Abstract: The display device includes a housing having a viewing opening, an angularly disposed light transmitting mirror dividing the housing into rear and front display compartments located at right angles to each other, and lamps for illuminating each of the display compartments. One of the lamps is sequentially and alternately brightened, while the other is simultaneously dimmed, by a control including a pair of photocells which control the electrical power to each of the lamps in response to the amount of light falling thereon, a light source adapted to emit light onto both of the photocells and an opaque disc which is interposed the light source and the photocells and is slowly rotated by a motor. The disc includes a window portion which is arranged to sequentially and alternately gradually vary the amount of light from the light source reaching each of the photocells during the rotational cycle of the disc.