Automotive lighting unit with a light guide plate

Abstract

Automotive lighting unit comprising a first lighting assembly able to backlight a transparent or semi-transparent portion of the front half-shell; the lighting assembly comprising: at least one light-guide plate made of photoconductive material, which is arranged inside the rear casing with a front sidewall of the plate facing the transparent or semi-transparent portion, and with a rear sidewall of the plate facing the rear casing; a first oblong light source which is located inside the rear casing at a first segment of the rear sidewall, and is capable of directing the light produced inside the light-guide plate so that the light travels inside the body of the light-guide plate towards the front sidewall; and a second light source which is located inside the rear casing at a second segment of the rear sidewall complementary to the first segment, and is capable of directing the light produced inside the light-guide plate, so that this light travels inside the body of the light-guide plate towards a first lateral sidewall of the light-guide plate connecting the second segment of the rear sidewall of the light-guide plate to the front sidewall of the same light-guide plate. The light-guide plate is provided with a transversal groove that extends along one of the two faces of the light-guide plate, from the front sidewall of the light-guide plate towards the rear sidewall of the light-guide plate, so as to be interposed between the first lateral sidewall of the plate and the front sidewall of the plate, and is crossed by the light reflected by the first lateral sidewall of the light-guide plate towards the front sidewall of the light-guide plate.