发明名称 |
IMAGE READER DEVICE AND METHOD FOR DRIVING SAME |
摘要 |
<p>The present invention provides an image reader apparatus capable of obtaining an image having stable brightness while suppressing an increase of the cost of the apparatus. The image reader apparatus 1 for reading an image on a document 2 being fed and outputting an image signal includes a synchronization signal generation circuit 4 for generating a synchronization signal SS synchronous with a feed timing and a feed cycle of the document 2, a CCD 6 for reading an image on the document 2 in synchronism with the synchronization signal SS, an LED 9 for emitting white light, and a lighting control circuit 7 for turning the LED 9 on in synchronism with the synchronization signal SS and turning the light source off so that a lighting period is equalized for each line irrespective of a variation of the feed cycle of the document 2. The lighting control circuit 7 turns the LED 9 off so that the lighting period of the LED 9 is equal to a predetermined preset period.</p> |
申请公布号 |
EP2383972(A4) |
申请公布日期 |
2012.08.15 |
申请号 |
EP20090837610 |
申请日期 |
2009.12.22 |
申请人 |
NEC ENGINEERING, LTD. |
发明人 |
OKADA, KOUJI;YAMAMOTO, TETSUICHIRO;HOSHIMIYA, HIROSHI |
分类号 |
H04N1/04;G03B27/54;G06T1/00;H04N1/028;H04N1/03 |
主分类号 |
H04N1/04 |
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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