Organic electroluminescent display device and method of fabricating the same
View Patent ↗An organic electroluminescent display device includes a substrate, gate and data lines on the substrate and crossing each other to define a pixel region, a switching element at each crossing point of the gate and data lines, a driving element coupled to the switching element, a field control electrode coupled to the driving element and overlapping a channel of the driving element, and an organic electroluminescent diode coupled to the driving element.
1. An organic electroluminescent display device, comprising:
a substrate;
a plurality of gate and data lines on the substrate and crossing each other to define a pixel region;
a switching element at each crossing point of the gate and data lines;
a driving element coupled to the switching element;
a field control electrode coupled to the driving element and overlapping a channel of the driving element; and
an organic electroluminescent diode coupled to the driving element,
wherein the channel of the driving element is disposed between the field control electrode and a gate electrode of the driving element.
2. The device according to claim 1 , wherein an overlapping width between the field control electrode and the channel of the driving element is shorter than a length of the channel of the driving element.
3. The device according to claim 2 , wherein the length of the channel is two times longer than the overlapping width.
4. The device according to claim 1 , wherein the switching element and the driving element are formed of amorphous silicon.
5. The device according to claim 1 , wherein the switching element includes a first gate electrode coupled to the gate line, a first source electrode coupled to the data line, and a first drain electrode spaced apart from the first source electrode, and the driving element includes a second gate electrode coupled to the first drain electrode, a second source electrode grounded and a second drain electrode coupled to the organic electroluminescent diode.
6. The device according to claim 5 , wherein the second drain electrode is coupled to the field control electrode.
7. The device according to claim 1 , wherein the organic electroluminescent diode includes a first electrode coupled to the field control electrode, a second electrode coupled to a power supply line and an organic light-emitting layer interposed between the first and second electrodes.
8. The device according to claim 1 , wherein the driving element includes a thin film transistor, and a drain electrode of the driving element is coupled to the field control electrode.
9. The device according to claim 8 , wherein the thin film transistor includes one of an n-type and a p-type.