Ignition for ceramic metal halide high frequency ballasts

Details Ignition for ceramic metal halide high frequency ballasts Ignition for ceramic metal halide high frequency ballasts

2008-08-14

2011-12-13

Choi, Jacob Y (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S2090SC, C315S225000

Reexamination Certificate

active

08076865

ABSTRACT:
A high frequency ballast for a metal halide lamp comprises a controller, a switch, and an oscillator. The controller selectively enables and disables the oscillator via the switch to ignite the lamp. The switch is in a power supply loop of the oscillator and selectively open circuits and close circuits the power supply loop. When the switch close circuits the power supply loop, the oscillator oscillates and provides power to the lamp. When the switch open circuits the power supply loop, the oscillator does not oscillate and does not provide power to the lamp.

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Lin et al., “2.65 MHz Self-oscillating Electronic Ballast with Constant Lamp-Current Control for Metal Halide Lamp”, 37th IEEE Power Electronics Specialists Conference, Jun. 18, 2006, 6 pgs.

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