ILLUMINATION SYSTEM AND VEHICULAR HEADLAMP

摘要

An illumination system has a plurality of light-emitting diodes (R, G, B), at least one light-collimating section (12,12') arranged along a longitudinal axis (25) of the illumination system. The light-collimating sections merges into a light-mixing section (3) having a plurality of side-faces along the longitudinal axis (25). Light propagation in the light-mixing section is based on total internal reflection. The light-mixing section is provided with a light-exit window (13) emitting light towards an imaginary projection surface normal to the longitudinal axis. An end-portion (5) of the light-mixing section is provided with a prismatic protrusion portion (7) for obtaining a light distribution at the imaginary projection surface such that illumination at a first part of the imaginary projection surface is relatively low while illumination at a second part of the imaginary projection surface is relatively high, the first part being obtained at the same side of the longitudinal axis as the prismatic protrusion portion of the light-mixing section.