Spd films and light valves incorporating overcoatings

Details Spd films and light valves incorporating overcoatings Spd films and light valves incorporating overcoatings

G - Physics

02

F

G02F 1/167 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2708024

An electro-optical device, e.g., a suspended particle device (SPD) adapted for controlling the transmission of radiation wherein the device is provided with at least one layer of an overcoating adapted to enhance adhesion on at least a portion of a surface between a film serving as a light modulating element and electrode means for applying an electrical field to said film, wherein the overcoating is formed from a material comprising a member selected from the group consisting of (a) titanium dioxide (TiO2) alone and (b) a combination of SiO x and an inorganic material having an index of refraction at 589 nm greater than 1.54. A method of producing the device with the application of such overcoating is additionally described.

L'invention porte sur un dispositif électro-optique, par exemple, un dispositif à particules suspendues (SPD) apte à commander l'émission d'un rayonnement, le dispositif comportant au moins une couche d'un revêtement apte à améliorer l'adhésion sur au moins une partie d'une surface entre un film servant d'élément de modulation de lumière et des moyens d'électrode pour appliquer un champ électrique audit film, ledit revêtement étant formé à partir d'un matériau renfermant un élément choisi dans le groupe constitué par (a) du dioxyde de titane (TiO2) seul et (b) une combinaison de SiOx et d'un matériau inorganique présentant un indice de réfraction à 589 nm supérieur à 1,54. L'invention porte également sur un procédé de production du dispositif avec l'application d'un tel revêtement.

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