Title:
OPTICAL RETARDATION FILM
Document Type and Number:
Japanese Patent JP2007334140
Kind Code:
A
Abstract:
To provide an optical retardation film which can be easily and inexpensively produced, is excellent in low photoelastic coefficient and low wavelength dispersibility, and can maintain high optical retardation even if it is heated.
The optical retardation film is obtained by drawing a raw roll film composed of a cyclic olefin resin and characterized in that the difference between the glass transition temperature measured by thermomechanical analysis, of the raw roll film and the heat shrinkage temperature measured by thermomechanical analysis, of the optical retardation film is not higher than 20°C.
COPYRIGHT: (C)2008,JPO&INPIT
More Like This:
| JP2001142072 | NORMALLY BLACK MODE TYPE TN LIQUID CRYSTAL DISPLAY DEVICE |
| JP2007206605 | LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY DEVICE |
| WO/1993/022397 | ELECTROOPTICAL LIQUID CRYSTAL SYSTEM |
Inventors:
HIGUCHI ISAO
NOZATO SEIJI
TAKAGI YOSHIHIRO
YAGI KAZUNARI
SAWADA TAKAHIKO
NOZATO SEIJI
TAKAGI YOSHIHIRO
YAGI KAZUNARI
SAWADA TAKAHIKO
Application Number:
JP2006167687A
Publication Date:
December 27, 2007
Filing Date:
June 16, 2006
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
G02B5/30; C08J5/18
Domestic Patent References:
| JPH0875921A | 1996-03-22 | |||
| JPH0630797A | 1994-02-08 |
Attorney, Agent or Firm:
Yasuo Yasutomi
Katsutoshi Moroda
Katsutoshi Moroda
Previous Patent: TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT AND IMAGE FORMING METHOD USING THE SAME
Next Patent: CULTURE OBSERVATION SYSTEM
Next Patent: CULTURE OBSERVATION SYSTEM