Headlamp device for vehicle

摘要

Front viewability during turning may be enhanced by a headlamp device for a vehicle arranged to perform swivel control The headlamp device is arranged so that when a vehicle 2 is turning around a right curve with low beam, the vehicle velocity V and the estimated horizontal G value are used to calculate the curve turning radius R, which is then used together with the vehicle velocity R to calculate the driver viewing point angle theta to which the leftward deviation beta of the highest light intensity position in the light distribution pattern PL for low beam is added to calculate the target swivel angle alpha on the basis of which the lighting fixture unit of the headlamp 10 R is swung over the target swivel angle alpha so that light beam is emitted toward a region surrounding the driver viewing point EP on the road ahead of the vehicle in the forward direction. In this arrangement, the driver viewing point angle theta can be calculated using only from the vehicle velocity data as a parameter without using steering angle data, making it possible to simplify the operation for swivel control and to eliminate the need to use a steering angle sensor.