Patent ID: 7885778
Filing Date: 2011-02-08
Classification: G01J,G02F,G09G

Abstract:
1. An optical detection device comprising: an optical sensing section that has an optical detection transistor and outputs a signal corresponding to the amount of light irradiated to the optical detection transistor; a threshold voltage detecting section that has a threshold value detection transistor that is provided adjacent to the optical detection transistor and is formed in the same process as the formation process of the optical detection transistor, the threshold voltage detecting section detecting the threshold voltage of the threshold value detection transistor; a sensor output value generating section that generates a sensor output value that relates to the amount of irradiating light on the basis of the signal outputted from the optical sensing section; a correction coefficient determining section that determines a correction coefficient that is used for correcting a change in the sensor output value that is caused by the optical degradation of the optical detection transistor and corresponds to the threshold voltage detected at the threshold voltage detecting section on the basis of a relationship between the correction coefficient and the threshold voltage, the relationship between the correction coefficient and the threshold voltage being predetermined on the basis of a correlation between a change in a sensor output value relative to the degree of the optical degradation of the optical detection transistor and a change in the threshold voltage relative to the degree of the optical degradation of the optical detection transistor; and a correction processing section that corrects the sensor output value on the basis of the correction coefficient that has been determined at the correction coefficient determining section.