A lighting device for a display device, according to the present invention, includes a plurality of tubular light sources 17 arranged parallel to one another, and a light reflecting plate 14 arranged on the side of the tubular light sources 17 that corresponds to the opposite side of the light emitting side. The connector slides along the guide which includes, in the interior thereof, some electrical brushes connected to some brass connectors which transport the electricity towards the poles of a male connector from some tracks which, in turn, are connected to the mains or the general electrical installation. Such an arrangement reduces a number of transistor-type voltage controls and associated power consumption, while enabling individual memory cell programming as part of a passive array.