Optical axis adjusting device for vehicle headlamp
First Claim
1. An optical axis adjusting device for a vehicle headlamp, which judges an inclined state of a vehicle with respect to a road surface on the basis of detection of an ultrasonic sensor and adjusts an optical axis of the headlamp based on the inclined state, comprising:
- a hindrance factor detection device that detects a factor hindering the detection by the ultrasonic sensor; and
a control device that suspends the optical axis adjustment of the headlamp when the hindrance factor is detected by the hindrance factor detection device.
2 Assignments
0 Petitions
Accused Products
Abstract
An optical axis adjusting device for a vehicle headlamp judges an inclined state of the vehicle on the basis of detection of an ultrasonic sensor of a vehicle, and performs an optical axis adjustment of a headlamp. In order to accurately judge the inclined state and to suitably adjust the optical axis of the headlamp, with respect to the detection by the ultrasonic sensor, a factor hindering its accurate detection is detected, and when it is judged that the ultrasonic sensor can not perform an accurate detection, the optical axis adjustment of the headlamp is suspended.
-
Citations
13 Claims
-
1. An optical axis adjusting device for a vehicle headlamp, which judges an inclined state of a vehicle with respect to a road surface on the basis of detection of an ultrasonic sensor and adjusts an optical axis of the headlamp based on the inclined state, comprising:
-
a hindrance factor detection device that detects a factor hindering the detection by the ultrasonic sensor; and
a control device that suspends the optical axis adjustment of the headlamp when the hindrance factor is detected by the hindrance factor detection device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An optical axis adjusting device for a vehicle headlamp, comprising:
-
an inclination sensor that detects an inclined state of a vehicle with respect to a road surface, said inclination sensor emits a sound wave and receives the sound wave reflected by a the road surface to determine the inclined state of the vehicle;
an actuator for adjusting an optical axis of the headlamp based on the detected inclined state of the vehicle;
a hindrance factor detection device that detects a factor hindering the detection by the inclination sensor; and
a control device that suspends adjustment of the optical axis when the hindrance factor is detected. - View Dependent Claims (12)
-
-
13. A method of adjusting an optical axis adjusting device for a vehicle headlamp, comprising:
-
detecting an inclined state of a vehicle with respect to a road surface by emitting a sound wave and receiving the sound wave reflected by a the road surface to determine the inclined state of the vehicle;
adjusting an optical axis of the headlamp based on the detected inclined state of the vehicle;
detecting a factor hindering the detection of the inclined state; and
suspending adjustment of the optical axis when the hindrance factor is detected.
-
Specification