Masks, method to inspect and adjust mask position, and method to pattern pixels of organic light-emitting display device utilizing the masks

An organic light-emitting display device comprising:

• a substrate comprising:
• an active area in a central portion;
• and
• a dummy area outside the active area;
• a first color emission layer on the substrate;
• a second color emission layer on the substrate, the second color emission layer being spaced apart from the first color emission layer by a determined pitch;
• a third color emission layer on the substrate, the third color emission layer being spaced apart from the first color emission layer and the second color emission layer;
• a first pattern for the first color emission layer arranged in the dummy area;
• and
• a second pattern for the second color emission layer arranged in the dummy area;
• wherein a pitch between the first pattern and the second pattern is substantially equal to the determined pitch.