Auxiliary Lines Reducing Resistance In A Cathode Of An Organic Light Emitting Display Device

摘要

An organic light emitting diode (OLED) display device is described that includes a shared cathode between OLED pixels as well as auxiliary lines that are formed between rows and/or columns of the OLED pixels. As the cathode is shared between many if not all of the pixels of display device, resistance within the cathode can affect the brightness of those pixels that are further from the cathode's voltage source. The auxiliary lines serve to counteract the voltage drop caused by this resistance. The auxiliary lines are electrically connected to the cathode in close proximity to individual pixels of the display.

主权项

1. A display device comprising:
a pixel area comprising:
a pacification layer;an anode electrically coupled to a source or a drain of a thin film transistor though the pacification layer;an organic light-emitting layer formed on the anode;a cathode formed on the organic light-emitting layer; and a contact area comprising:
an auxiliary contact hole formed in the pacification layer, the auxiliary contact hole having an inverse tapered shape;an auxiliary line having a first portion formed over the pacification layer and a second portion formed in the auxiliary contact hole;a portion of the cathode physically contacting the second portion of the auxiliary line within the auxiliary contact hole.