CN101217842A - A drive circuit with low power LED light bulb - Google Patents
A drive circuit with low power LED light bulb Download PDFInfo
- Publication number
- CN101217842A CN101217842A CNA2008100564456A CN200810056445A CN101217842A CN 101217842 A CN101217842 A CN 101217842A CN A2008100564456 A CNA2008100564456 A CN A2008100564456A CN 200810056445 A CN200810056445 A CN 200810056445A CN 101217842 A CN101217842 A CN 101217842A
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- drive circuit
- circuit
- voltage
- led illumination
- rectifier bridge
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Abstract
The invention discloses a small power LED lighting bulb driving circuit. The driving circuit comprises an external power supply which is connected with a rectifier bridge through a voltage-reducing and current-limiting circuit; furthermore, the two ends of the rectifier bridge are connected with a filter voltage stabilizing circuit in parallel; the voltage is acted on an LED group by the voltage fine adjustment circuits corresponding to different output powers.
Description
Technical field
The present invention relates to a kind of bulb driving circuit, especially adopt the bulb driving circuit of low power LED as cold light source.
Background technology
At present, the drive circuit of general LED illumination bulb is very simple, only electric main is applied to the two ends of light-emitting component, and protective resistance is gone in series connection in circuit at most.Like this, when mains-supplied voltage and frequency change, general bulb brightness is fluctuated, even can't work, and has not only shortened component life, the more important thing is the health that affects one's power of vision.And sort circuit is directly introduced alternating current, and the noise current in the alternating current has also been introduced in the light-emitting component, has increased the caloric value of light-emitting component, causes unnecessary energy consumption; In addition, the conventional approaching more pure direct current of electronic circuit rectification, the caloric value of easy more increase light-emitting component equally also causes the persistently overheating and power consumption of bulb; In addition, Gas lamp starts slow and optical flare, when closing lamp persistence long, can not satisfy the needs of human eye comfort level.
Summary of the invention
The objective of the invention is to propose a kind of new LED illumination bulb drive circuit at existing light-emitting diode and other lighting bulb drive circuit above shortcomings.
Technical scheme of the present invention is:
A kind of LED illumination bulb drive circuit, comprise external power supply, this external power supply is connected to rectifier bridge by the step-down current-limiting circuit, and the two ends at rectifier bridge are parallel with filter regulator circuit, voltage trimming circuit by corresponding different output power is applied to light-emitting diode group with voltage.
In the above-mentioned LED illumination bulb drive circuit, the step-down current-limiting circuit realizes by the RC loop.
In the above-mentioned LED illumination bulb drive circuit, filter regulator circuit is realized by the RC loop.
In the above-mentioned LED illumination bulb drive circuit, voltage trimming circuit is realized by resistance.
In the above-mentioned LED illumination bulb drive circuit, rectifier bridge is a single-phase bridge, and the rectifier diode of surplus more than 20 times is arranged for operating current.
Advantage of the present invention is, the improvement of circuit makes that the current waveform of input light-emitting component is stable, thereby the thermal losses of light-emitting component is little, and it is hot to be not easy to generate heat, and the bulb outer wall can keep permanent low-temperature condition.When opening and closing lamp simultaneously light source response rapidly, the drawback of flicker when thoroughly having avoided light source to open, twilight sunset time-delay when disconnecting has satisfied the needs of human eye comfort level.
Description of drawings
Fig. 1 is the LED illumination bulb drive circuit schematic diagram according to the embodiment of the invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the LED illumination bulb drive circuit schematic diagram according to the embodiment of the invention.Wherein, external power supply is generally the 220V civil power, is connected to rectifier bridge by the step-down current-limiting circuit, and is parallel with filter regulator circuit at the rectifier bridge two ends, and the voltage trimming circuit by corresponding different output power is applied to light-emitting diode group with voltage.Preferably, this step-down current-limiting circuit realizes that by the RC loop filter regulator circuit realizes by the RC loop that also voltage trimming circuit adopts resistance to realize.
In the real work, after inserting the 220V civil power, the step-down current-limiting circuit drops to light source required voltage value with the 220V alternating current, simultaneously with waveform shaping, and the filtering high order harmonic component.
Rectifier bridge is generally single-phase bridge, and is stable in order to guarantee circuit, adopts withstand voltage higher usually, and operating current has the rectifier diode of 20 times of left and right sides surpluses.
After the filter regulator circuit rectification, filter action in conjunction with the step-down current-limiting circuit, make that the current waveform that outputs to light-emitting component is stable, can both guarantee the light-emitting component operate as normal in the variation of the frequency that when normal power supply, allows, harmonic content and voltage magnitude, reduced the energy loss that noise waveform produces, effectively reduce the element heating amount, significantly improved luminous efficiency, and the electric current of reference waveform input has prolonged the useful life of light-emitting component.
When unlatching or deenergization, electric capacity in step-down current-limiting circuit and the filter regulator circuit and resistance form feedback loop, thereby make light-emitting component light rapidly and extinguish, by regulating feedback factor, can make the reaction time be reduced to millisecond (ms) magnitude, improve response speed greatly, satisfied the requirement of human eye comfort level.
The specific embodiment of the present invention only is used to make things convenient for those skilled in the art to understand the present invention, and should not be construed as limiting the scope of the invention.Under the situation that does not break away from purport of the present invention, distortion that those skilled in the art did and replacement also should be included in protection scope of the present invention
Claims (5)
1. LED illumination bulb drive circuit, comprise external power supply, it is characterized in that: this external power supply is connected to rectifier bridge by the step-down current-limiting circuit, and the two ends at rectifier bridge are parallel with filter regulator circuit, voltage trimming circuit by corresponding different output power is applied to light-emitting diode group with voltage.
2. LED illumination bulb drive circuit according to claim 1 is characterized in that: the step-down current-limiting circuit realizes by the RC loop.
3. LED illumination bulb drive circuit according to claim 1 is characterized in that: filter regulator circuit is realized by the RC loop.
4. LED illumination bulb drive circuit according to claim 1, it is characterized in that: voltage trimming circuit is realized by resistance.
5. LED illumination bulb drive circuit according to claim 1 is characterized in that: rectifier bridge is a single-phase bridge, and the rectifier diode of surplus more than 20 times is arranged for operating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100564456A CN101217842A (en) | 2008-01-18 | 2008-01-18 | A drive circuit with low power LED light bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100564456A CN101217842A (en) | 2008-01-18 | 2008-01-18 | A drive circuit with low power LED light bulb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101217842A true CN101217842A (en) | 2008-07-09 |
Family
ID=39624180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100564456A Pending CN101217842A (en) | 2008-01-18 | 2008-01-18 | A drive circuit with low power LED light bulb |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101217842A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103650644A (en) * | 2011-07-15 | 2014-03-19 | 西铁城控股株式会社 | LED illumination device |
| CN105917475A (en) * | 2014-01-28 | 2016-08-31 | 夏普株式会社 | Light-emitting diode driver and illumination device |
-
2008
- 2008-01-18 CN CNA2008100564456A patent/CN101217842A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103650644A (en) * | 2011-07-15 | 2014-03-19 | 西铁城控股株式会社 | LED illumination device |
| CN103650644B (en) * | 2011-07-15 | 2015-11-25 | 西铁城控股株式会社 | LED light device |
| CN105917475A (en) * | 2014-01-28 | 2016-08-31 | 夏普株式会社 | Light-emitting diode driver and illumination device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: JIN HAIYUE Free format text: FORMER OWNER: LI GUANGNAN Effective date: 20090522 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20090522 Address after: Beijing Zizhuyuan Road 128 No. 1 No. 152 post encoding: 100097 Applicant after: Jin Haiyue Address before: Beijing Zizhuyuan Road 128 No. 1 No. 152 post encoding: 100097 Applicant before: Li Guangnan |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080709 |