Patent ID: 7080784

Claim:
A method for operating a visual display panel for displaying a character, the visual display panel being of the type comprising a plurality of individually addressable pixels, the pixels being alternately and selectively operable in a first light transmitting mode and in a second light scattering mode, characterised in that the pixels are alternately and selectively operable in one of the first light transmitting mode and the second light scattering mode for forming a background, and in the other of the first light transmitting mode and the second light scattering mode for defining the character against the background, the visual display panel having a front major face from which the character is viewable, and an opposite rear major face, the method comprising projecting light onto the rear major face of the panel from the rear thereof, so that the projected light only falls on the pixels which are being operated in one of the first light transmitting mode and the second light scattering mode for enhancing the contrast between the pixels operating in the respective first light transmitting mode and the second light scattering mode.