Electroluminescent techniques and devices

Abstract

Abstract New electroluminescent techniques and devices are disclosed which render a product that is more commercially saleable, reliable, and economically feasible than heretofore was the case in the art. A stacked, multi-layered electroluminescent device is generally provided, comprising a first supporting layer or sheet of Mylar, for example, a front electrode that is transparent or at least translucent to visible light, a phosphor-filled layer of dielectric material, an additional dielectric layer if desired, and a rear electrode plate. Disposed in intimate contact with the front electrode and preferably between the electrode and the phosphor-filled layer is a web of electrically conductive filaments to obviate deleterious effects of electrode separations. The provision of a photo-sensitive electrically conductive material as the rear electrode is contemplated, which material can be photographically exposed and then developed so as to produce any desired pattern or configuration of electroluminescence. The phosphor-filled layer itself is contemplated to comprise a chemically inert layer of polypropolyene, for example, this layer being made electrically conductive by the insertion of a plurality of electrically conductive particulates dispersed throughout so as to thereby effectively control the dielectric constant thereof. Desirably, the electrically conductive particulates comprise phosphor particles novelly processed to include an adsorbed layer in the form of a glass coating thereon, the glass coating itself being provided with a discontinuous layer of stannous oxide.

Inventors

• 👤 Sam L Leach

Bibliographic Details