CN103108461A - Light-emitting diode (LED) color temperature adjusting device - Google Patents
Light-emitting diode (LED) color temperature adjusting device Download PDFInfo
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- CN103108461A CN103108461A CN2013100284456A CN201310028445A CN103108461A CN 103108461 A CN103108461 A CN 103108461A CN 2013100284456 A CN2013100284456 A CN 2013100284456A CN 201310028445 A CN201310028445 A CN 201310028445A CN 103108461 A CN103108461 A CN 103108461A
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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
- Y02B20/72—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps in street lighting
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Abstract
The invention discloses a light-emitting diode (LED) color temperature adjusting device which comprises an input voltage sampling circuit, an in-phase proportion amplifying circuit, an amplitude limiting circuit, a proportion integration differentiation (PID) adjusting circuit, a phase modulation (PM) control circuit, an LED output circuit and a difference amplifying circuit. The input voltage sampling circuit samples voltage of an input power supply, the voltage of the input power supply is conditioned by the in-phase proportion amplifying circuit and a signal which can change in the same ratio of given change of bus direct current voltage is output. The signal undergoes amplitude limitation by the amplitude limiting circuit and outputs a reference signal to a positive pole input end of the PID adjusting circuit. A current sampling signal from the LED output circuit is amplified by the difference amplifying circuit and input to a negative pole input end of the PID adjusting circuit. An output pin of the PID adjusting circuit outputs a control feed back signal to the PM control circuit. After the control feed back signal is adjusted by a PM chip, a PM signal with required impulse width is output to a grid of a power tube Q1. The LED color temperature adjusting device can regulate brightness of an LED street lamp based on voltage difference of an electricity line so that aims of light adjusting and energy saving of the LED street lamp can be achieved.
Description
Technical field
The present invention relates to a kind of lighting technical field, especially relate to a kind of LED colour temperature adjuster.
Background technology
High-powered LED lamp is compared with conventional lamp, has advantages of efficient, safety, energy-saving and environmental protection, life-span length, fast response time, the high uniqueness of color rendering index, can be widely used in the illumination of the occasions such as urban road and tunnel.At present, the LED lamp generally adopts simple constant current control mode, pair technology that the LED street lamp carries out light modulation is also arranged, but generally all adopt single lamp to regulate way: each LED street lamp, adopt controllable constant current control mode, control signal adopts and draws separately pilot wire system, and the wireless communication transmissions of employing control model is also arranged, and also having a kind of is to adopt the power line using transmission means.Although can reach the purpose of dimming energy-saving, there is following problem in these modes: control complexity, make the LED driver reliability reduce; Cost is high, adopts the control line form of drawing separately, increases wiring cost and increases legacy system reducing energy consumption difficulty.
Summary of the invention
Technical problem to be solved by this invention is: a kind of LED colour temperature adjuster is provided, can be different according to the voltage on power circuit, and regulate the brightness of LED street lamp, thereby reach the energy-conservation purpose of LED street light modulating.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of LED colour temperature adjuster comprises input voltage sample circuit (1), in-phase proportion amplifying circuit (2), amplitude limiter circuit ⑶, PID regulating circuit ⑷, PM control circuit (5), LED output circuit (6) and differential amplifier circuit (7); The voltage of described input voltage sample circuit ⑴ sampling input power, nurse one's health through described in-phase proportion amplifying circuit (2), output can be pressed given bus DC voltage change and the signal that changes in proportion, after described amplitude limiter circuit (3) amplitude limit, output one base reference signal is to the electrode input end of described PID regulating circuit (4) again for this signal; Current sampling signal from described LED output circuit (6), after amplifying, described differential amplifier circuit (7) is input to the negative input of described PID regulating circuit (4), the output pin output one of described PID regulating circuit (4) is controlled feedback signal to described PM control circuit (5), after the PM chip was regulated, the PM signal of the required pulsewidth of output was to the grid of power tube Q1.
Preferably, described input voltage sample circuit (1) comprises resistance R 11, voltage-stabiliser tube DW1 and resistance R 12, one end of described resistance R 11 is connected with the pin 2 of described rectifier bridge BR1, the other end of described resistance R 11 is connected with the negative pole of described voltage-stabiliser tube DW1, the positive pole of described voltage-stabiliser tube DW1 connects an end of described resistance R 12, the other end ground connection of described resistance R 12, when the voltage that is added in voltage-stabiliser tube DW1 two ends was following lower than the voltage stabilizing value, the described base reference signal of output was close to zero.
Preferably, described amplitude limiter circuit (3) comprises resistance R 17 and voltage-stabiliser tube DW2, one end of described resistance R 17 connects the output of described in-phase proportion amplifying circuit ⑵, the other end of described resistance R 17 connects respectively the negative pole of described voltage-stabiliser tube DW2 and an input of described PID regulating circuit (4), the plus earth of described voltage-stabiliser tube DW2, after the magnitude of voltage of voltage higher than certain setting that is added in described voltage-stabiliser tube DW2 two ends, the LED lamp of final stage is pressed the constant current operation.
Adopted technique scheme, beneficial effect of the present invention is: this LED colour temperature adjuster can according to the difference of input feed voltage, be completed the control to LED street lamp illumination; The present invention can be applied to the illumination of traffic tunnel, also can be applicable to municipal road lamp group's illumination, according to different control requirements, allows the LED lamp that required stepless dimming illumination is provided; The present invention is by high-voltage power line, and both transferring energy, transmitted again the illumination control signal, and system cost is low, and is easy to use, and energy-saving effect is obvious.
Description of drawings
Fig. 1 is the circuit block diagram of the embodiment of the present invention;
Fig. 2 is the circuit diagram of the embodiment of the present invention;
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Fig. 1 and Fig. 2 were common, a kind of LED colour temperature adjuster comprised input voltage sample circuit 1, in-phase proportion amplifying circuit 2, amplitude limiter circuit 3, PID regulating circuit 4, PM control circuit 5, LED output circuit 6 and differential amplifier circuit 7.
Below the explanation more detailed to the present embodiment:
the live wire of input power and zero line are connected respectively the first pin and the 3rd pin of rectifier bridge BR1, direct voltage after rectification is from the second pin and the output of the 4th pin of BR1, wherein the second pin of BR1 connects by resistance R 11, the input voltage sample circuit 1 that voltage-stabiliser tube DW1 and resistance R 12 form, one end of the resistance R 12 of input voltage sample circuit 1 is via resistance R 13, R14, R15, resistance in the in-phase proportion amplifying circuit 2 that R16 and integrated circuit (model m324) form adds to the voltage signal of input power the 3rd pin of integrated circuit, the second pin ground connection of U2A, voltage signal is after 2 conditionings of in-phase proportion amplifying circuit, the first pin by U2A is exported the signal that can press given bus DC voltage change and change in proportion, after the amplitude limiter circuit 3 of this signal via resistance R 17 and voltage-stabiliser tube DW2 composition, output one reference (light modulation) reference signal is to PID regulating circuit 4, PID regulating circuit 4 is by resistance R 18, R20, R21, electric capacity and integrated circuit form, base reference signal from amplitude limiter circuit 3 is transported to the tenth pin (positive pole) of integrated circuit U2C through resistance, meanwhile, the current sampling resistor that is serially connected on LED output circuit 6 outputs to current sampling signal by resistance R 24, R25, R26, the differential amplifier circuit 7 that R27 and integrated circuit U2D form, signal is outputed to the 9th pin (negative pole) of integrated circuit after this circuit differential amplification, after this two paths of signals is regulated through PID, controlled the FB end of feedback signal control chip U1 (model UC3854) to the PM control circuit 5 by the 8th pin output one of U2C, adjusting through control chip U1, export the PM signal of required pulsewidth to the grid of power MOSFET tube Q1, control the duty cycle of switching of Q1, thereby make the LED street lamp obtain required constant current.
The present invention can reach following effect by the voltage stabilizing value of DW1 and DW2 rationally is set: when following lower than DWi voltage stabilizing value, the light modulation reference signal of output is close to 0; And the DW2 in amplitude limiter circuit 3, after making power lead higher than certain magnitude of voltage, LED can press the constant current operation, like this, can guarantee that after higher than this setting voltage the inconsistent situation of brightness of the different LED lamp that causes because of circuit differences is avoided in the permanent brightness output of LED.
In sum, this LED colour temperature adjuster can according to the difference of input feed voltage, be completed the control to LED street lamp illumination; The present invention can be applied to the illumination of traffic tunnel, also can be applicable to municipal road lamp group's illumination, according to different control requirements, allows the LED lamp that required stepless dimming illumination is provided; The present invention is by high-voltage power line, and both transferring energy, transmitted again the illumination control signal, and system cost is low, and is easy to use, and energy-saving effect is obvious.
The present invention is not limited to above-mentioned concrete execution mode, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done are within all dropping on protection scope of the present invention.
Claims (3)
1. LED colour temperature adjuster, it is characterized in that, comprise input voltage sample circuit (1), in-phase proportion amplifying circuit (2), amplitude limiter circuit ⑶, PID regulating circuit ⑷, PM control circuit (5), LED output circuit (6) and differential amplifier circuit (7);
The voltage of described input voltage sample circuit ⑴ sampling input power, nurse one's health through described in-phase proportion amplifying circuit (2), output can be pressed given bus DC voltage change and the signal that changes in proportion, after described amplitude limiter circuit (3) amplitude limit, output one base reference signal is to the electrode input end of described PID regulating circuit (4) again for this signal;
Current sampling signal from described LED output circuit (6), after amplifying, described differential amplifier circuit (7) is input to the negative input of described PID regulating circuit (4), the output pin output one of described PID regulating circuit (4) is controlled feedback signal to described PM control circuit (5), after the PM chip was regulated, the PM signal of the required pulsewidth of output was to the grid of power tube Q1.
2. LED colour temperature adjuster according to claim 1, it is characterized in that, described input voltage sample circuit (1) comprises resistance R 11, voltage-stabiliser tube DW1 and resistance R 12, one end of described resistance R 11 is connected with the pin 2 of described rectifier bridge BR1, the other end of described resistance R 11 is connected with the negative pole of described voltage-stabiliser tube DW1, the positive pole of described voltage-stabiliser tube DW1 connects an end of described resistance R 12, the other end ground connection of described resistance R 12, when the voltage that is added in voltage-stabiliser tube DW1 two ends was following lower than the voltage stabilizing value, the described base reference signal of output was close to zero.
3. LED colour temperature adjuster according to claim 1, it is characterized in that, described amplitude limiter circuit (3) comprises resistance R 17 and voltage-stabiliser tube DW2, one end of described resistance R 17 connects the output of described in-phase proportion amplifying circuit ⑵, the other end of described resistance R 17 connects respectively the negative pole of described voltage-stabiliser tube DW2 and an input of described PID regulating circuit (4), the plus earth of described voltage-stabiliser tube DW2, after the magnitude of voltage of voltage higher than certain setting that is added in described voltage-stabiliser tube DW2 two ends, the LED lamp of final stage is pressed the constant current operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100284456A CN103108461A (en) | 2013-01-24 | 2013-01-24 | Light-emitting diode (LED) color temperature adjusting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100284456A CN103108461A (en) | 2013-01-24 | 2013-01-24 | Light-emitting diode (LED) color temperature adjusting device |
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| CN103108461A true CN103108461A (en) | 2013-05-15 |
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| CN2013100284456A Pending CN103108461A (en) | 2013-01-24 | 2013-01-24 | Light-emitting diode (LED) color temperature adjusting device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730925A (en) * | 2015-03-15 | 2015-06-24 | 华南理工大学 | Input amplitude limiting PI control method |
| CN114019265A (en) * | 2021-09-23 | 2022-02-08 | 安徽康佳电子有限公司 | PM module screen line grafting detection circuitry |
| CN114237063A (en) * | 2021-12-16 | 2022-03-25 | 深圳绿米联创科技有限公司 | Scene control method, device and system, electronic equipment and medium |
| WO2023226955A1 (en) * | 2022-05-25 | 2023-11-30 | 嘉兴山蒲照明电器有限公司 | Emergency lighting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201119054Y (en) * | 2007-08-17 | 2008-09-17 | 东莞市邦臣光电有限公司 | LED road lamp driving power supply |
| CN101820711A (en) * | 2010-05-21 | 2010-09-01 | 杭州中信网络自动化有限公司 | Light-dimmer circuit of LED street lamp |
-
2013
- 2013-01-24 CN CN2013100284456A patent/CN103108461A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201119054Y (en) * | 2007-08-17 | 2008-09-17 | 东莞市邦臣光电有限公司 | LED road lamp driving power supply |
| CN101820711A (en) * | 2010-05-21 | 2010-09-01 | 杭州中信网络自动化有限公司 | Light-dimmer circuit of LED street lamp |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730925A (en) * | 2015-03-15 | 2015-06-24 | 华南理工大学 | Input amplitude limiting PI control method |
| CN114019265A (en) * | 2021-09-23 | 2022-02-08 | 安徽康佳电子有限公司 | PM module screen line grafting detection circuitry |
| CN114019265B (en) * | 2021-09-23 | 2024-05-10 | 安徽康佳电子有限公司 | PM module screen wire plug-in detection circuit |
| CN114237063A (en) * | 2021-12-16 | 2022-03-25 | 深圳绿米联创科技有限公司 | Scene control method, device and system, electronic equipment and medium |
| WO2023226955A1 (en) * | 2022-05-25 | 2023-11-30 | 嘉兴山蒲照明电器有限公司 | Emergency lighting device |
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Application publication date: 20130515 |