| 摘要 |
PURPOSE: A light diffusion sheet and a backlight unit using the light diffusion sheet are provided to secure excellent optical refraction and reflection, to secure excellent thermal endurance, and to improve hardness of the light diffusion sheet. CONSTITUTION: A light diffusion sheet(1) comprises a transparent base material sheet(2); a light diffusion layer(3) laminated on a surface of the base material sheet and containing beads dispersed within a binder(7); and a sticking-inhibiting layer(4) laminated on a rear face of the base material sheet. The binder of the light diffusion layer contains a thermosetting resin and the sticking-inhibiting layer is a resin layer containing an ionizing radiation curable resin. In the light diffusion sheet, which employs an ionizing radiation curable resin for the binder of the sticking-inhibiting layer, the cross-linking density of the binder is increased, whereby the wear resistance of the sticking-inhibiting layer as well as the wear resistance of the rear face of the light diffusion sheet is increased. Further, possible occurrence of scratches in the sticking-inhibiting layer, which is attributable to the contact between the sticking-inhibiting layer and the beads of the light diffusion layer, is effectively avoided.
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