Printing apparatus
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United States of America Patent
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Jul 22, 2014
Grant Date -
Jan 12, 2012
app pub date -
Jun 30, 2011
filing date -
Jul 7, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A printing apparatus includes a printhead incorporating a temperature sensor, a control unit which controls the printhead, and a flexible cable which connects the printhead and the control unit. The flexible cable includes a first signal line and second signal line which generate voltages corresponding to the temperature of the printhead, and are connected to the temperature sensor. A differential amplifier circuit which is incorporated in the control unit amplifies the voltage difference between the first signal line and the second signal line to output the amplified voltage difference as temperature information of the printhead. A matching circuit makes the wiring resistances of the first signal line and second signal line match each other by grounding either the first signal line or the second signal line via a resistor in the printhead.
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