Recording head and recording apparatus using the recording head
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United States of America Patent
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Aug 5, 2014
Grant Date -
Dec 23, 2010
app pub date -
Sep 1, 2010
filing date -
Jun 19, 2006
priority date (Note) -
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Abstract
The present invention provides a recording head that has a driving circuit performing driving by dividing a plurality of heaters into a plurality of blocks and supplying electric current on a block-by-block basis based on recording data; a constant current source applying a common bias current to each temperature sensor group obtained by dividing temperature sensors disposed in correspondence to each heater of a plurality of heaters into blocks; a voltage output circuit having a switching element that turns electric current supply to the temperature sensors of the selected temperature sensor group ON and OFF, and obtaining a voltage generated at both terminals of the selected temperature sensor by supplying an electric current to the temperature sensor; and an amplifier circuit amplifying the detection voltages.
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