CN203590564U - Circuit for raising sectional AC drive LED utilization rate - Google Patents
Circuit for raising sectional AC drive LED utilization rate Download PDFInfo
- Publication number
- CN203590564U CN203590564U CN201320768328.9U CN201320768328U CN203590564U CN 203590564 U CN203590564 U CN 203590564U CN 201320768328 U CN201320768328 U CN 201320768328U CN 203590564 U CN203590564 U CN 203590564U
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- circuit
- led light
- light source
- limit value
- filter circuit
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Abstract
A circuit for raising sectional AC drive LED utilization rate comprises an input end, a rectifying circuit, a limit-value filter circuit and a control circuit. Several sections of LED light sources are connected on the control circuit. The control circuit comprises a control chip. The limit-value filter circuit is connected with a first section of LED light source. The utility model has beneficial effects as follows: the circuit has a simple and reasonable structure and is convenient to use; as the limit-value filter circuit is added into the sectional AC drive LED circuit, input voltage waveform is changed from a normal half-wave to a waveform of the minimum voltage value being just greater than Vf voltage value of the first section of LED light source, and input voltage is always greater than Vf of the first section of LED light source. Thus, the first section of LED light source is shining during the whole working period, power factor of the sectional AC drive LEDs is raised; and utilization rate of the sectional AC drive LEDs is enhanced. The circuit has good using effects and is good for popularization.
Description
Technical field
The utility model relates to a kind of circuit, especially a kind of circuit that improves segmented interchange driving LED utilance.
Background technology
At present, it is a kind of LED light source to be divided into several sections of circuit of lighting successively that segmented exchanges driving LED circuit, it detects the voltage waveform of input by control chip, and the Vf voltage that contrasts every section of LED light source obtains segmentation magnitude of voltage, when input voltage reaches segmentation magnitude of voltage, the LED light source of correspondent section is lighted, segmented exchanges driving LED circuit raising power factor (PF) and has saved filter circuit, sine wave is followed in input completely, therefore the Vf magnitude of voltage of input voltage from 0V to first paragraph LED light source during this period of time in all LED light sources do not work, all LED light sources in contrary process in this period do not work yet, therefore, LED is during this period of time not used.
Utility model content
The utility model will solve the problem that above-mentioned prior art exists, a kind of circuit that segmented exchanges driving LED utilance that improves is provided, simple and reasonable, easy to use, the first paragraph LED light source that can make segmented exchange driving LED circuit is lighted within the whole work period, improve the utilance of segmented interchange driving LED circuit, met people's demand.
The utility model solves the technical scheme that its technical problem adopts: this raising segmented exchanges the circuit of driving LED utilance, comprise input, rectification circuit, the filter circuit of limit value, control circuit, input is connected with rectification circuit, rectification circuit is connected with the filter circuit of limit value, the filter circuit of limit value is connected with control circuit, on control circuit, be connected with some sections of LED light sources, rectification circuit comprises rectifier bridge, control circuit comprises the control chip for input voltage waveform is synchronizeed with input current waveform, the filter circuit of limit value comprises high voltage thin film electric capacity, the filter circuit of limit value is connected with the LED light source of first paragraph.After arranging like this, simple and reasonable, easy to use, during use, control chip detects the voltage waveform of input, and the Vf voltage that contrasts every section of LED light source obtains segmentation magnitude of voltage, when input voltage reaches segmentation magnitude of voltage, the LED light source of correspondent section is lighted, because exchanging driving LED circuit, segmented follows sine wave completely, therefore interior all LED light sources during this period of time of the Vf magnitude of voltage of input voltage from 0V to first paragraph LED light source do not work, all LED light sources in contrary process in this period do not work yet, therefore, after having added the filter circuit of limit value, input voltage waveform has become the waveform of voltage minimum just greater than the Vf magnitude of voltage of first paragraph LED light source by normal half-wave, make input voltage be greater than all the time the Vf of first paragraph LED light source, therefore, first paragraph LED light source is all lit within the whole work period, improved the power factor (PF) of segmented interchange driving LED, improved the utilance of segmented interchange driving LED, result of use is good.
On LED light source, be connected with lamp plate.After arranging like this, lamp plate is used for installing LED light source, easy to use.
Filter circuit, the control circuit of rectification circuit, limit value are all welded on lamp plate.After arranging like this, the filter circuit of rectification circuit, limit value, control circuit are all connected on lamp plate, have removed the use of outer casing of power supply from, have reduced the space that circuit takies at light fixture, and result of use is good.
The effect that the utility model is useful is: raising segmented of the present utility model exchanges the circuit of driving LED utilance, simple and reasonable, easy to use, in segmented, exchange the filter circuit that adds limit value in driving LED circuit, make input voltage waveform become the waveform of voltage minimum just greater than the Vf magnitude of voltage of first paragraph LED light source by normal half-wave, make input voltage be greater than all the time the Vf of first paragraph LED light source, therefore, first paragraph LED light source is all lit within the whole work period, improved the power factor (PF) of segmented interchange driving LED, improved the utilance of segmented interchange driving LED, result of use is good, be beneficial to popularization.
Accompanying drawing explanation
Fig. 1 is the block diagram of the utility model embodiment.
Description of reference numerals: input 1, rectification circuit 2, the filter circuit 3 of limit value, control circuit 4, LED light source 5, rectifier bridge 6, control chip 7, high voltage thin film electric capacity 8, lamp plate 9.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to accompanying drawing: the raising segmented in the present embodiment exchanges the circuit of driving LED utilance, comprise input 1, rectification circuit 2, the filter circuit 3 of limit value, control circuit 4, input 1 is connected with rectification circuit 2, rectification circuit 2 is connected with the filter circuit 3 of limit value, the filter circuit 3 of limit value is connected with control circuit 4, on control circuit 4, be connected with some sections of LED light sources 5, rectification circuit 2 comprises rectifier bridge 6, control circuit 4 comprises the control chip 7 for input voltage waveform is synchronizeed with input current waveform, the filter circuit 3 of limit value comprises high voltage thin film electric capacity 8, the filter circuit 3 of limit value is connected with the LED light source 5 of first paragraph.
On LED light source 5, be connected with lamp plate 9.
The capacitance settings of high voltage thin film electric capacity 8 is in rational scope, in order to meet the instructions for use of the filter circuit 3 of limit value.
During use, control chip 7 detects the voltage waveform of input, and the Vf voltage that contrasts every section of LED light source 5 obtains segmentation magnitude of voltage, when input voltage reaches segmentation magnitude of voltage, the LED light source of correspondent section 5 is lighted, because exchanging driving LED circuit, segmented follows sine wave completely, therefore interior all LED light sources 5 during this period of time of the Vf magnitude of voltage of input voltage from 0V to first paragraph LED light source 5 do not work, all LED light sources 5 in contrary process in this period do not work yet, therefore, added the rear input voltage waveform of filter circuit 3 of limit value to become the waveform of voltage minimum just greater than the Vf magnitude of voltage of first paragraph LED light source 5 by normal half-wave, make input voltage be greater than all the time the Vf of first paragraph LED light source 5, therefore, first paragraph LED light source 5 is all lit within the whole work period.
The feature of the present embodiment is: in segmented, exchange the filter circuit 3 that adds limit value in driving LED circuit, make input voltage waveform become the waveform of voltage minimum just greater than the Vf magnitude of voltage of first paragraph LED light source 5 by normal half-wave, make input voltage be greater than all the time the Vf of first paragraph LED light source 5, therefore, first paragraph LED light source 5 is all lit within the whole work period, improved the power factor (PF) of segmented interchange driving LED, improved the utilance of segmented interchange driving LED, result of use is good, is beneficial to popularization.
Although the utility model illustrates and describes by reference to preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation in form and details.
Claims (3)
1. one kind is improved the circuit that segmented exchanges driving LED utilance, it is characterized in that: comprise input (1), rectification circuit (2), the filter circuit of limit value (3), control circuit (4), described input (1) is connected with rectification circuit (2), described rectification circuit (2) is connected with the filter circuit (3) of limit value, the filter circuit of described limit value (3) is connected with control circuit (4), on described control circuit (4), be connected with some string LED light sources (5), described rectification circuit (2) comprises rectifier bridge (6), described control circuit (4) comprises the control chip (7) for input voltage waveform is synchronizeed with input current waveform, the filter circuit of described limit value (3) comprises high voltage thin film electric capacity (8), the filter circuit of described limit value (3) is connected with the LED light source (5) of first paragraph.
2. raising segmented according to claim 1 exchanges the circuit of driving LED utilance, it is characterized in that: on described LED light source (5), be connected with lamp plate (9).
3. raising segmented according to claim 2 exchanges the circuit of driving LED utilance, it is characterized in that: filter circuit (3), the control circuit (4) of described rectification circuit (2), limit value are all welded on lamp plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320768328.9U CN203590564U (en) | 2013-11-29 | 2013-11-29 | Circuit for raising sectional AC drive LED utilization rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320768328.9U CN203590564U (en) | 2013-11-29 | 2013-11-29 | Circuit for raising sectional AC drive LED utilization rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203590564U true CN203590564U (en) | 2014-05-07 |
Family
ID=50588398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320768328.9U Expired - Fee Related CN203590564U (en) | 2013-11-29 | 2013-11-29 | Circuit for raising sectional AC drive LED utilization rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203590564U (en) |
-
2013
- 2013-11-29 CN CN201320768328.9U patent/CN203590564U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20141129 |
|
| EXPY | Termination of patent right or utility model |