CN104619085B - Ultralow ripple LED eye-protective lamps - Google Patents
Ultralow ripple LED eye-protective lamps Download PDFInfo
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- CN104619085B CN104619085B CN201510055539.1A CN201510055539A CN104619085B CN 104619085 B CN104619085 B CN 104619085B CN 201510055539 A CN201510055539 A CN 201510055539A CN 104619085 B CN104619085 B CN 104619085B
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Abstract
The invention discloses ultralow ripple LED eye-protective lamps, on the premise of LED drive power is not changed, with magnetic amplifier principle and Darlington stage linked method, the magnetic amplifying circuit and Darlington cascade circuit for offseting D.C. magnetic biasing are accessed between LED drive power and LED；LED eye-protective lamps of the invention realize reduction current ripples, purpose of the stabilization without stroboscopic and eye protection, and with low cost.
Description
Technical field
The invention belongs to LED technical field, and in particular to ultralow ripple LED eye-protective lamps.
Technical background
The incandescent lighting epoch, although light efficiency is low, every watt of only 15 lumens, but because tungsten filament has thermal inertia, work as alternating current
Source zero passage moment, red-hot tungsten filament also has little time cooling, so our eyes do not perceive 50 hertz of stroboscopics.
The fluorescent material of fluorescent lamp, there is twilight sunset, if the fluorescent material of " europium " containing rare earth (EU) element, there is longer twilight sunset, energy
The stroboscopic of 50 hz AC power supply zero passages is covered.
LED is that the swift light source of nanosecond, especially light efficiency are up to every watt of LED point light source of 300 lumens, ten intermuscular needling
Eye, is not only clearly visible 50 hertz of stroboscopics, or even also it appear that the shake of direct-current LED power supply ripple, it is easy to trigger visual fatigue！
Particularly nominal 18 watts of LED, is the common low price LED in market, there is obvious 100 hertz of stroboscopics, surveys LED electric current
Ripple can take the light flash that LED current ripple triggers more than 30 percent with digital camera.Although LED can
More than 95 percent electric power is saved than incandescent lamp, and the whole world legal stopping production stops pin incandescent lamp bulb, but people still prohibit not
Incandescent lamp is firmly cherished the memory of, just because facts have proved incandescent lamp than LED eye protection.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of current ripples, realization stabilization of reducing without stroboscopic, eye protection, cost
Low ultralow ripple LED eye-protective lamps.
The present invention adopts the following technical scheme that solution above-mentioned technical problem：
Ultralow ripple LED eye-protective lamps, AC power drives LED through LED drive power, LED drive power and LED it
Between also access magnetic amplifying circuit and Darlington cascade circuit for offseting D.C. magnetic biasing；
Magnetic amplifying circuit includes：Symmetrical winding emitter-base bandgap grading winding and base stage winding on magnet ring B, emitter-base bandgap grading winding include emitter-base bandgap grading winding
N11 and emitter-base bandgap grading winding N12, base stage winding includes base stage winding Nb1 and base stage winding Nb2；The output cathode end of LED drive power
The different name end of emitter-base bandgap grading winding N11 and the Same Name of Ends of emitter-base bandgap grading winding N12 are connected simultaneously, and the output negative pole end of LED drive power is passed through
The output cathode end of LED drive power is connected after electric capacity C1N；The emitter stage of the Same Name of Ends connecting triode T2 of emitter-base bandgap grading winding N11,
The emitter stage of the different name end connecting triode T5 of emitter-base bandgap grading winding N12；The base of the Same Name of Ends connecting triode T3 of base stage winding Nb1
Pole, the different name end of base stage winding Nb1 and the Same Name of Ends of base stage winding Nb2 are simultaneously by reconnecting the negative of LED after electric capacity C03
Pole, the base stage of the different name end connecting triode T6 of base stage winding Nb2；The output negative pole end of LED drive power connects the negative of LED
Pole；
Darlington cascade circuit includes：The base stage of the colelctor electrode connecting triode T1 of triode T2, base stage connecting triode
The colelctor electrode of T3；The emitter stage of the emitter stage connecting triode T1 of triode T3；The emitter stage connection LED of triode T1 is just
Pole, colelctor electrode connects the output cathode end of LED drive power；The base stage of the colelctor electrode connecting triode T4 of triode T5, base stage
The colelctor electrode of connecting triode T6；The emitter stage of the emitter stage connecting triode T4 of triode T6；The emitter stage of triode T4 connects
The positive pole of LED is connect, colelctor electrode connects the output cathode end of LED drive power；Between the base stage and emitter stage of triode T3 according to
Electric capacity Cb2 and electric capacity C02 is sequentially connected in series between the base stage and emitter stage of secondary series capacitance Cb1 and electric capacity C01, triode T6；LED
The negative pole of lamp is connected between electric capacity Cb1 and electric capacity C01, between electric capacity Cb2 and electric capacity C02；
The output cathode end of LED drive power is also by connecting different name end and the base of base stage winding Nb1 simultaneously after resistance NCT
The Same Name of Ends of pole winding Nb2, for soft start.
The magnet ring B uses magnetic conduction cold-rolled silicon steel tape magnet ring high, and 20 millimeters of external diameter, 14 millimeters of internal diameter is high 5 millimeters.
The turn ratio of emitter-base bandgap grading winding N11 and base stage winding Nb1 is 1：10；The number of turn of emitter-base bandgap grading winding N12 and base stage winding Nb2
Than being 1：10.
Emitter-base bandgap grading winding N11 and emitter-base bandgap grading winding N12 are with 0.27 millimeter of circle of silk-covered wire Double-wire parallel wound 10 of diameter；Base stage winding
Nb1 and base stage winding Nb2 are with the circle of 0.01 silk-covered wire Double-wire parallel wound of diameter 100.
The model of triode T1 and triode T4 is NPN type 8050；The model of triode T2 and triode T5 is PNP
Type 9015；The model of triode T3 and triode T6 is NPN type 9014；Electric capacity C01, electric capacity C02, electric capacity C03, electric capacity Cb1,
, using the solid capacitor of 25 volts of 1 microfarad, resistance NCT is the negative temperature coefficient resister of 10K for electric capacity Cb2 and electric capacity C1N.
The advantage of the invention is that：LED of the invention can realize ultralow current ripples, stablize without stroboscopic, eye protection, into
This is low.
Brief description of the drawings
Fig. 1 is the structural representation of ultralow ripple LED eye-protective lamps of the invention.
Specific embodiment
Specific embodiment of the invention is described in detail below, but does not constitute the limit to the scope of the present invention
System.
As shown in figure 1, ultralow ripple LED eye-protective lamps, through LED drive power driving LED, LED drives electric AC power
The magnetic amplifying circuit and Darlington cascade circuit for offseting D.C. magnetic biasing are also accessed between source and LED；
Magnetic amplifying circuit includes：Symmetrical winding emitter-base bandgap grading winding and base stage winding on magnet ring B, emitter-base bandgap grading winding include emitter-base bandgap grading winding
N11 and emitter-base bandgap grading winding N12, base stage winding includes base stage winding Nb1 and base stage winding Nb2；The output cathode end of LED drive power
The different name end of emitter-base bandgap grading winding N11 and the Same Name of Ends of emitter-base bandgap grading winding N12 are connected simultaneously, and the output negative pole end of LED drive power is passed through
The output cathode end of LED drive power is connected after electric capacity C1N；The emitter stage of the Same Name of Ends connecting triode T2 of emitter-base bandgap grading winding N11,
The emitter stage of the different name end connecting triode T5 of emitter-base bandgap grading winding N12；The base of the Same Name of Ends connecting triode T3 of base stage winding Nb1
Pole, the different name end of base stage winding Nb1 and the Same Name of Ends of base stage winding Nb2 are simultaneously by reconnecting the negative of LED after electric capacity C03
Pole, the base stage of the different name end connecting triode T6 of base stage winding Nb2；The output negative pole end of LED drive power connects the negative of LED
Pole；
Darlington cascade circuit includes：The base stage of the colelctor electrode connecting triode T1 of triode T2, base stage connecting triode
The colelctor electrode of T3；The emitter stage of the emitter stage connecting triode T1 of triode T3；The emitter stage connection LED of triode T1 is just
Pole, colelctor electrode connects the output cathode end of LED drive power；The base stage of the colelctor electrode connecting triode T4 of triode T5, base stage
The colelctor electrode of connecting triode T6；The emitter stage of the emitter stage connecting triode T4 of triode T6；The emitter stage of triode T4 connects
The positive pole of LED is connect, colelctor electrode connects the output cathode end of LED drive power；Between the base stage and emitter stage of triode T3 according to
Electric capacity Cb2 and electric capacity C02 is sequentially connected in series between the base stage and emitter stage of secondary series capacitance Cb1 and electric capacity C01, triode T6；LED
The negative pole of lamp is connected between electric capacity Cb1 and electric capacity C01, between electric capacity Cb2 and electric capacity C02；
The output cathode end of LED drive power is also by connecting different name end and the base of base stage winding Nb1 simultaneously after resistance NCT
The Same Name of Ends of pole winding Nb2, for soft start.
The magnet ring B uses magnetic conduction cold-rolled silicon steel tape magnet ring high, and 20 millimeters of external diameter, 14 millimeters of internal diameter is high 5 millimeters.
The turn ratio of emitter-base bandgap grading winding N11 and base stage winding Nb1 is 1：10；The number of turn of emitter-base bandgap grading winding N12 and base stage winding Nb2
Than being 1：10.
Emitter-base bandgap grading winding N11 and emitter-base bandgap grading winding N12 are with 0.27 millimeter of circle of silk-covered wire Double-wire parallel wound 10 of diameter；Base stage winding
Nb1 and base stage winding Nb2 are with the circle of 0.01 silk-covered wire Double-wire parallel wound of diameter 100.
For below 1A LED currents, the model of triode T1 and triode T4 is NPN type 8050；Triode T2 and three
The model of pole pipe T5 is positive-negative-positive 9015；The model of triode T3 and triode T6 is NPN type 9014；Electric capacity C01, electric capacity
, using the electric capacity of 25 volts of 1 microfarad, resistance NCT is the subzero temperature of 10K for C02, electric capacity C03, electric capacity Cb1, electric capacity Cb2 and electric capacity C1N
Degree coefficient resistance.For the LED current more than 1A, the model of triode T1 to triode T4 must be adapted to.
Magnetic amplifying circuit of the invention, using the magnet ring B of small size, D.C. magnetic biasing, winding has been offseted with symmetric winding
Exciting curent is only the power of ripple dynamic current very little.Wherein, emitter-base bandgap grading winding N11 and emitter-base bandgap grading winding N12 are to use diameter
0.27 millimeter of circle of silk-covered wire Double-wire parallel wound 10；Base stage winding Nb1 and base stage winding Nb2 are to use the silk-covered wire two-wire of diameter 0.01 simultaneously
Around 100 circles, make magnet ring B into the magnetic coupling device that amplification coefficient AO is 10 times.Magnet ring B and its emitter-base bandgap grading winding and base stage winding are to pure
Dc component transmission function is zero, without reaction；If the current amplification factor K1 of NPN type 9014, the Current amplifier of positive-negative-positive 9015
COEFFICIENT K 2, the current amplification factor K3 of NPN type 8050, then the ripple factor of LED drive power output end, amplifies by above-mentioned magnetic
After circuit and Darlington cascade circuit, LED load current ripples attenuation coefficient is one of (2 × AO × K1 × K2 × K3) part,
Realize so steadily stabilizing light source similar to battery lightening LED lamp.Resistance NCT plays soft start effect, resistance NCT cold-state resistances
It is 10K, when the 2 × Ibe of base current of two NPN types 9014 flows through resistance NCT, resistance NCT is depressured and is charged to electric capacity C03,
As the terminal voltage of electric capacity C03 is gradually increasing, LED realizes soft start, after resistance NCT heatings resistance value drop to 1K with
Under, LED electric current is stable at rated value.Adaptation resistance NCT can just finely tune LED electric current and consistently achieve rated value steady operation.
Claims (3)
1. ultralow ripple LED eye-protective lamps, AC power drives LED through LED drive power, it is characterised in that LED drive power
The magnetic amplifying circuit and Darlington cascade circuit for offsetting D.C. magnetic biasing are also accessed and LED between；
Magnetic amplifying circuit includes：Symmetrical winding emitter-base bandgap grading winding and base stage winding on magnet ring B, emitter-base bandgap grading winding include emitter-base bandgap grading winding N11
With emitter-base bandgap grading winding N12, base stage winding include base stage winding Nb1 and base stage winding Nb2；The output cathode end of LED drive power is same
When connection emitter-base bandgap grading winding N11 different name end and the Same Name of Ends of emitter-base bandgap grading winding N12, the output negative pole end of LED drive power is by electricity
The output cathode end of LED drive power is connected after appearance C1N；The emitter stage of the Same Name of Ends connecting triode T2 of emitter-base bandgap grading winding N11, penetrates
The emitter stage of the different name end connecting triode T5 of pole winding N12；The base stage of the Same Name of Ends connecting triode T3 of base stage winding Nb1,
The different name end of base stage winding Nb1 and the Same Name of Ends of base stage winding Nb2 are simultaneously by the negative pole of reconnection LED after electric capacity C03, base
The base stage of the different name end connecting triode T6 of pole winding Nb2；The output negative pole end of LED drive power connects the negative pole of LED；
Darlington cascade circuit includes：The base stage of the colelctor electrode connecting triode T1 of triode T2, base stage connecting triode T3's
Colelctor electrode；The emitter stage of the emitter stage connecting triode T1 of triode T3；The emitter stage of triode T1 connects the positive pole of LED,
Colelctor electrode connects the output cathode end of LED drive power；The base stage of the colelctor electrode connecting triode T4 of triode T5, base stage connection
The colelctor electrode of triode T6；The emitter stage of the emitter stage connecting triode T4 of triode T6；The emitter stage connection LED of triode T4
The positive pole of lamp, colelctor electrode connects the output cathode end of LED drive power；It is sequentially connected in series between the base stage and emitter stage of triode T3
Electric capacity Cb2 and electric capacity C02 is sequentially connected in series between the base stage and emitter stage of electric capacity Cb1 and electric capacity C01, triode T6；LED it is negative
Pole is connected between electric capacity Cb1 and electric capacity C01, between electric capacity Cb2 and electric capacity C02；
The output cathode end of LED drive power also by connected simultaneously after resistance NCT base stage winding Nb1 different name end and base stage around
The Same Name of Ends of group Nb2, for soft start.
2. ultralow ripple LED eye-protective lamps according to claim 1, it is characterised in that the magnet ring B is cold rolling using magnetic conduction high
Silicon strip magnet ring, 20 millimeters of external diameter, 14 millimeters of internal diameter is high 5 millimeters.
3. ultralow ripple LED eye-protective lamps according to claim 1, it is characterised in that emitter-base bandgap grading winding N11 and base stage winding
The turn ratio of Nb1 is 1：10；The turn ratio of emitter-base bandgap grading winding N12 and base stage winding Nb2 is 1：10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510055539.1A CN104619085B (en) | 2015-01-31 | 2015-01-31 | Ultralow ripple LED eye-protective lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510055539.1A CN104619085B (en) | 2015-01-31 | 2015-01-31 | Ultralow ripple LED eye-protective lamps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104619085A CN104619085A (en) | 2015-05-13 |
| CN104619085B true CN104619085B (en) | 2017-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510055539.1A Expired - Fee Related CN104619085B (en) | 2015-01-31 | 2015-01-31 | Ultralow ripple LED eye-protective lamps |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084331A (en) * | 1992-09-15 | 1994-03-23 | 陈广华 | Bridge rectifier and full-wave rectification converter ic |
| CN1462109A (en) * | 2001-03-16 | 2003-12-17 | 台达电子工业股份有限公司 | Auxiliary output voltage control realized using idirectional magnetization magnetic amplifier |
| CN101080126A (en) * | 2007-06-08 | 2007-11-28 | 灿瑞半导体(上海)有限公司 | High-power LED driving circuit |
| CN103066817A (en) * | 2012-12-24 | 2013-04-24 | 成都芯源系统有限公司 | Ripple refection circuit and power supply system and ripple refection method thereof |
-
2015
- 2015-01-31 CN CN201510055539.1A patent/CN104619085B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084331A (en) * | 1992-09-15 | 1994-03-23 | 陈广华 | Bridge rectifier and full-wave rectification converter ic |
| CN1462109A (en) * | 2001-03-16 | 2003-12-17 | 台达电子工业股份有限公司 | Auxiliary output voltage control realized using idirectional magnetization magnetic amplifier |
| CN101080126A (en) * | 2007-06-08 | 2007-11-28 | 灿瑞半导体(上海)有限公司 | High-power LED driving circuit |
| CN103066817A (en) * | 2012-12-24 | 2013-04-24 | 成都芯源系统有限公司 | Ripple refection circuit and power supply system and ripple refection method thereof |
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| Publication number | Publication date |
|---|---|
| CN104619085A (en) | 2015-05-13 |
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Granted publication date: 20170704 Termination date: 20180131 |