A display device comprises row (5) and column (6) electrodes provided on a front plate and a light guide, a moveable element (3) provided with a common electrode (7), and means (17) for supplying voltages to the electrodes. A controllable image element is thereby formed on a crossing of the row and column electrodes. In dependence on driving pulses received by the electrodes, the moveable element can be set either to the front plateor the back plate. At one side of the light guide, light generated by a light source is coupled into the light guide. When the moveable element is in contact with the light guide, light is coupled out of the light guide at that location. Collimating means situated between the light source and the light guide improve the uniformity of the display device.