Patent ID: 7703955

Claim:
A vehicular illumination system comprising: a vehicular illumination unit whose light distribution is changeable; a detection unit that detects an illumination target with respect to which the light distribution of the vehicular illumination unit is controlled; an acquisition unit that acquires a steering angle of a subject vehicle; and a control unit that is capable of at least two types of light distribution control, in each of which the processing load of computation is different and the light distribution control includes a predictive light distribution control that predicts the relative displacement between the subject vehicle and the illumination target with a detection result of the detection unit as a reference and controls the light distribution of the vehicular illumination unit based on a prediction result, and that controls the light distribution of the vehicular illumination unit by selecting a light distribution control having a small processing load when the steering angle acquired by the acquisition unit is equal to or greater than a predetermined steering angle.