Liquid crystal projection system

Details Liquid crystal projection system Liquid crystal projection system

2007-06-26

2007-06-26

Perkey, W. B. (Department: 2851)

Optics: image projectors

Polarizer or interference filter

C353S029000, C353S122000, C359S454000

Reexamination Certificate

active

10884843

ABSTRACT:
A projection system is provided. The projection system comprises a projector for producing a polarized light for projecting an image and a projection screen on which the image projected by the projector is visualized. The polarization plane of the polarized light and the polarization plane of the polarizing means are parallel. The polarizing means comprises a film formed by rodlike supramolecules including at least one polycyclic organic compound with conjugated π-systems, whereby the 40% viewing angle transmittance iso-line of the polarizing means of the screen has an aspect ratio of not less than 2.

REFERENCES:
patent: 2793361 (1957-05-01), White
patent: 3319519 (1967-05-01), Shelanski
patent: 5251065 (1993-10-01), Uetsuki
patent: 5335022 (1994-08-01), Braun et al.
patent: 5444570 (1995-08-01), Uetsuki et al.
patent: 5760954 (1998-06-01), Tatsuki et al.
patent: 6239907 (2001-05-01), Allen et al.
patent: 6282023 (2001-08-01), Bergman
patent: 6381068 (2002-04-01), Harada et al.
patent: 6400505 (2002-06-01), Funazaki et al.
patent: 6449089 (2002-09-01), Moshrefzadeh et al.
patent: 6462870 (2002-10-01), Funazaki et al.
patent: 2002/0012165 (2002-01-01), Funazaki et al.
patent: 2003/0117704 (2003-06-01), Lippey et al.
patent: 2003/0154909 (2003-08-01), Lazarev et al.
patent: 2003/0223113 (2003-12-01), Starkweather
patent: 2003/0227597 (2003-12-01), Silverstein et al.
patent: 2004/0067324 (2004-04-01), Lazarev et al.
patent: 2004/0080825 (2004-04-01), Harita et al.
patent: 0 295 913 (1988-12-01), None
patent: 0 905 556 (1999-03-01), None
patent: 1 128 192 (2001-08-01), None
patent: 3089316 (1991-04-01), None
patent: 2 137 801 (1999-09-01), None
patent: WO 99/53376 (1999-10-01), None
patent: WO 01/63346 (2001-08-01), None
patent: WO 03/007025 (2003-01-01), None
Bobrov, Y., et al., “Thin Film Polarizers For Liquid Crystal Displays”, Proceedings of SPIE, vol. 4511, SPIE 0277-786X/01, 2001, pp. 133-140.
Ebina, Kazuyoshi, “51.3: Optical System Architectures for Rear Projection Screen”, SID 02 Digest, 2002, pp. 1342-1345.
Lazarev, P., et al., “Thin Crystal Film Retarders”, Proceedings of the 7thInternational Workshop “Displays, Materials and Components”, Kobe, Japan, Nov. 29-Dec. 1, 2000, pp. 1159-1160.
Nagata, Yoshihide, et al., “20.3: An Advanced Projection Screen with a Wide Vertical View Angle”, SID 04 Digest, 2004, pp. 846-849.
Shimizu, Yuichiro, et al., “22.4: A Fine-pitch Screen for Rear Projection TV”, SID 03 Digest, 2003, pp. 886-889.
Umeya, Masanori, et al., “20.2: New Front-Projection Screen Comprised of Cholesteric-LC Films”, SID 04 Digest, 2004, pp. 842-845.
Cobb, C., et al., “LCD With 7-Micron Light Management Path”, Liquid Crystal Materials, Devices, and Applications VIII, Proceedings of SPIE, 2002 SPIE, vol. 4658, pp. 34-39. XP-002302040.
Paukshto, Michael, et al., “Two Novel Applications of Thin-Film E-Type Polarizers”, SID 02 Digest, 2002, pp. 722-725 XP-002302039.
Yeh, P., et al., “Molecular Crystalline Thin Film E-Polarizer”, Molecular Materials, 2001, vol. 14, pp. 1-19 XP-002302038.

Affiliated with

Also associated with

Rating

Liquid crystal projection system 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 projection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal projection system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3808995