Display device
View Patent ↗Provided is a display device including: a capacitor having a first electrode, a first insulating film over the first electrode, and a second electrode over the first insulating film; and a first transistor over the capacitor. The first transistor includes the second electrode, a second insulating film over the second electrode, an oxide semiconductor film over the second insulating film, and a first source electrode and a first drain electrode over the oxide semiconductor film. The first source electrode and the first drain electrode are electrically connected to the oxide semiconductor film.
1. A display device comprising:
a capacitor comprising:
a first electrode;
a first insulating film over the first electrode; and
a second electrode over the first insulating film;
a first transistor over the capacitor, the first transistor comprising:
the second electrode;
a second insulating film over the second electrode;
an oxide semiconductor film over the second insulating film; and
a first source electrode and a first drain electrode over the oxide semiconductor film, the first source electrode and the first drain electrode being electrically connected to the oxide semiconductor film, and
a second transistor comprising:
a semiconductor film under the first insulating film;
a gate electrode over the first insulating film;
the second insulating film over the gate electrode; and
a second source electrode and a second drain electrode over the second insulating film, the second source electrode and the second drain electrode being electrically connected to the semiconductor film,
wherein the semiconductor film comprises silicon.
2. The display device according to claim 1 ,
wherein the second electrode is shared by the capacitor and the first transistor.
3. The display device according to claim 1 ,
wherein the first electrode includes silicon.
4. The display device according to claim 1 ,
wherein the oxide semiconductor film overlaps with the second electrode.
5. The display device according to claim 1 ,
wherein an area of the oxide semiconductor film is smaller than an area of the second electrode.
6. The display device according to claim 1 , further comprising pixels arranged in a matrix, each of the pixels comprising:
an organic light-emitting element;
the first transistor connected to the organic light-emitting element;
the capacitor connected to the first transistor; and
the second transistor connected to the capacitor.
7. The display device according to claim 1 ,
wherein one of the second source electrode and the second drain electrode is electrically connected to the second electrode.
8. The display device according to claim 1 ,
wherein the first source electrode, the first drain electrode, the second source electrode, and the second drain electrode exist in the same layer.
9. The display device according to claim 1 , further comprising an interlayer film over the first source electrode and the first drain electrode,
wherein the interlayer film is sandwiched between the second source electrode and the second insulating film and between the second drain electrode and the second insulating film.
10. The display device according to claim 1 , further comprising a light-emitting element electrically connected to one of the first source electrode and the first drain electrode.
11. A display device comprising:
a capacitor comprising:
a first electrode;
a first insulating film over the first electrode; and
a second electrode over the first insulating film;
a first transistor over the second electrode, the first transistor comprising:
the second electrode;
a second insulating film over the second electrode;
an oxide semiconductor film over the second insulating film; and
a first source electrode and a first drain electrode over the oxide semiconductor film, the first source electrode and the first drain electrode being electrically connected to the oxide semiconductor film; and
a second transistor comprising:
a semiconductor film under the first insulating film;
a gate electrode over the first insulating film; and
a second source electrode and a second drain electrode being electrically connected to the semiconductor film,
wherein the semiconductor film comprises silicon.
12. The display device according to claim 11 ,
wherein the second electrode is shared by the capacitor and the first transistor.
13. The display device according to claim 11 ,
wherein the first electrode includes silicon.
14. The display device according to claim 11 ,
wherein the oxide semiconductor film overlaps with the second electrode.
15. The display device according to claim 11 ,
wherein an area of the oxide semiconductor film is smaller than an area of the second electrode.
16. The display device according to claim 11 , wherein each of the first electrode and the semiconductor film comprises polysilicon, and
the first electrode and the semiconductor film are formed in the same layer.
17. The display device according to claim 16 ,
wherein one of the second source electrode and the second drain electrode is electrically connected to the second electrode.
18. The display device according to claim 16 ,
wherein the first source electrode, the first drain electrode, the second source electrode, and the second drain electrode exist in the same layer.
19. The display device according to claim 16 , wherein the second electrode is used for a predetermined capacitor electrode of the capacitor, and
the second electrode is used for a predetermined gate electrode of the first transistor.
20. The display device according to claim 16 , further comprising a light-emitting element electrically connected to one of the first source electrode and the first drain electrode.
21. A display device comprising:
a capacitor comprising:
a polysilicon electrode;
a first insulating film over the polysilicon electrode; and
a first electrode over the first insulating film; and
a first transistor over the first electrode, the first transistor comprising:
the first electrode;
a second insulating film over the first electrode;
an oxide semiconductor film over the second insulating film; and
a first source electrode and a first drain electrode over the oxide semiconductor film, the first source electrode and the first drain electrode overlapping with the first electrode and being electrically connected to the oxide semiconductor film.
22. The display device according to claim 21 ,
wherein the first electrode is shared by the capacitor and the first transistor.
23. The display device according to claim 21 ,
wherein the polysilicon electrode overlaps with the oxide semiconductor film.
24. The display device according to claim 21 ,
wherein the oxide semiconductor film overlaps with the first electrode.
25. The display device according to claim 21 ,
wherein an area of the oxide semiconductor film is smaller than an area of the first electrode.
26. The display device according to claim 21 , further comprising a second transistor, the second transistor comprising:
a semiconductor film under the first insulating film;
a gate electrode over the first insulating film; and
a second source electrode and a second drain electrode being electrically connected to the semiconductor film.
27. The display device according to claim 26 ,
wherein one of the second source electrode and the second drain electrode is electrically connected to the first electrode.
28. The display device according to claim 26 ,
wherein the first source electrode, the first drain electrode, the second source electrode, and the second drain electrode exist in the same layer.
29. The display device according to claim 26 , wherein the second electrode is used for a predetermined capacitor electrode of the capacitor, and
the second electrode is used for a predetermined gate electrode of the first transistor.
30. The display device according to claim 26 , further comprising a light-emitting element electrically connected to one of the first source electrode and the first drain electrode.