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:
Aug. 13, 2024
Filed:
Jan. 28, 2020
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Jiyeon Sung, Daejeon, KR;
Hoyong Lee, Daejeon, KR;
Cheol Jun Song, Daejeon, KR;
Kyunghwan Kim, Daejeon, KR;
Mi Eun Kang, Daejeon, KR;
Assignee:
LG CHEM, LTD., Seoul, KR;
Primary Examiner:
Int. Cl.
CPC ...
C08G 73/10 (2006.01); C08G 73/14 (2006.01); C08J 5/18 (2006.01); C08L 79/08 (2006.01); G02B 1/04 (2006.01); G02F 1/1333 (2006.01);
U.S. Cl.
CPC ...
C08G 73/1067 (2013.01); C08G 73/1007 (2013.01); C08G 73/1039 (2013.01); C08G 73/1042 (2013.01); C08G 73/1078 (2013.01); C08G 73/1082 (2013.01); C08G 73/14 (2013.01); C08J 5/18 (2013.01); C08L 79/08 (2013.01); G02B 1/04 (2013.01); G02F 1/133305 (2013.01); C08J 2379/08 (2013.01); C08L 2201/08 (2013.01); C08L 2203/16 (2013.01); C08L 2203/20 (2013.01); C09K 2323/00 (2020.08); C09K 2323/027 (2020.08); G02F 2202/022 (2013.01);
Abstract
The present disclosure provides a polyimide film having improved heat resistance and refractive index by using a polyimide precursor composition comprising a diamine of Chemical Formula 1 and an acid dianhydride of Chemical Formula 2 as polymerization components, thereby reducing the difference in refractive index from the upper layer to improve bottom emission efficiency.