Sphere-supported thin film phosphor electroluminescent devices

H - Electricity – 01 – L

Patent

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Details

H01L 29/00 (2006.01) G09F 9/33 (2006.01) H05B 33/14 (2006.01) H05B 33/26 (2006.01) H01L 33/00 (2006.01)

Patent

CA 2537476

The present invention provides an electroluminescent display device using dielectric spheres embedded in a flexible electrically conducting substrate. Each of the spherical dielectric particles has a first portion protruding through a top surface of the substrate and a second portion protruding through the bottom surface of the substrate. An electroluminescent phosphor layer is deposited on the first portion of each spherical dielectric particles and a continuous electrically conductive, substantially transparent electrode layer is located on the top surfaces of the electroluminescent phosphor layer and areas of the flexible electrically insulating substrate located between the top surfaces of the electroluminescent phosphor layer. A continuous electrically conductive electrode layer coated on the second portion of the spherical dielectric particles and areas of the flexible, electrically insulated substrate located between the second portions of the spherical dielectric particles.

La présente invention porte sur un afficheur électroluminescent utilisant des billes diélectriques encastrées dans un substrat flexible électroconducteur. Chacune des particules diélectriques sphériques possède une première partie faisant saillie par une surface supérieure du substrat et une seconde partie faisant saillie par la surface inférieure du substrat. Une couche de phosphore électroluminescente est déposée sur la première partie de chacune des particules diélectriques sphériques et une couche d'électrode continue électroconductrice, sensiblement transparente est placée sur les surfaces supérieures de la couche de phosphore électroluminescente et des régions du substrat flexible électro-isolant placé entre les surfaces supérieures de la couche de phosphore électroluminescente. Une couche d'électrode continue électroconductrice est appliquée sur la seconde partie des particules diélectriques sphériques et sur les régions du substrat flexible, électro-isolant placé entre les secondes parties des particules diélectriques sphériques.

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