A plurality of first electrodes, e.g. the anodes, of light emitting devices 12 are connected by horizontal electrical conductors 16 to define rows of pixels, and a plurality of second electrodes, e.g. the cathodes, of light emitting devices 12, are connected by vertical electrical conductors 17 to define columns of pixels, thereby forming a LED display chip 14, or LEDI chip, from an addressable ar