Transparent electrochromic system with a plurality of pairs of supply electrodes

A transparent electrochromic system, providing a 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 oxidized form and a reduced form of said substances;
• a first pair of transparent 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 second pair of transparent supply electrodes separate from the electrodes of the first pair, the electrodes of the second pair being together supported by the second outer wall, the supply electrodes of the second pair being configured to be connected respectively to two output terminals of a second variable electrical source, for supplying the system with electric current, additionally with respect to the first pair of electrodes, by also transferring electrons to or from at least some of the electroactive substances, in a reverse mode between said first and second electroactive substances at the same moment of operation of the system.