Lighting module for a motor vehicle headlight comprising a plurality of light sources and a primary optical element for forming several light patterns that are contiguously aligned transversely and controlled independently of one another to participate in the formation of a pixel light beam, the primary optical element being associated with said plurality of light sources each of which is associated with a light pattern, each light pattern being divided into an upper portion and a lower portion which are lit simultaneously and inseparably, the upper portion being delimited transversely by two vertical edges (20A, 20B) for each of which the light intensity decreases according to a first determined gradient, and the lower portion being delimited transversely by two vertical edges (22A, 22B) for each of which the light intensity decreases according to a second determined gradient lower than said first determined gradient, the primary optical element comprising light guides each associated with one or more of the light sources and a light output face, each light guide extending overall longitudinally from a rear input face for the light emitted by an associated light source to a front light output face, the primary optical element also comprising a front lens delimited longitudinally to the front by a face for shaping the light patterns and to the rear with a transverse vertical face which coincides with the plane of the output faces of the light guides, the lighting module being characterized in that each light guide has a transverse cross section of rectangular form and thus has two vertical lateral faces and two top and bottom faces, the lower part of the light patterns being produced by joining an upper portion of each lateral face of each light guide to the lateral faces of the adjacent light guides via a transverse bridge produced in the same material as and in a single piece with the light guides, each bridge being arranged transversely coinciding with the upper portion of the output face of the light guides, the upper parts of the light guides thus connected by the bridges forming a single light-shaping layer which extends transversely over the entire row of the light guides and having a single output face extending transversely all along the row of light guides, the upper part of the light patterns being produced by portions of the lateral faces of the light guides that are separated transversely from one another. the primary optical element being associated with said plurality of light sources each of which is associated with a light pattern, each light pattern being divided into an upper portion and a lower portion which are lit simultaneously and inseparably, the upper portion being delimited transversely by two vertical edges (20A, 20B) for each of which the light intensity decreases according to a first determined gradient, and the lower portion being delimited transversely by two vertical edges (22A, 22B) for each of which the light intensity decreases according to a second determined gradient lower than said first determined gradient, the primary optical element comprising light guides each associated with one or more of the light sources and a light output face, each light guide extending overall longitudinally from a rear input face for the light emitted by an associated light source to a front light output face, the primary optical element also comprising a front lens delimited longitudinally to the front by a face for shaping the light patterns and to the rear with a transverse vertical face which coincides with the plane of the output faces of the light guides, the lighting module being characterized in that each light guide has a transverse cross section of rectangular form and thus has two vertical lateral faces and two top and bottom faces, the lower part of the light patterns being produced by joining an upper portion of each lateral face of each light guide to the lateral faces of the adjacent light guides via a transverse bridge produced in the same material as and in a single piece with the light guides, each bridge being arranged transversely coinciding with the upper portion of the output face of the light guides, the upper parts of the light guides thus connected by the bridges forming a single light-shaping layer which extends transversely over the entire row of the light guides and having a single output face extending transversely all along the row of light guides, the upper part of the light patterns being produced by portions of the lateral faces of the light guides that are separated transversely from one another.