Patent ID: 6163348
Filing Date: 2000-12-19
Classification: G02F,G09G,H04N

Abstract:
An image display apparatus comprising:a projection optical system including at least one image forming device for forming a color image and an image enlarging optical system for enlarging the color image formed by the at least one image forming device; anda screen including first and second faces opposed to each other, with a photoconductive layer and an optical modulation layer situated between said first and second faces for modulating an intensity of environmental light incident onto the optical modulating layer from the first face based on a variance in impedance of said photoconductive layer,wherein the image displayed on said screen is displayed in a reflective type direct viewing liquid crystal display mode,wherein said impedance is varied in accordance with an intensity of incident light emitted from said projection optical system onto said second face, andwherein contrast of an image displayed on the image display apparatus does not deteriorate even if there is an increase in environmental brightness.