Image reading device and image forming apparatus
申请(专利)号： US20030653887
专利号： US2004057087A1 主分类号： H04N1/04 申请权利人： WADA
SHINICHIROH 公开国代码： US 优先权国家： JP
摘 要：
An image reading device comprises a photoelectric conversion unit converting image data, optically read from a document, into an analog signal. A
reading optical unit irradiates light to the document and directs a reflected light from the document to the photoelectric conversion unit. An analog-signal
processing unit samples the analog signal and performs gain adjustment of the sampled analog signal in response to a control signal. An analog-to-digital conversion unit converts the analog signal, outputted by the analog-signal processing unit, based on a reference voltage to output a digital signal of the read data at an output level. A correction unit optimizes the output level of the read data signal for each of a first reading mode and a second reading mode by changing either the control signal to the analog-signal processing unit or the
reference voltage to the analog-to-digital conversion unit. 主权项：
申请日： 2003-09-04 公开公告日： 2004-03-25
分类号： H04N1/04 发明设计人： SHINICHIROH
WADA 申请国代码： US
优先权： 20020905 JP 2002-260232
摘 要 附 图：
1. An image reading device having a first reading mode and a second reading mode i
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Image reading device and image forming apparatus
