Display device including an organic el device

Abstract

A self-luminescence display device, in which dispersion in display among a plurality of pixels, caused by dispersion in characteristics among drive thin-film transistors, is decreased and uniform display free of unevenness can be obtained. The device includes a plurality of pixels having current drive type luminescent elements, and parallel-connected n (n≧2) thin-film transistors to feed a drive current to the respective current drive type luminescent elements. The transistors are arranged in different pixels, respectively, for example, in a first region of pixels adjacent to one another along a first direction. A second region of dummy pixels can be provided on at least one side of said first region along said first direction.

1 . A display device comprising:
 a first line;   an organic EL device;   a transistor for controlling current between the first line and the organic EL device,   a second line; and   a capacitor arranged between the second line and a gate of the transistor;   the organic EL device comprising a first electrode, an organic EL layer and a second electrode;   wherein the transistor is covered by a first insulating layer,   wherein the transistor is connected to a connecting line via a first contact hole in the first insulating layer, the connecting line comprising three metal layers, wherein the connecting line is covered by a second insulating layer, and wherein the connecting line is connected to the first electrode via a second contact hole in the second insulating layer,   wherein the first contact hole is deviated from the second contact hole,   wherein the first contact hole, the second contact hole and the connecting line are covered by a third insulating layer, wherein the third insulating layer is arranged on the first electrode, and wherein the third insulating layer includes an aperture on the first electrode, and   wherein the organic EL device is arranged in the aperture.   
   
   
       2 . The display device according to  claim 1 ,
 the connecting line comprising a first layer, a second layer and a third layer,   the second layer comprising Al, and   the first layer and the layer comprising Mo.   
   
   
       3 . The display device according to  claim 2 ,
 the first line comprising the same layers as the connecting line.   
   
   
       4 . The display device according to  claim 2 ,
 the second line comprising the same layers as the connecting line.   
   
   
       5 . The display device according to  claim 3 ,
 wherein the first line, the second line and the connecting line are arranged on the same layer.   
   
   
       6 . A display device comprising:
 a first line;   an organic EL device;   a transistor controlling current between the first line and the organic EL device;   a second line; and   a capacitor connected between the second line and the transistor;   an organic EL device comprising a first electrode, an organic EL layer and a second electrode;   wherein the transistor is covered by a first insulating layer,   wherein a current is supplied from the transistor to the first electrode via a first contact hole in the first insulating layer,   wherein an outer edge of the first electrode is covered by a second insulating layer including an aperture exposing the first electrode,   wherein the first line is arranged under the first electrode covered by the second insulating layer,   wherein a reflective layer is arranged under the first electrode, an outer edge of the reflective layer is covered by the second insulating layer, and the reflective layer is smaller than the first electrode and larger than the aperture of the second insulating layer.   
   
   
       7 . The display device according to  claim 6 ,
 wherein a gap is arranged between the reflective layer and the first line.