| 摘要 |
<P>PROBLEM TO BE SOLVED: To stably supply an optical sheet with good contrast. <P>SOLUTION: This optical sheet includes a functional layer on at least one side of a transparent base plate, includes a diffusion element on the uppermost surface of and/or inside the functional layer, includes a relationship of inequality (I): 0.32<V/T<0.77, and is used for a display element surface. Where T is the total of diffusion reflection intensity measured at each degree between -θ° to +θ° in relation to the diffusion regular reflection direction when the surface layer made of a similar resin as a resin constituting the functional layer is provided on the transparent base plate and visible light is emitted on the surface layer, and V is the total of diffusion reflection intensity measured at each degree between -θ° to +θ° in relation to the diffusion regular reflection direction when visible light is emitted on the optical sheet. <P>COPYRIGHT: (C)2010,JPO&INPIT |
