Illumination arrangement with reduced depth for a vehicle headlight

A headlight for road vehicles comprising an illumination arrangement, the illumination arrangement being formed of a plurality of contiguous elementary cells, each comprising a light source, defined by an emission surface having a horizontal dimension and a vertical dimension and capable of emitting a luminous flux, and an optical system capable of conveying said luminous flux at a predetermined solid angle about a predetermined direction, said elementary cells being disposed so as to generate overall a predetermined distribution of light emission, wherein the emission surface of each light source is in the shape of a horizontally elongate polygon, said polygon being constituted by a horizontally extending portion, having a vertical width which is constant along the horizontal direction, and an inclined cut-off generating portion, which extends from one end of the horizontally extending portion and has an upper side which is inclined to the horizontal, and wherein the horizontal dimension of the emission surface is defined as its maximum width in the horizontal direction and the vertical dimension of the emission surface is defined as its maximum width in the vertical direction, the vertical dimension being less than 1 mm and the ratio between the horizontal dimension and the vertical dimension being greater than 2.