Patent ID: 8920006

Claim:
A lighting or signaling device for a motor vehicle, said lighting or signaling device comprising: an optical axis and comprising at least one light source; at least one light guide for guiding light rays between said at least one light source and an exit face, said at least one light guide having an entry edge associated with said at least one light source; said at least one light guide for said light rays is formed by a sheet; said sheet being generally planar and comprising a curved rear edge adapted to provide reflection of said light rays towards said exit face; and a curved shape of said curved rear edge being defined by an arc of a parabola whose geometric axis is parallel to a substantially horizontal plane and also being associated with a profile of said exit face so that at least some of said light rays emerging from said exit face have a direction contained in said substantially horizontal plane containing said optical axis of said lighting or signaling device; said at least one light source being situated at substantially a focus of said curved shape; wherein said at least one light guide has an end piece having an end piece thickness that is greater than a sheet thickness of said sheet, said end piece further comprising a generally convex surface relative to said exit face and defining a lens having a focus situated generally at said exit face of said sheet; said end piece being formed by a solid having a cylindrical, elliptical or pseudo-elliptical profile in cross-section that defines said convex surface and that causes divergence of at least some of said light rays; said exit face of said sheet be disposed at said focus to partially collimate emerging light rays from said end piece and allows said divergence of at least some of said light rays; wherein said lighting or signaling device is adapted for use on a motor vehicle.