Seiko Epson Corporation

Takeshi Utagawa

Toshio Matsumiya

Kunihisa Nakamura

Daisuke Hayashi

Osamu Fujimaki

A projector includes: a display device which modulates illumination light; a projection lens which projects modulation light produced by the display device; and a holding device which has a holder member supporting the display device, a frame member supporting the projection lens and functions as a base capable of supporting the holder member, and an expanding and contracting member disposed between the frame member and the display device, wherein a temperature coefficient for the expansion and contraction of the expanding and contracting member in the direction of the optical axis of the projection lens corresponds to a temperature coefficient for the increase and decrease of the focal distance of the projection lens.

Projector comprising an expanding and contracting member configured to move a holding device when a temperature is changed

Projector comprising an expanding and contracting member having a temperature coefficient that counters the increase and decrease of a focal distance of a projection lens caused by temperature changes

A compensation element adjustment mechanism used with a light modulation device and a polarization plate includes: an optical compensation element disposed between the light modulation device and a polarization plate; a frame for supporting the optical compensation element, and having a pair of shaft members disposed at positions opposed to each other on a periphery of the optical compensation element; a support holder to be fixed with respect to the light modulation device, and for rotatably supporting the pair of shaft members; and a fixing section for restricting a displacement of the frame to the support holder by an elastic contact.

Compensation element adjustment mechanism and projector

A projector includes an image projection device, an exterior chassis accommodating the substantially L-shaped image projection device, and a ventilation device configured to block leakage light and to insulate sound of the projector and to discharge air inside the exterior chassis to the outside through an air outlet formed on an end face located in a direction of projection. The image projection device includes a light source device, an optical modulation device, and a projection optical device. The ventilation device includes an axial fan with a suction port and a discharge port. An air outlet duct bends air discharged from the discharge port at an angle of substantially ninety degrees by a vertical wall substantially perpendicular to the discharging direction of air from the discharge port of the axial fan towards a side receding from the projection optical device to lead to the air outlet of the exterior chassis.

Growing community of inventors

Matsumoto, Japan

Takeshi Utagawa