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. 23, 1992
Filed:
Jul. 11, 1990
James Barton, Paris, FR;
Francois Lerbet, Paris, FR;
Saint-Gobain Vitrage, Courbevoie, FR;
Abstract
The invention relates to an electrochromic glazing consisting of two glass sheets (1, 4) coated with first and second transparent electroconductive layers (2, 5), separated by a layer of an electrochromic material (9), an electrolyte (8) and a counterelectrode (7), said transparent electroconductive layers (2, 5) each being provided with an electroconductive strip (3, 6) parallel to the length of the glazing, made of a material whose electric conductivity is high relative to that of transparent electroconductive layers (2, 5). The electroconductive strips (3, 6) are placed along the opposite edges of the glazing and are connected to a voltage generator which applies in coloring phase (or in fading phase), between two points A and B on the electroconductive strips (3, 6) a potential difference U.sub.1 =(V.sub.A -V.sub.B) (t) so that between point A on the electroconductive strip on the first electroconductive layer and a point R on the second electroconductive layers, directly facing point A, there is a potential difference U.sub.2 =(V.sub.A -V.sub.R) (t)=U.sub.o , where U.sub.o is constant and chosen from the stability range of the coloring (or fading) reaction.