OPTICAL SHEET AND BACK LIGHT ASSEMBLY OF LUQUID CRYSTAL DISPLAY EQUIPPED WITH THE PRISM SHEET

摘要

An optical sheet and a back light assembly of a liquid crystal display with the optical sheet are provided to improve a viewing angle and luminance, thereby obtaining a more excellent optical characteristic result. An optical sheet comprises a body portion(210) on which light is incident, and a plurality of protrusions(220) which is formed with a predetermined thickness on the body portion. The protrusion condenses, diffuses, or reflects the light. The protrusion has many sides which slope to the surface of the body portion with a predetermined angle, and a width of the sides becomes narrower as a height of the sides becomes higher and higher. A rounding portion(225) having a predetermined radius of curvature is formed in a top of the protrusion.