LIGHT-DIFFUSION SHEET, METHOD FOR MANUFACTURING SAME, AND TRANSMISSION DISPLAY DEVICE PROVIDED WITH THIS LIGHT-DIFFUSION SHEET

摘要

A light-diffusion sheet (1) includes a light diffusing section (2) which is provided on a substrate (6) and has a plurality of recessed parts (5) each of which has a v-shaped cross section. A light blocking section (3) is provided in each of the plurality of recessed parts (5), and a reflecting section (4) made of mesoporous silica (8) is provided so as to close a gap between the light blocking section (3) and the each of the plurality of recessed parts (5). The mesoporous silica (8) causes the reflecting section (4) to have a low refractive index. This causes a difference in refractive index between the reflecting section (4) and the light diffusing section (2), so that entrance light having entered the light-diffusion sheet (1) can be totally reflected with great efficiency. Further, since it is unnecessary to use an expensive high refractive index material for the light diffusing section (2), the light-diffusion sheet (1) can be manufactured at a reduced manufacturing cost.