ELLIPTIC POLARIZATION PLATE AND LIQUID CRYSTAL DISPLAY DEVICE

WIPO Patent Application WO/2009/028428

A1

Provided is an elliptic polarization plate having excellent view angle improving effects. In the elliptic polarization plate, a polarization plate, a first optical anisotropic layer and a second optical anisotropic layer are laminated in this order. The first optical anisotropic layer satisfies inequalities of 0.8≤NZ1≤1.6 and 120≤Re1≤250. The layers are laminated so that the slow axis of the first optical anisotropic layer and the absorption axis of the polarization plate orthogonally intersect with each other. The phase difference of the second optical anisotropic layer within a surface with a wavelength of 550nm is 30-150nm. The second optical anisotropic layer is a liquid crystal film composed of a liquid crystalline polymer exhibiting optically positive uniaxial characteristic and has a fixed nematic hybrid orientation structure having a liquid crystal molecule average tilt angle of 5-50°. The orientation direction of the second optical anisotropic layer and the absorption axis of the polarization plate are laminated in parallel, and the elliptic polarization plate is used in a TN type liquid crystal display device by having the second optical anisotropic layer side on the liquid crystal cell side.

TAKAHASHI YUJI (JP)
IKEDA SATORU (JP)
UESAKA TETSUYA (JP)

PCT/JP2008/065058

March 05, 2009

August 18, 2008

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NIPPON OIL CORP (JP)
TAKAHASHI YUJI (JP)
IKEDA SATORU (JP)
UESAKA TETSUYA (JP)

G02B5/30; G02F1/1335; G02F1/13363

JP2005189633A	2005-07-14
JP2005062668A	2005-03-10
JP2005004096A	2005-01-06
JP2005202101A	2005-07-28

MORITA, Nobuyuki (5-8 Nishi-shimbashi 3-chom, Minato-ku Tokyo, JP)

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