Display apparatus with two polarization compensators

Details Display apparatus with two polarization compensators Display apparatus with two polarization compensators

2005-10-11

2005-10-11

Chowdhury, Tarifur R. (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S096000, C349S113000, C349S117000, C359S486010

Reexamination Certificate

active

06954245

ABSTRACT:
A projection display apparatus (10) uses a modulation optical system (200) that includes a liquid crystal device (210) in combination with a wire grid polarization beamsplitter (240), a wire grid polarization analyzer (270) and a projection lens (285) to form an image. In order to achieve high contrast and maintain high brightness levels, a compensator (260) is provided for minimizing leakage light for pixels in the black (OFF) state. A number of configurations are possible, such as with the compensator (260) disposed in the optical path between the liquid crystal device (210) and the wire grid polarization beamsplitter (240) and with a secondary compensator (265) disposed between wire grid polarization analyzer (270) and the wire grid polarization beamsplitter (240).

REFERENCES:
patent: 2403731 (1946-07-01), MacNeille
patent: 4441791 (1984-04-01), Hornbeck
patent: 4701028 (1987-10-01), Clerc et al.
patent: 5039185 (1991-08-01), Uchida et al.
patent: 5298199 (1994-03-01), Hirose et al.
patent: 5383053 (1995-01-01), Hegg et al.
patent: 5535047 (1996-07-01), Hornbeck
patent: 5576854 (1996-11-01), Schmidt et al.
patent: 5600383 (1997-02-01), Hornbeck
patent: 5619352 (1997-04-01), Koch et al.
patent: 5620755 (1997-04-01), Smith, Jr. et al.
patent: 5652667 (1997-07-01), Kurogane
patent: 5719695 (1998-02-01), Heimbuch
patent: 5748368 (1998-05-01), Tamada et al.
patent: 5767827 (1998-06-01), Kobayashi et al.
patent: 5798819 (1998-08-01), Hattori et al.
patent: 5808795 (1998-09-01), Shimomura et al.
patent: 5844722 (1998-12-01), Stephens et al.
patent: 5912762 (1999-06-01), Li et al.
patent: 5914818 (1999-06-01), Tejada et al.
patent: 5918961 (1999-07-01), Ueda
patent: 5930050 (1999-07-01), Dewald
patent: 5969861 (1999-10-01), Ueda et al.
patent: 5978056 (1999-11-01), Shintani et al.
patent: 6008951 (1999-12-01), Anderson
patent: 6010121 (2000-01-01), Lee
patent: 6062694 (2000-05-01), Oikawa et al.
patent: 6081312 (2000-06-01), Aminaka et al.
patent: 6089717 (2000-07-01), Iwai
patent: 6122103 (2000-09-01), Perkins et al.
patent: 6141075 (2000-10-01), Ohmuro et al.
patent: 6234634 (2001-05-01), Hansen et al.
patent: 6243199 (2001-06-01), Hansen et al.
patent: 6288840 (2001-09-01), Perkins et al.
patent: 6447120 (2002-09-01), Hansen et al.
patent: 6486997 (2002-11-01), Bruzzone et al.
patent: 6511183 (2003-01-01), Shimizu et al.
patent: 6585378 (2003-07-01), Kurtz et al.
patent: 6643077 (2003-11-01), Magarill et al.
patent: 6661475 (2003-12-01), Stahl et al.
patent: 6669343 (2003-12-01), Shahzad et al.
patent: 6714350 (2004-03-01), Silverstein et al.
patent: 2003/0081179 (2003-05-01), Pentico et al.
patent: 2003/0193652 (2003-10-01), Pentico et al.
J. Chen, K. H. Kim, J. J. Jyu, and J. H. Souk; Optimum Film Compensation Modes for TN and VA LCDs; SID 98 Digest, pp. 315-318.
P. Yeh; Generalized Model for Wire Grid Polarizers; SPIE vol. 307, 1981, pp. 13-21.
H. Kikuta, H. Yoshida, and K. Iwata; Ability and Limitation of Effective Medium Therory for Subwavelength Gratings; Optical Review, vol. 2, No. 2 (1995), pp. 92-99.
J. J. Kuta, H. M. van Driel, D. Landheer, and Y. Feng; Coupled-Wave Analysis of Lamellar Metal Transmission Gratings for the Visible and the Infrared; Optical Society of America, vol. 12, No. 5 (May 1995), pp. 1118-1127.
P. Lazarev and M. Paukshto; Low-Leakage Off-Angle in E-Polarizers; SID 2001 Digest, pp. 101-105.
T. Ishinabe, T. Miyashita, and T. Uchida; Novel Wide Viewing ANgle Polarizer with High Achromaticity; SID 00 Digest, pp. 1094-1097.

Affiliated with

Also associated with

Rating

Display apparatus with two polarization compensators does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Display apparatus with two polarization compensators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Display apparatus with two polarization compensators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3488713