| 摘要 |
An optical sheet 60 includes a substrate layer 65, a mat layer 70, and a prism layer 80. The mat layer contains first light-scattering particles 71, second light-scattering particles 72, and a binder resin 73. The refractive index n2 of the second light-scattering particles differs from the refractive index nb of the binder resin and the refractive index n1 of the first light-scattering particles. The relationship between the mean particle diameter d1 of the first light-scattering particles, the mean particle diameter d2 of the second light-scattering particles, and the thickness tb of the mat layer at a position that does not cross the first light-scattering particles or the second light-scattering particles is given below. d2 < tb < d1 |
