Light source module and projection device

A projection device, wherein the projection device comprises at least one light source module, an optical system, at least one light valve and a projection lens, wherein

• at least one light source module is configured to provide a light beam along a first direction, and comprises a first light source group to a third light source group and a first beam-combining device to a fourth beam-combining device, wherein:
• each of a light exiting surface of the first light source group and a light exiting surface of the third light source group is not parallel to a light exiting surface of the second light source group;
• an emitted light of the first light source group is transmitted along the first direction after being reflected by the first beam-combining device and the second beam-combining device;
• an emitted light of the third light source group is transmitted along the first direction after being reflected by the third beam-combining device and the fourth beam-combining device;
• and
• an emitted light of the second light source group is transmitted along the first direction and passes through the first beam-combining device and the third beam-combining device;
• the optical system is disposed on transmission paths of the light beams, and configured to convert the light beams into an illumination beam;
• the at least one light valve is disposed on a transmission path of the illumination beam and configured to convert the illumination beam into an image beam;
• and
• the projection lens is disposed on a transmission path of the image beam and configured to convert the image beam into a projection beam,
• wherein each of the first light source group, the second light source group and the third light source group comprises a plurality of light-emitting elements, and positions of the light-emitting elements of the second light source group in the first direction do not overlap with the light-emitting elements of the first light source group and the light-emitting elements of the third light source group.