Patent ID: 6670723
Filing Date: 2003-12-30
Classification: B60Q

Abstract:
An irradiation direction control apparatus for a vehicular lamp, said apparatus adapted to acquire data representing a pitch angle of a vehicle by detecting change in height of an axle portion of at least one of front wheels and rear wheels, and to change an irradiation direction of a vehicle lamp according to change in attitude of said vehicle in such a manner as to cancel change in the pitch angle, said apparatus comprising:irradiation control means which calculates a moving average value of data representing the change in the height of said axle portion or represents the pitch angle, every predetermined time period, obtains a second order moving average value of the calculated moving average value, and controls said lamp according to a control signal which is based on the obtained second order moving average value, in such a manner as to maintain the irradiation direction in a fixed direction.