Improved electrochromic layer and devices comprising same

G - Physics – 02 – F

Patent

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Details

G02F 1/15 (2006.01) C09K 9/02 (2006.01)

Patent

CA 2248861

The present invention provides improved electrochromic layers, which comprise polymeric matrices with electrochromic solutions interspersed therein. Varying an electrical potential difference across a layer of the invention results in reversible variation in the transmittance of light across the layer because of electrochemical processes in the electrochromic solution of the layer. The invention further provides electrochromic devices, in which the electrochromic layers of the invention provide reversibly variable transmittance to light, and various apparatus in which the devices of the invention provide light- filtering or light-color modulation. Such apparatus include windows, including those for use inside and on the outside walls of buildings and in sunroofs for automobiles, and variable reflectance mirrors, especially rearview mirrors for automobiles.

Couches électrochromiques améliorées, comprenant des matrices polymères contenant des solutions électrochromiques intercalées à l'intérieur. En faisant varier une tension électrique aux bornes d'une couche du produit, on obtient une variation réversible de la transmittance de la lumière aux bornes de la couche en raison des processus électrochimiques dans la solution électrochromique de la couche. L'invention comporte également des dispositifs électrochromiques, dans lesquels les couches électrochromiques de l'invention assurent une transmittance à la lumière variable de façon réversible, et différents dispositifs dans lesquels les produits décrits assurent un filtrage de lumière ou une modulation de couleur de la lumière. Les dispositifs décrits sont des fenêtres, notamment les fenêtres destinées aux parois intérieures et extérieures des bâtiments, des panneaux de toits ouvrants pour automobile, et des miroirs à réflectance variable, en particulier rétroviseurs pour automobiles.

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