Patent ID: 7052115

Claim:
An ink jet recording apparatus comprising: an ink jet head comprised of a piezoelectric ceramic plate having at least a pair of partition walls with deformable side walls spaced apart at a preselected distance to form a channel for receiving ink and communicating with a nozzle opening, a pair of electrodes each connected to respective ones of the side walls of the partition walls, a wiring substrate mounted with a driving circuit including a driving integrated circuit for applying a driving voltage to the pair of electrodes to deform the side walls of the partition walls of the piezoelectric ceramic plate to vary the volume of the channel to thereby eject ink from the nozzle opening, and data storage means for storing two or more different types of driving information data of the ink jet head including driving condition data; and an external circuit connected to the driving circuit of the ink jet head and having setting means for reading at least the driving condition data stored in the data storage means and automatically setting driving conditions of the ink jet head in accordance with the driving condition data.