Patent ID: 7360941
Filing Date: 2008-04-22
Classification: G02B

Abstract:
1. A backlight unit for use in a liquid crystal display, the backlight unit comprising: a light guiding plate comprising a light exiting surface, a light reflective surface, and a light incident surface; a light source unit comprising a substrate and a light source disposed on the substrate, wherein the light source unit is disposed to face the light incident surface of the light guiding plate; and a reflecting sheet comprising a first portion facing the light reflective surface of the light guiding plate, a second portion facing the light exiting surface of the light guiding plate, and a third portion connecting the first and the second portions, wherein the third portion comprises light source exposing parts, wherein the light source comprises a plurality of light emitting diodes, and each of the light emitting diodes is square shaped, and a portion of each corresponding light source exposing part is shaped in a quadrangular pyramid to receive the corresponding light emitting diode.