Liquid crystal cells – elements and systems – Liquid crystal optical element – Passive liquid crystal polarizer
Reexamination Certificate
2004-04-15
2008-11-04
Kianni, K. Cyrus (Department: 2883)
Liquid crystal cells, elements and systems
Liquid crystal optical element
Passive liquid crystal polarizer
C349S196000
Reexamination Certificate
active
07446848
ABSTRACT:
An optical element of the invention comprises at least two laminated circular-polarization-type-reflection polarizers (a) whose wavelength bands for selective reflection of polarized light overlap one another, whereinthe at least two circular-polarization-type-reflection polarizers (a) each have a side capable of selectively reflecting a relatively short wavelength in the wavelength bands for selective reflection, andthe sides of said at least two circular-polarization-type-reflection polarizers (a) capable of selectively reflecting the relatively short wavelength are arranged opposite to each other. The optical element condenses or collimates incident light from a light source and can control transmission of light at large incident angles relative to the normal direction, increase front brightness and reduce coloration.
REFERENCES:
patent: 7075598 (2006-07-01), Umeya
patent: 7148513 (2006-12-01), He et al.
patent: 7256847 (2007-08-01), Kashima
patent: 7317498 (2008-01-01), Hara et al.
patent: 2002/0113921 (2002-08-01), Jiang et al.
patent: 2003/0076466 (2003-04-01), Ozawa et al.
patent: 2003/0174276 (2003-09-01), Umeya
patent: 2004/0145690 (2004-07-01), Kim et al.
patent: 2004/0223102 (2004-11-01), Kwon et al.
patent: 2005/0151896 (2005-07-01), Hara et al.
patent: 2005/0180017 (2005-08-01), Hara et al.
patent: 2005/0249890 (2005-11-01), Murakami et al.
patent: 2007/0014127 (2007-01-01), Hara et al.
patent: 2561483 (1996-09-01), None
patent: 8-271731 (1996-10-01), None
patent: 10-54909 (1998-02-01), None
patent: 10-321025 (1998-12-01), None
patent: 2000-56115 (2000-02-01), None
patent: 2001-264535 (2001-09-01), None
International Preliminary Report on Patentability of Corresponding International Application No. PCT/JP2004/005381 mailed May 4, 2006.
Office Action mailed Aug. 29, 2008 in Corresponding Japanese Patent Application No. 2003-179408.
Hara Kazutaka
Takahashi Naoki
Takeda Kentarou
Kianni K. Cyrus
Nitto Denko Corporation
Westerman, Hattori, Daniels & Adrian , L.L.P.
LandOfFree
Optical element, condensing backlight system and liquid... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical element, condensing backlight system and liquid..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical element, condensing backlight system and liquid... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4044057