Patent ID: 9387796
Filing Date: 2016-07-12
CPC Classification: B60Q

Claim Text:
1. A headlight light distribution control device which is mounted on a vehicle and switches an irradiation direction of a headlight of the vehicle, comprising: (A) a light source detector which detects a light source in the front of the vehicle; and (B) a control device that controls the irradiation direction of the headlight, wherein the control device provides (b-1) a light source presence counter that acquires information on the presence of a light source of a region ahead of the vehicle per predetermined time interval Δt from the light source detector and counts the number of times the light source of a region ahead of the vehicle changes from not present to present, (b-2) a threshold-reached judging section that judges whether or not the number of times counted by the light source presence counter has reached a predetermined threshold value α within a predetermined amount of time (Tm), and (b-3) a beam maintaining section that, when the number of times counted by the light source presence counter is judged to have reached the predetermined threshold value by the threshold-reached judging section, keeps the headlight at low beam for a predetermined amount of time (Tp).