Patent ID: 7898182

Claim:
A headlight control device for vehicles comprising: means for manually switching an illumination state of a headlight between a first illumination state and a second illumination state where the amount of illumination to a distance is larger than that in the first illumination state; means for detecting a traveling condition of the vehicle; and an electronic control unit including means for automatically switching the illumination state of the headlight and means for learning a threshold value; wherein the automatically switching means is configured to switch the illumination state of the headlight between the first illumination state and the second illumination state based on the threshold value depending upon the traveling condition detected by the detecting means; the learning means is configured to learn a new threshold value for determining switching between the first illumination state and the second illumination state based on the traveling condition detected by the detecting means when the illumination state of the headlight is manually switched by the manually switching means, and the automatically switching means is configured to determine the switching between the first illumination state and the second illumination state by using the new threshold value for determining the switching over learned by the learning means.