Backlight unit

Details Backlight unit Backlight unit

2008-10-28

2010-02-23

Sember, Thomas M (Department: 2885)

Illumination

Edge lighted panel

Light modifier with emission face combined with light guide...

C362S620000, C362S330000, C362S331000, C362S339000

Reexamination Certificate

active

07665876

ABSTRACT:
A backlight unit includes: light guide plate surrounded by main surfaces and end surfaces, one end surface facing a light source designated as entrance surface, one main surface designated as emitting surface; first prism sheet provided above the light guide plate, having first prism columns on a top surface and second prism columns on a bottom surface, each first prism column has first ridge line parallel or perpendicular to the entrance surface, each second prism column has second ridge line extending in a different direction from the first ridge line; second prism sheet provided above the first prism sheet, having third prism columns abutting each other on a top surface, each third prism column has third ridge line extending in a direction different from the first and second ridge lines; and reflection sheet facing the light guide plate below the light guide plate.

REFERENCES:
patent: 6151169 (2000-11-01), Kim
patent: 6347873 (2002-02-01), Hosseini et al.
patent: 2008/0094552 (2008-04-01), Kim et al.
patent: 2009/0002592 (2009-01-01), Ma et al.
patent: 07-198913 (1995-08-01), None
patent: 2739730 (1998-01-01), None

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