Active matrix substrate, electro-optical device, and electronic device

Abstract

An active matrix substrate is provided which does not cause reductions in the brightness of electroluminescence elements, and which comprises appropriate peripheral circuitry occupying a small area. The active matrix substrate comprises peripheral circuits to supply current to EL elements provided for each pixel, and corresponding to EL elements, and further comprises a holding element which holds a control voltage, a first active element connected to the holding element and which supplies current to a light-emitting portion based on a control voltage, and a second active element connected to the holding element and which controls the charging and discharging of the holding element. In particular, the second active element is configured as a multiple-control-terminal type active element. As a result, there are no fluctuations in the programmed current.

What is claimed is: 
     
         1 . An electro-optical device comprising:
 an electro-optical element;   a first transistor that has a source and a drain; and   a power supply line that is electrically connected to the electro-optical element and extends in a direction,   the power supply line being electrically connected to the source or the drain of the first transistor through a plurality of first contact holes,   the plurality of first contact holes being arranged along a line extending in the direction.   
     
     
         2 . An electro-optical device comprising:
 an electro-optical element;   a first transistor that has a source and a drain;   a second transistor that has a gate electrode; and   a power supply line that is electrically connected to the electro-optical element and extends in a direction,   the gate electrode of the second transistor being electrically connected to the source or the drain of the first transistor through a plurality of second contact holes,   the plurality of second contact holes arranged along a line extending in the direction.   
     
     
         3 . The electro-optical device according to  claim 1 , further comprising a second transistor having a gate electrode, the gate electrode of the second transistor being electrically connected to the source or the drain of the first transistor through a plurality of second contact holes. 
     
     
         4 . The electro-optical device according to  claim 2 ,
 the power supply line being electrically connected to the source or the drain of the first transistor through a plurality of first contact holes.   
     
     
         5 . The electro-optical device according to  claim 1 , further comprising a data line extending in the direction. 
     
     
         6 . The electro-optical device according to  claim 2 , further comprising a data line extending in the direction. 
     
     
         7 . An electronic device, comprising:
 the electro-optical device as set forth in  claim 1 .