Lamp driver

• US 7,348,735 B2
• Filed: 04/30/2004
• Issued: 03/25/2008
• Est. Priority Date: 05/01/2003
• Status: Active Grant

• Current Assignee: Inventive Holdings LLC
• Original Assignee: Inventive Holdings LLC
• Inventors: Lestician, Guy J.
• Primary Examiner(s): Vo; Tuyet
• Application Number:
  US10/835,839
• Publication Number:
  US 20050001560A1
• Time in Patent Office: 1,425 Days
• Field of Search: 315/247, 315/246, 315/209.R, 315/291, 315/307, 315/274, 315/282, 315276-279, 315/283, 315/287
• US Class Current: 315/247
• CPC Class Codes: H05B 41/282 with semiconductor devices H05B41/2806, H05B41/288, H05B41/295 take precedence
• CPC Class Codes: H05B 41/36 Controlling
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

An electronic device for starting and/or re-starting a power-driven device such as a lamp, bulb or lighting fixture includes an input stage, a rectifier stage, a power factor correction stage with total harmonic distortion correction, and a coil device comprising a wound coil having a primary winding of multistranded wire. The circuit may automatically adjust to a range of loads, and/or it may provide an auto-ranging line voltage. In an embodiment, the input stage accepts an AC input signal, the rectifier stage converts the AC input signal to a DC signal, and the coil device converts the DC signal to an AC output signal. The device may also include a frequency adjustment circuit that adjusts the frequency of the AC output signal to assistance in the performance of a restart function.

Claims

1. An electronic circuit, comprising:

an input stage;

a first filter connected to the input stage;

a rectifier stage connected to the first filter;

a power factor correction stage connected to the rectifier stage, wherein the power factor correction stage comprises a two-stage power factor correction controller;

a second filter connected to the power factor correction stage; and

an output coil device comprising a wound coil having a primary winding of multistranded wire, wherein the power factor correction stage and the output coil device are configured to deliver a reduced start-up current to a device connected to the electronic circuit.

2. The circuit of claim 1 further comprising a feedback stage.

3. The circuit of claim 1, wherein the circuit automatically adjusts to a range of loads.

4. The circuit of claim 1 wherein at least one of the stages includes a thermal cutout component.

5. The circuit of claim 1 wherein the power factor correction stage further includes a coil device having a primary winding of multistranded wire.

6. The circuit of claim 1 wherein the output coil device comprises a choke, and the circuit will control the delivery of power to one or more non-fluorescent bulbs.

7. The circuit of claim 1 wherein the output coil device further includes a secondary winding, and the circuit will control the delivery of power to one or more fluorescent bulbs.

8. The circuit of claim 1 further comprising an output stage including a ballast controller and one or more MOSFETs.

9. The circuit of claim 1 wherein the output coil device comprises a transformer or a choke.

10. The circuit of claim 1, wherein the circuit is for driving at least one of the following:

a fluorescent bulb; and

a high-intensity discharge bulb.

11. The circuit of claim 1, wherein the circuit is for driving a metal halide bulb.

12. The circuit of claim 1 wherein:

the input stage is configured to accept an AC input signal;

the rectifier stage is configured to convert the AC input signal to a DC signal; and

the coil device is configured to convert the DC signal to an AC output signal.

13. The circuit of claim 12 further comprising a frequency adjustment circuit that is configured to adjust the frequency of the AC output signal.