| 摘要 |
PROBLEM TO BE SOLVED: To provide a large image screen projector with a screen in which gaps in bonding areas are inconspicuous, and to provide a manufacturing method for the screen. SOLUTION: A plurality of directional optical diffusion sheets are arranged and stuck together on an optical diffusion surface sheet, which has a predetermined haze value and diffuses incident light isotropically. In this case, the directional optical diffusion sheets have the properties in which an amount of scatter of light entering at a predetermined angle is large and an amount of scatter of light entering in directions other than that angle is small. Thus, even in the case where a large screen is formed using the directional scattering sheet divided into a plurality of areas, the boundaries between the divide areas are made hardly visible by the light diffusing action of the light diffusion surface sheet. Accordingly, more natural image projection is possible. COPYRIGHT: (C)2006,JPO&NCIPI
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