Inkjet printing apparatus which determines residual ink amount, and method of detecting ink
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United States of America Patent
Stats
-
Jan 11, 2000
Grant Date -
N/A
app pub date -
Mar 18, 1997
filing date -
Mar 22, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A printing apparatus which can detect remaining ink with high precision regardless of trembles of ink surface in an ink tank caused by various factors such as scanning speed of a carriage, scanning width, impact of the carriage at the time of reversing the carriage scanning direction and the like, and can perform printing by efficiently utilizing the remaining ink, and a facsimile apparatus using the above printing apparatus. According to the apparatus, when a CPU controls print operation, the CPU dynamically changes the threshold value as a determination reference, utilized to detect remaining ink on the basis of an output current of a reflection type photosensor, in accordance with the scanning speed of carriage movement, the scanning width, and the stop period for reversing the scanning direction.
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