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. 26, 2006
Filed:
Oct. 06, 2003
Hidetoshi Nakata, Ageo, JP;
Kiyofumi Takeuchi, Tokyo, JP;
Hidetoshi Nakata, Ageo, JP;
Kiyofumi Takeuchi, Tokyo, JP;
Dainippon Ink and Chemicals, Inc., Tokyo, JP;
Abstract
A chiral nematic liquid crystal composition has minimal temperature dependency of the natural pitch and temperature dependency of the wavelength selective reflection and low temperature storage stability thereof is excellent. A chiral nematic liquid crystal composition with a broad liquid crystal temperature range is used in a bistable liquid crystal display element, and a bistable liquid crystal display element comprising the liquid crystal composition. The chiral nematic liquid crystal composition comprises optically active compounds represented by general formula (I-a) and general formula (II-a): RP-LP-L-P—R  (II-a) wherein the general formula (II-a) has the same helical twisting direction as the general formula (I-a), and shows a positive temperature dependency for the natural pitch, and a HTP value of at least 3. A bistable liquid crystal display element comprises the liquid crystal composition.