CN102665313A - LED (light-emitting diode) energy-saving voltage step-down circuit - Google Patents
LED (light-emitting diode) energy-saving voltage step-down circuit Download PDFInfo
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- CN102665313A CN102665313A CN 201210158153 CN201210158153A CN102665313A CN 102665313 A CN102665313 A CN 102665313A CN 201210158153 CN201210158153 CN 201210158153 CN 201210158153 A CN201210158153 A CN 201210158153A CN 102665313 A CN102665313 A CN 102665313A
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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 invention discloses a LED (light-emitting diode) energy-saving voltage step-down circuit which sequentially comprises a power source, a transformer, a voltage comparator, a PWM (pulse-width modulation) module, an LED lamp and an MCU (microprogrammed control unit) which are connected with each other, wherein an output end of a power source circuit is connected with an input end of the transformer; an output end of the transformer is connected with an input end of the voltage comparator; an output end of the voltage comparator is connected with an input end of the PWM module; an output end of the PWM module is connected with an input end of the LED lamp; an output end of the LED lamp is connected with an input end of the MCU; and an input end of the MCU is connected with the power source. A thermistor R2 is connected between the input end of the MCU and the ground output end. The resistance value of the thermistor R2 varies along with the temperature; the voltage of both ends of the thermistor R2 is acquired to obtain an electric signal of reaction temperature variation; after the electric signal is input into the MCU, the voltage is input to the negative pole end of the LED, so that the voltage difference between both ends of the LED is lowered and the radiated heat of the LED is reduced; and thus, the LED energy-saving lamp can achieve thermal balance at low temperature, thereby saving the electric energy and prolonging the service life.
Description
Technical field
The present invention relates to a kind of home lighting equipment, particularly relate to the energy-conservation reduction voltage circuit of LED.
Background technology
LED is a semiconductor light-emitting-diode, and the LED electricity-saving lamp is with high brightness white light-emitting diode light emitting source, and light efficiency is high, little power consumption, long, easy to control, non-maintaining, safety and environmental protection of life-span; Be solid cold light source of new generation, photochromic soft, gorgeous, rich and varied, low-loss, low energy consumption, environmental protection is suitable for family, the market, bank, hospital, the hotel, he throws light on the restaurant various public places for a long time.Not having the direct current of sudden strain of a muscle, eyes are played a very good protection, is desk lamp, the optimal selection of torch.
The LED electricity-saving lamp is the lighting source of new generation behind compact fluorescent lamp (being common energy-saving lamp).Compare common energy-saving lamp, the environmental protection of LED electricity-saving lamp is not mercurous, recyclablely utilize again, under the power, high light efficiency, the long-life, promptly open promptly bright, anti-frequent switch, light decay is little, rich color, tunable optical, change is abundant.A large amount of common energy-saving lamps that use can cause mercury pollution, contaminated soil water source, thereby indirect contaminated food products, and environmental hazard can not be despised.
That LED has is energy-efficient, extra long life, health, environmental protection, vision protection, optical efficiency is high, coefficient of safety is high, market potential is big.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, LED is provided energy-conservation reduction voltage circuit, simple in structure, energy-conserving and environment-protective, safe and reliable, cost is low, long service life.
In order to achieve the above object, the technical scheme that the present invention adopts is: the energy-conservation reduction voltage circuit of LED, and the energy-conservation reduction voltage circuit of described LED comprises interconnective power supply, transformer, voltage comparator, PWM module, LED lamp and MCU microcontroller successively; The output of power circuit connects the input of transformer; The output of transformer connects the input of voltage comparator; The output of voltage comparator connects the PWM module input; PWM module output connects LED lamp input, and LED lamp output connects the output of MCU microprocessor, the input termination power of MCU microprocessor.Be connected a thermistor R2 between the input of described MCU microprocessor and the ground output.
Further, between described thermistor R2 and the MCU microprocessor ground output resistance R 3 is set also.
Compared with prior art; The invention has the beneficial effects as follows: temperature sensor thermistor R2 obtains the signal of telecommunication that reaction temperature changes with the temperature change in resistance through the voltage of gathering thermistor R2 two ends, behind the signal of telecommunication input MCU microcontroller; Negative pole end through modulation output voltage to LED light-emitting diode; LED light-emitting diode voltage difference reduces, and the heating of LED light-emitting diode reduces, and makes the LED electricity-saving lamp reach heat balance at a lower temperature; Practice thrift electric energy, prolonged useful life simultaneously.
Description of drawings
Fig. 1 is a circuit structure schematic diagram of the present invention.
Embodiment
Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that technical characterictic of the present invention and advantage are carried out more deep annotation.
Circuit structure schematic diagram of the present invention is as shown in Figure 1, the energy-conservation reduction voltage circuit of a kind of LED, and the energy-conservation reduction voltage circuit of described LED comprises interconnective power supply, transformer, voltage comparator, PWM module, LED lamp and MCU microcontroller successively; The output of power circuit connects the input of transformer; The output of transformer connects the input of voltage comparator; The output of voltage comparator connects the PWM module input; PWM module output connects LED lamp input, and LED lamp output connects the output of MCU microprocessor, the input termination power of MCU microprocessor.Further, be connected a thermistor R2 between the input of described MCU microprocessor and the ground output.
Further, between described thermistor R2 and the MCU microprocessor ground output resistance R 3 is set also.
Operation principle of the present invention is following: through the transformer transformation, and through outputing to LED lamp group after through the modulation of PWM module after the over-voltage comparator, the output of LED lamp group connects the MCU microprocessor after the supply voltage input.Temperature sensor thermistor R2 obtains the signal of telecommunication that reaction temperature changes with the temperature change in resistance through the voltage of gathering thermistor R2 two ends, behind the signal of telecommunication input MCU microcontroller; Negative pole end through modulation output voltage to LED light-emitting diode; LED light-emitting diode voltage difference reduces, and the heating of LED light-emitting diode reduces, and makes the LED electricity-saving lamp reach heat balance at a lower temperature; Practice thrift electric energy, prolonged useful life simultaneously.
The content of mentioning in the foregoing description is not to be to qualification of the present invention, and under the prerequisite that does not break away from inventive concept of the present invention, any conspicuous replacement is all within protection scope of the present invention.
Claims (2)
1.LED energy-conservation reduction voltage circuit is characterized in that: the energy-conservation reduction voltage circuit of described LED comprises interconnective power supply, transformer, voltage comparator, PWM module, LED lamp and MCU microcontroller successively; The output of power circuit connects the input of transformer; The output of transformer connects the input of voltage comparator; The output of voltage comparator connects the PWM module input; PWM module output connects LED lamp input, and LED lamp output connects the output of MCU microprocessor, the input termination power of MCU microprocessor; Be connected a thermistor R2 between the input of described MCU microprocessor and the ground output.
2. the energy-conservation reduction voltage circuit of LED according to claim 1 is characterized in that: between described thermistor R2 and the MCU microprocessor ground output resistance R 3 is set also.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210158153 CN102665313A (en) | 2012-05-21 | 2012-05-21 | LED (light-emitting diode) energy-saving voltage step-down circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210158153 CN102665313A (en) | 2012-05-21 | 2012-05-21 | LED (light-emitting diode) energy-saving voltage step-down circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102665313A true CN102665313A (en) | 2012-09-12 |
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ID=46774695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210158153 Pending CN102665313A (en) | 2012-05-21 | 2012-05-21 | LED (light-emitting diode) energy-saving voltage step-down circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102665313A (en) |
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2012
- 2012-05-21 CN CN 201210158153 patent/CN102665313A/en active Pending
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120912 |