Backlight unit and liquid-crystal display device using the same

Details Backlight unit and liquid-crystal display device using the same Backlight unit and liquid-crystal display device using the same

2007-02-14

2009-10-06

Tso, Laura (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S613000, C362S622000

Reexamination Certificate

active

07597469

ABSTRACT:
An edge-light type backlight unit reduces the color unevenness on the display screen caused by the arrangement of point-shaped light sources (e.g., LEDs) in a point-shaped light source unit comprising a set of point-shaped light sources aligned. The backlight unit includes at least one point-shaped light source unit having point-shaped light sources arranged in a single direction in a predetermined order, the light sources emitting monochromatic light of different colors. The unit further comprises a first optical filter for limiting or controlling transmission of the monochromatic light emitted from one of the light sources disposed at one end of the light source unit, and a second optical filter for limiting or controlling transmission of the monochromatic light emitted from another of the light sources disposed at the other end thereof. The first and second filters are selectively formed on a first or second light guide plate or a diffusing plate.

REFERENCES:
patent: 6039452 (2000-03-01), Iimura
patent: 7040794 (2006-05-01), Bernard
patent: 7111974 (2006-09-01), Mizutani et al.
patent: 7128457 (2006-10-01), Hashimoto
patent: 2005/0007753 (2005-01-01), Van Hees et al.
patent: 2005/0243243 (2005-11-01), Koganezawa
patent: 2006/0262564 (2006-11-01), Baba
patent: 2004-311353 (2004-11-01), None
patent: 2005-117023 (2005-04-01), None

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