Optical compensation film, viewing angle compensation...

Details Optical compensation film, viewing angle compensation... Optical compensation film, viewing angle compensation...

2006-09-12

2006-09-12

Pyon, Harold (Department: 1772)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C428S001100, C428S001300, C428S001330, C349S096000, C349S117000, C349S118000

Reexamination Certificate

active

07105213

ABSTRACT:
An optical compensation film comprising a cellulose ester film is disclosed. In the film, (a) each of photoelastic coefficient C(md) in a mechanical direction and photoelastic coefficient C(td) in the transverse direction of the cellulose ester film is 1×10−9to 1×10−13Pa−1and C(md)<C(td), (b) retardation R0within the plane of the cellulose film defined by Formula (I) is 20 to 70 nm, (c) retardation Rtof the cellulose ester film in a thickness direction, defined by Formula (II) is 70 to 400 nm, and (d) both of a dimensional variation ratio S(md) in the mechanical direction and a dimensional variation ratio S(td) in the transverse direction of the cellulose ester film prior to and after being allowed to stand at ambient conditions of 80° C. and 90 percent relative humidity for 50 hours are −1 to 1 percent, |S(md)|>|S(td)|, and C(td)×|S(td)|<C(md)×|S(md)|.

REFERENCES:
patent: 5863457 (1999-01-01), Hasebe et al.
patent: 6417904 (2002-07-01), Yamaoka et al.
patent: 6476892 (2002-11-01), Aminaka
patent: 6479892 (2002-11-01), Hopson et al.
patent: 6559912 (2003-05-01), Aminaka
patent: 6630973 (2003-10-01), Matsuoka et al.
patent: 6881457 (2005-04-01), Tasaka et al.

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