Light source module and projection device

A projection device, comprising a light source module, a light valve, and a projection lens, wherein:

• the light source module is configured to provide an illumination beam, and the light source module comprises a light emitting module and a light homogenizing module, wherein:
• the light emitting module comprises at least one light emitting element, wherein each of the at least one light emitting element is configured to provide a polarization beam;
• and
• the light homogenizing module is configured to homogenize the polarization beams, and generate the illumination beam, wherein along a light travelling direction, the light homogenizing module sequentially comprises:
• a first microlens array element;
• a first lens element;
• a phase adjustment element;
• a second microlens array element;
• and
• a second lens element, wherein
• the first microlens array element is configured to receive the polarization beams, and homogenize the polarization beams to form a plurality of first sub-beams,
• the first lens element is disposed on transmission paths of the first sub-beams and is configured to converge the first sub-beams, wherein the first sub-beams are converged by the first lens element to form a converging beam after passing through the first lens element,
• the phase adjustment element is disposed on a transmission path of the converging beam, wherein the converging beam generates a plurality of sub-converging beams after passing through the phase adjustment element, and at least part of the sub-converging beams has a different phase from the converging beam,
• the second microlens array element is disposed on transmission paths of the sub-converging beams and is configured to homogenize the sub-converging beams to form a plurality of second sub-beams, and
• the second lens element is disposed on transmission paths of the second sub-beams and is configured to converge the second sub-beams, wherein the second sub-beams are converged by the second lens element to form the illumination beam after passing through the second lens element;
• the light valve is disposed on a transmission path of the illumination beam and is 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 is configured to project the image beam out of the projection device.