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AssigneeCanon Kabushiki Kaisha
InventorsKimiyuki Hayasaki, Masaki Inaba, Hisashi Fukai
Estimating the term…
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.
An apparatus for correcting a printing density characteristic of a printhead having a plurality of printing elements and memory means capable of storing data, and providing the corrected printhead for a printing apparatus for use of actual printing, comprising:
A method of correcting a printing density characteristic of a printhead having a plurality of printing elements and a memory medium capable of storing data, and providing the corrected printhead for a printing apparatus for use of actual printing, comprising:
Dependencies are inferred from the claim text.