A lighting system (2) of a motor vehicle is provided; the motor vehicle lighting system including: a lighting device capable of emitting a light beam, a projection device having a projection lens, andan array of micro-mirrors having micro-mirrors mounted in a pivoting manner about a pivot axis. Each micro-mirror is capable of pivoting to the maximum by an angle, referred to as the maximum pivoting angle. The light beam emitted by the lighting device exhibits an angle at the upper vertex greater than the maximum pivoting angle and wherein the at least one projection lens viewed in a frontal section has the form of a rectangle having a longitudinal side extending in a direction that is substantially parallel to the pivot axis of the micro-mirrors.