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35results about How to "Suppresses color shift" patented technology

Polarizing plate having optical compensation layer, liquid crystal panel using the polarizing plate having optical compensation layer, liquid crystal display device, and image display device

InactiveCN101288008AAvoid light leakageExcellent field of view characteristicsPolarising elementsNon-linear opticsIn planePhase difference
The present invention provides a thin polarizing plate having an optical compensation layer capable of improving visual angle characteristics, realizing a high contrast, preventing interference irregularities and thermal irregularities, suppressing a color shift, exhibiting a preferable color reproducibility, and effectively preventing light leak in the black display. It is also possible to provide a liquid crystal panel and an image display device using such a polarizing plate having an optical compensation layer. The polarizing plate having the optical compensation layer includes a polarizer, a first optical compensation layer, and a second optical compensation layer in this order. The first optical compensation layer has a refractivity distribution of nx > ny = nz and exhibits wavelength distribution characteristics in which the in-plane phase difference Re1 becomes smaller as the wavelength becomes shorter and the in-plane phase difference Re1 is 90 to 160 nm. The second optical compensation layer is a film layer having a refractivity distribution of nx = ny > nz, an in-plane phase difference Re2 0 to 20 nm, and a phase difference in the thickness direction Rth2 30 to 300 nm.
Owner:NITTO DENKO CORP

Polarizing plate with optical compensation layer, liquid crystal panel using polarizing plate with optical compensation layer, liquid crystal display unit, and image display unit

A polarizing plate with an optical compensation layer capable of contributing to its thinning, realizing high contrast with viewing angle characteristics improved, preventing interference non-uniformity and thermal non-uniformity, being limited in color shift, delivering a good color reproducing feature, and favorably preventing light leakage at black displaying; and a liquid crystal panel, a liquid crystal display unit and an image display unit using such a polarizing plate with an optical compensation layer. The polarizing plate with an optical compensation layer comprises a polarizer, a first optical compensation layer, an adhesive layer, and a second optical compensation layer sequentially in the order mentioned, wherein the first optical compensation layer has a refractive index distribution, nx>ny=nz, with its in-plane phase difference Re1 exhibiting wavelength dispersion characteristics that gradually decrease toward a short-wavelength side and with its in-plane phase difference Re1 being 90-160 nm, and the second optical compensation layer is a coating layer, has a refractive index distribution, nx=ny>nz, with its in-phase difference Re2 being 0-20 nm, its phase difference Rth2 in thickness direction being 30-300 nm and its thickness being 0.5-10 [mu]m.
Owner:NITTO DENKO CORP

Liquid crystal display device

The invention provides a liquid crystal display device which can restrain color offset of a normally white displayed vertical oriented liquid crystal display device in observation in a left-and-right direction. The liquid crystal display device is provided with a first substrate, a second substrate, a liquid crystal layer, a first polarizing plate, a second polarizing plate, a first optical board, a second optical board and a third optical board. The absorption axes of the polarizing plates are configured approximately perpendicular with one another. Furthermore each polarizing plate is configured at an angle of approximate 45 DEG relative to the orienting direction of an approximately central part in the layer thickness direction of the liquid crystal layer when an electric field is applied. The first optical board is a 1/4 wavelength board, and the in-surface slow axis is configured at an angle of approximate 45 DEG relative to the absorption axis of the first polarizing plate. The second optical board is a 1/4 wavelength board, and the in-surface slow axis is configured at an angle of approximate 45 DEG relative to the absorption axis of the second polarizing plate. The third optical board has negative biaxial optical anisotropy, and the in-surface slow axis is configured to be approximately perpendicular with the absorption axis of the first polarizing plate.
Owner:STANLEY ELECTRIC CO LTD
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