Nicholas W. Howell - Dearborn Heights MI, US Stephen B. White - Minnesota City MN, US Gerard Zettler - Winona MN, US Kevin L. Medin - Lewiston MN, US
Assignee:
TRW AUTOMOTIVE U.S. LLC - Livonia MI
International Classification:
H05B 33/08
US Classification:
315209 R
Abstract:
A method and apparatus for generating a pulse width modulated voltage that has a duty cycle that is inversely proportional to a sensed battery voltage and using the generated pulse width modulated voltage to control a light emitting diode to maintain the intensity of light emitted as the battery voltage fluctuates.