| 摘要 |
An ink jet printing apparatus in which, among two types of ink droplets of small and large sizes ejected from a nozzle, only the ink droplets of small size are electrically charged in accordance with an information signal, deflected and directed toward a recording medium to produce thereon a desired image. The state in which the ink droplets are produced is detected by detecting means disposed in the vicinity of a flight path of the ink droplets. On the basis of the output signal produced from the detecting means, intensity of excitation imparted to the nozzle is set at a level at which the ink droplets of small size are stably produced. Further, the intensity of excitation imparted to the nozzle is corrected on the basis of the output signal available from the detecting means through phase matching means for causing generation of the small size ink droplet to coincide with phase of the information signal.
|
