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. 21, 2023
Filed:
Oct. 19, 2018
Essilor International, Charenton-le-Pont, FR;
Jerome Ballet, Charenton-le-Pont, FR;
Samuel Archambeau, Charenton-le-Pont, FR;
David Escaich, Charenton-le-Pont, FR;
Jean-Paul Cano, Charenton-le-Pont, FR;
Loic Quere, Charenton-le-Pont, FR;
Willy Chaudat, Charenton-le-Pont, FR;
Essilor International, Charenton-le-Pont, FR;
Abstract
A spectacle lens includes an activable optical filter having at least an electrochromic device and being configured to be actively switched between at least three configurations. In the first configuration, the activable optical filter is uniform. In the second configuration, the activable optical filter attenuates selectively light from a localized light source. In the third configuration, the activable optical filter is uniform. Furthermore, the chromaticity difference ΔChrom between each of the configurations is smaller than or equal to 20.