Prism sheet having lengthwise wave patterned prisms and convex diffusers, back light unit having the prism sheet and liquid crystal display device having the back light unit

摘要

A prism sheet having a prism acid and a diffusion portion of a longitudinal wave pattern, a backlight unit employing the same, and a liquid crystal display device having the backlight unit are disclosed. The disclosed prism sheet includes a transparent substrate, a prism acid having a longitudinal wave pattern disposed on the transparent substrate, and a diffusion portion disposed on a groove between the prism acid and another prism acid adjacent thereto, wherein the longitudinal wave The pattern is characterized in that the prism sheet is shaped such that the height of the prism mountain varies continuously with the length.;Therefore, the disclosed prism sheet can secure a wide viewing angle while exhibiting a high light condensing effect, and the backlight unit employing the same can be reduced in thickness and the manufacturing process can be simplified to reduce manufacturing costs, and the liquid crystal employing the backlight unit can be obtained. The display device can prevent wet-out and moiré phenomena.