CN102149233B - LED (Light Emitting Device) light source control device - Google Patents
LED (Light Emitting Device) light source control device Download PDFInfo
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- CN102149233B CN102149233B CN201010108397.8A CN201010108397A CN102149233B CN 102149233 B CN102149233 B CN 102149233B CN 201010108397 A CN201010108397 A CN 201010108397A CN 102149233 B CN102149233 B CN 102149233B
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Abstract
The invention relates to an LED (Light Emitting Device) light source control device which comprises a rectifying circuit, a filtering circuit and a current limiting and over-current protection circuit. An input end of the rectifying circuit is electrically connected with the utility power, an output end of the rectifying circuit is connected with the filtering circuit. An output end of the filtering circuit is connected to an LED light source, and an output end of the current limiting and over-current protection circuit is connected with the LED light source. A first piezoresistor with first stage protection and a first capacitor are connected in series between a live wire and a null line of the utility power. Bleeder resistors are connected in parallel at two ends of the first capacitor. Anti-surge inductors are connected on the live wire of an input end of the utility power in series. The heat radiation degree of the LED light source self is well controlled by the device, the heat radiation area of the LED light source self is enlarged, the work temperature of the LED light source self is lowered, and the service life of the LED is prolonged. The LED is more efficient and more safe and saves more energy.
Description
Technical field
The present invention relates to a kind of light source control device of illuminating lamp, specifically a kind of LED light source control device.
Background technology
LED light source has high energy-conservation, high light efficiency, high brightness and the characteristic such as environment friendly and pollution-free, the energy consumption of LED (white light) is only 1/10 of incandescent lamp, and 1/4 of electricity-saving lamp economizes on electricity more than 80% than conventional incandescent, under equal-wattage, brightness is 10 times of incandescent lamp, luminous efficiency is up to 100lm/w, colour temperature 2700K-6400K, and color rendering index is more than 80, extra long life, being the more than 50 times of traditional tungsten lamp life-span, can reaching 6-10 ten thousand hours useful life, is latest generation energy-conserving and environment-protective light sources.
The operating voltage of LED is all very low at present, and generally, between direct current 2.6V-3.8V, electric current is in 20mA left and right.The conventional method that electric main is converted to the operating voltage of LED is, after employing transformer pressure-reducing or Switching Power Supply step-down, rectifying and wave-filtering carrys out driving LED light source again, but this power supply is lighted in LED light source work and self also consumed a part of electric energy in startup, these proportion of goods damageds of evidence are at 15-30%.Be subject in addition the restriction of the factors such as volume and cost and operating efficiency; the most simple and practical method is exactly by tens of LED strings together; directly with civil power, add dual current limliting and protective circuit; rectifying and wave-filtering carrys out driving LED again; take the driving power of capacitance decompression current limliting way more or less all to have inefficiency, unstable properties; civil power is required to high drawback, and due to expensive, the application of LED light source, universal, promote and have difficulty in taking a step.
Summary of the invention
The weak points such as the inefficiency existing for LED light source control device in prior art, unstable properties, the technical problem to be solved in the present invention is to provide the LED illuminating lamp control device of clear, the simple joint of a kind of circuit, lower cost for material.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
LED light source control device of the present invention comprises rectification circuit, filter circuit, current limliting and current foldback circuit; wherein; the input of rectification circuit is connected with civil power; output is connected to filter circuit; the output of filter circuit is connected to LED light source, and the output of current limliting and current foldback circuit connects LED light source.
Between the live wire of described civil power and zero line, connect and there is the first piezo-resistance and first electric capacity of first class of protection; The bleeder resistance in parallel at the first electric capacity two ends; On the live wire of mains electricity input end, be in series with Anti-surging inductance; Described filter circuit comprises the second electric capacity, the second inductance and the second resistance, and wherein the second electric capacity is connected between the output and ground of rectification circuit, and the output of rectification circuit is connected to LED light source by the second resistance and the second inductance; The 3rd electric capacity that there is the second piezo-resistance, the 5th diode of second class protection effect and there is time delay cushioning effect in parallel also between the output of described filter circuit and ground wire;
Described current limliting and current foldback circuit are an oscillating circuit being comprised of first and second triode, transformer and the 5th electric capacity, wherein the base stage of the first triode connects the collector electrode of the second triode, the emitter of the first triode connects the base stage of the second triode, the emitter of the first triode is by the 7th grounding through resistance, the grounded emitter of the second triode, the collector electrode of the first triode is parallel to respectively the two ends of the 5th electric capacity by the secondary winding of the 6th diode and transformer, the two ends of the 5th electric capacity are connected with LED light source group; Armature winding one end of transformer is connected with the base stage of the first triode, other end ground connection.
Described LED light source is many groups LED assemblies in parallel, and every group of LED assembly is divided into again the LED group of a plurality of series connection, and each LED group is composed in series by a plurality of LED, the voltage stabilizing didoe DW that is connected in parallel of each LED group; LED light source is installed on wide circuit lamp plate, and LED adopts large bonding pad lamp base.
The present invention has following beneficial effect and advantage:
1. apparatus of the present invention have adopted high-efficiency power, wide circuit lamp plate, LED to adopt large bonding pad lamp base structure, well controlled the degree of heat radiation of LED light source itself, strengthen the area of dissipation of LED light source self, reduced the working temperature of LED self, extended the useful life of LED.
2. the electric energy of apparatus of the present invention own loss 3-5%, constant-current supply work is more stable, and operating efficiency is higher, when guaranteeing the normal steady operation of LED light source, more efficient, energy-conservation, safety.
3. apparatus of the present invention circuit is clear, letter saves, lower cost for material, is conducive to apply.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
As shown in Figure 1; LED light source control device of the present invention comprises rectification circuit, filter circuit, current limliting and current foldback circuit; wherein; the input of rectification circuit is connected with civil power; output is connected to filter circuit; the output of filter circuit is connected to a plurality of LED light source groups, and the output of current limliting and current foldback circuit and a plurality of LED light source group also connect.
Between the live wire of described civil power and zero line, connect and there is the first piezo-resistance RS1 and first capacitor C 1 of first class of protection, at the first capacitor C 1 two ends bleeder resistance R1 in parallel; On the live wire of mains electricity input end, be in series with Anti-surging inductance L 1;
Described filter circuit comprises the second capacitor C 2, the second inductance L 2 and the second resistance R 2, wherein the second capacitor C 2 is connected between the output and ground of rectification circuit, and the output of rectification circuit is connected to the LED light source group of a plurality of parallel connections by the second resistance R 2 and the second inductance L 2;
The 3rd capacitor C 3 that there is the second piezo-resistance RS2, the 5th diode D5 of second class protection effect and there is time delay cushioning effect in parallel also between the output of described filter circuit and ground wire.
Described current limliting and current foldback circuit are an oscillating circuit being comprised of first and second triode Q1, Q2, seven～ten resistance R 7～R10 the 5th, six capacitor C 5, C6 transformer TF1 and the 6th diode D6, wherein the base stage of the first triode Q1 connects the collector electrode of the second triode Q2, simultaneously by the 8th resistance R 8 and the 4th capacitor C 4 ground connection; The emitter of the first triode Q1 connects the base stage of the second triode Q2 by the tenth resistance R 10, simultaneously, the emitter of the first triode Q1 is by the 7th resistance R 7 ground connection, the collector electrode of the first triode Q1 is parallel to the two ends of the 5th capacitor C 5 by the secondary winding of the 6th capacitor C 6 and transformer TF1 respectively, and exports LED light source group to; Elementary one end ground connection of transformer TF1, another is connected with the base stage of the first triode Q1 with the 6th capacitor C 6 by the 9th resistance R 9.
The present embodiment is at apparatus of the present invention front end; be the input of civil power utilize the first piezo-resistance RS1, as the first class of protection of load; in filter circuit, utilize the second piezo-resistance RS2 as the second class protection of load; because piezo-resistance can be released mutation current effectively at voltage jump moment (as thunder and lightning, large power consumption equipment starting etc.); thereby protection load; the response time of piezo-resistance is generally at Millisecond; the high voltage pulse voltage of moment in input power can be released over the ground, thereby protection LED is not punctured by instantaneous pressure.
The first capacitor C 1 act as step-down and current limliting, the characteristic of electric capacity be logically exchange, stopping direct current, when electric capacity is connected in alternating current circuit, its capacitive reactance computing formula is:
XC＝1/2πfC
In formula, XC represents the capacitive reactance of electric capacity, and f represents that the frequency C of input ac power represents the capacity of decompression capacitor.
The Current calculation formula that flows through capacity voltage dropping circuit is:
I＝U/XC
In formula, I represents to flow through the electric current of electric capacity, and U represents that supply voltage XC represents the capacitive reactance of electric capacity.
In the alternating current circuit of 220V, 50Hz, when load voltage is far smaller than 220V, the relational expression of electric current and electric capacity is:
The I=69C wherein unit of electric capacity is uF, and the unit of electric current is mA.
Bleeder resistance R1 act as: when sine wave is when peak-peak is cut off constantly, remaining electric charge in the first capacitor C 1 cannot discharge, president stored for a long time, if human body touches the metal part of the first capacitor C 1 when maintenance, there is strong electric shock possibility, and the existence of bleeder resistance R1 can be fallen remaining charge discharging resisting, thereby guarantee man-machine safety.The resistance of bleeder resistance R1 is relevant with the size of electric capacity, and the capacity of general electric capacity is larger, and remaining electric charge is just more, and the resistance of bleeder resistance C1 will be selected less.
The rectifier bridge that rectification circuit adopts the first～4 diode D1-D4 to form, its effect is to be pulsating dc voltage by AC rectification.
The filter circuit filtering High-frequency Interference that the second inductance L 2, the second capacitor C 2 and the second resistance R 2 form, the effect of the 3rd capacitor C 3 is that the pulsating dc voltage after rectification is filtered into steady direct voltage.Because the first capacitor C 1 can not provide large electric current, the charging interval of the 3rd capacitor C 3 is long, so the voltage in the 3rd capacitor C 3 can not suddenly change, plays like this effect and the soft start effect of protection load.The 5th diode D5 and the second piezo-resistance RS2 form pressure-sensitive protective circuit.
In the present embodiment, LED light source is many groups LED assemblies in parallel, and every group of LED assembly is divided into again the LED group of a plurality of series connection, and each LED group is composed in series by a plurality of LED.The voltage stabilizing didoe DW that is connected in parallel of each LED group, can guarantee the normal work of LED light source.When LED assembly Li Youyige LED group breaks down, during corrupted, other LED group can also continue normal work.
LED is a kind of solid-state semiconductor device, and the heart of LED is a semi-conductive wafer, and one end of wafer is attached on a support, and one end is negative pole, and the other end connects the positive pole of power supply, and whole wafer is got up by epoxy encapsulation.Practical semiconductor wafer is comprised of three parts, and a part is P type semiconductor, in its hole, the inside, occupies an leading position, and the other end is N type semiconductor, here, is mainly electronics, the middle normally quantum well in 1 to 5 cycle.When electric current acts on this wafer by wire, electronics and hole will be pushed to quantum well, and in quantum well, electronics, with hole-recombination, then will send energy with the form of photon.
Apparatus of the present invention are extremely important crucial parts in LED light source application, and its Main Function is driving LED light source.The present invention can emit a large amount of heats in the course of the work according to LED, make tube core junction temperature increase rapidly, LED power is higher, heating effect is larger, the rising of LED chip temperature will cause variation and the electro-optical efficiency decay of luminescent device performance, when serious, even lost efficacy, experiment test shows: 5 degrees Celsius of the every risings of LED self temperature, the characteristic of luminous flux decline 3%, the variation of electric current in power-supply system while taking into full account design constant pressure and flow and the variation of input line voltage in its driving power circuit, because if the voltage of power supply, curent change can cause the heat increase of LED light source own to cause LED light source to produce rapidly light decay.The present embodiment has adopted high-efficiency power, wide circuit lamp plate, LED adopts large bonding pad lamp base, has well controlled the heat radiation work of LED light source itself, has strengthened the area of dissipation of LED light source self, reduce the working temperature of LED self, extended the useful life of LED.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. a LED light source control device, it is characterized in that comprising: rectification circuit, filter circuit, current limliting and current foldback circuit, wherein, the input of rectification circuit is connected with civil power, output is connected to filter circuit, the output of filter circuit is connected to LED light source, and the output of current limliting and current foldback circuit connects LED light source;
Described filter circuit comprises the second electric capacity (C2), the second inductance (L2) and the second resistance (R2), wherein the second electric capacity (C2) is connected between the output and ground of rectification circuit, and the output of rectification circuit is connected to LED light source by the second resistance (R2) and the second inductance (L2);
Second piezo-resistance (RS2) with second class protection effect in parallel also between the output of described filter circuit and ground wire, the 5th diode (D5) and there is the 3rd electric capacity (C3) of time delay cushioning effect;
Described current limliting and current foldback circuit are one by first, two triode (Q1, Q2), the oscillating circuit that transformer (TF1) and the 5th electric capacity (C5) form, wherein the base stage of the first triode (Q1) connects the collector electrode of the second triode (Q2), the emitter of the first triode (Q1) connects the base stage of the second triode (Q2), the emitter of the first triode (Q1) is by the 7th resistance (R7) ground connection, the grounded emitter of the second triode (Q2), the collector electrode of the first triode (Q1) is parallel to respectively the two ends of the 5th electric capacity (C5) by the secondary winding of the 6th diode (D6) and transformer (TF1), the two ends of the 5th electric capacity (C5) are connected with LED light source group, armature winding one end of transformer (TF1) is connected with the base stage of the first triode (Q1), other end ground connection.
2. by LED light source control device claimed in claim 1, it is characterized in that: between the live wire of described civil power and zero line, connect and there is the first piezo-resistance (RS1) and first electric capacity (C1) of first class of protection.
3. by LED light source control device claimed in claim 2, it is characterized in that: the bleeder resistance (R1) in parallel at the first electric capacity (C1) two ends.
4. by LED light source control device claimed in claim 1, it is characterized in that: on the live wire of mains electricity input end, be in series with Anti-surging inductance (L1).
5. by LED light source control device claimed in claim 1, it is characterized in that: described LED light source is many groups LED assembly in parallel, every group of LED assembly is divided into again the LED group of a plurality of series connection, and each LED group is composed in series by a plurality of LED, the voltage stabilizing didoe DW that is connected in parallel of each LED group.
6. by LED light source control device claimed in claim 5, it is characterized in that: LED light source is installed on wide circuit lamp plate, LED adopts large bonding pad lamp base.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010108397.8A CN102149233B (en) | 2010-02-10 | 2010-02-10 | LED (Light Emitting Device) light source control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010108397.8A CN102149233B (en) | 2010-02-10 | 2010-02-10 | LED (Light Emitting Device) light source control device |
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| CN102149233A CN102149233A (en) | 2011-08-10 |
| CN102149233B true CN102149233B (en) | 2014-03-19 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510620A (en) * | 2011-10-28 | 2012-06-20 | 周宏标 | LED (light-emitting diode) light source module |
| CN103166440A (en) * | 2013-01-31 | 2013-06-19 | 佛山市华全电气照明有限公司 | Light-emitting diode (LED) rectifying circuit drainage high-voltage surge circuit |
| CN106376150A (en) * | 2015-07-22 | 2017-02-01 | 山东骏风电子有限公司 | Balance breathing lamp |
| CN106993354A (en) * | 2017-03-31 | 2017-07-28 | 苏州市霜地节能科技有限公司 | Capacitance decompression inductance anti-surge circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420804A (en) * | 2008-11-13 | 2009-04-29 | 沈锦祥 | High power LED lamp driving power source and combination of matched lamp |
| CN201260260Y (en) * | 2007-12-17 | 2009-06-17 | 顾茂章 | LED driver circuit capable of long lighting using alternating current electrical main supply |
| CN201312402Y (en) * | 2008-12-02 | 2009-09-16 | 田冬华 | LED lamp constant current circuit |
| CN201383889Y (en) * | 2009-04-01 | 2010-01-13 | 谢建强 | LED circuit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201260260Y (en) * | 2007-12-17 | 2009-06-17 | 顾茂章 | LED driver circuit capable of long lighting using alternating current electrical main supply |
| CN101420804A (en) * | 2008-11-13 | 2009-04-29 | 沈锦祥 | High power LED lamp driving power source and combination of matched lamp |
| CN201312402Y (en) * | 2008-12-02 | 2009-09-16 | 田冬华 | LED lamp constant current circuit |
| CN201383889Y (en) * | 2009-04-01 | 2010-01-13 | 谢建强 | LED circuit |
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