发明名称 |
Image scanning device and image forming apparatus with varying document size detection periods |
摘要 |
An image scanning device includes a document table; a document pressing unit configured to press a document placed on the document table; a scanning unit including a light source for illuminating the document and configured to optically scan the document; an open/close detection unit configured to detect opening and closing of the document pressing unit; and a control unit configured to cause the scanning unit to move parallel to the document and thereby to detect a size of the document when the closing of the document pressing unit is detected by the open/close detection unit or when a scanning start signal is detected. The control unit detects the size of the document within a document size detection period that is changeable according to a speed of closing the document pressing unit, and turns on and off the light source based on the document size detection period. |
申请公布号 |
US8248670(B2) |
申请公布日期 |
2012.08.21 |
申请号 |
US20090382846 |
申请日期 |
2009.03.25 |
申请人 |
SHINKAWA SHOHEI;RICOH COMPANY, LTD. |
发明人 |
SHINKAWA SHOHEI |
分类号 |
H04N1/40 |
主分类号 |
H04N1/40 |
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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