Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-07-26
2005-07-26
Chowdhury, Tarifur R. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S096000
Reexamination Certificate
active
06922221
ABSTRACT:
A quarter-wave film having a wide bandwidth is invented. A preferred device configuration includes a chromatic half-wave film adjacent to a twisted nematic liquid crystal (TN-LC) film. When a linear polarizer is attached to the side of chromatic half-wave film and the angles of all the optical components are properly set, the combination of chromatic half-wave film and TN-LC film behaves as a broadband quarter-wave film. Based on this idea, a broadband circular polarizer is invented if the linear polarizer, the chromatic half-wave film and the TN-LC film are combined together. In addition, this idea can also be applied to reflective liquid crystal display devices, which include a linear polarizer, a chromatic half-wave film, a TN-LC cell and a reflector.
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Wu Shin-Tson
Zhu Xinyu
Chowdhury Tarifur R.
Law Offices of Brian S. Steinberger , P.A.
Morlin Joyce P.
Research Foundation of the University of Central Florida
Steinberger Brian S.
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