Display panel with compensation by holographic birefringent films
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United States of America Patent
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-
Dec 5, 2000
Grant Date -
N/A
app pub date -
Apr 14, 1999
filing date -
Oct 15, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A display panel having compensation using holographic birefringent films. Due to the natural birefringence of liquid crystals, contrast suffers when a liquid crystal cell is viewed at an oblique incident angle. Compensation devices made of birefringent media are used to correct this deficiency. The compensation devices include at least one film, the birefringence of which is induced by the recording of a volume hologram consisting of parallel fringes. The choice of the optical birefringent axes depends only on the orientation of the fringes so that it is easy to achieve compensation using uniaxial films which are inclined with respect to the plane of the film.
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