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. 19, 2006
Filed:
Jun. 24, 2003
Hidetoshi Nakata, Ageo, JP;
Makoto Sasaki, Saitama, JP;
Kiyofumi Takeuchi, Tokyo, JP;
Haruyoshi Takatsu, Tokyo, JP;
Hidetoshi Nakata, Ageo, JP;
Makoto Sasaki, Saitama, JP;
Kiyofumi Takeuchi, Tokyo, JP;
Haruyoshi Takatsu, Tokyo, JP;
Dainippon Ink and Chemicals, Inc., Tokyo, JP;
Abstract
A method of increasing helical twisting power (HTP) in an optically active compound used in a liquid crystal material is provided. An optically active compound which exhibits a large HTP value is also provided. Furthermore, a liquid crystal composition which exhibits a high upper temperature limit of the liquid crystal after the addition of the optically active compound, and a liquid crystal display device using the same are provided. In a method, an HTP of a compound having a partial structure represented by formula (A), which has an asymmetric carbon atom, is increased by replacing the partial structure represented by formula (A) by a partial structure represented by formula (B) (wherein * represents the position of an asymmetric carbon atom, Yrepresents a substituent such as an alkyl group and a halogen). A compound is represented by formula (I):