Display apparatus and drive method therefor, and electronic equipment
View Patent ↗A drive section sequentially supplies respective scanning lines with a control signal and supplies respective signal lines with a video signal to carry out a correction operation for holding a voltage equivalent to a threshold voltage of a drive transistor in a holding capacitance, and subsequently performs a write operation for writing the video signal in the holding capacitance, and before the correction operation, the drive section switches potentials at the bias line and adds a coupling voltage to one current terminal of the drive transistor via an auxiliary capacitance to carry out a preparation operation for an initialization to set a potential difference between a control terminal and the one current terminal of the drive transistor larger than the threshold voltage.
1. A display device comprising:
a pixel array section; and
a drive section,
the pixel array section including pixels arranged in matrix and bias lines,
at least one of the pixels including a drive transistor, a light emitting element, a holding capacitance, and an auxiliary capacitance,
the auxiliary capacitance being connected between a first terminal of the holding capacitance and a bias line,
wherein the drive section is configured to carry out a correction operation, and
the drive section switches potentials at the bias line and adds a coupling voltage to the first terminal of the holding capacitance via the auxiliary capacitance.
2. The display device according to claim 1 , wherein
the drive section switches potentials at the bias line to set a potential difference between a control terminal and a first current terminal of the drive transistor to be larger than before switching the potentials at the bias line.
3. The display device according to claim 2 , wherein
the drive section switches potentials from a first potential to a second potential higher than the first potential at the bias line before supplying a signal potential from a data line to a gate of the drive transistor.
4. The display device according to claim 3 , wherein
the drive section switches potentials from the second potential to the first potential after supplying the signal potential.
5. The display device according to claim 1 , further comprising a first transistor and a first wiring
wherein the first transistor is configured to supply a reference voltage from the first wiring to a control terminal of the drive transistor.
6. The display device according to claim 5 , wherein a control terminal of the first transistor is connected to a first control line disposed in parallel to the bias line.
7. The display device according to claim 6 , wherein the first wiring is disposed in a first direction perpendicular to the first control line.
8. The display device according to claim 7 , wherein the first wiring is configured to supply the reference voltage and a data voltage sequentially.
9. The display device according to claim 6 , further comprising a power supply line disposed in parallel to the bias line and the first control line,
wherein the drive transistor is configured to supply a drive current from the power supply line to the light emitting element in accordance with a potential held in the holding capacitance.
10. The display device according to claim 5 , wherein a control terminal of the first transistor is connected to a first control line, the first control line being made of the same material as the bias line.
11. The display device according to claim 10 , wherein the same material comprises molybdenum.
12. The display device according to claim 10 , further comprising a power supply line made of the same material as the bias line and the first control line,
wherein the drive transistor is configured to supply a drive current from the power supply line to the light emitting element in accordance with a potential held in the holding capacitance.
13. The display device according to claim 5 , wherein a potential at the control terminal of the drive transistor is turned into a reference potential during a non-emission period.
14. The display device according to claim 5 , wherein the pixel array section is formed on an insulating substrate, the insulating substrate being made of glass.
15. The display device according to claim 14 ,
wherein the pixels comprise an amorphous silicon thin film transistor, and
wherein the scanner section is connected to the insulating substrate via a flexible cable.
16. The display device according to claim 14 ,
wherein the pixels comprise a low-temperature polysilicon thin film transistor, and
wherein the pixel array section and the scanner section are formed on the insulating substrate.
17. An electronic equipment comprising:
a display device; and
a flexible print circuit connected to the display device to input a signal from outside of the display device;
the display device comprising,
a pixel array section; and
a drive section,
the pixel array section including pixels arranged in matrix and bias lines,
at least one of the pixels including a drive transistor, a light emitting element, a holding capacitance, and an auxiliary capacitance,
the auxiliary capacitance being connected between a first terminal of the holding capacitance and a bias line,
wherein the drive section is configured to carry out a correction operation, and
the drive section switches potentials at the bias line and adds a coupling voltage to the first terminal of the holding capacitance via the auxiliary capacitance.
18. The electronic equipment according to claim 17 , wherein
the drive section switches potentials at the bias line to set a potential difference between a control terminal and a first current terminal of the drive transistor to be larger than before switching the potentials at the bias line.
19. The electronic equipment according to claim 18 , wherein
the drive section switches potentials from a first potential to a second potential higher than the first potential at the bias line before supplying a signal potential from a data line to a gate of the drive transistor.
20. The electronic equipment according to claim 19 , wherein
the drive section switches potentials from the second potential to the first potential after supplying the signal potential.
21. The electronic equipment according to claim 17 , further comprising a first transistor and a first wiring
wherein the first transistor is configured to supply a reference voltage from the first wiring to a control terminal of the drive transistor.
22. The electronic equipment according to claim 21 , wherein a control terminal of the first transistor is connected to a first control line disposed in parallel to the bias line.
23. The electronic equipment according to claim 22 , wherein the first wiring is disposed in a first direction perpendicular to the first control line.
24. The electronic equipment according to claim 23 , wherein the first wiring is configured to supply the reference voltage and a data voltage sequentially.
25. The electronic equipment according to claim 22 , further comprising a power supply line disposed in parallel to the bias line and the first control line,
wherein the drive transistor is configured to supply a drive current from the power supply line to the light emitting element in accordance with a potential held in the holding capacitance.
26. The electronic equipment according to claim 21 , wherein a control terminal of the first transistor is connected to a first control line, the first control line being made of the same material as the bias line.
27. The electronic equipment according to claim 26 , wherein the same material comprises molybdenum.
28. The electronic equipment according to claim 26 , further comprising a power supply line made of the same material as the bias line and the first control line,
wherein the drive transistor is configured to supply a drive current from the power supply line to the light emitting element in accordance with a potential held in the holding capacitance.
29. The electronic equipment according to claim 21 , wherein a potential at the control terminal of the drive transistor is turned into a reference potential during a non-emission period.
30. The electronic equipment according to claim 21 , wherein the pixel array section is formed on an insulating substrate, the insulating substrate being made of glass.
31. The electronic equipment according to claim 30 ,
wherein the pixels comprise an amorphous silicon thin film transistor, and
wherein the scanner section is connected to the insulating substrate via a flexible cable.
32. The electronic equipment according to claim 30 ,
wherein the pixels comprise a low-temperature polysilicon thin film transistor, and
wherein the pixel array section and the scanner section are formed on the insulating substrate.