Backlight unit using wire-grid polarizer and liquid crystal...

Details Backlight unit using wire-grid polarizer and liquid crystal... Backlight unit using wire-grid polarizer and liquid crystal...

2006-02-08

2009-11-10

Cariaso, Alan (Department: 2885)

Illumination

With polarizer

C362S606000, C362S618000, C362S625000, C359S486010

Reexamination Certificate

active

07614757

ABSTRACT:
A backlight unit, which can emit one of s-polarized light and p-polarized light using wire-grid polarizer, and a liquid crystal display apparatus employing the backlight unit are provided. The backlight unit includes: a light source radiating light; a light guide plate disposed with the light source at a lateral side of the light guide plate, guiding the light incident on the lateral side from the light source; a wire-grid polarizer formed on a predetermined layer of the light guide plate transmitting a first polarized component of the light through the predetermined layer and reflecting a second polarized component of light; a reflector reflecting the light to un upper surface of the light guide plate; and a polarization converter changing a polarization of the light not emitted through the upper surface of the light guide plate.

REFERENCES:
patent: 5729311 (1998-03-01), Broer et al.
patent: 5751388 (1998-05-01), Larson
patent: 6011602 (2000-01-01), Miyashita et al.
patent: 6288840 (2001-09-01), Perkins et al.
patent: 6712482 (2004-03-01), Kawakami et al.
patent: 2003/0210369 (2003-11-01), Wu
patent: 2005/0078374 (2005-04-01), Taira et al.
patent: WO 02/054119 (2003-08-01), None

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