Patent ID: 6024462
Filing Date: 2000-02-15
Classification: F21S,F21Y,G02B,G02F

Abstract:
Apparatus for displaying a static image, said static image having portions which are to be illuminated at relatively low intensity and portions which are to be illuminated at relatively high intensity, said apparatus comprising:(a) a hollow light guide having a non-diffusely highly reflective inner rear surface and a non-diffusely partially transmissive, non-diffusely partially reflective front surface, said front surface bearing said static image, said front surface having high reflectivity and low transmissivity adjacent to said portions of said static image which are to be illuminated at relatively low intensity, said front surface having low reflectivity and high transmissivity adjacent to said portions of said static image which are to be illuminated at relatively high intensity;(b) a light source for emitting light into said light guide; and(c) a prismatic film mounted in front of said front surface.