Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2003-03-03
2008-07-22
Nelms, David C. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S117000, C349S118000, C349S120000, C349S130000
Reexamination Certificate
active
07403248
ABSTRACT:
The liquid crystal display device of the invention includes: a liquid crystal layer taking on a roughly vertically aligned state in the black display state: first and second polarizing plates placed to face each other so that the transmission axes are orthogonal to each other; at least one first phase plate placed between the liquid crystal layer and the first polarizing plate and/or the second polarizing plate; at least one second phase plate placed between the first phase plate and the first or second polarizing plate whichever is farther from the first phase plate; and an illuminator for illuminating the liquid crystal layer with light via the first or second polarizing plate. The first phase plate has biaxial optical anisotropy and has functions of compensating part of thickness-direction retardation of the liquid crystal layer in the black display state and suppressing light leakage caused by deviation of the transmission axes of the first and second polarizing plates from the mutual orthogonal relationship in a tilted viewing angle direction. The second phase plate has negative uniaxial optical anisotropy and has a function of compensating the thickness-direction retardation of the liquid crystal layer in the black display state in cooperation with the first phase plate.
REFERENCES:
patent: 5107356 (1992-04-01), Castleberry
patent: 5550661 (1996-08-01), Clark et al.
patent: 6281956 (2001-08-01), Ohmuro et al.
patent: 6292242 (2001-09-01), VanderPloeg et al.
patent: 6307608 (2001-10-01), Sakamoto
patent: 6339460 (2002-01-01), Saitoh
patent: 6417892 (2002-07-01), Sharp et al.
patent: 6512561 (2003-01-01), Terashita et al.
patent: 6628359 (2003-09-01), Terashita et al.
patent: 6630975 (2003-10-01), Terashita
patent: 6642981 (2003-11-01), Ohmura et al.
patent: 2001/0030726 (2001-10-01), Yoshida et al.
patent: 2001/0048497 (2001-12-01), Miyachi et al.
patent: 2002/0047968 (2002-04-01), Yoshida et al.
patent: 2006/0028601 (2006-02-01), Kawahara et al.
patent: 2000-284290 (2000-10-01), None
J. Chen et al., Optimum Film Compensation Modes for TN and VA LCDs, SID Digest 1998, pp. 315-318.
Korean Office Action mailed Mar. 14, 2005 (w/English translation thereof).
Kubo Masumi
Miyachi Koichi
Nakai Nobuhiko
Ohkura Hidehiko
Uchida Toshihisa
Lawson Matthew P
Nelms David C.
Nixon & Vanderhye P.C.
Sharp Kabushiki Kaisha
LandOfFree
Liquid crystal display device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid crystal display device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3969154