Patent ID: 7808456

Claim:
A driving system for an electroluminescent display having an array of electroluminescent elements arranged in a plurality of rows and columns in such a manner that anodes of the electroluminescent elements arranged along one of the rows or columns are connected to a corresponding anode line, and cathodes of the electroluminescent elements arranged along another of the rows or columns are connected to a corresponding cathode line, the driving system comprising: a row and column control circuit for generating a first control signal and a second control signal according to a display data; an anode line driving circuit in response to the first control signal for switching each of the anode lines among connections of a current source, a first virtual voltage node, and ground; and a cathode line scanning circuit in response to the second control signal for switching each of the cathode lines among connections of a reverse voltage, a second virtual voltage node, and ground; wherein the first virtual voltage nodes of the anode line driving circuit are directly connected to the second virtual voltage nodes of the cathode line driving circuit for combined equalization of selected anode and cathode lines.