Patent ID: 8736946
Filing Date: 2014-05-27
Classification: G02F

Abstract:
1. A transparent electrochromic system, allowing clear vision through said system, and comprising: first and second outer walls defining a closed volume, the system being transparent for a direction of gaze passing through the outer walls and said closed volume between two opposite sides; a liquid or gel contained in the closed volume; first and second electroactive substances distributed in the liquid or gel, with respective oxidation-reduction potential values that are different, at least some of the first and second electroactive substances having an optical effect that varies between an oxidised form and a reduced form of said substances; a pair of transparent first and second supply electrodes, together supported by the first outer wall, and configured to be connected respectively to two output terminals of a first variable electrical source for supplying the system with electric current, so as to transfer electrons to or from at least some of the electroactive substances, in a reverse mode between said first and second electroactive substances at a same moment of operation of the system; and a pair of transparent first and second polarisation electrodes together supported by the second outer wall and having no contact with said supply electrodes within the system, said first polarisation electrode being situated opposite the first supply electrode and on an opposite side of the closed volume with respect to the first supply electrode along a direction perpendicular to the outer walls, and said second polarisation electrode being situated opposite the second supply electrode and on an opposite side of the closed volume with respect to the second supply electrode along a direction perpendicular to the outer walls, the first polarisation electrode and the first supply electrode being configured to be further connected respectively to two output terminals of a second variable electrical source, the output terminals of said first and second variable electrical sources that are connected to the first supply electrode being configured to have respective polarities that are identical at least at some moments of operation of the system, said polarities being considered respectively with respect to the other output terminal of the corresponding electrical source.