发明授权
- 专利标题： Deviation amount detecting device, deviation amount detecting method, and computer-readable recording medium
- 专利标题（中）： 偏差量检测装置，偏差量检测方法和计算机可读记录介质
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申请号： US12353278申请日： 2009-01-14
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公开(公告)号： US07791628B2公开(公告)日： 2010-09-07
- 发明人: Tatsuya Miyadera
- 申请人： Tatsuya Miyadera
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company, Ltd.
- 当前专利权人： Ricoh Company, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： IPUSA, PLLC
- 优先权： JP2008-009515 20080118; JP2009-002699 20090108
- 主分类号： B41J2/435
- IPC分类号： B41J2/435 ; B41J2/47
摘要：
A deviation amount detecting device for use in an electrophotographic color image forming device is configured to correct, during an inter-cycle period in which computation of a first deviation amount using a result of reading of deviation detection patterns is held in a waiting state, a second deviation amount computed using a result of measurement of a scanning time of a light beam, based on a first deviation amount computed at a latest cycle, so that a corrected amount of deviation of a main scanning direction and a corrected amount of deviation of a sub-scanning direction are computed.
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