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:
Jun. 21, 1977
Filed:
Dec. 22, 1975
Applicant:
Inventors:
Joseph Borel, Echirolles, FR;
Jacques Robert, St-Egreve, FR;
Assignee:
Commissariat a l'Energie Atomique, Paris, FR;
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
3403 / ; 250331 ; 3501 / ;
Abstract
In a liquid crystal whose molecules have temperature-dependent dielectric anisotropy within a range such that the liquid crystal retains the same phase, the optical properties of a liquid crystal film are controlled by applying an electric field of predetermined frequency to the film and by bringing the temperature of the film to a value within the range mentioned. The dielectric anisotropy then assumes a predetermined value in respect of said frequency and the liquid crystal film assumes a predetermined optical state.