Patent ID: 7324277
Filing Date: 2008-01-29
Classification: G03B

Abstract:
1. A double-sided image film screen for an image projector, having a thickness (A) of 10 μm to 400 μm, and comprising: a transparent material; and a light-refracting material contained in or deposited on the transparent material at each side of the film screen, wherein the light-refracting material has a an index of refraction of 2.5 to 3.0; wherein the light-refracting material has a content (C) ranging from a weight ratio of 800 ppm to a weight ratio of 90,000 ppm; and wherein the thickness (A) of the film screen, the index of refraction of the light-refracting material, and the content (C) of the of the light-refracting material mutually interact such that an image projected from a single projector is dividedly displayed on front and rear surfaces of the film screen, to enable simultaneous display of the image at the front and rear surfaces of the film screen while eliminating a hot spot.