Color wheel unit, light source device, and projection display apparatus

A color wheel unit comprising:

• a color wheel assembly including a color wheel;
• a rod integrator where light having passed through the color wheel is to be incident;
• and
• a holder to which the color wheel assembly and the rod integrator are attached,
• wherein the holder includes:
• a first base configured to be attached to a housing of a projection display apparatus;
• a second base protruding from the first base;
• and
• a third base protruding from the second base and to which the rod integrator is attached,
• wherein the third base includes a first guide wall and a second guide wall configured to guide the color wheel assembly in a case that the color wheel assembly is attached to the holder,
• wherein the color wheel assembly includes:
• a motor coupled to the color wheel and configured to rotationally drive the color wheel;
• a support part configured to rotatably support the color wheel;
• and
• a sensor configured to detect a rotation phase of the motor, and
• wherein the support part includes:
• (i) a first restricting part configured to have a movement thereof restricted and guided by the first guide wall;
• (ii) a second restricting part configured to have a movement thereof restricted and guided by the second guide wall in the case that the color wheel assembly is attached to the holder;
• and (iii) a light shielding wall between the rod integrator and the sensor.