Liquid crystal cells – elements and systems – Liquid crystal system – Projector including liquid crystal cell
Reexamination Certificate
2007-10-23
2011-11-01
Robinson, Mark (Department: 2883)
Liquid crystal cells, elements and systems
Liquid crystal system
Projector including liquid crystal cell
C349S018000, C349S120000
Reexamination Certificate
active
08049823
ABSTRACT:
The disclosure is directed to projectors, optical compensation methods and liquid crystal devices. In one example, a liquid crystal panel has a liquid crystal layer pinched between a pair of substrates. A pair of polarizing plates is disposed with the liquid crystal panel in between the polarizing plates. A first phase difference plate is disposed between the pair of polarizing plates for compensating for a phase difference of the liquid crystal panel. A second phase difference plate is disposed between the pair of polarizing plates for compensating for a phase difference of the pair of polarizing plates. In certain embodiments, the first phase difference plate may have an optically anisotropic layer having a negative refractive index anisotropy and an optical axis oriented in a thickness direction of the first phase difference plate. This abstract is intended only to aid those searching patents, and is not intended to be used to interpret or limit the scope or meaning of the claims in any manner.
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K. Ohmuro, et al., Development of Super-High-Image-Quality Vertical-Alignment-Mode LCD, SID 97 Digest, 1997, pp. 845-848.
AdvantEdge Law Group, LLC
Inadomi Michael
Robinson Mark
Seiko Epson Corporation
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