| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible industrial material sheet having a rear projection screen function that allows wide angle display; and to provide a rear projection system using the same.SOLUTION: The industry material sheet (3) is a light diffusion transparent sheet containing a composite base material with a flexible resin layer laminated on one side of knitted fabric including inorganic filament thread. The industry material sheet has optical characteristics such that the refractive index n1 of the flexible resin layer, and an absolute value |n1-n2| of the difference between the refractive index n2 of the inorganic filament thread satisfies expression 1: 0.02<|n1-na|≤0.10, and that at least one layer of the flexible resin layer has a sea-island structure, wherein a sea component is a flexible resin and an island component is a particulate light diffusing material. Further, the rear projection system is obtained which recognizes a clear video, even if observed from an oblique direction, by arranging a video projecting device in the rear. |
