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:
Nov. 25, 2014
Filed:
Mar. 18, 2011
Nicolas Fraval, Brest, FR;
Jean Louis DE Bougrenet DE LA Tocnaye, Guilers, FR;
Frédéric Berier, Plouarzel, FR;
Nicolas Fraval, Brest, FR;
Jean Louis De Bougrenet De La Tocnaye, Guilers, FR;
Frédéric Berier, Plouarzel, FR;
Evosens, Plouzane, FR;
Abstract
An optical variation device includes a liquid-crystal element having optical properties that control the propagation of light and two substrate plates arranged on either side of the liquid-crystal element. The two substrate plates are covered respectively with first and second control electrodes. Each electrode has a substantially central opening referred to as the optical aperture. The device also has a layer of a material arranged between the electrodes and filling the optical aperture. The material has a surface resistivity of 10 kΩ/square to 10 GΩ/square and at least the first electrode is divided into a plurality of portions forming sub-electrodes suitable for simultaneously receiving different potentials.