Display Device

Abstract

A display device includes: a substrate; a light emitting diode disposed above the substrate; a first transistor disposed above the substrate; and a second transistor disposed above the substrate. The first transistor includes: a first semiconductor including an oxide semiconductor; a first top gate electrode disposed above the first semiconductor; and a first drain electrode electrically connected to the first semiconductor, wherein the first drain electrode is electrically connected to the light emitting diode. The second transistor includes: a second semiconductor including a silicon semiconductor; two second top gate electrodes disposed above the second semiconductor; two second bottom gate electrodes disposed between the second semiconductor and the substrate; and a second drain electrode electrically connected to the second semiconductor, wherein the second drain electrode is electrically connected to the first top gate electrode of the first transistor.

What is claimed is: 
     
         1 . A display device, comprising:
 a substrate;   a light emitting diode disposed above the substrate;   a first transistor disposed above the substrate and comprising:
 a first semiconductor including an oxide semiconductor; 
 a first top gate electrode disposed above the first semiconductor; and 
 a first drain electrode electrically connected to the first semiconductor, wherein the first drain electrode is electrically connected to the light emitting diode; and 
   a second transistor disposed above the substrate and comprising:
 a second semiconductor including a silicon semiconductor; 
 two second top gate electrodes disposed above the second semiconductor; 
 two second bottom gate electrodes disposed between the second semiconductor and the substrate; and 
 a second drain electrode electrically connected to the second semiconductor, wherein the second drain electrode is electrically connected to the first top gate electrode of the first transistor. 
   
     
     
         2 . The display device of  claim 1 , wherein the second drain electrode is electrically connected to the first top gate electrode of the first transistor via a metal bridge. 
     
     
         3 . The display device of  claim 1 , wherein the first transistor further comprises a first bottom gate electrode disposed under the first semiconductor. 
     
     
         4 . The display device of  claim 3 , wherein the first bottom gate electrode of the first transistor is a first light shielding element. 
     
     
         5 . The display device of  claim 1 , wherein at least one of the second bottom gate electrodes of the second transistor is a second light shielding element. 
     
     
         6 . The display device of  claim 1 , wherein the display device comprises a capacitor electrically connected to the first transistor and the light emitting diode. 
     
     
         7 . The display device of  claim 6 , wherein the capacitor has two capacitor electrodes, and one of the capacitor electrodes is made of the same material of the oxide semiconductor. 
     
     
         8 . The display device of  claim 7 , wherein the other of the capacitor electrodes comprises a metal. 
     
     
         9 . The display device of  claim 1 , wherein at least one of the second bottom gate electrodes comprises a metal.