Patent ID: 7093963

Claim:
A light axis adjusting apparatus for a vehicle headlamp, comprising: a light axis adjustor for adjusting a light axis of the headlamp of a vehicle; an operating state detector for detecting an operating state of the vehicle; an inclined state detector including two ultrasonic wave transmitters and two receivers for receiving ultrasonic signals from said transmitters, said inclined state detector being adapted to detect an inclined state of the vehicle relative to a road surface based on a receiving time difference between the respective receivers; an abnormality detector for detecting an abnormality of said inclined state detector based on a received state of said ultrasonic signals; a display device, placed within a vehicle compartment of the vehicle, for indicating the abnormality of said inclined state detector; and a control device for controlling said light axis adjustor based on the results of detection of said inclined state detector and said abnormality detector, and also for actuating said display device when said abnormality detector determines the abnormality of said inclined state detector.