Patent ID: 9193297
Filing Date: 2015-11-24
Classification: B60Q,F21S

Abstract:
1. A vehicle light distribution control device comprising: an illumination device configured to irradiate illumination light toward a front of a vehicle, the illumination device being controlled such that a light distribution pattern is changed among a high beam pattern, a low beam pattern formed by a low beam shade and a split beam pattern formed by a high beam shade, the split beam pattern being arranged such that part of an area in the high beam pattern is shielded by the high beam shade with boundaries set as cut-off lines, and the illumination device being controlled to swivel such that an optical axis direction varies in a substantially horizontal direction; and a control unit configured to control the illumination device, the control unit being configured to determine a target swivel angle of the illumination device in the substantially horizontal direction based on a steering angle of a steering wheel and a vehicle speed; the control unit being configured, when a vehicle ahead has been detected, to change the light distribution pattern formed by the illumination device to the split beam pattern, and to control a position of the cut-off line of the split beam pattern so as not to irradiate the illumination light to the vehicle ahead, and the control unit being configured, when the vehicle ahead becomes undetectable, to maintain the split beam pattern while controlling the position of the cut-off line of the split beam pattern in such a manner that a shielded area of the split beam pattern gradually reduces, and, after the shielded area becomes smaller than or equal to a predetermined reference, the control unit being configured to change the light distribution pattern from the split beam pattern to the high beam pattern; the cut-off line of the split beam pattern being moved in a direction of the target swivel angle to gradually reduce the shielded area and then close the split beam pattern.