Active matrix organic electroluminescent device and fabricating method thereof
View Patent ↗An organic electroluminescent device including a substrate, a gate line on the substrate, a data line on the substrate, wherein the data line crosses the gate line, a switching element connected to the gate line and the data line, a plurality of driving elements connected to the switching element, each of the plurality of driving elements are interconnected in parallel, and an organic electroluminescent diode connected to each of the plurality of driving elements.
1. An organic electroluminescent device, comprising:
a substrate;
a gate line on the substrate;
a data line on the substrate, wherein the data line crosses the gate line;
a switching element connected to the gate line and the data line;
a plurality of driving elements connected to the switching element, each of the plurality of driving elements are interconnected in parallel; and
an organic electroluminescent diode connected to each of the plurality of driving elements,
wherein the plurality of driving elements include:
a gate electrode;
a plurality of active layers separated from each other over the gate electrode and corresponding to the plurality of driving elements, respectively;
a source electrode on each of the plurality of active layers, the source electrode including an uneven shape having a plurality of protruding portions and receded portions such that each of the protruding portions overlap the gate electrode along a length of the gate electrode and the receded portions do not overlap the gate electrode along the length of the gate electrode; and
a drain electrode spaced apart from the source electrode,
wherein the source electrode and the drain electrode are symmetrical with respect to the gate electrode, the source electrode is electrically interconnected to the organic electroluminescent diode, and the plurality of protruding portions overlap each of the active layers with a gap between adjacent receded portions being greater than the spacing between each of the plurality of active layers.
2. The device according to claim 1 , wherein the plurality of driving elements include amorphous silicon thin film transistors.
3. The device according to claim 2 , further comprising a storage capacitor connected in parallel to the plurality of driving elements.
4. The device according to claim 3 , wherein the switching element includes an amorphous silicon thin film transistor.
5. The device according to claim 1 , further comprising a power line parallel to the data line and electrically connected to each of the plurality of driving elements.
6. A method of fabricating an organic electroluminescent device, comprising steps of:
forming a gate line on a substrate;
forming a switching element connected to the gate line;
forming a plurality of driving elements connected to the switching element, each of the plurality of driving elements are interconnected in parallel;
forming a data line, the data line crosses the gate line and is connected to the switching element; and
forming an organic electroluminescent diode connected to each of the plurality of driving elements,
wherein the plurality of driving elements include:
a gate electrode;
a plurality of active layers separated from each other over the gate electrode and corresponding to the plurality of driving elements, respectively;
a source electrode on each of the plurality of active layers, the source electrode including an uneven shape having a plurality of protruding portions and receded portions such that each of the protruding portions overlap the gate electrode along a length of the gate electrode and the receded portions do not overlap the gate electrode along the length of the gate electrode; and
a drain electrode spaced apart from the source electrode,
wherein the source electrode and the drain electrode are symmetrical with respect to the gate electrode, the source electrode is electrically interconnected to the organic electroluminescent diode, and the plurality of protruding portions overlap each of the active layers with a gap between adjacent receded portions being greater than the spacing between each of the plurality of active layers.
7. The method according to claim 6 , wherein the plurality of driving elements include amorphous silicon thin film transistors.
8. The method according to claim 7 , further comprising a step of forming a storage capacitor connected in parallel to the plurality of driving elements.
9. The method according to claim 8 , wherein the switching element includes an amorphous silicon thin film transistor.
10. The method according to claim 6 , further comprising a step of forming a power line parallel to the data line and electrically connected to each of the plurality of driving elements.
11. An organic electroluminescent device, comprising:
a substrate;
a gate line on the substrate;
a data line on the substrate, wherein the data line crosses the gate line;
a switching element connected to the gate line and the data line;
a plurality of driving elements connected to the switching element, each of the plurality of driving elements are interconnected in parallel; and
an organic electroluminescent diode connected to each of the plurality of driving elements,
wherein the plurality of driving elements include:
a gate electrode;
an active layer over the gate electrode;
a source electrode on the active layer, the source electrode includes an uneven shape having a plurality of protruding portions, which correspond to the plurality of driving elements, respectively, and receded portions such that each of the protruding portions overlap the gate electrode along a length of the gate electrode and the receded portions do not overlap the gate electrode along a length of the gate electrode; and
a drain electrode spaced apart from the source electrode,
wherein the source electrode and the drain electrode are symmetrical with respect to the gate electrode, the source electrode is electrically interconnected to the organic electroluminescent diode, and the plurality of protruding portions and the receded portions overlap the active layer.
12. A method of fabricating an organic electroluminescent device, comprising steps of:
forming a gate line on a substrate;
forming a switching element connected to the gate line;
forming a plurality of driving elements connected to the switching element, each of the plurality of driving elements are interconnected in parallel;
forming a data line, the data line crosses the gate line and is connected to the switching element; and
forming an organic electroluminescent diode connected to each of the plurality of driving elements,
wherein the plurality of driving elements include:
a gate electrode;
an active layer over the gate electrode;
a source electrode on the active layer, the source electrode includes an uneven shape having a plurality of protruding portions, which correspond to the plurality of driving elements, respectively, and receded portions such that each of the protruding portions overlap the gate electrode along a length of the gate electrode and the receded portions do not overlap the gate electrode along a length of the gate electrode; and
a drain electrode spaced apart from the source electrode,
wherein the source electrode and the drain electrode are symmetrical with respect to the gate electrode, the source electrode is electrically interconnected to the organic electroluminescent diode, and the plurality of protruding portions and the receded portions overlap the active layer.