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:
Jan. 06, 1998
Filed:
Jul. 19, 1995
Applicant:
Inventors:
Akira Takeuchi, Nishio, JP;
Norio Yamamoto, Kariya, JP;
Takayuki Fujikawa, Nishio, JP;
Toshio Yamamoto, Nishio, JP;
Assignee:
Nippon Soken, Inc., Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C09K / ; C09K / ;
U.S. Cl.
CPC ...
25229901 ; 25229963 ; 25229965 ; 25229966 ; 25229967 ; 25229961 ; 25229962 ;
Abstract
The antiferroelectric liquid crystal composition comprising at least one chiralsmectic liquid crystal compound having a positive specific rotatory power �.alpha.!.sub.D.sup.25 and at least one chiralsmectic liquid crystal compound having a negative specific rotatory power, and the value of the specific rotatory power of the composition is between -25.degree. and +25.degree. C. This invention provides a method for blending liquid crystal compounds to form an antiferroelectric liquid crystal composition which has a decreased dark luminance of a liquid crystal display element.