Head unit
AssigneeSeiko Epson Corporation
InventorsKazuhito Fujisawa, Ryota Furukawa
Life of this patent
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Abstract
A head unit includes a discharge section, a determination circuit, and a discharge limitation circuit. The discharge section is equipped with a piezoelectric element that is configured to be displaced in accordance with changes in potential of a drive signal when the drive signal is supplied. The discharge section is configured to discharge a liquid in accordance with displacement of the piezoelectric element. The determination circuit is configured to determine whether or not the piezoelectric element has a predetermined power storage capability. The discharge limitation circuit is configured to stop supply of the drive signal to the piezoelectric element and limit discharging of liquid from the discharge section when a result of determination is negative.
Claims14
A head unit comprising:
- a discharge section including a piezoelectric element that is configured to be displaced in accordance with changes in potential of a drive signal when the drive signal is supplied, the discharge section being configured to discharge a liquid in accordance with displacement of the piezoelectric element;
- a determination circuit configured to determine whether or not the piezoelectric element has a predetermined power storage capability;
- and
- a discharge limitation circuit configured to stop supply of the drive signal to the piezoelectric element and limit discharging of liquid from the discharge section when a result of determination is negative.
A head unit comprising:
- a discharge section including a piezoelectric element that is configured to be displaced in accordance with changes in potential of a drive signal when the drive signal is supplied, the discharge section being configured to discharge a liquid in accordance with displacement of the piezoelectric element;
- and
- a diagnostic circuit configured to diagnose a power storage capability of the piezoelectric element, and stop supply of the drive signal to the piezoelectric element and limit discharging of liquid from the discharge section when a result of diagnosis is a predetermined result.
Dependencies are inferred from the claim text.