Elliptical lighting module without screen providing a cut-off beam and headlamp comprising the same

Lighting module (10) for a motor vehicle headlight that performs an illumination beam type with trimming, comprising, arranged from back to front overall along a longitudinal horizontal optical axis (AA), a reflector (12) of elliptic type defining a volume of reflection for light rays and comprising a reflection surface essentially elliptical (18, 20), at least one light source (14) disposed near a first focus (F1) of the reflector (12) and a converging lens (16) whose focal plane is disposed near the second focus (F2) of the reflector (12), the reflector comprising a horizontal flat reflection surface (22), whose upper face (24) is reflective, which delimits vertically downwards the volume of reflection, the flat surface (22) of the reflector (12) an edge of front end (28), called edge trim, which is disposed near the second focus (F2) of the reflector comprising (12), so as to form the cut in the light beam, the flat surface (22) of the reflector (12) being arranged in a horizontal plane passing overall through the foci (F1, F2) of the reflector (12), characterized in that the flat surface of the reflector extends longitudinally rearwardly from its edge trimming, to at least the vicinity of the first focus (F1) of the reflector (12), by the fact that the surface essentially elliptical ( 18, 20) of the reflector (12) is formed by an angular sector part essentially revolution around the longitudinal optical axis (AA), by the fact that the angular sector extends vertically above the flat surface (22) the reflector (12), and by the fact that the light source is a light emitting diode (44) or is formed by the free end of a bundle of optical fibers, and that this source is arranged in the module ( 10) so that its light diffusion axis (BB) is substantially perpendicular to the flat surface (22) of the reflector (12).