Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2011-03-01
2011-03-01
Nelms, David (Department: 2883)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S117000, C349S118000, C349S119000
Reexamination Certificate
active
07898628
ABSTRACT:
A transverse electric field mode liquid crystal display device capable of improving the viewing angle characteristic in black display at an oblique viewing angle with a simple structure is provided. In the liquid crystal display device in accordance with one aspect of the present invention, (a) the product (Δn·d) of the thickness d of the liquid crystal layer sandwiched between a pair of substrates and the refractive index anisotropy Δn of the liquid crystal layer is within the range of 320 nm±20 nm, (b) each of the pair of polarizing plates is composed of a polarizer and transparent protective films sandwiching the polarizer therebetween, and the polarizing plate and the substrate are directly stuck together without any retardation film or optical compensation layer interposed therebetween, (c) the delay phase axis of the transparent protective film that protects the liquid crystal layer side is generally parallel with the absorption axis of the polarizer in each of the pair of polarizing plates, and (d) the in-plane retardation Re is equal to or less than 10 nm, and the retardation in thickness direction Rth is no less than 30 nm and no greater than 40 nm for the transparent protective film that protects the liquid crystal layer side in each of the pair of polarizing plates.
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Ishikawa Yoshimitsu
Kurata Tetsuyuki
El Shammaa Mary A
Mitsubishi Electric Corporation
Nelms David
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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