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:
Feb. 05, 2013
Filed:
Apr. 02, 2008
Bertrand Caillaud, Brest, FR;
Pascal Gautier, Brest, FR;
Jean-louis DE Bougrenet DE LA Tocnaye, Guilers, FR;
Laurent Dupont, Plouzane, FR;
Aline Guenot, Brest, FR;
Bertrand Caillaud, Brest, FR;
Pascal Gautier, Brest, FR;
Jean-Louis De Bougrenet De La Tocnaye, Guilers, FR;
Laurent Dupont, Plouzane, FR;
Aline Guenot, Brest, FR;
Institut Telecom/Telecom Bretagne, Brest Cedex, FR;
Lixys, Plouzane, FR;
Abstract
A method is provided for manufacturing an electrooptic cell, which includes two plates of optically transparent material and at least one thickness of a composite gel based on a smectic liquid crystal and on a polymer provided between the plates, wherein the gel is in a smectic phase at ambient temperature. The method includes injecting a mixture of a ferroelectric and/or anti-ferroelectric smectic liquid and a monomer between the plates, wherein the monomer content of the mixture is between 5 and 25% by weight. The mixture is heated to above its smectic phase/nematic phase transmission temperature so that the mixture is in the nematic phase. The mixture is irradiated, by ultraviolet radiation, so as to polymerize the monomer and thus obtain the gel. During the irradiation step, an electric or magnetic field is applied to the mixture.