ELECTRO-OPTICAL DEVICE, SEMICONDUCTOR DEVICE, DISPLAY DEVICE AND ELECTRONIC EQUIPMENT HAVING THE SAME

摘要

PROBLEM TO BE SOLVED: To effectively eliminate a thermal current in a photosensor as well as to increase durability against electromagnetic noise.

SOLUTION: The electro-optical device includes: a light-receiving sensor 350P irradiated with external light; a light-shielded sensor 350D shielded from external light; a backlight light-shielding electrode 611P configured to overlap the light-receiving sensor 350P in a plane view; a backlight light-shielding electrode 611D configured to overlap the light-shielded sensor 350D in a plane view; and a self-correcting voltage circuit 361 applying a potential to each backlight light-shielding electrode, at the potential where the photocurrent of the light-receiving sensor and the light-shielded sensor reaches almost the maximum. The two photosensors are laid in series as above described, with one of them being shielded from external light. In this configuration, different potentials are applied to the backlight light-shielding electrodes that cover the respective two photosensors to optimize the photocurrents.

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