Patent ID: 7210795

Claim:
A light quantity adjusting device for adjusting light quantity of a projector apparatus, comprising: a substrate having an optical path opening and arranged in a direction substantially perpendicular to an optical path of the projector apparatus, said substrate having a blade guide surface with a level difference in a direction perpendicular to the optical path, a plurality of blade members arranged at a circumferential edge of the optical path opening with a predetermined space therebetween and overlapped with each other, said blade members rotating along the blade guide surface in a state inclined by a predetermined angle with respect to the optical path, a plurality of pins disposed on the substrate for supporting base end portions of the blade members so that the blade members rotate around the base end portions and leading end portions of the blade members open and close the optical path opening, a transmission member mounted on the substrate for engaging the blade members to provide open-close operations, and a drive device for driving the transmission member to rotate the blade members to open and close the optical path opening.