CN102843803A - Device for driving LED (light emitting diode) light source by using duplex output - Google Patents
Device for driving LED (light emitting diode) light source by using duplex output Download PDFInfo
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- CN102843803A CN102843803A CN 201110164529 CN201110164529A CN102843803A CN 102843803 A CN102843803 A CN 102843803A CN 201110164529 CN201110164529 CN 201110164529 CN 201110164529 A CN201110164529 A CN 201110164529A CN 102843803 A CN102843803 A CN 102843803A
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Abstract
The invention discloses a device for driving an LED (light emitting diode) light source by using duplex output. The device comprises an EMC (electro magnetic compatibility) filtering circuit, a PFC (power factor correction) active filtering circuit, a high frequency rectification filtering circuit, high frequency chopping power output circuits A and high frequency chopping power output circuits B, the device further comprises a current distributing circuit, a resonance circuit and a constant-current circuit, wherein the current distributing circuit, the resonance circuit and the constant-current circuit are connected with an LED light source group in series; and the LED light source group is composed of two groups of LED light sources which are connected in series; three or more than three groups of high frequency chopping power output circuits A are connected in series with the LED light source groups which are connected in series inside the high frequency chopping power output circuits A and output loops so as to provide the power; and three or more than three groups of high frequency chopping power output circuits B are connected in parallel with the LED light source groups which are connected in parallel inside the high frequency chopping power output circuits B and output loops so as to provide the power.
Description
Technical field
The present invention relates to the electric source lighting technical field, particularly relate to a kind of device of led light source of two-way output driving.
Background technology
The mode of the led light source of conventional ADS driving is to confirm to import line voltage, led light source voltage, led light source electric current, use high-precision constant-current source, adopts series-parallel mode driving LED light source.
The LED electric light source adopts the AC-DC technology to make a high-precision constant voltage, constant-current supply basically at present, adopts the mode driving LED light source of series and parallel.Led light source work basic principle is: between led light source the two poles of the earth, add a constant voltage, export a stable direct current by current feedback and supply power to led light source; Make led chip work trigger light-emitting phosphor; Luminous brightness depends primarily on the power and the fluorescent material area of led chip; Factors such as quality, because led chip operation principle and voltage-stabiliser tube are basic identical, promptly electric current alters a great deal in a very little change in voltage scope; For the operate as normal driving of led chip, led light source is to adopt high-precision voltage stabilizing, stabilized current supply driving LED light source that led light source is operated in the rated power scope basically.
Because civil power is 220V50Hz or 110V60HZ alternating current; Traditional method is that electric main is converted into direct current, utilizes various technology to adopt high-precision voltage stabilizing, current stabilization DC power supply driving LED light source, is operated in the rated power scope in order to make led light source; Most of projectors work hard on DC power voltage stabilizing, stabilized current power supply; Because led light source is not to form with a LEDs chip at present, led chip parameter inconsistency has increased design difficulty, and making driving LED light source power cost increase the power consumption of power supply own increases; Power-efficient is about 80%, and this is obvious by it when driving high-power LED light source.Single common in the market led light source parameter:
0.06WLED light source, operating voltage 3V-3.3V, operating current are 20MA.
0.1WLED light source, operating voltage 3V-3.6V, operating current are 30MA.
0.2WLED light source, operating voltage 3V-3.6V, operating current are 60MA.
The 1WLED light source, operating voltage 3V-3.6V, operating current are 300MA.
The 3WLED light source, operating voltage 3V-3.6V, operating current are 750MA.
Can know that according to above data the operating voltage excursion of led light source about about 15%-20% and operating current is required really very high, increases design difficulty greatly when many group led light source parallel operations.In addition; The producer that great majority are engaged in lighting technology exploitation, produce drops into the research that a large amount of manpowers, equipment, fund are devoted to the high-power LED light source driving power; Try hard to reduce power supply power consumption, improve output current, select the consistent methods such as led light source series and parallel of performance parameter to come the driving LED light source; Produce little effect, fail obviously to improve the power consumption and the led light source energy-saving effect of driving power.
In the prior art; Because most of traditional led light source driving power is low to the utilization rate of electric energy; Adopt the waste that conventional ADS driving power drives led light source lighting quality is not high, problems such as temperature is high, the led light source light decay big, life-span reduction have caused the raw material and the valuable energy; Fail to reach the led light source long service life, the effect that brightness is high, energy-conservation.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides that a kind of cost is low, lighting quality is high, effectively energy-conservation, the device of high efficiency two-way output driving LED light source.Comprise: EMC filter circuit, PFC active filter circuit, rectifier filter circuit, high frequency chopping power output circuit A, high frequency chopping power output circuit B; Also comprise current dividing circuit, resonant circuit, current stabilization circuit; Be connected in series with the led light source group in said current dividing circuit, resonant circuit, the current stabilization circuit, the led light source group is made up of more than two groups the led light sources that are connected in series.The mains supply input connects said EMC filter circuit; Said EMC filter circuit is exported to said PFC active filter circuit; Said PFC active filter circuit is exported to said rectifier filter circuit; The positive voltage output end of said rectifier filter circuit output is connected with the positive voltage input of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B respectively jointly; The negative voltage output of said rectifier filter circuit output is connected with the negative voltage input of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B respectively jointly, and said high frequency chopping power output circuit A is connected in parallel on the said current dividing circuit, resonant circuit, current stabilization circuit, the said led light source group that are connected in series in said high frequency chopping power output circuit A, the output loop electric power is provided more than three groups or three groups.Said high frequency chopping power output circuit B is connected in parallel on the said current dividing circuit, resonant circuit, current stabilization circuit, the said led light source group that are connected in series in said high frequency chopping power output circuit B, the output loop electric power is provided more than three groups or three groups.The technical scheme that the present invention adopted is: a kind of device of two-way output driving LED light source.Comprise: EMC filter circuit, active filter circuit, rectifier filter circuit, high frequency chopping power output circuit A, high frequency chopping power output circuit B, current dividing circuit, resonance phase-shift circuit, current stabilization circuit; Be connected in series with said led light source group in said current dividing circuit, resonance phase-shift circuit, the current stabilization circuit, said led light source group is made up of two groups many LED coupled in series light sources.
Said high frequency chopping power output circuit A, said high frequency chopping power output circuit B; The voltage of the identical but two-way of operating frequency output, the phase angle of electric current differ 180 degree; That is to say said high frequency chopping power output circuit A; Supply with institute for the said led light source group of load voltage, when electric current is positive half cycle; Said high frequency chopping power output circuit B; Supplying with institute is negative half period for the said led light source group of load voltage, electric current, and the electric current of the said high frequency chopping power output circuit of the two-way load A that for said rectifier filter circuit, is supplied with, said high frequency chopping power output circuit B is the some of cancelling out each other that can access of anti-phase, to reach purpose of energy saving.
Said current dividing circuit, resonance phase-shift circuit, current stabilization circuit are in series for the said led light source group of load by inductance coil, resonance phase shifting capacitor, said current dividing circuit and institute and form.Be connected with anti-open circuit, short-circuiting means described in the said led light source group between every led light source head end of two groups many LED coupled in series light sources and the tail end.Be connected with electrochemical capacitor between every group of said many LED coupled in series light source head end and the tail end in the said led light source group.
Said high frequency chopping power output circuit A, with said high frequency chopping power output circuit B be connected in parallel on said current dividing circuit, resonance phase-shift circuit, the current stabilization circuit that is connected in series in the output loop more than three groups or three groups; Said led light source group provides said current dividing circuit, resonance phase-shift circuit, the current stabilization circuit of electric power, and the line principle of said led light source group, connected mode, structure, parameter, performance are identical.
Said current dividing circuit, resonance phase-shift circuit, current stabilization circuit, be in series and form by said current dividing circuit, inductance coil, resonance shift capacitor, said led light source group; By said high frequency chopping power output circuit A, said high frequency chopping power output circuit B; Supply power to the said current dividing circuit that is connected in series, resonance phase-shift circuit, current stabilization circuit respectively, become the electric light source group with the led light source group; The said electric light source group of many groups; Resonance frequency after parallel connection one-tenth is as a whole is identical with the operating frequency of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B, and the current phase of every group of said electric light source group has nothing in common with each other.
The invention has the beneficial effects as follows: the present invention is owing to adopt high frequency switch power, and driving multiple sets electric light source group is worked the electric light source group under different time, different phase simultaneously.The electric light source group that current dividing circuit, resonance phase-shift circuit, current stabilization circuit, led light source group are formed can obtain higher photoelectric conversion efficiency under the prerequisite of using the less current effective value; Obviously improved lighting quality; Improved power factor; Effectively reduce the working temperature of led light source, guaranteed the useful life of led light source itself, thereby reach the purpose that saves material with the energy.
Utilize mains supply; The electric light source group that produces high frequency, high voltage output AC driving power driving LED light sources composition adopts high frequency voltage, electric current and current dividing circuit, and resonance phase-shift circuit, current stabilization circuit, driving LED light sources make the led light source group can under the prerequisite of using smaller power, obtain higher photoelectric conversion efficiency; Avale in led light source voltage consistency difference feelings led light source is operated under the rated power condition; Shunt driving LED light sources; Effectively utilized the led light source characteristic; Adopt the not different simultaneously phase driving LED light sources of two-way output, reach energy-conservation effect thereby driving power is reduced from the civil power consumed current.Can obtain the power savings of 60%-70% after the same led light source employing patent of the present invention.
Adopt the device of the led light source of a kind of two-way output of patent of the present invention driving, comparing with conventional ADS driving led light source mode can energy-conservation again 30%-50 under the situation of same illumination.
Description of drawings
Fig. 1 is that patent of the present invention is formed block diagram;
Fig. 2 is that the circuit of patent of the present invention composition side connects sketch map;
Fig. 3 is said current dividing circuit, resonance phase-shift circuit, the current stabilization circuit that patent of the present invention is connected in series, and is connected sketch map with the said led light source group circuit of forming that is in series;
Fig. 4 is that the circuit that the said led light source of patent of the present invention is connected in series connects sketch map.
Embodiment
Below in conjunction with accompanying drawing and embodiment patent of the present invention is done further explain:
Fig. 1 is the block diagram that patent of the present invention is formed.As shown in Figure 1, the device of the led light source that a kind of two-way output drives.Comprise: EMC filter circuit, PFC active filter circuit, rectifier filter circuit, high frequency chopping power output circuit A, high frequency chopping power output circuit B, led light source.The mains supply input connects said EMC filter circuit, said EMC filter circuit is exported to said PFC active filter circuit; Said PFC active filter circuit is exported to said rectifier filter circuit; The positive voltage output end of said rectifier filter circuit output is connected with the positive voltage input of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B respectively jointly; The negative voltage output of said rectifier filter circuit output is connected with the negative voltage input of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B respectively jointly, and said high frequency chopping power output circuit A is connected in parallel on the said led light source that is connected in parallel in said high frequency chopping power output circuit A, the output loop electric power is provided more than three groups or three groups.Said high frequency chopping power output circuit B is connected in parallel on the said led light source that is connected in parallel in said high frequency chopping power output circuit B, the output loop electric power is provided more than three groups or three groups.
Fig. 2 is that the circuit of patent of the present invention composition side connects sketch map.As shown in Figure 2, the device of the led light source that a kind of two-way output drives.Comprise: EMC filter circuit, PFC active filter circuit, rectifier filter circuit, high frequency chopping power output circuit A, high frequency chopping power output circuit B; Said high frequency chopping power output circuit A is connected in parallel on said current dividing circuit, resonance phase-shift circuit, the current stabilization circuit that is connected in series in the output loop more than three groups or three groups; With the said led light source group composition that is in series; Said high frequency chopping power output circuit B is connected in parallel on said current dividing circuit, resonance phase-shift circuit, the current stabilization circuit that is connected in series in the output loop more than three groups or three groups, with the said led light source group composition that is in series.Said led light source group is made up of said many led light sources that are connected in series.
Fig. 3 is said current dividing circuit, resonance phase-shift circuit, the current stabilization circuit that patent of the present invention is connected in series, and is connected sketch map with the said led light source group circuit of forming that is in series.As shown in Figure 3, the device of the led light source that a kind of two-way output drives.Said current dividing circuit, resonance phase-shift circuit, current stabilization circuit, be in series by said inductance coil, said resonance shift capacitor, said current dividing circuit and said led light source group and form said electric light source group, said many are connected in series and are connected with electrochemical capacitor between led light source head end and the tail end.Said current dividing circuit, resonance phase-shift circuit, current stabilization circuit, said led light source are made up of two groups of said many led light sources that are connected in series; Two groups of shared said current dividing circuits of said many led light sources that are connected in series, that is to say each said current dividing circuit, only give two groups of said many LED coupled in series light source power supplies, said current dividing circuit, be spaced apart 2 to 1 phase phasic differences 180 for two groups of said many led light source power-on times that are connected in series to spend.
Tradition led light source driving power is man-to-man.Have several groups of led light source groups that several led light source driving powers are just arranged, and the driving multiple sets that this device can a pair of n is in series and form said electric light source group by said current dividing circuit, resonance phase-shift circuit, current stabilization circuit, with said led light source group.When having cancelled n led light source driving power, differ 180 degree voltages, current drives with the two-way output phase and organize said electric light source group more, practiced thrift n-1 the power consumption that led light source driving power itself is had by oneself; Improved lighting quality; Reduced input current, the Harmonics of Input total amount has improved power factor; Reasonable distribution size, the ON time of every group of required electric current of said electric light source group, reached energy savings and raw-material purpose.
Patent work principle of the present invention is following: the alternating current of 220V50Hz or 110V60Hz; Behind over commutation with high-quality PFC active filter circuit; Quality will effectively be improved because of the current waveform that driving multiple sets led light source group changes, and reaches sinusoidal wave basically, simultaneously power factor is brought up to more than 0.99; And with direct voltage boost, voltage stabilizing, reach the needed voltage of the said electric light source group of driving multiple sets, electric current.Under the fluctuation of mains input voltage ± 30%, the VD of said PFC active filter circuit remains unchanged.
Through high-frequency rectification, filtered direct voltage; Through said high frequency chopping power output circuit A, said high frequency chopping power output circuit B; Obtain the alternating voltage output of a positive and negative symmetry of high frequency after the copped wave, said high frequency chopping power output circuit A, said high frequency chopping power output circuit B, output AC voltage; Effective value, frequency are in full accord, but the phase angle differs 180 degree. and basic high frequency chopping power output circuit can be half-bridge, full-bridge, resonant circuit etc.No matter adopt which kind of circuit, be the high-frequency alternating current of positive-negative half-cycle symmetry when doing load with the led light source group.
The output of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B, can be connected in parallel simultaneously drives three groups or three groups of above electric light source groups.The quantity of the electric light source group that drives of being connected in parallel depend on said high frequency chopping power output circuit A, said high frequency chopping power output circuit B, power output and the gross power of two groups of said many LED coupled in series light sources in the led light source group described in driven said electric light source group.Its computational methods:
The power output W=1.2Wd of high frequency chopping power output circuit.
Wd be driven the power summation of LED coupled in series light source.
Fig. 2 is the electric light source group sketch map that patent of the present invention is made up of said current dividing circuit, said inductance coil, said resonance shift capacitor, said current stabilization circuit and said led light source group; As shown in Figure 2; Every group of electric light source group that is connected in parallel; Form by 3 groups of-15 groups of led light source groups; Every group of led light source group is made up of two groups of said many LED coupled in series light sources, and the quantity of said many LED coupled in series light sources depends primarily on peak, the peak value of the high frequency voltage of said high frequency chopping power output circuit output, its computational methods:
Every group of LED coupled in series light source counted n=0.6Vpp/VD
Vpp: said high frequency chopping power output circuit A, said high frequency chopping power output circuit B, output voltage peak, peak value.
VD: every group of said many LED coupled in series light source voltage sums.
The power of many LED coupled in series light sources described in every group of said led light source group, pipe are pressed, operating current should be roughly the same.
Led light source group described in every group of said electric light source group with high frequency chopping power output circuit A, high frequency chopping power output circuit B; Should be connected in series when output is connected in parallel said current dividing circuit, resonance phase-shift circuit, current stabilization circuit, the effect of said current dividing circuit, resonance phase-shift circuit, current stabilization circuit is distribution, resonance phase shift, current stabilization.
Patent of the present invention adopts traditional inductance to carry out current limliting; Owing to be high frequency switch power; The frequency of its high frequency chopping power output is up to tens of kilocycles to kilocycles up to a hundred; Its current-limiting inductance is a high-frequency inductor; Significantly reduce when its volume, power consumption are all than civil power 50Hz frequency under the identical situation of induction reactance, high-quality said PFC active filter circuit, output has guaranteed that led light source is operated in the rated power in the excursion of stability in some thousandths of of said rectifier filter circuit, filtered direct voltage.
A kind of two-way of patent of the present invention is exported the device of the led light source that drives, and has changed the method for traditional driving power drives led light source.Because traditional led light source driving power directly comes the driving LED light source through high-precision constant voltage, constant current DC power supply with civil power 50Hz, that is to say that the led light source two ends make have a direct voltage and direct current to flow through led light source end in the led light source entire work process.Circuit of the present invention has adopted current dividing circuit, the rated current effective value of led light source has been divided into two gives two groups of identical led light source groups power supplies of number of parameters connected mode in different time respectively.Two groups of led light source groups always work in entire work process under bright, the dark state, because the operating frequency of current dividing circuit all can't be differentiated bright, dark variation up to tens kilocycle human eyes and common instrument and equipment.Brightness is constant if the device driving LED light source that adopts the voltage identical with the traditional driving led light source, current effective value to export the driving LED light source with a kind of two-way in theory can be practiced thrift the electric energy of half.
Furtherly; The every group of said current dividing circuit that is connected in series, resonance phase-shift circuit, current stabilization circuit that is connected in parallel in the said high frequency chopping power output circuit output formed series resonant circuit by said current-limiting inductance, said electrochemical capacitor, said resonance shift capacitor, said fast diode, said current dividing circuit, said led light source group; Its resonance frequency has nothing in common with each other; The phase place that electric current flows through every group of electric light source group also has nothing in common with each other; Electric light source group and other electric light source group of every group of said current dividing circuit that is connected in series, said resonance phase-shift circuit, said current stabilization circuit and said led light source group composition are connected in parallel on said high frequency chopping power output circuit A, said high frequency chopping power output circuit B; In the output loop; It is identical with the operating frequency of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B to become a resonance frequency after the overall load, owing to said high frequency chopping power output circuit A, said high frequency chopping power output circuit B, and phase phasic difference 180 degree of power output; The electric current that in the identical time, extracts from civil power will reduce; Consequently reduced the output current of said active filter circuit PFC and said rectifier filter circuit, thereby reached purpose of energy saving under the constant situation of every group of said electric light source group electric current guaranteeing.
The device of the led light source that the output of a kind of two-way of patent of the present invention drives, be to utilize said active filter circuit PFC, said high frequency chopping power output circuit A, said high frequency chopping power output circuit B, and other circuit bank becomes a full-bridge high-frequency Switching Power Supply.Switching frequency is 20KC to 100KC, and optimal selection is 30KC, and said high frequency chopping power output circuit A, said high frequency chopping power output circuit B can distinguish the said electric light source groups that drive simultaneously more than three groups or three groups.The power consumption of device of a kind of two-way of this patent output driving LED light source own is reduced to minimum, efficient can reach more than 90%, and the power supply average power consumption of said every group of electric light source group is reduced to 1.5W, and to have reached the purpose of energy saving economize on electricity be more than 60%.
The protection range of patent of the present invention is not limited to above-mentioned instantiation mode; The basic fundamental of the patent design according to the present invention; Those of ordinary skills need not through creative work, and the execution mode that can associate all belongs to the protection range of patent of the present invention.
Claims (10)
1. the device of the led light source that drives of two-way output.Comprise: EMC filter circuit, PFC active filter circuit, rectifier filter circuit, high frequency chopping power output circuit A, high frequency chopping power output circuit B; Also comprise current dividing circuit, resonant circuit, current stabilization circuit; Be connected in series with the led light source group in said current dividing circuit, resonant circuit, the current stabilization circuit, the led light source group is made up of two groups many LED coupled in series light sources.The mains supply input connects said EMC filter circuit; Said EMC filter circuit is exported to said PFC active filter circuit; Said PFC active filter circuit is exported to said rectifier filter circuit; The positive voltage output end of said rectifier filter circuit output is connected with the positive voltage input of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B respectively jointly; The negative voltage output of said rectifier filter circuit output is connected with the negative voltage input of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B respectively jointly; Said high frequency chopping power output circuit A is connected in parallel on said high frequency chopping power output circuit A more than three groups or three groups, the said current dividing circuit that is connected in series in the output loop, resonant circuit, current stabilization circuit, said led light source group provide electric power.Said high frequency chopping power output circuit B is connected in parallel on said high frequency chopping power output circuit B more than three groups or three groups, the said current dividing circuit that is connected in series in the output loop, resonant circuit, current stabilization circuit, said led light source group provide electric power.
2. the led light source device that a kind of two-way output according to claim 1 drives; It is characterized in that: said high frequency chopping power output circuit A, with said high frequency chopping power output circuit B, the alternating voltage of power output, the phase angle of electric current differ 180 degree.
3. the led light source device that a kind of two-way output according to claim 1 drives, it is characterized in that: said high frequency chopping power output circuit A, identical with the operating frequency of said high frequency chopping power output circuit B, operating frequency is 20KC.
4. the led light source device that a kind of two-way output according to claim 1 drives; It is characterized in that: said high frequency chopping power output circuit A, with said high frequency chopping power output circuit B; Be respectively and be connected in parallel on said high frequency chopping power output circuit A, said high frequency chopping power output circuit B more than three groups or three groups; The said current dividing circuit, resonant circuit, the current stabilization circuit that are connected in series in the output loop; Said led light source group provides said current dividing circuit, resonant circuit, the current stabilization circuit of electric power, and the line principle of said led light source group, connected mode, structure, parameter, performance are identical.
5. the led light source device that a kind of two-way output according to claim 1 drives; It is characterized in that: said high frequency chopping power output circuit A is connected in parallel on more than three groups or three groups in the output loop to form electric light source group A for it provides the said current dividing circuit that is connected in series, resonant circuit, the current stabilization circuit of electric power to be connected in series by inductance coil, resonant capacitance, said current dividing circuit and said led light source group, is connected with electrochemical capacitor between every group of said many LED coupled in series light source head end and the tail end in the led light source group described in the said electric light source group A.
6. the led light source device that a kind of two-way output according to claim 1 drives; It is characterized in that: said high frequency chopping power output circuit B be connected in parallel on more than three groups or three groups in the output loop for its said current dividing circuit that is connected in series, resonant circuit, current stabilization circuit that electric power is provided by inductance coil, resonant capacitance; Said current dividing circuit and said led light source group are connected in series and form electric light source group B, are connected with electrochemical capacitor between every group of said many LED coupled in series light source head end and the tail end in the led light source group described in the said electric light source group B.
7. the led light source device that drives according to claim 5,6 described a kind of two-way outputs; It is characterized in that: said current dividing circuit, resonant circuit, current stabilization circuit are by said inductance coil; Said resonant capacitance and said led light source group are formed series resonant circuit; Provide said led light source group required pulsating direct current electric power by said current dividing circuit; The time interval of said pulsating direct current is one to one, and frequency is the operating frequency of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B.
8. the led light source device that drives according to claim 1,5 or 6 described a kind of two-way outputs; It is characterized in that: by said high frequency chopping power output circuit A, said high frequency chopping power output circuit B; Respectively the said current dividing circuit, resonance phase-shift circuit, current stabilization circuit of power supply, consist of said electric light source group with said led light source group; The said electric light source group of many groups; Be connected in parallel in the output loop of said high frequency chopping power output circuit A, said high frequency chopping power output circuit B, press the different time interleaved power by said current dividing circuit.
9. the led light source device that drives according to claim 1,5,6,8 described a kind of two-way outputs; It is characterized in that: said current dividing circuit, resonance phase-shift circuit, current stabilization circuit, the said electric light source group that is composed in series with said led light source group, be connected in said high frequency chopping power output circuit A, said high frequency chopping power output circuit B in parallel output loop in; 3 groups to the 15 groups said electric light source groups that are connected in parallel in said high frequency chopping power output circuit A, the output loop, said high frequency chopping power output circuit B.3 groups to 15 groups said electric light source groups are connected in parallel in the output loop.
10. the led light source device that drives according to claim 1,5,6, described a kind of two-way output; It is characterized in that: said led light source group is connected with two groups of said many LED coupled in series light sources, is connected with opposite polarity said electrochemical capacitor between said two groups said many LED coupled in series light source head ends and the tail end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110164529 CN102843803A (en) | 2011-06-20 | 2011-06-20 | Device for driving LED (light emitting diode) light source by using duplex output |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110164529 CN102843803A (en) | 2011-06-20 | 2011-06-20 | Device for driving LED (light emitting diode) light source by using duplex output |
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| CN102843803A true CN102843803A (en) | 2012-12-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107094329A (en) * | 2017-05-03 | 2017-08-25 | 矽力杰半导体技术(杭州)有限公司 | Led drive circuit |
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2011
- 2011-06-20 CN CN 201110164529 patent/CN102843803A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107094329A (en) * | 2017-05-03 | 2017-08-25 | 矽力杰半导体技术(杭州)有限公司 | Led drive circuit |
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Application publication date: 20121226 |