CIRCUITS AND METHODS FOR DRIVING LIGHT SOURCES
First Claim
1. A controller for controlling power to a light source, wherein said light source receives a rectified AC voltage and comprises a first plurality of LEDs and a second plurality of LEDs, wherein said controller regulates a current flowing through said first plurality of LEDs to a first predetermined level when said rectified AC voltage is within a first predetermined range, and wherein said second plurality of LEDs remain off when said rectified AC voltage is within said first predetermined range.
1 Assignment
0 Petitions
Accused Products
Abstract
A controller controls power to a light source. The light source receives a rectified AC voltage and includes a first plurality of LEDs and a second plurality of LEDs. The controller regulates a current flowing through the first plurality of LEDs to a first predetermined level when the rectified AC voltage is within a first predetermined range. The second plurality of LEDs remain off when the rectified AC voltage is within the first predetermined range.
37 Citations
20 Claims
- 1. A controller for controlling power to a light source, wherein said light source receives a rectified AC voltage and comprises a first plurality of LEDs and a second plurality of LEDs, wherein said controller regulates a current flowing through said first plurality of LEDs to a first predetermined level when said rectified AC voltage is within a first predetermined range, and wherein said second plurality of LEDs remain off when said rectified AC voltage is within said first predetermined range.
-
10. A circuit for powering a light source comprising a first plurality of LEDs and a second plurality of LEDs, said circuit comprising:
-
a rectifier that receives an AC voltage and provides a rectified AC voltage to said first plurality of LEDs and said second plurality of LEDs; a first current regulator coupled to said first plurality of LEDs; a second current regulator coupled to said second plurality of LEDs; a controller that enables said first current regulator to regulate a current flowing through said first plurality of LEDs to a first predetermined level when said rectified AC voltage is within a first predetermined range, wherein said second plurality of LEDs remain off when said rectified AC voltage is within said first predetermined range. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification