Protective circuit for inkjet printhead
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United States of America Patent
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Apr 28, 2015
Grant Date -
Oct 2, 2014
app pub date -
Mar 26, 2013
filing date -
Mar 26, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An inkjet printhead includes an array of resistive heaters; an array of nozzles associated with the array of resistive heaters; a heater voltage input for providing a heater voltage; a fire control pulse input for providing a fire control pulse having a first pulsewidth for controlling a length of time that current from the heater voltage input is allowed to pass through at least one of the resistive heaters; and a protective circuit configured to receive the fire control pulse from the fire control pulse input, and to override the fire control pulse if the first pulsewidth is greater than or equal to a predetermined length of time.
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