| 摘要 |
A light diffusion sheet (10) includes wide viewing regions (1) and narrow viewing regions (2). Each of the wide viewing regions (1) includes (i) low refractive parts (22) each having a shape which projects from a light emitting surface toward a light entering surface and (ii) a high refractive part (21) having a refractive index higher than that of the low refractive part (22). Each of the narrow viewing regions (2) includes (a) low refractive parts (24) each having a shape which projects from the light entering surface toward the light emitting surface and (b) a high refractive part (23) having a refractive index higher than that of the low refractive part (24). A display device carries out (i) wide viewing display by incidence of light from a liquid crystal panel (100) side to the wide viewing regions (1) and (ii) narrow viewing display by incidence of light from the liquid crystal panel (100) side to the narrow viewing regions (2), so as to change a viewing angle.
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