Patent ID: 8044578
Filing Date: 2011-10-25
Classification: H01L

Abstract:
1. A display device, comprising: a first substrate including an organic electroluminescence diode device; a second substrate facing the first substrate and including a thin film transistor; a connection electrode configured to electrically connect the thin film transistor and the organic electroluminescence diode device, wherein the organic electroluminescence diode device comprises a first electrode and a second electrode separated by an organic luminescent layer; a first buffer pattern configured to separate two adjacent pixel regions; a second buffer pattern overlying the first buffer pattern and having a predetermined shape; a auxiliary electrode disposed between the first substrate and the first electrode of the organic electroluminescence device in the first buffer pattern; a separation portion where the first electrode and the second electrode are further separated by the first and the second buffer patterns, wherein the separation portion is located on the second electrode such that the separation portion is overlapped with the first and the second buffer patterns; and a spacer disposed on between the second electrode and the a drain electrode of the thin film transistor, wherein the spacer and the second buffer pattern face each other; wherein the first buffer pattern is etched to produce a cavity disposed between the two adjacent pixel regions and the cavity can be enlarged to the extent that the shape of the second buffer pattern is maintained, and wherein a surface of the spacer is covered by a connection electrode, wherein the connection electrode is directly contacted to the drain electrode, wherein the drain electrode and the second electrode facing the second buffer pattern are connected by the connection electrode, wherein the second buffer pattern extends from an emitting area of the pixel region farther than the first buffer pattern and the cavity is formed where the second buffer pattern is extended farther from the emitting area of the pixel region than the first buffer pattern, wherein the spacer is disposed on an extended region of the second buffer that is not overlapped with the first buffer pattern, wherein the extended region of the second buffer pattern does not overlap with the cavity.