B - Operations – Transporting – 41 – J
Patent
B - Operations, Transporting
41
J
B41J 29/00 (2006.01) B41J 2/05 (2006.01) B41J 11/00 (2006.01) G06F 3/12 (2006.01) G06K 15/10 (2006.01)
Patent
CA 2169816
An apparatus and method for correcting printing characteristics of a full-line printhead, and producing a high-printing quality printhead at high manufacturing yield, a corrected printhead by this apparatus, and a printer employing this printhead. According to this method, an image is printed on a printing medium by using double pulses obtained based on fluctuation of resistance of each printing unit of a printhead, and a reference OD value is determined from an OD value histogram of the printed image. A preheating pulse width is selected, based on OD values of n printed images obtained by changing the preheating pulse width n times and the reference OD value, such that an OD value on each printing element is equal or close to the reference OD value. For example, assuming that the reference value is 0.43, a preheating pulse width on printing element No. 3 is 0.875 µ sec.
Hayasaki Kimiyuki
Inaba Masaki
Canon Kabushiki Kaisha
Ridout & Maybee Llp
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