An ink-jet printhead includes a substrate on which an ink chamber is formed, and a nozzle plate to cover the ink chamber, having a nozzle through which ink droplets are ejected from the ink chamber, and formed of a stack of a multi-layer insulating layer. If a motion is detected, the long-time exposure image data read out from the LE memory and processed at a signal processing circuit is outputted through the selector. One of the, repetition patterns is phase-shifted in relation to the other. An adapter mounting the heaters may also be provided for adapting existing crystal pullers to incorporate the heaters.