An electroluminescent display device includes an active matrix organic light emitting diode (AMOLED). A pixel array is formed on a light transmissive substrate and electrically coupled to a common power transmission line and conductive material that substantially fills a channel formed between a cover and the substrate. The channel and the conductive may include a cross-sectional area of about 0.5 to 5 mm.sup.2. The conductive material may be a gel, fluid, powder or conductive epoxy and assists the common power transmission line in transmitting power. The substantial cross-sectional area makes the common power transmission line resistant to burn out and is capable of carrying large currents such as needed for display devices having a length or width of 30 inches.