CN102595718A - Circuit for enhancing use reliability of discrete LED light source - Google Patents
Circuit for enhancing use reliability of discrete LED light source Download PDFInfo
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- CN102595718A CN102595718A CN2012100215907A CN201210021590A CN102595718A CN 102595718 A CN102595718 A CN 102595718A CN 2012100215907 A CN2012100215907 A CN 2012100215907A CN 201210021590 A CN201210021590 A CN 201210021590A CN 102595718 A CN102595718 A CN 102595718A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention relates to a circuit for enhancing the use reliability of a discrete LED (Light-Emitting Diode) light source and belongs to the technical field of LED lighting. The circuit comprises an aluminum base copper-clad plate, a discrete LED light source D11, a diode D21, a pressure-sensitive resistor R1 and a recoverable fuse R2, wherein the aluminum base copper-clad plate is divided by an insulating material and forms a positive electrode end and a negative electrode end; the discrete LED light source D11, the diode D21, the pressure-sensitive resistor R1 and the recoverable fuse R2 are fixed on the aluminum base copper-clad plate; one end of the recoverable fuse R2 is connected with the positive electrode end of the aluminum base copper-clad plate, and the other end of the recoverable fuse R2 is connected with a positive electrode of the discrete LED light source D11, a negative electrode of the diode D21 and one end of the pressure-sensitive resistor R1; and a negative electrode of the discrete LED light source D11, a positive electrode of the diode D21 and the other end of the pressure-sensitive resistor R1 are connected with the negative electrode end of the aluminum base copper-clad plate. The circuit has the advantages that the problem of light attenuation generated to LED impact as the discrete LED light source D11 suffers from lightning surge and instantaneous power-on/off in the running process is solved, and the circuit has the advantages of energy conservation, long service, environment friendliness and low maintenance cost.
Description
Technical field
The invention belongs to the LED lighting technical field, be specifically related to a kind of circuit that increases discrete led light source dependability
Background technology
The appearance of
LED (Light-Emitting Diode) light source is the great invention second time behind incandescent lamp, and it will become the innovation in the light world.LED has the not available advantage of conventional light source as a kind of solid-state semiconductor cold light source: energy-efficient, extra long life, environmental protection, rich color and coefficient of safety are high.Along with the implementation of national energy-saving and emission-reduction policy, the LED light fixture has become one of present most popular semiconductor light source, has much the growth momentum that replaces conventional light source.Present LED light fixture, as emerging light fixture, a lot of products are widely used in the real life.But in actual use, life-span and theory having occurred differs too big, changes problems such as lamp rate height and maintenance cost height.
LED light decay is present its topmost two kinds of forms that lost efficacy with dead lamp, generally all is to be caused by fire damage and electric injury.The luminous efficiency of LED only can reach about 30% at present; That is to say that 70% power conversion has become heat energy, when normal the use, if can not in time heat be come out; This fire damage will cause the temperature of led chip to rise; Thereby cause that light intensity reduces, luminous efficiency reduces, quicken the light decay of LED, have a strong impact on the useful life of LED, become dead lamp at last; Simultaneously, encapsulating material at high temperature also can quick aging and is caused the decline of light transmittance.In order to reduce the caloric value of LED, reduce fire damage, can avoid through the appropriate design heat abstractor.The heat dissipation technology of LED comparative maturity in the market; Mainly be divided into active heat removal mode, passive radiating mode or mode that both combine; Wherein the active heat removal mode mainly adopts forced heat radiation modes such as fan; For example the disclosed name of utility model patent Granted publication CN202118739U is called " a kind of radiator structure of LED light fixture "; Passive radiating mode mainly adopts finned heat radiation, and this radiating mode has utilized the metal fever conduction effect, and for example the disclosed name of utility model patent Granted publication CN202118606U is called " a kind of LED bulb of alloy heat radiation ".
What
present technique scheme was mainly discussed is electric injury; LED is as a kind of semiconductor device; Major parameter has forward voltage drop Vf, DC Forward Current And if power etc., also has two important parameters in addition: reverse breakdown voltage Vbr and inverse peak current Irm.When the LED operate as normal; Can not relate to this two parameters; But when mains ripple, driving power energising/outage moment and lightning surge; If be applied to the nominal value that the voltage at LED two ends exceeds these two parameters, LED will receive irreversible electric injury, and this electric injury is the main cause that shows as light decay.See Fig. 1, Fig. 2, Fig. 3, Fig. 1 does not have reverse protection LED equivalent circuit diagram normally, and Fig. 2 is with reverse protection LED equivalent circuit diagram normally, and Fig. 3 is the equivalent circuit diagram after LED is reversed damage.Visible by figure, after LED was reversed the voltage and current damage, the electric current that is applied to the LED two ends was understood some and is flow through equivalent resistance Rx; Its resistance value is relevant with the LED damaged condition: damaged condition hour; Resistance value can reach tens kilohms, and when damaged condition was big, resistance value only had 1～2k Ω; Damage when very serious, resistance value only has hundreds of even tens ohm.This part energy can only be used for heating and no longer luminous, thereby forms the light decay of LED.And serious more when damage, the resistance value of equivalent resistance Rx is more little, and as equivalent resistance Rx during near 0 Ω, LED shows as short-circuit condition, and is no longer luminous.Fig. 4 is the aluminium base distributed capacitance sketch map of discrete led light source, and this distributed capacitance because both positive and negative polarity voltage pulsation takes place perhaps owing to induced voltage, all has the possibility of the discrete led light source of reverse breakdown on aluminium base.
Can for this reason, a kind of circuit that can effectively improve the anti-electric injury ability of LED is provided be that technical problem to be solved is arranged at present
Summary of the invention
the objective of the invention is to provide a kind of circuit that increases discrete led light source dependability, and not only circuit is simple and practical, reliability is high for it, with low cost, and can effectively reduce the electric injury of LED, reduce the light decay and dead lamp of LED.
the objective of the invention is to reach like this; A kind of circuit that increases discrete led light source dependability; Be characterized in: comprise an aluminium base copper-clad plate, discrete led light source D11, diode D21, piezo-resistance R1 and can recover fuse R2; Described aluminium base copper-clad plate is by the insulating material separation and form positive terminal, negative pole end; Described discrete led light source D11, diode D21, piezo-resistance R1 and can recover fuse R2 and be fixed in the aluminium base copper-clad plate; The positive terminal of the aluminium base copper-clad plate of a termination of fuse R2 can be recovered, positive pole, the negative pole of diode D21 and the end of piezo-resistance R1 of the discrete led light source D11 of another termination of fuse R2 can be recovered, the negative pole end of the aluminium base copper-clad plate of another termination of the positive pole of the negative pole of discrete led light source D11, diode D21 and piezo-resistance R1.
in a concrete embodiment of the present invention, the quantity of described discrete led light source D11 has a plurality of, constitutes between a plurality of discrete led light source D11 to be connected in series.
in another concrete embodiment of the present invention, the quantity of described diode D21 is identical with the quantity of described discrete led light source D11, and the last correspondence of each discrete led light source D11 is parallel with a diode D21.
in another concrete embodiment of the present invention, described diode D21 preferably adopts Schottky diode.
in of the present invention and then concrete embodiment, the operation voltage of described piezo-resistance R1 should be not less than n * Vf, and wherein, n is the number of the discrete led light source in the aluminium base copper-clad plate, and Vf is the forward voltage drop of discrete led light source D11.
more of the present invention and among concrete embodiment, 1.5～2 times of the operating current If that the described turn-off current that recovers fuse R2 is discrete led light source D11.
the present invention is through after adopting the foregoing circuit structure; Overcome discrete led light source in running because the light decay problem that suffers lightning surge and on/off electricity moment impact is produced to LED; The advantage energy-conservation, long-lived, environmental protection that led light source is had is able to really bring into play; And reduced owing to change the operating cost that light fixture brought, helped the large-scale production and the use of discrete led light source.
Description of drawings
Fig. 1 is normal no reverse protection LED equivalent circuit diagram.
Fig. 2 is normal band reverse protection LED equivalent circuit diagram.
Fig. 3 is reversed the equivalent circuit diagram after the damage for LED.
Fig. 4 is discrete led light source plate distributed capacitance diagrammatic sketch.
Fig. 5 is the circuit diagram of one embodiment of the invention.
Embodiment
can be expressly understood technical spirit of the present invention and beneficial effect more for the auditor that the makes Patent Office especially public; The applicant general combines accompanying drawing to elaborate with the mode of embodiment below; But the description to embodiment all is not the restriction to technical scheme of the present invention, any according to the present invention design done only for pro forma but not substantial equivalent transformation all should be regarded as technical scheme category of the present invention.
see also Fig. 5; A kind of circuit that increases discrete led light source dependability; Comprise an aluminium base copper-clad plate 1, discrete led light source D11, diode D21, piezo-resistance R1 and can recover fuse R2; Described aluminium base copper-clad plate 1 is soaked with resin for a kind of electronics glass cloth or other enhancement mode material; One side or two-sided covering with Copper Foil and the board-like material processed through hot pressing; Main play interconnected conducting, insulation, supporting role, in aluminium base copper-clad plate, be formed with positive terminal, negative pole end, and positive and negatively separate by insulating material between extreme; Described discrete led light source D11, diode D21, piezo-resistance R1 and can recover fuse R2 and be welded in the described aluminium base copper-clad plate 1; The positive terminal of the aluminium base copper-clad plate 1 of a termination of fuse R2 can be recovered, positive pole, the negative pole of diode D21 and the end of piezo-resistance R1 of the discrete led light source D11 of another termination of fuse R2 can be recovered, the negative pole end of the aluminium base copper-clad plate 1 of another termination of the positive pole of the negative pole of discrete led light source D11, diode D21 and piezo-resistance R1.
The quantity of
described discrete led light source D11 can have a plurality of, constitute between a plurality of discrete led light source D11 to be connected in series, and correspondence is parallel with a diode D21 on each discrete led light source D11.Specifically: the negative pole of the positive pole of first discrete led light source D11 and diode D21, the end of piezo-resistance R1 connect an end that can recover fuse R2 after being connected, the negative pole of an end discrete led light source D11 and the negative pole end that connects aluminium base copper-clad plate 1 after the positive pole of the individual diode D21 in end is connected.
Fig. 5 please be continued to consult in
; Diode connected in parallel D21 plays the reverse protection effect at the two ends of each discrete led light source D11; Diode D21 preferentially selects Schottky diode for use, and be nanosecond its recovery time, and the reverse breakdown voltage selection is not less than the forward voltage drop Vf of 1.5 times discrete led light source D11; The operation voltage of piezo-resistance R1 should adopt and be not less than n * Vf; Wherein, n is the number of the discrete led light source in the aluminium base copper-clad plate 1, and the turn-off current that can recover fuse R2 should be 1.5～2 times of operating current If of discrete led light source D11.
Operation principle of the present invention:
are when transient state both positive and negative polarity voltage is higher than the operation voltage of piezo-resistance R1 in the aluminium base copper-clad plate 1 that is welded with discrete led light source D11; Piezo-resistance R1 absorbs this pulse energy; But when pulse current greater than can recover the blowout current of fuse R2 the time, can recover fuse R2 and break off, to protect discrete led light source D11; Through time-delay after a while, can recover fuse R2 and recover.
when reverse induced voltage was added to the both positive and negative polarity of the aluminium base copper-clad plate 1 that is welded with discrete led light source D11, diode D21 forward conduction played the reverse protection effect, absorbs this energy.
In sum, technical scheme provided by the invention has overcome the shortcoming in the prior art, has reached goal of the invention, has embodied the described technique effect of applicant
Claims (6)
1.
a kind of circuit that increases discrete led light source dependability; It is characterized in that: comprise an aluminium base copper-clad plate (1), discrete led light source D11, diode D21, piezo-resistance R1 and can recover fuse R2; Described aluminium base copper-clad plate (1) is by the insulating material separation and form positive terminal, negative pole end; Described discrete led light source D11, diode D21, piezo-resistance R1 and can recover fuse R2 and be fixed in the aluminium base copper-clad plate (1); Can recover the positive terminal of the aluminium base copper-clad plate of a termination (1) of fuse R2; Can recover positive pole, the negative pole of diode D21 and the end of piezo-resistance R1 of the discrete led light source D11 of another termination of fuse R2, the negative pole end of the aluminium base copper-clad plate of another termination (1) of the positive pole of the negative pole of discrete led light source D11, diode D21 and piezo-resistance R1.
2.
a kind of circuit that increases discrete led light source dependability according to claim 1, the quantity that it is characterized in that described discrete led light source D11 has a plurality of, constitutes between a plurality of discrete led light source D11 to be connected in series.
3.
a kind of circuit that increases discrete led light source dependability according to claim 1; The quantity that it is characterized in that described diode D21 is identical with the quantity of described discrete led light source D11, and the last correspondence of each discrete led light source D11 is parallel with a diode D21.
4.
a kind of circuit that increases discrete led light source dependability according to claim 1 is characterized in that described diode D21 preferably adopts Schottky diode.
5.
a kind of circuit that increases discrete led light source dependability according to claim 1; The operation voltage that it is characterized in that described piezo-resistance R1 should be not less than n * Vf; Wherein, N is the number of the discrete led light source in the aluminium base copper-clad plate (1), and Vf is the forward voltage drop of discrete led light source D11.
6.
A kind of circuit that increases discrete led light source dependability according to claim 1 is characterized in that 1.5～2 times of operating current If that the described turn-off current that recovers fuse R2 is discrete led light source D11
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100215907A CN102595718A (en) | 2012-01-31 | 2012-01-31 | Circuit for enhancing use reliability of discrete LED light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100215907A CN102595718A (en) | 2012-01-31 | 2012-01-31 | Circuit for enhancing use reliability of discrete LED light source |
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| CN102595718A true CN102595718A (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100215907A Pending CN102595718A (en) | 2012-01-31 | 2012-01-31 | Circuit for enhancing use reliability of discrete LED light source |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108455A (en) * | 2013-01-16 | 2013-05-15 | 佛山市华全电气照明有限公司 | Drive and control circuit for preventing high-voltage thunder strike damage to light-emitting diode (LED) light source |
| CN104051446A (en) * | 2014-06-25 | 2014-09-17 | 浙江美晶科技有限公司 | Multi-chip transient voltage suppressor and transient voltage or ESD suppression method for any pole of double signal lines |
| CN104302063A (en) * | 2014-10-29 | 2015-01-21 | 东莞勤上光电股份有限公司 | LED circuit |
| CN104518504A (en) * | 2013-09-30 | 2015-04-15 | 深圳市海洋王照明工程有限公司 | Anti-surge circuit and LED lighting system |
| CN107454707A (en) * | 2017-05-15 | 2017-12-08 | 上海路傲电子科技有限公司 | A kind of LED illumination linear constant current drive circuit of absorbable metal substrate leakage stream |
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2012
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108455A (en) * | 2013-01-16 | 2013-05-15 | 佛山市华全电气照明有限公司 | Drive and control circuit for preventing high-voltage thunder strike damage to light-emitting diode (LED) light source |
| CN103108455B (en) * | 2013-01-16 | 2016-09-14 | 佛山市华全电气照明有限公司 | A kind of driving control circuit preventing LED light source high pressure broken by lightning |
| CN104518504A (en) * | 2013-09-30 | 2015-04-15 | 深圳市海洋王照明工程有限公司 | Anti-surge circuit and LED lighting system |
| CN104051446A (en) * | 2014-06-25 | 2014-09-17 | 浙江美晶科技有限公司 | Multi-chip transient voltage suppressor and transient voltage or ESD suppression method for any pole of double signal lines |
| CN104302063A (en) * | 2014-10-29 | 2015-01-21 | 东莞勤上光电股份有限公司 | LED circuit |
| CN107454707A (en) * | 2017-05-15 | 2017-12-08 | 上海路傲电子科技有限公司 | A kind of LED illumination linear constant current drive circuit of absorbable metal substrate leakage stream |
| WO2018210161A1 (en) * | 2017-05-15 | 2018-11-22 | 上海路傲电子科技有限公司 | Led-illumination linear and constant current driving circuit capable of absorbing metal substrate leakage current |
| CN107454707B (en) * | 2017-05-15 | 2024-01-30 | 上海路傲电子科技有限公司 | LED illumination linear constant current driving circuit capable of absorbing leakage current of metal substrate |
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Application publication date: 20120718 |