Liquid crystal display device with triacetyl cellulose film at an observer side of front polarization plate
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United States of America Patent
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Jun 11, 2013
Grant Date -
Feb 3, 2011
app pub date -
Feb 3, 2009
filing date -
May 14, 2008
priority date (Note) -
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Abstract
A liquid crystal display device includes a liquid crystal panel (2) disposed between two linear polarization plates (1, 3) and a triacetyl cellulose film having biaxial optical anisotropy (4), the triacetyl cellulose film having biaxial optical anisotropy (4) (i) being disposed further from the screen front side than a front polarization plate, which is one of the two linear polarization plates (1, 3), and (ii) having a planar retardation comprised in a range from 40 nm to 100 nm. Accordingly, it is possible to provide a liquid crystal display device allowing an observer to perceive, through polarized sunglasses and with a high display quality, an image on a screen not only from a frontal viewpoint but also if an azimuth angle and a polar angle at which viewpoints are set are shifted from the frontal viewpoint.
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