Light projector module

A light projector module, comprising:

• a base plate with two opposite sides both extending in a longitudinal and a transverse direction,
• a light source mounted on one side of the two opposite sides for transmitting a light beam in a transmission plane that is perpendicular to the two opposite sides and parallel to the longitudinal direction,
• a micro-electro-mechanical-system (MEMS) scanning assembly having an arm which is mounted on and extends from the other side of the two opposite sides and having a scanning mirror which is movably mounted on the arm for scanning the light beam over a display area, and
• a light guide mounted on the base plate or the arm for guiding the light beam from the light source towards the scanning mirror,
• wherein the light guide is configured to guide the light beam in a guiding plane that is parallel to the longitudinal direction,
• wherein the light source is configured to emit a first, a second and a third partial light beam each of a different wavelength, which partial light beams are mutually spaced in the transverse direction, and includes a beam combiner to combine the first, second and third partial light beams into said light beam, and
• wherein the beam combiner has
• a first section with a first reflective surface for diverting the first partial light beam in the transverse direction towards the second partial light beam and a first wavelength-selective surface which is reflective for the diverted first partial light beam and transmissive for the second partial light beam for co-linearly combining the diverted first and the second partial light beams into an intermediate light beam, and
• a second section with a second reflective surface for diverting the third partial light beam in the transverse direction towards the intermediate light beam and a second wavelength-selective surface which is reflective for the diverted third partial light beam and transmissive for the intermediate light beam for co-linearly combining the diverted third partial light beam and the intermediate light beam into said light beam.