Display device, driving method thereof, and electronic device
View Patent ↗Disclosed herein is a display device including: a pixel array unit; and a driving unit; wherein the pixel array unit includes first scanning lines and second scanning lines in a form of rows, signal lines in a form of columns, and pixels in a form of a matrix, the pixels being disposed at parts where the first scanning lines and the signal lines intersect each other, each pixel includes a drive transistor of an N-channel type, a sampling transistor, a switching transistor, a retaining capacitance, and a light emitting element, the driving unit includes a write scanner for sequentially supplying a control signal to each first scanning line, a drive scanner for sequentially supplying a control signal to each second scanning line, and a signal selector for alternately supplying a signal potential as a video signal and a predetermined reference potential to each signal line.
1. A display device comprising:
a switching transistor controllable to provide electrical connection and disconnection between an anode of a light emitting element and a terminal of an auxiliary capacitance, said terminal of the auxiliary capacitance being directly electrically connected to a terminal of a retaining capacitance and being directly electrically connected to a drain terminal of the switching transistor;
a drive transistor controllable to provide electrical connection and disconnection between said drain terminal of the switching transistor and a power supply line, said power supply line being directly electrically connected to a different terminal of the auxiliary capacitance and being directly electrically connected to a drain terminal of the drive transistor;
a sampling transistor controllable to provide electrical connection and disconnection between a signal line and a gate terminal of the drive transistor, said gate terminal of the drive transistor being directly electrically connected to a different terminal of the retaining capacitance and being directly electrically connected to a drain terminal of the sampling transistor; and
a source terminal of the drive transistor directly electrically connected to said drain terminal of the switching transistor and directly electrically connected to said terminal of the auxiliary capacitance.
2. The display device according to claim 1 , wherein a drive scanner is directly electrically connected to a gate terminal of the switching transistor.
3. The display device according to claim 2 , wherein a drive control signal output from said drive scanner controls said switching transistor to electrically connect said drain terminal of the switching transistor to said power supply line.
4. The display device according to claim 3 , wherein a drive control signal output from said drive scanner controls said switching transistor to electrically disconnect said drain terminal of the switching transistor from said power supply line.
5. The display device according to claim 1 , wherein a write scanner is directly electrically connected to a gate terminal of the sampling transistor.
6. The display device according to claim 5 , wherein a write control signal output from said write scanner controls said sampling transistor to electrically connect said signal line to said gate terminal of the drive transistor.
7. The display device according to claim 6 , wherein a write control signal output from said write scanner controls said sampling transistor to electrically disconnect said signal line from said gate terminal of the drive transistor.
8. The display device according to claim 1 , wherein a horizontal selector is configured to output a video signal onto said signal line.
9. The display device according to claim 1 , wherein a source terminal of the sampling transistor is directly electrically connected to said signal line.
10. The display device according to claim 1 , wherein a drain terminal of the drive transistor is directly electrically connected to said power supply line.
11. The display device according to claim 1 , a source terminal of the switching transistor is directly electrically connected to said anode of the light emitting element.
12. The display device according to claim 1 , wherein a cathode of the light emitting element is directly electrically connected to a grounding line.
13. The display device according to claim 1 , wherein an emission period is a time period when light is emissible from said light emitting element, a non-emission period being a time period when said light is non-emissible from said light emitting element.
14. The display device according to claim 13 , wherein said terminal of the auxiliary capacitance is directly electrically connected to said terminal of the retaining capacitance and is directly electrically connected to said drain terminal of the switching transistor during an entirety of said emission period and during an entirety of said non-emission period.
15. The display device according to claim 13 , wherein said power supply line is directly electrically connected to said different terminal of the auxiliary capacitance and said drain terminal of the drive transistor during an entirety of said emission period and during an entirety of said non-emission period.
16. The display device according to claim 13 , wherein said gate terminal of the drive transistor is directly electrically connected to said different terminal of the retaining capacitance and is directly electrically connected to said drain terminal of the sampling transistor during an entirety of said emission period and during an entirety of said non-emission period.