IMAGE SENSOR UNIT AND AN IMAGE READING APPARATUS CAPABLE OF OBTAINING IMAGE DATA WITHOUT GENERATING CHANGE OF IMAGE DATA

摘要

PURPOSE: An image sensor unit and an image reading apparatus are provided to perform illumination correction in case a temperature shift is generated in a light emitting wavelength of an LED(Light Emitting Diode).;CONSTITUTION: A white reference data generating circuit(C) generates white reference data for indicating reference illumination of white. A correction data generating circuit(D) generates correction data based on white standard data. The correction data indicates reference illumination of white. A comparison circuit(E) calculates a correction coefficient from the correction data.;COPYRIGHT KIPO 2012