Abstract: The present invention relates to a retardation film having a zero wavelength dispersibility and a uniform retardation, and an optical laminated film having a positive wavelength dispersibility. Here, in the retardation film, a homo polypropylene resin has an isotactic index more than 85 percent and having, and a value subtracting an average in-plane retardation value of the retardation film from the in-plane retardation value at the retardation film is in a range of ±5 nm. In the optical laminated film, another retardation film having a negative wavelength dispersibility is laminated on the above retardation film having a zero wavelength dispersibility.
Type:
Grant
Filed:
June 12, 2009
Date of Patent:
October 2, 2012
Assignee:
Hwaseung Industries Co. Ltd
Inventors:
Ho Young Lee, Ju Han Kim, Young Joong Kim, Byung Woo Kim, Ki Sung Ju
Abstract: The present invention relates to a retardation film having a zero wavelength dispersibility and a uniform retardation, and an optical laminated film having a positive wavelength dispersibility. Here, in the retardation film, a homo polypropylene resin has an isotactic index more than 85 percents and having, and a value subtracting an average in-plain retardation value of the retardation film from the in-plain retardation value at the retardation film is in a range of ±5 nm. In the optical laminated film, another retardation film having a negative wavelength dispersibility is laminated on the above retardation film having a zero wavelength dispersibility.
Type:
Application
Filed:
June 12, 2009
Publication date:
December 17, 2009
Applicant:
HWASEUNG Industries Co. Ltd
Inventors:
Ho Young Lee, Ju Han Kim, Young Joong Kim, Byung Woo Kim, Ki Sung Ju