Patent ID: 8895970

Claim:
An organic light-emitting display device comprising: available pixels disposed in a first arrangement for displaying an image by light emission; and dummy pixels disposed in a second arraignment different from the first arrangement around the available pixels for measuring characteristics of the available pixels, each dummy pixel comprising: an active layer comprised of polycrystalline silicon that is formed by patterning a semiconductor layer formed by laser crystallization, the active layer including a channel area and source and drain regions disposed on opposite sides of the channel area; a gate electrode that is disposed to correspond to the channel area of the active layer; a first insulating layer that is disposed between the active layer and the gate electrode; a second insulating layer that is disposed on the gate electrode; and a test element group pattern including at least first, second and third test patterns that are formed on the second insulating layer and contact the source region, the drain region and the gate electrode, respectively.