Patent ID: 6984059

Claim:
A headlight axis control device for controlling orientation of a vehicle headlight axis, said device comprising: steering angle detecting means for detecting a vehicle steering wheel angle; filtering means for changing responsiveness in controlling the orientation of the headlight axis by filtering the detected vehicle steering wheel angle; swivel control means for laterally swiveling the orientation of the headlight axis based on the filtered vehicle steering wheel angle; wherein a presently detected steering angle by the steering angle detecting means refers to a present pre-filtering steering angle (STRA(j)), a presently filtered steering angle by the filtering means refers to a present post-filtering steering angle (STA(j)), and a previously filtered steering angle by the filtering means refers to a previous post-filtering steering angle (STA(j−1)); wherein the present post-filtering steering angle STA (j) is specified using a filter constant (β) with a formula where STA(j)=β×STRA(j)+(1−β)×STA(j−1); and wherein the swivel control means laterally swivels the orientation of the headlight axis based on the present post-filtering steering angle (STA(j)).