PIXEL CIRCUIT, DISPLAY APPARATUS AND DRIVE METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a pixel circuit which compensates change with time of a drain current in a drive transistor.

SOLUTION: A sampling transistor Tr1 samples an input signal Vsig and holds in a holding capacitance C1. A drive transistor Tr2 supplies a drive current Ids to a light emitting element EL in accordance with the signal voltage held by the holding capacitance C1. A compensation circuit 7 includes means so as to detect a decrease in the drive current Ids through the output node B side and to feedback the detection result to the input node A side as follows: a detecting means which has a resistance component inserted between an output node B and a ground potential Vss and a capacitance component to hold a voltage drop as a detected potential induced in the resistance component by the drive current Ids passing from the output node B to the ground potential Vss; and a feedback means which compares the level of the input signal Vsig with the level of the detected potential to obtain a difference and adds the a potential in accordance with the difference to the signal potential held in the holding capacitance C1.

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