Alternating current rectifying circuit and alternating current rectifying method for driving LED module
First Claim
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1. An alternating current rectifying circuit for driving a load module, characterized in that, the alternating current rectifying circuit comprises:
- an alternating current module, a positive half cycle rectifying branch, a positive half cycle feeding branch, a negative half cycle rectifying branch, a negative half cycle feeding branch, and an overvoltage protection branch, wherein;
the positive half cycle rectifying branch is configured to, when the alternating current module is in a positive half cycle, rectify an alternating current outputted from the alternating current module, and output a rectified voltage signal to the overvoltage protection branch and an external load module;
the positive half cycle feeding branch is configured to perform charging according to the alternating current outputted from the alternating current module when the alternating current module is in a negative half cycle; and
perform discharging and output a discharged voltage signal to the overvoltage protection branch and the external load module when the alternating current module is in the positive half cycle;
the negative half cycle rectifying branch is configured to, when the alternating current module is in the negative half cycle, rectify the alternating current outputted from the alternating current module, and output a rectified voltage signal to the overvoltage protection branch and the external load module;
the negative half cycle feeding branch is configured to perform charging according to the alternating current outputted from the alternating current module when the alternating current module is in the positive half cycle; and
perform discharging and output a discharged voltage signal to the overvoltage protection branch and the external load module when the alternating current module is in the negative half cycle; and
the overvoltage protection branch is configured to turn off an electrical path of the external load module when the inputted voltage signal is higher than a preset voltage threshold.
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Abstract
Disclosed are an alternating current rectifying circuit and an alternating current rectifying method for driving an LED module. By using the present invention, stability of an output voltage can be improved, and luminous efficiency of the LED module can be improved.
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Citations
20 Claims
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1. An alternating current rectifying circuit for driving a load module, characterized in that, the alternating current rectifying circuit comprises:
- an alternating current module, a positive half cycle rectifying branch, a positive half cycle feeding branch, a negative half cycle rectifying branch, a negative half cycle feeding branch, and an overvoltage protection branch, wherein;
the positive half cycle rectifying branch is configured to, when the alternating current module is in a positive half cycle, rectify an alternating current outputted from the alternating current module, and output a rectified voltage signal to the overvoltage protection branch and an external load module; the positive half cycle feeding branch is configured to perform charging according to the alternating current outputted from the alternating current module when the alternating current module is in a negative half cycle; and
perform discharging and output a discharged voltage signal to the overvoltage protection branch and the external load module when the alternating current module is in the positive half cycle;the negative half cycle rectifying branch is configured to, when the alternating current module is in the negative half cycle, rectify the alternating current outputted from the alternating current module, and output a rectified voltage signal to the overvoltage protection branch and the external load module; the negative half cycle feeding branch is configured to perform charging according to the alternating current outputted from the alternating current module when the alternating current module is in the positive half cycle; and
perform discharging and output a discharged voltage signal to the overvoltage protection branch and the external load module when the alternating current module is in the negative half cycle; andthe overvoltage protection branch is configured to turn off an electrical path of the external load module when the inputted voltage signal is higher than a preset voltage threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- an alternating current module, a positive half cycle rectifying branch, a positive half cycle feeding branch, a negative half cycle rectifying branch, a negative half cycle feeding branch, and an overvoltage protection branch, wherein;
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13. An alternating current rectifying method for driving a load module, wherein the load module is driven by an alternating current rectifying circuit and the alternating current rectifying circuit comprises:
- an alternating current module, a positive half cycle rectifying branch, a positive half cycle feeding branch, a negative half cycle rectifying branch, a negative half cycle feeding branch, and an overvoltage protection branch, the method comprising the steps of;
when the alternating current module is in a positive half cycle, rectifying by the positive half cycle rectifying branch an alternating current outputted from the alternating current module, and outputting a rectified voltage signal to the overvoltage protection branch and an external load module; performing by the negative half cycle feeding branch charging according to the alternating current outputted from the alternating current module, and performing by the positive half cycle feeding branch discharging and outputting a discharged voltage signal to the overvoltage protection branch and the external load module; and turning off by the overvoltage protection branch an electrical path of the external load module when the inputted voltage signal is higher than a preset voltage threshold; and when the alternating current module is in the negative half cycle, rectifying by the negative half cycle rectifying branch the alternating current outputted from the alternating current module, and outputting a rectified voltage signal to the overvoltage protection branch circuit and the external load module; performing by the negative half cycle feeding branch discharging, and outputting a discharged voltage signal to the overvoltage protection branch and the external load module, and performing by the positive half cycle feeding branch charging according to the alternating current outputted from the alternating current module; and turning off by the overvoltage protection branch the electrical path of the external load module when the inputted voltage signal is higher than the preset voltage threshold. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
- an alternating current module, a positive half cycle rectifying branch, a positive half cycle feeding branch, a negative half cycle rectifying branch, a negative half cycle feeding branch, and an overvoltage protection branch, the method comprising the steps of;
Specification