Method and apparatus for correcting print density by printhead,

Details Method and apparatus for correcting print density by printhead, Method and apparatus for correcting print density by printhead,

1997-11-07

2000-07-25

Au, Amelia

Facsimile and static presentation processing

Static presentation processing

Attribute control

347188, B41B 1500, B41J 1500, G06F 1500

Patent

active

060942800

ABSTRACT:
A high-yield printhead where density unevenness is surely corrected taking into consideration various factors related to manufacturing processes of the printhead, a printer utilizing the printhead, and an apparatus and method for correcting print density unevenness by the printhead, are provided. According to the method, a plurality of correction tables generated based on the data reflecting the various factors related to manufacturing processes of the printhead are prepared in advance. A test print pattern is printed by using a full-line printhead having a memory for storing correction data, and a tendency of density distribution of the printed pattern image is analyzed. On the basis of the tendency of the density distribution obtained as a result of the analysis, the most appropriate correction table is selected from the plurality of stored correction tables. Then, correction data which is used for suppressing density unevenness is generated on the basis of the selected most appropriate correction table, and the generated correction data is transmitted to the memory of the printhead.

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