Projector with rotatable projection lens

A projector comprising:

• an image forming panel for displaying images;
• a light source that illuminates the image forming panel;
• a housing that houses the image forming panel and the light source, and includes a concave, a first surface, a second surface intersecting the first surface, and a third surface facing the second surface;
• and
• a projection lens disposed in the concave and attached to the first surface, the projection lens including a first holding member through which light with a first optical axis passes, a first reflective member which bends the first optical axis to form a second optical axis, and a second holding member through which the light with the second optical axis passes,
• wherein the projection lens is rotatable around the first optical axis between a first position where the second holding member faces along the long side direction of the first surface and a second position where the second holding member protrudes from the second surface in a side view, and
• wherein the projector further comprises:
• a drive unit that drives the projection lens between the first position and the second position;
• an angular position sensor that detects an angular position of the projection lens around the first optical axis;
• a power switch that functions as an operation switch for starting/stopping power supply to each part in the housing;
• and
• a control unit that controls the drive unit to drive the projection lens from the first position to the second position based on a detection result of the angular position sensor in a case where the power switch is turned on, and that controls the drive unit to drive the projection lens from the second position to the first position based on the detection result of the angular position sensor in a case where the power switch is turned off.