| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a transmission type screen for an interactive board which can reduce a bright line and the like while having a high front brightness and a proper viewing angle, and can display an excellent image, and to provide an interactive board and an interactive board system which are provided with the same. <P>SOLUTION: A screen 10 for an interactive board 50 includes a prism layer 11, a light diffusion layer 12 provided on an emission side with respect to the prism layer 11, and a substrate layer 13 provided on the emission side with respect to the prism layer 11. The light diffusion layer 12 contains a first diffusion material and a second diffusion material which are two types of diffusion materials having different diffusion characteristics, the first diffusion material has a larger refractive index difference between the first diffusion material and a base material of the light diffusion layer 12 than a refractive index difference between the second diffusion material and the base material of the light diffusion layer, and has a larger diffusion action than that of the second diffusion material, and the sum of the surface area of the second diffusion material existing per unit area when the light diffusion layer 12 is viewed in a normal direction of a screen surface is twice or more of the unit area. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
