Electroluminescent display device with selected indicia

Claim 1

AN ELECTROLUMINESCENT DISPLAY DEVICE COMPRISING A SEGMENTED BACK ELECTODE ASSEMBLY COMPRISED OF A THERMOPLASTIC BASE SHEET PROVIDED ON ONE SIDE WITH A PLURALITY OF CIRCUIT LEADS CONSISTING OF COATINGS OF ELECTRICALLY CONDUCTIVE MATERIAL AND AN APERTURED INSULATOR SHEET OF LOW DIELECTRIC CONSTANT ORGANIC THERMOPLASTIC MATERIAL ADHERED AT ONE SIDE TO SAID BAASE SHEET OVER THE SAID CURCUIT LEADS THEREON AND HAVING A PLURALITY OF DISCRETE ELECTRODE SECTIONS ON ITS OTHER SIDE COMPRISED OF COATINGS OF ELECTRICALLY CONDUCTIVE MATERIAL FORMING A SEGMENTED BACK ELECTRODE, SADI INSULATOR SHEET HAVING A PLURALITY OF APERTURES THEREIN REGISTERED WITH RESPECTIVE ONES OF AND THROUGH WHICH THE SAID ELECTODE SECTIONS AND CIRCUIT LEADS ARE ELECTRICALLY INTERCONNECTED, AN ELECTROLUMINESCENT PHOSPHOR LAYER OVERLYING THE SAID INSULATOR SHEET AND THE SEGMENTED BACK ELECTRODE THEREON, AND A LIGHT-TRANSMITTING FRONT ELECTODE LAYER OVERLYING SAID PHOSPHOR LAYER, SAID CURCUTI LEADS ECTENDING TO THE EDGE OF THE SAID BASE SHEET AND BEING INSULDATED BY SAID INSULATOR SHEET FROM CAPACITIVELY COUPLING TO THE SAID FRONT ELECTRODE UPON APPLICATON OF AN A.C. POTENTIAL TO THE SAID LEADS AND FRON ELECTRODE.