| 摘要 |
PROBLEM TO BE SOLVED: To obtain high ray transmittance, excellent light diffusivity and high contrast and to eliminate a see-through phenomenon by incorporating a specific amt. of light selective functional resin beads contg. a specific ratio of neodymium elements and a specific amt. of silicone resin beads having a specific average particle size. SOLUTION: This diffusion plate is formed by incorporating 1 to 25wt.% light selective functional resin beads contg. 0.05 to 20wt.% neodymium elements and 0.01 to 1wt.% silicone resin beads having 3 to 6μm average particle size into the plate. The light selective functional resin beads include the beads formed by uniformly dispersing the powder of neodymium oxide, etc., into the transparent resin or the beads formed by incorporating the neodymium compd. in a bonded or dissolved state into the transparent resin. Such light selective functional resin beads as the latter are more particularly preferable. The silicone resin beads are used to expand the visual field angle of the screen by diffusing projecting light as a light diffusing agent. The silicone resin is not particularly limited.
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