Display device and display module

Abstract

To provide a display device or the like that enables stable curing of a resin. The display device includes a first circuit and a second circuit over the same substrate. The first circuit has a function of performing display; the second circuit has a function of driving the first circuit; the second circuit includes a transistor and a capacitor; the transistor includes an oxide semiconductor layer over a first insulating layer; the capacitor includes a first conductive layer, a second insulating layer, and a second conductive layer; the first conductive layer is positioned over the first insulating layer; one of a source and a drain of the transistor is electrically connected to the second conductive layer; and the first conductive layer and the oxide semiconductor layer include the same metal element.

What is claimed is: 
     
         1 . A display device comprising:
 a pixel and a gate driver; and   an adhesive layer over the pixel and the gate driver,   wherein the gate driver includes a transistor whose channel region is formed in an oxide semiconductor layer, a first capacitor, and a second capacitor,   wherein the first capacitor includes a first conductive layer containing a same metal element as the oxide semiconductor layer, a first insulating layer, and a second conductive layer in contact with the adhesive layer, and   wherein the second capacitor includes the first conductive layer, a second insulating layer functioning as a gate insulating film of the transistor, and a third conductive layer formed on a same layer as a gate electrode of the transistor.   
     
     
         2 . The display device according to  claim 1 , wherein each of the first conductive layer, the second conductive layer and the third conductive layer has a light-transmitting property. 
     
     
         3 . The display device according to  claim 1 , wherein the first conductive layer has a region whose hydrogen concentration is higher than the oxide semiconductor layer. 
     
     
         4 . The display device according to  claim 1 , wherein the first insulating layer is silicon nitride. 
     
     
         5 . The display device according to  claim 1 , wherein the second capacitor is provided below the first capacitor. 
     
     
         6 . A display device comprising:
 a pixel and a gate driver; and   an adhesive layer over the pixel and the gate driver,   wherein the gate driver includes a transistor whose channel region is formed in an oxide semiconductor layer, a first capacitor, and a second capacitor,   wherein the first capacitor includes a first conductive layer containing a same metal element as the oxide semiconductor layer, a first insulating layer, and a second conductive layer in contact with the adhesive layer,   wherein the second capacitor includes the first conductive layer, a second insulating layer functioning as a gate insulating film of the transistor, and a third conductive layer formed on a same layer as a gate electrode of the transistor, and   wherein the third conductive layer is electrically connected to the second conductive layer.   
     
     
         7 . The display device according to  claim 6 , wherein each of the first conductive layer, the second conductive layer and the third conductive layer has a light-transmitting property. 
     
     
         8 . The display device according to  claim 6 , wherein the first conductive layer has a region whose hydrogen concentration is higher than the oxide semiconductor layer. 
     
     
         9 . The display device according to  claim 6 , wherein the first insulating layer is silicon nitride. 
     
     
         10 . The display device according to  claim 6 , wherein the second capacitor is provided below the first capacitor.