| 主权项 |
1. A control apparatus for a liquid ejecting head, the liquid ejecting head including nozzle rows in which nozzles that eject a liquid from two or more liquid holding units that hold the same liquid are arranged in rows and an ejection unit that causes the liquid to be ejected through the nozzles, and the control apparatus for the liquid ejecting head causing the liquid to be ejected through the nozzles by driving the liquid ejecting head based on a liquid ejection command when the liquid ejection command has been inputted, the control apparatus comprising:
an input section that obtains a threshold passed signal outputted from a threshold sensor that detects the actual remaining liquid amount in the liquid holding unit, the threshold passed signal indicates that a threshold for a remaining liquid amount has been passed, wherein when the threshold passed signal is inputted from the threshold sensor to the input section while the liquid ejection command is being executed, the control apparatus drives the liquid ejecting head so that the liquid continues to be ejected based on the liquid ejection command until the inputted liquid ejection command ends; a remaining liquid amount estimation unit that estimates a remaining liquid amount that is the remaining amount of liquid held in each of the liquid holding units, wherein in the case where the threshold passed signal has been inputted from at least one of the two or more liquid holding units after the ejection unit has been driven until the inputted liquid ejection command ends, the control apparatus determines whether or not the difference between the remaining liquid amounts estimated by the remaining liquid amount estimation unit from the remaining liquid amount estimation unit is greater than a predetermined value; in the case where the difference between the remaining liquid amounts estimated by the remaining liquid amount estimation unit from the remaining liquid amount estimation unit is greater than the predetermined value, when the next liquid ejection command is executed, the control apparatus carries out control so that the liquid is ejected only through the nozzle rows to which the liquid is supplied from the liquid holding unit that has the greater remaining amount of liquid; and in the case where the difference between the remaining liquid amounts estimated by the remaining liquid amount estimation unit from the remaining liquid amount estimation unit is less than the predetermined value, when the next liquid ejection command is executed, the control apparatus carries out control so that the liquid ejection amount of the nozzle rows to which the liquid is supplied from the liquid holding unit having a higher remaining amount is greater than the liquid ejection amount of the nozzle rows to which the liquid is supplied from the liquid holding unit having a lower remaining amount. |
