Ink jet recording apparatus and method with modulatable driving pulse width
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United States of America Patent
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-
Dec 18, 2001
Grant Date -
N/A
app pub date -
Jul 31, 1995
filing date -
Jul 29, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
An ink jet recording apparatus, in which thermal energy is applied to ink in accordance with a driving signal applied to a heater to produce a bubble, by which ink is ejected onto a recording material, includes a driver for applying a plurality of driving signals to the heater for one ejection of one ink droplet. The driving signals comprise a first driving signal not ejecting the ink and a second driving signal for ejecting the ink, the second driving signal being applied after a rest period after the first driving signal. The apparatus further includes a controller for changing an amount of ink ejected by changing a length of the rest period and changing the first driving signal. The controller effects its changing operation in a first changing region in which the rest period is changed without changing the first driving signal and in a second changing region in which a length of the first drive signal is changed.
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