Patent attributes
There is provided a backlight unit that is capable of making it possible to highly condense light while simultaneously reducing costs. A backlight unit according to an embodiment of the present invention includes a light source for generating light; a lamp housing installed to cover the light source and for reflecting the light; and a light guide panel whereon there are formed a plurality of engraved patterns with a specific gap and a specific depth at the lower surface thereof, and wherein the vertical angle of the engraved pattern, which faces an out-coming surface of the light guide panel, is in a range of 30˜95°. Accordingly, it can be applicable to display panels of various sizes and a picture is improved at the same time. Also, in the backlight unit, it is possible to get rid of at least one of a prism sheet, a diffusion sheet and a reflecting sheet, thereby reducing costs. Moreover, this backlight unit can obtain a highly condensed light by using a light emitting diode that controls the curvature to condense the out-coming light within a specific angle.
