Patent ID: 8052239

Claim:
An inkjet head driving apparatus comprising: an emission timing signal outputting device disposed in common for a plurality of heads so as to output a plurality of emission timing signals based on position data in one emission cycle; a counting device disposed in common for the plurality of the heads so as to count the emission timing signals and to be reset for each emission cycle; setting devices disposed respectively for the plurality of the heads so as to select sequential emission timing signals at which emission starts synchronously, among the emission timing signals in one emission cycle outputted from the emission timing signal outputting device; comparing devices disposed respectively for the plurality of the heads so as to input a setting value of the setting device and a count value of the counting device and to output a signal when the values become equal; head drive wave forming devices disposed respectively for the plurality of the heads so as to form a head drive wave for emission from the signal outputted from the comparing device and to output the head drive wave to the head; first memory devices disposed respectively for the plurality of heads so as to latch and memorize serial data for one cycle of all nozzles representing emission or non emission of nozzles of the head; and second memory devices disposed respectively for the plurality of heads so as to further latch and memorize the data memorized in the first memory device; wherein the heads are driven respectively based on the memorized serial data.