Print head substrate, print head using the same, and printing apparatus
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United States of America Patent
Stats
-
Jun 5, 2001
Grant Date -
N/A
app pub date -
Jan 2, 1998
filing date -
Sep 2, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention is directed to resolve the noise problem with the ink in an ink jet head without changing the substrate manufacturing process for the ink jet head, that is, increasing the cost on the manufacture, and without needs of disposing a noise countermeasure component on the side of the printer main device, or making the design change for the countermeasure. The present invention is characterized in that to prevent malfunction from arising by the noise, a hysteresis circuit to provide different input data threshold values upon rising and falling is provided on an input portion of the signal for a drive control logic system such as a drive input signal for a shift register and a latch circuit on the same substrate as that of the heating elements, the driver and the drive control logic circuit, utilizing a diffusion layer constituting a driver.
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