Organic electro luminescent display device and method of fabricating the same
View Patent ↗An organic electroluminescent display (ELD) device includes a first substrate, a second substrate spaced apart and facing the first substrate, a plurality of switching elements and a plurality of driving elements interconnected on the first substrate, a plurality of connecting electrodes connected to each of the driving elements, a plurality of subsidiary electrodes formed on an inner surface of the second substrate in spaces between two adjacent pixel regions, a first electrode formed on the inner surface of the second substrate covering each of the subsidiary electrodes, an organic light-emitting layer disposed on the first electrode, and a second electrode having first portions disposed on the organic light-emitting layer.
1. An organic electroluminescent display (ELD) device, comprising:
a first substrate;
a second substrate spaced apart and facing the first substrate;
a plurality of switching elements and a plurality of driving elements interconnected on the first substrate;
a plurality of connecting electrodes connected to each of the driving elements;
a plurality of subsidiary electrodes formed on an inner surface of the second substrate in spaces between two adjacent pixel regions;
a first electrode formed on the inner surface of the second substrate covering each of the subsidiary electrodes;
an organic light-emitting layer disposed on the first electrode; and
a second electrode having first portions disposed on the organic light-emitting layer.
2. The device according to claim 1 , wherein the subsidiary electrodes form a lattice shape.
3. The device according to claim 1 , further comprising a plurality of partitions having first end portions of a first width and second end portions of a second width.
4. The device according to claim 3 , wherein each of the first end portions are disposed on the first electrode in alignment with each of the subsidiary electrodes.
5. The device according to claim 3 , wherein the second width is larger than the first width.
6. The device according to claim 5 , wherein the second electrode includes second portions disposed on the second end portions of the partitions.
7. The device according to claim 6 , wherein the second end portions are aligned with the driving elements.
8. The device according to claim 1 , wherein the subsidiary electrode includes one of aluminum (Al), chromium (Cr), and molybdenum (Mo).
9. The device according to claim 8 , wherein an electrical resistance of the subsidiary electrode is lower than an electrical resistance of the first electrode.
10. The device according to claim 1 , wherein the first electrode functions as an anode electrode to input holes into the organic light-emitting layer, and the second electrode functions as a cathode electrode to input electrons into the organic light-emitting layer.
11. The device according to claim 10 , wherein the first electrode includes indium-tin-oxide (ITO).
12. The device according to claim 10 , wherein the second electrode includes one of calcium (Ca), aluminum (Al), and magnesium (Mg).
13. The device according to claim 1 , wherein the connecting electrode includes one of calcium (Ca), aluminum (Al) and magnesium (Mg).
14. The device according to claim 1 , wherein the organic light-emitting layer includes a hole-carrying layer adjacent to the first electrode and an electron-carrying layer adjacent to the first portions of the second electrode.
15. The device according to claim 1 , wherein the subsidiary electrode includes a conductive metal material having an electrical resistance lower than an electrical resistance of the first electrode.
16. The device according to claim 1 , wherein the subsidiary electrode includes one of aluminum (Al), aluminum alloys (AlNd), chromium (Cr), tungsten (W), molybdenum (Mo), and copper (Cu).
17. The device according to claim 1 , wherein each of the switching elements and the driving elements include an active layer, a gate electrode, a source electrode, and a drain electrode.
18. A method of fabricating an organic electroluminescent display (ELD) device, comprising steps of:
forming a plurality of switching elements and a plurality of driving elements interconnected on a first substrate;
forming a plurality of connecting electrodes interconnected to each of the driving elements;
forming a plurality of subsidiary electrodes within spaces between two adjacent pixel regions of a second substrate;
forming a first electrode on an inner surface of the second substrate covering the plurality of subsidiary electrodes;
forming an organic light-emitting layer on the first electrode;
forming first portions of a second electrode on the organic light-emitting layer; and
bonding the first and second substrates so that the connecting electrode of the first substrate contacts the second electrode.
19. The method according to claim 18 , wherein the subsidiary electrodes form a lattice shape.
20. The method according to claim 18 , further comprising a step of forming a plurality of partitions having first end portions of a first width and second end portions of a second width.
21. The method according to claim 20 , wherein each of the first end portions are formed on the first electrode in alignment with each of the subsidiary electrodes.
22. The method according to claim 20 , wherein the second width is larger than the first width.
23. The method according to claim 22 , further comprising a step of forming second portions of the second electrode on the second end portions of the partitions.
24. The method according to claim 23 , wherein the second end portions are aligned with the driving elements.
25. The method according to claim 18 , wherein the subsidiary electrode includes one of aluminum (Al), chromium (Cr), and molybdenum (Mo).
26. The method according to claim 25 , wherein an electrical resistance of the subsidiary electrode is lower than an electrical resistance of the first electrode.
27. The method according to claim 18 , wherein the first electrode functions as an anode electrode to input holes into the organic light-emitting layer, and the second electrode functions as a cathode electrode to input electrons into the organic light-emitting layer.
28. The method according to claim 27 , wherein the first electrode includes indium-tin-oxide (ITO).
29. The method according to claim 27 , wherein the second electrode includes one of calcium (Ca), aluminum (Al), and magnesium (Mg).
30. The method according to claim 18 , wherein the connecting electrode includes one of calcium (Ca), aluminum (Al) and magnesium (Mg).
31. The method according to claim 18 , wherein the organic light-emitting layer includes a hole-carrying layer adjacent to the first electrode and an electron-carrying layer adjacent to the first portions of the second electrode.
32. The method according to claim 18 , wherein the subsidiary electrode includes a conductive metal material having an electrical resistance lower than an electrical resistance of the first electrode.
33. The method according to claim 18 , wherein the subsidiary electrode includes one of aluminum (Al), aluminum alloys (AlNd), chromium (Cr), tungsten (W), molybdenum (Mo), and copper (Cu).
34. The method according to claim 18 , wherein each of the switching elements and the driving elements include an active layer, a gate electrode, a source electrode, and a drain electrode.
35. An organic electroluminescent display (ELD) device, comprising:
a first substrate;
a second substrate spaced apart and facing the first substrate;
a plurality of switching elements and a plurality of driving elements interconnected on the first substrate;
a plurality of connecting electrodes connected to each of the driving elements;
a first electrode formed on an inner surface of the second substrate;
a plurality of subsidiary electrodes formed on the first electrode within spaces between two adjacent pixel regions;
a plurality of partitions having first end portions of a first width disposed on the subsidiary electrodes and the first electrode and second end portions of a second width larger than the first width;
a plurality of organic light-emitting layers disposed on the first electrode between the plurality of partitions; and
a second electrode disposed on the organic light-emitting layers and the second end portions of the plurality of partitions.