Patent ID: 7049630

Claim:
An OLED device comprising: a substrate having an active region defined thereon, the active region comprising pixels, the substrate having a plurality of electrodes defined thereon that are confined to an electrode region, wherein the electrodes have a first length along a first direction parallel to a surface of the substrate and a first width along a second direction parallel to the surface of the substrate and perpendicular to the first direction, the first length being greater than the first width; and a plurality of pillars parallel to one another forming grooves between the pillars, wherein at least one of the grooves has an electrode from the plurality of electrodes located in the groove, the pillars have a second length and a second width, the second length being greater than the second width and extending along the first direction so that the plurality of pillars are parallel to the plurality of electrodes, the pillars having a profile where a pillar has a lower portion and an upper portion that is wider in the second direction than the lower portion, the plurality of pillars extending along the first direction past ends of the plurality of electrodes and outside the electrode region of the substrate to prevent electrical shorting.