Organic electroluminescent device and electronic apparatus
An organic electroluminescent device includes a first transistor, an organic electroluminescent element that emits light with luminance corresponding to magnitude of a current supplied via the first transistor, and a capacitive element. The capacitive element includes a first electrode connected to a gate of the first transistor, a second electrode, and a dielectric film provided between the first electrode and the second electrode. The first electrode is formed on the same layer as the second electrode, and is arranged in a position away from the second electrode with the dielectric film interposed therebetween.
1. An organic electroluminescent device, comprising:
a first transistor;
an organic electroluminescent element that emits light with luminance corresponding to magnitude of a current supplied via the first transistor; and
a capacitive element formed by at least
a first pair of electrodes stacked in a stacking direction with a first dielectric film disposed there-between, and
a second pair of electrodes disposed on a same layer in a planar direction with a second dielectric film disposed there-between,
such that the capacitive element is formed both in the stacking direction and the planar direction, wherein:
the second pair of electrodes include a first electrode connected to a gate of the first transistor and a second electrode, and
the first electrode is arranged in a position away from the second electrode with the second dielectric film interposed there-between in a plan view.
2. The organic electroluminescent device according to claim 1 , comprising:
a power supply line layer connected to one current terminal of the first transistor, wherein:
the second electrode is connected to the power supply line layer connected to the first transistor, and
the first electrode is arranged to be surrounded by the second electrode in the plan view.
3. The organic electroluminescent device according to claim 2 , wherein:
the capacitive element includes a third electrode, and
the third electrode is connected to the power supply line layer, and is arranged to be surrounded by the first electrode in the plan view.
4. The organic electroluminescent device according to claim 3 , wherein
the power supply line layer is provided on a layer over the second electrode and the third electrode, and
the second electrode is connected to the power supply line layer via a first conduction portion, and the third electrode is connected to the power supply line layer via a second conduction portion.
5. The organic electroluminescent device according to claim 4 , comprising:
an electrode connected to the gate of the first transistor, wherein
the electrode is arranged on a layer under the third electrode, and is arranged in a position overlapping at least a portion of the third electrode in the plan view.
6. The organic electroluminescent device according to claim 5 , wherein
an active layer is formed on a layer under the electrode, and
impurities are implanted into the active layer.
7. The organic electroluminescent device according to claim 1 , comprising:
an electrode connected to the gate of the first transistor, wherein the electrode is arranged on a layer under the second electrode, and is arranged in a position overlapping at least a portion of the second electrode in the plan view.
8. The organic electroluminescent device according to claim 7 , wherein
an active layer is formed on a layer under the electrode, and
impurities are implanted into the active layer.
9. The organic electroluminescent device according to claim 1 , wherein
the power supply line layer is formed on a layer over the first electrode, and is arranged in a position overlapping the first electrode in the plan view.
10. The organic electroluminescent device according to claim 1 , wherein
the capacitive element and the first transistor are arranged to overlap each other in the plan view.
11. The organic electroluminescent device according to claim 1 , wherein
the capacitive element and the first transistor are arranged to overlap each other in the plan view.
12. An electronic apparatus comprising the organic electroluminescent device according to claim 1 .
13. An organic electroluminescent device, comprising:
a scanning line;
a signal line; and
a pixel circuit connected to the scanning line and the signal line, the pixel circuit including:
a first transistor having one current terminal connected to a power supply line layer;
an organic electroluminescent element that has a pixel electrode, and that emits light with luminance corresponding to magnitude of a current supplied via the first transistor; and
a capacitive element formed by at least
a first pair of electrodes stacked in a stacking direction with a first dielectric film disposed there-between, and
a second pair of electrodes disposed on a same layer in a planar direction with a second dielectric film disposed there-between,
such that the capacitive element is formed both in the stacking direction and the planar direction, wherein:
the second pair of electrodes include a first electrode connected to a gate of the first transistor and a second electrode, and
the first electrode is arranged in a position away from the second electrode with the second dielectric film interposed there-between in a plan view.
14. The organic electroluminescent device according to claim 13 , wherein
the power supply line layer is arranged between the first electrode and the signal line.
15. The organic electroluminescent device according to claim 13 , wherein
the power supply line layer is arranged between the first electrode, and the scanning lines and the signal line.
16. The organic electroluminescent device according to claim 13 , wherein
the power supply line layer is arranged between the first electrode and the pixel electrode.
17. The organic electroluminescent device according to claim 13 , comprising:
a plurality of conduction holes penetrating respective layers from a layer in which the current terminal of the first transistor is formed to a layer in which the pixel electrode has been formed; and
a plurality of relay electrodes respectively connected to the plurality of conduction holes, wherein
the other current terminal of the first transistor and the pixel electrode are connected by the plurality of conduction holes and the plurality of relay electrodes.
18. The organic electroluminescent device according to claim 13 , comprising:
a second transistor having one current terminal connected to a gate of the first transistor, and the other current terminal connected to the signal line, wherein
the signal line and the second transistor are arranged to overlap each other in the plan view.
19. The organic electroluminescent device according to claim 13 , comprising:
a second transistor having one current terminal connected to the gate of the first transistor, and the other current terminal connected to the signal line; and
a third transistor having one current terminal connected to the other current terminal of the first transistor, and the other current terminal connected to the other current terminal of the second transistor, wherein
the signal line and the third transistor are arranged to overlap each other in the plan view.
20. The organic electroluminescent device according to claim 13 , comprising:
a fourth transistor having one current terminal connected to the other current terminal of the first transistor and the other current terminal connected to the pixel electrode, wherein
the signal line and the fourth transistor are arranged to overlap each other in the plan view.
21. The organic electroluminescent device according to claim 13 , wherein
the first electrode is surrounded by the second electrode in the plan view.