Transmissive OCB liquid crystal display device having...

Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only

Reexamination Certificate

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C349S101000, C349S119000

Reexamination Certificate

active

07868977

ABSTRACT:
Optical compensation elements include first phase plates and second phase plates, which have retardation in a front-plane direction. When a value Δn/Δnλis set by normalizing a retardation amount Δn·d relating to light of each of wavelengths by a retardation amount Δnλ·d relating to light of a predetermined wavelength λ, a normalized value Δn/Δnλin the first phase plate is greater than a normalized value Δn/Δnλin a liquid crystal layer, and a normalized value Δn/Δnλin the second phase plate is less than the normalized value Δn/Δnλin the liquid crystal layer, with respect to light of wavelengths other than the predetermined wavelength.

REFERENCES:
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patent: 2002/0041351 (2002-04-01), Baek
patent: 2003/0011732 (2003-01-01), Ishihara et al.
patent: 2004/0095535 (2004-05-01), Nakagawa
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patent: 499603 (1989-08-01), None
U.S. Appl. No. 11/441,009, filed May 26, 2006, Nakao, et al.
U.S. Appl. No. 12/270,392, filed Nov. 13, 2008, Okita, et al.

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