Patent ID: 6917351

Claim:
In an energy recovery system for recapturing energy stored in the capacitance of an AC gas discharge plasma display panel having a multiplicity of pixels and rows, each pixel being defined by a row scan electrode Y, a bulk sustain electrode X, and a column data electrode, each row being defined by a pair of adjacent parallel electrodes consisting of a row scan electrode Y and a bulk sustain electrode X, a first row consisting of a row scan electrode Y 1 and a bulk sustain electrode X 1 , the sustain voltage to Y 1 having a polarity 1 and the sustain voltage to X 1 having an opposite polarity 2 , a second row consisting of a row scan electrode Y 2 and a bulk sustain electrode X 2 , the sustain voltage to Y 2 ha a polarity 2 and the sustain voltage to X 2 having an opposite polarity 1 , a first energy recovery circuit connected between Y 1 and Y 2 and a second energy recovery circuitry connected between X 1 and X 2 , the improvement wherein said first and second energy recovery circuits are simultaneously operated such that the energy stored in the capacitance of the first row consisting of row scan electrode Y 1 and bulk sustain electrode X 1 is directly transferred to the second row consisting of row scan electrode Y 2 and bulk sustain electrode X 2 and the energy stored in the capacitance of the second row consisting of row scan electrode Y 2 and bulk sustain electrode X 2 is directly transferred to the first row consisting of row scan electrode Y 1 and bulk sustain electrode X 1 , both energy transfers being simultaneous without using an external storage capacitor.