Color image reproducers

Claim 1

AN IMAGE SCREEN STRUCTURE FOR A COLOR IMAGE REPRODUCER COMPRISING: A FIRST TARGET ELEMENT GROUP COMPRISING A MULTIPLICITY OF INDIVIDUAL TARGET ELEMENTS EACH COMPRISING AN ELECTROLUMINESCENT MATERIAL WHICH EFFECTIVELY EMITS LIGHT OF A FIRST PRIMARY COLOR WHEN EXCITED BY AN ELECTRICAL FIELD WITHIN A PREDETERMINED INTENSITY RANGE AND A SEMICONDUCTIVE MATERIAL WHICH VARIES IN CONDUCTIVITY WHEN SUBJECTED TO CORPUSCULAR-ENERGY BOMBARDMENT; A SECOND TARGET ELEMENT GROUP COMPRISING A MULTIPLICITY OF INDIVIDUAL TARGET ELEMENTS INTERSPERSED WITH SAID FIRST GROUP OF TARGET ELEMENTS IN A PREDETERMINED GEOMETRIC PATTERN THROUGHOUT AN IMAGE SCREEN AREA, EACH OF SAID TARGET ELEMENTS OF SAID SECOND GROUP BEING STRUCTURALLY SIMILAR TO THE TARGET ELEMENTS OF SAID FIRST GROUP BUT COMPRISING AN ELECTROLUMINESCENT MATERIAL, WHICH, WHEN EXCITED, EFFECTIVELY EMITS LIGHT OF A SECOND PRIMARY COLOR; AND ELECTRICAL CONNECTOR MEANS FOR ESTABLISHING SEPARATELY CONTROLLABLE ELECTRICAL FIELDS ACROSS SAID TWO GROUPS OF TARGET ELEMENTS, SAID CONNECTOR MEANS INCLUDING A PAIR OF ELECTRICALLY CONDUCTIVE ELEMENTS IN CONTACT WITH RESPECTIVE SURFACES OF SAID TARGET ELEMENT GROUPS.