Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2006-03-28
2006-03-28
Shankar, Vijay (Department: 2673)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S058000
Reexamination Certificate
active
07019724
ABSTRACT:
The present invention, which relates to a polarization control liquid crystal optical switch for optical communication and its drive method, may be applied to the wavelength division multiplexing (WDM) communication method and an optical network using optical fibers. The liquid crystal optical switch comprises a liquid crystal polarizing rotator including at least one polarization control liquid crystal cell, wherein, at polarization rotation operation time, the liquid crystal polarizing rotator acts as a half-wave plate for linearly polarized light with a predetermined wavelength which enters the liquid crystal polarizing rotator. The polarization control liquid crystal cell has a function that varies a center wavelength to be used when the polarization control liquid crystal cell acts as the half-wave plate, and a function that maximizes a cross-talk attenuation.
REFERENCES:
patent: 5982539 (1999-11-01), Shirasaki
patent: 6097461 (2000-08-01), Sharp
patent: 6141071 (2000-10-01), Sharp
patent: 6356578 (2002-03-01), Yin
patent: 6594063 (2003-07-01), Bergner et al.
patent: 6600582 (2003-07-01), Liu et al.
patent: 6661483 (2003-12-01), Moriwaki et al.
patent: 6718082 (2004-04-01), Zhao et al.
patent: 6735017 (2004-05-01), Acosta et al.
Y. Hakamata et al., “A1.3 μm Single-Mode 2×2 Liquid Crystal Optical Switch” IEICE Trans. Commun., Oct. 1994, vol. E77-B, No. 10, pp. 1249-1255.
P. Yeh et al., “Optics of Liquid Crystal Displays” Wiley, 1999, pp. 107-110, pp. 213-222.
Citizen Watch Co. Ltd.
Patel Nitin
Shankar Vijay
Westerman Hattori Daniels & Adrian LLP
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