Patent ID: 6282821
Filing Date: 2001-09-04
Classification: G02B,G09F,Y10S,Y10T

Abstract:
A lighted sign, comprising a translucent facing side, sidewall interior surfaces, a backwall interior surface, and a light source within the lighted sign, wherein said facing side comprises a low-loss, partially diffuse-reflective and partially diffuse-transmissive diffuser film having a reflectivity of from about 50% to about 70%, a transmisivity of from about 30% to about 50%, and an absorptivity from about 0% to about 15%, and said interior surfaces comprise an interior surface film and have a reflectivity of at least about 90% as determined by a ASTM E1164-94, wherein the diffuser film provides an increase in luminance efficiency of the lighted sign over a lighted sign that does not have such diffuser film applied therein.