Patent ID: 6626539
Filing Date: 2003-09-30
Classification: H04N

Abstract:
An apparatus for use in a color video projection display system, the apparatus comprising:at least one panel arranged within the system to receive via an input optical path incident light of one or more designated colors generated from a light source, the panel modulating the incident light of at least one of the colors in accordance with a corresponding applied signal, modulated incident light of the one or more colors being directed within the system from the panel via an output optical path so as to generate a viewable display of the system; and at least one low-retardance film arranged within one of (i) the input optical path of the system between an input optical path polarizer and the at least one panel and (ii) the output optical path of the system between the at least one panel and an output optical path polarizer, so as to increase a contrast ratio of the viewable display, wherein the single low-retardance film comprises a film having a retardance of 25 nanometers.