A thin film electroluminescent edge emitter structure operable as an electronically controlled, high resolution light source includes a plurality of TFEL assemblies disposed in array-like fashion on a layer of substrate material. Each TFEL assembly includes a first layer of electrically conductive material, a second layer of electrically conductive material spaced from the first electrically conductive layer and an electrically energizable, light-emitting composite layer interposed therebetween. At least the second electrically conductive layer of each TFEL assembly is segmented to provide a plurality of second electrically conductive elements, and the plurality of second electrically conductive elements in combination with the remaining layers of the assembly form a pixel group including a plurality of individual light-emitting pixels. The portion of the light-emitting, composite layer associated with an individual pixel of a particular pixel group is operable to emit light energy at the light-emitting face of the individual pixel when a first electrical signal is applied to the first electri­cally conductive layer which is common to the pixel group simultaneously with the application of a second electrical signal to the individual pixel second electrically conductive element.