Optical film containing polymer having naphtyl group

Details Optical film containing polymer having naphtyl group Optical film containing polymer having naphtyl group

2006-10-17

2010-10-05

Nakarani, D. S (Department: 1787)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C349S096000, C349S117000, C349S118000, C428S220000, C428S524000, C525S330300, C525S383000, C525S386000

Reexamination Certificate

active

07807239

ABSTRACT:
An optical film containing a polymer having at least a repeating unit represented by following general formula (I):The optical film is excellent in heat resistance, transparency and processability because it contains a polymer having a naphthyl group in a molecular structure. In addition, when a retardation film is produced by drawing the optical film, a composition ratio of the polymer can be adjusted in a specific range so that the retardation film exhibits inverse wavelength dispersion properties such that higher retardation value is offered in measuring by light with longer wavelength. The retardation film having such properties is extremely useful for improving display properties of a liquid crystal display device. The optical film is also used in the production of a polarizing plate.

REFERENCES:
patent: 2380032 (1945-07-01), Dorough et al.
patent: 6555617 (2003-04-01), Tanaka et al.
patent: 7501165 (2009-03-01), Ohmori et al.
patent: 2003/0130435 (2003-07-01), Tanaka et al.
patent: 0150293 (1985-08-01), None
patent: 2001-098027 (2001-04-01), None
International Search Report of PCT/JP2006/320630, date of mailing Jan. 16, 2007.
Chinese Office Action dated Jun. 19, 2009, issued in corresponding Chinese Patent Application No. 2006800414439.

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