Flexible electroluminescent film laminate

Claim 1

The method of producing a thin flexible electroluminescent element which comprises the steps of: releaseably mounting on a carrier web comprised of a relatively thick flexible plastic film a preformed thin plastic base film, thoroughly and uniformly dispersing in a thermoplastic resin matrix particles of an electroluminescent phosphor, depositing the obtained dispersion as a coating layer on the exposed upper surface of the mounted base film, bonding the phosphor-containing resin coating to the mounted base film by passing the thus coated film and carrier web through calendering rollers under pressure and at elevated temperature; with or without first stripping the carrier web from the coated base film, directly sputtering on the exposed surface of the phosphor-containing resin matrix a thin transparent layer of electrical conducting material to serve as a front electrode; applying to a selected portion of the transparent front electrode an electrical connection terminal formed of a metal having high electrical conductivity; and, after stripping the carrier web from the base film, applying to one or more discrete areas of the exposed underside the base film, a metal facing of high electrical conductivity to serve as one or more back electrodes.

Claim 2

The method of producing a thin flexible electroluminescent element which comprises the steps of: releaseably mounting on a carrier web comprised of a relatively thick flexible plastic film a preformed thin plastic base film, thoroughly and uniformly dispersing in a thermoplastic resin matrix particles of an electroluminescent phosphor, depositing the obtained dispersion as a coating layer on the exposed upper surface of the mounted base film, bonding the phosphor-containing resin coating to the mounted base film by passing the thus coated film and carrier web through calendering rollers under pressure and at elevated temperature; with or without first stripping the carrier web from the coated base film, directly sputtering on the exposed surface of the phosphor-containing resin matrix a thin transparent layer of electrical conducting material to serve as a front electrode; applying to a selected portion of the transparent front electrode an electrical connection terminal formed of a metal having high electrical conductivity; and, after stripping the carrier web from the base film, applying to one or more discrete areas of the exposed underside the base film, a metal facing of high electrical conductivity to serve as one or more back electrodes.