PRISM SHEET WITH PRISM RIDGES HAVING DIFFERENT LENGTHWISE WAVE PATTERNS, A BACK LIGHT UNIT USING THE SAME, AND A LIQUID CRYSTAL DISPLAY DEVICE EQUIPPED WITH THE BACK LIGHT UNIT

摘要

PURPOSE: A prism sheet, a back light unit using the same, and a liquid crystal display device equipped with the back light unit are provided to prevent moire phenomenon and Newton ring phenomenon.;CONSTITUTION: A prism sheet(100) is composed of a transparent substrate(110) and a prism ridge(120). A transparent substrate is made of permeable polyester resin and supports the prism pattern. The prism ridge is arranged on the transparent substrate and focuses the light which comes through the transparent substrate to an LCD panel. Prism ridges have different lengthwise wave patterns. The lengthwise wave pattern changes according to the length or height of the prism ridge.;COPYRIGHT KIPO 2011