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专利名称：OPTICAL DETECTION DEVICE, ELECTRO-OPTICAL DEVICE, ELECTRONIC APPARATUS,AND OPTICAL DEGRADATION CORRECTIONMETHOD
发明人：Yukiya Hirabayashi,Takashi Kunimori申请号：US12395772申请日：20090302
公开号：US20090248344A1公开日：20091001
专利附图：
摘要：An optical detection device includes: an optical sensing unit that has an optical
detection transistor and outputs a signal corresponding to the amount of light irradiatedto the optical detection transistor; a threshold voltage detecting unit that has athreshold value detection transistor that is provided adjacent to the optical detectiontransistor and is formed in the same process as the formation process of the opticaldetection transistor, the threshold voltage detecting unit detecting the thresholdvoltage of the threshold value detection transistor; a sensor output value generating unitthat generates a sensor output value that relates to the amount of irradiating light onthe basis of the signal outputted from the optical sensing unit; a correction coefficientdetermining unit that determines a correction coefficient that is used for correcting achange in the sensor output value that is caused by the optical degradation of the opticaldetection transistor and corresponds to the threshold voltage detected at the thresholdvoltage detecting unit on the basis of a relationship between the correction coefficientand the threshold voltage, the relationship between the correction coefficient and thethreshold voltage being predetermined on the basis of a correlation between a change ina sensor output value relative to the degree of the optical degradation of the opticaldetection transistor and a change in the threshold voltage relative to the degree of theoptical degradation of the optical detection transistor; and a correction processing unitthat corrects the sensor output value on the basis of the correction coefficient that hasbeen determined at the correction coefficient determining unit.
申请人：Yukiya Hirabayashi,Takashi Kunimori
地址：Suwa JP,Tottori JP
国籍：JP,JP
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