CN107172752B - A kind of electronic light modulator that compatible voltage range is wide - Google Patents
A kind of electronic light modulator that compatible voltage range is wide Download PDFInfo
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- CN107172752B CN107172752B CN201710481138.1A CN201710481138A CN107172752B CN 107172752 B CN107172752 B CN 107172752B CN 201710481138 A CN201710481138 A CN 201710481138A CN 107172752 B CN107172752 B CN 107172752B
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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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]
- H05B45/10—Controlling the intensity of the light
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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]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of electronic light modulators that compatible voltage range is wide, main control module, LED light-adjusting module, power module, zero point synchronous detection module, LED light-adjusting module respectively with main control module, external LED drive module is electrically connected, power module is main control module, the power supply of LED light-adjusting module, zero point synchronous detection module and alternating current or power module are electrically connected to detect frequency signal, frequency signal is input in main control module by zero point synchronous detection module, main control module goes out the PWM duty cycle that is adapted to external alternating current according to frequency signal modulation to LED light-adjusting module, LED light-adjusting module is modulated into dim signal and LED load is driven to operate into LED drive module, the design accomplishes that supply district expands to 90V-270V for electric energy using Switching Power Supply, add zero point Synchronous detection module is adapted to PWM duty cycle output with the alternating current of access, reaches good illumination effect.
Description
Technical field
The present invention relates to a kind of light modulator, especially a kind of electronic light modulator that compatible voltage range is wide.
Background technique
Currently, light modulator on the market is since the power supply voltage different frequency of application is also different, e.g. 200V/
The 50Hz either power supply of 120V/60Hz, and traditional light modulator can only all adjust one of voltage and can only fit
For corresponding frequency, if the dimmer applications for adapting to 50Hz frequency will lead in 60Hz frequency lamp dodge etc. it is a series of
The phenomenon that, and dimming effect is very undesirable.
A type of light modulator may be only available for the voltage and frequency of the type as a result, when causing the people to use very
Inconvenience, dimming effect is poor, while there are also some potential safety problemss.
Summary of the invention
In order to solve the above technical problems, and a kind of automatic governing frequency wide the object of the present invention is to provide compatible voltage range
Electronic light modulator.
The technical solution adopted by the present invention is that:
A kind of electronic light modulator that compatible voltage range is wide, including,
Main control module and LED light-adjusting module, LED light-adjusting module are electric with the LED drive module of main control module and outside respectively
Property connection, with by LED drive module driving LED load running；
Power module is used for external power conversion as main control module, the power supply of LED light-adjusting module；
Zero point synchronous detection module is electrically connected with external alternating current or power module to detect frequency signal, zero
Point synchronous detection module and main control module are electrically connected so that frequency signal to be input in main control module, and main control module is according to frequency
Signal modulation goes out the PWM duty cycle being adapted to external alternating current and is output to LED light-adjusting module, and by LED light-adjusting module tune
Dim signal is made drives LED load to operate into LED drive module.
The zero point synchronous detection module includes rectification circuit, resistor voltage divider circuit and NPN type triode Q5；
The input terminal of rectification circuit and external alternating current are electrically connected, the input terminal and rectification circuit of resistor voltage divider circuit
Output end be electrically connected with to direct current decompression handle, the base stage of triode Q5 and the output end of resistor voltage divider circuit electrically connect
It connects, the collector and power module of triode Q5 is electrically connected, and emitter and the main control module of triode Q5 is electrically connected with defeated
Enter frequency signal.
The LED light-adjusting module includes NPN type triode Q4, PNP type triode Q3, the metal-oxide-semiconductor for following circuit, N-channel
The metal-oxide-semiconductor Q8 of Q7 and N-channel；
The base stage and main control module of triode Q4 is electrically connected, the emitter ground connection of triode Q4；
The base stage of triode Q3 is connect with the collector of triode Q4, and the emitter of triode Q3 electrically connects with power module
It connects, the collector of triode Q3 and the input terminal of circuit is followed to be electrically connected；
The output end of circuit is followed to be electrically connected respectively with the grid of the grid of metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8；
The drain electrode of metal-oxide-semiconductor Q7 and LED drive module are electrically connected, and LED drive module and the L of external communication electricity extremely electrically connect
It connects, the source electrode ground connection of metal-oxide-semiconductor Q7；
The drain electrode of metal-oxide-semiconductor Q8 and the pole N of external communication electricity are electrically connected, the source electrode ground connection of metal-oxide-semiconductor Q8.
It is described that follow circuit include PNP type triode Q1 and NPN type triode Q2；
The base stage of triode Q1 is electrically connected with the collector of the base stage of triode Q2 and triode Q3 respectively, triode Q1
Emitter respectively with the grid of the emitter of triode Q2, the grid of metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 be electrically connected, triode Q1
Grounded collector；
The collector and power module of triode Q2 is electrically connected.
The power module includes rectification chip, switching power circuit and linear regulator chip；
The input terminal of rectification chip and external alternating current are electrically connected, the output end and switching power circuit of rectification chip
Input terminal be electrically connected, the output end of the switching power circuit current collection with the emitter of triode Q3 and triode Q2 respectively
The input terminal electric connection of pole, linear regulator chip is to provide driving voltage, the output of linear regulator chip for LED light-adjusting module
End is electrically connected with main control module using the voltage after being depressured as master control module for power supply.
It further include the temperature protection module for detecting LED light-adjusting module temperature information, main control module and temperature protection mould
Block is electrically connected with out of service when the temperature is excessively high in LED light-adjusting module.
The temperature protection module includes detecting thermistor NTC, the divider resistance of the temperature information of LED light-adjusting module
R14 and capacitor C9, the one end thermistor NTC and power module are electrically connected, and the other end is electric with main control module, partial pressure respectively
One end of one end and capacitor C9 for hindering R14 is electrically connected, the other end of divider resistance R14 and another termination of capacitor C4
Ground.
It further include light modulation input module, the light modulation input module and main control module are electrically connected to input and adjust to main control module
Photocontrol information.
Beneficial effects of the present invention:
Electronic light modulator of the present invention be adjusted alternating voltage using Switching Power Supply, and supplies for posterior elements
Electricity accomplishes that supply district expands to 90V-270V for electric energy using Switching Power Supply, and guarantees to stablize output, the synchronous detection of zero point
Module detects the frequency signal of alternating current, and is input to main control module, and main control module handles frequency signal, adjusts simultaneously
It produces PWM duty cycle to be output in LED light-adjusting module, and dim signal is modulated into LED drive module by LED light-adjusting module
Middle driving LED load running, can be adapted to the alternating current of access, reach good illumination effect.
Detailed description of the invention
A specific embodiment of the invention is described further with reference to the accompanying drawing.
Fig. 1 is the schematic diagram of electronic light modulator of the present invention.
Fig. 2 is the circuit diagram of power module.
Fig. 3 is the circuit diagram of zero point synchronous detection module.
Fig. 4 is the circuit diagram of main control module.
Fig. 5 is the circuit diagram of temperature protection module.
Fig. 6 is the circuit diagram for dimming input module.
Fig. 7 is the circuit diagram of LED light-adjusting module.
Specific embodiment
As shown in Figure 1, electronic light modulator of the present invention, including main control module 1, LED light-adjusting module 2, power module 4, zero point
Synchronous detection module 5, LED light-adjusting module 2 are electrically connected with main control module 1, external LED drive module 3 respectively, power module
4 are used for external power conversion as main control module 1, the power supply of LED light-adjusting module 2, zero point synchronous detection module 5 and external friendship
Galvanic electricity or power module 4 are electrically connected to detect frequency signal, and zero point synchronous detection module 5 and main control module 1 are electrically connected
Frequency signal to be input in main control module 1, main control module 1 is adapted to external alternating current out according to frequency signal modulation
PWM duty cycle is output to LED light-adjusting module 2, and is modulated into dim signal into LED drive module 3 by LED light-adjusting module 2
Drive LED load running.
Wherein, as shown in Fig. 2, power module 4 includes rectification chip 41, switching power circuit 42, linear regulator chip 43,
Rectification chip 41 uses conventional rectification chip, in 42 the design preferred embodiment of switching power circuit using LNK574 chip and its
Accessory circuit, the range of input voltage in 90V-270V, the design using single fiery way to take power, by LNK574 chip and its
Accessory circuit exports 12V supply voltage, and voltage is further depressured to 3.3V for master control by linear regulator chip 43
Module 1 is powered.
As shown in figure 4, the main control module 1 of the design uses STM32L super low-power consumption series monolithic, running current
For 2mA, operating voltage 3.3V, so that the design energy consumption is lower.
As shown in figure 3, zero point synchronous detection module 5 includes rectification circuit 51, resistor voltage divider circuit 52, NPN type triode
Q5, the input terminal of rectification circuit 51 and external alternating current are electrically connected, the input terminal and rectification circuit of resistor voltage divider circuit 52
51 output end is electrically connected to handle direct current decompression, the base stage of triode Q5 and the output end electricity of resistor voltage divider circuit 52
Property connection, the collector of triode Q5 and power module 4 be electrically connected, and the emitter and 1 electrical property of main control module of triode Q5 connects
It connects with input frequency signal.
Rectification circuit 51 includes filter capacitor CX1, diode D1, diode D2, one end of filter capacitor CX1 and diode
The anode and firewire of D1 connects, and the other end of filter capacitor CX1 is connect with the anode of diode D2 and zero curve, diode D1
Cathode, diode D2 cathode connection and the output end as rectification circuit 51, resistor voltage divider circuit 52 include resistance
R14, resistance R5, resistance R6, capacitor C12, resistance R14, resistance R5 are in parallel, the one end resistance R6 respectively with the one end resistance R14, capacitor
The base stage electric connection (i.e. resistance R6 connects with resistance R14, resistance R5) of the one end C12, triode Q5, the other end of resistance R14
It is electrically connected with the output end of rectification circuit 51, the other end of resistance R6 and the other end ground connection of capacitor.
Alternating current is filtered from rectification circuit 51, rectifies output, and by electric resistance partial pressure, driving triode Q5 is switched, and
And frequency signal is input in main control module 1.
The design be adjusted alternating voltage using Switching Power Supply, and powers for posterior elements, using switch
Power supply power supply can accomplish that supply district expands to 90V-270V, and guarantee to stablize output, and the detection of zero point synchronous detection module 5 is handed over
The frequency signal of galvanic electricity, and it is input to main control module 1, main control module 1 handles frequency signal, while modulating PWM
Duty ratio is output in LED light-adjusting module 2, is modulated into dim signal into LED drive module 3 by LED light-adjusting module 2 and is driven
LED load running, can be adapted to the alternating current of access, reach good illumination effect.
And the embodiment of the LED drive circuit of the design is, LED light-adjusting module 2 includes NPN type triode Q4, positive-negative-positive three
Pole pipe Q3, the metal-oxide-semiconductor Q8 for following circuit 21, the metal-oxide-semiconductor Q7 of N-channel and N-channel；The base stage and main control module 1 of triode Q4
It is electrically connected, the emitter ground connection of triode Q4；The base stage of triode Q3 is connect with the collector of triode Q4, triode Q3's
Emitter and power module 4 are electrically connected, and the collector of triode Q3 and the input terminal of circuit 21 are followed to be electrically connected；
The output end of circuit 21 is followed to be electrically connected respectively with the grid of the grid of metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8；Metal-oxide-semiconductor Q7
Drain electrode and LED drive module 3 be electrically connected, the pole the L electric connection of LED drive module 3 and external communication electricity, metal-oxide-semiconductor Q7's
Source electrode ground connection；The drain electrode of metal-oxide-semiconductor Q8 and the pole N of external communication electricity are electrically connected, the source electrode ground connection of metal-oxide-semiconductor Q8.
Follow circuit 21 include PNP type triode Q1 and NPN type triode Q2, the base stage of triode Q1 respectively with triode
The collector of the base stage of Q2 and triode Q3 are electrically connected, the emitter of triode Q1 respectively with the emitter of triode Q2, MOS
The grid of pipe Q7 and the grid of metal-oxide-semiconductor Q8 are electrically connected, the grounded collector of triode Q1, the collector and power supply of triode Q2
Module 4 is electrically connected.
Meanwhile the input terminal of rectification chip 41 and external alternating current are electrically connected, the output end of rectification chip 41 with open
The input terminal of powered-down source circuit 42 is electrically connected, the output end of switching power circuit 42 respectively with the emitter of triode Q3, three
The collector of pole pipe Q2 and the input terminal of linear regulator chip 43 are electrically connected to provide driving voltage for LED light-adjusting module 2,
The output end of linear regulator chip 43 is electrically connected with main control module 1 the voltage after decompression to be powered as main control module 1, is switched
The 12V voltage that power circuit 42 exports is that LED light-adjusting module 2 provides driving voltage.
Main control module 1 is integrated out according to frequency signal between the base stage and emitter of corresponding PWM duty cycle triode Q4
A resistance R24 is connected, main control module 1 exports PWM duty cycle signal, adjusts the on-state rate of triode Q4, the base stage of triode Q3
A resistance R17 is connected between emitter, triode Q4 conducting drags down the base level of triode Q3, and triode Q3 is connected, and
And pass the signal to and follow circuit 21, follow circuit 21 to output a signal to metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q8, metal-oxide-semiconductor Q7, metal-oxide-semiconductor
Q8 conducting, alternating current act directly on the both ends of LED drive module 3, and electric current is from the drain electrode of metal-oxide-semiconductor Q7 or metal-oxide-semiconductor Q8
Source electrode is flowed into, and flows into ground wire, the turn-on and turn-off that the design PWM duty cycle signal passes through control metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8
Copped wave is cut after carrying out, so that LED drive module 3 be driven to operate, then LED load is connected by LED drive module 3, reaches light modulation
Effect.
In addition to this, as shown in figure 5, the design further includes the temperature protection for detecting 2 temperature information of LED light-adjusting module
Module 6, main control module 1 are electrically connected with temperature protection module 6 with out of service when the temperature is excessively high in LED light-adjusting module 2.
The preferred embodiment of temperature protection module 6 is that the temperature protection module 6 includes detection LED light-adjusting module 2 herein
Temperature information thermistor NTC, divider resistance R14 and capacitor C9, the one end thermistor NTC and the electricity of power module 4
Property connection, the other end respectively with one end of main control module 1, one end of divider resistance R14 and capacitor C9 be electrically connected, partial pressure electricity
It hinders the other end of R14 and the other end ground connection of capacitor C4, thermistor NTC is used to detect the temperature of metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8
Degree then turns off electronic light modulator operation when temperature is excessively high.
As shown in fig. 6, the design further includes light modulation input module 7, which electrically connects with main control module 1
It connecing to input dimmer control information to main control module 1, dimmer control information can be generated by the setting program of main control module 1,
It can be inputted by the external world, dim input module 7 as external world's input dim signal and provide means, dim input module 7 herein and adopt
Partial pressure light modulation is carried out with adjustable resistance.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to above embodiment, as long as with
Essentially identical means realize that the technical solution of the object of the invention belongs within protection scope of the present invention.
Claims (7)
1. a kind of electronic light modulator that compatible voltage range is wide characterized by comprising
Main control module (1) and LED light-adjusting module (2), LED light-adjusting module (2) drive with main control module (1) and the LED of outside respectively
Dynamic model block (3) is electrically connected, by LED drive module (3) driving LED load running；
Power module (4) is used for external power conversion as main control module (1), LED light-adjusting module (2) power supply；
Zero point synchronous detection module (5) is electrically connected with external alternating current or power module (4) to detect frequency signal,
Zero point synchronous detection module (5) and main control module (1) are electrically connected the master control frequency signal to be input in main control module (1)
Module (1) goes out the PWM duty cycle being adapted to external alternating current according to frequency signal modulation and is output to LED light-adjusting module (2), and
And dim signal driving LED load running into LED drive module (3) is modulated by LED light-adjusting module (2)；
The LED light-adjusting module (2) includes NPN type triode Q4, PNP type triode Q3, the MOS for following circuit (21), N-channel
The metal-oxide-semiconductor Q8 of pipe Q7 and N-channel；
The base stage of triode Q4 and main control module (1) are electrically connected, the emitter ground connection of triode Q4；
The base stage of triode Q3 is connect with the collector of triode Q4, and the emitter of triode Q3 electrically connects with power module (4)
It connects, the collector of triode Q3 and the input terminal of circuit (21) is followed to be electrically connected；
The output end of circuit (21) is followed to be electrically connected respectively with the grid of the grid of metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8；
The drain electrode of metal-oxide-semiconductor Q7 and LED drive module (3) are electrically connected, and LED drive module (3) and the L of external communication electricity are extremely electrical
Connection, the source electrode ground connection of metal-oxide-semiconductor Q7；
The drain electrode of metal-oxide-semiconductor Q8 and the pole N of external communication electricity are electrically connected, the source electrode ground connection of metal-oxide-semiconductor Q8.
2. a kind of wide electronic light modulator of compatible voltage range according to claim 1, it is characterised in that: the zero point is same
Walking detection module (5) includes rectification circuit (51), resistor voltage divider circuit (52) and NPN type triode Q5；
The input terminal of rectification circuit (51) and external alternating current are electrically connected, the input terminal of resistor voltage divider circuit (52) and rectification
The output end of circuit (51) is electrically connected to handle direct current decompression, base stage and resistor voltage divider circuit (52) of triode Q5
Output end is electrically connected, and the collector of triode Q5 and power module (4) are electrically connected, the emitter and master control mould of triode Q5
Block (1) is electrically connected with input frequency signal.
3. a kind of wide electronic light modulator of compatible voltage range according to claim 2, it is characterised in that: described to follow electricity
Road (21) includes PNP type triode Q1 and NPN type triode Q2；
The base stage of triode Q1 is electrically connected with the collector of the base stage of triode Q2 and triode Q3 respectively, the hair of triode Q1
Emitter-base bandgap grading is electrically connected with the grid of the emitter of triode Q2, the grid of metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 respectively, triode Q1's
Grounded collector；
The collector of triode Q2 and power module (4) are electrically connected.
4. a kind of wide electronic light modulator of compatible voltage range according to claim 3, it is characterised in that: the power supply mould
Block (4) includes rectification chip (41), switching power circuit (42) and linear regulator chip (43)；
The input terminal of rectification chip (41) and external alternating current are electrically connected, the output end and Switching Power Supply of rectification chip (41)
The input terminal of circuit (42) is electrically connected, the output end of switching power circuit (42) respectively with the emitter of triode Q3, three poles
The input terminal electric connection of the collector and linear regulator chip (43) of pipe Q2 thinks that LED light-adjusting module (2) provide driving electricity
Pressure, the output end of linear regulator chip (43) and main control module (1) are electrically connected using the voltage after being depressured as main control module (1)
Power supply.
5. a kind of wide electronic light modulator of compatible voltage range according to claim 1, it is characterised in that: further include being used for
The temperature protection module (6) of LED light-adjusting module (2) temperature information is detected, main control module (1) and temperature protection module (6) are electrically
Connection is with out of service when the temperature is excessively high in LED light-adjusting module (2).
6. a kind of wide electronic light modulator of compatible voltage range according to claim 5, it is characterised in that: the temperature is protected
Thermistor NTC, divider resistance R14 and the capacitor C9 that module (6) include the temperature information of detection LED light-adjusting module (2) are protected,
The one end thermistor NTC and power module (4) are electrically connected, the other end respectively with main control module (1), divider resistance R14
One end and one end of capacitor C9 are electrically connected, the other end of divider resistance R14 and the other end ground connection of capacitor C4.
7. a kind of wide electronic light modulator of compatible voltage range according to claim 1, it is characterised in that: further include light modulation
Input module (7), the light modulation input module (7) and main control module (1) are electrically connected to input brightness adjustment control to main control module (1)
Information.
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| CN201710481138.1A CN107172752B (en) | 2017-06-22 | 2017-06-22 | A kind of electronic light modulator that compatible voltage range is wide |
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| CN108200689A (en) * | 2018-01-05 | 2018-06-22 | 成都世纪光合作用科技有限公司 | LED illumination device light synchronization system based on alternating current voltage zero crossing |
| CN108419346A (en) * | 2018-03-20 | 2018-08-17 | 佛山市瑰栗服装材料有限公司 | A kind of spinning and weaving workshop lamp light control method |
| CN108449852A (en) * | 2018-03-20 | 2018-08-24 | 佛山市瑰栗服装材料有限公司 | A kind of spinning and weaving workshop light control terminal |
| CN109302785B (en) * | 2018-10-19 | 2020-07-17 | 上海亚明照明有限公司 | Phase-cut dimming control device, method and readable storage medium |
| CN110022635A (en) * | 2019-04-11 | 2019-07-16 | 深圳市金流明光电技术有限公司 | A kind of digital light adjuster over-temperature detecting method and system |
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| KR0145094B1 (en) * | 1994-10-12 | 1998-10-01 | 이종수 | Romote transmission method and system of dimming control system |
| CN102202448B (en) * | 2011-06-04 | 2013-12-18 | 魏其萃 | Light dimming control device for light-emitting diode (LED) illumination |
| CN102984873B (en) * | 2012-12-27 | 2018-07-20 | 莱得圣智能科技（上海）有限公司 | One wire system intelligently takes electric electronic dimming system |
| CN203549457U (en) * | 2013-09-29 | 2014-04-16 | 刘付光 | Stepless dimming-type LED (light emitting diode) lamp |
| CN203504845U (en) * | 2013-10-21 | 2014-03-26 | 上海欧切斯实业有限公司 | Control device capable of realizing AC phase cut by MOSFET |
| CN204180346U (en) * | 2014-10-20 | 2015-02-25 | 上海大学 | A kind of programmable lamp drive unit |
| CN204836717U (en) * | 2015-08-13 | 2015-12-02 | 浙江科技学院 | Brain electric control reading lamp |
| CN105491723B (en) * | 2015-12-31 | 2017-07-25 | 茂硕电源科技股份有限公司 | A kind of light adjusting circuit system |
| CN207219090U (en) * | 2017-06-22 | 2018-04-10 | 中山市智观照明科技有限公司 | A kind of wide electronic light modulator of compatible voltage range |
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