PIXEL CIRCUIT, IMAGE DISPLAY DEVICE AND ITS DRIVING METHOD

摘要

PROBLEM TO BE SOLVED: To eliminate a decrease in luminance by optimizing threshold voltage correcting operation on pixels.

SOLUTION: A switching transistor Tr3 turns on according to a control signal AZ1 supplied from a scan line AZ1 prior to a sampling period to charge the source S of a drive transistor Trd to a potential Vini. A switching transistor Tr2 turns on according to a control signal AZ2 supplied from a scan line AZ2 to set the gate G of the drive transistor Trd to a potential Vofs. A switching transistor Tr4 turns on according to a control signal DS supplied from a scan line DS to connect the drive transistor Trd to a potential Vcc and make a holding capacitor Cs hold a voltage corresponding to the threshold voltage Vth of the drive transistor Trd, thereby correcting an influence of the threshold voltage Vth. The reference potential of a scan line WS connected to the gate of an input transistor Tr1 is adjusted so that no leak current may flow through the input transistor Tr1 which should be in an off state.

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