Patent ID: 11910692
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A display device comprising:
a substrate including a display area and a test area adjacent to the display area;
a lower electrode disposed in the display area on the substrate;
a light emitting layer disposed on the lower electrode;
a common layer disposed on the light emitting layer;
an upper electrode disposed on the common layer; and
a test element group including:
a plurality of electrode patterns disposed in a same layer as the lower electrode and in the test area on the substrate;
a test common layer disposed in a same layer as the common layer and on the plurality of electrode patterns, wherein a plurality of openings is defined through the test common layer to expose a part of each of the plurality of electrode patterns; and
an electrode layer disposed in a same layer as the upper electrode, on the test common layer, and in contact with the plurality of electrode patterns through the plurality of openings.