CN103415124B - A kind of LED with bidirectional triode thyristor ballast - Google Patents
A kind of LED with bidirectional triode thyristor ballast Download PDFInfo
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- CN103415124B CN103415124B CN201310380226.4A CN201310380226A CN103415124B CN 103415124 B CN103415124 B CN 103415124B CN 201310380226 A CN201310380226 A CN 201310380226A CN 103415124 B CN103415124 B CN 103415124B
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- triode thyristor
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Abstract
The invention discloses a kind of LED with bidirectional triode thyristor ballast, including thermoinduction unit, power adjustment unit, direct-current LED lamp plate and bridge rectifier, thermoinduction unit is electrically connected with successively with bridge rectifier, direct-current LED lamp plate, and power adjustment unit is electrically connected with power supply and bridge rectifier.Thermoinduction unit includes that critesistor and current-limiting resistance, critesistor and current-limiting resistance are coupled.Present invention utilizes the critesistor and current-limiting resistance being coupled, make current-limiting resistance change of electric current in galvanization, and the size of the heat produced, have influence on the size of the impedance of critesistor, then the size of this critesistor impedance is on the impact of power adjustment unit in circuit, the power making circuit is adjusted, and reaches the effect of adjusting brightness of LED lamps or ballast.
Description
Technical field
The present invention relates to LED field, a kind of LED with bidirectional triode thyristor ballast.
Background technology
The light fixture made because of LED, has power consumption low, generates heat little, and service life, the advantage such as length, was widely used in every field.Owing to the drive circuit of traditional LED lamp pipe or bulb employs electrolysis condenser and driving component, although efficiency and outputting current steadily, but existing LED drive circuit, its life-span is far away from LED, often LED is not the most damaged, and drive circuit is died the most ahead of time.In order to extend the life-span of LED, the life-span of drive circuit need to strengthen.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, it is provided that a kind of can with the life-span of LED the suitable LED with bidirectional triode thyristor ballast.
For solving above-mentioned technical problem, the technical solution used in the present invention is: a kind of LED with bidirectional triode thyristor ballast, including thermoinduction unit, power adjustment unit, direct-current LED lamp plate and bridge rectifier, described thermoinduction unit is electrically connected with successively with bridge rectifier, direct-current LED lamp plate, and described power adjustment unit is electrically connected with power supply and described bridge rectifier；Described thermoinduction unit includes that critesistor and current-limiting resistance, described critesistor and current-limiting resistance are coupled；Described power adjustment unit includes polarity free capacitor, resistance, bidirectional trigger diode and bidirectional triode thyristor；Described polarity free capacitor and resistance composition RC circuit, the heat produced by current-limiting resistance, changed the impedance of critesistor, thus change the discharge and recharge time of RC circuit, thus change the bidirectional trigger diode triggered time to bidirectional triode thyristor phase place；The one of power supply extremely concatenates with critesistor, and the two ends of this critesistor are in parallel with the polarity free capacitor in power adjustment unit；This polarity free capacitor is in parallel with bidirectional trigger diode again, and resistance is in parallel with this bidirectional trigger diode again after connecting with bidirectional triode thyristor；Node between bridge rectifier with resistance with bidirectional triode thyristor is connected, and this bridge rectifier is connected another of power source with current-limiting resistance after also concatenating extreme；The other two ends of this bridge rectifier connect direct-current LED lamp plate.
In technique scheme, critesistor is pasted on current-limiting resistance by heat-conducting glue；Or critesistor is pasted sheet type thermistor, current-limiting resistance is SMD current-limiting resistance, and this pasted sheet type thermistor and SMD current-limiting resistance are welded on the pad being mutually adjacently.
In technique scheme, critesistor is negative tempperature coefficient thermistor.
A kind of LED with bidirectional triode thyristor ballast, including thermoinduction unit, power adjustment unit and AC LED lamp plate, described thermoinduction unit is electrically connected with AC LED lamp plate, and described power adjustment unit is electrically connected with power supply and described AC LED lamp plate；Described power adjustment unit includes polarity free capacitor, resistance, bidirectional trigger diode and bidirectional triode thyristor；Described polarity free capacitor and resistance composition RC circuit, the heat produced by current-limiting resistance, changed the impedance of critesistor, thus change the discharge and recharge time of RC circuit, thus change the bidirectional trigger diode triggered time to bidirectional triode thyristor phase place；The one of power supply extremely concatenates with critesistor, and the two ends of this critesistor are in parallel with the polarity free capacitor in power adjustment unit again；This polarity free capacitor is in parallel with bidirectional trigger diode again, and resistance is in parallel with this bidirectional trigger diode again after connecting with bidirectional triode thyristor；Another of power supply is extreme, current-limiting resistance concatenates and be connected to the node between resistance and bidirectional triode thyristor with AC LED lamp plate.
In technique scheme, critesistor is pasted on current-limiting resistance by heat-conducting glue；Or critesistor is pasted sheet type thermistor, current-limiting resistance is SMD current-limiting resistance, and this pasted sheet type thermistor and SMD current-limiting resistance are welded on the pad being mutually adjacently.
In technique scheme, critesistor is negative tempperature coefficient thermistor.
The invention has the beneficial effects as follows: mainly make use of the critesistor and current-limiting resistance being coupled, make current-limiting resistance change of electric current in galvanization, and the size of the heat produced, have influence on the size of the impedance of critesistor, then the size of this critesistor impedance is on the impact of power adjustment unit in circuit, the power making circuit is adjusted, and reaches the effect of adjusting brightness of LED lamps or ballast.The framework of the present invention is simplified, do not use electrolysis condenser, inductance, transformator and chip, so fault rate is far below using the LED of conventional switch mode drive circuit, reach without Radio frequency interference, high brightness, operating current is little, framework is simplified, low cost, circuit reliability height and the advantage such as overall efficiency is good.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of first embodiment of the invention；
Fig. 2 is the circuit diagram of second embodiment of the invention.
Detailed description of the invention
The present invention is further detailed explanation below in conjunction with the accompanying drawings.
First embodiment, as shown in Figure 1, a kind of LED with bidirectional triode thyristor ballast, including thermoinduction unit 1, power adjustment unit 4, bridge rectifier 2 and direct-current LED lamp plate 3, thermoinduction unit 1 concatenates with bridge rectifier 2, direct-current LED lamp plate 3, and power adjustment unit 4 connects power supply and bridge rectifier 2.Wherein, thermoinduction unit 1 is coupled to form by negative tempperature coefficient thermistor NTC and current-limiting resistance Ra, power adjustment unit 4 is formed by connecting by polarity free capacitor Cb, resistance Rb, bidirectional trigger diode DIAC and bidirectional triode thyristor TRIAC, bridge rectifier 2 is formed by connecting by diode D1, D2, D3, D4, and direct-current LED lamp plate 3 is made up of the light-emitting diode group parallel connection again of some series connection.Its circuit connecting relation is as follows: the one of power supply is extreme, polarity free capacitor Ca concatenates with negative tempperature coefficient thermistor NTC, and this polarity free capacitor Ca is in parallel with the polarity free capacitor Cb in power adjustment unit 4 again with the two ends of negative tempperature coefficient thermistor NTC；This polarity free capacitor Cb is in parallel with bidirectional trigger diode DIAC again, and resistance Rb is in parallel with this bidirectional trigger diode DIAC again after connecting with bidirectional triode thyristor TRIAC；Node between bridge rectifier 2 with resistance Rb with bidirectional triode thyristor TRIAC is connected, and this bridge rectifier 2 is connected another of power source with current-limiting resistance Ra after also concatenating extreme；These other two ends of bridge rectifier 2 connect direct-current LED lamp plate 3.In this thermoinduction unit 1, negative tempperature coefficient thermistor NTC heat-conducting glue is pasted on current-limiting resistance Ra, or SMD negative tempperature coefficient thermistor NTC and SMD current-limiting resistance Ra is welded on the pad being mutually adjacently.During electric power starting, the thermoinduction unit 1 that the electric current of bridge rectifier 2 and direct-current LED lamp plate 3 is constituted through current-limiting resistance Ra and negative tempperature coefficient thermistor NTC, during energising, the electric current through current-limiting resistance Ra is the biggest, the heat produced is the highest, the impedance making the negative tempperature coefficient thermistor NTC near this current-limiting resistance Ra diminishes, make the polarity free capacitor Ca being connected with negative tempperature coefficient thermistor NTC, and the polarity free capacitor Cb in power adjustment unit 4, the RC discharge and recharge time that resistance Rb is constituted is elongated, the phase place that bidirectional triode thyristor TRIAC is triggered by sluggish bidirectional trigger diode DIAC, the power of this whole LED with bidirectional triode thyristor ballast can be automatically increased or decreased, with lightness stabilized or direct-current LED lamp plate 3 is reached the purpose of ballast.
Second embodiment, as in figure 2 it is shown, a kind of LED with bidirectional triode thyristor ballast, including thermoinduction unit 1, power adjustment unit 4 and AC LED lamp plate 5, thermoinduction unit 1 concatenates with AC LED lamp plate 5, and power adjustment unit 4 connects power supply.Wherein, thermoinduction unit 1 is coupled to form by negative tempperature coefficient thermistor NTC and current-limiting resistance Ra, power adjustment unit 4 is formed by connecting by polarity free capacitor Cb, resistance Rb, bidirectional trigger diode DIAC and bidirectional triode thyristor TRIAC, and after the light-emitting diode group series connection that AC LED lamp plate 5 is composed in parallel by some groups of two light emitting diodes, parallel connection is constituted again.The one of power supply is extreme, polarity free capacitor Ca concatenates with negative tempperature coefficient thermistor NTC, and this polarity free capacitor Ca is in parallel with the polarity free capacitor Cb in power adjustment unit 4 again with the two ends of negative tempperature coefficient thermistor NTC；This polarity free capacitor Cb is in parallel with bidirectional trigger diode DIAC again, and resistance Rb is in parallel with this bidirectional trigger diode DIAC again after connecting with bidirectional triode thyristor TRIAC；Another of power supply is extreme, current-limiting resistance Ra concatenates and be connected to the node between resistance Rb and bidirectional triode thyristor TRIAC with AC LED lamp plate 5.In this thermoinduction unit 1, negative tempperature coefficient thermistor NTC heat-conducting glue is pasted on current-limiting resistance Ra, or SMD negative tempperature coefficient thermistor NTC and SMD current-limiting resistance Ra is welded on the pad being mutually adjacently.During electric power starting, the thermoinduction unit 1 that the electric current of bridge rectifier 2 and direct-current LED lamp plate 3 is constituted through current-limiting resistance Ra and negative tempperature coefficient thermistor NTC, during energising, the electric current through current-limiting resistance Ra is the biggest, the heat produced is the highest, the impedance making the negative tempperature coefficient thermistor NTC near this current-limiting resistance Ra diminishes, make the polarity free capacitor Ca concatenated with negative tempperature coefficient thermistor NTC, and the Cb of electric capacity without memory in power adjustment unit 4, the RC discharge and recharge time that resistance Rb is constituted is elongated, the phase place that bidirectional triode thyristor TRIAC is triggered by sluggish bidirectional trigger diode DIAC, the power of this whole LED with bidirectional triode thyristor ballast can be automatically increased or decreased, with lightness stabilized or AC LED lamp plate 5 is reached the purpose of ballast.
This a kind of LED with bidirectional triode thyristor ballast, its operation principle is as follows: after switching on power, the biggest through the electric current of current-limiting resistance Ra, the heat produced is the highest, the impedance making negative tempperature coefficient thermistor NTC diminishes, the polarity free capacitor Ca connected because of negative tempperature coefficient thermistor NTC, in parallel with the polarity free capacitor Cb in power adjustment unit 4 again, therefore negative tempperature coefficient thermistor NTC, the total capacitance quantitative change of polarity free capacitor Ca and polarity free capacitor Cb is big, the RC discharge and recharge time making this total capacitance and resistance Rb be constituted is elongated, the phase place that bidirectional triode thyristor TRIAC is triggered by sluggish bidirectional trigger diode DIAC, the power making whole lamp reduces；When the power of whole lamp reduces, electric current through current-limiting resistance Ra diminishes, the heat produced tails off, the impedance making negative tempperature coefficient thermistor NTC becomes big, the polarity free capacitor Ca connected because of negative tempperature coefficient thermistor NTC, in parallel with the polarity free capacitor Cb in power adjustment unit 4, therefore negative tempperature coefficient thermistor NTC, the total capacitance of polarity free capacitor Ca and polarity free capacitor Cb diminishes, the RC discharge and recharge time making this total capacitance and resistance Rb be constituted shortens, the phase place that bidirectional triode thyristor TRIAC is triggered by reach bidirectional trigger diode DIAC, the power making this whole lamp raises, above action goes round and begins again；So as to automatically increasing or decreasing the power of this whole lamp, with lightness stabilized or (direct current or exchange) LED lamp panel is reached the purpose of ballast.
Above-mentioned power supply can be civil power, say, that this kind of LED with bidirectional triode thyristor ballast can be directly connected to the civil power of 220V.
Owing to the framework of the present invention is simplified, do not use electrochemical capacitor, inductance, transformator and chip, so fault rate is far below using the LED of conventional switch mode drive circuit, reach, low cost, circuit reliability height little without Radio frequency interference, high brightness, operating current and the advantage such as whole structure is good.
Above embodiment is merely illustrative and not limiting to the invention, therefore all equivalence changes done according to the method described in present patent application scope or modification, in the range of being all included in present patent application.
Claims (4)
1. one kind with the LED of bidirectional triode thyristor ballast, it is characterized in that: include thermoinduction unit, power adjustment unit, direct-current LED lamp plate and bridge rectifier, described thermoinduction unit is electrically connected with successively with bridge rectifier, direct-current LED lamp plate, and described power adjustment unit is electrically connected with power supply and described bridge rectifier；Described thermoinduction unit includes that critesistor and current-limiting resistance, described critesistor and current-limiting resistance are coupled；Described power adjustment unit includes polarity free capacitor Cb, resistance, bidirectional trigger diode and bidirectional triode thyristor；Polarity free capacitor Ca, described polarity free capacitor Cb and resistance composition RC circuit, the heat produced by current-limiting resistance, change the impedance of critesistor, thus change the discharge and recharge time of RC circuit, thus change the bidirectional trigger diode triggered time to bidirectional triode thyristor phase place；The one of power supply is extreme, polarity free capacitor Ca concatenates with critesistor, and this polarity free capacitor Ca is in parallel with the polarity free capacitor Cb in power adjustment unit again with the two ends of critesistor；This polarity free capacitor Cb is in parallel with bidirectional trigger diode again, and resistance is in parallel with this bidirectional trigger diode again after connecting with bidirectional triode thyristor；Node between bridge rectifier with resistance with bidirectional triode thyristor is connected, and this bridge rectifier is connected another of power source with current-limiting resistance after also concatenating extreme；The other two ends of this bridge rectifier connect direct-current LED lamp plate；Described critesistor is negative tempperature coefficient thermistor.
A kind of LED with bidirectional triode thyristor ballast the most according to claim 1, it is characterised in that: described critesistor is pasted on described current-limiting resistance by heat-conducting glue；Or described critesistor is pasted sheet type thermistor, described current-limiting resistance is SMD current-limiting resistance, and this pasted sheet type thermistor and SMD current-limiting resistance are welded on the pad being mutually adjacently.
3. one kind with the LED of bidirectional triode thyristor ballast, it is characterized in that: include thermoinduction unit, power adjustment unit and AC LED lamp plate, described thermoinduction unit is electrically connected with AC LED lamp plate, and described power adjustment unit is electrically connected with power supply and described AC LED lamp plate；Described power adjustment unit includes polarity free capacitor, resistance, bidirectional trigger diode and bidirectional triode thyristor；Polarity free capacitor Ca, described polarity free capacitor Cb and resistance composition RC circuit, the heat produced by current-limiting resistance, change the impedance of critesistor, thus change the discharge and recharge time of RC circuit, thus change the bidirectional trigger diode triggered time to bidirectional triode thyristor phase place；The one of power supply is extreme, polarity free capacitor Ca concatenates with critesistor, and this polarity free capacitor Ca is in parallel with the polarity free capacitor Cb in power adjustment unit again with the two ends of critesistor；This polarity free capacitor Cb is in parallel with bidirectional trigger diode again, and resistance is in parallel with this bidirectional trigger diode again after connecting with bidirectional triode thyristor；Another of power supply is extreme, current-limiting resistance concatenates and be connected to the node between resistance and bidirectional triode thyristor with AC LED lamp plate；Described critesistor is negative tempperature coefficient thermistor.
A kind of LED with bidirectional triode thyristor ballast the most according to claim 3, it is characterised in that: described critesistor is pasted on described current-limiting resistance by heat-conducting glue；Or described critesistor is pasted sheet type thermistor, described current-limiting resistance is SMD current-limiting resistance, and this pasted sheet type thermistor and SMD current-limiting resistance are welded on the pad being mutually adjacently.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310380226.4A CN103415124B (en) | 2013-08-28 | 2013-08-28 | A kind of LED with bidirectional triode thyristor ballast |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310380226.4A CN103415124B (en) | 2013-08-28 | 2013-08-28 | A kind of LED with bidirectional triode thyristor ballast |
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| CN103415124A CN103415124A (en) | 2013-11-27 |
| CN103415124B true CN103415124B (en) | 2016-10-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104602382A (en) * | 2015-02-15 | 2015-05-06 | 黄焕珠 | Alternating-current LED bulb lamp |
| CN104703355A (en) * | 2015-03-23 | 2015-06-10 | 沈阳北星仪表制造有限公司 | Closed-loop control LED power supply |
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| CN2178975Y (en) * | 1994-01-28 | 1994-10-05 | 涂生旺 | Electronic temp. controlled, temp. regulation type milk lukewarm apparatus for baby |
| CN2318787Y (en) * | 1997-11-27 | 1999-05-12 | 玄哲雄 | Multifunction temp. controller for electric blanket |
| CN202535612U (en) * | 2012-05-07 | 2012-11-14 | 佛山市华全电气照明有限公司 | Special dimming circuit for integrated LED (light-emitting diode) lamp |
| CN203435199U (en) * | 2013-08-28 | 2014-02-12 | 林士乾 | Bidirectional silicon controlled rectifier ballasted LED lamp |
| US8729809B2 (en) * | 2009-09-08 | 2014-05-20 | Denovo Lighting, Llc | Voltage regulating devices in LED lamps with multiple power sources |
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2013
- 2013-08-28 CN CN201310380226.4A patent/CN103415124B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2178975Y (en) * | 1994-01-28 | 1994-10-05 | 涂生旺 | Electronic temp. controlled, temp. regulation type milk lukewarm apparatus for baby |
| CN2318787Y (en) * | 1997-11-27 | 1999-05-12 | 玄哲雄 | Multifunction temp. controller for electric blanket |
| US8729809B2 (en) * | 2009-09-08 | 2014-05-20 | Denovo Lighting, Llc | Voltage regulating devices in LED lamps with multiple power sources |
| CN202535612U (en) * | 2012-05-07 | 2012-11-14 | 佛山市华全电气照明有限公司 | Special dimming circuit for integrated LED (light-emitting diode) lamp |
| CN203435199U (en) * | 2013-08-28 | 2014-02-12 | 林士乾 | Bidirectional silicon controlled rectifier ballasted LED lamp |
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Granted publication date: 20161005 Termination date: 20170828 |