Patent ID: 7572040

Claim:
An optical axis control device for controlling an optical axis of a first headlight comprising: a first interface operably connected to a first sensor and configured to receive a first signal from the first sensor, the first sensor being disposed at one of the front and rear of a vehicle, the first sensor being configured to measure a change in height of the vehicle body; a second interface operably connected to an additional optical axis control device that is disposed remotely relative to the optical axis control device, the additional optical axis control device being substantially identical to the optical axis control device, wherein the second interface is configured to: transmit a first information to the additional optical axis control device, the first information being representative of a first signal from the first sensor; and receive a second information from the additional optical axis control device, the received second information being representative of a second signal from a second sensor that is operably connected to the additional optical axis control device wherein the second sensor is disposed at the other of the front and rear of the vehicle, the second sensor being configured to measure a change in height of the vehicle body and to supply the second signal to the additional optical axis control device wherein the additional optical axis control device controls an optical axis of a second headlight; an actuator control unit configured to output a control signal to a levelizer actuator of the first headlight of the vehicle for controlling the optical axis of the first headlight based on the first signal from said first sensor and said second information received from the additional optical axis control device; and a lighting unit configured to light said first headlight.