Backlight unit for flat panel display and flat panel display...

Details Backlight unit for flat panel display and flat panel display... Backlight unit for flat panel display and flat panel display...

2006-03-30

2008-10-21

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S034000, C359S569000, C359S599000, C362S617000

Reexamination Certificate

active

07440153

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 includes a light source emitting light, a light guide panel having an incident surface facing the light source and totally reflecting light incident through the incident surface toward the flat panel display, a holographic pattern that is formed at at least one of an exit surface of the light guide panel or the opposing surface with a predetermined grating period and diffracts light incident into the light guide panel and a dot pattern containing a plurality of particles dispersed on the holographic pattern at intervals shorter than the grating period and scattering incident light.

REFERENCES:
patent: 2432484 (1947-12-01), Moulton
patent: 6196691 (2001-03-01), Ochiai
patent: 6798574 (2004-09-01), Kim
patent: 2004-234932 (2004-08-01), None
patent: 10-2003-0004021 (2003-01-01), None
patent: 10-2005-0045187 (2005-05-01), None

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