Saint-gobain Vitrage

James Barton

Francois Lerbet

Jean-Claude Peraud

Solange Ettori

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.

Electrochromic system with less than 30 seconds switching time

The invention relates to techniques for surface deionization of glass under the effect of a corona discharge. The invention consists of treating the object which is movable in relation to the electrodes situated at a short distance from said object which is brought to a high temperature. The treatment is carried out under a continuous current which is regulated in intensity. The treatment is accordance with the invention is preferably applied to sheets of glass during their production.

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Paris, France

James Barton