| 摘要 |
The present invention provides a cost-efficient, easy-processed producing method, instead of utilizing complicated steps of stretching and precisely controlling stretching ratio and direction in conventional technology, to obtain a PI optical compensation negative C plate of biphenyl ring structure without fluorine by means of coating, and an optical compensation film of PI film-comprising negative birefringent C plate useful as viewing angle compensation film for TFT-LCDs.
|
