Liquid crystal cells – elements and systems – Particular structure – Interconnection of plural cells in series
Reexamination Certificate
2008-04-09
2011-12-06
Vu, Phu (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Interconnection of plural cells in series
Reexamination Certificate
active
08072561
ABSTRACT:
Contrast compensation for a liquid crystal display projection system including a light source, a first polarizer, a liquid crystal display panel, and a second polarizer is provided using a tilted compensating plate. The compensating plate includes a first birefringent element having an optic axis oriented at a first angle to the plate normal, where the first angle is greater than zero degrees (e.g., an A-plate or O-plate), and a second birefringent element having an optic axis oriented at a second angle to the plate normal, where the second angle is substantially equal to zero degrees (e.g., a C-plate). The compensating plate is tilted relative to a plane of the liquid crystal display panel. The tilted compensating plate has been shown to provide improved contrast compensation for twisted nematic liquid crystal displays.
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Hendrix Karen Denise
Tan Kim Leong
JDS Uniphase Corporation
Pequignot Matthew A.
Pequignot & Myers LLC
Vu Phu
LandOfFree
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