Saint-gobain Vitrage International

Saint-gobain Vitrage

Xavier Ripoche

Philippe Macquart

Marc Ast

This invention concerns an electrochromic pane comprising a principal functional film constituted of a material which, under the effect of an electric current, is capable of reversibly inserting cations and which has characteristics of coloration and/or transmission in certain wavelengths of electromagnetic radiation that differ for its inserted and deinserted states. Said principal functional film has a quasi-columnar structure, with axes of growth of the columns parallel to straight lines contained within a dihedron, the opening of which is less than 20.degree., and the bisector plane of which makes an acute angle with the substrate.

Electrochromic glazing pane

An electrochromic system comprising a layer of anode electrochromic material with all iridium oxide bass formatted by intensiostatic cycling in a liquid medium comprising a salt of a cation, excluding the proton, that can be inserted in said anode electrochromic material of an alkaline metal.

Electrochromic system

An electrochromic cell, connected to an electrical reference element equivalent to an element of the electrochromic cell of zero surface dimensions and zero electrolyte thickness, connected in series with a resistance R.sub.i identical to the ion resistance of the electrochromic cell (reduced to a same zero surface), a potential difference applied by a generator, in coloration and decoloration respectively, being such that the voltage at the terminals of the reference element is kept at a value below a coloration reference voltage or decoloration reference voltage respectively.

Electrical supply for an electrochromic cell

An electrochromic system for controlling the color state of an electrochromic pane. The charge needed to obtain the desired color is determined from the discharge potential of the system and the coloration set-point. An integrator measures the charge passing through the system and compares it to the charge to be transferred. This charge is measured by a differential amplifier which compares a discharge potential measured by a capacitor with a selected color set-point.

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Paris, France

Xavier Ripoche