Crossed-parallel-conductors system using electroluminescent and photoconductive layers

Claim 1

IN COMBINATION, A CROSSED-PARALLEL-CONDUCTORS SYSTEM COMPRISING TWO GROUPS OF PARALLEL CROSSING CONDUCTORS AND A LAYER OF ELECTROLUMINESCENT MATERIAL DISPOSED BETWEEN THE SAID TWO CONDUCTOR GROUPS, AND SWITCHING MEANS FOR SELECTIVELY APPLYING A POTENTIAL DIFFERENCE BETWEEN ANY TW CROSSING CONDUCTORS OF THE GROUPS, WHEREBY THE REGION OF THE ELECTROLUMINESCENT MATERIAL AT THE SELECTED CROSSING EMITS RADIATION SUBSTANTIALLY ABOVE A GIVEN INTENSITY VALUE AND NEIGHBORING REGIONS OF THE ELECTROLUMINESCENT MATERIAL, DUE TO CAPACITATIVE COUPLING, AT NON-SELECTED MATERIAL, DUE TO CAPACITATIVE COUPLING, AT NON-SELECTED CROSSINGS ALSO EMIT RADIATION BUT WITH AN INTENSITY BELOW SAID GIVEN VALUE; AND AN ASSOCIATED CIRCUIT ARRANGEMENT ADAPTED TO BE ACTIVATED BY THE RADIATION EMITTED FROM THE SAID CROSSED-PARALLEL-CONDUCTORS SYSTEM, SAID CIRCUIT ARRANGEMENT INCLUDING CONDUCTIVE MEANS COUPLED TO A LAYER OF PHOTOCONDUCTIVE MATERIAL ARRANGED GENERALLY OPPOSITE AND PARALLEL TO THE SYSTEM FOR RECEIVING THE RADIATION EMITTED THEREBY TO SELECTIVELY REDUCE THE IMPEDANCE OF THE REGION OF THE PHOTOCONDUCTIVE LAYER IRRADIATED BY THE ASSOCIATED SELECTED REGION OF THE SYSTEM, SAID PHOTOCONDUCTIVE LAYER HAVING A SUPERLINEAR CONDUCTIVITY VS. RADIATION INTENSITY CHARACTERISTIC IN WHICH ITS CONDUCTIVITY REMAINS LOW BELOW A THRESHOLD VALUE OF RADIATION INTENSITY AND ITS CONDUCTIVITY SHARPLY INCREASES, ABOVE SAID THRESHOLD VALUE, SAID THRESHOLD VALUE SUBSTANTIALLY CORRESPONDING TO THE AFORESAID GIVEN INTENSITY VALUE, WHEREBY THE PHOTOCONDUCTIVE REGION IRRADIATED BY THE ASSOCIATED SELECTED REGION OF THE SYSTEM EXHIBITS THE DESIRED LOW IMPEDANCE, WHREAS OTHER PHOTOCONDUCTIVE REGIONS IRRADIATED BY THE NON-SELECTED REGIONS OF THE SYSTEM CONTINUE TO EXHIBIT HIGH IMPEDANCE.