Optical film and image display

Details Optical film and image display Optical film and image display

2004-09-13

2008-12-16

Caley, Michael H (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S117000, C349S119000

Reexamination Certificate

active

07466382

ABSTRACT:
An optical film(3) of the invention comprises a polarizing plate(1) and plural retardation films(2) so that an absorption axis of the polarizing plate(1) is perpendicular or parallel to slow axes of the plural retardation films(2) and the slow axes of the plural retardation films(2) are parallel to one another. An Nz value expressed by Nz=(nx1−nz1)/(nx1−ny1) is in the range of from 0.15 to 0.85 and an in-plane retardation Re1expressed by Re1=(nx1−ny1)×d1is in the range of from 200 to 350 nm, where in each of the plural retardation films, a direction along with the refractive index in the film plane is maximum is defined as the X-axis, a direction perpendicular to the X-axis as the Y-axis, the thickness direction of the film as the Z-axis, and where refractive indices in each axial direction are defined as nx1, ny1, and nz1, respectively, and the thickness of the film as d1(nm). The optical film may realize an easily viewable display with high contrast ratio in a wide range.

REFERENCES:
patent: 6771340 (2004-08-01), Yoshimi et al.
patent: 6927821 (2005-08-01), Yano et al.
patent: 6967637 (2005-11-01), Aoyama et al.
patent: 1374549 (2002-10-01), None
patent: 1403855 (2003-03-01), None
patent: 4-305602 (1992-10-01), None
patent: 4-371903 (1992-12-01), None
patent: 2000-284124 (2000-10-01), None
patent: 2001-350022 (2001-12-01), None
patent: 2001350022 (2001-12-01), None
patent: 2002-338703 (2002-11-01), None
patent: 2002328224 (2002-11-01), None
patent: 2003-240957 (2003-08-01), None
patent: 2001-0021212 (2001-03-01), None
International Search Report of PCT/JP2004/013324, dated Dec. 10, 2004.
International Preliminary Report on Patentability of Corresponding International Application No. PCT/JP2004/013324 mailed Apr. 6, 2006.
Office Action of Corresponding Korean Patent Application No. 10-2006-7003081 issued Dec. 15, 2006.
Office Action of Corresponding Chinese Patent Application No. 200480026915.4 issued Aug. 17, 2007.

Affiliated with

Also associated with

Rating

Optical film and image display 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 film and image display, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical film and image display will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4020861