Patent ID: 8186795

Claim:
A liquid droplet jetting apparatus which jets a droplet of a liquid from a nozzle in a plurality of jetting modes, selectively, which are different from each other in a volume of the droplet, the apparatus comprising: a first jetting mode memory which stores information about a plurality of first jetting modes; a time-sequence information memory which stores time-sequence information of the first jetting modes, which is associated, for each of jetting timings of the nozzle, with one of the first jetting modes stored in the first jetting mode memory; a second jetting mode memory which stores information about a plurality of second jetting modes of which number is more than that of the plurality of first jetting modes; and a jetting mode selector which selects, at a certain jetting timing, a second jetting mode among the plurality of second jetting modes stored in the second jetting mode memory, based on one first jetting mode associated with the certain jetting timing and another first jetting mode associated with a successive jetting timing which is at least one of previous and subsequent jetting timings of the certain jetting timing, included in the time-sequence information stored in the time-sequence information memory, wherein the jetting mode selector selects, at the certain jetting timing, the second jetting mode among the plurality of second jetting modes, such that a difference in the volume of the droplet between the second jetting mode at the certain jetting timing and the first jetting mode at the successive jetting timing is less than that between the first jetting mode at the certain jetting timing and the first jetting mode at the successive jetting timing.