Printing element substrate, printhead, and printing apparatus
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United States of America Patent
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May 5, 2015
Grant Date -
Jan 29, 2015
app pub date -
Jun 30, 2014
filing date -
Jul 29, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A printing element substrate, comprising a printing element, a MOS transistor having a drain terminal, a source terminal and a back gate terminal, the drain terminal being connected to a first power supply node for receiving a first voltage, and a source terminal and a back gate terminal being connected to the printing element, and a unit including a second power supply node different from the first power supply node, and configured to supply a second voltage to a gate terminal of the MOS transistor, wherein, when the first voltage is not supplied to the first power supply node, the unit controls a potential of at least one of the gate terminal and the drain terminal so that a potential difference between the gate terminal and the drain terminal becomes lower than the second voltage.
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