Patent ID: 6922180

Claim:
A driving apparatus of a display panel for driving said display panel, having a plurality of row electrode pairs and a plurality of column electrodes aligned to intersect with said row electrode pairs in forming a light emitting display cell at each intersection portion, including a plurality of driving circuits for selectively supplying light-emitting-display driving pulses to said row electrode pairs and said column electrodes through an output terminal, thereby performing light emission drive of said display panel, wherein: each of said driving circuits has a switching resonance charge/discharge circuit for performing generation of said driving pulses, said switching resonance charge/discharge circuit including a switch circuit for forming a forward/reverse current path alternatively between said output terminal and a power collecting capacitive element through an inductance element; and said switch circuit performs a switching operation not only during a light emitting display operation, but also upon power-up, wherein, in a pair of first driving circuits among said plurality of driving circuits which are connected to each of said row electrode pairs, said switch circuit in each of said first driving circuits performs the switching operation in synchronism with each other upon power-up so that pulses of a same polarity are simultaneously supplied to said row electrode pairs, and said power collecting capacitive element in each of said first driving circuits is charged to a midpoint potential of a resonance voltage by said switching operation.