Ink jet recording apparatus and ink jet print head
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 14, 2003
Grant Date -
Feb 21, 2002
app pub date -
May 15, 2001
filing date -
May 16, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink jet recording apparatus is provided which can detect ink in a print head highly precisely with a simple construction. The apparatus includes: a detection electrode to detect, through the ink on the ink jet print head board, a voltage change between print elements and drive elements which is produced as the print elements are driven; a periodical driver to drive the print elements at a predetermined drive frequency; a voltage detector to periodically detect an output voltage of the detection electrode at a timing corresponding to the drive frequency; and a state check device to check an ink ejection state of the ink jet print head according to a result of the detection by the voltage detector.
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