Patent ID: 6927749

Claim:
A system for the display of symbols which enables a visual recognition of defective segments, the system comprising: a liquid crystal display having: a transparent first plate, the first plate having transparent at least one conductive segments in a display area to represent symbols and at least one conductive inverse segment which fills out the area surrounding at least one conductive segments; and a second plate facing the first plate, wherein the second plate is conductive in regions that are opposite the at least one conductive segments in the first plate; a liquid crystalline substance located in the space between the first and second plate; and an actuation device for the selective activation of the at least one conductive segments and of the at least one inverse segment, wherein the activation system for a time interval, allows simultaneous activation of the at least one conductive segments and of the at least one inverse segment, such that during the time interval it is possible to recognize failure of any portion of at least one conductive segments by their inverse appearance relative to the at least one inverse segment.