CN103415124A - LED lamp achieving ballasting through bi-directional thyristor - Google Patents
LED lamp achieving ballasting through bi-directional thyristor Download PDFInfo
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- CN103415124A CN103415124A CN2013103802264A CN201310380226A CN103415124A CN 103415124 A CN103415124 A CN 103415124A CN 2013103802264 A CN2013103802264 A CN 2013103802264A CN 201310380226 A CN201310380226 A CN 201310380226A CN 103415124 A CN103415124 A CN 103415124A
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Abstract
The invention discloses an LED lamp achieving ballasting through a bi-directional thyristor. The LED lamp comprises a thermal induction unit, a power adjusting unit, a direct-current LED lamp panel and a bridge rectifier. The thermal induction unit is sequentially and electrically connected with the bridge rectifier and the direct-current LED lamp panel, and the power adjusting unit is electrically connected with a power supply and the bridge rectifier. The thermal induction unit comprises a thermo-sensitive resistor and a current-limiting resistor, wherein the thermo-sensitive resistor and the current-limiting resistor are coupled. By means of the thermo-sensitive resistor and the current-limiting resistor, the amount of heat, generated due to changes of currents in the electrifying process, of the current-limiting resistor influences the amount of impedance of the thermo-sensitive resistor, and accordingly the amount of the impedance of the thermo-sensitive resistor influences the power adjusting unit in a circuit, so that power of the circuit is adjusted. Besides, the effect of adjusting the brightness of the LED lamp or the ballasting effect is achieved.
Description
Technical field
The present invention relates to LED lamp field, particularly a kind of lamp of LED with the bidirectional triode thyristor ballast.
Background technology
Because of the light fixture that LED makes, have power consumption low, to generate heat little, the advantages such as long service life, be widely used in every field.Because the drive circuit of traditional LED fluorescent tube or bulb has used electrolytic capacitor and driving component, although efficiency and outputting current steadily, existing LED drive circuit, its life-span is far away from the LED lamp, often the LED lamp does not also damage, and drive circuit is died ahead of time.In order to extend the life-span of LED lamp, 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, and a kind of lamp of the LED with the bidirectional triode thyristor ballast that can be suitable with the life-span of LED is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of lamp of LED with the bidirectional triode thyristor ballast, comprise thermoinduction unit, power adjustments unit, direct-current LED lamp plate and bridge rectifier, thermoinduction unit and bridge rectifier, direct-current LED lamp plate are electrically connected successively, and the power adjustments unit is electrically connected power supply and bridge rectifier.
In technique scheme, the thermoinduction unit comprises thermistor and current-limiting resistance, and thermistor and current-limiting resistance are coupled.
In technique scheme, thermistor is pasted on current-limiting resistance by heat-conducting glue; Perhaps thermistor is pasted sheet type thermistor, and current-limiting resistance is SMD current-limiting resistance, and this pasted sheet type thermistor and SMD current-limiting resistance are welded on the pad of mutual vicinity.
In technique scheme, thermistor is negative tempperature coefficient thermistor.
In technique scheme, the power adjustments unit comprises polarity free capacitor, resistance, bidirectional trigger diode and bidirectional triode thyristor.
A kind of lamp of LED with the bidirectional triode thyristor ballast, comprise thermoinduction unit, power adjustments unit and AC LED lamp plate, and thermoinduction unit and AC LED lamp plate are electrically connected, and the power adjustments unit is electrically connected power supply and AC LED lamp plate.
In technique scheme, the thermoinduction unit comprises thermistor and current-limiting resistance, and thermistor and current-limiting resistance are coupled.
In technique scheme, thermistor is pasted on current-limiting resistance by heat-conducting glue; Perhaps thermistor is pasted sheet type thermistor, and current-limiting resistance is SMD current-limiting resistance, and this pasted sheet type thermistor and SMD current-limiting resistance are welded on the pad of mutual vicinity.
In technique scheme, thermistor is negative tempperature coefficient thermistor.
In technique scheme, the power adjustments unit comprises polarity free capacitor, resistance, bidirectional trigger diode and bidirectional triode thyristor.
The invention has the beneficial effects as follows: mainly utilized the thermistor and the current-limiting resistance that are coupled, make the variation of current-limiting resistance electric current in galvanization, and the size of the heat produced, have influence on the size of the impedance of thermistor, then the impact of the size of this thermistor impedance on power adjustments unit in circuit, the power of circuit is adjusted, and reached the effect of adjusting brightness of LED lamps or ballast.Framework of the present invention is simplified, do not use electrolytic capacitor, inductance, transformer and chip, advantages such as so failure rate, far below the LED lamp that adopts traditional switch formula drive circuit, reaches without radio frequency interference, high brightness, operating current is little, framework is simplified, low-cost, circuit reliability is high and overall efficiency is good.
The 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.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing.
The first embodiment, as shown in Figure 1, a kind of lamp of LED with the bidirectional triode thyristor ballast, comprise thermoinduction unit 1, power adjustments unit 4, bridge rectifier 2 and direct-current LED lamp plate 3, thermoinduction unit 1 is connected in series with bridge rectifier 2, direct-current LED lamp plate 3, and power adjustments 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 adjustments unit 4 is formed by connecting by polarity free capacitor Cb, resistance R b, bidirectional trigger diode DIAC and bidirectional triode thyristor TRIAC, bridge rectifier 2 is formed by connecting by diode D1, D2, D3, D4, direct-current LED lamp plate 3 by the light-emitting diode group of some series connection again parallel connection form.Its circuit connecting relation is as follows: one extreme, the polarity free capacitor Ca of power supply are connected in series with negative tempperature coefficient thermistor NTC, and this polarity free capacitor Ca is in parallel with the polarity free capacitor Cb in power adjustments 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 R b is with in parallel with this bidirectional trigger diode DIAC again after bidirectional triode thyristor TRIAC connects; Bridge rectifier 2 is connected with the node between bidirectional triode thyristor TRIAC with resistance R b, and this bridge rectifier 2 is also with after current-limiting resistance Ra serial connection to be connected another of power source extreme; The other two ends of this bridge rectifier 2 connect direct-current LED lamp plate 3.In this thermoinduction unit 1, negative tempperature coefficient thermistor NTC is pasted on current-limiting resistance Ra with heat-conducting glue, or SMD negative tempperature coefficient thermistor NTC and SMD current-limiting resistance Ra are welded on the pad of mutual vicinity.During electric power starting, the electric current process current-limiting resistance Ra of bridge rectifier 2 and direct-current LED lamp plate 3 and the thermoinduction unit 1 that negative tempperature coefficient thermistor NTC forms, electric current through current-limiting resistance Ra during energising is larger, the heat produced is higher, the impedance of the negative tempperature coefficient thermistor NTC of close this current-limiting resistance Ra is diminished, make the polarity free capacitor Ca be connected with negative tempperature coefficient thermistor NTC, and the polarity free capacitor Cb in power adjustments unit 4, it is elongated that the RC that resistance R b forms discharges and recharges the time, the phase place that sluggish bidirectional trigger diode DIAC triggers bidirectional triode thyristor TRIAC, can automatically increase or decrease the power of this whole lamp of LED with the bidirectional triode thyristor ballast, with lightness stabilized or direct-current LED lamp plate 3 is reached to the purpose of ballast.
The second embodiment, as shown in Figure 2, a kind of lamp of LED with the bidirectional triode thyristor ballast, comprise thermoinduction unit 1, power adjustments unit 4 and AC LED lamp plate 5, and thermoinduction unit 1 is connected in series with AC LED lamp plate 5, and power adjustments 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 adjustments unit 4 is formed by connecting by polarity free capacitor Cb, resistance R b, bidirectional trigger diode DIAC and bidirectional triode thyristor TRIAC, 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 again parallel connection form.One extreme, the polarity free capacitor Ca of power supply are connected in series with negative tempperature coefficient thermistor NTC, and this polarity free capacitor Ca is in parallel with the polarity free capacitor Cb in power adjustments 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 R b is with in parallel with this bidirectional trigger diode DIAC again after bidirectional triode thyristor TRIAC connects; Another of power supply is extreme, current-limiting resistance Ra is connected in series and is connected in the node between resistance R b and bidirectional triode thyristor TRIAC with AC LED lamp plate 5.In this thermoinduction unit 1, negative tempperature coefficient thermistor NTC is pasted on current-limiting resistance Ra with heat-conducting glue, or SMD negative tempperature coefficient thermistor NTC and SMD current-limiting resistance Ra are welded on the pad of mutual vicinity.During electric power starting, the electric current process current-limiting resistance Ra of bridge rectifier 2 and direct-current LED lamp plate 3 and the thermoinduction unit 1 that negative tempperature coefficient thermistor NTC forms, electric current through current-limiting resistance Ra during energising is larger, the heat produced is higher, the impedance of the negative tempperature coefficient thermistor NTC of close this current-limiting resistance Ra is diminished, make the polarity free capacitor Ca be connected in series with negative tempperature coefficient thermistor NTC, and in power adjustments unit 4 without memory capacitor C b, it is elongated that the RC that resistance R b forms discharges and recharges the time, the phase place that sluggish bidirectional trigger diode DIAC triggers bidirectional triode thyristor TRIAC, can automatically increase or decrease the power of this whole lamp of LED with the bidirectional triode thyristor ballast, with lightness stabilized or AC LED lamp plate 5 is reached to the purpose of ballast.
This a kind of lamp of LED with the bidirectional triode thyristor ballast, its operation principle is as follows: after switching on power, electric current through current-limiting resistance Ra is larger, the heat produced is higher, the impedance of negative tempperature coefficient thermistor NTC is diminished, polarity free capacitor Ca because of negative tempperature coefficient thermistor NTC connection, in parallel with the polarity free capacitor Cb in power adjustments 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 large, it is elongated that the RC that this total capacitance and resistance R b are formed discharges and recharges the time, the phase place that sluggish bidirectional trigger diode DIAC triggers bidirectional triode thyristor TRIAC, the power of whole lamp is reduced, when the power of whole lamp reduces, electric current through current-limiting resistance Ra diminishes, the heat produced tails off, make the impedance of negative tempperature coefficient thermistor NTC become large, polarity free capacitor Ca because of negative tempperature coefficient thermistor NTC connection, in parallel with the polarity free capacitor Cb in power adjustments unit 4, therefore negative tempperature coefficient thermistor NTC, the total capacitance of polarity free capacitor Ca and polarity free capacitor Cb diminishes, the RC that this total capacitance and resistance R b are formed discharges and recharges the time and shortens, the phase place that reach bidirectional trigger diode DIAC triggers bidirectional triode thyristor TRIAC, the power of this whole lamp is raise, 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 interchange) LED lamp plate is reached to the purpose of ballast.
Above-mentioned power supply can be civil power, that is to say the civil power that can this a kind of lamp of LED with the bidirectional triode thyristor ballast can directly connect 220V.
Because framework of the present invention is simplified, do not use electrochemical capacitor, inductance, transformer and chip, so failure rate far below the LED lamp that adopts traditional switch formula drive circuit, reaches without radio frequency interference, high brightness, the advantage such as operating current is little, low-cost, circuit reliability is high and whole structure is good.
Above embodiment is merely illustrative and not limiting to the invention, therefore all equivalences of doing according to the described method of patent claim of the present invention change or modify, is included in patent claim of the present invention.
Claims (10)
1. lamp of the LED with the bidirectional triode thyristor ballast, it is characterized in that: comprise thermoinduction unit, power adjustments unit, direct-current LED lamp plate and bridge rectifier, described thermoinduction unit and bridge rectifier, direct-current LED lamp plate are electrically connected successively, and described power adjustments unit is electrically connected power supply and described bridge rectifier.
2. a kind of lamp of LED with the bidirectional triode thyristor ballast according to claim 1, it is characterized in that: described thermoinduction unit comprises thermistor and current-limiting resistance, and described thermistor and current-limiting resistance are coupled.
3. a kind of lamp of LED with the bidirectional triode thyristor ballast according to claim 2, it is characterized in that: described thermistor is pasted on described current-limiting resistance by heat-conducting glue; Perhaps described thermistor is pasted sheet type thermistor, and 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 of mutual vicinity.
4. a kind of lamp of LED with the bidirectional triode thyristor ballast according to claim 3, it is characterized in that: described thermistor is negative tempperature coefficient thermistor.
5. a kind of lamp of LED with the bidirectional triode thyristor ballast according to claim 1, it is characterized in that: described power adjustments unit comprises polarity free capacitor, resistance, bidirectional trigger diode and bidirectional triode thyristor.
6. lamp of the LED with the bidirectional triode thyristor ballast, it is characterized in that: comprise thermoinduction unit, power adjustments unit and AC LED lamp plate, described thermoinduction unit and AC LED lamp plate are electrically connected, and described power adjustments unit is electrically connected power supply and described AC LED lamp plate.
7. a kind of lamp of LED with the bidirectional triode thyristor ballast according to claim 6, it is characterized in that: described thermoinduction unit comprises thermistor and current-limiting resistance, and described thermistor and current-limiting resistance are coupled.
8. a kind of lamp of LED with the bidirectional triode thyristor ballast according to claim 7, it is characterized in that: described thermistor is pasted on described current-limiting resistance by heat-conducting glue; Perhaps described thermistor is pasted sheet type thermistor, and 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 of mutual vicinity.
9. a kind of lamp of LED with the bidirectional triode thyristor ballast according to claim 8, it is characterized in that: described thermistor is negative tempperature coefficient thermistor.
10. a kind of lamp of LED with the bidirectional triode thyristor ballast according to claim 6, it is characterized in that: described power adjustments unit comprises polarity free capacitor, resistance, bidirectional trigger diode and bidirectional triode thyristor.
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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 true CN103415124A (en) | 2013-11-27 |
| CN103415124B CN103415124B (en) | 2016-10-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (5)
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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 |
-
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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Publication date |
|---|---|
| CN103415124B (en) | 2016-10-05 |
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Granted publication date: 20161005 Termination date: 20170828 |