CN103152914B - Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module - Google Patents
Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module Download PDFInfo
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- CN103152914B CN103152914B CN201310037188.2A CN201310037188A CN103152914B CN 103152914 B CN103152914 B CN 103152914B CN 201310037188 A CN201310037188 A CN 201310037188A CN 103152914 B CN103152914 B CN 103152914B
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Abstract
The invention discloses an alternating current rectifying circuit and an alternating current rectifying method for driving a light-emitting diode (LED) module. The method comprises that when an alternating current module is in a positive half cycle, an alternating current output by the alternating current module is rectified to be output to a positive half cycle rectifying branch circuit of an external LED module. When the alternating current module is in a negative half cycle, charging is carried out according to the current output by the alternating current module, and when the alternating current module is in the positive half cycle, the electro-discharge is carried out, and the alternating current is output to a positive half cycle feed branch circuit of the external LED module. When the alternating current module is in the negative half cycle, the alternating current output by the alternating current module is rectified, and the alternating current is output to a negative half cycle rectifying branch circuit of the external LED module. When the alternating current module is in the positive half cycle, the charging is carried out according to the alternating current output by the alternating current module, and when the alternating current module is in the negative half cycle, the electro-discharge is carried out and the alternating current is output to a negative half feed branch circuit of the external LED module. By means of the alternating current rectifying circuit, stability of output voltage can be improved, and luminous efficiency of the LED module is improved.
Description
Technical field
The present invention relates to AC rectification technology, particularly relate to a kind of the AC rectification circuit and the AC rectification method that drive light-emitting diode (LED, Light Emitting Diode) module.
Background technology
Light-emitting diode (LED, Light Emitting Diode) module, as a kind of new light sources of high benefit, owing to having life-span long, the advantage such as energy consumption is low, energy-conserving and environment-protective, is widely used in the illumination of business, industry, family field.
When LED module is as light source of illumination device, the life-span of lighting device not only depends on the luminescent properties of LED, also depends on the stability of the drive circuit assembly providing LED module operating voltage.In current application scheme, the bottleneck in LED module life-span remains the voltage stability that drive circuit provides.In order to reduce the aging effects of fluctuation to LED module of driving voltage, needing the alternating current based on existing extensive use, designing brand-new AC rectification circuit, in order to provide stable driving voltage, thus driving LED module.
Bridge rectifier adopts semiconductor rectifier diode (or claiming diode) to connect into simple rectification circuit, be widely used in the voltage stabilizing application of various AC-DC conversion, pass through bridge rectifier, alternating current (AC) is rectified into direct current (DC), comparatively stable voltage can be provided for LED module, thus promote the useful life of LED module.
Fig. 1 is the AC rectification electrical block diagram of existing driving LED module.LED module is connected to the DC output end of AC rectification circuit, by this AC rectification circuit, rectification is carried out to alternating current, can Direct driver LED module, see Fig. 1, this AC rectification circuit is bridge rectifier, comprising: alternating current module (AC), the first diode D1, the second 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 connected with the negative pole of the 3rd diode D3 and the input (V+) of external LED module respectively;
The positive pole of the second diode D2 is connected with the positive pole of the 4th diode D4 and the output (V-) of external LED module respectively;
The positive pole of the 3rd diode D3 is connected with the negative pole of the 4th diode D4;
One end (A1) of alternating current module is connected with the positive pole of the first diode D1, and the other end (A2) is connected with the positive pole of the second diode D2.
The cycle of alternating current comprises: positive half period and negative half-cycle, and wherein, positive half period is that alternating current rises to positive peak value from null value and drops to the time period of null value experience from positive peak value; Negative half-cycle is that alternating current drops to negative peak value from null value and rises to the time period of null value experience from negative peak value.
At the positive half period of alternating current, the alternating current that alternating current module exports, by the first diode D1, external LED module and the 4th diode D4, forms current circuit, for external LED module provides operating voltage;
At the negative half period device of alternating current, the alternating current that alternating current module exports, by the 3rd diode D3, external LED module and the second diode D2, forms another current circuit, for external LED module provides operating voltage.
From above-mentioned, the AC rectification circuit of existing driving LED module, alternating current is by after the rectification of diode, Direct driver LED module works, because alternating current is cyclic fluctuation, and LED module exists certain cut-in voltage, when the voltage being namely only carried in LED module two ends exceedes cut-in voltage, LED module just can conducting luminous; If the voltage being carried in LED module two ends does not exceed cut-in voltage, LED module is in cut-off state, is namely in non-light emitting state.Thus, existing AC rectification circuit, when current circuit turns to, the voltage that can be supplied to external LED module is less than cut-in voltage, makes the luminous efficiency of LED module lower; Further, the rectification of diode in AC rectification circuit, the magnitude of voltage exporting LED module to fluctuates along with AC voltage fluctuations, and output voltage stability is lower, make LED module occur obvious scintillation, decrease the useful life of LED module.
Summary of the invention
Embodiments of the invention provide a kind of AC rectification circuit of driving LED module, improve the stability of output voltage, promote the luminous efficiency of LED module.
Embodiments of the invention also provide a kind of AC rectification method of driving LED module, improve the stability of output voltage, promote the luminous efficiency of LED module.
For achieving the above object, the AC rectification circuit of a kind of driving LED module that the embodiment of the present invention provides, this AC rectification circuit comprises: alternating current 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 alternating current module is in positive half cycle, carries out rectification to the alternating current that alternating current module exports, the voltage signal after rectification is exported to outside LED module;
Positive half cycle feed leg, for when alternating current module is in negative half period, charges according to the alternating current that alternating current module exports; When alternating current module is in positive half cycle, discharge, the voltage signal of electric discharge is exported to outside LED module;
Negative half period rectification branch road, for when alternating current module is in negative half period, carries out rectification to the alternating current that alternating current module exports, the voltage signal after rectification is exported to outside LED module;
Negative half period feed leg, for when alternating current module is in positive half cycle, charges according to the alternating current that alternating current module exports; When alternating current module is in negative half period, discharge, the voltage signal of electric discharge is exported to outside LED module.
Preferably, described positive half cycle rectification branch road comprises: the first rectifying tube, the second rectifying tube and the 6th rectifying tube, wherein,
The positive pole of the second rectifying tube is connected with one end of alternating current module, and negative pole is connected with the positive pole of the first rectifying tube;
The negative pole of the first rectifying tube is connected with the input of external LED module;
The positive pole of the 6th rectifying tube is connected with the output of external LED module, and negative pole is connected with the other end of alternating current module.
Preferably, described negative half period rectification branch road comprises: the 3rd rectifying tube, the 4th rectifying tube and the 5th rectifying tube, wherein,
The negative pole of the 3rd rectifying tube is connected with one end of alternating current module, and positive pole is connected with the output of external LED module;
The positive pole of the 5th rectifying tube is connected with the other end of alternating current module, and negative pole is connected with the positive pole of the 4th rectifying tube;
The negative pole of the 4th rectifying tube is connected with the input of external LED module.
Preferably, described positive half cycle feed leg comprises: the 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 alternating current module;
One end of 4th electric capacity is connected with the other end of alternating current module, and the other end is connected with the output of external LED module.
Preferably, described negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, wherein,
One end of second electric capacity is connected with one end of alternating current module, and the other end is connected with the output of external LED module;
One end of 3rd electric capacity is connected with the positive pole of the first rectifying tube, and the other end is connected with the other end of alternating current module.
Preferably, described rectifying tube is diode, triode or silicon controlled rectifier.
Preferably, described first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity adopt polarity free capacitor.
Preferably, described first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity have identical capacitance.
Preferably,
At alternating current positive half period, electric current forms loop through the second diode, the first diode, LED module, the 6th diode, powers to LED module, wherein,
At alternating current voltage ascent stage, alternating current forms loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Meanwhile, alternating current forms loop by the second electric capacity and the 6th diode, is the second capacitor charging; Meanwhile, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form loop, for LED module is powered;
At alternating current negative half-cycle, electric current forms loop through the 5th diode, the 4th diode, LED module, the 3rd diode, powers to LED module, wherein,
At absolute value of voltage ascent stage, the alternating current in alternating current module forms loop, to the first capacitor charging by the 5th diode and the first electric capacity; Meanwhile, alternating current forms loop, to the 4th capacitor charging by the 4th electric capacity and the 3rd diode; Meanwhile, the second electric capacity, the 3rd electric capacity, the first diode and LED module form loop, for LED module is powered.
Preferably, described AC rectification circuit comprises further: current regulator diode,
The positive pole of described current regulator diode is connected with the output of LED module, and negative pole is connected with the positive pole of the 3rd diode.
Preferably, described AC rectification circuit comprises further: electrochemical capacitor,
The positive pole of described electrochemical capacitor is connected with the input of LED module, and negative pole is connected with the output of LED module.
A kind of AC rectification method driving LED module, by AC rectification drives LED module, this AC rectification circuit comprises: alternating current module, positive half cycle rectification branch road, positive half cycle feed leg, negative half period rectification branch road and negative half period feed leg, and the method comprises:
When alternating current module is in positive half cycle, positive half cycle rectification branch road carries out rectification to the alternating current that alternating current module exports, and the voltage signal after rectification is exported to outside LED module;
The alternating current that negative half period feed leg exports according to alternating current module charges, and positive half cycle feed leg is discharged, and the voltage signal of electric discharge is exported to outside LED module;
When alternating current module is in negative half period, negative half period rectification branch road carries out rectification to the alternating current that alternating current module exports, and the voltage signal after rectification is exported to outside LED module;
Negative half period feed leg is discharged, and the voltage signal of electric discharge is exported to outside LED module, the alternating current that positive half cycle feed leg exports according to alternating current module charges.
Wherein, described positive half cycle rectification branch road comprises: the first rectifying tube, the second rectifying tube and the 6th rectifying tube, wherein,
The positive pole of the second rectifying tube is connected with one end of alternating current module, and negative pole is connected with the positive pole of the first rectifying tube;
The negative pole of the first rectifying tube is connected with the input of external LED module;
The positive pole of the 6th rectifying tube is connected with the output of external LED module, and negative pole is connected with the other end of alternating current module.
Wherein, described negative half period rectification branch road comprises: the 3rd rectifying tube, the 4th rectifying tube and the 5th rectifying tube, wherein,
The negative pole of the 3rd rectifying tube is connected with one end of alternating current module, and positive pole is connected with the output of external LED module;
The positive pole of the 5th rectifying tube is connected with the other end of alternating current module, and negative pole is connected with the positive pole of the 4th rectifying tube;
The negative pole of the 4th rectifying tube is connected with the input of external LED module.
Wherein, described positive half cycle feed leg comprises: the 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 alternating current module;
One end of 4th electric capacity is connected with the other end of alternating current module, and the other end is connected with the output of external LED module.
Wherein, described negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, wherein,
One end of second electric capacity is connected with one end of alternating current module, and the other end is connected with the output of external LED module;
One end of 3rd electric capacity is connected with the positive pole of the first rectifying tube, and the other end is connected with the other end of alternating current module.
Wherein,
At alternating current positive half period, electric current forms loop through the second diode, the first diode, LED module, the 6th diode, powers to LED module, wherein,
At alternating current voltage ascent stage, alternating current forms loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Meanwhile, alternating current forms loop by the second electric capacity and the 6th diode, is the second capacitor charging; Meanwhile, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form loop, for LED module is powered;
At alternating current negative half-cycle, electric current forms loop through the 5th diode, the 4th diode, LED module, the 3rd diode, powers to LED module, wherein,
At absolute value of voltage ascent stage, the alternating current in alternating current module forms loop, to the first capacitor charging by the 5th diode and the first electric capacity; Meanwhile, alternating current forms loop, to the 4th capacitor charging by the 4th electric capacity and the 3rd diode; Meanwhile, the second electric capacity, the 3rd electric capacity, the first diode and LED module form loop, for LED module is powered.
As seen from the above technical solution, the AC rectification circuit of a kind of driving LED module that the embodiment of the present invention provides and AC rectification method, comprise: alternating current 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 alternating current module is in positive half cycle, rectification is carried out to the alternating current that alternating current module exports, the voltage signal after rectification is exported to outside LED module; Positive half cycle feed leg, for when alternating current module is in negative half period, charges according to the alternating current that alternating current module exports; When alternating current module is in positive half cycle, discharge, the voltage signal of electric discharge is exported to outside LED module; Negative half period rectification branch road, for when alternating current module is in negative half period, carries out rectification to the alternating current that alternating current module exports, the voltage signal after rectification is exported to outside LED module; Negative half period feed leg, for when alternating current module is in positive half cycle, charges according to the alternating current that alternating current module exports; When alternating current module is in negative half period, discharge, the voltage signal of electric discharge is exported to outside LED module.Like this, utilize the charge and discharge of electric capacity, on the circuit base of the direct driving LED module of existing alternating current, improve the stability of output voltage, improve the utilance of alternating current each half period, increase the ON time of LED, reduce LED luminous fluctuations simultaneously, and ensure that higher power factor, improve the luminous efficiency of LED module.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below.Apparently, the accompanying drawing in below describing is only some embodiments of the present invention, for those of ordinary skills, can also obtain other embodiment and accompanying drawing thereof according to these accompanying drawing illustrated embodiments.
Fig. 1 is the AC rectification electrical block diagram of existing driving LED module.
Fig. 2 is the AC rectification electrical block diagram of embodiment of the present invention driving LED module.
Fig. 3 is the AC rectification circuit concrete structure schematic diagram of embodiment of the present invention driving LED module.
Fig. 4 is another concrete structure schematic diagram of AC rectification circuit of embodiment of the present invention driving LED module.
Fig. 5 is an AC rectification circuit concrete structure schematic diagram again of embodiment of the present invention driving LED module.
Fig. 6 is the AC rectification method flow schematic diagram of embodiment of the present invention driving LED module.
Embodiment
Carry out clear, complete description below with reference to accompanying drawing to the technical scheme of various embodiments of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
The AC rectification circuit of existing driving LED module, because alternating current is cyclic fluctuation, and there is certain cut-in voltage in LED module, thus, when current circuit turns to, the voltage that can be supplied to external LED module is less than cut-in voltage, makes the luminous efficiency of LED module lower; Further, the rectification of diode in AC rectification circuit, the magnitude of voltage exporting LED module to fluctuates along with AC voltage fluctuations, and output voltage stability is lower, affects the useful life of LED module.
In the embodiment of the present invention, for the shortcoming of prior art alternating current direct driving circuit, the drive circuit of the direct driving LED module of a kind of alternating current is provided, for LED module provides drive current, namely utilize the charge and discharge of electric capacity to increase the angle of flow, and the trough of alternating current is filled, improve power-efficient, reduce LED light-emitting flash phenomenon.
Fig. 2 is the AC rectification electrical block diagram of embodiment of the present invention driving LED module.See Fig. 2, this AC rectification circuit comprises: alternating current 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 alternating current module is in positive half cycle, carries out rectification to the alternating current that alternating current module exports, the voltage signal after rectification is exported to outside LED module;
Positive half cycle feed leg, for when alternating current module is in negative half period, charges according to the alternating current that alternating current module exports; For when alternating current module is in positive half cycle, discharge, the voltage signal of electric discharge is exported to outside LED module;
Negative half period rectification branch road, for when alternating current module is in negative half period, carries out rectification to the alternating current that alternating current module exports, the voltage signal after rectification is exported to outside LED module;
Negative half period feed leg, for when alternating current module is in positive half cycle, charges according to the alternating current that alternating current module exports; For when alternating current module is in negative half period, discharge, the voltage signal of electric discharge is exported to outside LED module.
In the embodiment of the present invention, outside LED module also can be other load blocks, and such as, other need the load under stable operating voltage.
Wherein, positive half cycle rectification branch road comprises: the first rectifying tube D1, the second rectifying tube D2 and the 6th rectifying tube D6(are not shown), wherein,
The positive pole of the second rectifying tube D2 is connected with one end (A1) of alternating current module, and negative pole is connected with the positive pole of the first rectifying tube D1;
The negative pole of the first rectifying tube D1 is connected with the input of external LED module;
The positive pole of the 6th rectifying tube D6 is connected with the output of external LED module, and negative pole is connected with the other end (A2) of alternating current module.
Negative half period rectification branch road comprises: the 3rd rectifying tube D3, the 4th rectifying tube D4 and the 5th rectifying tube D5(are not shown), wherein,
The negative pole of the 3rd rectifying tube D3 is connected with one end (A1) of alternating current module, and positive pole is connected with the output of external LED module;
The positive pole of the 5th rectifying tube D5 is connected with the other end (A2) of alternating current module, and negative pole is connected with the positive pole of the 4th rectifying tube D4;
The negative pole of the 4th rectifying tube D4 is connected with the input of external LED module.
Positive half cycle feed leg comprises: the first electric capacity C1 and the 4th electric capacity C4(is not shown), wherein,
One end of first electric capacity C1 is connected with the positive pole of the 4th diode D4, and the other end is connected with one end (A1) of alternating current module;
One end of 4th electric capacity C4 is connected with the other end (A2) of alternating current module, and the other end is connected with the output of external LED module.
Negative half period feed leg comprises: the second electric capacity C2 and the 3rd electric capacity C3(is not shown), wherein,
One end of second electric capacity C2 is connected with one end (A1) of alternating current module, and the other end is connected with the output of external LED module;
One end of 3rd electric capacity C3 is connected with the positive pole of the first rectifying tube D1, and the other end is connected with the other end (A2) of alternating current module.
Preferably, rectifying tube can be diode, can be also triode, as long as have the device of unilateal conduction characteristic, such as, and silicon controlled rectifier etc.Preferably, adopt semiconductor rectifier diode, not only with low cost, and be convenient to carry out Two-level ensemble with LED module etc., the LED light device of being integrally formed alternating current Direct driver.
Be diode below with rectifying tube be example, the embodiment of the present invention is described in detail.
Fig. 3 is the AC rectification circuit concrete structure schematic diagram of embodiment of the present invention driving LED module.See Fig. 3, the AC rectification circuit of this driving LED module comprises: the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode 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, the 5th electric capacity C5 and LED module, wherein
The positive pole of the second diode D2 is connected with one end (A1) of alternating current module (AC), and negative pole is connected with the positive pole of the first diode D1 and one end of the 3rd electric capacity C3 respectively;
The negative pole of the first diode D1 is connected with the input (V+) of the negative pole of the 4th diode D4, one end of the 5th electric capacity C5 and LED module respectively;
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 the negative pole of the 5th diode D5 and one end of the first electric capacity C1 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 is connected with the negative pole of the 6th diode D6, one end of the 4th electric capacity C4 and the other end of alternating current respectively;
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;
The output (V-) of LED module is connected with the other end of the other end of the positive pole of the 3rd diode D3, the second electric capacity C2, the other end of the 4th electric capacity C4, the positive pole of the 6th diode D6 and the 5th electric capacity C5 respectively.
In the embodiment of the present invention, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 are operated in exchange status, need to bear reverse voltage, preferably, first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 all adopt polarity free capacitor, to adapt to alternate current operation environment.The ac voltage withstanding value of polarity free capacitor should be greater than or at least equal AC-input voltage value.
Preferably, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4 have identical or close capacitance.
The operation principle of embodiment of the present invention circuit is described below:
At alternating current positive half period, electric current forms loop through the second diode D2, the first diode D1, LED module, the 6th diode D6, powers to LED module.Wherein,
At alternating current voltage ascent stage, alternating current forms loop by the second diode D2 and the 3rd electric capacity C3, is that the 3rd electric capacity C3 charges; Meanwhile, alternating current forms loop by the second electric capacity C2 and the 6th diode D6, is that the second electric capacity C2 charges; Meanwhile, the 4th electric capacity C4, the first electric capacity C1, the 4th diode D4 and LED module form loop, for LED module is powered, namely the electric charge stored in the first electric capacity C1 and the 4th electric capacity C4, through the 4th diode D4, to LED module electric discharge, thus provide operating voltage for LED module.
In the embodiment of the present invention, at alternating current voltage ascent stage, the second electric capacity C2, the 3rd electric capacity C3 are parallel relationship on circuit structure; First electric capacity C1, the 4th electric capacity C4 are series relationship with alternating current module on circuit structure, for LED module is powered, be equivalent to when alternating current module is initially powered or switched positive and negative half period, increase the voltage of alternating current, enable LED module shorting advance, thus promote the quality factor of circuit, and improve the stability of output voltage, improve the luminous efficiency of LED module, also improve the useful life of LED module.
At alternating current negative half-cycle, electric current forms loop through the 5th diode D5, the 4th diode D4, LED module, the 3rd diode D3, powers to LED module.Wherein,
At absolute value of voltage ascent stage, the alternating current in alternating current module forms loop by the 5th diode D5 and the first electric capacity C1, charges to the first electric capacity C1; Meanwhile, alternating current forms loop by the 4th electric capacity C4 and the 3rd diode D3, 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 form loop, for LED module is powered, namely the electric charge stored in the second electric capacity C2, the 3rd electric capacity C3, by the first diode D1, to LED module electric discharge, thus provide operating 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 are parallel relationship on circuit structure; Second electric capacity C2, the 3rd electric capacity C3 are series relationship with alternating current module on circuit structure, are equivalent to when alternating current switches, and increase the absolute value of voltage of alternating current, enable LED module shorting advance.
In the embodiment of the present invention, by the discharge and recharge that the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4 replace at alternating current positive half period and alternating current negative half-cycle, make the magnitude of voltage exporting LED module to comparatively stable, decrease flicker frequency during LED module luminescence; Meanwhile, add the ON time of LED module in alternating current positive half period and alternating current negative half-cycle, reduce the luminous fluctuations of LED module, and improve the power factor of circuit.Further, the circuit structure of the embodiment of the present invention is succinct, and power-efficient is high, is suitable for very much the lighting device of the LED module of alternating current Direct driver.
In practical application, in order to ensure can not to differ too large at alternating current positive and negative half period output current, in Fig. 2 and Fig. 3, the equivalent resistance of each branch road should be identical or close, namely the diode parameters in each branch road should be identical or close, each electric capacity also should have identical or close capacitance, and such as, the diode parameters in positive half cycle rectification branch road should be identical or close with the diode parameters in negative half period rectification branch road; Capacitance in positive half cycle feed leg should be identical or close with the capacitance in negative half period feed leg.
In the embodiment of the present invention, the electric capacity that Selection parameter is identical or close, for raising, electrically balance is beneficial, is conducive to balanced load equally, reduces flicker and improve power-efficient.In the embodiment of the present invention, mainly utilize the charge-discharge characteristic of electric capacity, thus, electric capacity (capacitance) parameter is most important parameter, selects the electric capacity that electric capacity is identical or close, and charge-discharge characteristic just can reach identical or close substantially.
Preferably, in order to improve the stability exporting the voltage signal of LED module to further, the AC rectification circuit of the driving LED module of the embodiment of the present invention comprises current regulator diode (CRD, Current Regulative Diode) further.
Fig. 4 is another concrete structure schematic diagram of AC rectification circuit of embodiment of the present invention driving LED module.See Fig. 4, with Fig. 3 unlike, comprise current regulator diode (CRD, Current Regulative Diode) further, the positive pole of CRD is connected with the output of LED module, and negative pole is connected with the positive pole of the 3rd diode D3.Like this, being used for current limliting by increasing a current regulator diode in DC loop, making the luminous efficiency of LED module have very large lifting.
In figure 3, although the embodiment of the present invention can solve the fluctuation problem of LED module light output to a certain extent, fill up degree to alternating current trough little, at alternating voltage trough place, LED module light output only has 30% ~ 40% of crest place light output.
Thus, a kind of preferred version of the present invention is provided, as shown in Figure 5.
Fig. 5 is an AC rectification circuit concrete structure schematic diagram again of embodiment of the present invention driving LED module.See Fig. 5, with Fig. 4 unlike, on basic circuit basis of the present invention, add an electrochemical capacitor C5 as filter capacitor, the positive pole of electrochemical capacitor C5 is connected with the input of LED module, and negative pole is connected with the output of LED module.Like this, due to the filter function of electrochemical capacitor C5, make the current waveform of inflow LED module more level and smooth, although sacrifice some power factors, but LED module is at the light output at alternating voltage trough place, more than 80% of light output during crest can be reached, sense organ does not almost have difference.
Fig. 6 is the AC rectification method flow schematic diagram of embodiment of the present invention driving LED module.See Fig. 6, by AC rectification drives LED module, this AC rectification circuit comprises: alternating current module, positive half cycle rectification branch road, positive half cycle feed leg, negative half period rectification branch road and negative half period feed leg, and this flow process comprises:
Step 601, when alternating current module is in positive half cycle, positive half cycle rectification branch road carries out rectification to the alternating current that alternating current module exports, and the voltage signal after rectification is exported to outside LED module;
In this step, positive half cycle rectification branch road comprises: the first rectifying tube, the second rectifying tube and the 6th rectifying tube, wherein,
The positive pole of the second rectifying tube is connected with one end of alternating current module, and negative pole is connected with the positive pole of the first rectifying tube;
The negative pole of the first rectifying tube is connected with the input of external LED module;
The positive pole of the 6th rectifying tube is connected with the output of external LED module, and negative pole is connected with the other end of alternating current module.
Step 602, the alternating current that negative half period feed leg exports according to alternating current module charges, and positive half cycle feed leg is discharged, and the voltage signal of electric discharge is exported to outside LED module;
In this step, negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, wherein,
One end of second electric capacity is connected with one end of alternating current module, and the other end is connected with the output of external LED module;
One end of 3rd electric capacity is connected with the positive pole of the first rectifying tube, and the other end is connected with the other end of alternating current module.
Positive half cycle feed leg comprises: the 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 alternating current module;
One end of 4th electric capacity is connected with the other end of alternating current module, and the other end is connected with the output of external LED module.
Step 603, when alternating current module is in negative half period, negative half period rectification branch road carries out rectification to the alternating current that alternating current module exports, and the voltage signal after rectification is exported to outside LED module;
In this step, negative half period rectification branch road comprises: the 3rd rectifying tube, the 4th rectifying tube and the 5th rectifying tube, wherein,
The negative pole of the 3rd rectifying tube is connected with one end of alternating current module, and positive pole is connected with the output of external LED module;
The positive pole of the 5th rectifying tube is connected with the other end of alternating current module, and negative pole is connected with the positive pole of the 4th rectifying tube;
The negative pole of the 4th rectifying tube is connected with the input of external LED module.
Step 604, negative half period feed leg is discharged, and the voltage signal of electric discharge is exported to outside LED module, the alternating current that positive half cycle feed leg exports according to alternating current module charges.
Like this, in the embodiment of the present invention, at alternating current positive half period, electric current forms loop through the second diode, the first diode, LED module, the 6th diode, powers to LED module, wherein,
At alternating current voltage ascent stage, alternating current forms loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Meanwhile, alternating current forms loop by the second electric capacity and the 6th diode, is the second capacitor charging; Meanwhile, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form loop, for LED module is powered;
At alternating current negative half-cycle, electric current forms loop through the 5th diode, the 4th diode, LED module, the 3rd diode, powers to LED module, wherein,
At absolute value of voltage ascent stage, the alternating current in alternating current module forms loop, to the first capacitor charging by the 5th diode and the first electric capacity; Meanwhile, alternating current forms loop, to the 4th capacitor charging by the 4th electric capacity and the 3rd diode; Meanwhile, the second electric capacity, the 3rd electric capacity, the first diode and LED module form loop, for LED module is powered.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the claims in the present invention and equivalent technologies thereof to these amendments of the present invention and modification, then the present invention also comprises these change and modification.
Claims (9)
1. drive an AC rectification circuit for LED module, it is characterized in that, this AC rectification circuit comprises: alternating current 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 alternating current module is in positive half cycle, carries out rectification to the alternating current that alternating current module exports, the voltage signal after rectification is exported to outside LED module; Described positive half cycle rectification branch road comprises: the first rectifying tube, the second rectifying tube and the 6th rectifying tube, and wherein, the positive pole of the second rectifying tube is connected with one end of alternating current module, and negative pole is connected with the positive pole of the first rectifying tube; The negative pole of the first rectifying tube is connected with the input of external LED module; Further, the positive pole of the 6th rectifying tube is connected with the output of external LED module, and negative pole is connected with the other end of alternating current module;
Positive half cycle feed leg, for when alternating current module is in negative half period, charges according to the alternating current that alternating current module exports; When alternating current module is in positive half cycle, discharge, the voltage signal of electric discharge is exported to outside LED module; Described positive half cycle feed leg comprises: the first electric capacity and the 4th electric capacity, and wherein, one end of the first electric capacity is connected with the positive pole of the 4th diode, and the other end is connected with one end of alternating current module; Further, one end of the 4th electric capacity is connected with the other end of alternating current module, and the other end is connected with the output of external LED module;
Negative half period rectification branch road, for when alternating current module is in negative half period, carries out rectification to the alternating current that alternating current module exports, the voltage signal after rectification is exported to outside LED module; Described negative half period rectification branch road comprises: the 3rd rectifying tube, the 4th rectifying tube and the 5th rectifying tube, and wherein, the negative pole of the 3rd rectifying tube is connected with one end of alternating current module, and positive pole is connected with the output of external LED module; The positive pole of the 5th rectifying tube is connected with the other end of alternating current module, and negative pole is connected with the positive pole of the 4th rectifying tube; Further, the negative pole of the 4th rectifying tube is connected with the input of external LED module;
Negative half period feed leg, for when alternating current module is in positive half cycle, charges according to the alternating current that alternating current module exports; When alternating current module is in negative half period, discharge, the voltage signal of electric discharge is exported to outside LED module; Described negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, and wherein, one end of the second electric capacity is connected with one end of alternating current module, and the other end is connected with the output of external LED module; Further, one end of the 3rd electric capacity is connected with the positive pole of the first rectifying tube, and the other end is connected with the other end of alternating current module.
2. AC rectification circuit according to claim 1, is characterized in that, described rectifying tube is diode, triode or silicon controlled rectifier.
3. AC rectification circuit according to claim 2, is characterized in that, described first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity adopt polarity free capacitor.
4. AC rectification circuit according to claim 3, is characterized in that, described first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity have identical capacitance.
5. AC rectification circuit according to claim 3, is characterized in that,
At alternating current positive half period, electric current forms loop through the second diode, the first diode, LED module, the 6th diode, powers to LED module, wherein,
At alternating current voltage ascent stage, alternating current forms loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Meanwhile, alternating current forms loop by the second electric capacity and the 6th diode, is the second capacitor charging; Meanwhile, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form loop, for LED module is powered;
At alternating current negative half-cycle, electric current forms loop through the 5th diode, the 4th diode, LED module, the 3rd diode, powers to LED module, wherein,
At absolute value of voltage ascent stage, the alternating current in alternating current module forms loop, to the first capacitor charging by the 5th diode and the first electric capacity; Meanwhile, alternating current forms loop, to the 4th capacitor charging by the 4th electric capacity and the 3rd diode; Meanwhile, the second electric capacity, the 3rd electric capacity, the first diode and LED module form loop, for LED module is powered.
6. AC rectification circuit according to claim 5, is characterized in that, described AC rectification circuit comprises further: current regulator diode,
The positive pole of described current regulator diode is connected with the output of LED module, and negative pole is connected with the positive pole of the 3rd diode.
7. AC rectification circuit according to claim 6, is characterized in that, described AC rectification circuit comprises further: electrochemical capacitor,
The positive pole of described electrochemical capacitor is connected with the input of LED module, and negative pole is connected with the output of LED module.
8. one kind drives the AC rectification method of LED module, by AC rectification drives LED module, this AC rectification circuit comprises: alternating current module, positive half cycle rectification branch road, positive half cycle feed leg, negative half period rectification branch road and negative half period feed leg, and the method comprises:
When alternating current module is in positive half cycle, positive half cycle rectification branch road carries out rectification to the alternating current that alternating current module exports, and the voltage signal after rectification is exported to outside LED module; Described positive half cycle rectification branch road comprises: the first rectifying tube, the second rectifying tube and the 6th rectifying tube, and wherein, the positive pole of the second rectifying tube is connected with one end of alternating current module, and negative pole is connected with the positive pole of the first rectifying tube; The negative pole of the first rectifying tube is connected with the input of external LED module; Further, the positive pole of the 6th rectifying tube is connected with the output of external LED module, and negative pole is connected with the other end of alternating current module;
The alternating current that negative half period feed leg exports according to alternating current module charges, and positive half cycle feed leg is discharged, and the voltage signal of electric discharge is exported to outside LED module; Described negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, and wherein, one end of the second electric capacity is connected with one end of alternating current module, and the other end is connected with the output of external LED module; Further, one end of the 3rd electric capacity is connected with the positive pole of the first rectifying tube, and the other end is connected with the other end of alternating current module;
When alternating current module is in negative half period, negative half period rectification branch road carries out rectification to the alternating current that alternating current module exports, and the voltage signal after rectification is exported to outside LED module; Described negative half period rectification branch road comprises: the 3rd rectifying tube, the 4th rectifying tube and the 5th rectifying tube, and wherein, the negative pole of the 3rd rectifying tube is connected with one end of alternating current module, and positive pole is connected with the output of external LED module; The positive pole of the 5th rectifying tube is connected with the other end of alternating current module, and negative pole is connected with the positive pole of the 4th rectifying tube; Further, the negative pole of the 4th rectifying tube is connected with the input of external LED module;
Negative half period feed leg is discharged, and the voltage signal of electric discharge is exported to outside LED module, the alternating current that positive half cycle feed leg exports according to alternating current module charges; Described positive half cycle feed leg comprises: the first electric capacity and the 4th electric capacity, and wherein, one end of the first electric capacity is connected with the positive pole of the 4th diode, and the other end is connected with one end of alternating current module; Further, one end of the 4th electric capacity is connected with the other end of alternating current module, and the other end is connected with the output of external LED module.
9. AC rectification method according to claim 8, wherein,
At alternating current positive half period, electric current forms loop through the second diode, the first diode, LED module, the 6th diode, powers to LED module, wherein,
At alternating current voltage ascent stage, alternating current forms loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Meanwhile, alternating current forms loop by the second electric capacity and the 6th diode, is the second capacitor charging; Meanwhile, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form loop, for LED module is powered;
At alternating current negative half-cycle, electric current forms loop through the 5th diode, the 4th diode, LED module, the 3rd diode, powers to LED module, wherein,
At absolute value of voltage ascent stage, the alternating current in alternating current module forms loop, to the first capacitor charging by the 5th diode and the first electric capacity; Meanwhile, alternating current forms loop, to the 4th capacitor charging by the 4th electric capacity and the 3rd diode; Meanwhile, the second electric capacity, the 3rd electric capacity, the first diode and LED module form loop, for LED module is powered.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410809004.4A CN104540283B (en) | 2013-01-31 | 2013-01-31 | A kind of LED module as light source of illumination device |
| CN201310037188.2A CN103152914B (en) | 2012-05-29 | 2013-01-31 | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module |
| EP13873234.2A EP2953429A4 (en) | 2013-01-31 | 2013-12-24 | Alternating current rectifying circuit and alternating current rectifying method for driving led module |
| PCT/CN2013/090330 WO2014117607A1 (en) | 2013-01-31 | 2013-12-24 | Alternating current rectifying circuit and alternating current rectifying method for driving led module |
| CA2899390A CA2899390C (en) | 2013-01-31 | 2013-12-24 | Alternating current rectifying circuit and alternating current rectifying method for driving led module |
| US14/762,666 US9565724B2 (en) | 2013-01-31 | 2013-12-24 | Alternating current rectifying circuit and alternating current rectifying method for driving LED module |
| EA201591398A EA201591398A1 (en) | 2013-01-31 | 2013-12-24 | AC CURVE CIRCUIT AND AC CURRENT RECTIFIED CIRCUIT TO EXIT THE LED MODULE |
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|---|---|---|---|
| CN201210170323.6 | 2012-05-29 | ||
| CN201210170323 | 2012-05-29 | ||
| CN201310037188.2A CN103152914B (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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| CN201410809004.4A Division CN104540283B (en) | 2013-01-31 | 2013-01-31 | A kind of LED module as light source of illumination device |
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| CN201310037178.9A Active 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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| WO2014117607A1 (en) * | 2013-01-31 | 2014-08-07 | 四川新力光源股份有限公司 | Alternating current rectifying circuit and alternating current rectifying method for driving led module |
| MX340873B (en) | 2013-01-31 | 2016-07-27 | Sichuan Sunfor Light Co Ltd | Alternating current rectifying circuit and alternating current rectifying method for driving led module. |
| CN103702475B (en) * | 2013-12-03 | 2018-06-05 | 佛山市南海区联合广东新光源产业创新中心 | Reduce bridge-type phase shift-rectification circuit of stroboscopic |
| CN104053264A (en) * | 2014-06-30 | 2014-09-17 | 吴文武 | Circuit of LED lamp driver |
| CN105491731A (en) * | 2016-02-24 | 2016-04-13 | 深圳市益顺电子科技有限公司 | Constant-current high-voltage LED drive chip circuit and drive method thereof |
| JP2018040186A (en) * | 2016-09-08 | 2018-03-15 | アイシン精機株式会社 | Vehicle door handle device |
| CN109066642B (en) * | 2018-09-20 | 2024-04-05 | 江苏为恒智能科技有限公司 | High-precision bidirectional overvoltage hysteresis protection circuit |
| CN114578739A (en) * | 2022-03-15 | 2022-06-03 | 湖南省通达文电磁设备有限公司 | Direct-current voltage stabilizing circuit utilizing alternating-current trough energy and working method |
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| CN2131247Y (en) * | 1992-04-25 | 1993-04-28 | 上虞县灯泡总厂 | Power inverter with duplex rectification circuit |
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| JP3708345B2 (en) * | 1998-11-25 | 2005-10-19 | 株式会社エルテル | Light emitting element drive circuit |
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| CN2131247Y (en) * | 1992-04-25 | 1993-04-28 | 上虞县灯泡总厂 | Power inverter with duplex rectification circuit |
| 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 |
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| BR112015018358A2 (en) | 2017-07-18 |
| CN103152913A (en) | 2013-06-12 |
| CN103152913B (en) | 2015-01-28 |
| CN103152914A (en) | 2013-06-12 |
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