CN104661402B - A kind of LED module as light source of illumination device - Google Patents
A kind of LED module as light source of illumination device Download PDFInfo
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- CN104661402B CN104661402B CN201410809046.8A CN201410809046A CN104661402B CN 104661402 B CN104661402 B CN 104661402B CN 201410809046 A CN201410809046 A CN 201410809046A CN 104661402 B CN104661402 B CN 104661402B
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Abstract
The invention discloses a kind of LED module as light source of illumination device, LED module includes drive circuit, drive circuit includes the first diode, second diode, 3rd diode, 4th diode, 5th diode, 6th diode, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, drive circuit further includes overvoltage protection branch road, the outfan of drive circuit is connected to the input of overvoltage protection branch road, overvoltage protection branch road includes first resistor, second resistance, 3rd resistor, 4th resistance, 5th resistance, first Zener diode, second Zener diode, NPN triode and fet.Using the present invention, the stability of output voltage can be improved, lifting the luminous efficiency of LED module.
Description
The present invention is that 201310037178.9, original application day is on 01 31st, 2013, former denomination of invention for original applying number
To drive the divisional application of the AC rectification circuit and AC rectification method of LED module.
Technical field
The present invention relates to field of LED illumination, more particularly to a kind of LED module as light source of illumination device.
Background technology
Light emitting diode (LED, Light Emitting Diode) module as a kind of new light sources of high benefit, due to tool
Have the advantages that life-span length, energy consumption be low, energy-conserving and environment-protective, be widely used in business, industry, the illumination of family field.
When LED module is used as light source of illumination device, the life-span of illuminator depends not only on the luminescent properties of LED,
Additionally depend on the stability of the drive circuit assembly that LED module running voltage is provided.In current application scheme, LED module
The bottleneck in life-span remains the voltage stability of drive circuit offer.In order to reduce the undulatory property of driving voltage to LED module
Aging effects, need based on existing wide variety of alternating current, design brand-new AC rectification circuit, stable to provide
Driving voltage, so as to drive LED module.
Bridge rectifier connects into simple rectification circuit using semiconductor rectifier diode (or claiming diode), extensively
It is applied in the voltage stabilizing application of various AC-DC conversion, by bridge rectifier, alternating current (AC) is rectified into into unidirectional current
(DC), relatively stable voltage can be provided for LED module, so as to lift the service life of LED module.
Fig. 1 is the existing AC rectification electrical block diagram for driving LED module.LED module is connected to into alternating current
The DC output end of rectification circuit, by the AC rectification circuit, carries out rectification to alternating current, can directly drive LED moulds
Block, referring to Fig. 1, the AC rectification circuit is bridge rectifier, including：AC module (AC), the first diode D1,
Two diode D2, the 3rd diode D3 and the 4th diode D4, wherein,
The positive pole of the first diode D1 is connected with the negative pole of the second diode D2, and negative pole is negative with the 3rd diode D3 respectively
The input (V+) of pole and external LED module is connected；
The positive pole of the second diode D2 outfan (V-) respectively with the positive pole and external LED module of the 4th diode D4
It is connected；
The positive pole of the 3rd diode D3 is connected with the negative pole of the 4th diode D4；
One end (A1) of AC module is connected with the positive pole of the first diode D1, the other end (A2) and the second diode D2
Positive pole be connected.
The cycle of alternating current includes：Positive half period and negative half-cycle, wherein, positive half period is that alternating current rises from null value
The time period of null value experience is dropped to positive peak value and from positive peak value；It is negative that negative half-cycle is that alternating current is dropped to from null value
Peak value and from negative peak value rise to null value experience time period.
In the positive half period of alternating current, the alternating current of AC module output passes through the first diode D1, external LED module
And the 4th diode D4, current loop is formed, and running voltage is provided for external LED module；
In the negative half period device of alternating current, the alternating current of AC module output passes through the 3rd diode D3, external LED module
And the second diode D2, another current loop is formed, and running voltage is provided for external LED module.
From above-mentioned, the existing AC rectification circuit for driving LED module, alternating current after the rectification of diode,
Direct drive LED module work, as alternating current is cyclic fluctuation, and there is certain cut-in voltage in LED module, i.e., only
When having the voltage for being carried in LED module two ends to exceed cut-in voltage, LED module can just be turned on and be lighted；If being carried in LED moulds
The voltage at block two ends is not above cut-in voltage, and LED module is in cut-off state, i.e., in non-light emitting state.Thus, it is existing
AC rectification circuit, when current loop occurs to turn to, using the teaching of the invention it is possible to provide be less than cut-in voltage to the voltage of external LED module,
So that the luminous efficiency of LED module is relatively low；Further, in AC rectification circuit diode rectification, export to LED
The magnitude of voltage of module fluctuates with AC voltage fluctuations, and output voltage stability is relatively low so that significantly dodging occurs in LED module
Bright phenomenon, reduces the service life of LED module.
The Chinese patent application of Publication No. CN101329044A discloses a kind of luminous units of LED of integrated drive electronics
Part, including one end of at least one LED chip is connected with the drive output of drive circuit, by LED chip, drive circuit and
Package main body is integrally packaged, and makes the LED light-emitting component of integrated drive electronics, and the pin of LED light-emitting component is at least part of
In embedded package main body.
The Chinese patent application of Publication No. CN102368881A discloses a kind of constant-current driving system for applying to LED
System, including voltage doubling rectifing circuit and constant-current control circuit, mono- lc circuit of input Jing of voltage doubling rectifing circuit and direct current input
Voltage or AC-input voltage are connected, and lc circuit includes inductance L and electric capacity C1, the other end and voltage doubling rectifing circuit of inductance L
First input end is connected, and electric capacity C1 is connected in parallel between the first input end of voltage doubling rectifing circuit and the second input, voltage multiplying rectifier
The outfan of circuit is connected with the input of constant-current control circuit, and voltage doubling rectifing circuit includes electric capacity C2, electric capacity C3, electrochemical capacitor
C4 and diode D1, diode D2, diode D3, diode D4.
The operation principle of documents is when the input of system is by AC-powered, by voltage doubling rectifing circuit to input
Power supply is optimized regulation, by the charging in voltage doubling rectifing circuit to electric capacity, realizing voltage-doubler rectification through several cycles
And lift the stability of supply voltage, realize the compatibility that AC and DC is powered, with considerably less components and parts to be input into power supply carry out it is excellent
Change and adjust, by the input of LC resonance circuit efficient matchings electronic transformers, the input of the efficient being matched with electronic transformer of energy.
Documents are disadvantageous in that when input current direction changes, can not reach as input voltage is relatively low
To the conducting voltage needed for LED module, prevent LED module from turning on, reduction luminous efficiency is low, obvious scintillation occurs.
The drive circuit of the alternating current direct drive LED module of the present invention can increase the ON time of LED module, reduce
The scintillation of LED, there is provided with the diverse technical scheme of above-mentioned documents.Above-mentioned documents are useless to disclose this
The bright technical scheme that LED shorting advances are made by positive and negative half cycle feed leg, those skilled in the art are public according to documents
The technical characteristic opened do not allow to be readily conceivable that the present invention " angle of flow of conducting LED component is increased by positive and negative half cycle feed leg,
There is no technical enlightenment, the present invention and contrast text to the present invention in improving luminous efficiency and power utilization rate ", above-mentioned documents
It is non-obvious that part is compared.
The Chinese patent application of Publication No. CN 202385328U, discloses a kind of AC LED lighting lamp capacitor transforming short
Road protection circuit, the short-circuit protection circuit flow through the electric current of LED modules for detection, when output short-circuit or electric current are more than setting
During threshold value, current supply circuit is disconnected；The present invention overvoltage crowbar be used for detect that rectification module is supplied to the voltage of LED module,
When threshold value of the voltage more than setting, current supply circuit is disconnected, the technological means that documents are adopted with protection circuit of the present invention are not
Together, there is no technical enlightenment to the present invention.
The content of the invention
Embodiments of the invention provide a kind of AC rectification circuit for driving LED module, improve stablizing for output voltage
Property, lifted LED module luminous efficiency.
Embodiments of the invention also provide a kind of AC rectification method for driving LED module, improve the steady of output voltage
Luminous efficiency that is qualitative, lifting LED module.
To reach above-mentioned purpose, a kind of AC rectification circuit for driving LED module provided in an embodiment of the present invention, the friendship
Stream electric rectification circuit includes：AC module, positive half cycle rectification branch road, positive half cycle feed leg, negative half period rectification branch road, negative half
All feed legs and overvoltage protection branch road, wherein,
Positive half cycle rectification branch road, for when AC module is in positive half cycle, the alternating current to AC module output
Rectification is carried out, the voltage signal after rectification is exported LED module to overvoltage protection branch road and outside respectively；
Positive half cycle feed leg, for when AC module is in negative half period, according to the exchange of AC module output
Electricity is charged；When AC module is in positive half cycle, discharged, the voltage signal of electric discharge is exported respectively to overvoltage guarantor
Shield branch road and the LED module of outside；
Negative half period rectification branch road, for AC module be in negative half period when, to AC module output alternating current
Rectification is carried out, the voltage signal after rectification is exported LED module to overvoltage protection branch road and outside respectively；
Negative half period feed leg, for when AC module is in positive half cycle, according to the exchange of AC module output
Electricity is charged；When AC module is in negative half period, discharged, the voltage signal of electric discharge is exported respectively to overvoltage guarantor
Shield branch road and the LED module of outside；
Overvoltage protection branch road, for when the voltage signal of input is higher than the voltage threshold for pre-setting, turning off external LED
The electric pathway of module.
It is preferred that the positive half cycle rectification branch road includes：First rectifier tube, the second rectifier tube and the 6th rectifier tube, its
In,
The positive pole of the second rectifier tube is connected with one end of AC module, and negative pole is connected with the positive pole of the first rectifier tube；
The negative pole of the first rectifier tube is connected with the input of external LED module；
The positive pole of the 6th rectifier tube is connected with the outfan of external LED module, the other end phase of negative pole and AC module
Even.
It is preferred that the negative half period rectification branch road includes：3rd rectifier tube, the 4th rectifier tube and the 5th rectifier tube, its
In,
The negative pole of the 3rd rectifier tube is connected with one end of AC module, and positive pole is connected with the outfan of external LED module；
The positive pole of the 5th rectifier tube is connected with the other end of AC module, and negative pole is connected with the positive pole of the 4th rectifier tube；
The negative pole of the 4th rectifier tube is connected with the input of external LED module.
It is preferred that the positive half cycle feed leg includes：First electric capacity and the 4th electric capacity, wherein,
One end of first electric capacity is connected with the positive pole of the 4th diode, and the other end is connected with one end of AC module；
One end of 4th electric capacity is connected with the other end of AC module, the outfan phase of the other end and external LED module
Even.
It is preferred that the negative half period feed leg includes：Second electric capacity and the 3rd electric capacity, wherein,
One end of second electric capacity is connected with one end of AC module, and the other end is connected with the outfan of external LED module；
One end of 3rd electric capacity is connected with the positive pole of the first rectifier tube, and the other end is connected with the other end of AC module.
It is preferred that the overvoltage protection branch road includes：First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th
Resistance, the first Zener diode, the second Zener diode, NPN triode and fet, wherein,
One end of first resistor is connected with one end of the 4th resistance and the input of LED module respectively, other end difference
One end, the negative pole of the first Zener diode and one end of 3rd resistor with second resistance is connected；
The other end of 3rd resistor is connected with the base stage of NPN triode；
The other end of the 4th resistance colelctor electrode respectively with NPN triode, one end of the 5th resistance and the second voltage stabilizing two
The negative pole of pole pipe is connected；
The other end of the 5th resistance is connected with the grid of fet；
The drain electrode of fet is connected with the outfan of LED module；
The source electrode of the fet other end respectively with second resistance, the positive pole of the first Zener diode, tri- poles of NPN
The positive pole of the emitter stage of pipe, the positive pole of the second Zener diode and the 3rd diode is connected.
It is preferred that the rectifier tube is diode, audion or silicon controlled rectifier (SCR).
It is preferred that first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity adopt polarity free capacitor.
It is preferred that first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity have identical capacitance.
It is preferred that
In alternating current positive half period, the second diodes of electric current Jing, the first diode, LED module, the 6th diode are formed back
Road, powers to LED module, and the voltage signal of rectification is exported to overvoltage protection branch road, electricity of the overvoltage protection branch road according to input
Pressure signal and the voltage threshold for pre-setting, it is determined whether the electric pathway of shut-off LED module, wherein,
In alternating current voltage ascent stage, alternating current passes through the second diode and the 3rd electric capacity forms loop, is the 3rd
Electric capacity charges；Meanwhile, alternating current passes through the second electric capacity and the 6th diode forms loop, is that the second electric capacity charges；Meanwhile, the
Four electric capacity, the first electric capacity, the 4th diode and LED module form loop, are that LED module is powered；
In alternating current negative half-cycle, the 5th diodes of electric current Jing, the 4th diode, LED module, the 3rd diode are formed back
Road, powers to LED module, and the voltage signal of rectification is exported to overvoltage protection branch road, electricity of the overvoltage protection branch road according to input
Pressure signal and the voltage threshold for pre-setting, it is determined whether the electric pathway of shut-off LED module, wherein,
In absolute value of voltage ascent stage, the alternating current in AC module passes through the 5th diode and the first electric capacity shape
Into loop, charge to the first electric capacity；Meanwhile, alternating current passes through the 4th electric capacity and the 3rd diode forms loop, electric to the 4th
Capacity charge；Meanwhile, the second electric capacity, the 3rd electric capacity, the first diode and LED module form loop, are that LED module is powered.
It is preferred that the AC rectification circuit is further included：Current regulator diode, the positive pole of the current regulator diode with
The source electrode of fet is connected, and negative pole is connected with the positive pole of the 3rd diode.
It is preferred that the AC rectification circuit is further included：Electrochemical capacitor, the positive pole and LED of the electrochemical capacitor
The input of module is connected, and negative pole is connected with the outfan of LED module.
A kind of AC rectification method of driven for emitting lights diode (LED) module, by AC rectification drives luminous two
Pole pipe LED module, the AC rectification circuit include：It is AC module, positive half cycle rectification branch road, positive half cycle feed leg, negative
Half cycle rectification branch road, negative half period feed leg and overvoltage protection branch road, the method include：
When AC module is in positive half cycle, positive half cycle rectification branch road carries out whole to the alternating current that AC module is exported
Stream, the voltage signal after rectification is exported LED module to overvoltage protection branch road and outside respectively；
Negative half period feed leg is charged according to the alternating current that AC module is exported, and positive half cycle feed leg is put
Electricity, the voltage signal of electric discharge is exported LED module to overvoltage protection branch road and outside respectively；
Overvoltage protection branch road turns off external LED module when the voltage signal of input is higher than the voltage threshold for pre-setting
Electric pathway；
When AC module is in negative half period, negative half period rectification branch road carries out whole to the alternating current that AC module is exported
Stream, the voltage signal after rectification is exported LED module to overvoltage protection branch road and outside respectively；
Negative half period feed leg is discharged, and the voltage signal of electric discharge is exported respectively to overvoltage protection branch road and outside
LED module, positive half cycle feed leg is charged according to the alternating current that AC module is exported；
Overvoltage protection branch road turns off external LED module when the voltage signal of input is higher than the voltage threshold for pre-setting
Electric pathway.
Wherein, the positive half cycle rectification branch road includes：First rectifier tube, the second rectifier tube and the 6th rectifier tube, wherein,
The positive pole of the second rectifier tube is connected with one end of AC module, and negative pole is connected with the positive pole of the first rectifier tube；
The negative pole of the first rectifier tube is connected with the input of external LED module；
The positive pole of the 6th rectifier tube is connected with the outfan of external LED module, the other end phase of negative pole and AC module
Even.
Wherein, the negative half period rectification branch road includes：3rd rectifier tube, the 4th rectifier tube and the 5th rectifier tube, wherein,
The negative pole of the 3rd rectifier tube is connected with one end of AC module, and positive pole is connected with the outfan of external LED module；
The positive pole of the 5th rectifier tube is connected with the other end of AC module, and negative pole is connected with the positive pole of the 4th rectifier tube；
The negative pole of the 4th rectifier tube is connected with the input of external LED module.
Wherein, the positive half cycle feed leg includes：First electric capacity and the 4th electric capacity, wherein,
One end of first electric capacity is connected with the positive pole of the 4th diode, and the other end is connected with one end of AC module；
One end of 4th electric capacity is connected with the other end of AC module, the outfan phase of the other end and external LED module
Even.
Wherein, the negative half period feed leg includes：Second electric capacity and the 3rd electric capacity, wherein,
One end of second electric capacity is connected with one end of AC module, and the other end is connected with the outfan of external LED module；
One end of 3rd electric capacity is connected with the positive pole of the first rectifier tube, and the other end is connected with the other end of AC module.
Wherein, the overvoltage protection branch road includes：It is first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th electric
Resistance, the first Zener diode, the second Zener diode, NPN triode and fet, wherein,
One end of first resistor is connected with one end of the 4th resistance and the input of LED module respectively, other end difference
One end, the negative pole of the first Zener diode and one end of 3rd resistor with second resistance is connected；
The other end of 3rd resistor is connected with the base stage of NPN triode；
The other end of the 4th resistance colelctor electrode respectively with NPN triode, one end of the 5th resistance and the second voltage stabilizing two
The negative pole of pole pipe is connected；
The other end of the 5th resistance is connected with the grid of fet；
The drain electrode of fet is connected with the outfan of LED module；
The source electrode of the fet other end respectively with second resistance, the positive pole of the first Zener diode, tri- poles of NPN
The positive pole of the emitter stage of pipe, the positive pole of the second Zener diode and the 3rd diode is connected.
Wherein, in alternating current positive half period, the second diodes of electric current Jing, the first diode, LED module, the 6th diode
Loop is formed, is powered to LED module, and the voltage signal of rectification is exported to overvoltage protection branch road, overvoltage protection branch road is according to defeated
The voltage signal for entering and the voltage threshold for pre-setting, it is determined whether the electric pathway of shut-off LED module, wherein,
In alternating current voltage ascent stage, alternating current passes through the second diode and the 3rd electric capacity forms loop, is the 3rd
Electric capacity charges；Meanwhile, alternating current passes through the second electric capacity and the 6th diode forms loop, is that the second electric capacity charges；Meanwhile, the
Four electric capacity, the first electric capacity, the 4th diode and LED module form loop, are that LED module is powered；
In alternating current negative half-cycle, the 5th diodes of electric current Jing, the 4th diode, LED module, the 3rd diode are formed back
Road, powers to LED module, and the voltage signal of rectification is exported to overvoltage protection branch road, electricity of the overvoltage protection branch road according to input
Pressure signal and the voltage threshold for pre-setting, it is determined whether the electric pathway of shut-off LED module, wherein,
In absolute value of voltage ascent stage, the alternating current in AC module passes through the 5th diode and the first electric capacity shape
Into loop, charge to the first electric capacity；Meanwhile, alternating current passes through the 4th electric capacity and the 3rd diode forms loop, electric to the 4th
Capacity charge；Meanwhile, the second electric capacity, the 3rd electric capacity, the first diode and LED module form loop, are that LED module is powered.
As seen from the above technical solution, a kind of AC rectification circuit for driving LED module provided in an embodiment of the present invention
And AC rectification method, including：AC module, positive half cycle rectification branch road, positive half cycle feed leg, negative half period rectification branch road
And negative half period feed leg, wherein, positive half cycle rectification branch road, for when AC module is in positive half cycle, to alternating current
The alternating current of module output carries out rectification, and the voltage signal after rectification is exported respectively to overvoltage protection branch road and outside
LED module；Positive half cycle feed leg, for when AC module is in negative half period, according to the exchange of AC module output
Electricity is charged；When AC module is in positive half cycle, discharged, the voltage signal of electric discharge is exported respectively to overvoltage guarantor
Shield branch road and the LED module of outside；Negative half period rectification branch road, for when AC module is in negative half period, to alternating current
The alternating current of module output carries out rectification, and the voltage signal after rectification is exported respectively to overvoltage protection branch road and outside
LED module；Negative half period feed leg, for when AC module is in positive half cycle, according to the exchange of AC module output
Electricity is charged；When AC module is in negative half period, discharged, the voltage signal of electric discharge is exported respectively to overvoltage guarantor
Shield branch road and the LED module of outside；Overvoltage protection branch road, for the voltage signal in input higher than the voltage threshold that pre-sets
During value, the electric pathway of external LED module is turned off.So, using the charge and discharge of electric capacity, LED is directly driven in existing alternating current
The stability of output voltage on the circuit base of module, is improve, the utilization rate of each half period of alternating current is improve, is increased
The ON time of LED, while reducing LED luminous fluctuations, and ensure that higher power factor, improve sending out for LED module
Light efficiency.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described.It should be evident that the accompanying drawing in following description is only this
Some embodiments of invention, for those of ordinary skills, can be being obtained according to these accompanying drawing illustrated embodiments
Other embodiments and its accompanying drawing.
Fig. 1 is the existing AC rectification electrical block diagram for driving LED module.
Fig. 2 is the AC rectification electrical block diagram that the embodiment of the present invention drives LED module.
Fig. 3 is the AC rectification circuit concrete structure schematic diagram that the embodiment of the present invention drives LED module.
Fig. 4 is another concrete structure schematic diagram of AC rectification circuit that the embodiment of the present invention drives LED module.
Fig. 5 is the another concrete structure schematic diagram of AC rectification circuit that the embodiment of the present invention drives LED module.
Fig. 6 is the AC rectification method flow schematic diagram that the embodiment of the present invention drives LED module.
Specific embodiment
Clear, complete description is carried out to the technical scheme of various embodiments of the present invention below with reference to accompanying drawing, it is clear that retouched
The embodiment stated a part of embodiment only of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention,
The resulting all other embodiment on the premise of creative work is not made of those of ordinary skill in the art, belongs to this
The protected scope of invention.
The existing AC rectification circuit for driving LED module, as alternating current is cyclic fluctuation, and LED module is deposited
In certain cut-in voltage, thus, when current loop occurs to turn to, using the teaching of the invention it is possible to provide be less than to the voltage of external LED module and open
Open voltage so that the luminous efficiency of LED module is relatively low；Further, in AC rectification circuit diode rectification, it is defeated
Go out to the magnitude of voltage of LED module and fluctuate with AC voltage fluctuations, output voltage stability is relatively low, affect making for LED module
Use the life-span.
In the embodiment of the present invention, for the shortcoming of prior art alternating current direct driving circuit, there is provided a kind of alternating current direct
The drive circuit for driving LED module is connect, and driving current is provided for LED module, i.e., is increased conducting using the charge and discharge of electric capacity
Angle, and the trough filling of alternating current is got up, power-efficient is improved, LED light-emitting flash phenomenons are reduced.
Fig. 2 is the AC rectification electrical block diagram that the embodiment of the present invention drives LED module.Referring to Fig. 2, the exchange
Electric rectification circuit includes：AC module, positive half cycle rectification branch road, positive half cycle feed leg, negative half period rectification branch road, negative half period
Feed leg and overvoltage protection branch road, wherein,
Positive half cycle rectification branch road, for when AC module is in positive half cycle, the alternating current to AC module output
Rectification is carried out, the voltage signal after rectification is exported LED module to overvoltage protection branch road and outside respectively；
Positive half cycle feed leg, for when AC module is in negative half period, according to the exchange of AC module output
Electricity is charged；For when AC module is in positive half cycle, being discharged, the voltage signal of electric discharge being exported respectively to mistake
Pressure protection branch road and the LED module of outside；
Negative half period rectification branch road, for AC module be in negative half period when, to AC module output alternating current
Rectification is carried out, the voltage signal after rectification is exported LED module to overvoltage protection branch road and outside respectively；
Negative half period feed leg, for when AC module is in positive half cycle, according to the exchange of AC module output
Electricity is charged；For when AC module is in negative half period, being discharged, the voltage signal of electric discharge being exported respectively to mistake
Pressure protection branch road and the LED module of outside；
Overvoltage protection branch road, for when the voltage signal of input is higher than the voltage threshold for pre-setting, turning off external LED
The electric pathway of module.
In the embodiment of the present invention, outside LED module can also be other load blocks, and for example, other are needed stable
Load under running voltage.
Wherein, positive half cycle rectification branch road includes：First rectifier tube D1, the second rectifier tube D2 and the 6th rectifier tube D6 (figures
Not shown in), wherein,
The positive pole of the second rectifier tube D2 is connected with one end (A1) of AC module, the positive pole of negative pole and the first rectifier tube D1
It is connected；
The negative pole of the first rectifier tube D1 is connected with the input of external LED module；
The positive pole of the 6th rectifier tube D6 is connected with the outfan of external LED module, the other end of negative pole and AC module
(A2) it is connected.
Negative half period rectification branch road includes：3rd rectifier tube D3, the 4th rectifier tube D4 and the 5th rectifier tube D5 (do not show in figure
Go out), wherein,
The negative pole of the 3rd rectifier tube D3 is connected with one end (A1) of AC module, the output of positive pole and external LED module
End is connected；
The positive pole of the 5th rectifier tube D5 is connected with the other end (A2) of AC module, and negative pole and the 4th rectifier tube D4 are just
Extremely it is connected；
The negative pole of the 4th rectifier tube D4 is connected with the input of external LED module.
Positive half cycle feed leg includes：First electric capacity C1 and the 4th electric capacity C4 (not shown)s, wherein,
One end of first electric capacity C1 is connected with the positive pole of the 4th diode D4, one end (A1) of the other end and AC module
It is connected；
One end of 4th electric capacity C4 is connected with the other end (A2) of AC module, and the other end is defeated with external LED module
Go out end to be connected.
Negative half period feed leg includes：Second electric capacity C2 and the 3rd electric capacity C3 (not shown)s, wherein,
One end of second electric capacity C2 is connected with one end (A1) of AC module, the output of the other end and external LED module
End is connected；
One end of 3rd electric capacity C3 is connected with the positive pole of the first rectifier tube D1, the other end of the other end and AC module
(A2) it is connected.
Overvoltage protection branch road includes：First resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the first Zener diode DZ1, the second Zener diode DZ2, NPN triode Q1 and fet M1 (do not show in figure
Go out), wherein,
One end of first resistor R1 is connected with one end of the 4th resistance R4 and the input of LED module respectively, the other end
One end respectively with second resistance R2, the negative pole of the first Zener diode DZ1 and one end of 3rd resistor R3 are connected；
The other end of 3rd resistor R3 is connected with the base stage of NPN triode Q1；
The other end of the 4th resistance R4 colelctor electrode respectively with NPN triode Q1, one end and second of the 5th resistance R5
The negative pole of Zener diode DZ2 is connected；
The other end of the 5th resistance R5 is connected with the grid of fet M1；
The drain electrode of fet M1 is connected with the outfan of LED module；
The source electrode of the fet M1 other end respectively with second resistance R2, the positive pole of the first Zener diode DZ1,
The positive pole of the emitter stage of NPN triode Q1, the positive pole of the second Zener diode DZ2 and the 3rd diode D3 is connected.
In the embodiment of the present invention, by first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the first Zener diode DZ1, the second Zener diode DZ2, NPN triode Q1 and fet M1 composition overvoltage
Protection circuit, when the voltage of input is higher than the voltage threshold for pre-setting, turns off the electric pathway of external LED module, that is, turns off
Fet M1, chopping current, so as to effective protection LED module and whole circuit are without damage, substantially increase electricity
The reliability on road.
In practical application, voltage threshold can be arranged according to actual needs, by arranging first resistor R1 and second resistance
The resistance of R2, is determined by first resistor R1, second resistance R2 partial pressure.
It is preferred that rectifier tube can be diode, or audion, as long as the device with unilateal conduction characteristic
, for example, silicon controlled rectifier (SCR) etc..It is it is preferred that adopt semiconductor rectifier diode, not only with low cost, and be easy to
LED module etc. carries out Two-level ensemble, the LED light device of being integrally formed alternating current direct drive.
Below so that rectifier tube is as diode as an example, the embodiment of the present invention is described in detail.
Fig. 3 is the AC rectification circuit concrete structure schematic diagram that the embodiment of the present invention drives LED module.Referring to Fig. 3, should
The AC rectification circuit of LED module is driven to include：First diode D1, the second diode D2, the 3rd diode D3, the four or two
Pole pipe D4, the 5th diode D5, the 6th diode D6, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4,
LED module, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first Zener diode
DZ1, the second Zener diode DZ2, NPN triode Q1 and fet M1, wherein,
The positive pole of the second diode D2 is connected with one end (A1) of AC module (AC), negative pole respectively with the first diode
One end of the positive pole of D1 and the 3rd electric capacity C3 is connected；
The negative pole of the first diode D1 input (V+) phase respectively with the negative pole and LED module of the 4th diode D4
Even；
The other end of the 3rd electric capacity C3 is connected with the other end (A2) of alternating current；
The positive pole of the 4th diode D4 is connected with one end of the negative pole and the first electric capacity C1 of the 5th diode D5 respectively；
The other end of the first electric capacity C1 is connected with one end of alternating current；
The positive pole of the 5th diode D5 negative pole respectively with the 6th diode D6, one end of the 4th electric capacity C4 and alternating current
The other end be connected；
The negative pole of the 3rd diode D3 is connected with one end of the second electric capacity C2 and one end of alternating current respectively；
It is the outfan (V-) of LED module positive pole respectively with the 3rd diode D3, the other end of the second electric capacity C2, the 4th electric
Hold the other end of C4, the positive pole of the 6th diode D6 to be connected；
One end of first resistor R1 is connected with one end of the 4th resistance R4 and the input of LED module respectively, the other end
One end respectively with second resistance R2, the negative pole of the first Zener diode DZ1 and one end of 3rd resistor R3 are connected；
The other end of 3rd resistor R3 is connected with the base stage of NPN triode Q1；
The other end of the 4th resistance R4 colelctor electrode respectively with NPN triode Q1, one end and second of the 5th resistance R5
The negative pole of Zener diode DZ2 is connected；
The other end of the 5th resistance R5 is connected with the grid of fet M1；
The drain electrode of fet M1 is connected with the outfan of LED module；
The source electrode of the fet M1 other end respectively with second resistance R2, the positive pole of the first Zener diode DZ1,
The positive pole of the emitter stage of NPN triode Q1, the positive pole of the second Zener diode DZ2 and the 3rd diode D3 is connected.
In the embodiment of the present invention, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 are operated in exchange
State, needs to bear backward voltage, it is preferred that the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 are adopted
With polarity free capacitor, to adapt to alternate current operation environment.The ac voltage withstanding value of polarity free capacitor should be greater than or defeated at least equal to exchanging
Enter magnitude of voltage.
Preferably, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 have same or like electricity
Capacitance.
The operation principle of embodiment of the present invention circuit is described below：
In alternating current positive half period, electric current Jing the second diode D2, the first diode D1, LED module, the 6th diode D6
Loop is formed, is powered to LED module, and the voltage signal of rectification is exported to overvoltage protection branch road, overvoltage protection branch road is according to defeated
The voltage signal for entering and the voltage threshold for pre-setting, it is determined whether the electric pathway of shut-off LED module.Wherein,
In alternating current voltage ascent stage, alternating current passes through the second diode D2 and the 3rd electric capacity C3 and forms loop, is
3rd electric capacity C3 charges；Meanwhile, alternating current passes through the second electric capacity C2 and the 6th diode D6 and forms loop, is the second electric capacity C2
Charge；Meanwhile, the 4th electric capacity C4, the first electric capacity C1, the 4th diode D4 and LED module form loop, are that LED module is supplied
The electric charge stored in electricity, i.e. the first electric capacity C1 and the 4th electric capacity C4, through the 4th diode D4, discharges to LED module, so as to
Running voltage is provided for LED module.
In the embodiment of the present invention, in alternating current voltage ascent stage, the second electric capacity C2, the 3rd electric capacity C3 are on circuit structure
For parallel relationship；First electric capacity C1, the 4th electric capacity C4 on circuit structure with AC module be series relationship, be LED module
Power supply, equivalent to when AC module is initially powered or switches positive and negative half period, increases the voltage of alternating current, makes LED moulds
Block can shorting advance, so as to lift the quality factor of circuit, and improve the stability of output voltage, improve LED module
Luminous efficiency, also improve the service life of LED module.
In alternating current negative half-cycle, the 5th diode D5 of electric current Jing, the 4th diode D4, LED module, the 3rd diode D3
Loop is formed, is powered to LED module, and the voltage signal of rectification is exported to overvoltage protection branch road, overvoltage protection branch road is according to defeated
The voltage signal for entering and the voltage threshold for pre-setting, it is determined whether the electric pathway of shut-off LED module.Wherein,
In absolute value of voltage ascent stage, the alternating current in AC module passes through the 5th diode D5 and the first electric capacity
C1 forms loop, charges to the first electric capacity C1；Meanwhile, alternating current is formed back by the 4th electric capacity C4 and the 3rd diode D3
Road, charges to the 4th electric capacity C4；Meanwhile, the second electric capacity C2, the 3rd electric capacity C3, the first diode D1 and LED module are formed back
Road, is that LED module is powered, i.e., the electric charge for storing in the second electric capacity C2, the 3rd electric capacity C3, by the first diode D 1, to LED
Module discharge, so as to provide running voltage for LED module.
In the embodiment of the present invention, in the charging process of absolute value of voltage ascent stage, the first electric capacity C1, the 4th electric capacity C4
It is parallel relationship on circuit structure；Second electric capacity C2, the 3rd electric capacity C3 are on circuit structure with AC module to connect pass
System, equivalent to when alternating current switches, increases the absolute value of voltage of alternating current, enables LED module shorting advance.
In the embodiment of the present invention, handed over by the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4
The electric positive half period of stream and the alternate discharge and recharge of alternating current negative half-cycle so that export relatively stable to the magnitude of voltage of LED module,
Reduce flicker frequency when LED module lights；Meanwhile, increased LED module negative in alternating current positive half period and alternating current
ON time in half period, reduces the luminous fluctuations of LED module, and improves the power factor of circuit.Further, originally
The circuit structure of inventive embodiments is succinct, and power-efficient is high, is highly suitable for the illumination of the LED module of alternating current direct drive
Device.
In practical application, in order to ensure will not to differ too big in alternating current positive and negative half period output current, in Fig. 2 and Fig. 3,
The equivalent resistance of each branch road should be same or like, i.e., the diode parameters in each branch road should be same or like, and each electric capacity also should
When with same or like capacitance, for example, the diode parameters in positive half cycle rectification branch road should be with negative half period rectification branch road
In diode parameters it is same or like；Capacitance in positive half cycle feed leg should be with the capacitance in negative half period feed leg
It is same or like.
In the embodiment of the present invention, the same or like electric capacity of selection parameter, for improving, electric balance is beneficial, equally has
Beneficial to balanced load, reduce flicker and raising power-efficient.In the embodiment of the present invention, the discharge and recharge for mainly using electric capacity is special
Property, thus, electric capacity (capacitance) parameter is most important parameter, the electric capacity for selecting electric capacity same or like, and charge-discharge characteristic is just
Can substantially reach same or like.
It is preferred that the stability in order to further improve the voltage signal exported to LED module, the drive of the embodiment of the present invention
The AC rectification circuit of dynamic LED module further includes current regulator diode (CRD, Current Regulative Diode).
Fig. 4 is another concrete structure schematic diagram of AC rectification circuit that the embodiment of the present invention drives LED module.Referring to figure
4, and unlike Fig. 3, further include current regulator diode (CRD, Current Regulative Diode), the positive pole of CRD
It is connected with the source electrode of fet M1, negative pole is connected with the positive pole of the 3rd diode D3.So, by DC loop
Increasing a current regulator diode is used for current limliting so that the luminous efficiency of LED module has very big lifting.
In figure 3, although the embodiment of the present invention can solve the problem that the fluctuation problem of LED module light output to a certain extent,
But degree is filled up to alternating current trough less, at alternating voltage trough, LED module light output only has light output at crest
30%～40%.
Thus, a kind of preferred version of the invention is provided, as shown in Figure 5.
Fig. 5 is the another concrete structure schematic diagram of AC rectification circuit that the embodiment of the present invention drives LED module.Referring to figure
5, from unlike Fig. 4, on the basis of the basic circuit of the present invention, an electrochemical capacitor C5 is increased as filter capacitor, electrolysis
The positive pole of electric capacity C5 is connected with the input of LED module, and negative pole is connected with the positive pole of the 6th diode D6.So, due to electrolysis
The filter function of electric capacity C5, makes the current waveform of inflow LED module more smooth, although sacrifice some power factors, but
Light output of the LED module at alternating voltage trough, when can reach crest, more than the 80% of light output, does not almost have on sense organ
Difference.
Fig. 6 is the AC rectification method flow schematic diagram that the embodiment of the present invention drives LED module.Referring to Fig. 6, by exchanging
Electric rectification drives LED module, the AC rectification circuit include：AC module, positive half cycle rectification
Road, positive half cycle feed leg, negative half period rectification branch road, negative half period feed leg and overvoltage protection branch road, the method include：
Step 601, when AC module is in positive half cycle, the exchange that positive half cycle rectification branch road is exported to AC module
Electricity carries out rectification, and the voltage signal after rectification is exported LED module to overvoltage protection branch road and outside respectively；
In this step, positive half cycle rectification branch road includes：First rectifier tube, the second rectifier tube and the 6th rectifier tube, wherein,
The positive pole of the second rectifier tube is connected with one end of AC module, and negative pole is connected with the positive pole of the first rectifier tube；
The negative pole of the first rectifier tube is connected with the input of external LED module；
The positive pole of the 6th rectifier tube is connected with the outfan of external LED module, the other end phase of negative pole and AC module
Even.
Overvoltage protection branch road includes：It is first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, first steady
Pressure diode, the second Zener diode, NPN triode and fet, wherein,
One end of first resistor is connected with one end of the 4th resistance and the input of LED module respectively, other end difference
One end, the negative pole of the first Zener diode and one end of 3rd resistor with second resistance is connected；
The other end of 3rd resistor is connected with the base stage of NPN triode；
The other end of the 4th resistance colelctor electrode respectively with NPN triode, one end of the 5th resistance and the second voltage stabilizing two
The negative pole of pole pipe is connected；
The other end of the 5th resistance is connected with the grid of fet；
The drain electrode of fet is connected with the outfan of LED module；
The source electrode of the fet other end respectively with second resistance, the positive pole of the first Zener diode, tri- poles of NPN
The positive pole of the emitter stage of pipe, the positive pole of the second Zener diode and the 3rd diode is connected.
Step 602, negative half period feed leg are charged according to the alternating current that AC module is exported, positive half cycle feed
Road is discharged, and the voltage signal of electric discharge is exported LED module to overvoltage protection branch road and outside respectively；
In this step, negative half period feed leg includes：Second electric capacity and the 3rd electric capacity, wherein,
One end of second electric capacity is connected with one end of AC module, and the other end is connected with the outfan of external LED module；
One end of 3rd electric capacity is connected with the positive pole of the first rectifier tube, and the other end is connected with the other end of AC module.
Positive half cycle feed leg includes：First electric capacity and the 4th electric capacity, wherein,
One end of first electric capacity is connected with the positive pole of the 4th diode, and the other end is connected with one end of AC module；
One end of 4th electric capacity is connected with the other end of AC module, the outfan phase of the other end and external LED module
Even.
Step 603, when the voltage signal of input is higher than the voltage threshold for pre-setting, shut-off is outside for overvoltage protection branch road
The electric pathway of LED module；
Step 604, when AC module is in negative half period, the exchange that negative half period rectification branch road is exported to AC module
Electricity carries out rectification, and the voltage signal after rectification is exported LED module to overvoltage protection branch road and outside respectively；
In this step, negative half period rectification branch road includes：3rd rectifier tube, the 4th rectifier tube and the 5th rectifier tube, wherein,
The negative pole of the 3rd rectifier tube is connected with one end of AC module, and positive pole is connected with the outfan of external LED module；
The positive pole of the 5th rectifier tube is connected with the other end of AC module, and negative pole is connected with the positive pole of the 4th rectifier tube；
The negative pole of the 4th rectifier tube is connected with the input of external LED module.
Step 605, negative half period feed leg are discharged, and the voltage signal of electric discharge is exported respectively to overvoltage protection branch road
And the LED module of outside, positive half cycle feed leg is charged according to the alternating current that AC module is exported；
Step 606, when the voltage signal of input is higher than the voltage threshold for pre-setting, shut-off is outside for overvoltage protection branch road
The electric pathway of LED module.
So, in the embodiment of the present invention, in alternating current positive half period, the second diodes of electric current Jing, the first diode, LED
Module, the 6th diode form loop, power to LED module, and the voltage signal of rectification is exported to overvoltage protection branch road, overvoltage
Voltage signal and the voltage threshold that pre-set of the protection branch road according to input, it is determined whether the electric pathway of shut-off LED module,
Wherein,
In alternating current voltage ascent stage, alternating current passes through the second diode and the 3rd electric capacity forms loop, is the 3rd
Electric capacity charges；Meanwhile, alternating current passes through the second electric capacity and the 6th diode forms loop, is that the second electric capacity charges；Meanwhile, the
Four electric capacity, the first electric capacity, the 4th diode and LED module form loop, are that LED module is powered；
In alternating current negative half-cycle, the 5th diodes of electric current Jing, the 4th diode, LED module, the 3rd diode are formed back
Road, powers to LED module, and the voltage signal of rectification is exported to overvoltage protection branch road, electricity of the overvoltage protection branch road according to input
Pressure signal and the voltage threshold for pre-setting, it is determined whether the electric pathway of shut-off LED module, wherein,
In absolute value of voltage ascent stage, the alternating current in AC module passes through the 5th diode and the first electric capacity shape
Into loop, charge to the first electric capacity；Meanwhile, alternating current passes through the 4th electric capacity and the 3rd diode forms loop, electric to the 4th
Capacity charge；Meanwhile, the second electric capacity, the 3rd electric capacity, the first diode and LED module form loop, are that LED module is powered.
Obviously, those skilled in the art can carry out the spirit of various changes and modification without deviating from the present invention to the present invention
And scope.So, if these modifications and modification to the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also comprising these changes and modification.
Claims (9)
1. a kind of LED module as light source of illumination device, the LED module include drive circuit, it is characterised in that the drive
Galvanic electricity road include the first diode (D1), the second diode (D2), the 3rd diode (D3), the 4th diode (D4), the five or two
Pole pipe (D5), the 6th diode (D6), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4),
The drive circuit further includes overvoltage protection branch road, and the overvoltage protection branch road includes first resistor (R1), second resistance
(R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5), the first Zener diode (DZ1), two pole of the second voltage stabilizing
Pipe (DZ2), NPN triode (Q1) and fet (M1), wherein,
The positive pole of second diode (D2) is connected with one end of AC module (AC), negative pole respectively with the one or two pole
The positive pole of pipe (D1) and one end of the 3rd electric capacity (C3) are connected；
The negative pole of first diode (D1) input respectively with the negative pole and LED module of the 4th diode (D4)
It is connected；
The other end of the 3rd electric capacity (C3) is connected with the other end of alternating current；
The positive pole of the 4th diode (D4) negative pole and first electric capacity respectively with the 5th diode (D5)
(C1) one end is connected；
The other end of first electric capacity (C1) is connected with one end of alternating current；
The positive pole of the 5th diode (D5) negative pole respectively with the 6th diode (D6), the 4th electric capacity (C4)
The other end of one end and alternating current is connected；
The negative pole of the 3rd diode (D3) is connected with described one end of second electric capacity (C2) and one end of alternating current respectively；
The outfan of LED module positive pole respectively with the 3rd diode (D3), second electric capacity (C2) it is another
End, the other end of the 4th electric capacity (C4), the positive pole of the 6th diode (D6) are connected；
One end of the first resistor (R1) one end and input of the LED module respectively with the 4th resistance (R4)
It is connected, the other end of the first resistor (R1) one end respectively with the second resistance (R2), first Zener diode
(DZ1) negative pole and one end of the 3rd resistor (R3) is connected；
The other end of the 3rd resistor (R3) is connected with the base stage of the NPN triode (Q1)；
The other end of the 4th resistance (R4) colelctor electrode respectively with the NPN triode (Q1), the 5th resistance (R5)
One end and second Zener diode (DZ2) negative pole be connected；
The other end of the 5th resistance (R5) is connected with the grid of the fet (M1)；
The drain electrode of the fet (M1) is connected with the outfan of the LED module；And
The source electrode of the fet (M1) other end respectively with the second resistance (R2), two pole of the first voltage stabilizing
The pipe positive pole of (DZ1), the emitter stage of the NPN triode (Q1), the positive pole of second Zener diode (DZ2) and described
The positive pole of the 3rd diode (D3) is connected.
2. LED module as claimed in claim 1, it is characterised in that
In alternating current positive half period, circuit is through second diode (D2), first diode (D1), the LED moulds
Block, the 6th diode (D6) form loop, power to LED module, and the electricity of rectification is exported to the overvoltage protection branch road
Pressure signal, voltage signal and the voltage threshold that pre-set of the overvoltage protection branch road according to input, it is determined whether shut-off
The electric pathway of the LED module, wherein, in alternating current voltage ascent stage, alternating current by second diode (D2) with
And the 3rd electric capacity (C3) forms loop, it is that the 3rd electric capacity (C3) is charged；Meanwhile, alternating current passes through second electric capacity
(C2) it is and the 6th diode (D6) forms loop, that second electric capacity (C2) is charged；Meanwhile, the 4th electric capacity
(C4), first electric capacity (C1), the 4th diode (D4) and the LED module form loop, are the LED module
The electric charge of storage in power supply, i.e., described first electric capacity (C1) and the 4th electric capacity (C4), through the 4th diode
(D4), discharge to the LED module, so as to provide running voltage for the LED module；
In alternating current negative half-cycle, the 5th diode (D5) described in electric current Jing, the 4th diode (D4), the LED module,
3rd diode (D3) forms loop, powers to the LED module, and the electricity of rectification is exported to the overvoltage protection branch road
Pressure signal, voltage signal and the voltage threshold that pre-set of the overvoltage protection branch road according to input, it is determined whether shut-off
The electric pathway of the LED module, wherein, in absolute value of voltage ascent stage, the alternating current in AC module is by described the
Five diodes (D5) and first electric capacity (C1) form loop, charge to first electric capacity (C1)；Meanwhile, alternating current leads to
Cross the 4th electric capacity (C4) and the 3rd diode (D3) forms loop, charge to the 4th electric capacity (C4)；Meanwhile,
Second electric capacity (C2), the 3rd electric capacity (C3), first diode (D1) and LED module form loop, are LED
Module for power supply, i.e., the electric charge of storage in described second electric capacity (C2), the 3rd electric capacity (C3), by first diode
(D1), discharge to the LED module, so as to provide running voltage for the LED module.
3. LED module as claimed in claim 2, it is characterised in that
In alternating current voltage ascent stage, second electric capacity (C2), the 3rd electric capacity (C3) are in parallel on circuit structure
Relation；First electric capacity (C1), the 4th electric capacity (C4) on circuit structure with AC module be series relationship；
In the charging process of absolute value of voltage ascent stage, first electric capacity (C1), the 4th electric capacity (C4) are in circuit
It is parallel relationship in structure；Second electric capacity (C2), the 3rd electric capacity (C3) with AC module are on circuit structure
Series relationship.
4. a kind of LED module as light source of illumination device, the LED module are integrated with and/or are connected with drive circuit, and which is special
Levy and be, the drive circuit includes the first diode (D1), the second diode (D2), the 3rd diode (D3), the four or two pole
Pipe (D4), the 5th diode (D5), the 6th diode (D6), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3),
4th electric capacity (C4), the drive circuit further include overvoltage protection branch road, and the overvoltage protection branch road includes first resistor
(R1), second resistance (R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5), the first Zener diode (DZ1),
Second Zener diode (DZ2), NPN triode (Q1) and fet (M1), wherein,
The positive pole of second diode (D2) is connected with one end of AC module (AC), negative pole respectively with the one or two pole
The positive pole of pipe (D1) and one end of the 3rd electric capacity (C3) are connected；
The negative pole of first diode (D1) input respectively with the negative pole and LED module of the 4th diode (D4)
It is connected；
The other end of the 3rd electric capacity (C3) is connected with the other end of alternating current；
The positive pole of the 4th diode (D4) negative pole and first electric capacity respectively with the 5th diode (D5)
(C1) one end is connected；
The other end of first electric capacity (C1) is connected with one end of alternating current；
The positive pole of the 5th diode (D5) negative pole respectively with the 6th diode (D6), the 4th electric capacity (C4)
The other end of one end and alternating current is connected；
The negative pole of the 3rd diode (D3) is connected with described one end of second electric capacity (C2) and one end of alternating current respectively；
The outfan of LED module positive pole respectively with the 3rd diode (D3), second electric capacity (C2) it is another
End, the other end of the 4th electric capacity (C4), the positive pole of the 6th diode (D6) are connected；
One end of the first resistor (R1) one end and input of the LED module respectively with the 4th resistance (R4)
It is connected, the other end of the first resistor (R1) one end respectively with the second resistance (R2), first Zener diode
(DZ1) negative pole and one end of the 3rd resistor (R3) is connected；
The other end of the 3rd resistor (R3) is connected with the base stage of the NPN triode (Q1)；
The other end of the 4th resistance (R4) colelctor electrode respectively with the NPN triode (Q1), the 5th resistance (R5)
One end and second Zener diode (DZ2) negative pole be connected；
The other end of the 5th resistance (R5) is connected with the grid of the fet (M1)；
The drain electrode of the fet (M1) is connected with the outfan of the LED module；
The source electrode of the fet (M1) other end respectively with the second resistance (R2), two pole of the first voltage stabilizing
The pipe positive pole of (DZ1), the emitter stage of the NPN triode (Q1), the positive pole of second Zener diode (DZ2) and described
The positive pole of the 3rd diode (D3) is connected；
The LED module further includes current regulator diode (CRD), positive pole and the field effect three of the current regulator diode (CRD)
The source electrode of pole pipe (M1) is connected, and negative pole is connected with the positive pole of the 3rd diode (D3).
5. LED module as claimed in claim 4, it is characterised in that
In alternating current positive half period, circuit is through second diode (D2), first diode (D1), the LED moulds
Block, the 6th diode (D6), the current regulator diode (CRD) form loop, power to LED module, and to the overvoltage
Protection branch road exports the voltage signal of rectification, voltage signal and the electricity that pre-set of the overvoltage protection branch road according to input
Pressure threshold value, it is determined whether the electric pathway of the shut-off LED module, wherein, in alternating current voltage ascent stage, alternating current passes through institute
State the second diode (D2) and the 3rd electric capacity (C3) forms loop, be that the 3rd electric capacity (C3) is charged；Meanwhile, exchange
Electricity passes through second electric capacity (C2) and the 6th diode (D6) forms loop, is that second electric capacity (C2) is charged；
Meanwhile, the 4th electric capacity (C4), first electric capacity (C1), the 4th diode (D4), the current regulator diode (CRD)
And the LED module forms loop, is that the LED module is powered, i.e., described first electric capacity (C1) and the 4th electric capacity
(C4) in, the electric charge of storage, through the 4th diode (D4) and the current regulator diode (CRD), puts to the LED module
Electricity, so as to provide running voltage for the LED module；
In alternating current negative half-cycle, the 5th diode (D5) described in electric current Jing, the 4th diode (D4), the LED module,
3rd diode (D3), the current regulator diode (CRD) form loop, power to the LED module, and to the overvoltage
Protection branch road exports the voltage signal of rectification, voltage signal and the electricity that pre-set of the overvoltage protection branch road according to input
Pressure threshold value, it is determined whether the electric pathway of the shut-off LED module, wherein, in absolute value of voltage ascent stage, in AC module
Alternating current pass through the 5th diode (D5) and first electric capacity (C1) and form loop, to first electric capacity (C1)
Charge；Meanwhile, alternating current passes through the 4th electric capacity (C4) and the 3rd diode (D3) forms loop, to the described 4th
Electric capacity (C4) charges；Meanwhile, second electric capacity (C2), the 3rd electric capacity (C3), first diode (D1), the perseverance
Stream diode (CRD) and LED module form loop, are that LED module is powered, i.e., described second electric capacity (C2), the described 3rd electric
Hold the electric charge of storage in (C3), by first diode (D1) and the current regulator diode (CRD), to the LED module
Electric discharge, so as to provide running voltage for the LED module.
6. LED module as claimed in claim 5, it is characterised in that
In alternating current voltage ascent stage, second electric capacity (C2), the 3rd electric capacity (C3) are in parallel on circuit structure
Relation；First electric capacity (C1), the 4th electric capacity (C4) on circuit structure with AC module be series relationship；
In the charging process of absolute value of voltage ascent stage, first electric capacity (C1), the 4th electric capacity (C4) are in circuit
It is parallel relationship in structure；Second electric capacity (C2), the 3rd electric capacity (C3) with AC module are on circuit structure
Series relationship.
7. a kind of LED module as light source of illumination device, the LED module include drive circuit, it is characterised in that the drive
Galvanic electricity road include the first diode (D1), the second diode (D2), the 3rd diode (D3), the 4th diode (D4), the five or two
Pole pipe (D5), the 6th diode (D6), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4),
The drive circuit further includes overvoltage protection branch road, and the overvoltage protection branch road includes first resistor (R1), second resistance
(R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5), the first Zener diode (DZ1), two pole of the second voltage stabilizing
Pipe (DZ2), NPN triode (Q1) and fet (M1), wherein,
The positive pole of second diode (D2) is connected with one end of AC module (AC), negative pole respectively with the one or two pole
The positive pole of pipe (D1) and one end of the 3rd electric capacity (C3) are connected；
The negative pole of first diode (D1) input respectively with the negative pole and LED module of the 4th diode (D4)
It is connected；
The other end of the 3rd electric capacity (C3) is connected with the other end of alternating current；
The positive pole of the 4th diode (D4) negative pole and first electric capacity respectively with the 5th diode (D5)
(C1) one end is connected；
The other end of first electric capacity (C1) is connected with one end of alternating current；
The positive pole of the 5th diode (D5) negative pole respectively with the 6th diode (D6), the 4th electric capacity (C4)
The other end of one end and alternating current is connected；
The negative pole of the 3rd diode (D3) is connected with described one end of second electric capacity (C2) and one end of alternating current respectively；
The outfan of LED module positive pole respectively with the 3rd diode (D3), second electric capacity (C2) it is another
End, the other end of the 4th electric capacity (C4), the positive pole of the 6th diode (D6) are connected；
One end of the first resistor (R1) one end and input of the LED module respectively with the 4th resistance (R4)
It is connected, the other end of the first resistor (R1) one end respectively with the second resistance (R2), first Zener diode
(DZ1) negative pole and one end of the 3rd resistor (R3) is connected；
The other end of the 3rd resistor (R3) is connected with the base stage of the NPN triode (Q1)；
The other end of the 4th resistance (R4) colelctor electrode respectively with the NPN triode (Q1), the 5th resistance (R5)
One end and second Zener diode (DZ2) negative pole be connected；
The other end of the 5th resistance (R5) is connected with the grid of the fet (M1)；
The drain electrode of the fet (M1) is connected with the outfan of the LED module；
The source electrode of the fet (M1) other end respectively with the second resistance (R2), two pole of the first voltage stabilizing
The pipe positive pole of (DZ1), the emitter stage of the NPN triode (Q1), the positive pole of second Zener diode (DZ2) and described
The positive pole of the 3rd diode (D3) LED module that is connected further includes current regulator diode, the positive pole of the current regulator diode
It is connected with the source electrode of fet (M1), negative pole is connected with the positive pole of the 3rd diode (D3)；
The drive circuit further includes current regulator diode (CRD), positive pole and the field effect three of the current regulator diode (CRD)
The source electrode of pole pipe (M1) is connected, and negative pole is connected with the positive pole of the 3rd diode (D3)；
The drive circuit further includes electrochemical capacitor (C5), the positive pole and the LED module of the electrochemical capacitor (C5)
Input is connected, and negative pole is connected with the positive pole of the 6th diode (D6).
8. LED module as claimed in claim 7, it is characterised in that
In alternating current positive half period, circuit is through second diode (D2), first diode (D1), the LED moulds
Block, the 6th diode (D6), the current regulator diode (CRD) form loop, power to LED module, and to the overvoltage
Protection branch road exports the voltage signal of rectification, voltage signal and the electricity that pre-set of the overvoltage protection branch road according to input
Pressure threshold value, it is determined whether the electric pathway of the shut-off LED module, wherein,
In alternating current voltage ascent stage, alternating current passes through second diode (D2) and the 3rd electric capacity (C3) is formed
Loop, is that the 3rd electric capacity (C3) is charged；Meanwhile, alternating current passes through second electric capacity (C2) and the 6th diode
(D6) loop is formed, is that second electric capacity (C2) is charged；Meanwhile, the 4th electric capacity (C4), first electric capacity (C1), institute
State the 4th diode (D4), the current regulator diode (CRD) and the LED module and form loop, be that the LED module is supplied
The electric charge of storage in electricity, i.e., described first electric capacity (C1) and the 4th electric capacity (C4), through the 4th diode (D4)
With the current regulator diode (CRD), discharge to the LED module, so as to provide running voltage for the LED module；
In alternating current negative half-cycle, the 5th diode (D5) described in electric current Jing, the 4th diode (D4), the LED module,
3rd diode (D3), the current regulator diode (CRD) form loop, power to the LED module, and to the overvoltage
Protection branch road exports the voltage signal of rectification, voltage signal and the electricity that pre-set of the overvoltage protection branch road according to input
Pressure threshold value, it is determined whether the electric pathway of the shut-off LED module, wherein,
In absolute value of voltage ascent stage, the alternating current in AC module passes through the 5th diode (D5) and described the
One electric capacity (C1) forms loop, charges to first electric capacity (C1)；Meanwhile, alternating current pass through the 4th electric capacity (C4) and
3rd diode (D3) forms loop, charges to the 4th electric capacity (C4)；Meanwhile, it is second electric capacity (C2), described
3rd electric capacity (C3), first diode (D1), the current regulator diode (CRD) and LED module form loop, are LED
Module for power supply, i.e., the electric charge of storage in described second electric capacity (C2), the 3rd electric capacity (C3), by first diode
(D1) and the current regulator diode (CRD), discharge to the LED module, so as to provide running voltage for the LED module.
9. LED module as claimed in claim 8, it is characterised in that
In alternating current voltage ascent stage, second electric capacity (C2), the 3rd electric capacity (C3) are in parallel on circuit structure
Relation；First electric capacity (C1), the 4th electric capacity (C4) on circuit structure with AC module be series relationship；
In the charging process of absolute value of voltage ascent stage, first electric capacity (C1), the 4th electric capacity (C4) are in circuit
It is parallel relationship in structure；Second electric capacity (C2), the 3rd electric capacity (C3) with AC module are on circuit structure
Series relationship.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410809046.8A CN104661402B (en) | 2013-01-31 | 2013-01-31 | A kind of LED module as light source of illumination device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410809046.8A CN104661402B (en) | 2013-01-31 | 2013-01-31 | A kind of LED module as light source of illumination device |
| CN201310037178.9A CN103152913B (en) | 2012-05-29 | 2013-01-31 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
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| CN201310037178.9A Division CN103152913B (en) | 2012-05-29 | 2013-01-31 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4169008B2 (en) * | 2005-01-31 | 2008-10-22 | 松下電工株式会社 | LED driving device and lighting device using the same |
| CN102098849A (en) * | 2011-01-27 | 2011-06-15 | 陈卫平 | Light-emitting diode (LED) driving chip |
| CN102368881A (en) * | 2011-07-06 | 2012-03-07 | 晋宝电气（浙江）有限公司 | Constant current driving system used for LED lamp |
| CN202385328U (en) * | 2011-06-07 | 2012-08-15 | 浙江闪亮电子科技有限公司 | Alternating current LED illuminating lamp capacitor transformation short circuit protective circuit |
| CN202425163U (en) * | 2012-02-14 | 2012-09-05 | 苏州大学 | Input voltage adaptive circuit for LED (Light Emitting Diode) light source |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4169008B2 (en) * | 2005-01-31 | 2008-10-22 | 松下電工株式会社 | LED driving device and lighting device using the same |
| CN102098849A (en) * | 2011-01-27 | 2011-06-15 | 陈卫平 | Light-emitting diode (LED) driving chip |
| CN202385328U (en) * | 2011-06-07 | 2012-08-15 | 浙江闪亮电子科技有限公司 | Alternating current LED illuminating lamp capacitor transformation short circuit protective circuit |
| CN102368881A (en) * | 2011-07-06 | 2012-03-07 | 晋宝电气（浙江）有限公司 | Constant current driving system used for LED lamp |
| CN202425163U (en) * | 2012-02-14 | 2012-09-05 | 苏州大学 | Input voltage adaptive circuit for LED (Light Emitting Diode) light source |
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