POWER SYSTEMS WITH MULTIPLE POWER SOURCES
First Claim
1. A system for powering a light-emitting diode (LED) light source, comprising:
- a first power source with a first voltage;
a second power source with a second voltage;
a controller coupled to said first power source and said second power source, and for comparing said first voltage with said second voltage, controlling said first power source to charge said second power source via a first switch and a second switch in a charging mode when said first voltage is greater than said second voltage, and controlling said second power source to power said LED light source via said second switch and a third switch in a load-powering mode when said second voltage is greater than said first voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
In one embodiment, a power system includes a first power source having a first voltage, a second power source having a second voltage, and a controller. The controller is coupled to the first power source and the second power source. The controller compares the first voltage with the second voltage, controls the first power source to charge the second power source via a first switch and a second switch in a charging mode when the first voltage is greater than said second voltage, and controls the second power source to power a load such as a light-emitting diode (LED) light source via the second switch and a third switch in a load-powering mode when the second voltage is greater than the first voltage.
14 Citations
20 Claims
-
1. A system for powering a light-emitting diode (LED) light source, comprising:
-
a first power source with a first voltage; a second power source with a second voltage; a controller coupled to said first power source and said second power source, and for comparing said first voltage with said second voltage, controlling said first power source to charge said second power source via a first switch and a second switch in a charging mode when said first voltage is greater than said second voltage, and controlling said second power source to power said LED light source via said second switch and a third switch in a load-powering mode when said second voltage is greater than said first voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A control circuit for controlling power to a light-emitting diode (LED) light source, comprising:
-
a first switch; a second switch coupled to said first switch; a third switch coupled between said first switch and said second switch; and a controller coupled to said first switch, said second switch and said third switch for comparing a first voltage of a first power source with a second voltage of a second power source, wherein said controller controls said first power source to charge said second power source via said first switch and said second switch in a charging mode when said first voltage is greater than said second voltage, and controls said second power source to power said LED light source via said second switch and said third switch in a load-powering mode when said second voltage is greater than said first voltage. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A method for powering a light-emitting diode (LED) light source, comprising:
-
comparing a first voltage of a first power source with a second voltage of a second power source; alternately turning on a first switch and a second switch, and turning off a third switch in a first mode when said first voltage is greater than said second voltage, wherein said first power source charges said second power source via said first switch and said second switch in said first mode; and alternately turning on said second switch and said third switch, and turning off said first switch in a second mode, wherein said second power source powers said LED light source via said second switch and said third switch in said second mode. - View Dependent Claims (18, 19, 20)
-
Specification