Pixel and organic light emitting display device including the pixel
A pixel includes a first transistor connected between a data line and a first node, a second transistor including a second electrode connected to a second node, and a gate electrode connected to the first node, a third transistor connected between a reference power supply and the first node, a fourth transistor including a first electrode connected to a first power supply, and a second electrode connected to a first electrode of the second transistor, a capacitor including a first electrode connected to the first node, and a second electrode connected to the second node, an organic light emitting diode connected between the second node and a second power supply, a fifth transistor connected to an anode of the organic light emitting diode, and a sixth transistor including a first electrode connected to the fifth transistor, and a second electrode connected to an initialization power supply.
1. A pixel, comprising:
a first transistor comprising a first electrode connected to a data line, and a second electrode connected to a first node;
a second transistor comprising a first electrode, a second electrode connected to a second node, and a gate electrode connected to the first node for receiving a data signal at the gate electrode from the data line through the first transistor;
a third transistor comprising a first electrode connected to a reference power supply, and a second electrode connected to the first node;
a fourth transistor comprising a first electrode connected to a first power supply, and a second electrode connected to the first electrode of the second transistor to connect the second transistor to the first power supply to supply a voltage of the first power supply to the second transistor through the fourth transistor;
a capacitor comprising a first electrode connected to the first node, and a second electrode connected to the second node;
an organic light emitting diode connected between the second node and a second power supply;
a fifth transistor connected to an anode of the organic light emitting diode; and
a sixth transistor comprising a first electrode connected to the fifth transistor, and a second electrode connected to an initialization power supply.
2. The pixel of claim 1 , wherein the fifth transistor comprises a first electrode connected to the anode of the organic light emitting diode, a second electrode connected to the sixth transistor, and a gate electrode connected to an ith light emission control line, where i is a natural number.
3. The pixel of claim 2 , wherein the third transistor further comprises a gate electrode connected to an (i−1)th scan line, and
wherein the sixth transistor further comprises a gate electrode connected to an (i+1)th scan line.
4. The pixel of claim 3 , wherein the second transistor is configured to maintain an off state during a first period, and
wherein the fifth transistor and the sixth transistor are configured to maintain an on state during a second period.
5. The pixel of claim 4 , wherein the third transistor and the fourth transistor are configured to maintain an on state during a third period.
6. The pixel of claim 5 , wherein the third period is repeated at least twice at a time interval for a 1 frame period.
7. The pixel of claim 5 , wherein the first transistor is configured to maintain an on state during a fourth period, and
wherein the fifth transistor and the sixth transistor are configured to maintain an on state during a fifth period.
8. The pixel of claim 2 , further comprising a seventh transistor connected between the fifth transistor and the initialization power supply.
9. The pixel of claim 8 , wherein the third transistor further comprises a gate electrode connected to an (i−2)th scan line,
wherein the sixth transistor further comprises a gate electrode connected to an (i−1)th scan line, and
wherein the seventh transistor comprises a first electrode connected to the first electrode of the sixth transistor, a second electrode connected to the second electrode of the sixth transistor, and a gate electrode connected to an ith scan line.
10. The pixel of claim 9 , wherein the fifth transistor and the sixth transistor are configured to maintain an on state, and wherein the seventh transistor is configured to maintain an off state, during a second period, and
wherein a voltage of the initialization power supply is transmitted to the second node during the second period.
11. An organic light emitting display device, comprising:
a plurality of pixels comprising n scan lines, n light emission control lines, and m data lines, where n and m are natural numbers that are greater than or equal to 2;
a scan driver for supplying scan signals to the scan lines, and for supplying light emission control signals to the light emission control lines; and
a data driver for supplying data signals to the data lines,
wherein a pixel connected to an ith scan line, to an ith light emission control line, and to a jth data line, where i is a natural number that is less than or equal to n, and where j is a natural number that is less than or equal to m, comprises:
a first transistor connected between the jth data line and a first node, and configured to be turned on in response to a scan signal supplied to the ith scan line;
a second transistor comprising a first electrode, a second electrode connected to a second node, and a gate electrode connected to the first node for receiving a data signal at the gate electrode from the jth data line through the first transistor;
a third transistor comprising a first electrode connected to a reference power supply, and a second electrode connected to the first node;
a fourth transistor comprising a first electrode connected to a first power supply, and a second electrode connected to the first electrode of the second transistor to connect the second transistor to the first power supply to supply a voltage of the first power supply to the second transistor through the fourth transistor, wherein the fourth transistor is configured to be turned on in response to a light emission control signal supplied to the ith light emission control line;
a capacitor comprising a first electrode connected to the first node, and a second electrode connected to the second node;
an organic light emitting diode connected between the second node and a second power supply;
a fifth transistor connected to an anode of the organic light emitting diode; and
a sixth transistor comprising a first electrode connected to the fifth transistor, and a second electrode connected to an initialization power supply.
12. The organic light emitting display device of claim 11 , wherein the fifth transistor comprises a first electrode connected to the anode of the organic light emitting diode, a second electrode connected to the sixth transistor, and a gate electrode connected to the ith light emission control line.
13. The organic light emitting display device of claim 12 , wherein the third transistor further comprises a gate electrode connected to an (i−1)th scan line, and
wherein the sixth transistor further comprises a gate electrode connected to an (i+1)th scan line.
14. The organic light emitting display device of claim 13 , wherein the (i−1)th scan line is configured to receive a scan signal during a first period and a third period,
wherein the ith scan line is configured to receive a scan signal during a fourth period, and
wherein the (i+1)th scan line is configured to receive a scan signal during a second period and a fifth period.
15. The organic light emitting display device of claim 14 , wherein the ith light emission control line is configured to receive a light emission control signal during the third period and a sixth period.
16. The organic light emitting display device of claim 15 , wherein a voltage of the second node is compensated corresponding to a threshold voltage of the second transistor whenever the third transistor and the fourth transistor are turned on after the second period ends.
17. The organic light emitting display device of claim 12 , wherein the pixel further comprises a seventh transistor comprising a first electrode connected to the first electrode of the sixth transistor, a second electrode connected to the second electrode of the sixth transistor, and a gate electrode connected to the ith scan line.
18. The organic light emitting display device of claim 17 , wherein the third transistor further comprises a gate electrode connected to an (i−2)th scan line, and
wherein the sixth transistor further comprises a gate electrode connected to an (i−1)th scan line.
19. The organic light emitting display device of claim 18 , wherein the (i−2)th scan line is configured to receive a scan signal during a first period and a third period,
wherein the (i−1)th scan line is configured to receive a scan signal during a second period, and
wherein the ith scan line is configured to receive a scan signal during a fourth period.
20. The organic light emitting display device of claim 19 , wherein the ith light emission control line is configured to receive a light emission control signal during the first period, the second period and the third period, and
wherein a voltage of the second node is compensated corresponding to a threshold voltage of the second transistor whenever the third transistor and the fourth transistor are turned on after the second period ends.
21. A pixel, comprising:
a first transistor connected between a data line and a first node;
a second transistor comprising a first electrode, a second electrode connected to a second node, and a gate electrode connected to the first node for receiving a data signal at the gate electrode from the data line through the first transistor;
a third transistor coupled between the first node and a reference power supply, and comprising a gate electrode connected to a control line;
a fourth transistor comprising a first electrode connected to a first power supply, and a second electrode connected to the first electrode of the second transistor to connect the second transistor to the first power supply to supply a voltage of the first power supply to the second transistor through the fourth transistor;
a capacitor connected between the first node and the second node;
an organic light emitting diode connected between the second node and a second power supply; and
a fifth transistor comprising a first electrode connected to an anode of the organic light emitting diode, and a second electrode connected to an initialization power supply.
22. The pixel of claim 21 , wherein the first transistor comprises a first electrode connected to the data line, a second electrode connected to the first node, and a gate electrode connected to an ith scan line, i being a natural number,
wherein the third transistor comprises a first electrode connected to the reference power supply, and a second electrode connected to the first node, and
wherein the fourth transistor comprises a gate electrode connected to a light emission control line.
23. The pixel of claim 22 , wherein the fifth transistor further comprises a gate electrode connected to an (i+2)th scan line.
24. The pixel of claim 23 , wherein the fourth transistor is configured to maintain an off state during a first period and a second period, and
wherein the third transistor and the fifth transistor are configured to maintain an on state during the second period.
25. The pixel of claim 24 , wherein the third transistor and the fourth transistor are configured to maintain an on state during a third period.