Direct AC-to-DC converter for passive component minimization and universal operation of LED arrays
First Claim
1. A power converter circuit for a LED lighting device, comprising:
- a pair of input terminals adapted to be connected to a signal source;
at least one LED;
a first control circuit adapted to supply current to the at least one LED and including;
a first bi-directional switch connected between one input terminal and one side of the at least one LED, and a second bi-directional switch connected between the other side of the at least one LED and the other input terminal, wherein current flows through the at least one LED in a predetermined direction when both of the first and second bi-directional switches are conducting in a first direction; and
a second control circuit adapted to supply current to the at least one LED and including;
a third bi-directional switch connected between the other input terminal and the one side of the at least one LED, and a fourth bi-directional switch connected between the one input terminal and the other side of the at least one LED, wherein current flows through the at least one LED in the predetermined direction when both of the third and fourth bi-directional switches are conducting in a second direction.
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Accused Products
Abstract
Disclosed herein is a power converter circuit for a LED lighting device. The power converter includes a pair of input terminals adapted to be connected to a signal source, at least one LED, a first circuit adapted to supply current to the at least one LED and including: a first bi-directional switch connected between one input terminal and one side of the at least one LED, and a second bi-directional switch connected between the other side of the at least one LED and the other input terminal, and a second circuit adapted to supply current to the at least one LED and including: a third bi-directional switch connected between the other input terminal and the one side of the at least one LED, and a fourth bi-directional switch connected between the one input terminal and the other side of the at least one LED.
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Citations
22 Claims
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1. A power converter circuit for a LED lighting device, comprising:
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a pair of input terminals adapted to be connected to a signal source; at least one LED; a first control circuit adapted to supply current to the at least one LED and including; a first bi-directional switch connected between one input terminal and one side of the at least one LED, and a second bi-directional switch connected between the other side of the at least one LED and the other input terminal, wherein current flows through the at least one LED in a predetermined direction when both of the first and second bi-directional switches are conducting in a first direction; and a second control circuit adapted to supply current to the at least one LED and including; a third bi-directional switch connected between the other input terminal and the one side of the at least one LED, and a fourth bi-directional switch connected between the one input terminal and the other side of the at least one LED, wherein current flows through the at least one LED in the predetermined direction when both of the third and fourth bi-directional switches are conducting in a second direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of supplying power to a LED lighting device through a power converter including first, second, third and fourth bi-directional switches and first and second control circuits, the method comprising:
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receiving a current signal; generating a first control signal through the first control circuit for the first and third bi-directional switches; generating a second control signal through the second control circuit for the second and fourth bi-directional switches; and supplying the current signal to the at least one LED in a predetermined direction when one of the first and second bi-directional switches are conducting in a first direction and the third and fourth bi-directional switches are conducting in a second direction in response to the first and second control signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification