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. 24, 1995
Filed:
Apr. 19, 1991
Applicant:
Inventors:
Hans-Rolf Dubal, Konigstein/Taunus, DE;
Takamasa Harada, Inzai, JP;
Heinz Rieger, Hofheim am Taunus, DE;
Norbert Rosch, Frankfurt am Main, DE;
Peter Wegener, Konigstein/Taunus, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
428-1 ; 25229901 ; 2522996 ; 359 75 ; 359 79 ; 359100 ; 428323 ; 428409 ; 4284111 ; 4284735 ; 4284744 ; 428480 ;
Abstract
Ferroelectric liquid-crystal display of high contrast and brightness. The use of alignment layers containing compounds having an amphiphilicity-providing effect increases the contrast and brightness of the image in FLC displays.