Head lamp control method and apparatus

Details Head lamp control method and apparatus Head lamp control method and apparatus

B - Operations, Transporting

60

Q

315/8

B60Q 1/08 (2006.01) B60Q 1/14 (2006.01) B60Q 1/26 (2006.01)

Patent

CA 1308160

Head Lamp Control Method and Apparatus Abstract A pulse width modulation control unit for energizing a vehicle head lamp. During daylight operation of a motor vehicle the control unit energizes the head lamp by pulse width modulating the battery output and coupling the modulating output across the head lamp. As battery voltage changes the pulse width modulation is adjusted to maintain power output of the head lamp. An over current condition in a switching transistor is monitored and used to de-activate the pulse width modulation of the head lamp energization.

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