发明名称 |
Locating method of an optical sensor, an adjustment method of dot printing position using the optical sensor, and a printing apparatus |
摘要 |
There is provided a printing registration method for stably performing printing registration in bi-directional scanning by a print head in a printing apparatus or printing registration between a plurality of print heads with high accuracy. In complementary printing by the bi-directional scanning by the head, a plurality of patterns are printed while printing starting timings are shifted by predetermined quantities with respect to reference dots (dots formed by forward scanning). In the pattern, an area factor defined by the dots formed by the printing is varied according to the shifting. The plurality of patterns are optically read as an average density. The timing corresponding to a point where the read average density is highest can be determined as a printing registration condition. Furthermore, an optical sensor used for the reading is located at a position where an S/N ratio is stable with respect to fluctuations in distance from the object to be read, thus achieving stable reading.
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申请公布号 |
US6547360(B2) |
申请公布日期 |
2003.04.15 |
申请号 |
US19990425989 |
申请日期 |
1999.10.25 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
TAKAHASHI KIICHIRO;OTSUKA NAOJI;NISHIKORI HITOSHI;IWASAKI OSAMU;TESHIGAWARA MINORU;CHIKUMA TOSHIYUKI |
分类号 |
B41J2/01;B41J2/125;B41J2/21;B41J2/51;B41J19/18;B41J29/393;G09F3/00;(IPC1-7):B41J29/393 |
主分类号 |
B41J2/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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