Title:
光学フィルム、及び画像表示装置
Document Type and Number:
Japanese Patent JP4995618
Kind Code:
B2
Abstract:
The present invention provides an optical film exhibiting wavelength dispersion such that a retardation value is smaller on the shorter wavelength side, and capable of being also formed comparatively thinly. The optical film of the present invention is an optical film including a polyimide-based polymer represented by the following general formula (I). In the formula (I), m is 40% by mol or more and 100% by mol or less. R1 and R2 each independently denote a substituent having a carbon-carbon double bond or a triple bond. A, A′, B, B′, E, G, and H each denote a substituent, and small letters corresponding to these alphabets denote substitution number thereof. X and Y each independently denote bond part such as a covalent bond. The substituents having a carbon-carbon double bond or a triple bond represented by R1 and R2 are a substituted or unsubstituted aryl group, a substituted or unsubstituted vinyl group, and a substituted or unsubstituted ethynyl group.
Inventors:
Toshiyuki Iida
Hiroshi Omori
Kuroki Miyuki
Hiroshi Omori
Kuroki Miyuki
Application Number:
JP2007107991A
Publication Date:
August 08, 2012
Filing Date:
April 17, 2007
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
G02B5/30; C08G73/10; C08J5/18; G02F1/13363
Domestic Patent References:
| JP2006003715A | ||||
| JP2005097230A | ||||
| JP2005015442A | ||||
| JP2000511296A | ||||
| JP2008112124A |
Attorney, Agent or Firm:
Minoru Ohnaka
Nobuo Ouchi
Suzuki Katsuto
Nobuo Ouchi
Suzuki Katsuto