Patent FR-2957159-A1 (FR)
Title: Electrocontrollable device useful in simple/multiple glazing, comprises a first substrate having glass function, first electronically conductive layer, electroactive system, second electronically conductive layer, and second substrate
Inventor: PIROUX FABIENNE
IPC: B32B17/06
Filed: 2010-03-04
Abstract: The electrocontrollable device having variable optical/energetic properties, comprises a first substrate (V1) having glass function, a first electronically conductive layer (TCC1) with an associated current supply, an electroactive system (EA), a second electronically conductive layer (TCC2) with an associated current supply, and a second substrate (V2) having glass function. The electronically conductive layers are formed by a continuous layer that is divided, by etching, into two independently addressable areas. The electroactive system comprises a medium. The electrocontrollable device having variable optical/energetic properties, comprises a first substrate (V1) having glass function, a first electronically conductive layer (TCC1) with an associated current supply, an electroactive system (EA), a second electronically conductive layer (TCC2) with an associated current supply, and a second substrate (V2) having glass function. The electronically conductive layers are formed by a continuous layer that is divided, by etching, into two independently addressable areas. The electroactive system comprises a medium containing an electroactive organic compound (ea 1+>) capable of reducing and/or accepting electrons and cations acting as compensation charges and electroactive organic compound (ea 2+>) capable of oxidizing and/or ejecting electrons and cations acting as compensation charges. The electroactive organic compounds is electrochrome to obtain a color contrast, and ionic charges allow, under the action of an electric current, oxidation and reduction reactions of the electroactive organic compounds, which are necessary to obtain the color contrast. The ionic charges are placed in a percolation path. Two electronically conductive layers are etched with one another. The etched electronically conductive layer has resistivity of 20-1 omega /square. The conductive layers comprise organic and/or inorganic sublayer and plastic substrates. The ionic charges are carried by electroactive organic compounds, ionic salt and/or an acid dissolved in the liquid. The electroactive system is present in the form of a self-supporting layer including a matrix with the self-supporting layer. The ionic liquid or molten salt forms a solubilizing liquid carrying ionic charges, which have all or part of the ionic charges of the electroactive material. The solubilization liquid is constituted of a solvent or a mixture of solvents. The electroactive system is a gel system formed by the solubilization liquid. The electroactive compounds, the ionic charges and a thickening agent dissolve in the liquid formed by the solvents and ionic liquids and/or molten salts. The matrix is translucent or transparent, when impregnated by the liquid with the solubilized electroactive compounds and ionic charges, and is able to preserve a portion of its integrity once impregnated by the liquid so that the electroactive system is ensured. The matrix is formed by a sheet or a stack of layers, where each layer is a textile or non-textile sheet and the textile sheet has a non-woven veil or mat form, woven or knitted form optionally coated with a binder, which is partially soluble in the liquid to form a gel. The polymer film comprises a non-textile sheet including a homopolymer or copolymer. The porous film is optionally capable of swelling in the liquid comprising ionic charges. The device is operated by transmission or reflection. The substrates are transparent, flat or curved, clear or mass colored or opaque, polygonal or partially curved, and incorporate another functionality such as solar control, anti-glare or self-cleaning functionality.