Direct type back light
AssigneeLG.Philips LCD Co., Ltd.
InventorsJong Choi, Dae Lim
Life of this patent
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Abstract
A direct type back light includes a case holding a plurality of lamps. The lamps may be “U” shaped and have curves arranged at a centerline of the case to face each other with a gap there between. A reflecting plate is positioned below the plurality of lamps. A luminance control sheet is provided above the reflecting plate and below the lamps in several of, or all of, the gaps. The luminance control sheet may have a lower reflectivity or a higher reflectivity than the reflecting plate to remove a bright line or a dark line in the center of the display, respectively.
Claims19
A direct type back light comprising:
- a case;
- a plurality of lamps fixed inside said case, wherein at least one of said lamps extends part away from proximate one side of said case toward an opposite side of said case and, after a gap, a second one of said lamps extends on toward the opposite side of said case;
- a reflecting plate arranged below said plurality of lamps;
- and
- a luminance control sheet located above said reflecting plate and below said plurality of lamps in an area of said gap, wherein said luminance control sheet has a reflective property which is different than a reflective property of said reflecting plate.
A direct type back light comprising:
- a case;
- a plurality of curved lamps fixed inside said case, wherein ends of said curved lamps reside proximate to a side of said case and the curved portions of said lamps face to each other, with a gap residing between the facing curved portions of pairs of said lamps;
- a reflecting plate arranged below said plurality of lamps;
- and
- at least one luminance control sheet located above said reflecting plate and below said plurality of lamps in an area of at least one of said gap, wherein said luminance control sheet has a reflective property which is different than a reflective property of said reflecting plate.
Dependencies are inferred from the claim text.