Projector with thermally managed optical path shifting module and thermoelectric panel cooling

A projector comprising:

• a first panel module that has a first axis as an optical axis and outputs first image light that is modulated first light;
• a second panel module that has a second axis perpendicular to the first axis as an optical axis and outputs second image light that is modulated second light;
• a third panel module that has the first axis as an optical axis and outputs third image light that is modulated third light;
• a light combiner having a first light incident surface on which the first image light is incident, a second light incident surface on which the second image light is incident, a third light incident surface on which the third image light is incident, and a light exiting surface which has the second axis as an optical axis and via which projection image light exits, the projection image light being a combination of the first image light, the second image light, and the third image light;
• a projection optics module that projects the projection image light output from the light combiner;
• and
• an optical path shifting module that shifts an optical path of the projection image light that is output from the light combiner and enters the projection optics module,
• wherein the optical path shifting module includes
• an optical path changing member disposed in the optical path between the light combiner and the projection optics module,
• a first actuator that includes a first magnet and a first coil and swings the optical path changing member around a first swing axis along the first axis, and
• a second actuator that includes a second magnet and a second coil and swings the optical path changing member around a second swing axis along a third axis perpendicular to each of the first axis and the second axis,
• the first panel module includes
• a liquid crystal panel for first light that outputs the first image light,
• a vapor chamber for first light that extends from the liquid crystal panel for first light along the third axis, transfers heat to and from the liquid crystal panel for first light, and diffuses the received heat in the vapor chamber for first light,
• a thermoelectric conversion device for first light that transfers heat to and from the vapor chamber for first light, and
• a heat sink for first light that cooperates with the vapor chamber for first light to sandwich the thermoelectric conversion device for first light and transfers heat to and from the thermoelectric conversion device for first light, and
• the first actuator and the second actuator are each disposed at a position separate from a side end facing the optical path shifting module out of side ends of the thermoelectric conversion device for first light,
• a panel temperature sensor that detects a temperature of the liquid crystal panels for first light, and
• a shift control section that controls the optical path shifting module,
• wherein when the temperature of the liquid crystal panel for first light detected by the panel temperature sensor is lower than a threshold, the shift control section switches shift control from first shift control in which a position of each pixel contained in the projection image light output from the light combiner is sequentially shifted from a first position to a plurality of shift positions to second shift control in which the position of the pixel is sequentially shifted to the first position and one of the plurality of shift positions.