A passive electroluminescent display panel comprising: a substrate having an emissive area and a non-emissive area around the emissive area; a plurality of sub-panels arranged in a column direction and a row direction of the emissive area of the substrate, each sub-panel having a plurality of emitting pixel regions; a first electrode formed at the plurality of emitting pixel regions in each sub-panel and divided from the first electrodes of adjacent sub-panels; an organic light emitting layer on the first electrode; a second electrode on the organic light emitting layer; first and second pads (5,6) arranged in the non-emissive area of the substrate; a first bus electrode (7-b) electrically coupled to the first pad and the first electrode of each sub-panel so as to electrically drive each sub-panel separately; the first bus electrode (7-b) extending along a first direction; a first insulating buffer layer formed on the first bus electrode and extending along a second direction orthogonal to the first direction; and a second bus electrode (10-b) formed along the second direction on top of the first insulating buffer layer, the second bus electrode being electrically coupled to the second pad and by a protrusion (10-b') to the second electrode of each sub-panel so as to electrically drive each sub-panel separately, wherein a plurality of notches are formed on one side of the first electrode, the first electrode having a rectangular shape, the protrusion (10-b') of then second bus electrode (10-b) extending into an area defined by a corresponding notch of said plurality of notches, a second insulating layer formed on top of the second bus electrode (10-b) along said second direction, the second insulating layer leaving exposed the second bus electrode at the notch (10-b'); wherein the area defined by the corresponding notch is exposed by etching the organic light emitting layer deposited on top of the second bus electrode (10-b) so that the second electrode is coupled to the second bus electrode (10-b) by said protrusion. a substrate having an emissive area and a non-emissive area around the emissive area; a plurality of sub-panels arranged in a column direction and a row direction of the emissive area of the substrate, each sub-panel having a plurality of emitting pixel regions; a first electrode formed at the plurality of emitting pixel regions in each sub-panel and divided from the first electrodes of adjacent sub-panels; an organic light emitting layer on the first electrode; a second electrode on the organic light emitting layer; first and second pads (5,6) arranged in the non-emissive area of the substrate; a first bus electrode (7-b) electrically coupled to the first pad and the first electrode of each sub-panel so as to electrically drive each sub-panel separately; the first bus electrode (7-b) extending along a first direction; a first insulating buffer layer formed on the first bus electrode and extending along a second direction orthogonal to the first direction; and a second bus electrode (10-b) formed along the second direction on top of the first insulating buffer layer, the second bus electrode being electrically coupled to the second pad and by a protrusion (10-b') to the second electrode of each sub-panel so as to electrically drive each sub-panel separately, wherein a plurality of notches are formed on one side of the first electrode, the first electrode having a rectangular shape, the protrusion (10-b') of then second bus electrode (10-b) extending into an area defined by a corresponding notch of said plurality of notches, a second insulating layer formed on top of the second bus electrode (10-b) along said second direction, the second insulating layer leaving exposed the second bus electrode at the notch (10-b'); wherein the area defined by the corresponding notch is exposed by etching the organic light emitting layer deposited on top of the second bus electrode (10-b) so that the second electrode is coupled to the second bus electrode (10-b) by said protrusion.