Patent ID: 8789991

Claim:
An optical system for a motor vehicle, said optical system performing at least one main optical function and comprising: a diffusion screen; at least one light source, each light source of the optical system producing a set of rays of light to be propagated in the diffusion screen, said at least one light source comprising a plurality of LEDs; wherein the screen is in the form of a sheet, curved or substantially planar, with an upper lateral flange and a lower lateral flange which are joined by a periphery having a rear face and a front edge; the main function is performed essentially via an output face constituted by the front edge of the diffusion screen; and at least one part of the upper lateral flange diffuses a light beam contributing to the performance of at least one of the main function or a complementary optical function; wherein said main function and said complementary optical function are different and said plurality of LEDs are arranged opposite said periphery such that when said plurality of LEDs are active, light beams project from said front edge in a first direction and from said upper lateral flange in a second direction that is different from said first direction.