To provide an optical laminated film by which luminance in multilayer structure composed of a diffusion film, a prism film and a prism protection film is improved, both light convergence and light diffusion are achieved with a prism sheet to compensate a viewing angle and blocking can be prevented while preventing scratch produced by a contact surface between an optical sheet and a light guide plate.
The optical laminated film has a diffusion sheet 100 and the prism sheet 200. The diffusion sheet 100 includes a base material layer 110, a light diffusion layer 120 which is formed by containing a light diffusing agent 124 in a first binder resin 122 stacked on an upper surface of the base material layer 110 and a coating layer 130 which is formed by containing beads 134 in a second binder resin 132 stacked on a lower surface of the base material layer 110. The prism sheet 200 is laminated on an upper part of the diffusion sheet 100 and a surface of a projectingly molded prism part 210 is subjected to coating treatment with a plurality of beads 212. The prism sheet 200 performs light convergence and light diffusion.
PARK YOKAN
KIM YOSEI
KIM EICHIN
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