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:
Apr. 26, 2005
Filed:
May. 09, 2002
Ryuma Kuroda, Ichihara, JP;
Hiroaki Takahata, Ichihara, JP;
Nobuo Oi, Narashino, JP;
Kaori Tsubouchi, Ibaraki, JP;
Kyoko Hino, Sodegaura, JP;
Ryuma Kuroda, Ichihara, JP;
Hiroaki Takahata, Ichihara, JP;
Nobuo Oi, Narashino, JP;
Kaori Tsubouchi, Ibaraki, JP;
Kyoko Hino, Sodegaura, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
An optical member comprising a polymer which is amorphous and has a glass transition temperature of not lower than 110° C. and optical property parameters O'(∞)) and O′(∞) that satisfy the following inequality (1),|(∞)|<−(∞)|+  (1),is superior in its heat resistance and transparency and high in its stability of optical properties. Therefore, the optical member can be used as, for example, a constituent of optical systems in a liquid crystal display, thereby suppressing change in a display color tone depending on variation of using circumstances of the liquid crystal display.