Large area organic light emitting diode display

摘要

A large area organic light emitting diode display is provided. The organic light emitting diode display comprises a substrate including a display area defining a plurality of pixel areas in a matrix manner and a non-display area surrounding the display area; a thin film transistor disposed in each pixel area; an auxiliary cathode electrode disposed at the same layer with an element of the thin film transistor; a planar layer on the thin film transistor and the auxiliary cathode electrode; an anode electrode connected to the thin film transistor and disposed in each pixel area on the planar layer; an organic light emission layer disposed on the anode electrode; a cathode electrode covering the whole surface of the display area on the organic light emission layer; and a protective electrode covering the auxiliary cathode electrode exposed through a cathode contact hole and contacting the cathode electrode.

主权项

1. An organic light emitting diode display, comprising:
a substrate including a display area defining a plurality of pixel areas in a matrix manner and a non-display area surrounding the display area; a thin film transistor disposed in each pixel area; an auxiliary cathode electrode disposed at the same layer with an element of the thin film transistor, and covering the display area and the non-display area; a planar layer on the thin film transistor and the auxiliary cathode electrode; an anode electrode connected to the thin film transistor and disposed in each pixel area on the planar layer; an organic light emission layer disposed on the anode electrode; a cathode electrode covering the whole surface of the display area on the organic light emission layer; a protective electrode covering the auxiliary cathode electrode exposed through a cathode contact hole and contacting the cathode electrode, wherein the cathode contact hole includes a first cathode contact hole exposing some portions of the auxiliary cathode electrode disposed in the non-display area, and a second cathode contact hole exposing some portions of the auxiliary cathode electrode disposed in the display area; wherein the organic light emission layer and the cathode electrode are stacked on the protective electrode covering the auxiliary cathode electrode exposed by the second cathode contact hole; and wherein the protective electrode covers an exposed surface of the auxiliary cathode electrode through the first and the second cathode contact holes; and a welding point electrically connecting the protective electrode, the cathode electrode, and the auxiliary cathode electrode at the second cathode contact hole.