Patent ID: 8598590
Filing Date: 2013-12-03
Classification: H01L

Abstract:
1. An organic light emitting diode display device, comprising: at least one switching thin film transistor in a pixel region, the at least one switching thin film transistor including a switching semiconductor layer of polycrystalline silicon; at least one driving thin film transistor connected to the at least one switching thin film transistor, the at least one driving thin film transistor including a driving semiconductor layer of polycrystalline silicon layer; and a light emitting diode connected to the at least one driving thin film transistor, wherein each of the at least one switching semiconductor layer and the at least one driving semiconductor layer includes a plurality of grains, wherein each of the plurality of grains has a first width along a first direction and a second width along a second direction perpendicular to the first direction, and the first width is greater than the second width, and wherein a direction of a channel of the at least one switching thin film transistor is parallel to the first direction, and a direction of a channel of the at least one driving thin film transistor is perpendicular to the first direction.