CN203378104U - Light modulation circuit - Google Patents
Light modulation circuit Download PDFInfo
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- CN203378104U CN203378104U CN201320433190.7U CN201320433190U CN203378104U CN 203378104 U CN203378104 U CN 203378104U CN 201320433190 U CN201320433190 U CN 201320433190U CN 203378104 U CN203378104 U CN 203378104U
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- amplifier
- phase input
- input end
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- voltage
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- 239000003381 stabilizer Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
The utility model discloses a light modulation circuit comprising a first amplifier. An in-phase input end of the first amplifier is connected with a reference circuit. The in-phase input end of the first amplifier and an anti-phase input end of the first amplifier are respectively connected with an output end of the first amplifier. The output end of the first amplifier is also connected with an in-phase input end of a second amplifier. An anti-phase input end of the second amplifier is connected with an output end of the second amplifier. When the in-phase input end of the first amplifier is provided with an external light modulation voltage in a loaded manner, a potential of the light modulation end can be changed, and therefore the light modulation object can be realized. The light modulation circuit has advantages of simple circuit structure and low production costs.
Description
Technical field
The utility model relates to LED drive circuit, relates in particular to a kind of light adjusting circuit.
Background technology
LED, because of characteristics such as low in energy consumption, life-span are long, is applied, especially at lighting field in more and more wide field.Because the luminous efficiency of LED lighting is very high, all the period of time maintains waste and the light pollution that highlight illumination can cause electric power, and can cause a large amount of heats because of LED for a long time in full load condition, thereby reduces the useful life of LED.In the prior art, for the technical way of regulating the brightness of illumination employing is to set up light-adjusting module and IC scheme, but do like this rising that has caused cost, and the circuit complexity, be unfavorable for the popularization of LED lighting.
The utility model content
The utility model aims to provide the light adjusting circuit that a kind of circuit is simple, cost is low.
For addressing the above problem, the utility model by the following technical solutions:
A kind of light adjusting circuit comprises: the first amplifier, and the in-phase input end of this first amplifier connects reference circuit, and the inverting input of the in-phase input end of this first amplifier, this first amplifier is connected with the output of this first amplifier respectively; The output of this first amplifier also is connected in the in-phase input end of the second amplifier; The inverting input of described the second amplifier is connected with the output of described the second amplifier.
Adopt above technical scheme, the beneficial effect of generation is:
When the first amplifier is started working, reference circuit provides a reference voltage for its in-phase input end, make its output end voltage rise to rapidly supply power voltage, in-phase input end due to this first amplifier, inverting input is connected with output respectively, form a voltage follower circuit, therefore above-mentioned three ends are in the situation that enter all in same current potential without external voltage, and by output by voltage-drop loading the in-phase input end to the second amplifier, because the second amplifier is another voltage follower circuit, according to the amplifier principle, the inverting input of the second amplifier rises to rapidly the current potential of its in-phase input end, and as the output pin of light modulation end by voltage-drop loading to luminescent device, known, when the in-phase input end of the first amplifier is loaded with external dimmer voltage, the current potential of light modulation end also changes thereupon, thereby realizes the purpose of light modulation.Circuit structure is simple, and production cost is low.
The accompanying drawing explanation
Fig. 1 is the circuit block diagram of light adjusting circuit of the present utility model;
Fig. 2 is the circuit connection diagram of the utility model in a preferred embodiment.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of light adjusting circuit comprises: the first amplifier, and the in-phase input end of this first amplifier connects reference circuit, and the inverting input of the in-phase input end of this first amplifier, this first amplifier is connected with the output of this first amplifier respectively; The output of this first amplifier also is connected in the in-phase input end of the second amplifier; The inverting input of the second amplifier is connected with the output of the second amplifier.
Preferably, the output of the first amplifier is connected with a voltage-stabiliser tube, the negative electrode of this voltage-stabiliser tube of output termination of this first amplifier, and the plus earth of this voltage-stabiliser tube, the voltage that makes to be loaded into the second amplifier is more stable.
Preferably, the output of the first amplifier also is connected with ground capacity, when external dimmer voltage is digital signal, after this ground capacity filtering, can be exchanged into module by signal, and then the voltage of light modulation end is changed thereupon.
In order to make, the utility model is more clear to be understood, below enumerates the concrete connection layout of an embodiment:
As shown in Figure 2, reference circuit, comprise thyristor VS, resistance R 5 and resistance R 6, and the negative electrode of thyristor VS meets power supply VCC by resistance R 5, plus earth, gate pole connects the pin 3 of the first amplifier A1 by resistance R 6.
The pin 8 of the first amplifier A1 meets power supply VCC, pin 4 ground connection, and pin 2, by resistance R 4 ground connection, is connected with pin 1 by resistance R 3; The pin 1 of the first amplifier A1 is gone back the end of contact resistance R2, and the other end of this resistance R 2 is connected with described pin 3 by resistance R 1, and is connected the plus earth of this voltage-stabiliser tube VD with the negative electrode of voltage-stabiliser tube VD.
The negative electrode of voltage-stabiliser tube VD also is connected by the pin 5 of resistance R 7 and the second amplifier A2, its pin 7 is connected with pin 6 by diode D2, pin 7 connects the anode of diode D2, pin 6 connects the negative electrode of diode D2, pin 6 is ground connection after crosstalk resistance R9, R10 successively, wherein, the output pin that the tie point of resistance R 9 and resistance R 10 is the light modulation end.
The negative electrode of voltage-stabiliser tube VD also connects the anode of diode D1 by resistance R 8, after the negative electrode crosstalk resistance R11 of diode D1, connect outside dimmer voltage, and the anode of diode D1 also is connected with a ground capacity C1.
Above-described the utility model execution mode, do not form the restriction to the utility model protection range.Any modification of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in claim protection range of the present utility model.
Claims (3)
1. a light adjusting circuit, it is characterized in that, comprise: the first amplifier, the in-phase input end of this first amplifier connects reference circuit, and the inverting input of the in-phase input end of this first amplifier, this first amplifier is connected with the output of this first amplifier respectively; The output of this first amplifier also is connected in the in-phase input end of the second amplifier; The inverting input of described the second amplifier is connected with the output of described the second amplifier.
2. light adjusting circuit according to claim 1, is characterized in that, the output of described the first amplifier is connected with a voltage-stabiliser tube, the negative electrode of this voltage-stabiliser tube of output termination of this first amplifier, the plus earth of this voltage-stabiliser tube.
3. light adjusting circuit according to claim 1, is characterized in that, the output of described the first amplifier also is connected with ground capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320433190.7U CN203378104U (en) | 2013-07-19 | 2013-07-19 | Light modulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320433190.7U CN203378104U (en) | 2013-07-19 | 2013-07-19 | Light modulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203378104U true CN203378104U (en) | 2014-01-01 |
Family
ID=49840604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320433190.7U Expired - Fee Related CN203378104U (en) | 2013-07-19 | 2013-07-19 | Light modulation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203378104U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105050280A (en) * | 2015-08-11 | 2015-11-11 | 苏州晶雷光电照明科技有限公司 | Drive circuit of light-emitting diode (LED) corridor lighting system |
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
-
2013
- 2013-07-19 CN CN201320433190.7U patent/CN203378104U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105050280A (en) * | 2015-08-11 | 2015-11-11 | 苏州晶雷光电照明科技有限公司 | Drive circuit of light-emitting diode (LED) corridor lighting system |
| CN105050280B (en) * | 2015-08-11 | 2018-11-30 | 苏州晶雷光电照明科技有限公司 | The driving circuit of LED corridor illuminating system |
| CN115734428A (en) * | 2022-12-28 | 2023-03-03 | 威海中远海运重工科技有限公司 | Constant-power stepless dimming control system |
| CN115734428B (en) * | 2022-12-28 | 2024-05-31 | 威海中远海运重工科技有限公司 | Constant-power electrodeless dimming control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20160719 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |