Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2006-05-09
2010-06-15
Nelms, David (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S117000, C349S118000, C349S120000, C349S121000
Reexamination Certificate
active
07738065
ABSTRACT:
There is provide a polarizing plate provided with optical compensation layers capable of performing viewing angle compensation with respect to a liquid crystal cell, providing broadband circular polarization, contributing to thickness reduction, preventing uneven display due to heat, and favorably preventing light leak in black display, and an image display apparatus using the same. The polarizing plate provided with optical compensation layers of the present invention includes a polarizer, a first optical compensation layer, and a second optical compensation layer in the stated order, wherein: the first optical compensation layer contains a resin having an absolute value of photoelastic coefficient of 2×10−11m2/N or less, and has a relationship of nx>ny=nz and an in-plane retardation Re1of 100 to 170 nm; the second optical compensation layer has a relationship of nx=ny>nz, an in-plane retardation Re2of 0 to 50 nm, and a thickness direction retardation Rth2of 30 to 400 nm; and an absorption axis of the polarizer and a slow axis of the first optical compensation layer form an angle of 25° to 65°.
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Korean Office Action dated May 28, 2009 and issued in corresponding Korean Application 2009-022872679.
Chiba Tsuyoshi
Shutou Shunsuke
Takahashi Naoki
Merlin Jessica M
Nelms David
Nitto Denko Corporation
Westerman Hattori Daniels & Adrian LLP
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