Patent ID: 7824090
Filing Date: 2010-11-02
Classification: G02B,G02F

Abstract:
1. A backlight unit, comprising: at least one light source to emit light; a light guide plate to emit surface light through an incident surface using the light emitted from the light source; a lamp housing arranged to fix the light source, condensing the light emitted from the light source to the incident surface of the light guide plate; a reflecting plate arranged on a side of the light source opposite the light guide plate to reflect light to the light guide plate; a prism sheet arranged above the light guide plate to condense the light emitted to the light guide plate; and at least one diffusion sheet arranged above the prism sheet and provided with a plurality of diffusion patterns diffusing the light from the prism sheet in at least two directions, wherein the diffusion sheet includes a first diffusion sheet and a second diffusion sheet.