Patent ID: 7652819

Claim:
A projection-type image display apparatus comprising: an optical engine that modulates a laser light according to an image signal and outputs a modulated light; a screen including a Fresnel lens that collimates the modulated light from the optical engine and outputs a collimated light, and a diffusion member that diffuses the collimated light from the Fresnel lens and outputs a diffused light; a driver that continually moves either one of the Fresnel lens and the diffusion member on a predetermined trajectory within a plane parallel with the screen; a casing that supports the optical engine, the Fresnel lens, the diffusion member, and the driver; and a spring member that couples either one of the Fresnel lens and the diffusion member with the casing, wherein the spring member includes a first deformation plane flexible in a first direction within the plane, a first plate spring having the first deformation plane positioned at a first side of a bent portion, a second deformation plane flexible in a second direction substantially perpendicular to the first direction within the plane, and a second plate spring having the second deformation plane positioned on a second side of the bent portion, and spring member is not flexible in a direction perpendicular to the plane.