CN102367953A - Energy-saving light source - Google Patents
Energy-saving light source Download PDFInfo
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- CN102367953A CN102367953A CN201110261583XA CN201110261583A CN102367953A CN 102367953 A CN102367953 A CN 102367953A CN 201110261583X A CN201110261583X A CN 201110261583XA CN 201110261583 A CN201110261583 A CN 201110261583A CN 102367953 A CN102367953 A CN 102367953A
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Abstract
The invention relates to a light source, which comprises a pulse generator, LED, an inductance and diodes; the output end of the pulse generator is connected with anode of the LED, the cathode of the LED is connected with one end of the inductance, the other end of the inductance is connected with a ground wire of the pulse generator, the other end of the inductance is also connected with the anode of each diode, and the cathode of each diode is connected with the anode of the LED; and induced current generated by the inductance flows forwards by the LED. At a trailing edge of the pulse current, the induced current generated by the inductance enables the luminescence of the LED. The pulse current outputted by the pulse generator enables the luminescence of the LED, the inductance is used as a current limiting element of the LED, the inductance storages the energy of the pulse current, and at the trailing edge of the pulse current, the energy stored by the inductance is released to generate the induced current so as to facilitate the luminescence of the LED. The inductance is used to store the energy, so the energy conservation can be realized, and the inductance can be used as a new energy. The inductance is used as the current limiting element of the LED, so the heat loss of the current limiting element can be reduced, the energy can be saved, and the ambient temperature of the LED can be reduced.
Description
Technical field
Light source is meant led light source, and LED is meant Light-Emitting Diode (Light Emitting Diode), semiconductor light-emitting elements, semiconductor lamp, LED Lamp, LED Light, LED Tube Light, LED LightBulb, LED lamp, high-powered LED lamp, LED flashlight, LED car light, LED desk lamp, LED illuminating lamp, LED signal lamp, LED light fixture, LED marker, LED display, LED shiner.Various LED lamps are popularized rapidly.
When the two ends at LED apply forward voltage, when forward current was arranged through LED, LED was luminous.Forward current through LED is big more, then the luminous intensity of LED bigger (LED is bright more).Through the forward current of LED cannot the value of overstepping the extreme limit otherwise LED can damage.The luminous intensity of LED is relevant with the temperature of LED, and the more high meeting of the temperature of LED reduces the luminous intensity of LED.The temperature of LED is high more to cause the service life of LED short more.The forward current of LED of flowing through is big more, and then the temperature of LED is high more.The temperature of LED is low, and the forward current that then can increase LED improves the luminous intensity of LED.
Background technology
LED can damage when the forward current of LED or the direct impulse electric current value of overstepping the extreme limit.In the prior art; Use then current-limiting resistance of resistance conduct, the electric current of this current-limiting resistance of then flowing through changes into heat exhaustion and has fallen, according to formula P=IV; Promptly the power of this current-limiting resistance consumption equals electric current and takes advantage of voltage, and the power of this current-limiting resistance consumption has changed into heat and dissipated.
The luminous intensity of LED is relevant with the environment temperature of LED, and the service life of LED is also relevant with the LED environment temperature.LED can damage during environment temperature value of overstepping the extreme limit of LED.
The current-limiting resistance of LED has changed into heat with electric energy and has dissipated, and has consumed the energy, has increased the environment temperature of LED, and this all is a weak point of the prior art.
Summary of the invention
The present invention accomplishes in order to solve the aforementioned problems in the prior just, its objective is, and with the current limiting element of inductance as LED, the LED pulse current of the flowing through inductance of also flowing through, this pulse current makes inductive energy storage.When this pulse current began to disappear, promptly at the trailing edge of this pulse current, inductance discharged energy stored, and inductance produces induced electromotive force, and the induced current that inductance produces makes LED luminous.Can saves energy, energy savings provides a kind of new forms of energy.It is less not generate heat or generate heat as the current limiting element of LED with inductance, can reduce the temperature of LED lamp surrounding environment, can reduce thermal losses, can energy savings.
In order to solve above-mentioned task, the technical scheme that the present invention adopts is:
A kind of light source comprises: LED, inductance, diode; The negative pole of the cathode connecting diode of LED, the negative pole of LED connects an end of inductance, and the other end of inductance connects the positive pole of diode; Pulse current flow through LED and inductance; The induced current forward that inductance produces is through LED.
A kind of light source comprises: impulse generator, LED, inductance, diode; The output of impulse generator connects the positive pole of LED, and the negative pole of LED connects an end of inductance, and the other end of inductance connects the ground wire of impulse generator, and the other end of inductance also connects the positive pole of diode, and the negative pole of diode connects the positive pole of LED; The induced current forward that inductance produces is through LED.Said inductance can be self-induction type inductance or mutual inductance type inductance.The induced current that said inductance produces makes said LED luminous.The induced current that produces at the said inductance of the trailing edge of pulse current makes said LED luminous.Also comprise another diode, another diode is connected with said LED is equidirectional.
A kind of light source comprises: dc source, LED, inductance, diode, triode, impulse generator; The cathode output end of dc source connects the positive pole of LED, and the ground line output terminal of dc source connects ground wire, and the negative pole of LED connects an end of inductance; The other end of inductance connects the drain electrode of triode; The source ground of triode, the grid of triode connects the output of impulse generator, and the ground line output terminal of impulse generator connects ground wire; The other end of inductance also connects the positive pole of diode, and the negative pole of diode connects the positive pole of LED; The induced current forward that inductance produces is through LED.
A kind of light source comprises: dc source, triode, LED, inductance, diode, impulse generator; The cathode output end of dc source connects the source electrode of triode, and the ground line output terminal of dc source connects ground wire, and the drain electrode of triode connects the positive pole of LED; The negative pole of LED connects an end of inductance; The other end of inductance connects ground wire, and the other end of inductance also connects the positive pole of diode, and the negative pole of diode connects the positive pole of LED; The grid of triode connects the output of impulse generator, and the ground line output terminal of impulse generator connects ground wire; The induced current forward that inductance produces is through LED.
A kind of light source comprises: impulse generator, LED, inductance, another LED; The output of impulse generator connects the positive pole of LED, and the negative pole of LED connects an end of inductance, and an end of inductance also connects another LED negative pole, and the other end of inductance connects the ground wire of impulse generator, and it is anodal that the other end of inductance also connects another LED; The induced current forward that inductance produces is through another LED.The induced current that said inductance produces makes said another LED luminous.The induced current that produces at the said inductance of the trailing edge of pulse current makes said another LED luminous.
A kind of light source comprises: dc source, LED, inductance, another LED, triode, impulse generator; The cathode output end of dc source connects the positive pole of LED, and the ground line output terminal of dc source connects ground wire, and the negative pole of LED connects an end of inductance; One end of inductance also connects another LED negative pole; The other end of inductance connects the drain electrode of triode, the source ground of triode, and the grid of triode connects the output of impulse generator; The ground line output terminal of impulse generator connects ground wire, and it is anodal that the other end of inductance also connects another LED; The induced current forward that inductance produces is through another LED.
Description of drawings
Fig. 1 is the sketch map among embodiments of the invention 1 and the embodiment 2;
Fig. 2 is the sketch map in the embodiments of the invention 2;
Fig. 3 is the sketch map in the embodiments of the invention 3;
Fig. 4 is the sketch map in the embodiments of the invention 4;
Fig. 5 is the sketch map among embodiments of the invention 5 and the embodiment 6;
Fig. 6 is the sketch map in the embodiments of the invention 7;
Fig. 7 is the rectifying voltage regulator circuit diagram;
Fig. 8 is the sketch map of impulse waveform;
Fig. 9 is the circuit diagram of the impulse generator that connects into of NE555 integrated circuit;
Figure 10 is the circuit diagram of the impulse generator that connects into of not circuit.
The specific embodiment
Embodiments of the invention 1:
As shown in Figure 1, a kind of light source comprises: diode D2, LED, inductance L 1, diode D1.The negative pole of diode D2 connects the positive pole of LED, the negative pole of the cathode connecting diode D1 of LED, and the negative pole end of LED connects an end " 1 " of inductance L 1, and the other end of inductance " 2 " connects the positive pole of diode D1.
Among Fig. 1, pulse current Ip (during " 1 ") the diode D2 LED that flows through that flows through makes LED luminous, this pulse current Ip inductance L 1 of flowing through simultaneously, and this pulse current Ip makes inductance L 1 energy storage.When this pulse current begins to disappear; Promptly at the trailing edge of this pulse current Ip; Promptly this pulse current Ip goes to during " 1 " during " 0 "; Inductance L 1 discharges energy stored, and inductance L 1 produces induced electromotive force, and the induced current of inductance L 1 flows into 1 end of inductance L 1 from 2 ends of the inductance L 1 diode D1 LED that flows through that flows through; This induced current forward makes LED luminous through LED, and promptly this induced current is the forward current of LED.Utilize the induction reactance of inductance L 1 can current limliting.
Another diode and said LED be equidirectional to connect and is meant that diode D2 and LED are equidirectional and connects.
Diode D2 can be installed, with dashed lines short circuit diode D2 as shown in Figure 1, then, a kind of light source comprises: LED, inductance L 1, diode D1.The negative pole of the cathode connecting diode D1 of LED, the negative pole of LED connects an end " 1 " of inductance L 1, and the other end of inductance " 2 " connects the positive pole of diode D1; Pulse current Ip flow through LED and inductance L 1; The induced current that inductance L 1 produces is through LED; The induced current that inductance L 1 produces makes LED luminous.
Among Fig. 1, pulse current Ip flows into (with dashed lines short circuit diode D2) from the positive pole of LED, and pulse current Ip flows out from the other end " 2 " of inductance, shown in the direction of pulse current Ip among Fig. 1.
Among Fig. 1, pulse current Ip (during " 1 ") makes LED luminous when flowing through LED, this pulse current Ip inductance L 1 of flowing through simultaneously, and this pulse current Ip makes inductance L 1 energy storage.When this pulse current begins to disappear; Promptly at the trailing edge of this pulse current Ip; Promptly go to during " 1 " during " 0 "; Inductance L 1 discharges energy stored, and inductance L 1 produces induced electromotive force, and the induced current of inductance L 1 flows into 1 end of inductance L 1 from 2 ends of the inductance L 1 diode D1 LED that flows through that flows through; This induced current forward makes LED luminous through LED, and this induced current that inductance L 1 produces is the forward current of LED.Utilize the induction reactance of inductance L 1 can current limliting.
In the present embodiment (Fig. 1), pulse current Ip frequency is 40KHz; Inductance L 1 is 4.7uH.
The waveform of pulse current Ip is as shown in Figure 8, and expression has electric current (0.3A) during " 1 " of pulse, representes no current during " 0 " of pulse.According to the dutycycle of the luminous intensity regulating impulse of required LED (during the pulse " 1 " with " 0 " during ratio).The dutycycle (duty cycle) of available pulse width modulation (Pulse Width Modulated) regulating impulse.Pulse current Ip can be provided by the pulse output end Ps in Fig. 9 or Figure 10 circuit.
Embodiments of the invention 2:
In the present embodiment, light source is meant led light source.As shown in Figure 1, led light source comprises: shell is perhaps claimed the lampshade (not shown), power switch (not shown), impulse generator 300, LED, inductance L 1, diode D1, diode D2; The output Ps of impulse generator 300 connects the positive pole of diode D2; The negative pole of diode D2 connects the positive pole of LED; The negative pole end of LED connects an end " 1 " of inductance L 1; The other end of inductance L 1 " 2 " connects the ground wire of impulse generator 300, and the other end of inductance L 1 " 2 " also connects the positive pole of diode D1, and the negative pole of diode D1 connects the positive pole of LED.
Another diode and said LED be equidirectional to connect and is meant that diode D2 and LED are equidirectional and connects.
In Fig. 1, diode D2 can, i.e. short circuit diode D2 is shown in the dotted line at diode D2 two ends.If short circuit diode D2, then: led light source comprises: shell is perhaps claimed the lampshade (not shown), power switch (not shown), impulse generator 300, LED, inductance L 1, diode D1; The output Ps of impulse generator 300 connects the positive pole of LED; The negative pole end of LED connects an end " 1 " of inductance L 1; The other end of inductance L 1 " 2 " connects the ground wire of impulse generator 300; The other end of inductance L 1 " 2 " also connects the positive pole of diode D1, and the negative pole of diode D1 connects the positive pole of LED.
Inductance has the energy storage effect, and the induction reactance of inductance has metering function.Inductance is an inductive element, and when electric current process inductance, inductance does not consume actual power and do not consume actual electric energy.For example, with the load of inductance as electric energy meter, when alternating current process inductance, electric energy meter can not demonstrate inductance and consume electric energy.Because when vicissitudinous electric current passed through inductance, inductance was stored in the energy of the electric current of this variation in the inductance, inductance discharges energy stored again and returns power supply when this electric current begins to disappear.Inductance consumption be reactive power rather than actual power.That is to say that as load or can energy storage as current limiting element with inductance, inductance does not consume actual electric energy with inductance, inductance does not generate heat or generates heat less.Owing to as load or do not generate heat or generate heat less as current limiting element, can reduce the temperature of LED surrounding environment with inductance.Temperature around the reduction LED can prolong the life-span of LED.And the temperature around the LED is low, helps increasing the forward current of LED, helps increasing the luminous intensity of LED.
As shown in Figure 1; Pulse current (during " 1 ") in impulse generator 300 outputs; The pulse current (for example peak value 0.2A) of impulse generator 300 outputs makes LED luminous when flowing through LED; This pulse current inductance L 1 of flowing through simultaneously, this pulse current makes inductance L 1 energy storage, and inductance L 1 changes into magnetic field energy to electric energy and stores.When this pulse current begins to disappear; Promptly at the trailing edge of this pulse current; Promptly this pulse current goes to during " 1 " during " 0 ", and inductance L 1 discharges energy stored, and promptly inductance L 1 changes into electric energy to magnetic field energy; Inductance L 1 produces induced electromotive force; The induced current that inductance L 1 produces flows into the end " 1 " of inductance L 1 again from the other end " 2 " of the inductance L 1 diode D1 LED that flows through that flows through, and the induced current forward that inductance L 1 produces makes LED luminous through LED, and the induced current that inductance L 1 produces is the forward current of LED.The induced current that inductance L 1 produces makes LED luminous during " 0 " of the pulse current of impulse generator 300 outputs.
The induced current that inductance L 1 usefulness produces makes LED luminous, and the induced current that produces in the trailing edge inductance L 1 of pulse current makes LED luminous, can saves energy, and energy savings provides a kind of new forms of energy.
Utilize the induction reactance of inductance L 1 can current limliting, make the pulse current of the LED that flows through be no more than the limit pulse current parameter of LED.
If according to the conventional method, LED uses resistance as current-limiting resistance, and the electric current of this resistance of then flowing through changes into heat exhaustion and fallen, and according to formula P=IV, promptly the power of this resistance consumption equals electric current and takes advantage of voltage, has changed into heat.
Among Fig. 1, the effect of diode D1 is that the induced current forward that inductance L 1 is produced forms current loop through diode D1 forward through LED, makes LED luminous.
Among Fig. 1, the effect of diode D2 is that the induced current that stops inductance L 1 to produce flows to impulse generator 300.If have diode or unidirectional breakover element to isolate the induced current that inductance L 1 produces in the impulse generator 300, then diode D2 can not want.If the output of impulse generator 300 has other diode or unidirectional breakover element to isolate the induced current that inductance L 1 produces, then diode D2 can not want.
Among Fig. 1; The output Ps of impulse generator 300 can be the Ps end among Fig. 9; It also can be the Ps end among Figure 10; Can also be the pulse output end of astable multivibrator (Astable Multivibrator) CD4047, or the I/O mouth pulse signal output end of single-chip microcomputer (one-chip computer), or the pulse output end of crystal oscillator (CRYSTAL) circuit.
The impulse generator of various models or signal generator can both buy on market.
Among Fig. 1, the output Ps of impulse generator 300 can be the drain D of the triode Q1 among Fig. 4.
Diode D1 among Fig. 1 also can replace with triode, controls this triode conducting as required or ends.
Diode D1 among Fig. 1 also can replace with another LED, and diode D1 is not installed; The negative pole of this another LED connects an end " 1 " end of inductance L 1, and the positive pole of this another LED connects the other end " 2 " end of inductance L 1; The induced current that inductance L 1 produces makes this another LED luminous during " 0 " of the pulse current of impulse generator 300 outputs.As shown in Figure 5, this another LED is LED1.
The pulse frequency of impulse generator 300 outputs is 20KHz; Inductance L 1 is 15uH.
As shown in Figure 2, inductance L 1 is the self-induction type inductance, and the induced current of inductance L 1 flows into the end " 1 " of inductance L 1 again from the other end " 3 " of the inductance L 1 diode D1 LED that flows through that flows through; This induced current forward makes LED luminous through LED.The induced current that inductance L 1 produces makes that LED LED during " 0 " of the pulse current of impulse generator 300 outputs is luminous.
The positive pole that can perhaps connect the ground wire of the centre tap 2 connection impulse generators 300 of inductance L 1 diode D1 as required.
LED can be the series connection of a plurality of LED, or the parallel connection of a plurality of LED, and LED can be the series connection of LED and the combination of parallel connection.
Embodiments of the invention 3:
In the present embodiment, light source is meant the LED lamp.As shown in Figure 3, the LED lamp comprises: dc source 200, LED, inductance L 1, diode D1, diode D2, triode Q1, impulse generator 300, resistance R g.The cathode output end Dv of dc source 200 connects the positive pole of diode D2; The negative pole of diode D2 connects the positive terminal of LED, and the ground line output terminal of dc source 200 connects ground wire, and the negative pole end of LED connects an end " 1 " of inductance L 1; The other end of inductance " 2 " connects the drain D of triode Q1; The source S ground connection of triode Q1, the grid G of triode connects the output Ps of impulse generator 300, and the ground line output terminal of impulse generator 300 connects ground wire; The other end of inductance L 1 " 2 " also connects the positive pole of diode D1, and the negative pole of diode D1 connects the positive pole of LED; The induced current forward that inductance L 1 produces is through LED.
Another diode and said LED be equidirectional to connect and is meant that diode D2 and LED are equidirectional and connects.
In Fig. 3, if diode D2 (being short circuit diode D2) is not installed and resistance R g is not installed, then: the LED lamp comprises: dc source 200, LED, inductance L 1, diode D1, triode Q1, impulse generator 300; The cathode output end Dv of dc source 200 connects the positive pole of LED; The ground line output terminal of dc source 200 connects ground wire; The negative pole of LED connects an end " 1 " of inductance L 1, and the other end of inductance L 1 " 2 " connects the drain D of triode Q1, the source S ground connection of triode Q1; The grid G of triode Q1 connects the output Ps of impulse generator 300; The ground line output terminal of impulse generator connects ground wire, and the other end of inductance L 1 " 2 " also connects the positive pole of diode D1, and the negative pole of diode D1 connects the positive pole of LED; The induced current forward that inductance L 1 produces is through LED.
Among Fig. 3, triode Q1 is N channel field-effect triode MOSFET, also can use NPN type triode.Triode Q1 is used to amplify the power (amplified current or amplifying voltage) of the pulse signal of impulse generator 300 outputs, and the frequency of the pulse signal of triode Q1 output is identical with the frequency of the pulse signal that impulse generator 300 is exported.
Among Fig. 3, resistance R g is the below-center offset resistance of triode Q1.The output Dv output 6V voltage of dc source 200.
Among Fig. 3, the pulse voltage (or pulse current) of the output Ps of impulse generator 300 output is as shown in Figure 8.The pulse voltage of impulse generator 300 outputs makes triode Q1 be operated on off state, and making the electric current of flow through LED and the inductance L 1 and the series circuit of triode Q1 composition is pulse current.
Among Fig. 3; During " 1 " of the pulse current (or pulse voltage) that impulse generator 300 is exported (triode Q1 conducting); The pulse current of the triode Q1 output LED that flows through makes LED luminous; This pulse current inductance L 1 of flowing through simultaneously, this pulse current makes inductance L 1 energy storage, and inductance L 1 changes into magnetic field energy to electric energy and stores.When this pulse current begins to disappear; Promptly at the trailing edge of this pulse current; Being pulse current goes to during " 1 " during " 0 ", and inductance L 1 discharges energy stored, and promptly inductance L 1 changes into electric energy to magnetic field energy; Inductance L 1 produces induced electromotive force, and the induced current that inductance L 1 produces flows into 1 end of inductance L 1 from 2 ends of the inductance L 1 diode D1 LED that flows through that flows through; This induced current forward that inductance L 1 produces makes LED luminous through LED.The induced current that inductance L 1 produces (triode Q1 ends) during " 0 " of the pulse current (or pulse voltage) of impulse generator 300 outputs makes LED luminous.
Among Fig. 3, utilize the induction reactance of inductance L 1 can current limliting, make the pulse current of the LED that flows through be no more than the dispatch from the factory limiting value of specifications of LED.
In Fig. 3, it is short circuit diode D2 that diode D2 can be installed, if short circuit diode D2, then, the output Dv of dc source 200 directly connects the positive terminal of LED.
Among Fig. 3, diode D1 also can replace with another LED, and diode D1 is not installed; The negative pole of this another LED connects an end " 1 " end of inductance L 1, and the positive pole of this another LED connects the other end " 2 " end of inductance L 1; The induced current that inductance L 1 produces makes that this another LED is luminous.This another LED is LED1, and the connected mode of LED1 is as shown in Figure 6.
Embodiments of the invention 4:
Light source is meant led light source, also claims LED lamp.As shown in Figure 4, led light source is that the LED lamp comprises: dc source 200, diode D2, triode Q1, LED, inductance L 1, diode D1, impulse generator 300; The cathode output end Dv of dc source 200 connects the source S of triode Q1; The ground line output terminal of dc source 200 connects ground wire, and the drain D of triode Q1 connects the positive pole of diode D2, and the negative pole of diode D2 connects the positive pole of LED; The negative pole of LED connects an end " 1 " of inductance L 1; The other end of inductance L 1 " 2 " connects ground wire, and the other end of inductance L 1 " 2 " also connects the positive pole of diode D1, and the negative pole of diode D1 connects the positive pole of LED; The grid G of triode Q1 connects the output Ps of impulse generator 300, and the ground line output terminal of impulse generator 300 connects ground wire.
Another diode and said LED be equidirectional to connect and is meant that diode D2 and LED are equidirectional and connects.
The effect of diode D2 is that the induced current that stops inductance L 1 to produce flows to dc source 200.Because triode Q1 is unidirectional breakover element, so can not adorn diode D2 (being short circuit diode D2), then, the drain D of triode Q1 directly connects the positive pole of LED.
Among Fig. 4, triode Q1 is P-channel field-effect transistor (PEFT) triode MOSFET, also can use the positive-negative-positive triode.Triode Q1 is used to amplify the power (for example amplify pulse current or amplify pulse voltage) of the pulse signal of impulse generator 300 outputs, and the frequency of the pulse signal of triode Q1 output is identical with the frequency of the pulse signal that impulse generator 300 is exported.
Among Fig. 4, the pulse voltage (or pulse current) of the output Ps of impulse generator 300 output is as shown in Figure 8.The pulse voltage of impulse generator 300 outputs makes triode Q1 be operated on off state, and making the electric current of flow through LED and the inductance L 1 and the series circuit of triode Q1 composition is pulse current.
Among Fig. 4, during " 1 " of the pulse current of triode Q1 output (triode Q1 conducting), the pulse current of the triode Q1 output LED that flows through makes LED luminous, simultaneously this pulse current inductance L 1 of flowing through.When this pulse current begins to disappear; Promptly at the trailing edge of this pulse current; Promptly this pulse current goes to during " 1 " during " 0 "; Inductance L 1 produces induced electromotive force, and the induced current that inductance L 1 produces flows into 1 end of inductance L 1 from 2 ends of the inductance L 1 diode D1 LED that flows through that flows through, and this induced current forward makes LED luminous through LED; This induced current that inductance L 1 produces makes that LED (triode Q1 ends) LED during " 0 " of pulse current is luminous.Utilize the induction reactance of inductance L 1 can current limliting.
Among Fig. 4, can replace diode D1 (diode D1 is not installed) with another LED; The positive pole of this another LED connects inductance L 1 " 2 " end, and the negative pole of this another LED connects " 1 " end of inductance L 1; The induced current that inductance L 1 produces makes that this another LED is luminous; The method of attachment of this another LED can be with reference to the method for attachment of LED1 among figure 5 or Fig. 6.
Among Fig. 3 or among Fig. 4, dc source 200 can be: battery, rectifier power source, ac rectifying power source or Switching Power Supply rectifier power source.The module of various dc sources (comprising: rectifier power source, ac rectifying power source or Switching Power Supply rectifier power source) can buy in the electronic market.
For example, the dc source among Fig. 3 or among Fig. 4 200 can be an ac rectifying power source shown in Figure 7.As shown in Figure 7, frame of broken lines 200 is dc sources 200, " 220VAC " termination utility grid line; T1 is that power transformer is with 220V 50Hz alternating current step-down (for example being depressurized to 9V); Rectification circuit U1 is that bridge rectifier becomes direct current with AC rectification, and capacitor C 1 is a filter capacitor with C2, and regulator block U3 is circuit of three-terminal voltage-stabilizing integrated (for example 7806); Capacitor C 4 is a filter capacitor with C5, and output voltage Dv is 6V.
Fig. 9 is NE555, or the schematic diagram of MC1555 pulse free-running circuit, OUTPUT end (being the Ps end) voltage pulse output and pulse current, and OUTPUT end (being the Ps end) is exactly the output Ps of impulse generator 300 among Fig. 3 or Fig. 4.Pulse signal output end Ps among Fig. 9 is exactly the output Ps of impulse generator 300 among Fig. 1.Among Fig. 9, the output pulse frequency of NE555 or MC1555 is f=1.44/ ((Ra+Rb) C).This is a prior art, on a lot of publications the technical application data is arranged all.Regulate the dutycycle that the ratio of Ra and Rb can regulating impulse, the dutycycle of regulating impulse can be regulated the luminous intensity (brightness) of LED.
Figure 10 is the pulse free oscillation device that connects into six not gates (Hex Inverter) CD4069 or 74HC04; Pulse signal output end Ps can voltage pulse output and pulse current, and the pulse signal output end Ps among Figure 10 is exactly the output Ps of impulse generator 300 among Fig. 3 or Fig. 4.Pulse signal output end Ps among Figure 10 is exactly the output Ps of impulse generator 300 among Fig. 1.The frequency of the product decision pulse of resistance R t and capacitor C t is regulated the pulse frequency that resistance R t or control capacittance Ct can regulate output.
Utilizing the I/O mouth output pulse signal of single-chip microcomputer or microprocessor is prior art, and introduction is all arranged in the books of Fundamentals of Mono-Chip Computers & Applications; As long as with the level of this I/O mouth put height, time-delay, with level zero clearing, the time-delay of this I/O mouth, repeating this four instructions just can be at this I/O mouth voltage pulse output and pulsed current signal.
Embodiments of the invention 5:
As shown in Figure 5, a kind of light source comprises: LED, inductance L 1, LED1 (being another LED).Pulse current Ip flows into from the positive pole of LED, and the negative pole end of LED connects an end " 1 " of inductance L 1, and the other end of inductance " 2 " connects the positive pole of LED1, and the negative pole of LED1 connects an end " 1 " of inductance L 1, and pulse current Ip flows out from the other end " 2 " of inductance.Shown in the direction of Ip among Fig. 5.The induced current forward that inductance produces is through LED1.
LED1 among Fig. 5 is another LED described in claims.
Among Fig. 5, pulse current Ip (during " the 1 ") LED that flows through makes LED luminous, this pulse current Ip inductance L 1 of flowing through simultaneously, and this pulse current Ip makes inductance L 1 energy storage.When this pulse current begins to disappear; Promptly at the trailing edge of this pulse current Ip; Promptly this pulse current goes to during " 1 " during " 0 "; Inductance L 1 discharges energy stored, and inductance L 1 produces induced electromotive force, and the induced current that inductance L 1 produces flows into 1 end of inductance L 1 again from 2 ends of inductance L 1 LED1 that flows through; This induced current forward makes LED1 luminous through LED1, i.e. this induced current of inductance L 1 generation is the forward current of LED1.
In the present embodiment (Fig. 5), the frequency of pulse current Ip is 20KHz; Inductance L 1 is 15uH.Inductance L 1 can be self-induction type inductance or mutual inductance type inductance, and using self-induction type inductance or mutual inductance type inductance to replace inductance L 1 is the replacement of equivalent technologies.Inductance is also referred to as coil.
Embodiments of the invention 6:
Light source is meant led light source.As shown in Figure 5, led light source comprises: impulse generator 300, LED, inductance L 1, LED1 (being another LED).The output Ps of impulse generator 300 connects the positive pole of LED; The negative pole end of LED connects an end " 1 " of inductance L 1; One end " 1 " of inductance L 1 also connects the negative pole of LED1; The other end of inductance L 1 " 2 " connects the ground wire of impulse generator 300, and the other end of inductance L 1 " 2 " also connects the positive pole of LED1.
Fig. 5, impulse generator 300 voltage pulse outputs (or pulse current) waveform is as shown in Figure 8, representes no-voltage (or no current) during " 0 ", and expression has voltage (or no current) during " 1 ".Pulse voltage (voltage during 1) is 6V.
As shown in Figure 5, the pulse current (during " 1 ") of impulse generator 300 output makes LED luminous when flowing through LED, this pulse current inductance L 1 of flowing through simultaneously, and this pulse current makes inductance L 1 energy storage, and inductance L 1 changes into magnetic field energy to electric energy and stores.When this pulse current begins to disappear; Promptly at the trailing edge of this pulse current; Promptly this pulse current goes to during " 1 " during " 0 ", and inductance L 1 discharges energy stored, and promptly inductance L 1 changes into electric energy to magnetic field energy; Inductance L 1 produces induced electromotive force, and the induced current of inductance L 1 flows into the end " 1 " of inductance L 1 again from the other end " 2 " of inductance L 1 LED1 that flows through; This induced current forward makes LED1 luminous through LED1, and induced current is the forward current of LED1.The induced current that inductance L 1 produces makes that LED1 LED1 during " 0 " of the pulse current of impulse generator 300 outputs is luminous.The induced current that inductance L 1 produces makes LED1 luminous.The induced current that produces in the trailing edge inductance L of pulse current 1 makes LED1 luminous.
One of the end series connection of LED1 that also can be in Fig. 5 stops reversing the current to pass through LED1 with the equidirectional diode of LED1 (D3)." another diode is connected with said LED is equidirectional " is meant that diode (D3) connects with LED1 is equidirectional.(D3) is not shown for diode.
Embodiments of the invention 7:
Light source is meant the LED lamp.As shown in Figure 6, the LED lamp comprises: dc source 200, LED, inductance L 1, LED1 (being another LED), triode Q1, impulse generator 300.The cathode output end Dv of dc source 200 connects the positive pole of LED; The ground line output terminal of dc source 200 connects ground wire; The negative pole of LED connects an end " 1 " of inductance L 1, and an end " 1 " of inductance L 1 also connects the negative pole of LED1, and the other end of inductance " 2 " connects the drain D of triode Q1; The source S ground connection of triode Q1; The grid G of triode connects the output Ps of impulse generator 300, and the ground line output terminal of impulse generator 300 connects ground wire, and the other end of inductance L 1 " 2 " also connects the positive pole of LED1.
Among Fig. 6, resistance R g is the biasing resistor of triode Q1, also resistance R g can be installed.The end of resistance R g connects the grid G of triode Q1, and the other end of resistance R g connects the source S of triode Q1.
Among Fig. 6, triode Q1 is N channel field-effect triode MOSFET, also can use NPN type triode.The output Dv output 6V voltage of dc source 200.
Among Fig. 6, the pulse voltage (or pulse current) of the output Ps of impulse generator 300 output is as shown in Figure 8.The pulse voltage (or pulse current) of impulse generator 300 outputs makes triode Q1 be operated on off state, and making the electric current of flow through LED and the inductance L 1 and the series circuit of triode Q1 composition is pulse current.
Among Fig. 6, during " 1 " of the pulse current (or pulse voltage) of impulse generator 300 output (triode Q1 conducting), the pulse current of the triode Q1 output LED that flows through makes LED luminous, simultaneously this pulse current inductance L 1 of flowing through; When this pulse current begins to disappear; Promptly at the trailing edge of this pulse current; Promptly this pulse current goes to during " 1 " during " 0 ", and inductance L 1 produces induced electromotive force, and the induced current that inductance L 1 produces flows into the end " 1 " of inductance L 1 again from the other end " 2 " of inductance L 1 LED1 that flows through; This induced current forward that inductance L 1 produces makes LED1 luminous through LED1, and this induced current that inductance L 1 produces is the forward current of LED1; The induced current that inductance L 1 produces (triode Q1 ends) during " 0 " of the pulse current of impulse generator 300 outputs makes LED1 luminous.
One of the end series connection of LED1 that also can be in Fig. 6 stops reversing the current to pass through LED1 with the equidirectional diode of LED1 (D3)." another diode is connected with said LED is equidirectional " is meant that diode (D3) connects with LED1 is equidirectional.(D3) is not shown for diode.
LED1 among Fig. 6 is another LED described in claims.
Claims (10)
1. light source comprises: LED, and inductance, diode is characterized in that, the negative pole of the cathode connecting diode of LED, the negative pole of LED connects an end of inductance, and the other end of inductance connects the positive pole of diode; Pulse current flow through LED and inductance; The induced current forward that inductance produces is through LED.
2. a light source comprises: impulse generator, LED; Inductance, diode is characterized in that; The output of impulse generator connects the positive pole of LED, and the negative pole of LED connects an end of inductance, and the other end of inductance connects the ground wire of impulse generator; The other end of inductance also connects the positive pole of diode, and the negative pole of diode connects the positive pole of LED; The induced current forward that inductance produces is through LED.
3. light source as claimed in claim 2 is characterized in that, said inductance can be self-induction type inductance or mutual inductance type inductance.
4. light source as claimed in claim 2 is characterized in that, the induced current that produces at the said inductance of the trailing edge of pulse current makes said LED luminous.
5. light source as claimed in claim 2 is characterized in that, also comprises another diode, and another diode is connected with said LED is equidirectional.
6. a light source comprises: dc source, LED, inductance; Diode, triode, impulse generator is characterized in that; The cathode output end of dc source connects the positive pole of LED, and the ground line output terminal of dc source connects ground wire, and the negative pole of LED connects an end of inductance; The other end of inductance connects the drain electrode of triode, the source ground of triode, and the grid of triode connects the output of impulse generator; The ground line output terminal of impulse generator connects ground wire, and the other end of inductance also connects the positive pole of diode, and the negative pole of diode connects the positive pole of LED; The induced current forward that inductance produces is through LED.
7. a light source comprises: dc source, triode, LED; Inductance, diode, impulse generator is characterized in that; The cathode output end of dc source connects the source electrode of triode, and the ground line output terminal of dc source connects ground wire, and the drain electrode of triode connects the positive pole of LED; The negative pole of LED connects an end of inductance, and the other end of inductance connects ground wire, and the other end of inductance also connects the positive pole of diode; The negative pole of diode connects the positive pole of LED, and the grid of triode connects the output of impulse generator, and the ground line output terminal of impulse generator connects ground wire; The induced current forward that inductance produces is through LED.
8. a light source comprises: impulse generator, LED; Inductance, another LED is characterized in that; The output of impulse generator connects the positive pole of LED, and the negative pole of LED connects an end of inductance, and an end of inductance also connects another LED negative pole; The other end of inductance connects the ground wire of impulse generator, and it is anodal that the other end of inductance also connects another LED; The induced current forward that inductance produces is through another LED.
9. light source as claimed in claim 8 is characterized in that, the induced current that produces at the said inductance of the trailing edge of pulse current makes said another LED luminous.
10. a light source comprises: dc source, LED, inductance; Another LED, triode, impulse generator is characterized in that; The cathode output end of dc source connects the positive pole of LED, and the ground line output terminal of dc source connects ground wire, and the negative pole of LED connects an end of inductance; One end of inductance also connects another LED negative pole, and the other end of inductance connects the drain electrode of triode, the source ground of triode; The grid of triode connects the output of impulse generator, and the ground line output terminal of impulse generator connects ground wire, and it is anodal that the other end of inductance also connects another LED; The induced current forward that inductance produces is through another LED.
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| CN201110261583XA CN102367953A (en) | 2011-08-28 | 2011-08-28 | Energy-saving light source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102970810A (en) * | 2012-11-28 | 2013-03-13 | 南充市天元节能科技有限公司 | High-frequency electrodeless lamp integrated drive circuit |
| CN108156696A (en) * | 2017-12-16 | 2018-06-12 | 南宁学院 | A kind of magnetic coupling based on quartzy frequency stabilization multivibrator is wireless night-light circuit |
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| JPS6053090A (en) * | 1983-09-02 | 1985-03-26 | Mayumi Watanabe | Lighting system for led |
| CN1984518A (en) * | 2005-09-16 | 2007-06-20 | Nec照明株式会社 | Low-voltage power supply circuit for illumination, and low-voltage power supply output method and illumination device |
| CN101005722A (en) * | 2006-01-20 | 2007-07-25 | 松下电器产业株式会社 | Light emitting diode drive apparatus |
| CN101730344A (en) * | 2008-10-31 | 2010-06-09 | 三洋电机株式会社 | Driver circuit of light-emitting element |
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| JPS6053090A (en) * | 1983-09-02 | 1985-03-26 | Mayumi Watanabe | Lighting system for led |
| CN1984518A (en) * | 2005-09-16 | 2007-06-20 | Nec照明株式会社 | Low-voltage power supply circuit for illumination, and low-voltage power supply output method and illumination device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102970810A (en) * | 2012-11-28 | 2013-03-13 | 南充市天元节能科技有限公司 | High-frequency electrodeless lamp integrated drive circuit |
| CN108156696A (en) * | 2017-12-16 | 2018-06-12 | 南宁学院 | A kind of magnetic coupling based on quartzy frequency stabilization multivibrator is wireless night-light circuit |
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Application publication date: 20120307 |