Patent ID: 7097306

Claim:
A projection device comprising: a normally white type liquid crystal panel enclosing liquid crystal molecules, the liquid crystal panel for irradiation with light from a light source; a polarizing plate opposing the liquid crystal panel; a rotational adjusting mechanism provided on a chassis so as to be rotatively adjustable within a plane orthogonal to an optical axis (L); and an optical compensation sheet arranged between the liquid crystal panel and the polarizing plate, for compensating birefringence of the liquid crystal molecules, the optical compensation sheet being attached to the rotational adjusting mechanism, wherein birefringence of the light through the liquid crystal panel by the liquid crystal molecules is compensated by rotating the optical compensation sheet, wherein the rotational adjusting mechanism comprises a first rotation plate on which the optical compensation sheet is fitted, and a second rotation plate on which the polarizing plate is fitted, the rotation plates being spaced apart from and opposing one another, so that the rotation plates are rotatively adjustable independently of one another.