CN103152914A - 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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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 the AC rectification technology, relate in particular to AC rectification circuit and the AC rectification method of a kind of driving light-emitting diode (LED, Light Emitting Diode) module.
Background technology
Light-emitting diode (LED, Light Emitting Diode) module is as a kind of new light sources of high benefit, owing to having long, advantages such as energy consumption is low, energy-conserving and environment-protective of life-span, is widely used in the illumination of business, industry, family field.
During as light source of illumination device, the life-span of lighting device is not only depended on the luminescent properties of LED, also depends on the stability that the drive circuit of LED module operating voltage assembly is provided when LED module.In present application scheme, the bottleneck in LED module life-span remains the voltage stability that drive circuit provides.For the life-span impact on LED module of the fluctuation that reduces driving voltage, need to design brand-new AC rectification circuit based on the alternating current of existing extensive use, in order to stable driving voltage to be provided, thus the 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), can be for LED module provide comparatively stable voltage, thus useful life of LED module promoted.
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, alternating current is carried out rectification, direct driving LED module, referring to 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 the positive peak value and drops to from the positive peak value time period that null value experiences from null value; Negative half-cycle is that alternating current drops to the negative peak value and rises to from the negative peak value time period that null value experiences from null value.
At the positive half period of alternating current, the alternating current of alternating current module output forms current circuit, for the external LED module provides operating voltage by the first diode D1, external LED module and the 4th diode D4;
At the negative half period device of alternating current, the alternating current of alternating current module output forms another current circuit, for the external LED module provides operating voltage by the 3rd diode D3, external LED module and the second diode D2.
By as seen above-mentioned, the AC rectification circuit of existing driving LED module, alternating current is by after the rectification of diode, directly driving LED module work, because alternating current is cyclic fluctuation, and there is certain cut-in voltage in LED module, and when the voltage that namely only is carried in LED module two ends surpassed cut-in voltage, LED module was just understood conducting and luminous; Surpass cut-in voltage if be carried in the voltage at LED module two ends, LED module is in cut-off state, namely is in not luminance.Thereby existing AC rectification circuit when current circuit turns to, can offer the voltage of external LED module less than cut-in voltage, makes the luminous efficiency of LED module lower; Further, through the rectification of diode in the AC rectification circuit, the magnitude of voltage that exports LED module to fluctuates along with the alternating voltage fluctuation, and output voltage stability is lower, make LED module obvious scintillation occur, reduced 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, the luminous efficiency of lifting LED module.
Embodiments of the invention also provide a kind of AC rectification method of driving LED module, improve the stability of output voltage, the luminous efficiency of lifting 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 is used for when the alternating current module is in positive half cycle, and the alternating current that the alternating current module is exported carries out rectification, exports the voltage signal after rectification to outside LED module;
Positive half cycle feed leg is used for when the alternating current module is in negative half period, and the alternating current of exporting according to the alternating current module charges; When the alternating current module is in positive half cycle, discharge, the voltage signal of discharge is exported to the LED module of outside;
Negative half period rectification branch road is used for when the alternating current module is in negative half period, and the alternating current that the alternating current module is exported carries out rectification, exports the voltage signal after rectification to outside LED module;
The negative half period feed leg is used for when the alternating current module is in positive half cycle, and the alternating current of exporting according to the alternating current module charges; When the alternating current module is in negative half period, discharge, the voltage signal of discharge is exported to the LED module of outside.
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 an 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 an 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 the first electric capacity is connected with the positive pole of the 4th diode, and the other end is connected with an end of alternating current module;
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.
Preferably, described negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, wherein,
One end of the second electric capacity is connected with an end of alternating current module, and the other end is connected with the output of external LED module;
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.
Preferably, described rectifying tube is diode, triode or silicon controlled rectifier.
Preferably, described the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity adopt polarity free capacitor.
Preferably, described the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity have identical capacitance.
Preferably,
At the alternating current positive half period, electric current forms the loop through the second diode, the first diode, LED module, the 6th diode, to the LED module power supply, wherein,
At the alternating current voltage ascent stage, alternating current forms the loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Simultaneously, alternating current forms the loop by the second electric capacity and the 6th diode, is the second capacitor charging; Simultaneously, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form the loop, are the LED module power supply;
At the alternating current negative half-cycle, electric current forms the loop through the 5th diode, the 4th diode, LED module, the 3rd diode, to the LED module power supply, wherein,
At the absolute value of voltage ascent stage, the alternating current in the alternating current module forms the loop by the 5th diode and the first electric capacity, to the first capacitor charging; Simultaneously, alternating current forms the loop by the 4th electric capacity and the 3rd diode, to the 4th capacitor charging; Simultaneously, the second electric capacity, the 3rd electric capacity, the first diode and LED module form the loop, are the LED module power supply.
Preferably, described AC rectification circuit further comprises: 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 further comprises: 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 that drives the 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 the alternating current module was in positive half cycle, positive half cycle rectification branch road carried out rectification to the alternating current of alternating current module output, exports the voltage signal after rectification to outside LED module;
The negative half period feed leg is charged according to the alternating current of alternating current module output, and positive half cycle feed leg is discharged, and the voltage signal of discharge is exported to the LED module of outside;
When the alternating current module was in negative half period, negative half period rectification branch road carried out rectification to the alternating current of alternating current module output, exported the voltage signal after rectification to outside LED module;
The negative half period feed leg is discharged, and the voltage signal of discharge is exported to the LED module of outside, and positive half cycle feed leg is charged according to the alternating current of alternating current module output.
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 an 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 an 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 the first electric capacity is connected with the positive pole of the 4th diode, and the other end is connected with an end of alternating current module;
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.
Wherein, described negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, wherein,
One end of the second electric capacity is connected with an end of alternating current module, and the other end is connected with the output of external LED module;
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.
Wherein,
At the alternating current positive half period, electric current forms the loop through the second diode, the first diode, LED module, the 6th diode, to the LED module power supply, wherein,
At the alternating current voltage ascent stage, alternating current forms the loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Simultaneously, alternating current forms the loop by the second electric capacity and the 6th diode, is the second capacitor charging; Simultaneously, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form the loop, are the LED module power supply;
At the alternating current negative half-cycle, electric current forms the loop through the 5th diode, the 4th diode, LED module, the 3rd diode, to the LED module power supply, wherein,
At the absolute value of voltage ascent stage, the alternating current in the alternating current module forms the loop by the 5th diode and the first electric capacity, to the first capacitor charging; Simultaneously, alternating current forms the loop by the 4th electric capacity and the 3rd diode, to the 4th capacitor charging; Simultaneously, the second electric capacity, the 3rd electric capacity, the first diode and LED module form the loop, are the LED module power supply.
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, be used for when the alternating current module is in positive half cycle, the alternating current that the alternating current module is exported carries out rectification, exports the voltage signal after rectification to outside LED module; Positive half cycle feed leg is used for when the alternating current module is in negative half period, and the alternating current of exporting according to the alternating current module charges; When the alternating current module is in positive half cycle, discharge, the voltage signal of discharge is exported to the LED module of outside; Negative half period rectification branch road is used for when the alternating current module is in negative half period, and the alternating current that the alternating current module is exported carries out rectification, exports the voltage signal after rectification to outside LED module; The negative half period feed leg is used for when the alternating current module is in positive half cycle, and the alternating current of exporting according to the alternating current module charges; When the alternating current module is in negative half period, discharge, the voltage signal of discharge is exported to the LED module of outside.Like this, utilize the charge and discharge of electric capacity, on the circuit base of the direct driving LED module of existing alternating current, improved the stability of output voltage, improve the utilance of each half period of alternating current, increased the ON time of LED, reduced simultaneously the luminous fluctuation of LED, and guaranteed higher power factor, promoted the luminous efficiency of LED module.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art.Apparently, the accompanying drawing in below describing is only some embodiments of the present invention, for those of ordinary skills, can also obtain according to these accompanying drawing illustrated embodiments other embodiment and accompanying drawing thereof.
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 the 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
Below with reference to accompanying drawing, the technical scheme of various embodiments of the present invention is carried out clear, complete description, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills are resulting all other embodiment under the prerequisite of 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, thereby, when current circuit turns to, can offer the voltage of external LED module less than cut-in voltage, make the luminous efficiency of LED module lower; Further, through the rectification of diode in the AC rectification circuit, the magnitude of voltage that exports LED module to fluctuates along with the alternating voltage fluctuation, and output voltage stability is lower, affects the useful life of LED module.
In the embodiment of the present invention, shortcoming for the direct drive circuit of prior art alternating current, 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.Referring to 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 is used for when the alternating current module is in positive half cycle, and the alternating current that the alternating current module is exported carries out rectification, exports the voltage signal after rectification to outside LED module;
Positive half cycle feed leg is used for when the alternating current module is in negative half period, and the alternating current of exporting according to the alternating current module charges; Be used for discharging when the alternating current module is in positive half cycle, the voltage signal of discharge exported to the LED module of outside;
Negative half period rectification branch road is used for when the alternating current module is in negative half period, and the alternating current that the alternating current module is exported carries out rectification, exports the voltage signal after rectification to outside LED module;
The negative half period feed leg is used for when the alternating current module is in positive half cycle, and the alternating current of exporting according to the alternating current module charges; Be used for discharging when the alternating current module is in negative half period, the voltage signal of discharge exported to the LED module of outside.
In the embodiment of the present invention, outside LED module can be also other load blocks, for example, and the load that other need to be 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 an 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 an 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 capacitor C 1 and the 4th capacitor C 4(are not shown), wherein,
One end of the first capacitor C 1 is connected with the positive pole of the 4th diode D4, and the other end is connected with an end (A1) of alternating current module;
One end of the 4th capacitor C 4 is connected with the other end (A2) of alternating current module, and the other end is connected with the output of external LED module.
The negative half period feed leg comprises: the second capacitor C 2 and the 3rd capacitor C 3(are not shown), wherein,
One end of the second capacitor C 2 is connected with an end (A1) of alternating current module, and the other end is connected with the output of external LED module;
One end of the 3rd capacitor C 3 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, get final product so long as have the device of unilateal conduction characteristic, for example, silicon controlled rectifier etc.Preferably, adopt semiconductor rectifier diode, not only with low cost, and be convenient to that to carry out secondary integrated with LED module etc., the LED lighting device that being integrally formed alternating current directly drives.
Below take by rectifying tube as example as diode, 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.Referring to 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 capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the 5th capacitor C 5 and LED module, wherein
The positive pole of the second diode D2 is connected with an end (A1) of alternating current module (AC), and negative pole is connected with the anodal and end the 3rd capacitor C 3 of the first diode D1 respectively;
The negative pole of the first diode D1 is connected with the negative pole of the 4th diode D4, an end of the 5th capacitor C 5 and the input (V+) of LED module respectively;
The other end of the 3rd capacitor C 3 is connected with the other end of alternating current (A2);
The positive pole of the 4th diode D4 is connected with the negative pole of the 5th diode D5 and an end of the first capacitor C 1 respectively;
The other end of the first capacitor C 1 is connected with an end of alternating current;
The positive pole of the 5th diode D5 is connected with the negative pole of the 6th diode D6, an end of the 4th capacitor C 4 and the other end of alternating current respectively;
The negative pole of the 3rd diode D3 is connected with an end of the second capacitor C 2 and an end of alternating current respectively;
The output of LED module (V-) is connected with the positive pole of the 3rd diode D3, the other end of the second capacitor C 2, the other end of the 4th capacitor C 4, the anodal and other end the 5th capacitor C 5 of the 6th diode D6 respectively.
In the embodiment of the present invention, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 are operated in exchange status, need to bear reverse voltage, preferably, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 all adopt polarity free capacitor, to adapt to the alternate current operation environment.The ac voltage withstanding value of polarity free capacitor should greater than or equal at least the AC-input voltage value.
Preferably, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 have identical or close capacitance.
The operation principle of embodiment of the present invention circuit is described below:
At the alternating current positive half period, electric current forms the loop through the second diode D2, the first diode D1, LED module, the 6th diode D6, powers to LED module.Wherein,
At the alternating current voltage ascent stage, alternating current forms the loop by the second diode D2 and the 3rd capacitor C 3, is the 3rd capacitor C 3 chargings; Simultaneously, alternating current forms the loop by the second capacitor C 2 and the 6th diode D6, is the second capacitor C 2 chargings; Simultaneously, the 4th capacitor C 4, the first capacitor C 1, the 4th diode D4 and LED module form the loop, are the LED module power supply, the electric charge of namely storing in the first capacitor C 1 and the 4th capacitor C 4, through the 4th diode D4, to LED module discharge, thereby provide operating voltage for LED module.
In the embodiment of the present invention, at the alternating current voltage ascent stage, the second capacitor C 2, the 3rd capacitor C 3 are relation in parallel on circuit structure; The first capacitor C 1, the 4th capacitor C 4 are series relationship with the alternating current module on circuit structure, be the LED module power supply, be equivalent to when the initial power supply of alternating current module or switching positive and negative half period, increased the voltage of alternating current, make the LED module can shorting advance, thereby promote the quality factor of circuit, and improved output voltage stability, promoted the luminous efficiency of LED module, the useful life of also having improved LED module.
At the alternating current negative half-cycle, electric current forms the loop through the 5th diode D5, the 4th diode D4, LED module, the 3rd diode D3, powers to LED module.Wherein,
At the absolute value of voltage ascent stage, the alternating current in the alternating current module forms the loop by the 5th diode D5 and the first capacitor C 1, to the first capacitor C 1 charging; Simultaneously, alternating current forms the loop by the 4th capacitor C 4 and the 3rd diode D3, to the 4th capacitor C 4 chargings; Simultaneously, the second capacitor C 2, the 3rd capacitor C 3, the first diode D1 and LED module form the loop, are the LED module power supply, the electric charge of namely storing in the second capacitor C 2, the 3rd capacitor C 3, by the first diode D1, to LED module discharge, thereby 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 capacitor C 1, the 4th capacitor C 4 are relation in parallel on circuit structure; The second capacitor C 2, the 3rd capacitor C 3 are series relationship with the alternating current module on circuit structure, are equivalent to when alternating current switches, and increase the absolute value of voltage of alternating current, make the LED module can shorting advance.
In the embodiment of the present invention, by the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3 and the 4th capacitor C 4 discharging and recharging that alternating current positive half period and alternating current negative half-cycle replace, make the magnitude of voltage that exports LED module to comparatively stable, reduced the flicker frequency when LED module is luminous; Simultaneously, increase the ON time of LED module in alternating current positive half period and alternating current negative half-cycle, reduced the luminous fluctuation of LED module, and improved 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 directly lighting device of the LED module of driving of alternating current.
In practical application, in order to guarantee can not 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, be that diode parameters in each branch road should be identical or close, each electric capacity also should have identical or close capacitance, and for example, 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 the negative half period feed leg.
In the embodiment of the present invention, select the identical or close electric capacity of parameter, beneficial for improving electric balance, be conducive to equally balanced load, reduce flicker and improve power-efficient.In the embodiment of the present invention, be mainly the charge-discharge characteristic that utilizes electric capacity, thereby electric capacity (capacitance) parameter is most important parameter, selects the identical or close electric capacity of electric capacity, charge-discharge characteristic just can reach identical or close basically.
Preferably, in order further to improve the stability of the voltage signal that exports LED module to, the AC rectification circuit of the driving LED module of the embodiment of the present invention further comprises current regulator diode (CRD, Current Regulative Diode).
Fig. 4 is another concrete structure schematic diagram of AC rectification circuit of embodiment of the present invention driving LED module.Referring to Fig. 4, different from Fig. 3 is, further comprises current regulator diode (CRD, Current Regulative Diode), and 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, be used for current limliting by increase a current regulator diode in DC loop, make the luminous efficiency of LED module that very large lifting be arranged.
In Fig. 3, although the embodiment of the present invention can solve the fluctuation problem of LED module light output to a certain extent, the alternating current trough is filled up degree little, at alternating voltage trough place, the output of LED module light only has 30%～40% of crest place's light output.
Thus, provide a kind of preferred version of the present invention, as shown in Figure 5.
Fig. 5 is the AC rectification circuit concrete structure schematic diagram again of embodiment of the present invention driving LED module.Referring to Fig. 5, different from Fig. 4 is, on basic circuit of the present invention basis, has increased by an electrochemical capacitor C5 as filter capacitor, and 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 that flows into LED module more level and smooth, although sacrificed some power factors, but LED module can reach more than 80% of crest time output in the light output at alternating voltage trough place, almost there is no difference on sense organ.
Fig. 6 is the AC rectification method flow schematic diagram of embodiment of the present invention driving LED module.Referring to 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:
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 an 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.
In this step, the negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, wherein,
One end of the second electric capacity is connected with an end of alternating current module, and the other end is connected with the output of external LED module;
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.
Positive half cycle feed leg comprises: the first electric capacity and the 4th electric capacity, 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 an end of alternating current module;
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.
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 an 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.
Like this, in the embodiment of the present invention, at the alternating current positive half period, electric current forms the loop through the second diode, the first diode, LED module, the 6th diode, to the LED module power supply, wherein,
At the alternating current voltage ascent stage, alternating current forms the loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Simultaneously, alternating current forms the loop by the second electric capacity and the 6th diode, is the second capacitor charging; Simultaneously, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form the loop, are the LED module power supply;
At the alternating current negative half-cycle, electric current forms the loop through the 5th diode, the 4th diode, LED module, the 3rd diode, to the LED module power supply, wherein,
At the absolute value of voltage ascent stage, the alternating current in the alternating current module forms the loop by the 5th diode and the first electric capacity, to the first capacitor charging; Simultaneously, alternating current forms the loop by the 4th electric capacity and the 3rd diode, to the 4th capacitor charging; Simultaneously, the second electric capacity, the 3rd electric capacity, the first diode and LED module form the loop, are the LED module power supply.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and within modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also comprises these changes and modification interior.
Claims (17)
1. an AC rectification circuit that drives the LED module, 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 is used for when the alternating current module is in positive half cycle, and the alternating current that the alternating current module is exported carries out rectification, exports the voltage signal after rectification to outside LED module;
Positive half cycle feed leg is used for when the alternating current module is in negative half period, and the alternating current of exporting according to the alternating current module charges; When the alternating current module is in positive half cycle, discharge, the voltage signal of discharge is exported to the LED module of outside;
Negative half period rectification branch road is used for when the alternating current module is in negative half period, and the alternating current that the alternating current module is exported carries out rectification, exports the voltage signal after rectification to outside LED module;
The negative half period feed leg is used for when the alternating current module is in positive half cycle, and the alternating current of exporting according to the alternating current module charges; When the alternating current module is in negative half period, discharge, the voltage signal of discharge is exported to the LED module of outside.
2. AC rectification circuit according to claim 1, is characterized in that, 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 an 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.
3. AC rectification circuit according to claim 2, is characterized in that, 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 an 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.
4. AC rectification circuit according to claim 3, is characterized in that, described positive half cycle feed leg comprises: the first electric capacity and the 4th electric capacity, 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 an end of alternating current module;
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.
5. AC rectification circuit according to claim 4, is characterized in that, described negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, wherein,
One end of the second electric capacity is connected with an end of alternating current module, and the other end is connected with the output of external LED module;
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.
6. the described AC rectification circuit of according to claim 1 to 5 any one, is characterized in that, described rectifying tube is diode, triode or silicon controlled rectifier.
7. AC rectification circuit according to claim 6, is characterized in that, described the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity adopt polarity free capacitor.
8. AC rectification circuit according to claim 7, is characterized in that, described the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity have identical capacitance.
9. AC rectification circuit according to claim 7, is characterized in that,
At the alternating current positive half period, electric current forms the loop through the second diode, the first diode, LED module, the 6th diode, to the LED module power supply, wherein,
At the alternating current voltage ascent stage, alternating current forms the loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Simultaneously, alternating current forms the loop by the second electric capacity and the 6th diode, is the second capacitor charging; Simultaneously, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form the loop, are the LED module power supply;
At the alternating current negative half-cycle, electric current forms the loop through the 5th diode, the 4th diode, LED module, the 3rd diode, to the LED module power supply, wherein,
At the absolute value of voltage ascent stage, the alternating current in the alternating current module forms the loop by the 5th diode and the first electric capacity, to the first capacitor charging; Simultaneously, alternating current forms the loop by the 4th electric capacity and the 3rd diode, to the 4th capacitor charging; Simultaneously, the second electric capacity, the 3rd electric capacity, the first diode and LED module form the loop, are the LED module power supply.
10. AC rectification circuit according to claim 9, is characterized in that, described AC rectification circuit further comprises: 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.
11. AC rectification circuit according to claim 10 is characterized in that, described AC rectification circuit further comprises: 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.
12. AC rectification method that drives the 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 the alternating current module was in positive half cycle, positive half cycle rectification branch road carried out rectification to the alternating current of alternating current module output, exports the voltage signal after rectification to outside LED module;
The negative half period feed leg is charged according to the alternating current of alternating current module output, and positive half cycle feed leg is discharged, and the voltage signal of discharge is exported to the LED module of outside;
When the alternating current module was in negative half period, negative half period rectification branch road carried out rectification to the alternating current of alternating current module output, exported the voltage signal after rectification to outside LED module;
The negative half period feed leg is discharged, and the voltage signal of discharge is exported to the LED module of outside, and positive half cycle feed leg is charged according to the alternating current of alternating current module output.
13. AC rectification method according to claim 12, 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 an 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.
14. AC rectification method according to claim 13, 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 an 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.
15. AC rectification method according to claim 14, wherein, described positive half cycle feed leg comprises: the first electric capacity and the 4th electric capacity, 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 an end of alternating current module;
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.
16. AC rectification method according to claim 15, wherein, described negative half period feed leg comprises: the second electric capacity and the 3rd electric capacity, wherein,
One end of the second electric capacity is connected with an end of alternating current module, and the other end is connected with the output of external LED module;
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.
17. AC rectification method according to claim 16, wherein,
At the alternating current positive half period, electric current forms the loop through the second diode, the first diode, LED module, the 6th diode, to the LED module power supply, wherein,
At the alternating current voltage ascent stage, alternating current forms the loop by the second diode and the 3rd electric capacity, is the 3rd capacitor charging; Simultaneously, alternating current forms the loop by the second electric capacity and the 6th diode, is the second capacitor charging; Simultaneously, the 4th electric capacity, the first electric capacity, the 4th diode and LED module form the loop, are the LED module power supply;
At the alternating current negative half-cycle, electric current forms the loop through the 5th diode, the 4th diode, LED module, the 3rd diode, to the LED module power supply, wherein,
At the absolute value of voltage ascent stage, the alternating current in the alternating current module forms the loop by the 5th diode and the first electric capacity, to the first capacitor charging; Simultaneously, alternating current forms the loop by the 4th electric capacity and the 3rd diode, to the 4th capacitor charging; Simultaneously, the second electric capacity, the 3rd electric capacity, the first diode and LED module form the loop, are the LED module power supply.
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 |
| EA201591398A EA201591398A1 (en) | 2013-01-31 | 2013-12-24 | AC CURVE CIRCUIT AND AC CURRENT RECTIFIED CIRCUIT TO EXIT THE 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 |
| EP13873234.2A EP2953429A4 (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 |
| PCT/CN2013/090330 WO2014117607A1 (en) | 2013-01-31 | 2013-12-24 | Alternating current rectifying circuit and alternating current rectifying method for driving 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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| CN201310037188.2A Active 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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| CN103702475A (en) * | 2013-12-03 | 2014-04-02 | 张涛 | Bridge type phase shifting-rectifying circuit with function of reducing stroboflash |
| WO2014117606A1 (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 |
| 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 |
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| 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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| WO2014117606A1 (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 |
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Also Published As
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| CN103152913B (en) | 2015-01-28 |
| CN103152914B (en) | 2015-01-28 |
| CN103152913A (en) | 2013-06-12 |
| BR112015018358A2 (en) | 2017-07-18 |
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Address after: 610046 No. 360, Wukexi Five Road, Chengdu City, Sichuan Province Patentee after: Sichuan energy investment intelligent photoelectric Co., Ltd Address before: 610046 No. 360, Wukexi Five Road, Chengdu City, Sichuan Province Patentee before: SICHUAN NENGTOU BOZHONG WISDOM LIGHTING INVESTMENT Co.,Ltd. |