发明名称 |
Document size detecting method and apparatus |
摘要 |
An original document reading apparatus (1) includes a LED array (2b) having an alignment of a plurality of point light source elements (21) in a main scanning direction beneath an original document table (2a), a moving device (2i, 2j) that moves the LED array (2b) in a sub scanning direction, and a photo acceptance unit (2g) that accepts a light reflected from the original document (2k) and determines a size of the original document (2k) based upon a reaction' of a pixel to the light. The plurality of point light source elements are divided into a plurality of blocks (a to g) to be turned on and off in turn per a block starting from a block (d) corresponding to an original document minimum size to a block (g) corresponding to an original document maximum size. <IMAGE> |
申请公布号 |
EP1533660(A3) |
申请公布日期 |
2005.08.03 |
申请号 |
EP20040027473 |
申请日期 |
2004.11.19 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
KOHCHI, MASASHI;SAKURAI, YASUO |
分类号 |
G03B27/50;G03B27/62;G03G15/00;G06T1/00;H04N1/04 |
主分类号 |
G03B27/50 |
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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