| 摘要 |
A record head has an actuator which is selectively switchable between a small-capacity state in which the capacity of a pressure chamber connected to an outlet is V1 and a large-capacity state in which the capacity of the pressure chamber is V2 which is larger than V1. A head driving unit selectively supplies, to the actuator, ejection drive signals which change the state of the actuator to eject liquid from the outlet and non-ejection drive signals by which the state of the actuator is changed from the small-capacity state to the large-capacity state and then returns to the small-capacity state, to the extent that no ejection of the liquid occurs from the outlet. The head driving unit successively supplies the non-ejection drive signals to the actuator while causing at least one of a first time and a second time to repeatedly increase and decrease in length, the first time being a time from an increase timing at which the state is changed from the small-capacity state to the large-capacity state to a decrease timing at which the state is changed from the large-capacity state to the small-capacity state, and the second time being a time ranging from an input of a non-ejection drive signal to an input of a directly-subsequent non-ejection drive signal. |
