Method and circuit for correcting a difference in light...

Details Method and circuit for correcting a difference in light... Method and circuit for correcting a difference in light...

2011-08-23

2011-08-23

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S294000, C315S307000, C315S312000

Reexamination Certificate

active

08004206

ABSTRACT:
A method and electrical circuit corrects a difference in light output at opposite ends of a fluorescent lamp array. An electrical circuit for correcting a difference in light output at the ends of a fluorescent lamp array includes a microcontroller and firmware for generating a first pulse-width modulated inverter switch control signal having a first duty cycle that may be varied by computer program instructions executed by the microcontroller. An inverter bridge driver is coupled to the microcontroller for generating a switching signal for a first inverter bridge from the first pulse-width modulated inverter switch control signal to generate a first inverter voltage having a magnitude determined by the first duty cycle.

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