CN201207741Y - Driving circuit for small power LED lighting bulb - Google Patents
Driving circuit for small power LED lighting bulb Download PDFInfo
- Publication number
- CN201207741Y CN201207741Y CNU2008200786226U CN200820078622U CN201207741Y CN 201207741 Y CN201207741 Y CN 201207741Y CN U2008200786226 U CNU2008200786226 U CN U2008200786226U CN 200820078622 U CN200820078622 U CN 200820078622U CN 201207741 Y CN201207741 Y CN 201207741Y
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- circuit
- drive circuit
- led illumination
- voltage
- illumination bulb
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- 238000005286 illumination Methods 0.000 claims description 14
- 238000009966 trimming Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The utility model discloses a low power LED lighting bulb drive circuit. The drive circuit comprises an external power supply which is connected with a bridge rectifier through a step-down current-limiting circuit, and both ends of the bridge rectifier are connected with filtering and voltage stabilizing circuits in parallel. The voltage is applied to the LED group by voltage fine-tuning circuit corresponding to different power output.
Description
Technical field
The utility model relates to a kind of bulb driving circuit, especially adopts 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 purpose of this utility model is at existing light-emitting diode and other lighting bulb drive circuit above shortcomings, proposes a kind of new LED illumination bulb drive circuit.
The technical solution of the utility model 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.
The utility model has the advantages that 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, 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 utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the LED illumination bulb drive circuit schematic diagram according to the utility model embodiment.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.
Embodiment of the present utility model only is used to make things convenient for those skilled in the art to understand the utility model, and should not be construed as the restriction to the utility model protection range.Under the situation that does not break away from the utility model purport, distortion that those skilled in the art did and replacement also should be included in the protection range of the present utility model.
Claims (5)
1, a kind of 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 is the RC circuit.
3. LED illumination bulb drive circuit according to claim 1 is characterized in that: filter regulator circuit is the RC circuit.
4. LED illumination bulb drive circuit according to claim 1 is characterized in that: voltage trimming circuit is a variable resistance circuit.
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 |
|---|---|---|---|
| CNU2008200786226U CN201207741Y (en) | 2008-01-18 | 2008-01-18 | Driving circuit for small power LED lighting bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200786226U CN201207741Y (en) | 2008-01-18 | 2008-01-18 | Driving circuit for small power LED lighting bulb |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201207741Y true CN201207741Y (en) | 2009-03-11 |
Family
ID=40466794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200786226U Expired - Fee Related CN201207741Y (en) | 2008-01-18 | 2008-01-18 | Driving circuit for small power LED lighting bulb |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201207741Y (en) |
-
2008
- 2008-01-18 CN CNU2008200786226U patent/CN201207741Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIN HAIYUE Free format text: FORMER OWNER: LI GUANGNAN Effective date: 20090605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090605 Address after: Beijing Zizhuyuan Road 128 No. 1 No. 152, zip code: 100097 Patentee after: Jin Haiyue Address before: Beijing Zizhuyuan Road 128 No. 1 No. 152, zip code: 100097 Patentee before: Li Guangnan |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090311 Termination date: 20130118 |