A gray scale level data of each pixel is obtained as data taking 5 levels between 0 and 4 corresponding to the number of ejections from 4 individual discharging portions by the pseudo-halftoning processing. The pointer directs sequentially the memories every time an ejection data is set in responsive...http://www.google.de/patents/US6012796?utm_source=gb-gplus-sharePatent US6012796 - Ink jet recording apparatus and ink jet recording method
