CN103582211B - A kind of LED night lamp of no electrolytic capacitor - Google Patents
A kind of LED night lamp of no electrolytic capacitor Download PDFInfo
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- CN103582211B CN103582211B CN201210264687.0A CN201210264687A CN103582211B CN 103582211 B CN103582211 B CN 103582211B CN 201210264687 A CN201210264687 A CN 201210264687A CN 103582211 B CN103582211 B CN 103582211B
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Abstract
A LED night lamp for no electrolytic capacitor, adopt the circuit design of no electrolytic capacitor element, its circuit is made up of single phase bridge type rectifier circu, unidirectional thyristor control circuit and relaxation oscillator formula circuits for triggering etc.The LED night lamp of no electrolytic capacitor, solves because electrochemical capacitor affects problem service life of LED night lamp, the service life of favourable prolongation LED night lamp.
Description
Technical field
The present invention relates to a kind of LED night lamp of no electrolytic capacitor.
Background technology
Along with the popularization and application of LED illumination lamp, LED night lamp is little with its power, the advantage that brightness is high, the dark fine taste by users.LED night lamp just on market, be all more or less in its drive circuit, be applied to electrolytic capacity element.Because the service life of electrolytic capacity element is very short, general only at 3000 hours.Like this, just greatly have impact on the durability characteristics of LED night lamp.
Summary of the invention
The LED night lamp of a kind of no electrolytic capacitor of the present invention, select no electrolytic capacitor element circuitry to design, its circuit structure is made up of single-phase rectification bridge, inductor L, filter circuit, relaxation oscillator formula circuits for triggering, unidirectional thyristor SCR control circuit and 6 light-emitting diodes.
A LED night lamp for no electrolytic capacitor, its relaxation oscillator formula circuits for triggering, are made up of R3, R4 and unijunction transistor B.Resistance R4 on the emitter of unijunction transistor B, the size of its value decides tension and relaxation and really swings the cycle of oscillation that device formula circuits for triggering send out, and also decides opening large or opening minor issue of unidirectional thyristor SCR electrical degree.R4 is an adjustable resistance, and when its value is little value, the conduction angle of single-phase thyristor SCR leaves greatly; On the contrary, when the value of R4 is in when being worth greatly, the conduction angle of unidirectional thyristor SCR leaves little.Adjust the value of R4, make the conduction angle aperture of unidirectional thyristor SCR just meet operating voltage and the electric current of 6 light-emitting diodes.
Accompanying drawing explanation
Accompanying drawing is a kind of circuit theory diagrams of LED night lamp of no electrolytic capacitor.
Embodiment
As shown in drawings, D*4 is single phase bridge type rectifier circu, and it becomes the Rectified alternating current of about 200V alternating current 220V, then supplies the working power of 6 light-emitting diode C*6 of relaxation oscillator formula circuits for triggering and unidirectional thyristor SCR control.
As shown in drawings, relaxation oscillator formula circuits for triggering are made up of unijunction transistor B, resistance R3, R4 and electric capacity C1, and resistance R4 is adjustable resistance, change the value of R4, just can change the cycle of oscillation of relaxation oscillator formula, thus change the aperture of the electrical degree of thyristor SCR.Namely, when R4 turns value down, relaxation oscillator formula trigger circuit triggers unidirectional thyristor SCR, performs fighting its conduction angle aperture; When R4 tunes up, relaxation oscillator formula trigger circuit triggers thyristor SCR, reduces its conduction angle aperture.Like this, by changing the value of R4, the brightness of 6 LED lamp bead can just be controlled.Regulate the value of R4, allow 6 light-emitting diodes just be operated in nominal value range.
As shown in drawings, resistance R1, R6 are current-limiting resistances, R2 and R5 is the biasing resistor of unijunction transistor B, and L is inductor filter circuit, and V is piezo-resistance, plays overvoltage protection effect in circuit.
Claims (1)
1. a LED night lamp for no electrolytic capacitor, its circuit is made up of single-phase bridge rectifier circuit, unidirectional thyristor circuit, relaxation oscillating circuit and LED; The input of described unidirectional bridge rectifier connects electric main, and an output of described single phase bridge type rectifier circu connects the anode of unidirectional thyristor SCR by inductance, the negative electrode of unidirectional thyristor SCR passes through the anode of resistance connecting luminous diode LED; Described relaxation oscillating circuit is made up of resistance R2, resistance R3, adjustable resistance R4, electric capacity C1 and unijunction transistor B, one end of resistance R2 connects one end of unijunction transistor B, the other end of resistance R2 connects an output of single-phase rectifier bridge circuit by resistance R1, the other end of unijunction transistor B connects the control pole of unidirectional thyristor SCR, and negative electrode and the power cathode of electric capacity C1 connecting luminous diode LED are passed through in the control pole of unijunction transistor B; One end of adjustable resistance R4 is connected the rear other end by resistance R3 contact resistance R2 with sliding end, the other end of adjustable resistance R4 connects the control pole of unijunction transistor B, and the other end of unijunction transistor B also connects another output of single phase bridge type rectifier circu by resistance R5; The resistance of adjustable resistance R4 determines that the frequency of oscillation of relaxation oscillating circuit and the conduction angle of unidirectional thyristor SCR are opened large or open little, and when the resistance of R4 is little value, the conduction angle of unidirectional thyristor SCR leaves greatly; When the value of R4 is in when being worth greatly, the conduction angle of unidirectional thyristor SCR leaves little; The value of adjustment R4, makes the conduction angle aperture of unidirectional thyristor SCR just meet operating current and the voltage of 6 LEDs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210264687.0A CN103582211B (en) | 2012-07-27 | 2012-07-27 | A kind of LED night lamp of no electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210264687.0A CN103582211B (en) | 2012-07-27 | 2012-07-27 | A kind of LED night lamp of no electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103582211A CN103582211A (en) | 2014-02-12 |
| CN103582211B true CN103582211B (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210264687.0A Active CN103582211B (en) | 2012-07-27 | 2012-07-27 | A kind of LED night lamp of no electrolytic capacitor |
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| CN (1) | CN103582211B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106571792A (en) * | 2016-11-04 | 2017-04-19 | 广西大学 | Animal husbandry high-voltage electronic fence circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69719076T2 (en) * | 1997-01-31 | 2003-07-17 | Osram Sylvania Inc | ELECTRONIC BALLAST WITH "VALLEY-FILL" PERFORMANCE FACTOR CORRECTION |
| CN101887278A (en) * | 2010-04-28 | 2010-11-17 | 周玉林 | Multipurpose thermostat controller |
| CN201773463U (en) * | 2010-09-17 | 2011-03-23 | 王雪峰 | Household disconnection theft-proof alarm |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1584370A (en) * | 1978-05-30 | 1981-02-11 | Accumulateurs Fixes | Battery charger and indicator circuit |
| CN2114218U (en) * | 1992-01-18 | 1992-08-26 | 张毓荪 | Electronic timing universal switch |
| CN2163489Y (en) * | 1993-07-15 | 1994-04-27 | 宗涛 | Telephone light self-control device |
| US5883549A (en) * | 1997-06-20 | 1999-03-16 | Hughes Electronics Corporation | Bipolar junction transistor (BJT)--resonant tunneling diode (RTD) oscillator circuit and method |
| CN201781311U (en) * | 2010-07-16 | 2011-03-30 | 陈如柏 | Simple portable storage battery charger for direct current panel |
| CN201902851U (en) * | 2010-09-30 | 2011-07-20 | 东莞市福光高科技节能有限公司 | LED (light-emitting diode) fluorescent lamp |
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2012
- 2012-07-27 CN CN201210264687.0A patent/CN103582211B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69719076T2 (en) * | 1997-01-31 | 2003-07-17 | Osram Sylvania Inc | ELECTRONIC BALLAST WITH "VALLEY-FILL" PERFORMANCE FACTOR CORRECTION |
| CN101887278A (en) * | 2010-04-28 | 2010-11-17 | 周玉林 | Multipurpose thermostat controller |
| CN201773463U (en) * | 2010-09-17 | 2011-03-23 | 王雪峰 | Household disconnection theft-proof alarm |
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| Publication number | Publication date |
|---|---|
| CN103582211A (en) | 2014-02-12 |
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Effective date of registration: 20201231 Address after: 224003 No.66, Xinyang Road, Tinghu District, Yancheng City, Jiangsu Province (18) Patentee after: JIANGSU MENSCH AUTO PARTS Co.,Ltd. Address before: 535500 that in Shangsi County of the Guangxi Zhuang Autonomous Region hydropower plant Patentee before: Huang Huanzhu |