CN102300359A - Power supply device of light emitting diode (LED) lamp - Google Patents
Power supply device of light emitting diode (LED) lamp Download PDFInfo
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- CN102300359A CN102300359A CN2010102189467A CN201010218946A CN102300359A CN 102300359 A CN102300359 A CN 102300359A CN 2010102189467 A CN2010102189467 A CN 2010102189467A CN 201010218946 A CN201010218946 A CN 201010218946A CN 102300359 A CN102300359 A CN 102300359A
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- led lamp
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- lamp power
- feeding mechanism
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Abstract
The invention provides a power supply device of a light emitting diode (LED) lamp. In the power supply device, an input high-voltage alternating current signal is converted to a low-voltage alternating signal mainly by utilizing an isolation transformer, so as to generate a drive voltage to drive the LED lamp. The power supply device comprises a wave shape and frequency modulation module and a primary rectification filtering module, wherein, the wave shape and frequency modulation module is arranged at a primary side of the isolation transformer for modulating an input wave shape and one frequency f, wherein, f is more than or equal to 60Hz; and the primary rectification filtering module is arranged at a secondary side of the isolation transformer for converting the low-voltage alternating signal after passing through the isolation transformer into the drive voltage; the drive voltage is a low-voltage ripple signal; and the peak to peak value delta V of the low-voltage ripple signal is more than or equal to 1, thus a vision duration principle is utilized to modulate and drive the voltage wave shape and frequency of the LED, so that the power supply device of the LED lamp can maintain normal operation.
Description
Technical field
The present invention is relevant with the power supply unit field, particularly persists principle with the voltage waveform of modulation driving LED and frequency and make it still can keep the LED lamp power feeding mechanism of operate as normal about a kind of human eye vision that utilizes.
Background technology
(Light Emitting Diode LED) compared to general conventional light source, is to have advantages such as low-voltage, low power consumption, life-span length to light-emitting diode.Therefore, LED is in being widely used in the special association area that various light requirements source provides in the life now.For example, apply to the backlight module of display, indicator light light source, general lighting equipment or the like.Wherein because LED has the energy saving advantage that is showing especially, so under the illumination purpose of widespread the most, it is especially important that its practicality just seems.
The power supply unit principle of conventional ADS driving LED light fixture, mainly be after utilizing input one High Level AC Voltage that it is utilized rectification, filtering, convert it to low-voltage AC through transformer, again it is utilized rectifier and electrochemical capacitor filter circuit to be processed into DC voltage-stabilizing output, be provided with driving corresponding LED light fixture.So, though the known practice is to utilize the big capacitance characteristic of electrochemical capacitor that the ripple situation is reduced, and then reach the output of stable DC.But, make electrochemical capacitor seem shorter usually compared to its life-span of electric capacity of other kinds because most external environment factors all can influence the deterioration of electrolytic capacitor performance.And the hugest with temperature in environmental factor to the influence of electrochemical capacitor life-span, for example be wherein one of reason by the high heat that ripple current caused.Because high heat can make and cause electrolytic capacitor performance accelerated deterioration life-span and static capacity all to shorten to and have only original part that its filter capacitor function equals ineffective thus.Therefore, vertical LED lamp life is grown but can't effectively be arranged in pairs or groups with the filter capacitor of equivalent life, still can't be provided with the normal operation of LED light fixture.
In view of this, the inventor feels it and does not attain and improve and exhaust its intelligence hammer away, and be engaged in this industry accumulating experience for many years with it, and then develop a kind of LED lamp power feeding mechanism, mainly be to utilize human eye vision to persist principle and the voltage waveform of modulation driving LED and frequency and make it still can keep operate as normal.Simultaneously owing to need not convert alternating voltage to stable DC output as known, and must utilize long non-electrolytic capacitor of life-span is the usefulness of its filtering, the any voltage waveform FREQUENCY CONTROL that exports the LED light fixture to is equaled 60 hertz big Chu, and a peak of ripple signal is controlled at more than or equal to 1 volt peak value.Or be aided with FEEDBACK CONTROL again and make it to be maintained at output in this working range, the effectively start of driving LED light fixture improves whole useful life.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of human eye vision that utilizes to persist principle with the voltage waveform of modulation driving LED and frequency and the LED lamp power feeding mechanism that still can keep operate as normal that makes.
For reaching above-mentioned purpose, the present invention proposes a kind of LED lamp power feeding mechanism, the waveform and frequency modulating module, isolating transformer and the secondary commutation filtration module that comprise coupling successively, a high-voltage alternating signal that wherein mainly utilizes an isolating transformer to import converts a low-voltage alternating-current signal to, and then produce a driving voltage and be provided with the driving LED light fixture, this waveform and frequency modulating module, be to be located at this isolating transformer primary side, the modulating signal that is provided with input is an input waveform and a frequency f, and this frequency f 〉=60Hz; And this secondary commutation filtration module, be to be located at this isolating transformer secondary side, be provided with this low-voltage alternating-current signal behind this isolating transformer is converted to this driving voltage, this driving voltage is to be a low pressure ripple signal again, and a peak of this low pressure ripple signal is to peak delta V 〉=1.
Wherein this waveform and frequency modulating module are to comprise a switch element and a pwm control circuit.Wherein this secondary commutation filtration module is to comprise a level rectification circuit and a level filter circuit, and this secondary filter circuit is to have a non-electrolytic capacitor, in order to improve useful life.For example wherein this non-electrolytic capacitor is to draw electric capacity for a metal skin membrane capacitance or a wheat.
And for exporting this driving voltage continually and steadily, LED lamp power feeding mechanism of the present invention, more can comprise: a feedback control module is to be located at this isolating transformer secondary side and to connect this secondary commutation filtration module and this waveform and the frequency modulating module of this isolating transformer primary side of FEEDBACK CONTROL.Wherein this feedback control module is to have a feedback circuit, an integrating circuit and an optical coupler.
It is again the effect of voltage stabilizing behind the reinforcement modulation, LED lamp power feeding mechanism of the present invention, more can comprise: an elementary rectification filtering module is to be located at this isolating transformer primary side and will to be sent to this waveform and frequency modulating module behind this high-voltage alternating signal rectifying and wave-filtering.
Effect of the present invention mainly is to utilize human eye vision to persist principle and the voltage waveform of modulation driving LED and frequency and make still can keep operate as normal.Simultaneously owing to need not convert alternating voltage to stable DC output as known, and must utilize long non-electrolytic capacitor of life-span is the usefulness of its filtering, more than or equal to 60 hertz, a peak of ripple signal is controlled at more than or equal to 1 volt peak value with any voltage waveform FREQUENCY CONTROL of exporting the LED light fixture to.Or being aided with the output in this working range that is maintained at that FEEDBACK CONTROL makes again, the effectively start of driving LED light fixture improves whole useful life.
Description of drawings
Fig. 1 is the LED lamp power supply first preferred embodiment block schematic diagram of the present invention;
Fig. 2 is the wave form varies figure of LED lamp power supply of the present invention first preferred embodiment;
Fig. 3 is the LED lamp power supply second preferred embodiment block schematic diagram of the present invention;
Fig. 4 is LED lamp power supply the 3rd a preferred embodiment block schematic diagram of the present invention.
Description of reference numerals:
1-waveform and frequency modulating module; The 10-switch element; The 12-PWM control circuit; The 2-isolating transformer; 3-secondary commutation filtration module; 30-secondary commutation circuit; 32-level filter circuit; The 4-LED light fixture; The 5-feedback control module; The 50-feedback circuit; The 52-integrating circuit; The 54-optical coupler; The elementary rectification filtering module of 6-; The elementary rectification circuit of 60-; The elementary filter circuit of 62-; P1～P4-voltage waveform; Δ V-peak is to peak value.
Embodiment
For enabling the clear content of the present invention of understanding, it is graphic sincerely to arrange in pairs or groups in the following instructions, please consult.
Seeing also Fig. 1, is to be the LED lamp power supply first preferred embodiment block schematic diagram of the present invention.By the figure sight, present embodiment provides a kind of LED lamp power feeding mechanism, mainly be that a high-voltage alternating signal that utilizes an isolating transformer 2 to import converts a driving voltage to and is provided with the driving LED light fixture, also comprise: a waveform and frequency modulating module 1 and a level rectification filtering module 3.This waveform and frequency modulating module 1 are to be located at this isolating transformer 2 primary sides, are provided with modulation one an input waveform and a frequency f, and this frequency f 〉=60Hz.Utilize this waveform and frequency modulating module 1 the present invention can be applicable to any pulse wave waveform catalog driving LED light fixture 4.For example triangular wave, square wave (square wave) or string ripple all can be driving voltage pulse wave waveform of the present invention.The modulation of this frequency f 〉=60Hz then is for making human eye can reach the effect of the persistence of vision.Therefore, when the input High Level AC Voltage behind this waveform and frequency modulating module 1 modulation of this primary side, just voltage transitions is become a low-voltage alternating-current signal through this isolating transformer 2.At this moment, this low-voltage alternating-current signal through this secondary commutation filtration module 3, converts this driving voltage to again.This driving voltage is to be a low pressure ripple signal again, and a peak of this low pressure ripple signal makes it to be able to the start of effective driving LED light fixture to peak delta V 〉=1, the useful life that raising is whole.
Seeing also Fig. 2, is the wave form varies figure for LED lamp power supply of the present invention first preferred embodiment.P1～P4 shown in the figure is promptly at the voltage oscillogram of each stage behind modulation.Change in time, this P1 is the high-voltage alternating waveform without modulation; This P2 is waveform behind this waveform and frequency modulating module 1 modulation then.This waveform and frequency modulating module 1 are to comprise a switch element 10 and a pwm control circuit 12 (with reference to Fig. 4).String ripple modulation can be become square wave (square wave) waveform by this, and change its work frequency (dutycycle) its output frequency f value is controlled under f 〉=60Hz condition.Meeting down this P3 is to be this low-voltage alternating-current signal behind these isolating transformer 2 secondary side modulations; I.e. this driving voltage waveform behind these secondary commutation filtration module 3 modulations and be that a low pressure connects the ripple signal of this P4 at last.Because but this secondary commutation filtration module 3 is for this P3 waveform being tended towards stability need not the direct current output of the fixed value that reaches stable, therefore this secondary commutation filtration module 3 is to comprise a level rectification circuit 30 and a level filter circuit 32, and this secondary filter circuit 32 is to have a non-electrolytic capacitor.Because the non-electrolysis electricity electric capacity life-span is longer compared to electrochemical capacitor,, be easy to generate the ripple phenomenon though therefore its capacitance is selected for use lowlyer.But see through the principle that human eye vision persists, these suitable driving frequency f and peaks of ripple signal collocation are driving voltage of the present invention to peak delta V, stablizing output fixedly under the situation of direct voltage, still effectively driven this LED light fixture 4, significantly promote the life-span of its whole use.This non-electrolytic capacitor is to select that to draw electric capacity as a metal skin membrane capacitance or a wheat be that it implements element for use again.
Seeing also Fig. 3, is to be the LED lamp power supply second preferred embodiment block schematic diagram of the present invention.Present embodiment is relative first embodiment, more comprises a feedback control module 5, is to be continual and steady this driving voltage of output, is provided with effectively keeping this LED light fixture 4 of driving.And this feedback control module 5 is to be located at these isolating transformer 2 secondary sides and to connect this secondary commutation filtration module 3 and this waveform and the frequency modulating module 1 of these isolating transformer 2 primary sides of FEEDBACK CONTROL.And wherein this feedback control module 5 is to have a feedback circuit 50, an integrating circuit 52 and an optical coupler 54 (with reference to Fig. 4).Can find out its average voltage by this integrating circuit 52, make with more accurate FEEDBACK CONTROL.Not only but this optical coupler 54 is transmitting signals but also the purpose that can reach electrical obstruct.In the start, these optical coupler 54 FEEDBACK CONTROL secondaries are surveyed and are for example decided voltage or decide the reference signal of current feedback signal as modulation.For example when these optical coupler 54 voltages reach given voltage, promptly pass signal back and these pwm control circuit 12 ON time are closed (promptly being output as zero).
Seeing also Fig. 4, is to be LED lamp power supply the 3rd preferred embodiment block schematic diagram of the present invention.Present embodiment is under the second embodiment framework, more adds an elementary rectification filtering module 6, and it is to be located at the primary side of this isolating transformer 2 and will to be sent to this waveform and frequency modulating module 1 behind this high-voltage alternating signal rectifying and wave-filtering.Its objective is and be the voltage regulation result behind the reinforcement modulation.Be with these secondary commutation filtration module 3 something in common, this elementary rectification filtering module 6 is to comprise an elementary rectification circuit 60 and an elementary filter circuit 62, and this elementary filter circuit 62 is to have a non-electrolytic capacitor, and this non-electrolytic capacitor is to can be a metal skin membrane capacitance or a wheat is drawn electric capacity.The purpose of selecting for use as for its element is described identical with aforementioned this secondary filter circuit 32, repeats no more in this.This elementary rectification circuit 60 is to be a bridge rectifier again, is to go filtering after the full-wave rectification again with this high-voltage alternating signal of input.As for follow-up running, then all identical with first and second embodiment, also repeat no more in this.
Effect of the present invention mainly is to utilize human eye vision to persist principle and the voltage waveform of modulation driving LED and frequency and make still can keep operate as normal.Simultaneously owing to need not convert alternating voltage to stable DC output as known, and must utilize long non-electrolytic capacitor of life-span is the usefulness of its filtering, more than or equal to 60 hertz, a peak of ripple signal is controlled at more than or equal to 1 volt peak value with any voltage waveform FREQUENCY CONTROL of exporting the LED light fixture to.Or being aided with the output in this working range that is maintained at that FEEDBACK CONTROL makes again, the effectively start of driving LED light fixture improves whole useful life.
The above, it only is preferred embodiment of the present invention, be not in order to limit scope of the invention process, so done equivalence or variation person easily Deng haveing the knack of this technology, not breaking away from the equalization variation of being done under spirit of the present invention and the scope and modification, all should be covered by in the claim of the present invention.
Claims (10)
1. a LED lamp power feeding mechanism is characterized in that, comprises waveform and frequency modulating module, isolating transformer and the secondary commutation filtration module of coupling successively, wherein,
The high-voltage alternating signal that isolating transformer will be imported converts a low-voltage alternating-current signal to, and then produces a driving voltage and be provided with the driving LED light fixture,
Waveform and frequency modulating module are to be located at this isolating transformer primary side, are an input waveform and a frequency f with the modulating signal of importing, and this frequency f 〉=60Hz; And
The secondary commutation filtration module, be to be located at this isolating transformer secondary side, be provided with this low-voltage alternating-current signal behind this isolating transformer is converted to this driving voltage, this driving voltage is to be a low pressure ripple signal again, and the peak of this low pressure ripple signal is to peak delta V 〉=1.
2. LED lamp power feeding mechanism according to claim 1 is characterized in that, this waveform and frequency modulating module are to comprise a switch element and a pwm control circuit.
3. according to claim 1 or 2 each described LED lamp power feeding mechanism wherein, it is characterized in that this secondary commutation filtration module be to comprise a level rectification circuit and a level filter circuit, and this secondary filter circuit has a non-electrolytic capacitor.
4. LED lamp power feeding mechanism according to claim 3 is characterized in that, this non-electrolytic capacitor is that a metal skin membrane capacitance or a wheat are drawn electric capacity.
5. LED lamp power feeding mechanism according to claim 3, it is characterized in that, more comprise: a feedback control module is to be located at this isolating transformer secondary side and to connect this secondary commutation filtration module and this waveform and the frequency modulating module of this isolating transformer primary side of FEEDBACK CONTROL.
6. LED lamp power feeding mechanism according to claim 5 is characterized in that this feedback control module has a feedback circuit, an integrating circuit and an optical coupler.
7. LED lamp power feeding mechanism according to claim 5 is characterized in that, more comprises: an elementary rectification filtering module is to be located at this isolating transformer primary side and will to be sent to this waveform and frequency modulating module behind this high-voltage alternating signal rectifying and wave-filtering.
8. LED lamp power feeding mechanism according to claim 7 is characterized in that, this elementary rectification filtering module be to comprise an elementary rectification circuit and an elementary filter circuit, and this elementary filter circuit has a non-electrolytic capacitor.
9. LED lamp power feeding mechanism according to claim 8 is characterized in that, this non-electrolytic capacitor is that a metal skin membrane capacitance or a wheat are drawn electric capacity.
10. LED lamp power feeding mechanism according to claim 8 is characterized in that this elementary rectification circuit is a bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102189467A CN102300359A (en) | 2010-06-25 | 2010-06-25 | Power supply device of light emitting diode (LED) lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102189467A CN102300359A (en) | 2010-06-25 | 2010-06-25 | Power supply device of light emitting diode (LED) lamp |
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| Publication Number | Publication Date |
|---|---|
| CN102300359A true CN102300359A (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102189467A Pending CN102300359A (en) | 2010-06-25 | 2010-06-25 | Power supply device of light emitting diode (LED) lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020087199A1 (en) * | 2018-10-29 | 2020-05-07 | Tridonic Gmbh & Co Kg | Power supply for lamp |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2233591Y (en) * | 1995-01-19 | 1996-08-21 | 连云港市对外贸易公司 | Safety lamp for use in darkroom |
| US6490177B1 (en) * | 1998-10-05 | 2002-12-03 | Salvador Figueroa | Resonant power converter with primary-side tuning and zero-current switching |
| CN1893752A (en) * | 2006-05-09 | 2007-01-10 | 上海维同照明电器有限公司 | LED constant-flow driver |
| CN101374380A (en) * | 2007-07-27 | 2009-02-25 | 财团法人工业技术研究院 | Light source device and drive device thereof |
| CN201204722Y (en) * | 2007-12-28 | 2009-03-04 | 王元成 | Automatic light-adjusting LED illumination driver |
| US20100039047A1 (en) * | 2008-08-12 | 2010-02-18 | Rohm Co., Ltd. | Drive Device for Performing Electric Power Conversion by Using Switching Element |
| CN101682950A (en) * | 2007-03-30 | 2010-03-24 | 霍尔迪普有限公司 | improvements relating to lighting systems |
-
2010
- 2010-06-25 CN CN2010102189467A patent/CN102300359A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2233591Y (en) * | 1995-01-19 | 1996-08-21 | 连云港市对外贸易公司 | Safety lamp for use in darkroom |
| US6490177B1 (en) * | 1998-10-05 | 2002-12-03 | Salvador Figueroa | Resonant power converter with primary-side tuning and zero-current switching |
| CN1893752A (en) * | 2006-05-09 | 2007-01-10 | 上海维同照明电器有限公司 | LED constant-flow driver |
| CN101682950A (en) * | 2007-03-30 | 2010-03-24 | 霍尔迪普有限公司 | improvements relating to lighting systems |
| CN101374380A (en) * | 2007-07-27 | 2009-02-25 | 财团法人工业技术研究院 | Light source device and drive device thereof |
| CN201204722Y (en) * | 2007-12-28 | 2009-03-04 | 王元成 | Automatic light-adjusting LED illumination driver |
| US20100039047A1 (en) * | 2008-08-12 | 2010-02-18 | Rohm Co., Ltd. | Drive Device for Performing Electric Power Conversion by Using Switching Element |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020087199A1 (en) * | 2018-10-29 | 2020-05-07 | Tridonic Gmbh & Co Kg | Power supply for lamp |
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Application publication date: 20111228 |