Display device and electronic apparatus
View Patent ↗There is provided a display device including pixel circuits which are arranged and each of which includes a driving transistor to drive an electro-optical element and a capacitor connected between a gate electrode and one source/drain electrode of the driving transistor. The driving transistor is configured by stacking the gate electrode and the source/drain electrode and a peripheral portion of the gate electrode is covered by the source/drain electrode.
1. A display device comprising:
pixel circuits which are arranged over a substrate and each pixel circuit includes a driving transistor to drive an electro-optical element and a capacitor connected between a gate electrode and a source electrode of the driving transistor,
wherein the driving transistor is configured by stacking the gate electrode and the source electrode over the substrate and a peripheral portion of the gate electrode is three-dimensionally covered by the source electrode such that the source electrode extends above the gate electrode and a tubular portion of the source electrode covers each of the sides of the gate electrode on the substrate, wherein a parasitic capacitance is not generated between the gate electrode of the driving transistor and a signal line, and
wherein each of the pixel circuits is configured to perform a mobility correction of the driving transistor by applying a negative feedback to a gate-source potential difference of the driving transistor with a correction amount according to a current flowing to the driving transistor during a writing operation of a video signal.
2. The display device according to claim 1 ,
wherein a peripheral portion of a channel formation layer of the driving transistor is covered by the source electrode.
3. The display device according to claim 1 ,
wherein the driving transistor is formed over a semiconductor.
4. The display device according to claim 1 ,
wherein the driving transistor is formed over an insulator formed over a conductor.
5. The display device according to claim 1 , wherein the pixel circuit flows the current to the driving transistor and performs writing of the video signal and the mobility correction of the driving transistor.
6. An electronic apparatus comprising:
a display device including pixel circuits which are arranged over a substrate and each pixel circuit includes a driving transistor to drive an electro-optical element, and a capacitor connected between a gate electrode and a source electrode of the driving transistor,
wherein the driving transistor is configured by stacking a gate electrode and the source electrode over the substrate and a peripheral portion of the gate electrode is three-dimensionally covered by the source electrode such that the source electrode extends above the gate electrode and a tubular portion of the source electrode covers each of the sides of the gate electrode on the substrate, wherein a parasitic capacitance is not generated between the gate electrode of the driving transistor and a signal line, and
wherein each of the pixel circuits is configured to perform a mobility correction of the driving transistor by applying a negative feedback to a gate-source potential difference of the driving transistor with a correction amount according to a current flowing to the driving transistor during a writing operation of a video signal.
7. The electronic apparatus according to claim 6 ,
wherein a peripheral portion of a channel formation layer of the driving transistor is covered by the source electrode.
8. The electronic apparatus according to claim 6 , wherein the driving transistor is formed over a semiconductor.
9. The electronic apparatus according to claim 6 , wherein the driving transistor is formed over an insulator formed over a conductor.
10. The electronic apparatus according to claim 6 ,
wherein the pixel circuit flows the current to the driving transistor and performs writing of the video signal and the mobility correction of the driving transistor.
11. A display device comprising:
pixel circuits which are arranged over a substrate and each pixel circuit includes a driving transistor to drive an electro-optical element and a capacitor connected between a gate electrode and a source electrode of the driving transistor,
wherein the driving transistor is configured by stacking the gate electrode and a drain electrode over the substrate and a peripheral portion of the gate electrode is three-dimensionally covered by the drain electrode such that the drain electrode extends above the gate electrode and a tubular portion of the drain electrode covers each of the sides of the gate electrode on the substrate, wherein a parasitic capacitance is not generated between the gate electrode of the driving transistor and a signal line, and
wherein each of the pixel circuits is configured to perform a mobility correction of the driving transistor by applying a negative feedback to a gate-source potential difference of the driving transistor with a correction amount according to a current flowing to the driving transistor during a writing operation of a video signal.
12. The display device according to claim 11 ,
wherein a peripheral portion of a channel formation layer of the driving transistor is covered by the drain electrode.
13. The display device according to claim 11 ,
wherein the driving transistor is formed over a semiconductor.
14. The display device according to claim 11 ,
wherein the driving transistor is formed over an insulator formed over a conductor.
15. The display device according to claim 11 ,
wherein the pixel circuit flows the current to the driving transistor and performs writing of the video signal and the mobility correction of the driving transistor.
16. An electronic apparatus comprising:
a display device including pixel circuits which are arranged over a substrate and each pixel circuit includes a driving transistor to drive an electro-optical element, and a capacitor connected between a gate electrode and a source electrode of the driving transistor,
wherein the driving transistor is configured by stacking a gate electrode and a drain electrode over the substrate and a peripheral portion of the gate electrode is three-dimensionally covered by the drain electrode such that the drain electrode extends above the gate electrode and a tubular portion of the drain electrode covers each of the sides of the gate electrode on the substrate, wherein a parasitic capacitance is not generated between the gate electrode of the driving transistor and a signal line, and
wherein each of the pixel circuits is configured to perform a mobility correction of the driving transistor by applying a negative feedback to a gate-source potential difference of the driving transistor with a correction amount according to a current flowing to the driving transistor during a writing operation of a video signal.
17. The electronic apparatus according to claim 16 , wherein a peripheral portion of a channel formation layer of the driving transistor is covered by the drain electrode.
18. The electronic apparatus according to claim 16 , wherein the driving transistor is formed over a semiconductor.
19. The electronic apparatus according to claim 16 , wherein the driving transistor is formed over an insulator formed over a conductor.
20. The electronic apparatus according to claim 16 ,
wherein the pixel circuit flows the current to the driving transistor and performs writing of the video signal and the mobility correction of the driving transistor.