Display device having a semiconductor layer structure including a third portion extending in a third direction directly connecting to a first portion and a second portion that extend in different directions
An organic light-emitting diode display is disclosed. In one aspect, a semiconductor layer is on a substrate, and the semiconductor layer is non-linear. A gate metal line is on the semiconductor layer, and an insulating layer covering the semiconductor layer and the gate metal line and having a plurality of contact holes connected to the semiconductor layer. A data metal line is on the insulating layer and electrically connected to the semiconductor layer via a selected one of the contact holes. An OLED is electrically connected to the gate metal line and the data metal line, and the semiconductor layer includes a narrow semiconductor layer having a first width and an expansion semiconductor layer formed adjacent to the selected contact hole and having a second width greater than the first width.
1 . A display device, comprising:
a substrate;
a first transistor on the substrate and including a first semiconductor portion, the first semiconductor portion including a source region, a channel region, and a drain region sequentially arranged in a first direction;
a second transistor on the substrate and including a second semiconductor portion, the second semiconductor portion including a source region, a channel region, and a drain region sequentially arranged in a second direction crossing the first direction;
a third semiconductor portion on the substrate and between the first semiconductor portion and the second semiconductor portion, the third semiconductor portion being directly connected to the first semiconductor portion and the second semiconductor portion;
an insulating layer on the first semiconductor portion, the second semiconductor portion, and the third semiconductor portion, the insulating layer defining a first contact hole overlapping the third semiconductor portion; and
a connector on the insulating layer and electrically connected to the third semiconductor portion via the first contact hole,
wherein the first semiconductor portion extends horizontally and the second semiconductor portion extends vertically,
wherein the third semiconductor portion directly connects the horizontal first semiconductor portion to the vertical second semiconductor portion and extends in an oblique direction therebetween, with respect to the horizontal and vertical directions, and
wherein the third semiconductor portion has a maximum width measured in a direction perpendicular to the oblique direction, wherein the first contact hole overlaps a portion of the third semiconductor portion that has the maximum width, and wherein the maximum width of the third semiconductor portion is greater than a maximum width of the first semiconductor portion that is measured in the vertical direction.
2 . The display device of claim 1 , wherein a width of the first semiconductor portion, measured in the vertical direction, is constant along the horizontal direction, and
wherein a width of the second semiconductor portion, measured in the horizontal direction, is constant along the vertical direction.
3 . The display device of claim 2 , wherein the maximum width of the third semiconductor portion, measured in the direction perpendicular to the oblique direction, is greater than the width of the second semiconductor portion, measured in the horizontal direction.
4 . The display device of claim 1 , wherein the third semiconductor portion has a first side extending exclusively in the oblique direction and a second side, opposite to the first side, that includes:
a first part extending in the horizontal direction and directly connected to the first semiconductor portion;
a second part extending in the vertical direction and directly connected to the first part; and
a third part extending in the oblique direction and directly connected to the second part and the second semiconductor portion.
5 . The display device of claim 1 , further comprising:
a driving transistor on the substrate and including a gate electrode between the substrate and the insulating layer,
wherein the insulating layer further defines a second contact hole overlapping the gate electrode of the driving transistor, and
wherein the connector is electrically connected to the gate electrode of the driving transistor via the second contact hole.
6 . The display device of claim 5 , further comprising:
a first scan line between the substrate and the insulating layer and transmitting a first scan signal;
a data line on the insulating layer and transmitting a data signal; and
a third transistor electrically connected to the first scan line, the data line, and the driving transistor.
7 . The display device of claim 6 , wherein the first scan line extends in the first direction, and the data line extends in the second direction.
8 . The display device of claim 6 , wherein a gate electrode of the first transistor is electrically connected to the first scan line.
9 . The display device of claim 6 , wherein the source region of the first semiconductor portion is electrically connected to a drain region of a semiconductor portion of the driving transistor, and
wherein the drain region of the second semiconductor portion is electrically connected to the gate electrode of the driving transistor and the drain region of the first semiconductor portion.
10 . The display device of claim 5 , further comprising:
an initialization voltage line on the insulating layer, transmitting an initialization voltage, and electrically connected to the source region of the second semiconductor portion.
11 . The display device of claim 1 , wherein the third semiconductor portion encloses the first contact hole in a plan view.
12 . The display device of claim 1 , wherein the third semiconductor portion comprises a contact region overlapping the first contact hole and a non-contact region not overlapping the first contact hole, and
wherein edges of the third semiconductor portion and edges of the first contact hole are separated from each other in the non-contact region.
13 . The display device of claim 6 , wherein the connector crosses the first scan line.
14 . The display device of claim 6 , further comprising:
a second scan line between the substrate and the insulating layer and transmitting a second scan signal,
wherein a gate electrode of the second transistor is electrically connected to the second scan line.