Method for driving semiconductor device

摘要

To provide a method for driving a semiconductor device, by which influence of variation in threshold voltage and mobility of transistors can be reduced. The semiconductor device includes an n-channel transistor, a switch for controlling electrical connection between a gate and a first terminal of the transistor, a capacitor electrically connected between the gate and a second terminal of the transistor, and a display element. The method has a first period for holding the sum of a voltage corresponding to the threshold voltage of the transistor and an image signal voltage in the capacitor; a second period for turning on the switch so that electric charge held in the capacitor in accordance with the sum of the image signal voltage and the threshold voltage is discharged through the transistor; and a third period for supplying a current to the display element through the transistor after the second period.

主权项

1. A method for driving a semiconductor device, the semiconductor device comprising:
a transistor with n-type conductivity; a wiring; a first switch configured to control a conduction state between a gate of the transistor and a first terminal of the transistor; a second switch configured to control a conduction state between the first terminal of the transistor and the wiring; a capacitor electrically connected between the gate of the transistor and a second terminal of the transistor; and a display element, wherein the method for driving the semiconductor device includes:
in a first period, holding a sum of a voltage corresponding to a threshold voltage of the transistor and an image signal voltage in the capacitor,in a second period, turning on the first switch so that electric charge held in the capacitor in accordance with the sum of the image signal voltage and the threshold voltage is discharged through the transistor, and turning off the second switch so that the first terminal of the transistor and the wiring are in a non-conduction state with each other, andin a third period, turning on the second switch and supplying a current from the wiring to the display element through the second switch and the transistor after the second period.