Multicolor light mixing module

A multicolor light mixing module suitable for providing a multicolor laser beam to a laser projection device, the multicolor light mixing module comprising:

• a laser source comprising at least two first lighting units, a second lighting unit, and a third lighting unit, the at least two first lighting units emitting a first color light toward a light-emitting direction, the second lighting unit emitting a second color light toward the light-emitting direction, and the third lighting unit emitting a third color light toward the light-emitting direction, wherein the at least two first lighting units, the second lighting unit, and the third lighting unit are sequentially arranged along an arrangement direction, and the arrangement direction is perpendicular to the light-emitting direction;
• and
• a light-mixing unit disposed opposite to the laser source and having a first dichroic surface, a second dichroic surface, and a reflective surface, the first dichroic surface being oblique to reflect the first color light to travel along a light-mixing axis and to allow the second color light and the third color light to pass through and be incident onto the second dichroic surface, and the first dichroic surface, the second dichroic surface, and the reflective surface being sequentially arranged in parallel along a normal axis of the first dichroic surface, wherein the second dichroic surface allows the third color light to pass through and be incident onto the reflective surface and reflects the second color light to pass through the first dichroic surface and travel along the light-mixing axis, and the reflective surface reflects the third color light to sequentially pass through the second dichroic surface and the first dichroic surface and travel along the light-mixing axis, so that the first color light, the second color light, and the third color light are mixed along the light-mixing axis to form a multicolor laser beam.