the LED lamp color change, institute according to the pulse signal that the comparison module exports
State comparison module output pulse it is positive and negative alternately when, the Color control module controls the LED lamp color and changes.
2. LED lamp control circuit according to claim 1, which is characterized in that the voltage reduction module includes divider resistance
R2, the one end the divider resistance R2 are connect with the AC power anode, the input terminal of the other end and the positive and negative return circuit module
Connection.
3. LED lamp control circuit according to claim 1, which is characterized in that the positive and negative return circuit module includes voltage stabilizing
The anode of diode D1 and zener diode D2, the zener diode D1 are connect with the cathode of the zener diode D2, institute
The cathode for stating zener diode D1 is connect with the anode of the zener diode D2；
Connecting pin after the anode of the zener diode D1 is connect with the cathode of the zener diode D2 is described positive and negative time
First output end of road module, the anode of the cathode of the zener diode D1 and the zener diode D2 connect after connection
End is the second output terminal of the positive and negative return circuit module；
The anode of the zener diode D2 is connect with the output end of the voltage reduction module and the cathode of the zener diode D2
It is the positive circuit in the positive and negative return circuit module after being connect with the first input end of the comparison module；
The anode of the zener diode D1 is connect with the output end of the voltage reduction module and the cathode of the zener diode D1
It is the negative circuit in the positive and negative return circuit module after being connect with the second input terminal of the comparison module.
4. LED lamp control circuit according to claim 1, which is characterized in that the comparison module includes comparator U2,
The normal phase input end of the comparator U2 is connect with the second output terminal of the positive and negative return circuit module, the reverse phase of the comparator U2
Input terminal is connect with the first input end of the positive and negative return circuit module, the output end of the comparator U2 and the Color control mould
The input terminal of block connects, and the power input of the comparator U2 with power supply for connecting, the ground connection termination of the comparator U2
Ground；
Normal phase input end, inverting input and the output end of the comparator U2 corresponds to the second input of the comparison module
End, first input end and output end.
5. LED lamp control circuit according to claim 4, which is characterized in that the comparison module further includes partial pressure electricity
R3 is hindered, the divider resistance R3 is series between the output end and power input of the comparator U2.
6. LED lamp control circuit according to claim 4, which is characterized in that the comparator U2 is comparator
LM358。
7. LED lamp control circuit according to claim 1, which is characterized in that the Color control module includes monolithic
Machine, divider resistance R1, electrolytic capacitor C1, crystal oscillator Y1, capacitance C2 and capacitance C3, the counting end of the microcontroller mould compared with described
The output end of block connects, and the P1.0~P1.7 pins and P2.0~P2.7 pins of the microcontroller are corresponded to be connected with multiple LED lamps
It connects；The divider resistance R1 and the electrolytic capacitor C1 are series between the reset terminal and ground terminal of the microcontroller；The electricity
Hold C2 to be series between the ends XTAL1 of the microcontroller and ground terminal；The capacitance C3 is series at the ends XTAL2 of the microcontroller
Between ground terminal；The crystal oscillator Y1 is series between the ends XTAL1 of the microcontroller and the ends XTAL2.
8. LED lamp control circuit according to claim 7, which is characterized in that further include divider resistance RX, the partial pressure
Resistance RX is series between the P pins of the microcontroller and LED lamp.
9. LED lamp control circuit according to claim 7, which is characterized in that the microcontroller is microcontroller
80C31BH/BQA。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210485642.6A CN103841704B (en) | 2012-11-23 | 2012-11-23 | Led lamp control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210485642.6A CN103841704B (en) | 2012-11-23 | 2012-11-23 | Led lamp control circuit |
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|---|---|
| CN103841704A CN103841704A (en) | 2014-06-04 |
| CN103841704B true CN103841704B (en) | 2018-07-27 |
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| CN201210485642.6A Active CN103841704B (en) | 2012-11-23 | 2012-11-23 | Led lamp control circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107102670A (en) * | 2017-04-24 | 2017-08-29 | 安徽师范大学 | A kind of generating positive and negative voltage out-put supply module with voltage stabilizing function |
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