Refreshment Drive manner of photosensor circuit, two dimensional coordinate detection device, information processing equipment and photosensor component

摘要

As for the photosensor circuit which relates to this invention, when the coordinate detection field which light passes from the illuminant (3) the pointer (P) being put in (2), with the change of the light income, in the coordinate detection field (2) the pointer (P) position coordinate is detected. The photosensor component where the light income is many the illuminant (3) with the physical relationship (41) as for the 1st photosensor circuit which it has, although the photosensor component (41) the refreshment signal which initializes the threshold level property which decides light absorbent sensitivity (shield_A) 1st wiring which is supplied is had the photosensor component where the light income is little (42) as for the 2nd photosensor circuit which it has, the photosensor component (42) the refreshment signal which initializes threshold level property (shield_B) becoming independent, the refreshment signal (shield_A) with 2nd wiring which is supplied is had.