Illumination – Edge lighted panel – Light guide
Reexamination Certificate
2008-04-29
2008-04-29
Payne, Sharon E. (Department: 2875)
Illumination
Edge lighted panel
Light guide
C362S606000, C362S617000, C362S620000, C362S623000, C362S625000, C362S626000, C362S628000, C362S629000
Reexamination Certificate
active
11412843
ABSTRACT:
A backlight unit for a flat panel display and a flat panel display apparatus having the same. The backlight unit for a flat panel display displaying a predetermined image includes: a light source which emits light; a light guide panel having an incident surface facing the light source and which totally reflects light incident through the incident surface toward the flat panel display; and a holographic pattern that includes a plurality of diffraction gratings that are continuously repeated on at least one of an exit surface of the light guide panel and the opposing surface and diffracts light incident into the light guide panel. A depth of the diffraction grating progressively increases away from the incident surface along a length direction of the light guide panel. The backlight unit for a flat panel display and the flat panel display apparatus having the same have a simple structure that can acquire surface light using a holographic pattern while achieving uniform brightness distribution across the entire light-emitting surface.
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Choi Jin-Seung
Choi Yoon-sun
Kim Jin-hwan
Lee Su-mi
Min Jee-hong
McMillan Jessica L
Payne Sharon E.
Samsung Electro-Mechanics Co. Ltd.
Sughrue & Mion, PLLC
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