Ink-jet apparatus and method of estimating and controlling temperature of ink-jet head thereof
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United States of America Patent
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-
Oct 16, 2001
Grant Date -
N/A
app pub date -
Apr 14, 1998
filing date -
Apr 15, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an ink-jet apparatus for forming images through use of an ink-jet head provided with a plurality of ink ejection heaters with respect to only one ejection orifice, an accurate estimation of temperature of the ink-jet head is made possible by controlling ink-ejection amount in a step-by-step manner. For this purpose, there is provided a device for counting frequency of use of the plurality of heaters within a predetermined period of time independently for each combination of the heaters for ejecting different amount of ink (in steps S1002, S1003), and a combining device for adding a correction value to each of the thus counted value on the basis of the heater driving condition, and converting the total value into the energy applied within a predetermined period (in steps S1008, S1004 and S1005). The estimation of temperature is performed by use of the thus obtained energy.
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