| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transparent film for improving the warpage characteristics of a liquid crystal display by having retardation that is small in a face and the film thickness direction, lessening the irregularities in the optical characteristics and variations due to environmental changes, such as the temperature and humidity, improving the viewing angle characteristics of the liquid crystal display, further lessening the absolute value of curl, and lessening the variations in curl due to environmental changes, such as the temperature and humidity. <P>SOLUTION: The transparent film has semi-IPN (semi-mutual penetration netting structure) polymer alloy of cellulose ester and crosslinking polymer, and a retardation value of the film thickness direction äwhere Rth<SB>(630)</SB>: Rth<SB>(λ)</SB>is the retardation value (units of nm) of the film thickness direction in wavelength λnm under 25°C60%RH} is in the range of -25 to +25. <P>COPYRIGHT: (C)2007,JPO&INPIT |
