| CPC B41J 2/04563 (2013.01) [B41J 2/04581 (2013.01); B41J 2/14233 (2013.01)] | 8 Claims |
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1. A liquid discharge apparatus comprising:
a head unit that discharges a liquid onto a medium based on a drive signal; and
a heat generation mechanism, wherein
the head unit includes
a print head that discharges the liquid based on the drive signal,
a unit temperature measurement circuit that measures a temperature of the head unit as unit temperature information and outputs a unit temperature signal including the unit temperature information, and
a temperature information output circuit to which the unit temperature signal and a head temperature signal including head temperature information corresponding to a temperature of the print head are input and which outputs a temperature information signal,
the print head includes
a piezoelectric element which includes a first electrode, a second electrode, and a piezoelectric body, in which the piezoelectric body is positioned between the first electrode and the second electrode in a stacking direction in which the first electrode, the second electrode, and the piezoelectric body are stacked, and which is driven by receiving the drive signal,
a vibration plate that is positioned on one side of the piezoelectric element in the stacking direction, and is deformed by driving the piezoelectric element,
a pressure chamber substrate that is positioned on one side of the vibration plate in the stacking direction, and is provided with a pressure chamber of which a volume changes due to deformation of the vibration plate,
a nozzle that discharges the liquid in response to a change in the volume of the pressure chamber, and
a head temperature measurement section that is positioned on the other side of the vibration plate in the stacking direction, measures the head temperature information corresponding to a temperature of the pressure chamber, and outputs the head temperature information as the head temperature signal, and
the temperature information output circuit corrects the head temperature information output as the temperature information signal based on the unit temperature information and the head temperature information which are input when the heat generation mechanism generates heat at a predetermined temperature.
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