Light source module and micro projector using the same

A micro projector, comprising:

• a housing, comprising at least one concave portion and at least one positioning hole;
• and
• at least one light source module, dispose in the housing and each of the at least one light source module comprising:
• a light source holder, having at least one convex portion corresponding to the at least one concave portion, wherein each of the at least one convex portion is engaged with the corresponding concave portion, and is adapted to rotate about at least one rotating axis;
• a light source, disposed in the light source holder for emitting a light beam along a beam path;
• a collimator lens holder, disposed in the light source holder;
• a collimator lens, disposed in the collimator lens holder, wherein the collimator lens is located on the beam path and a distance is maintained between the light source and the collimator lens;
• at least one fasten member, adapted to be fastened into the corresponding positioning hole;
• and
• at least one elastic member, fixed to the housing and leaned against the light source holder;
• wherein when the fasten member is fastened into the positioning hole, the fasten member pushes the light source holder such that the light source holder rotates about the rotating axis to a desired angle, and the light source holder presses the elastic member, so an elastic force of the elastic member pushes the light source holder against the fasten member.