The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 18, 2012
Filed:
Sep. 30, 2008
Chih-kuang Chen, Taipei, TW;
Shih-ming Chen, Hsinchu, TW;
Kun-tsung LU, Bade, TW;
Jia-chih Huang, Jhubei, TW;
Li-ching Wang, Jhongli, TW;
Chih-Kuang Chen, Taipei, TW;
Shih-Ming Chen, Hsinchu, TW;
Kun-Tsung Lu, Bade, TW;
Jia-Chih Huang, Jhubei, TW;
Li-Ching Wang, Jhongli, TW;
Industrial Technology Research Institute, Hsinchu County, TW;
Abstract
The invention provides a method for forming optical compensating films, including: (a) providing a suspension containing clay; (b) adding a mono-functional acrylic oligomer of formula (I) in the suspension, wherein nis 2-25, Ris Calkyl or H and Ris H or CH; (c) adding a water-soluble polymer in the suspension; (d) adding a bi-functional acrylic oligomer of formula (II) in the suspension, wherein nis 3-50, and Rand Rindependently are H or CH; (e) after the step (d), drying the suspension to form a film; (f) exposing the film under UV light to cure the film; and (g) stretching the film, wherein the film has only a negative C-plate property before the stretching and has both negative C-plate and positive A-plate properties after the stretching.