Back to results
US 2008/0074459 A1Published application
Method and printing system for verifying and compensating skewness of a printhead
OwnerHao-Wei Chang, Po-Chin Yanginventors
Life of this patent
Estimating the term…
Abstract
A printing system outputs an alignment pattern using a printhead where its skewness is to be calibrated. The skewness of the printhead can be detected according to the pattern match of the alignment pattern. The available number of nozzles to be used on the printhead is then determined according to the skewness of the printhead, which thereby reduces the influence of skewness of the printhead.
Claims20
A method for verifying and compensating skewness of a printhead, comprising:
- storing a skew verification pattern comprising a first segment set and a second segment set wherein the first segment set and the second segment set each comprises a plurality of numbered segments;
- printing an alignment pattern according to the skew verification pattern, the alignment pattern comprising a first aligning segment set and a second aligning segment set wherein the first aligning segment set and the second aligning segment set each comprises a plurality of numbered aligning segments;
- selecting a first aligning segment from the first aligning segment set and a second aligning segment from the second aligning segment set wherein the first aligning segment and the second aligning segment are aligned with each other and have the same number;
- and determining the number of nozzles to be used on the printhead according to a comparison result of the number corresponding to the selected first and second aligning segments and a skewness tolerance value.
1 more element
A printing system for verifying and compensating skewness of a printhead, comprising:
- a memory for storing a skew verification pattern comprising a first segment set and a second segment set wherein the first segment set and the second segment set each comprises a plurality of numbered segments;
- a printhead for printing an alignment pattern according to the skew verification pattern, the alignment pattern comprising a first aligning segment set and a second aligning segment set wherein the first aligning segment set and the second aligning segment set each comprises a plurality of numbered aligning segments;
- a selector for selecting a first aligning segment from the first aligning segment set and a second aligning segment from the second aligning segment set wherein the first aligning segment and the second aligning segment are aligned with each other and have the same number;
- and
- a control unit for determining the number of available nozzles to be used on the printhead according to a comparison result of the number corresponding to the selected first and second aligning segments and a skewness tolerance value.
2 more elements
Dependencies are inferred from the claim text.