Electronic device, display device, and semiconductor device and method for driving the same

Abstract

A pixel having a transistor which controls a current value supplied to a load, a first storage capacitor, a second storage capacitor, and first to fourth switches is included. After the threshold voltage of the transistor is held in the second storage capacitor, a potential in accordance with a video signal is input to the pixel. Voltage obtained by adding a potential in which the potential in accordance with the video signal and the first storage capacitor are capacitively divided to the threshold voltage is held in the second storage capacitor in this manner, so that variation of a current value caused by variations in the threshold voltage of the transistor is suppressed. Thus, desired current can be supplied to the load such as a light-emitting element. In addition, a display device with little deviation from luminance specified by the video signal can be provided.

1 . (canceled) 
     
     
         2 . A display device comprising:
 a transistor;   a first switch;   a second switch;   a third switch;   a fourth switch;   a first capacitor;   a light-emitting element; and   a wiring,   wherein a first terminal of the first switch is electrically connected to the light-emitting element,   wherein a second terminal of the first switch is electrically connected to one of a source and a drain of the transistor,   wherein the other of the source and the drain of the transistor is electrically connected to a first terminal of the second switch,   wherein the other of the source and the drain of the transistor is electrically connected to a first terminal of the third switch,   wherein a gate of the transistor is electrically connected to a second terminal of the third switch,   wherein the gate of the transistor is electrically connected to a first terminal of the first capacitor,   wherein a second terminal of the first capacitor is electrically connected to a first terminal of the fourth switch,   wherein the third switch is configured such that switching between an on-state and an off-state of the third switch are controlled by a signal input to the wiring, and   wherein the fourth switch is configured such that switching between an on-state and an off-state of the fourth switch is controlled by the signal input to the wiring.   
     
     
         3 . The display device according to  claim 2 , further comprising a fifth transistor electrically connected to the second terminal of the first capacitor. 
     
     
         4 . The display device according to  claim 2 , further comprising a second capacitor electrically connected to the first terminal of the first capacitor. 
     
     
         5 . A display device comprising:
 a transistor;   a first switch;   a second switch;   a third switch;   a fourth switch;   a first capacitor;   a light-emitting element; and   a wiring,   wherein a first terminal of the first switch is electrically connected to the light-emitting element,   wherein a second terminal of the first switch is electrically connected to one of a source and a drain of the transistor,   wherein the other of the source and the drain of the transistor is electrically connected to a first terminal of the second switch,   wherein the other of the source and the drain of the transistor is electrically connected to a first terminal of the third switch,   wherein a gate of the transistor is electrically connected to a second terminal of the third switch,   wherein the gate of the transistor is electrically connected to a first terminal of the first capacitor,   wherein a second terminal of the second switch is electrically connected to a power supply line,   wherein a second terminal of the first capacitor is electrically connected to a first terminal of the fourth switch,   wherein a second terminal of the fourth switch is electrically connected to a potential supply line,   wherein the third switch is configured such that switching between an on-state and an off-state of the third switch are controlled by a signal input to the wiring, and   wherein the fourth switch is configured such that switching between an on-state and an off-state of the fourth switch is controlled by the signal input to the wiring.   
     
     
         6 . The display device according to  claim 5 , further comprising a fifth transistor electrically connected to the second terminal of the first capacitor. 
     
     
         7 . The display device according to  claim 5 , further comprising a second capacitor electrically connected to the first terminal of the first capacitor. 
     
     
         8 . A display device comprising:
 a pixel comprising:
 a transistor; 
 a first switch; 
 a second switch; 
 a third switch; 
 a fourth switch; 
 a first capacitor; and 
 a light-emitting element; 
   a wiring; and   a power supply line,   wherein a first terminal of the first switch is electrically connected to the light-emitting element,   wherein a second terminal of the first switch is electrically connected to one of a source and a drain of the transistor,   wherein the other of the source and the drain of the transistor is electrically connected to a first terminal of the second switch,   wherein the other of the source and the drain of the transistor is electrically connected to a first terminal of the third switch,   wherein a gate of the transistor is electrically connected to a second terminal of the third switch,   wherein the gate of the transistor is electrically connected to a first terminal of the first capacitor,   wherein a second terminal of the second switch is electrically connected to the power supply line,   wherein a second terminal of the first capacitor is electrically connected to a first terminal of the fourth switch,   wherein the third switch is configured such that switching between an on-state and an off-state of the third switch are controlled by a signal input to the wiring, and   wherein the fourth switch is configured such that switching between an on-state and an off-state of the fourth switch is controlled by the signal input to the wiring.   
     
     
         9 . The display device according to  claim 8 , further comprising a fifth transistor electrically connected to the second terminal of the first capacitor. 
     
     
         10 . The display device according to  claim 8 , further comprising a second capacitor electrically connected to the first terminal of the first capacitor.