CN101861006A - Dimming control circuit and illumination device - Google Patents
Dimming control circuit and illumination device Download PDFInfo
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- CN101861006A CN101861006A CN201010147149A CN201010147149A CN101861006A CN 101861006 A CN101861006 A CN 101861006A CN 201010147149 A CN201010147149 A CN 201010147149A CN 201010147149 A CN201010147149 A CN 201010147149A CN 101861006 A CN101861006 A CN 101861006A
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Abstract
The invention provides a dimming control circuit and an illumination device, belonging to the illumination field. The dimming control circuit comprises a signal transceiver module, an MCU control module and a digital-to-analog conversion module which are sequentially connected; the signal transceiver module receives externally input differential signals and outputs level signals after rectification and voltage division processing; the output end of the digital-to-analog conversion module is connected with the input end of a dimming ballast; the feedback input end of the MCU control module is connected with the feedback output end of the dimming ballast; the MCU control module processes the level signals and outputs digital dimming control signals; and the digital-to-analog conversion module converts the digital dimming control signals into analog voltage control signals and regulates the brightness of an LED lamp through the dimming ballast. The dimming control circuit provided by the invention converts the dimming control signals into the analog voltage control signals and regulates the brightness of the LED lamp through the dimming ballast; and the reliability and the uniformity are improved.
Description
Technical field
The invention belongs to lighting field, relate in particular to a kind of adjusting control circuit and lighting device.
Background technology
Fig. 1 shows the module principle figure of traditional adjusting control circuit, and adjusting control circuit 2 comprises MCU control module 22 and LC filtration module 20; Wherein the user by user input device 1 (such as: potentiometer etc.) output dim signal, collect the corresponding pwm signal of output behind this dim signal by MCU control module 22, LC filtration module 20 converts this pwm signal to aanalogvoltage output, dimming ballast 3 is regulated control according to the analog voltage signal of adjusting control circuit 2 outputs to the brightness of LED lamp 4, thereby the realization dim signal is exported in the mode of aanalogvoltage.
Yet, since adopt be the simple potential device as the dim signal input equipment, therefore, the distance between user input device 1 and the MCU control module 22 can only be in several meters scope, and a light modulation equipment can only be controlled a light fixture, is unfavorable for the centralized control of light fixture so in large-scale occasion.In addition, the output of light modulation aanalogvoltage is to produce by filter circuit by MCU control module 22 output pwm signals, like this, and when producing in batches, the output consistency of aanalogvoltage is very poor, because the difference of the components and parts in the LC filtration module 20 causes the output of aanalogvoltage to be floated.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of adjusting control circuit, is intended to solve the problem of existing adjusting control circuit poor reliability, consistency difference.
The embodiment of the invention is achieved in that a kind of adjusting control circuit, comprising: the signal transmitting and receiving module of Lian Jieing, MCU control module and D/A converter module in turn; Described signal transmitting and receiving module receives the differential signal of outside input, carries out outputs level signals after the rectification and voltage division processing; The output of described D/A converter module is connected to the input of dimming ballast; The feedback input end of described MCU control module is connected to the feedback output end of described dimming ballast; Described MCU control module is handled back output digital dimming control signal with described level signal; Described D/A converter module is converted to the aanalogvoltage control signal with described digital dimming control signal, and by described dimming ballast the brightness of LED lamp is regulated.
Further, described MCU control module comprises: control chip U1 and peripheral circuit thereof; Described control chip U1 is that model is the control chip of AT90PWM2B.
Further, described signal transmitting and receiving module comprises: rectification unit, the first photoelectrical coupler U2, the second photoelectrical coupler U3, switching tube, diode D2, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and resistance R 8; The input of described rectification unit receives the differential signal of outside input; The negative electrode of diode D2 is connected to the output of described rectification unit, and the anode of diode D2 is connected to the anode of the diode among the first photoelectrical coupler U2 by resistance R 1; The minus earth of diode among the first photoelectrical coupler U2; The collector electrode of triode is connected to power supply VCC among the first photoelectrical coupler U2, resistance R 3 and resistance R 8 ground connection of the emitter of triode by being connected in series successively among the first photoelectrical coupler U2; The end that is connected in series of resistance R 3 and resistance R 8 is connected to the 12nd pin of described control chip U1; The anode of diode is connected to described power supply VCC by resistance R 2 among the second photoelectrical coupler U3, and the negative electrode of diode is connected to the 5th pin of described control chip U1 among the second photoelectrical coupler U3; The collector electrode of triode is connected to the output of described rectification unit among the second photoelectrical coupler U3, and the emitter of triode is by resistance R 5 ground connection among the second photoelectrical coupler U3; Described control end of switching tube is connected to the emitter of triode among the described second photoelectrical coupler U3 by resistance R 4, and an end of described switching tube is connected to the collector electrode of triode among the second photoelectrical coupler U3, the other end ground connection of described switching tube.
Further, described switching tube is triode Q1, and the base stage of described triode Q1 is as described control end of switching tube, and the collector electrode of described triode Q1 is as an end of described switching tube, and the emitter of described triode Q1 is as the other end of described switching tube.
Further, described D/A converter module comprises: analog-digital chip U4; Described analog-digital chip U4 is that model is the integrated chip of TLC5620; Wherein the 6th pin DATA of analog-digital chip U4 is connected to the 16th pin of described control chip U1; The 7th pin CLK of analog-digital chip U4 is connected to the 15th pin of described control chip U1; The 8th pin LOAD of analog-digital chip U4 is connected to the 14th pin of described control chip U1; The 13rd pin LDAC of analog-digital chip U4 is connected to the 13rd pin of described control chip U1.
Another purpose of the embodiment of the invention is to provide a kind of lighting device, and it comprises user input device, adjusting control circuit, dimming ballast and the LED lamp that connects in turn; Described adjusting control circuit is above-mentioned adjusting control circuit.
Adjusting control circuit provided by the invention adopts the signal transmitting and receiving module to receive the differential signal of outside input, and the MCU control module is handled back output dimming control signal with the output of signal transmitting and receiving module; D/A converter module is converted to the aanalogvoltage control signal with dimming control signal, and by dimming ballast control is regulated in the brightness of LED lamp; Reliability and consistency have been improved.
Description of drawings
Fig. 1 is the modular structure schematic diagram of the adjusting control circuit that provides of prior art;
Fig. 2 is the modular structure schematic diagram of the adjusting control circuit that provides of the embodiment of the invention;
Fig. 3 is the circuit diagram of signal transmitting and receiving module in the adjusting control circuit that provides of the embodiment of the invention;
Fig. 4 is the circuit diagram of MCU control module and D/A converter module in the adjusting control circuit that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The adjusting control circuit that the embodiment of the invention provides adopts the signal transmitting and receiving module to receive the differential signal of outside input, and the MCU control module is handled back output dimming control signal with the unidirectional digital signal of signal transmitting and receiving module output; D/A converter module is converted to the aanalogvoltage control signal with dimming control signal, and by dimming ballast control is regulated in the brightness of LED lamp.
Fig. 2 shows the modular structure principle of the adjusting control circuit that inventive embodiments provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention, and details are as follows.
Adjusting control circuit 2 comprises: the signal transmitting and receiving module 21 of Lian Jieing, MCU control module 22 and D/A converter module 23 in turn; Wherein, the output of D/A converter module 23 is connected to the input of dimming ballast 3; The feedback input end of MCU control module 22 is connected to the feedback output end of dimming ballast 3;
Signal transmitting and receiving module 21 receives the differential signal of outside input, carries out outputs level signals after the rectification and voltage division processing; MCU control module 22 is handled back output digital dimming control signal with the level signal of signal transmitting and receiving module 21 outputs; D/A converter module 23 is converted to the aanalogvoltage control signal with the digital dimming control signal, and regulates by the brightness of 3 pairs of LED lamps 4 of dimming ballast.
Compare with traditional adjusting control circuit, the embodiment of the invention changes the analog voltage signal of input into digital signal, has improved reliability and transmission range; Adopt D/A converter module output aanalogvoltage control signal control to be regulated in the brightness of LED lamp, good reliability, high conformity simultaneously.
Fig. 3 and Fig. 4 show the physical circuit of adjusting control circuit respectively; For convenience of explanation, only show the part relevant with the embodiment of the invention, details are as follows.
D/A converter module 23 comprises: analog-digital chip U4; Wherein can to adopt model be the integrated analog-digital chip of TLC5620 to analog-digital chip U4.Analog-digital chip U4 comprises 14 pins, the 1st pin GND ground connection, and the 2nd pin REFA is connected to the 14th pin VDD; The 3rd pin REFB, the 4th pin REFC, the 5th pin REFD is all unsettled does not connect; The 6th pin DATA is connected to the 16th pin of control chip U1; The 7th pin CLK is connected to the 15th pin of control chip U1; The 8th pin LOAD is connected to the 14th pin of control chip U1; The 9th pin DACD, the 10th pin DACC, the 11st pin DACB, the 12nd pin DACA is all unsettled does not connect; The 13rd pin LDAC is connected to the 13rd pin of control chip U1.
Signal transmitting and receiving module 21 comprises: rectification unit, the first photoelectrical coupler U2, the second photoelectrical coupler U3, switching tube, diode D2, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and resistance R 8; Wherein, the input of rectification unit receives the differential signal of outside input, and the negative electrode of diode D2 is connected to the output of described rectification unit, and the anode of diode D2 is connected to the anode of the diode among the first photoelectrical coupler U2 by resistance R 1; The minus earth of diode among the first photoelectrical coupler U2; The collector electrode of triode is connected to power supply VCC among the first photoelectrical coupler U2, resistance R 3 and resistance R 8 ground connection of the emitter of triode by being connected in series successively among the first photoelectrical coupler U2; The end that is connected in series of resistance R 3 and resistance R 8 is connected to the 12nd pin of described control chip U1; The anode of diode is connected to described power supply VCC by resistance R 2 among the second photoelectrical coupler U3, and the negative electrode of diode is connected to the 5th pin of described control chip U1 among the second photoelectrical coupler U3; The collector electrode of triode is connected to the output of described rectification unit among the second photoelectrical coupler U3, and the emitter of triode is by resistance R 5 ground connection among the second photoelectrical coupler U3; Described control end of switching tube is connected to the emitter of triode among the described second photoelectrical coupler U3 by resistance R 4, and an end of described switching tube is connected to the collector electrode of triode among the second photoelectrical coupler U3, the other end ground connection of described switching tube.
In embodiments of the present invention, after receiving differential signal, signal transmitting and receiving module 21 converts differential signal to unidirectional digital signal by rectification unit, carry out dividing potential drop through diode D2 and resistance R 1, make the photoelectrical coupler turn-on and turn-off, thereby make MCU control circuit 22 receive high/low level signal, same MCU control circuit 22 by on draw/drop-down level makes the unidirectional digital signal of photoelectrical coupler conducting/turn-off and export.
As one embodiment of the present of invention, switching tube can be triode Q1, and the base stage of triode Q1 is as described control end of switching tube, and the collector electrode of triode Q1 is as an end of switching tube, and the emitter of triode Q1 is as the other end of switching tube.
For the adjusting control circuit that illustrates that further the embodiment of the invention provides, it is as follows now in conjunction with Fig. 1-Fig. 3 in detail its operation principle to be described in detail:
Signal transmitting and receiving module 21 receives differential signals, carries out outputs level signals after the rectification and voltage division processing; Convert D/A converting circuit 23 executable digital dimming control signals after MCU control circuit 22 is handled the level signal that receives to, and start D/A converting circuit 23; Digital dimming control signal with 22 outputs of MCU control circuit after D/A converting circuit 23 starts converts 0 to 5 volt aanalogvoltage control signal to; Dimming ballast 3 is controlled the light modulation of LED lamp 4 according to the aanalogvoltage control signal, thereby has realized exporting the function of 0 to 5 volt of dim signal.
In embodiments of the present invention, the input mode of employing digital signal has improved the reliability and the transmission range of signal, adopts digital-to-analogue conversion integrated chip output analog voltage signal simultaneously, has improved reliability and consistency.In addition, a main control device can be controlled a plurality of light fixtures simultaneously, has increased range of application, adopts digital controlly, and the CAN bus protocol has been realized Long-distance Control, multi-stage cascade.The integrated level height makes circuit more simple and reliable simultaneously.Make that the lamp applications of light modulation is more extensive.
The adjusting control circuit that the embodiment of the invention provides is mainly used in the lighting device control is regulated in the brightness of LED lamp.This lighting device comprises user input device 1, adjusting control circuit 2, dimming ballast 3 and the LED lamp 4 that connects in turn; Wherein, the physical circuit of adjusting control circuit 2 has had very detailed description hereinbefore, does not repeat them here; User input device is made up of man-machine interface input controller and differential signaling transceiver, and at first by man-machine interface input controller output digital signal, digital signal converts digital signal to differential signal by the differential signaling transceiver identical with the design.Be transferred to adjusting control circuit then.
Adjusting control circuit provided by the invention adopts the signal transmitting and receiving module to receive the differential signal of outside input, and the MCU control module is handled back output dimming control signal with the output of signal transmitting and receiving module; D/A converter module is converted to the aanalogvoltage control signal with dimming control signal, and by dimming ballast control is regulated in the brightness of LED lamp; Reliability and consistency have been improved.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. an adjusting control circuit is characterized in that, comprising:
The signal transmitting and receiving module of Lian Jieing, MCU control module and D/A converter module in turn; Described signal transmitting and receiving module receives the differential signal of outside input, carries out outputs level signals after the rectification and voltage division processing;
The output of described D/A converter module is connected to the input of dimming ballast;
The feedback input end of described MCU control module is connected to the feedback output end of described dimming ballast; Described MCU control module is handled back output digital dimming control signal with described level signal; Described D/A converter module is converted to the aanalogvoltage control signal with described digital dimming control signal, and by described dimming ballast the brightness of LED lamp is regulated.
2. adjusting control circuit as claimed in claim 1 is characterized in that, described MCU control module comprises: control chip U1 and peripheral circuit thereof; Described control chip U1 is that model is the control chip of AT90PWM2B.
3. adjusting control circuit as claimed in claim 2 is characterized in that, described signal transmitting and receiving module comprises:
Rectification unit, the first photoelectrical coupler U2, the second photoelectrical coupler U3, switching tube, diode D2, resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5 and resistance R 8;
The input of described rectification unit receives the differential signal of outside input;
The negative electrode of diode D2 is connected to the output of described rectification unit, and the anode of diode D2 is connected to the anode of diode among the first photoelectrical coupler U2 by resistance R 1;
The minus earth of diode among the first photoelectrical coupler U2; The collector electrode of triode is connected to power supply VCC among the first photoelectrical coupler U2, resistance R 3 and resistance R 8 ground connection of the emitter of triode by being connected in series successively among the first photoelectrical coupler U2;
The end that is connected in series of resistance R 3 and resistance R 8 is connected to the 12nd pin of described control chip U1;
The anode of diode is connected to described power supply VCC by resistance R 2 among the second photoelectrical coupler U3, and the negative electrode of diode is connected to the 5th pin of described control chip U1 among the second photoelectrical coupler U3; The collector electrode of triode is connected to the output of described rectification unit among the second photoelectrical coupler U3, and the emitter of triode is by resistance R 5 ground connection among the second photoelectrical coupler U3;
Described control end of switching tube is connected to the emitter of triode among the described second photoelectrical coupler U3 by resistance R 4, and an end of described switching tube is connected to the collector electrode of triode among the second photoelectrical coupler U3, the other end ground connection of described switching tube.
4. adjusting control circuit as claimed in claim 3, it is characterized in that, described switching tube is triode Q1, the base stage of described triode Q1 is as described control end of switching tube, the collector electrode of described triode Q1 is as an end of described switching tube, and the emitter of described triode Q1 is as the other end of described switching tube.
5. adjusting control circuit as claimed in claim 2 is characterized in that, described D/A converter module comprises: analog-digital chip U4; Described analog-digital chip U4 is that model is the integrated chip of TLC5620; Wherein the 6th pin DATA of analog-digital chip U4 is connected to the 16th pin of described control chip U1; The 7th pin CLK of analog-digital chip U4 is connected to the 15th pin of described control chip U1; The 8th pin LOAD of analog-digital chip U4 is connected to the 14th pin of described control chip U1; The 13rd pin LDAC of analog-digital chip U4 is connected to the 13rd pin of described control chip U1.
6. lighting device, it comprises user input device, adjusting control circuit, dimming ballast and the LED lamp that connects in turn; It is characterized in that described adjusting control circuit is each described adjusting control circuit of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010147149 CN101861006B (en) | 2010-04-09 | 2010-04-09 | Dimming control circuit and illumination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010147149 CN101861006B (en) | 2010-04-09 | 2010-04-09 | Dimming control circuit and illumination device |
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| CN101861006A true CN101861006A (en) | 2010-10-13 |
| CN101861006B CN101861006B (en) | 2013-10-09 |
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| CN 201010147149 Expired - Fee Related CN101861006B (en) | 2010-04-09 | 2010-04-09 | Dimming control circuit and illumination device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102281672A (en) * | 2011-05-25 | 2011-12-14 | 张洪旗 | Lighting control system |
| CN102458016A (en) * | 2010-10-29 | 2012-05-16 | 南京迈瑞生物医疗电子有限公司 | Operating lamp as well as surgery field facula adjusting device and method of operating lamp |
| CN102811524A (en) * | 2011-05-31 | 2012-12-05 | 海洋王照明科技股份有限公司 | LED lamp and control circuit thereof |
| CN103987157A (en) * | 2014-04-01 | 2014-08-13 | 杭州电子科技大学 | LED lighting dimmable and controllable node controller |
| CN104185347A (en) * | 2014-08-29 | 2014-12-03 | 合肥美亚光电技术股份有限公司 | Adjustable light source system used for color selector and light source brightness adjusting method thereof |
| CN104684155A (en) * | 2013-11-28 | 2015-06-03 | 深圳市海洋王照明工程有限公司 | LED (light emitting diode) driving power supply dimming circuit and lamp |
| CN107707826A (en) * | 2017-09-29 | 2018-02-16 | 深圳怡化电脑股份有限公司 | The brightness adjusting method and device of light compensating lamp |
| CN108575020A (en) * | 2017-09-01 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of atmosphere lamp controller system |
| CN111556633A (en) * | 2020-05-26 | 2020-08-18 | 广州彩熠灯光股份有限公司 | Control circuit and lighting control system |
| CN108575020B (en) * | 2017-09-01 | 2024-04-23 | 常州星宇车灯股份有限公司 | Atmosphere lamp controller system |
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| CN102458016A (en) * | 2010-10-29 | 2012-05-16 | 南京迈瑞生物医疗电子有限公司 | Operating lamp as well as surgery field facula adjusting device and method of operating lamp |
| CN102281672A (en) * | 2011-05-25 | 2011-12-14 | 张洪旗 | Lighting control system |
| CN102811524B (en) * | 2011-05-31 | 2015-08-26 | 海洋王照明科技股份有限公司 | A kind of LED lamp and control circuit thereof |
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| CN103987157A (en) * | 2014-04-01 | 2014-08-13 | 杭州电子科技大学 | LED lighting dimmable and controllable node controller |
| CN103987157B (en) * | 2014-04-01 | 2016-04-06 | 杭州电子科技大学 | A kind of LED illumination tunable optical can control Node Controller |
| CN104185347A (en) * | 2014-08-29 | 2014-12-03 | 合肥美亚光电技术股份有限公司 | Adjustable light source system used for color selector and light source brightness adjusting method thereof |
| CN108575020A (en) * | 2017-09-01 | 2018-09-25 | 常州星宇车灯股份有限公司 | A kind of atmosphere lamp controller system |
| CN108575020B (en) * | 2017-09-01 | 2024-04-23 | 常州星宇车灯股份有限公司 | Atmosphere lamp controller system |
| CN107707826A (en) * | 2017-09-29 | 2018-02-16 | 深圳怡化电脑股份有限公司 | The brightness adjusting method and device of light compensating lamp |
| CN111556633A (en) * | 2020-05-26 | 2020-08-18 | 广州彩熠灯光股份有限公司 | Control circuit and lighting control system |
| CN111556633B (en) * | 2020-05-26 | 2023-05-05 | 广州彩熠灯光股份有限公司 | Control circuit and lighting control system |
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| CN101861006B (en) | 2013-10-09 |
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