Printhead and printing apparatus using the same
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United States of America Patent
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Jan 14, 2003
Grant Date -
N/A
app pub date -
Aug 17, 2000
filing date -
Aug 20, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A printhead having a temperature detection circuit on its substrate capable of temperature detection with higher accuracy and at a lower cost, and a printing apparatus using the printhead. In the printhead, the temperature detection circuit is integrated on the substrate where a printhead driving circuit is integrated. The temperature detection circuit generates and amplifies a temperature-independent bandgap voltage as a reference voltage, generates a thermal voltage proportional to an absolute temperature, compares the thermal voltage with the reference voltage, and outputs the result of comparison as digital binary data.
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