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:
Jul. 31, 1984
Filed:
Sep. 10, 1982
Applicant:
Inventor:
Edward P Raynes, Malvern, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ;
U.S. Cl.
CPC ...
25229963 ; 2522995 ; 25229965 ; 25229966 ; 25229967 ;
Abstract
A liquid crystal for use in liquid display devices comprises at least one material from group 1 comprising: ##STR1## at least one of the group 1 materials having n=2, or 4; and at least one material from group 2 comprising: ##STR2## together with an ester liquid crystal material. The ester forms between 10% and 90% (preferably between 30% and 70%) by weight of the total mixture and the group 2 material forms between 5% and 30% by weight of the total mixture. Examples of the esters have the general formula ##STR3## where R.sub.1, R.sub.2 represent alkyl or alkoxy groups, and ##STR4## where R.sub.3, R.sub.4 represent alkyl groups. All alkyl and alkoxy end groups are unbranched.