COMPACT FLUORESCENT LAMP THREE-WAY BALLAST DRIVER
First Claim
1. A compact fluorescent lamp (CFL) ballast driver comprising:
- a first and a second AC voltage terminal, and a neutral AC voltage terminal;
a full wave rectifier electrically coupled between the first AC voltage terminal and the neutral AC input terminal;
the full wave rectifier including a branch electrically coupled between the second AC voltage terminal and the neutral AC input terminal;
a resonator circuit including at least two inductors, and configured to provide an output voltage to a CFL lamp;
a first state detector circuit configured to monitor the first AC voltage terminal;
a second state detector circuit configured to monitor the second AC voltage terminal;
the first and the second state detector circuits configured to activate respective first and second switches;
the first switch configured to shunt one inductor of the resonator circuit; and
the second switch configured to shunt another inductor of the resonator circuit.
2 Assignments
0 Petitions
Accused Products
Abstract
A compact fluorescent lamp (CFL) ballast driver includes first, second and neutral AC voltage terminals, a full wave rectifier between the first AC voltage terminal and the neutral AC input terminal, and a separate branch between the second AC voltage terminal and the neutral AC input terminal. A resonator circuit includes at least two inductors and provides its output voltage to a CFL lamp. The driver includes a first state detector circuit to monitor the first AC voltage terminal, and a second state detector circuit to monitor the second AC voltage terminal. The first and second state detector circuits activate respective first and second switches. The first switch shunts one inductor of the resonator circuit, and the second switch shunts another inductor of the resonator circuit. The driver can be housed in a CFL having a capper, a three-way lamp base adjacent to the capper and an arc tube.
-
Citations
15 Claims
-
1. A compact fluorescent lamp (CFL) ballast driver comprising:
-
a first and a second AC voltage terminal, and a neutral AC voltage terminal; a full wave rectifier electrically coupled between the first AC voltage terminal and the neutral AC input terminal; the full wave rectifier including a branch electrically coupled between the second AC voltage terminal and the neutral AC input terminal; a resonator circuit including at least two inductors, and configured to provide an output voltage to a CFL lamp; a first state detector circuit configured to monitor the first AC voltage terminal; a second state detector circuit configured to monitor the second AC voltage terminal; the first and the second state detector circuits configured to activate respective first and second switches; the first switch configured to shunt one inductor of the resonator circuit; and the second switch configured to shunt another inductor of the resonator circuit. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A compact fluorescent lamp comprising:
-
a lamp base including an exterior surface having first and second line voltage contacts and a neutral line voltage contact; a compact fluorescent lamp (CFL) arc tube located distal from the lamp base; a capper located adjacent to the lamp base; a three-way CFL ballast circuit housed within the capper; the three-way CFL ballast circuit including; a first state detector circuit configured to monitor the first line voltage contact; a second state detector circuit configured to monitor the second line voltage contact; and the first and the second state detector circuits configured to activate respective first and second switches; a resonator circuit including at least two inductors, and configured to provide an output voltage level; the first switch configured to shunt one inductor of the resonator circuit; the second switch configured to shunt another inductor of the resonator circuit; and wherein output voltage level of the three-way CFL ballast circuit is varied based on the activation of the first and the second switches. - View Dependent Claims (8, 9, 11, 12, 13, 14, 15)
-
-
10. (canceled)
Specification