Printhead, printing apparatus comprising said printhead, and print control method thereof
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United States of America Patent
Stats
-
Nov 23, 2004
Grant Date -
Nov 20, 2003
app pub date -
May 15, 2003
filing date -
May 17, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates to a printhead, a printing apparatus comprising the printhead, and a print control method thereof. The printhead includes a plurality of heating elements and a driving circuit for electrifying and driving the heating elements. The printhead comprises: a shift register for serially inputting digital data, supplied from an external unit, and retaining the data; a counter for counting a clock; a comparator for comparing time-length data, included in the digital data, with a counted value of the counter, and outputting a match signal when a match is found; and a flip-flop circuit for enabling a driving signal in response to a driving start signal supplied from an external unit, and disenabling the driving signal in response to the match signal outputted based on the counted value of the counter from the driving start signal.
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