Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2003-07-29
2008-09-23
Qi, Mike (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S118000
Reexamination Certificate
active
07428029
ABSTRACT:
The present invention relates to an optical film that is excellent in optical properties and can be produced at low cost. In the optical film formed by laminating a transparent polymer film layer and a birefringent layer of a non-liquid crystalline polymer, the birefringent layer satisfies a condition represented by nx≧ny>nz and the in-plane retardation of the transparent polymer film layer is 50 nm or less. In the above formula, nx, ny and nz are the refraction indices in the X-, Y- and Z-axes directions of the birefringent layer, respectively. The X-axis direction is the axial direction in which the refraction index shows a maximum value in the in-plane direction of the birefringent layer, the Y-axis direction is the axial direction perpendicular to the X-axis direction in the plane, and the Z-axis direction is the thickness direction perpendicular to the X- and Y-axes directions.
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Chinese Office Action for Application No. 03818329 dated Jun. 15, 2007.
Hayashi Masaki
Murakami Nao
Nishikouji Yuuichi
Yoshimi Hiroyuki
Nitto Denko Corporation
Qi Mike
Westerman, Hattori, Daniels & Adrian , LLP.
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