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US 2006/0220589 A1Published application
Pulse starting circuit
OwnerLouis Nerone, Laszlo Ilyesinventors
Life of this patent
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Abstract
A lamp ballast starting circuit and method for a gas discharge lamp is disclosed. The ballast starting circuit includes the inputs of the starting circuit connected to an inverter circuit, the starting circuit generating a pulse at the leading edge of each alternating half cycle of the inverter circuit output, the polarity of the pulse being the same as the polarity of each alternating half cycle of the inverter circuit output. The output of the starting circuit starts a gas discharge lamp.
Claims20
A ballast for a gas discharge lamp comprising:
- a DC voltage bus including a positive connection point and a negative connection point;
- a full-bridge inverter circuit including a DC voltage bus input and a bi-directional voltage output circuit including a first and a second output connection points, the bi-directional voltage output circuit generating a bi-directional voltage of alternating half cycles, and the DC voltage bus input of the full-bridge inverter circuit connected to the DC voltage bus outputs;
- and
- a starting circuit, including an input and output, the input of the starting circuit connected to the full-bridge inverter circuit, the starting circuit generating a pulse at the leading edge of each alternating half cycle, the polarity of the pulse being the same as the polarity of each alternating half cycle.
1 more element
A ballast for a gas discharge lamp comprising:
- a means for generating a DC voltage bus including a positive connection point and a negative connection point;
- a means for generating a bi-directional voltage of alternating half cycles;
- and
- a means for generating a pulse at the leading edge of each alternating half cycle, the polarity of the pulse being the same as the polarity of each alternating half cycle.
1 more element
A method of operating a ballast circuit comprising:
- generating a DC voltage bus;
- generating a bi-directional voltage of alternating half cycles from the DC voltage bus;
- and
- generating a pulse at the leading edge of each alternating half cycle, the polarity of the pulse being the same as the polarity of each alternating half cycle.
1 more element
Dependencies are inferred from the claim text.