PRISM SHEET, BACK LIGHT ASSEMBLY AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME

摘要

A prism sheet, a back light assembly and a liquid crystal display device having the same are provided to increase a viewing angle while increasing front brightness by regularly or irregularly forming grooves at upper ends of prisms. A prism sheet(100) includes a transparent plate(110) and a light concentrating part(120). The light concentrating part is formed of prisms(122) connected with one another on the transparent plate, having grooves(124) formed at upper ends at predetermined gaps along a length direction. The prisms have triangular sections.