Patent ID: 8334944

Claim:
A display apparatus comprising: a display panel including a plurality of gate lines, a plurality of data lines crossing the gate lines in a plan view of the display apparatus, and a plurality of pixels defined by the gate lines and the data lines; and a backlight unit disposed at a rear portion of the display panel to supply light to the display panel, wherein the backlight unit comprises: a light source generating the light; and an optical sheet including: a plurality of prism patterns having a plurality of peaks and a plurality of valleys, which are formed on a first surface of the optical sheet facing the display panel, a first plurality of diffusion patterns disposed at the plurality of peaks, and a second plurality of diffusion patterns disposed at the plurality of valleys, wherein the first plurality of diffusion patterns and the second plurality of diffusion patterns overlap the plurality of pixels, and wherein the first plurality of diffusion patterns is disposed closer to the display panel than the second plurality of diffusion patterns.