Display device, driving method thereof, and electronic apparatus
View Patent ↗A display device comprises a pixel array unit including a plurality of pixels, and power supply lines and a power supply scanner for supplying a power supply voltage switching between first and second potentials to each of the power supply lines, wherein each of the pixels includes a light emitting element, a sampling transistor, a driver transistor, and a holding capacitor. The sampling transistor samples a signal potential to be held in the holding capacitor, the driver transistor receives a supply of a current from the power supply scanner through the power supply line at a first potential and flows a drive current to the light emitting element in accordance with the held signal potential, and the power supply scanner changes the power supply line from the first potential to the second potential before the sampling transistors samples the signal potential.
1. A display device comprising:
a pixel array unit including a plurality of pixels, and power supply lines; and
a power supply scanner for supplying a power supply voltage switching between first and second potentials to each of the power supply lines,
wherein a given one of the plurality of pixels includes a light emitting element, a sampling transistor, a driver transistor, and a holding capacitor,
wherein the sampling transistor samples a signal potential to be held in the holding capacitor,
the driver transistor is connected to the light emitting element and is configured to control a drive current flowing through the light emitting element in accordance with the held signal potential, and
the power supply scanner causes the light emitting element to be in a non-emission state by changing one of the power supply lines from the first potential to the second potential before the sampling transistor samples the signal potential.
2. The display device of claim 1 ,
wherein the drive current flows through the one of the power supply lines at the first potential.
3. The display device of claim 2 ,
wherein the drive transistor is connected between the one of the power supply lines and the light emitting element.
4. The display device of claim 3 ,
wherein the power supply scanner causes the light emitting element to be in a non-emission state by changing the one of the power supply lines from the first potential to the second potential at a first timing, the sampling transistor samples the signal potential at a second timing, and the power supply scanner changes the one of the power supply lines from the second potential to the first potential at a third timing subsequent to the second timing,
the signal potential during a time period from the second timing to the third timing is a reference potential, and
the signal potential at a fourth timing subsequent to the third timing is a video signal potential.
5. The display device of claim 4 , further comprising:
a control unit that includes the power supply scanner, the control unit being configured to perform a threshold correction operation at the third timing of causing the holding capacitor to hold a threshold voltage of the driver transistor,
wherein the threshold correction operation begins at the third timing.
6. The display device of claim 1 ,
wherein the drive transistor is connected between the one of the power supply lines and the light emitting element.
7. The display device of claim 1 ,
wherein the drive transistor is connected to an anode of the light emitting element.
8. The display device of claim 1 ,
wherein the drive transistor is connected to a cathode of the light emitting element.
9. An electronic apparatus that includes the display device of claim 1 .
10. A display device comprising:
a pixel array unit including a plurality of pixels, and power supply lines; and
a power supply scanner for supplying a power supply voltage switching between first and second potentials to each of the power supply lines,
wherein a given one of the plurality of pixels includes a light emitting element, a sampling transistor, a driver transistor, and a holding capacitor,
wherein the sampling transistor samples a signal potential to be held in the holding capacitor,
the driver transistor is connected between one of the power supply lines and the light emitting element and is configured to control a drive current flowing through the light emitting element in accordance with the held signal potential, and
the power supply scanner changes the one of the power supply lines from the first potential to the second potential before the sampling transistor samples the signal potential.
11. The display device of claim 10 ,
wherein the drive current flows through the one of the power supply lines at the first potential.
12. The display device of claim 10 ,
wherein the drive transistor is connected to an anode of the light emitting element.
13. The display device of claim 10 ,
wherein the drive transistor is connected to a cathode of the light emitting element.
14. An electronic apparatus that includes the display device of claim 10 .
15. A display device comprising:
a pixel array unit including a plurality of pixels, and power supply lines; and
a power supply scanner for supplying a power supply voltage switching between first and second potentials to each of the power supply lines,
wherein a given one of the plurality of pixels includes a light emitting element, a sampling transistor, a driver transistor, and a holding capacitor,
wherein the sampling transistor samples a signal potential to be held in the holding capacitor,
the driver transistor is connected to the light emitting element and is configured to control a drive current flowing through the light emitting element in accordance with the held signal potential, the drive current flowing through one of the power supply lines at the first potential, and
the power supply scanner changes the one of the power supply lines from the first potential to the second potential before the sampling transistor samples the signal potential.
16. The display device of claim 15 ,
wherein the drive transistor is connected to an anode of the light emitting element.
17. The display device of claim 15 ,
wherein the drive transistor is connected to a cathode of the light emitting element.
18. An electronic apparatus that includes the display device of claim 15 .