Prism sheet having lengthwise wave patterned optical condensing portions and reflection portions, back light unit having the prism sheet and liquid crystal display device having the back light unit

摘要

longitudinal wave pattern of the house with a miner and reflection prism sheet, employing a backlight unit, and the The liquid crystal display device with a backlight unit is disclosed. Described prism sheet is a transparent substrate, the transparent substrate of the lengthwise wave pattern is disposed on the light condensing portion, and having a portion disposed on the light collecting surface and the other side reflecting portions disposed in the transparent substrate, the longitudinal at least one of the converging portion of the height and width of the collection section and a wave pattern is characterized by continuously or discontinuously shaped so as to change according to the length. ; Thus, the light-efficiency-described prism sheet and the production The yield can be improved, a backlight unit employing the above prism sheet manufacturing process is simplified and the manufacturing cost is reduced, the liquid crystal display device employing the backlight unit can be improved front brightness and viewing angle, and the infiltration phenomenon and moire phenomenon prevention can be.