Patent ID: 7947979
Filing Date: 2011-05-24
Classification: H01L

Abstract:
1. A display device comprising: a substrate including a first vapor deposition region and a second vapor deposition region inside the first vapor deposition region, wherein the second vapor deposition region has at least four corners; a pixel including a first thin film transistor, and provided in the second vapor deposition region; at least four test element groups each including a second thin film transistor, each of the at least four test element groups provided adjacent to each of the at least four corners, and provided outside the second vapor deposition region and inside the first vapor deposition region; and a second substrate overlapping with the first vapor deposition region, wherein a source, a drain and a gate of the second thin film transistor are electrically connected to a first terminal, a second teiminal and a third terminal, respectively, wherein one of the source and the drain is further electrically connected to a fourth terminal, and wherein the first terminal, the second terminal, the third terminal and the fourth terminal are provided in a region which does not overlap with the second substrate.