Patent ID: 8979230
Filing Date: 2015-03-17
Classification: B41J

Abstract:
1. A drive device for driving a liquid jet head, comprising: a nozzle provided with a nozzle opening; a pressure generating chamber communicating with the nozzle opening; a pressure generating element for generating pressure fluctuations inside the pressure generating chamber in response to input of a drive waveform to eject an ink droplet from the nozzle opening; and a drive portion for driving, as a load, the pressure generating element and controlling a state of driving the load, the drive portion comprising: a first drive section for causing a first current to flow to drive the load; and a second drive section for causing a second current smaller than the first current to flow to drive the load, wherein the state of driving the load comprises a first state and a second state, wherein the second drive section causes the second current to flow in a direction in which the load is switched from the first state to the second state from a timing that is faster by a predetermined time determined in advance with respect to a timing at which the first drive section causes the first current to flow for switching the state of driving the load from the first state to the second state, and wherein the second drive section limits the second current to such a current value that a change rate of a voltage of the load, which changes by causing the second current to flow, is smaller than a change rate of the voltage of the load, which changes by causing the first current to flow.