Display Device and Manufacturing Method Thereof

Abstract

A display device in which light leakage in a monitor element portion is prevented without increasing the number of steps and cost is provided. The display device includes a monitor element for suppressing influence on a light-emitting element due to temperature change and change over time and a TFT for driving the monitor element, in which the TFT for driving the monitor element is provided so as not to overlap the monitor element. Furthermore, the display device includes a first light shielding film and a second light shielding film, in which the first light shielding film is provided so as to overlap a first electrode of the monitor element and the second light shielding film is electrically connect to the first light shielding film through a contact hole formed in an interlayer insulating film. The contact hole is formed so as to surround the outer edge of the first electrode of the monitor element.

What is claimed is: 
     
         1 . (canceled) 
     
     
         2 . A display device comprising:
 a gate line;   a pixel portion comprising a plurality of pixels; and   a region outside of the pixel portion, the region comprising:
 a first conductive film over a substrate, the first conductive film comprising a same material as the gate line; 
 an insulating film over the first conductive film; and 
 a second conductive film over the insulating film, the second conductive film overlapping the first conductive film, 
   wherein each of the plurality of pixels comprises a first light-emitting element having a bottom emission structure.   
     
     
         3 . The display device according to  claim 2 , wherein the region comprises a second light-emitting element. 
     
     
         4 . The display device according to  claim 2 , wherein the first conductive film is a light shielding film. 
     
     
         5 . The display device according to  claim 2 , wherein the second conductive film is a light shielding film. 
     
     
         6 . A display device comprising:
 a gate line;   a pixel portion comprising a plurality of pixels; and   a region outside of the pixel portion, the region comprising:
 a first conductive film over a substrate, the first conductive film comprising a same material as the gate line; 
 an insulating film over the first conductive film; and 
 a second conductive film over the insulating film, the second conductive film overlapping the first conductive film, 
   wherein the second conductive film overlaps the gate line, and   wherein each of the plurality of pixels comprises a first light-emitting element having a bottom emission structure.   
     
     
         7 . The display device according to  claim 6 , wherein the region comprises a second light-emitting element. 
     
     
         8 . The display device according to  claim 6 , wherein the first conductive film is a light shielding film. 
     
     
         9 . The display device according to  claim 6 , wherein the second conductive film is a light shielding film. 
     
     
         10 . A display device comprising:
 a gate line;   a pixel portion comprising a plurality of pixels; and   a region outside of the pixel portion, the region comprising:
 a first conductive film over a substrate; 
 an insulating film over the first conductive film; and 
 a second conductive film over the insulating film, the second conductive film overlapping the first conductive film, 
   wherein each of the gate line and the first conductive film comprises molybdenum,   wherein the second conductive film comprises molybdenum,   wherein the second conductive film overlaps the gate line,   wherein each of the plurality of pixels comprises a first light-emitting element,   wherein the first light-emitting element comprises a first electrode, an electroluminescent layer over the first electrode and a second electrode over the electroluminescent layer,   wherein the first electrode comprises indium tin oxide, and   wherein the second electrode comprises aluminum.   
     
     
         11 . The display device according to  claim 10 , wherein the region comprises a second light-emitting element. 
     
     
         12 . The display device according to  claim 10 , wherein the first conductive film is a light shielding film. 
     
     
         13 . The display device according to  claim 10 , wherein the second conductive film is a light shielding film