An apparatus for driving a capillary discharge plasma display panel having first and second substrates spaced apart, a plurality of pairs of first and second electrodes arranged between the first and second substrates, a dielectric layer formed between the first and second electrodes, at least one capillary in the dielectric layer between the each pair of the first and second electrodes for generating a capillary discharge, the apparatus includes a plurality of cells selectively discharging to glow defined by the pairs of the first and second electrodes, and an address circuit for applying a triangular pulse waveform during a sustain period to stabilize the capillary discharge.