Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2008-07-08
2008-07-08
Nelms, David C. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S117000
Reexamination Certificate
active
11136367
ABSTRACT:
A first phase plate and a third phase plate, which constitute a polarizer structure, cooperate to impart a phase difference of a ¼ wavelength to linearly polarized light that emerges from a first polarizer plate. A second phase plate and a fourth phase plate cooperate to impart a phase difference of a ¼ wavelength to linearly polarized light that emerges from a second polarizer plate. Slow axes in planes of the first phase plate and the second phase plate are substantially parallel. A crossed-axes angle between slow axes in planes of the first phase plate and the third phase plate is 60°, a crossed-axes angle between slow axes in planes of the second phase plate and the fourth phase plate is 60°, and a crossed-axes angle between slow axes in planes of the third phase plate and fourth phase plate is 60°.
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T. Ishinabe, et al., “A Wide Viewing Angle Polarizer and a Quarter-Wave Plate with a Wide Wavelength Range for Extremely High Quality LCD's”, IDW '01, (2001), pp. 485-488.
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Hisatake Yuzo
Murayama Akio
Tago Chigusa
Chung David Y
Nelms David C.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Toshiba Matsushita Display Technology Co., Ltd.
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