CN104540283B - A kind of LED module as light source of illumination device - Google Patents
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Abstract
nullThe invention discloses a kind of LED module as light source of illumination device，LED module includes drive circuit，Wherein，The positive pole of the second diode respectively with the negative pole of the 3rd diode、One end of alternating current、One end of first electric capacity and one end of the second electric capacity are connected，Negative pole is connected with the positive pole of the first diode and one end of the 3rd electric capacity respectively，The positive pole of the 5th diode respectively with the negative pole of the 6th diode、The other end of alternating current、The other end of the 3rd electric capacity and one end of the 4th electric capacity are connected，Negative pole is connected with the other end of the first electric capacity and the anode of the 4th diode respectively，The negative pole of the first diode is connected with the negative pole of the 4th diode and the input of LED module respectively，The outfan of LED module respectively with the positive pole of the 3rd diode、The other end of the second electric capacity、The other end of the 4th electric capacity and the positive pole of the 6th diode are connected.The application present invention, can improve the stability of output voltage, promote the luminous efficiency of LED module.
Description
The invention is a divisional application with original application number of 201310037188.2, original application date of 2013, 31.01.3, and original name of the invention of an alternating current rectification circuit and an alternating current rectification method for driving an LED module.
Technical Field
The invention relates to the field of LED illumination, in particular to an LED module used as a light source of an illumination device.
Background
As a new Light source with high efficiency, a Light Emitting Diode (LED) module has the advantages of long service life, low energy consumption, energy saving, environmental protection, and the like, and is widely used for illumination in the fields of business, industry, and home.
When an LED module is used as a light source of a lighting device, the lifetime of the lighting device depends not only on the light emitting properties of the LED, but also on the stability of the driving circuit components that provide the operating voltage of the LED module. In current applications, the bottleneck in the lifetime of the LED module is still the voltage stability provided by the driver circuit. In order to reduce the influence of the fluctuation of the driving voltage on the service life of the LED module, a new ac rectification circuit needs to be designed based on the existing widely used ac power to provide a stable driving voltage to drive the LED module.
Bridge rectifier circuit adopts semiconductor rectifier diode (or called diode) to connect into simple rectifier circuit, and the wide application is in the steady voltage of various alternating current-direct current conversions is used, through bridge rectifier circuit, becomes Direct Current (DC) with Alternating Current (AC) rectification, can provide comparatively stable voltage for the LED module to promote the life of LED module.
Fig. 1 is a schematic diagram of an ac rectifier circuit for driving an LED module in the prior art. Connect the LED module at AC rectifier circuit's direct current output, through this AC rectifier circuit, carry out the rectification to the alternating current, can the direct drive LED module, see figure 1, this AC rectifier circuit is bridge rectifier circuit, includes: an alternating current module (AC), a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4, wherein,
the anode of the first diode D1 is connected to the cathode of the second diode D2, and the cathodes thereof are respectively connected to the cathode of the third diode D3 and the input terminal (V +) of the external LED module;
the anode of the second diode D2 is connected to the anode of the fourth diode D4 and to the output (V-) of the external LED module, respectively;
the anode of the third diode D3 is connected with the cathode of the fourth diode D4;
one end (a1) of the ac module is connected to the anode of the first diode D1, and the other end (a2) is connected to the anode of the second diode D2.
The period of the alternating current includes: a positive half cycle and a negative half cycle, wherein the positive half cycle is a time period that the alternating current goes up from a zero value to a positive peak value and down from the positive peak value to the zero value; a negative half cycle is the period of time that the alternating current goes down from zero to a negative peak value and up from the negative peak value to zero.
In the positive half period of the alternating current, the alternating current output by the alternating current module passes through the first diode D1, the external LED module and the fourth diode D4 to form a current loop to provide working voltage for the external LED module;
in the negative half cycle of the alternating current, the alternating current output by the alternating current module forms another current loop through the third diode D3, the external LED module and the second diode D2 to provide the working voltage for the external LED module.
As can be seen from the above, in the conventional alternating current rectifying circuit for driving the LED module, alternating current is rectified by the diode and then directly drives the LED module to operate, and since the alternating current is periodically fluctuated, the LED module has a certain turn-on voltage, that is, only when the voltage loaded at two ends of the LED module exceeds the turn-on voltage, the LED module is turned on and emits light; if the voltage across the LED module does not exceed the turn-on voltage, the LED module is in a turn-off state, i.e. in a non-emitting state. Therefore, when a current loop is turned, the voltage which can be provided for an external LED module by the conventional alternating current rectification circuit is smaller than a starting voltage, so that the luminous efficiency of the LED module is lower; further, through rectification of a diode in the alternating current rectification circuit, the voltage value output to the LED module fluctuates along with fluctuation of alternating current voltage, the stability of the output voltage is low, the LED module obviously flickers, and the service life of the LED module is shortened.
Chinese patent application publication No. CN101329044A discloses an LED light-emitting device with an integrated driving circuit, which includes at least one LED chip, one end of which is connected to a driving output terminal of the driving circuit, and the LED chip, the driving circuit and a package body are integrally packaged to form the LED light-emitting device with the integrated driving circuit, and pins of the LED light-emitting device are at least partially embedded in the package body.
Chinese patent application publication No. CN102368881A discloses a constant current driving system for LED lamps, which includes a voltage-doubling rectifying circuit and a constant current control circuit, wherein an input end of the voltage-doubling rectifying circuit is connected to a dc input voltage or an ac input voltage via an LC circuit, the LC circuit includes an inductor L and a capacitor C1, the other end of the inductor L is connected to a first input end of the voltage-doubling rectifying circuit, a capacitor C1 is connected in parallel between the first input end and a second input end of the voltage-doubling rectifying circuit, an output end of the voltage-doubling rectifying circuit is connected to an input end of the constant current control circuit, the voltage-doubling rectifying circuit includes a capacitor C2, a capacitor C3, an electrolytic capacitor C4, a diode D1, a diode D2, a diode D3, and a diode D4.
The working principle of the comparison file is that when the input of the system is supplied with power by alternating current, the input power supply is optimized and adjusted through the voltage doubling rectifying circuit, the capacitor is charged in the voltage doubling rectifying circuit, the voltage doubling rectifying circuit is realized through a plurality of periods, the stability of the power supply voltage is improved, the compatibility of alternating current and direct current power supply is realized, the input power supply is optimized and adjusted by using very few components, the input of the electronic transformer is efficiently matched through the LC resonance circuit, and the input of the electronic transformer can be efficiently matched.
The comparison document has the disadvantages that when the direction of the input current is changed, the LED module cannot be conducted due to the fact that the input voltage is low and cannot reach the conduction voltage required by the LED module, the luminous efficiency is reduced, and an obvious flicker phenomenon occurs.
The driving circuit for directly driving the LED module by the alternating current can increase the conduction time of the LED module and reduce the flickering phenomenon of the LED, and provides a technical scheme completely different from the comparison file. The above mentioned comparison document does not disclose the technical scheme of the present invention for conducting the LED in advance through the positive and negative half-cycle feeding branches, and the skilled in the art does not easily think that "the conduction angle of the LED assembly is increased through the positive and negative half-cycle feeding branches to improve the light emitting efficiency and the power utilization rate" in the present invention according to the technical features disclosed in the comparison document.
Disclosure of Invention
The embodiment of the invention provides an alternating current rectifying circuit for driving an LED module, which improves the stability of output voltage and the luminous efficiency of the LED module.
The embodiment of the invention also provides an alternating current rectification method for driving the LED module, so that the stability of output voltage is improved, and the luminous efficiency of the LED module is improved.
In order to achieve the above object, an embodiment of the present invention provides an ac rectifier circuit for driving an LED module, including: an AC module, a positive half-cycle rectifying branch, a positive half-cycle feeding branch, a negative half-cycle rectifying branch and a negative half-cycle feeding branch,
the positive half-cycle rectification branch circuit is used for rectifying alternating current output by the alternating current module when the alternating current module is in the positive half cycle and outputting a rectified voltage signal to an external LED module;
the positive half-cycle feed branch is used for charging according to the alternating current output by the alternating current module when the alternating current module is in the negative half cycle; when the alternating current module is in the positive half cycle, discharging is carried out, and a discharged voltage signal is output to the external LED module;
the negative half-cycle rectification branch circuit is used for rectifying alternating current output by the alternating current module when the alternating current module is in a negative half cycle and outputting a rectified voltage signal to an external LED module;
the negative half-cycle feed branch is used for charging according to the alternating current output by the alternating current module when the alternating current module is in the positive half cycle; when the alternating current module is in the negative half cycle, discharging is carried out, and a discharged voltage signal is output to the external LED module.
Preferably, the positive half-cycle rectifying branch comprises: a first rectifying tube, a second rectifying tube and a sixth rectifying tube, wherein,
the anode of the second rectifier tube is connected with one end of the alternating current module, and the cathode of the second rectifier tube is connected with the anode of the first rectifier tube;
the cathode of the first rectifier tube is connected with the input end of the external LED module;
and the anode of the sixth rectifier tube is connected with the output end of the external LED module, and the cathode of the sixth rectifier tube is connected with the other end of the alternating current module.
Preferably, the negative half-cycle rectifying branch comprises: a third rectifying tube, a fourth rectifying tube and a fifth rectifying tube, wherein,
the negative electrode of the third rectifier tube is connected with one end of the alternating current module, and the positive electrode of the third rectifier tube is connected with the output end of the external LED module;
the positive electrode of the fifth rectifying tube is connected with the other end of the alternating current module, and the negative electrode of the fifth rectifying tube is connected with the positive electrode of the fourth rectifying tube;
and the cathode of the fourth rectifier tube is connected with the input end of the external LED module.
Preferably, the positive half-cycle feed branch includes: a first capacitor and a fourth capacitor, wherein,
one end of the first capacitor is connected with the anode of the fourth diode, and the other end of the first capacitor is connected with one end of the alternating current module;
one end of the fourth capacitor is connected with the other end of the alternating current module, and the other end of the fourth capacitor is connected with the output end of the external LED module.
Preferably, the negative half-cycle feed branch comprises: a second capacitor, and a third capacitor, wherein,
one end of the second capacitor is connected with one end of the alternating current module, and the other end of the second capacitor is connected with the output end of the external LED module;
one end of the third capacitor is connected with the anode of the first rectifying tube, and the other end of the third capacitor is connected with the other end of the alternating current module.
Preferably, the rectifier tube is a diode, a triode or a silicon controlled rectifier.
Preferably, the first capacitor, the second capacitor, the third capacitor and the fourth capacitor are nonpolar capacitors.
Preferably, the first capacitor, the second capacitor, the third capacitor and the fourth capacitor have the same capacitance value.
Preferably, the first and second liquid crystal films are made of a polymer,
in the positive half cycle of the alternating current, the current forms a loop through the second diode, the first diode, the LED module and the sixth diode to supply power to the LED module, wherein,
in the step of rising the alternating current voltage, the alternating current forms a loop through the second diode and the third capacitor to charge the third capacitor; meanwhile, the alternating current forms a loop through the second capacitor and the sixth diode to charge the second capacitor; meanwhile, the fourth capacitor, the first capacitor, the fourth diode and the LED module form a loop to supply power to the LED module;
in the negative half period of the alternating current, the current forms a loop through the fifth diode, the fourth diode, the LED module and the third diode to supply power to the LED module, wherein,
in the stage of voltage absolute value rising, alternating current in the alternating current module forms a loop through a fifth diode and the first capacitor to charge the first capacitor; meanwhile, the alternating current forms a loop through the fourth capacitor and the third diode to charge the fourth capacitor; meanwhile, the second capacitor, the third capacitor, the first diode and the LED module form a loop to supply power to the LED module.
Preferably, the alternating current rectifier circuit further includes: a constant current diode (D) for supplying current to the load,
and the anode of the constant current diode is connected with the output end of the LED module, and the cathode of the constant current diode is connected with the anode of the third diode.
Preferably, the alternating current rectifier circuit further includes: the electrolytic capacitor is provided with a capacitor,
and the anode of the electrolytic capacitor is connected with the input end of the LED module, and the cathode of the electrolytic capacitor is connected with the output end of the LED module.
An alternating current rectifying method for driving a Light Emitting Diode (LED) module, the LED module being driven by an alternating current rectifying circuit comprising: alternating current module, positive half cycle rectification branch, positive half cycle feed branch, negative half cycle rectification branch and negative half cycle feed branch, this method includes:
when the alternating current module is in the positive half cycle, the positive half cycle rectification branch circuit rectifies alternating current output by the alternating current module and outputs a rectified voltage signal to an external LED module;
the negative half-cycle feed branch circuit is charged according to the alternating current output by the alternating current module, and the positive half-cycle feed branch circuit is discharged to output a discharged voltage signal to an external LED module;
when the alternating current module is in the negative half cycle, the negative half cycle rectification branch circuit rectifies alternating current output by the alternating current module and outputs a rectified voltage signal to an external LED module;
the negative half-cycle feed branch circuit discharges, a discharged voltage signal is output to an external LED module, and the positive half-cycle feed branch circuit charges according to alternating current output by the alternating current module.
Wherein, the positive half cycle rectification branch comprises: a first rectifying tube, a second rectifying tube and a sixth rectifying tube, wherein,
the anode of the second rectifier tube is connected with one end of the alternating current module, and the cathode of the second rectifier tube is connected with the anode of the first rectifier tube;
the cathode of the first rectifier tube is connected with the input end of the external LED module;
and the anode of the sixth rectifier tube is connected with the output end of the external LED module, and the cathode of the sixth rectifier tube is connected with the other end of the alternating current module.
Wherein the negative half cycle rectifying branch comprises: a third rectifying tube, a fourth rectifying tube and a fifth rectifying tube, wherein,
the negative electrode of the third rectifier tube is connected with one end of the alternating current module, and the positive electrode of the third rectifier tube is connected with the output end of the external LED module;
the positive electrode of the fifth rectifying tube is connected with the other end of the alternating current module, and the negative electrode of the fifth rectifying tube is connected with the positive electrode of the fourth rectifying tube;
and the cathode of the fourth rectifier tube is connected with the input end of the external LED module.
Wherein the positive half-cycle feed branch comprises: a first capacitor and a fourth capacitor, wherein,
one end of the first capacitor is connected with the anode of the fourth diode, and the other end of the first capacitor is connected with one end of the alternating current module;
one end of the fourth capacitor is connected with the other end of the alternating current module, and the other end of the fourth capacitor is connected with the output end of the external LED module.
Wherein the negative half-cycle feed branch comprises: a second capacitor, and a third capacitor, wherein,
one end of the second capacitor is connected with one end of the alternating current module, and the other end of the second capacitor is connected with the output end of the external LED module;
one end of the third capacitor is connected with the anode of the first rectifying tube, and the other end of the third capacitor is connected with the other end of the alternating current module.
Wherein,
in the positive half cycle of the alternating current, the current forms a loop through the second diode, the first diode, the LED module and the sixth diode to supply power to the LED module, wherein,
in the step of rising the alternating current voltage, the alternating current forms a loop through the second diode and the third capacitor to charge the third capacitor; meanwhile, the alternating current forms a loop through the second capacitor and the sixth diode to charge the second capacitor; meanwhile, the fourth capacitor, the first capacitor, the fourth diode and the LED module form a loop to supply power to the LED module;
in the negative half period of the alternating current, the current forms a loop through the fifth diode, the fourth diode, the LED module and the third diode to supply power to the LED module, wherein,
in the stage of voltage absolute value rising, alternating current in the alternating current module forms a loop through a fifth diode and the first capacitor to charge the first capacitor; meanwhile, the alternating current forms a loop through the fourth capacitor and the third diode to charge the fourth capacitor; meanwhile, the second capacitor, the third capacitor, the first diode and the LED module form a loop to supply power to the LED module.
As can be seen from the foregoing technical solutions, an ac rectification circuit and an ac rectification method for driving an LED module according to embodiments of the present invention include: the power supply comprises an alternating current module, a positive half-cycle rectification branch, a positive half-cycle feed branch, a negative half-cycle rectification branch and a negative half-cycle feed branch, wherein the positive half-cycle rectification branch is used for rectifying alternating current output by the alternating current module when the alternating current module is in the positive half cycle and outputting rectified voltage signals to an external LED module; the positive half-cycle feed branch is used for charging according to the alternating current output by the alternating current module when the alternating current module is in the negative half cycle; when the alternating current module is in the positive half cycle, discharging is carried out, and a discharged voltage signal is output to the external LED module; the negative half-cycle rectification branch circuit is used for rectifying alternating current output by the alternating current module when the alternating current module is in a negative half cycle and outputting a rectified voltage signal to an external LED module; the negative half-cycle feed branch is used for charging according to the alternating current output by the alternating current module when the alternating current module is in the positive half cycle; when the alternating current module is in the negative half cycle, discharging is carried out, and a discharged voltage signal is output to the external LED module. Therefore, by utilizing the charging and discharging of the capacitor, on the basis of the circuit of the existing alternating current direct drive LED module, the stability of output voltage is improved, the utilization rate of each half period of the alternating current is improved, the conduction time of the LED is increased, the light emitting fluctuation of the LED is reduced, the higher power factor is ensured, and the light emitting efficiency of the LED module is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other embodiments and drawings may be devised by those skilled in the art based on the exemplary embodiments shown in the drawings.
Fig. 1 is a schematic diagram of an ac rectifier circuit for driving an LED module in the prior art.
Fig. 2 is a schematic diagram of an ac rectifying circuit for driving an LED module according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a specific structure of an ac rectifying circuit for driving an LED module according to an embodiment of the present invention.
Fig. 4 is another specific structural diagram of an ac rectifying circuit for driving an LED module according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of another specific structure of an ac rectifying circuit for driving an LED module according to an embodiment of the present invention.
Fig. 6 is a schematic flow chart of an ac power rectification method for driving an LED module according to an embodiment of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the conventional alternating current rectifying circuit for driving the LED module, because alternating current is periodically fluctuated, and the LED module has a certain starting voltage, when a current loop is turned, the voltage which can be provided for the external LED module is less than the starting voltage, so that the luminous efficiency of the LED module is low; further, through rectification of a diode in the alternating current rectification circuit, a voltage value output to the LED module fluctuates along with fluctuation of alternating current voltage, stability of the output voltage is low, and service life of the LED module is affected.
In the embodiment of the invention, aiming at the defects of the alternating current direct drive circuit in the prior art, the drive circuit for the alternating current direct drive LED module is provided, and the drive current is provided for the LED module, namely, the conduction angle is increased by utilizing the charging and discharging of a capacitor, and the wave troughs of the alternating current are filled, so that the power supply efficiency is improved, and the LED light-emitting flicker phenomenon is reduced.
Fig. 2 is a schematic diagram of an ac rectifying circuit for driving an LED module according to an embodiment of the present invention. Referring to fig. 2, the alternating current rectification circuit includes: an AC module, a positive half-cycle rectifying branch, a positive half-cycle feeding branch, a negative half-cycle rectifying branch and a negative half-cycle feeding branch,
the positive half-cycle rectification branch circuit is used for rectifying alternating current output by the alternating current module when the alternating current module is in the positive half cycle and outputting a rectified voltage signal to an external LED module;
the positive half-cycle feed branch is used for charging according to the alternating current output by the alternating current module when the alternating current module is in the negative half cycle; the LED module is used for discharging when the alternating current module is in the positive half cycle and outputting a discharged voltage signal to the outside;
the negative half-cycle rectification branch circuit is used for rectifying alternating current output by the alternating current module when the alternating current module is in a negative half cycle and outputting a rectified voltage signal to an external LED module;
the negative half-cycle feed branch is used for charging according to the alternating current output by the alternating current module when the alternating current module is in the positive half cycle; and the LED module is used for discharging when the alternating current module is in the negative half cycle and outputting a discharged voltage signal to the outside.
In the embodiment of the present invention, the external LED module may also be other load modules, for example, other loads that need to be under a stable operating voltage.
Wherein, positive half cycle rectification branch road includes: a first rectifier tube D1, a second rectifier tube D2, and a sixth rectifier tube D6 (not shown), wherein,
the anode of the second rectifier tube D2 is connected with one end (A1) of the alternating current module, and the cathode is connected with the anode of the first rectifier tube D1;
the cathode of the first rectifier tube D1 is connected with the input end of the external LED module;
the anode of the sixth rectifier tube D6 is connected to the output end of the external LED module, and the cathode is connected to the other end (a2) of the ac module.
The negative half-cycle rectification branch comprises: a third rectifier tube D3, a fourth rectifier tube D4, and a fifth rectifier tube D5 (not shown), wherein,
the negative electrode of the third rectifier tube D3 is connected with one end (A1) of the alternating current module, and the positive electrode of the third rectifier tube D3 is connected with the output end of the external LED module;
the positive electrode of the fifth rectifying tube D5 is connected with the other end (A2) of the alternating current module, and the negative electrode of the fifth rectifying tube D4 is connected with the positive electrode of the fourth rectifying tube D4;
and the cathode of the fourth rectifying tube D4 is connected with the input end of the external LED module.
The positive half-cycle feed branch comprises: a first capacitor C1 and a fourth capacitor C4 (not shown), wherein,
one end of the first capacitor C1 is connected to the anode of the fourth diode D4, and the other end is connected to one end (a1) of the ac electrical module;
one end of the fourth capacitor C4 is connected to the other end (a2) of the ac module, and the other end is connected to the output end of the external LED module.
The negative half-cycle feed branch comprises: a second capacitor C2, and a third capacitor C3 (not shown), wherein,
one end of the second capacitor C2 is connected with one end (A1) of the alternating current module, and the other end is connected with the output end of the external LED module;
one end of the third capacitor C3 is connected to the positive electrode of the first rectifier tube D1, and the other end is connected to the other end (a2) of the ac module.
Preferably, the rectifier may be a diode or a triode, as long as the device has a unidirectional conductive characteristic, for example, a silicon controlled rectifier. Preferably, the semiconductor rectifier diode is adopted, so that the cost is low, secondary integration with an LED module and the like is facilitated, and the integrated LED lighting device directly driven by alternating current is formed.
The following describes embodiments of the present invention in detail by taking a rectifier as an example of a diode.
Fig. 3 is a schematic diagram of a specific structure of an ac rectifying circuit for driving an LED module according to an embodiment of the present invention. Referring to fig. 3, the alternating current rectifying circuit for driving the LED module includes: a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and an LED module, wherein,
the anode of the second diode D2 is connected to one end (a1) of the alternating current module (AC), and the cathode is connected to the anode of the first diode D1 and one end of the third capacitor C3, respectively;
the cathode of the first diode D1 is respectively connected with the cathode of the fourth diode D4 and the input end (V +) of the LED module;
the other end of the third capacitor C3 is connected with the other end (A2) of the alternating current;
the anode of the fourth diode D4 is connected to the cathode of the fifth diode D5 and one end of the first capacitor C1, respectively;
the other end of the first capacitor C1 is connected with one end of alternating current;
the anode of the fifth diode D5 is connected to the cathode of the sixth diode D6, one end of the fourth capacitor C4 and the other end of the alternating current;
the cathode of the third diode D3 is connected to one end of the second capacitor C2 and one end of the alternating current respectively;
the output end (V-) of the LED module is respectively connected with the anode of the third diode D3, the other end of the second capacitor C2, the other end of the fourth capacitor C4 and the anode of the sixth diode D6.
In the embodiment of the present invention, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 operate in an ac state and need to bear a reverse voltage, and preferably, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 all use non-polar capacitors to adapt to an ac operating environment. The ac withstand voltage value of the non-polar capacitor should be greater than or at least equal to the ac input voltage value.
Preferably, the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 have the same or similar capacitance values.
The working principle of the circuit of the embodiment of the invention is described as follows:
in the positive half cycle of the alternating current, current loops through the second diode D2, the first diode D1, the LED module and the sixth diode D6 to supply power to the LED module. Wherein,
in the phase of rising the alternating current voltage, the alternating current forms a loop through the second diode D2 and the third capacitor C3 to charge the third capacitor C3; meanwhile, the alternating current forms a loop through the second capacitor C2 and the sixth diode D6 to charge the second capacitor C2; meanwhile, the fourth capacitor C4, the first capacitor C1, the fourth diode D4 and the LED module form a loop to supply power to the LED module, that is, the charges stored in the first capacitor C1 and the fourth capacitor C4 are discharged to the LED module through the fourth diode D4, so as to provide the operating voltage for the LED module.
In the embodiment of the invention, in the alternating current voltage rising stage, the second capacitor C2 and the third capacitor C3 are in parallel connection in the circuit structure; the first capacitor C1 and the fourth capacitor C4 are in series connection with the alternating current module in the circuit structure, power is supplied to the LED module, namely, when the alternating current module is initially supplied with power or is switched between a positive half period and a negative half period, the voltage of alternating current is increased, the LED module can be conducted in advance, the quality factor of the circuit is improved, the stability of output voltage is improved, the light emitting efficiency of the LED module is improved, and the service life of the LED module is prolonged.
In the negative half cycle of the alternating current, the current loops through the fifth diode D5, the fourth diode D4, the LED module and the third diode D3 to supply power to the LED module. Wherein,
in the voltage absolute value rising stage, alternating current in the alternating current module forms a loop through the fifth diode D5 and the first capacitor C1 to charge the first capacitor C1; meanwhile, alternating current forms a loop through the fourth capacitor C4 and the third diode D3 to charge the fourth capacitor C4; meanwhile, the second capacitor C2, the third capacitor C3, the first diode D1 and the LED module form a loop to supply power to the LED module, that is, the charges stored in the second capacitor C2 and the third capacitor C3 are discharged to the LED module through the first diode D1, so as to provide the operating voltage for the LED module.
In the embodiment of the invention, in the charging process of the voltage absolute value rising stage, the first capacitor C1 and the fourth capacitor C4 are in parallel connection in the circuit structure; the second capacitor C2 and the third capacitor C3 are in series connection with the ac power module in the circuit structure, which is equivalent to increasing the absolute value of the voltage of the ac power to enable the LED module to be turned on in advance when the ac power is switched.
In the embodiment of the invention, the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are alternately charged and discharged in the positive half period and the negative half period of the alternating current, so that the voltage value output to the LED module is relatively stable, and the flicker frequency of the LED module during light emitting is reduced; meanwhile, the conduction time of the LED module in the positive half period and the negative half period of the alternating current is prolonged, the light emitting fluctuation of the LED module is reduced, and the power factor of the circuit is improved. Furthermore, the circuit structure of the embodiment of the invention is simple, the power supply efficiency is high, and the invention is very suitable for the lighting device of the LED module directly driven by alternating current.
In practical applications, in order to ensure that the output currents in the positive half period and the negative half period of the alternating current do not differ too much, in fig. 2 and 3, the equivalent resistances of the branches should be the same or similar, that is, the diode parameters in the branches should be the same or similar, and the capacitors should also have the same or similar capacitance values, for example, the diode parameters in the positive half-cycle rectifying branch should be the same or similar to the diode parameters in the negative half-cycle rectifying branch; the capacitance in the positive half-cycle feed branch should be the same as or similar to the capacitance in the negative half-cycle feed branch.
In the embodiment of the invention, the capacitors with the same or similar parameters are selected, which is beneficial to improving the electrical balance, is also beneficial to balancing the load, reducing the flicker and improving the power efficiency. In the embodiment of the invention, the charge-discharge characteristics of the capacitor are mainly utilized, so that the capacitor (capacitance) parameters are the most important parameters, and the charge-discharge characteristics can basically reach the same or similar by selecting the capacitors with the same or similar capacitors.
Preferably, in order to further improve the stability of the voltage signal output to the LED module, the ac rectifier circuit for driving the LED module according to the embodiment of the present invention further includes a Current Regulated Diode (CRD).
Fig. 4 is another specific structural diagram of an ac rectifying circuit for driving an LED module according to an embodiment of the present invention. Referring to fig. 4, unlike fig. 3, a Current Regulated Diode (CRD) is further included, and an anode of the CRD is connected to the output terminal of the LED module and a cathode of the CRD is connected to an anode of a third Diode D3. Therefore, the light emitting efficiency of the LED module is greatly improved by adding a constant current diode for current limiting in the direct current loop.
In fig. 3, although the embodiment of the present invention can solve the problem of fluctuation of light output of the LED module to a certain extent, the ac voltage trough is not filled to a large extent, and the light output of the LED module is only 30% to 40% of the light output at the peak at the ac voltage trough.
Thus, a preferred embodiment of the present invention is given, as shown in fig. 5.
Fig. 5 is a schematic diagram of another specific structure of an ac rectifying circuit for driving an LED module according to an embodiment of the present invention. Referring to fig. 5, unlike fig. 4, an electrolytic capacitor C5 is added as a filter capacitor to the basic circuit of the present invention, and the anode of the electrolytic capacitor C5 is connected to the input terminal of the LED module, and the cathode is connected to the anode of the sixth diode D6. In this way, the filtering function of the electrolytic capacitor C5 makes the current waveform flowing into the LED module smoother, and although some power factors are sacrificed, the light output of the LED module at the wave trough of the alternating voltage can reach more than 80% of the light output at the wave crest, and almost no difference exists in sense.
Fig. 6 is a schematic flow chart of an ac power rectification method for driving an LED module according to an embodiment of the present invention. Referring to fig. 6, the light emitting diode LED module is driven by an alternating current rectifying circuit including: alternating current module, positive half cycle rectification branch, positive half cycle feed branch, negative half cycle rectification branch and negative half cycle feed branch, this flow includes:
step 601, when the alternating current module is in a positive half cycle, the positive half cycle rectification branch circuit rectifies alternating current output by the alternating current module and outputs a rectified voltage signal to an external LED module;
in this step, the positive half-cycle rectification branch includes: a first rectifying tube, a second rectifying tube and a sixth rectifying tube, wherein,
the anode of the second rectifier tube is connected with one end of the alternating current module, and the cathode of the second rectifier tube is connected with the anode of the first rectifier tube;
the cathode of the first rectifier tube is connected with the input end of the external LED module;
and the anode of the sixth rectifier tube is connected with the output end of the external LED module, and the cathode of the sixth rectifier tube is connected with the other end of the alternating current module.
Step 602, the negative half-cycle feed branch is charged according to the alternating current output by the alternating current module, the positive half-cycle feed branch is discharged, and a discharged voltage signal is output to an external LED module;
in this step, the negative half-cycle feed branch includes: a second capacitor, and a third capacitor, wherein,
one end of the second capacitor is connected with one end of the alternating current module, and the other end of the second capacitor is connected with the output end of the external LED module;
one end of the third capacitor is connected with the anode of the first rectifying tube, and the other end of the third capacitor is connected with the other end of the alternating current module.
The positive half-cycle feed branch comprises: a first capacitor and a fourth capacitor, wherein,
one end of the first capacitor is connected with the anode of the fourth diode, and the other end of the first capacitor is connected with one end of the alternating current module;
one end of the fourth capacitor is connected with the other end of the alternating current module, and the other end of the fourth capacitor is connected with the output end of the external LED module.
Step 603, when the alternating current module is in the negative half cycle, the negative half cycle rectification branch line rectifies the alternating current output by the alternating current module, and outputs the rectified voltage signal to an external LED module;
in this step, the negative half-cycle rectification branch includes: a third rectifying tube, a fourth rectifying tube and a fifth rectifying tube, wherein,
the negative electrode of the third rectifier tube is connected with one end of the alternating current module, and the positive electrode of the third rectifier tube is connected with the output end of the external LED module;
the positive electrode of the fifth rectifying tube is connected with the other end of the alternating current module, and the negative electrode of the fifth rectifying tube is connected with the positive electrode of the fourth rectifying tube;
and the cathode of the fourth rectifier tube is connected with the input end of the external LED module.
And step 604, discharging the negative half-cycle feed branch, outputting a discharged voltage signal to an external LED module, and charging the positive half-cycle feed branch according to the alternating current output by the alternating current module.
Thus, in the embodiment of the present invention, in the positive half cycle of the alternating current, the current forms a loop through the second diode, the first diode, the LED module, and the sixth diode to supply power to the LED module, wherein,
in the step of rising the alternating current voltage, the alternating current forms a loop through the second diode and the third capacitor to charge the third capacitor; meanwhile, the alternating current forms a loop through the second capacitor and the sixth diode to charge the second capacitor; meanwhile, the fourth capacitor, the first capacitor, the fourth diode and the LED module form a loop to supply power to the LED module;
in the negative half period of the alternating current, the current forms a loop through the fifth diode, the fourth diode, the LED module and the third diode to supply power to the LED module, wherein,
in the stage of voltage absolute value rising, alternating current in the alternating current module forms a loop through a fifth diode and the first capacitor to charge the first capacitor; meanwhile, the alternating current forms a loop through the fourth capacitor and the third diode to charge the fourth capacitor; meanwhile, the second capacitor, the third capacitor, the first diode and the LED module form a loop to supply power to the LED module.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also encompasses these modifications and variations.
Claims (3)
1. An LED module as a light source of a lighting device, the LED module comprising a driving circuit, characterized in that the driving circuit comprises a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a fifth diode (D5), a sixth diode (D6), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3) and a fourth capacitor (C4), wherein,
the anode of the second diode (D2) is connected with one end of alternating current, and the cathode of the second diode is respectively connected with the anode of the first diode (D1) and one end of the third capacitor (C3);
the cathode of the first diode (D1) is respectively connected with the cathode of the fourth diode (D4) and the input end of the LED module;
the other end of the third capacitor (C3) is connected with the other end of the alternating current;
the anode of the fourth diode (D4) is respectively connected with the cathode of the fifth diode (D5) and one end of the first capacitor (C1);
the other end of the first capacitor (C1) is connected with one end of alternating current;
the anode of the fifth diode (D5) is respectively connected with the cathode of the sixth diode (D6), one end of the fourth capacitor (C4) and the other end of the alternating current;
the cathode of the third diode (D3) is respectively connected with one end of the second capacitor (C2) and one end of alternating current;
the output end of the LED module is respectively connected with the anode of the third diode (D3), the other end of the second capacitor (C2), the other end of the fourth capacitor (C4) and the anode of the sixth diode (D6);
wherein, in the positive half cycle of the alternating current, the current forms a loop through the second diode (D2), the first diode (D1), the LED module and the sixth diode (D6) to supply power to the LED module, wherein, in the rising phase of the alternating current voltage, the alternating current in the alternating current module forms a loop through the second diode (D2) and the third capacitor (C3) to charge the third capacitor (C3); meanwhile, alternating current forms a loop through the second capacitor (C2) and the sixth diode to charge the second capacitor (C2); meanwhile, the fourth capacitor (C4), the first capacitor (C1), the fourth diode (D4) and the LED module form a loop to supply power to the LED module;
during the negative half cycle of the alternating current, current loops through the fifth diode (D5), the fourth diode (D4), the LED module and the third diode (D3) to supply power to the LED module, wherein during the phase of rising of the absolute value of the voltage, the alternating current in the alternating current module loops through the fifth diode (D5) and the first capacitor (C1) to charge the first capacitor (C1); meanwhile, alternating current forms a loop through the fourth capacitor and the third diode (D3) to charge the fourth capacitor (C4); meanwhile, the second capacitor (C2), the third capacitor (C3), the first diode (D1) and the LED module form a loop to supply power to the LED module;
in the alternating current voltage rising stage, the second capacitor (C2) and the third capacitor (C3) are in parallel connection in circuit structure; the first capacitor (C1), the fourth capacitor (C4) are in series relation with the alternating current module in circuit structure;
during the charging process in the rising phase of the absolute value of the alternating current voltage, the first capacitor (C1) and the fourth capacitor (C4) are in parallel connection in circuit structure; the second capacitor (C2) and the third capacitor (C3) are in series connection with the alternating current power module in circuit structure.
2. An LED module as a light source of a lighting device, the LED module being integrated with and/or connected with an LED driving circuit, characterized in that the driving circuit comprises a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a fifth diode (D5), a sixth diode (D6), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3) and a fourth capacitor (C4), wherein,
the anode of the second diode (D2) is connected with one end of alternating current, and the cathode of the second diode is respectively connected with the anode of the first diode (D1) and one end of the third capacitor (C3);
the cathode of the first diode (D1) is respectively connected with the cathode of the fourth diode (D4) and the input end of the LED module;
the other end of the third capacitor (C3) is connected with the other end of the alternating current;
the anode of the fourth diode (D4) is respectively connected with the cathode of the fifth diode (D5) and one end of the first capacitor (C1);
the other end of the first capacitor (C1) is connected with one end of alternating current;
the anode of the fifth diode (D5) is respectively connected with the cathode of the sixth diode (D6), one end of the fourth capacitor (C4) and the other end of the alternating current;
the cathode of the third diode (D3) is respectively connected with one end of the second capacitor (C2) and one end of alternating current;
the output end of the LED module is respectively connected with the anode of the third diode (D3), the other end of the second capacitor (C2), the other end of the fourth capacitor (C4) and the anode of the sixth diode (D6);
the driving circuit further comprises a constant current diode (CRD), the anode of the constant current diode (CRD) is connected with the output end of the LED module, and the cathode of the constant current diode (CRD) is connected with the anode of the third diode (D3);
in the positive half cycle of the alternating current, current loops through the second diode (D2), the first diode (D1), the LED module, the constant current diode (CRD) and the sixth diode (D6) to supply power to the LED module, wherein in the phase of rising of the alternating current voltage, the alternating current in the alternating current module loops through the second diode (D2) and the third capacitor (C3) to charge the third capacitor (C3); meanwhile, alternating current forms a loop through the second capacitor (C2) and the sixth diode to charge the second capacitor (C2); meanwhile, the fourth capacitor (C4), the first capacitor (C1), the fourth diode (D4), the constant current diode (CRD) and the LED module form a loop to supply power to the LED module;
in the negative half cycle of the alternating current, current forms a loop through the fifth diode (D5), the fourth diode (D4), the LED module, the constant current diode (CRD) and the third diode (D3) to supply power to the LED module, wherein in the phase of voltage absolute value rising, the alternating current in the alternating current module forms a loop through the fifth diode (D5) and the first capacitor (C1) to charge the first capacitor (C1); meanwhile, alternating current forms a loop through the fourth capacitor and the third diode (D3) to charge the fourth capacitor (C4); meanwhile, the second capacitor (C2), the third capacitor (C3), the first diode (D1), the constant current diode (CRD) and the LED module form a loop to supply power to the LED module;
in the alternating current voltage rising stage, the second capacitor (C2) and the third capacitor (C3) are in parallel connection in circuit structure; the first capacitor (C1), the fourth capacitor (C4) are in series relation with the alternating current module in circuit structure;
during the charging process in the rising phase of the absolute value of the alternating current voltage, the first capacitor (C1) and the fourth capacitor (C4) are in parallel connection in circuit structure; the second capacitor (C2) and the third capacitor (C3) are in series connection with the alternating current power module in circuit structure.
3. An LED module as a light source of a lighting device, the LED module comprising a driving circuit, characterized in that the driving circuit comprises a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a fifth diode (D5), a sixth diode (D6), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3) and a fourth capacitor (C4), wherein,
the anode of the second diode (D2) is connected with one end of alternating current, and the cathode of the second diode is respectively connected with the anode of the first diode (D1) and one end of the third capacitor (C3);
the cathode of the first diode (D1) is respectively connected with the cathode of the fourth diode (D4) and the input end of the LED module;
the other end of the third capacitor (C3) is connected with the other end of the alternating current;
the anode of the fourth diode (D4) is respectively connected with the cathode of the fifth diode (D5) and one end of the first capacitor (C1);
the other end of the first capacitor (C1) is connected with one end of alternating current;
the anode of the fifth diode (D5) is respectively connected with the cathode of the sixth diode (D6), one end of the fourth capacitor (C4) and the other end of the alternating current;
the cathode of the third diode (D3) is respectively connected with one end of the second capacitor (C2) and one end of alternating current;
the output end of the LED module is respectively connected with the anode of the third diode (D3), the other end of the second capacitor (C2), the other end of the fourth capacitor (C4) and the anode of the sixth diode (D6);
the driving circuit further comprises a constant current diode (CRD), the anode of the constant current diode (CRD) is connected with the output end of the LED module, and the cathode of the constant current diode (CRD) is connected with the anode of the third diode (D3);
the driving circuit further comprises an electrolytic capacitor (C5), wherein the anode of the electrolytic capacitor (C5) is connected with the input end of the LED module, and the cathode of the electrolytic capacitor (C5) is connected with the anode of the sixth diode (D6);
in the positive half cycle of the alternating current, current loops through the second diode (D2), the first diode (D1), the LED module, the constant current diode (CRD) and the sixth diode (D6) to supply power to the LED module, wherein in the phase of rising of the alternating current voltage, the alternating current in the alternating current module loops through the second diode (D2) and the third capacitor (C3) to charge the third capacitor (C3); meanwhile, alternating current forms a loop through the second capacitor (C2) and the sixth diode to charge the second capacitor (C2); meanwhile, the fourth capacitor (C4), the first capacitor (C1), the fourth diode (D4), the constant current diode (CRD) and the LED module form a loop to supply power to the LED module;
in the negative half cycle of the alternating current, current forms a loop through the fifth diode (D5), the fourth diode (D4), the LED module, the constant current diode (CRD) and the third diode (D3) to supply power to the LED module, wherein in the phase of voltage absolute value rising, the alternating current in the alternating current module forms a loop through the fifth diode (D5) and the first capacitor (C1) to charge the first capacitor (C1); meanwhile, alternating current forms a loop through the fourth capacitor and the third diode (D3) to charge the fourth capacitor (C4); meanwhile, the second capacitor (C2), the third capacitor (C3), the first diode (D1), the constant current diode (CRD) and the LED module form a loop to supply power to the LED module;
in the alternating current voltage rising stage, the second capacitor (C2) and the third capacitor (C3) are in parallel connection in circuit structure; the first capacitor (C1), the fourth capacitor (C4) are in series relation with the alternating current module in circuit structure;
during the charging process in the rising phase of the absolute value of the alternating current voltage, the first capacitor (C1) and the fourth capacitor (C4) are in parallel connection in circuit structure; the second capacitor (C2) and the third capacitor (C3) are in series connection with the alternating current power module in circuit structure.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6272032B1 (en) * | 1999-08-11 | 2001-08-07 | Patent -Treuh Nd-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Rectifier with midpoint feed |
| CN1638595A (en) * | 2004-01-09 | 2005-07-13 | 电灯专利信托有限公司 | Circuit device for driving light source |
| US20080252229A1 (en) * | 2007-04-13 | 2008-10-16 | Cree, Inc. | High efficiency AC LED driver circuit |
| CN101527994A (en) * | 2008-03-07 | 2009-09-09 | 杨泰和 | Bipolar (dis) charging led drive circuit |
| CN102308672A (en) * | 2008-12-03 | 2012-01-04 | Armi产品公司 | Device and method for periodic diode actuation |
-
2013
- 2013-01-31 CN CN201410809004.4A patent/CN104540283B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6272032B1 (en) * | 1999-08-11 | 2001-08-07 | Patent -Treuh Nd-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Rectifier with midpoint feed |
| CN1638595A (en) * | 2004-01-09 | 2005-07-13 | 电灯专利信托有限公司 | Circuit device for driving light source |
| US20080252229A1 (en) * | 2007-04-13 | 2008-10-16 | Cree, Inc. | High efficiency AC LED driver circuit |
| CN101527994A (en) * | 2008-03-07 | 2009-09-09 | 杨泰和 | Bipolar (dis) charging led drive circuit |
| CN102308672A (en) * | 2008-12-03 | 2012-01-04 | Armi产品公司 | Device and method for periodic diode actuation |
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