Organic light-emitting diode display device and driving method thereof
View Patent ↗An organic light-emitting diode display device includes a first switch element turned-on in response to a first scanning signal during a first period to supply a data to a first node, and then maintaining an off-state during a second period, a driving device adjusting a current through an organic light-emitting diode element in accordance with a voltage of the first node; a reference voltage source providing a reference voltage that is capable of turning-off the driving device, a second switch element maintaining an off-state during the first period, and turned-on during the second period to supply the reference voltage to the first node, and a storage capacitor maintaining the voltage at the first node.
1. An organic light-emitting diode display device, comprising:
a driving voltage source providing a driving voltage;
a ground voltage source providing a ground voltage;
a first scan line receiving a first scanning signal;
a second scan line receiving a second scanning signal;
a data line crossing the first and second scan lines;
a first switch element turned-on in response to the first scanning signal during a first period to supply a data from the data line to a first node, and then maintaining an off-state during a second period;
a driving device adjusting a current through an organic light-emitting diode element in accordance with a voltage of the first node;
a reference voltage source providing a reference voltage that is capable of turning-off the driving device;
a second switch element maintaining an off-state during the first period, and turned-on during the second period to supply the reference voltage to the first node; and
a storage capacitor maintaining the voltage at the first node.
2. The organic light-emitting diode display device as claimed in claim 1 , wherein
the organic light-emitting diode element is connected between the driving device and the ground voltage source; and
the storage capacitor is connected between the driving voltage source and the first node.
3. The organic light-emitting diode display device as claimed in claim 2 , wherein
the driving device includes a P-type MOS-FET;
the switch elements includes one of a P-type MOS-FET and an N-type MOS-FET;
the first switch element includes a gate electrode connected to the first scan line, a source electrode connected to the data line, and a drain electrode connected to the first node;
the driving device includes a gate electrode connected to the first node, a source electrode connected to the driving voltage source, and a drain electrode connected to an anode electrode of the organic light-emitting diode element; and
the second switch element includes a gate electrode connected to the second scan line, a source electrode connected to the reference voltage source, and a drain electrode connected to the first node.
4. The organic light-emitting diode display device as claimed in claim 1 , wherein the storage capacitor is connected between the first node and an anode electrode of the organic light-emitting diode element.
5. The organic light-emitting diode display device as claimed in claim 4 , wherein
the driving device includes an N-type MOS-FET;
the switch elements include one of a P-type MOS-FET and an N-type MOS-FET;
the first switch element includes a gate electrode connected to the first scan line, a drain electrode connected to the data line, and a source electrode connected to the first node;
the driving device includes a gate electrode connected to the first node, a drain electrode connected to the driving voltage source, and a source electrode connected to an anode electrode of the organic light-emitting diode element; and
the second switch element includes a gate electrode connected to the second scan line, a source electrode connected to the reference voltage source, and a drain electrode connected to the first node.
6. The organic light-emitting diode display device as claimed in claim 1 , wherein
the organic light-emitting diode element is connected between the driving voltage source and the driving device; and
the storage capacitor is connected between the first node and the ground voltage source.
7. The organic light-emitting diode display device as claimed in claim 6 , wherein
the driving device includes a P-type MOS-FET;
the switch elements include one of a P-type MOS-FET and an N-type MOS-FET;
the first switch element includes a gate electrode connected to the first scan line, a source electrode connected to the data line, and a drain electrode connected to the first node;
the driving device includes a gate electrode connected to the first node, a source electrode connected to a cathode electrode of the organic light-emitting diode element, and a drain electrode connected to the ground voltage source; and
the second switch element includes a gate electrode connected to the second scan line, a source electrode connected to the reference voltage source, and a drain electrode connected to the first node.
8. The organic light-emitting diode display device as claimed in claim 1 , wherein the storage capacitor is connected between the first node and a cathode electrode of the organic light-emitting diode element.
9. The organic light-emitting diode display device as claimed in claim 8 , wherein
the driving device includes an N-type MOS-FET;
the switch elements include one of a P-type MOS-FET and an N-type MOS-FET;
the first switch element includes a gate electrode connected to the first scan line, a drain electrode connected to the data line, and a source electrode connected to the first node;
the driving device includes a gate electrode connected to the first node, a drain electrode connected to a cathode electrode of the organic light-emitting diode element, and a source electrode connected to the ground voltage source; and
the second switch element includes a gate electrode connected to the second scan line, a source electrode connected to the reference voltage source, and a drain electrode connected to the first node.
10. An organic light-emitting diode display device, comprising:
a driving voltage source providing a driving voltage;
a ground voltage source providing a ground voltage;
an organic light-emitting diode element;
a scan line receiving a first scanning signal and a second scanning signal sequentially at an interval;
a data line crossing the scan line and receiving a data voltage and a reset voltage;
a switch element turned-on by the first scanning signal during a first period to supply the data voltage to a first node, and then turned-on by the second scanning signal during a second period to supply the reset voltage to the first node;
a driving device allowing a current to flow into the organic light-emitting diode element in accordance with the data voltage supplied to the first node and turned-off by the reset voltage supplied to the first node; and
a storage capacitor maintaining the voltage at the first node.
11. The organic light-emitting diode display device as claimed in claim 10 , wherein
the organic light-emitting diode element is connected between the driving device and the ground voltage source; and
the storage capacitor is connected between the driving voltage source and the first node.
12. The organic light-emitting diode display device as claimed in claim 11 , wherein
the driving device includes a P-type MOS-FET;
the switch element includes one of a P-type MOS-FET and an N-type MOS-FET;
the switch element includes a gate electrode connected to the scan line, a source electrode connected to the data line, and a drain electrode connected to the first node; and
the driving device includes a gate electrode connected to the first node, a source electrode connected to the driving voltage source, and a drain electrode connected to an anode electrode of the organic light-emitting diode element.
13. The organic light-emitting diode display device as claimed in claim 11 , wherein
the driving device includes an N-type MOS-FET;
the switch element includes one of a P-type MOS-FET and an N-type MOS-FET;
the switch element includes a gate electrode connected to the scan line, a drain electrode connected to the data line, and a source electrode connected to the first node; and
the driving device includes a gate electrode connected to the first node, a drain electrode connected to the driving voltage source, and a source electrode connected to an anode electrode of the organic light-emitting diode element.
14. The organic light-emitting diode display device as claimed in claim 10 , wherein
the organic light-emitting diode element is connected between the driving device and the ground voltage source; and
the storage capacitor is connected between the first node and an anode electrode of the organic light-emitting diode element.
15. The organic light-emitting diode display device as claimed in claim 14 , wherein
the driving device includes a P-type MOS-FET;
the switch element includes one of a P-type MOS-FET and an N-type MOS-FET;
the switch element includes a gate electrode connected to the scan line, a drain electrode connected to the data line, and a source electrode connected to the first node; and
the driving device includes a gate electrode connected to the first node, a drain electrode connected to the driving voltage source, and a source electrode connected to an anode electrode of the organic light-emitting diode element.
16. The organic light-emitting diode display device as claimed in claim 10 , wherein
the organic light-emitting diode element is connected between the driving voltage source and the driving device; and
the storage capacitor is connected between the first node and the ground voltage source.
17. The organic light-emitting diode display device as claimed in claim 16 , wherein
the driving device includes a P-type MOS-FET;
the switch element includes one of a P-type MOS-FET and an N-type MOS-FET;
the switch element includes a gate electrode connected to the scan line, a source electrode connected to the data line, and a drain electrode connected to the first node; and
the driving device includes a gate electrode connected to the first node, a source electrode connected to a cathode electrode of the organic light-emitting diode element, and a drain electrode connected to the ground voltage source.
18. The organic light-emitting diode display device as claimed in claim 10 , wherein
the organic light-emitting diode element is connected between the driving voltage source and the driving device; and
the storage capacitor is connected between the first node and a cathode electrode of the organic light-emitting diode element.
19. The organic light-emitting diode display device as claimed in claim 18 , wherein
the driving device includes a P-type MOS-FET;
the switch element includes one of a P-type MOS-FET and an N-type MOS-FET;
the switch element includes a gate electrode connected to the scan line, a source electrode connected to the data line, and a drain electrode connected to the first node; and
the driving device includes a gate electrode connected to the first node, a source electrode connected to a cathode electrode of the organic light-emitting diode element, and a drain electrode connected to the ground voltage source.
20. The organic light-emitting diode display device as claimed in claim 14 , wherein
the driving device includes an N-type MOS-FET;
the switch element includes one of a P-type MOS-FET and an N-type MOS-FET;
the switch element includes a gate electrode connected to the scan line, a drain electrode connected to the data line, and a source electrode connected to the first node; and
the driving device includes a gate electrode connected to the first node, a drain electrode connected to the driving voltage source, and a source electrode connected to an anode electrode of the organic light-emitting diode element.
21. The organic light-emitting diode display device as claimed in claim 16 , wherein
the driving device includes an N-type MOS-FET;
the switch element includes one of a P-type MOS-FET and an N-type MOS-FET;
the switch element includes a gate electrode connected to the scan line, a drain electrode connected to the data line, and a source electrode connected to the first node; and
the driving device includes a gate electrode connected to the first node, a drain electrode connected to the driving voltage source, and a source electrode connected to an anode electrode of the organic light-emitting diode element.
22. The organic light-emitting diode display device as claimed in claim 18 , wherein
the driving device includes an N-type MOS-FET;
the switch element includes one of a P-type MOS-FET and an N-type MOS-FET;
the switch element includes a gate electrode connected to the scan line, a drain electrode connected to the data line, and a source electrode connected to the first node; and
the driving device includes a gate electrode connected to the first node, a drain electrode connected to the driving voltage source, and a source electrode connected to an anode electrode of the organic light-emitting diode element.
23. An organic light-emitting diode display device, comprising:
a driving voltage source providing a driving voltage;
a ground voltage source providing a ground voltage;
a reference voltage source providing a reference voltage;
an organic light-emitting diode element;
a capacitor connected between a first node and a second node;
a first scan line receiving a first scanning signal and a second scanning signal;
a second scan line receiving a first scanning signal and a second scanning signal sequentially at an interval;
a data line crossing the scan lines and receiving a data voltage and a reset voltage;
a first a switch element turned-on by a signal of the first scan line during a first period to supply the reference voltage to the second node, and then turned-off during a second period, and turned-on by a signal of the first scan line during a third period to supply the reference voltage to the second node;
a first b switch element turned-on by a signal of the first scan line during the first period to supply the data voltage to the first node, and then turned-off by a signal of the first scan line during the second period, and turned-on by a signal of the first scan line during the third period to supply the reset voltage to the first node;
a driving device allowing a current to flow into the organic light-emitting diode element in accordance with the data voltage supplied to the first node, and turned-off by the reset voltage supplied to the first node; and
a second switch element turned-off by a signal of the second scan line for the first period, and then turned-on for the second time to supply one of the driving voltage and the reference voltage to the second node, and turned-off for the third period.
24. The organic light-emitting diode display device as claimed in claim 23 , wherein the organic light-emitting diode element is connected between the driving device and the ground voltage source.
25. The organic light-emitting diode display device as claimed in claim 24 , wherein
the driving device includes a P-type MOS-FET;
the switch elements include one of a P-type MOS-FET and an N-type MOS-FET;
the first a switch element includes a gate electrode connected to the first scan line, a source electrode connected to the reference voltage source, and a drain electrode connected to the second node;
the first b switch element includes a gate electrode connected to the first scan line, a source electrode connected to the data line, and a drain electrode connected to the first node;
the driving device includes a gate electrode connected to the first node, a source electrode connected to the driving voltage source, and a drain electrode connected to an anode electrode of the organic light-emitting diode element; and
the second switch element includes a gate electrode connected to the second scan line, a source electrode connected to the driving voltage source, and a drain electrode connected to the second node.
26. The organic light-emitting diode display device as claimed in claim 23 , wherein the organic light-emitting diode element is connected between the driving voltage source and the driving device.
27. The organic light-emitting diode display device as claimed in claim 26 , wherein
the driving device includes an N-type MOS-FET;
the switch elements include one of a P-type MOS-FET and an N-type MOS-FET;
the first a switch element includes a gate electrode connected to the first scan line, a source electrode connected to the reference voltage source, and a drain electrode connected to the second node;
the first b switch element includes a gate electrode connected to the first scan line, a source electrode connected to the data line, and a drain electrode connected to the first node;
the driving device includes a gate electrode connected to the first node, a source electrode connected to a cathode electrode of the organic light-emitting diode element, and a drain electrode connected to the ground voltage source; and
the third switch element includes a gate electrode connected to the second scan line, a source electrode connected to the second node, and a drain electrode connected to the ground voltage source.
28. The organic light-emitting diode display device as claimed in claim 25 , wherein
the driving device includes an N-type MOS-FET;
the switch elements include one of a P-type MOS-FET and an N-type MOS-FET;
the first a switch element includes a gate electrode connected to the non-inverted scan line, a source electrode connected to the reference voltage source, and a drain electrode connected to the second node;
the first b switch element includes a gate electrode connected to the non-inverted scan line, a drain electrode connected to the data line, and a source electrode connected to the first node;
the driving device includes a gate electrode connected to the first node, a drain electrode connected to the driving voltage source, and a source electrode connected to an anode electrode of the organic light-emitting diode element; and
the third switch element includes a gate electrode connected to the inverted scan line, a drain electrode connected to the driving voltage source, and a source electrode connected to the second node.
29. The organic light-emitting diode display device as claimed in claim 27 , wherein
the driving device includes an N-type MOS-FET;
the switch elements include one of a P-type MOS-FET and an N-type MOS-FET;
the first a switch element includes a gate electrode connected to the non-inverted scan line, a drain electrode connected to the reference voltage source, and a source electrode connected to the second node;
the first b switch element includes a gate electrode connected to the non-inverted scan line, a drain electrode connected to the data line, and a source electrode connected to the first node;
the driving device includes a gate electrode connected to the first node, a drain electrode connected to the driving voltage source, and a source electrode connected to an anode electrode of the organic light-emitting diode element; and
the third switch element includes a gate electrode connected to the inverted scan line, a drain electrode connected to the driving voltage source, and a source electrode connected to the second node.
30. The organic light-emitting diode display device as claimed in claim 28 , wherein
at least two switch elements among the driving device and the switch elements have opposite channel characteristics, and
voltages of the scanning signals supplied to the switch elements having different channel characteristics are reversed each other.
31. The organic light-emitting diode display device as claimed in claim 29 , wherein
at least two switch elements among the driving device and the switch elements have opposite channel characteristics, and
voltages of the scanning signals supplied to the switch elements having different channel characteristics are reversed each other.
32. A method of driving an organic light-emitting diode display device, including an organic light-emitting diode element, a driving voltage source providing a driving voltage, a ground voltage source providing a ground voltage, a driving device adjusting a current of the organic light-emitting diode element in accordance with a voltage of a first node, and to which the driving voltage is supplied via a second node, a storage capacitor connected between the first node and the second node, a data line receiving a data voltage, and a scan line crossing the data line and receiving a scanning signal, the method comprises:
supplying a first scanning signal to a first scan line during a first period to turn-on a first switch element connected between the data line and the first node to supply the data voltage to the first node; and
turning-off the first switch element, and supplying a second scanning signal to a second scan line during a second period to turn-on a second switch element connected between a reference voltage source generating a reference voltage that is capable of turning-off the driving device and the first node to supply the reference voltage to the first node.
33. A method of driving an organic light-emitting diode display device, including an organic light-emitting diode element, a driving voltage source providing a driving voltage, a ground voltage source providing a ground voltage, a driving device adjusting a current of the organic light-emitting diode element in accordance with a voltage of a first node, and to which the driving voltage is supplied via a second node, a storage capacitor connected between the first node and the second node, a data line receiving a data voltage, and a scan line crossing the data line and receiving a scanning signal, the method comprises:
supplying the data voltage to the data line during a first period, and then supplying a reset voltage that is capable of turning-off the driving device to the data line during a second period;
supplying a first scanning signal to the scan line during the first period to turn-on a first switch element connected between the data line and the first node to supply the data voltage to a first node; and
supplying a second scanning signal to the scan line during the second period to supply the reset voltage to the first node.
34. A method of driving an organic light-emitting diode display device, including an organic light-emitting diode element, a driving voltage source providing a driving voltage, a ground voltage source providing a ground voltage, a driving device adjusting a current of the organic light-emitting diode element in accordance with a voltage of a first node, and to which the driving voltage is supplied via a second node, and a storage capacitor connected between the first node and the second node, the method comprises:
sequentially supplying a data voltage, and a reset voltage that is capable of turning-off the driving device to the data line;
supplying a scanning voltage of a first scanning signal to a first scan line during a first period to turn-on a first a switch element connected between a reference voltage source generating a reference voltage and the second node to charge the reference voltage into the second node and, at the same time turning-on a first b switch element connected between the data line and the first node to charge the data voltage into the first node, and supplying a non-scanned voltage of a first inversed scanning signal generated in a reverse phase against the first scanning signal to a second scan line to turn-off a second switch element connected between the driving voltage source and the second node;
supplying a non-scanned voltage of the first scanning signal to the first scan line during a second period to turn-off the first a and first b switch elements and, at the same time supplying a scanning voltage of the first inversed scanning signal to the second scan line to turn-on the second switch element to supply supplying one of the driving voltage and the ground voltage to the second node; and
supplying a scanning voltage of a second scanning signal to the first scan line during a third period to turn-on the first a and first b switch elements to supply the reset voltage to the first node, and supplying the reference voltage to the second node and, at the same time supplying a non-scanned voltage of a second inversed scanning signal generated in a reverse phase against the second scanning signal to the second scan line to turn-off the second switch element.