Patent ID: 7802864
Filing Date: 2010-09-28
Classification: B41J,C09K

Abstract:
1. A driving method of an inkjet head including a plurality of nozzles that eject one or more ink droplets to print a dot of a tone corresponding to the number of ink droplets, a plurality of pressure chambers that are communicated with said nozzles respectively, adjacent to each other, and separated by partitions, and a common pressure chamber that supplies ink to said pressure chambers, comprising: providing a plurality of actuators for said pressure chambers that change volumes of said pressure chambers according to drive voltages; and applying a series of drive pulse signals for the number of ink droplets to be ejected as the drive voltage to each of said actuators in each cycle time Tc which is a print cycle of one dot, wherein the cycle time Tc, the number of ink droplets N for a maximum tone, output time Td