an array of addressable , electrically isolated , light emitting diodes are fabricated in the substrate of a monolithic device . discrete regions of the array constitute respective pixels of the array . each array pixel has at least three diodes . two diodes are commonly addressable and a third diode interleaved between the commonly addressable diodes is separately addressable . each diode of an array pixel , when addressed is forward biased and produces output light which is emitted from its pixel and forms a light image on a corresponding pixel of an image zone . the selectively addressing of the leds of the array pixels causes the addressed leds to emit light and provide different gray scale light images at corresponding image zone pixels .