Method of driving and controlling ink jet print head, ink...

Details Method of driving and controlling ink jet print head, ink... Method of driving and controlling ink jet print head, ink...

2005-03-22

2005-03-22

Meier, Stephen D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S011000, C347S016000, C347S014000

Reexamination Certificate

active

06869157

ABSTRACT:
An increase in variation in resistance value resulting from a reduction in thickness of heaters is dealt with without increasing the manufacture costs of the print head, by allowing smaller ink droplets to be efficiently ejected. A setting for a pulse voltage essentially varied depending on the ejection threshold energy of the head is employed so that optimum drive power conditions can be reasonably set over a range of varying resistance values resulting from differences among manufactured print heads. This provides a print head and a printing apparatus which can deal with an increase in differences among manufactured heads by allowing smaller ink droplets to be efficiently ejected without reducing the yield of manufactured print heads.

REFERENCES:
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patent: 6024439 (2000-02-01), Sueoka
patent: 6302507 (2001-10-01), Prakash et al.
patent: 6439696 (2002-08-01), Murakami et al.
patent: 4-76077 (1995-03-01), None

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