초록

An electroluminescent device adapted to serve as the dial of a conventional analog timepiece, with a central aperture for the stem carrying the timepiece hand and inscribed on the upper surface thereof with conventional time-indicating indicia, so that it can be read as a normal watch dial.

대표청구항 ▼

An electroluminescent dial for a wristwatch of the type having at least one rotatable stem carrying a time indicating hand, said electroluminescent dial comprising: a single sheet of transparent insulating substrate formed in the shape of a watch dial and having timekeeping indicia printed on one su

An electroluminescent dial for a wristwatch of the type having at least one rotatable stem carrying a time indicating hand, said electroluminescent dial comprising: a single sheet of transparent insulating substrate formed in the shape of a watch dial and having timekeeping indicia printed on one surface thereof toward said hand and having a first layer comprising electrically conductive material adhered to the opposite surface thereof, a second layer comprising an electroluminescent mixture adhered to said first layer, said mixture comprising phosphor particles, uniformly dispersed within an epoxy resin binder, a third layer comprising a thin insulating moisture resistant barrier material adhered to said second layer, a fourth layer comprising electrically conductive material adhered to said third layer, said substrate and said first, second, third and fourth layers together comprising a single laminated assembly, means for making electrical connections to said first and fourth layers, and said electroluminescent dial further defining a center hole through said substrate and through said layers for accommodating said rotatable stem.