Backlight unit

Details Backlight unit Backlight unit

2006-09-12

2006-09-12

O'Shea, Sandra (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S612000, C362S339000, C362S330000

Reexamination Certificate

active

07104679

ABSTRACT:
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.

REFERENCES:
patent: 6074069 (2000-06-01), Chao-Ching et al.
patent: 6123431 (2000-09-01), Teragaki et al.
patent: 6612709 (2003-09-01), Yamada et al.
patent: 6648485 (2003-11-01), Colgan et al.
patent: 6799859 (2004-10-01), Ida et al.
patent: 2001/0049893 (2001-12-01), Maas et al.
patent: 2002/0080598 (2002-06-01), Parker et al.
patent: 2003/0128538 (2003-07-01), Shinohara et al.

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