Pixel and organic light emitting display using the same
View Patent ↗A pixel of a simplified configuration, and an organic light emitting display using the same are disclosed. The pixel includes an organic light emitting diode; a first transistor connected with a scan line and a data line and turned on when a scan signal is supplied to the scan lines; a storage capacitor having one terminal connected to an electrode of the first transistor and the other terminal connected to a reset line; and a second transistor for controlling an electric current that flows from a first power source to a second power source through the organic light emitting diode according to a voltage charged in the storage capacitor, wherein the second transistor is turned-off when a reset signal is supplied to the reset line.
1. An organic light emitting display, comprising:
a scan driver configured to sequentially supply a scan signal to a plurality of scan lines during a plurality of subframe periods during one frame and to supply a reset signal to a plurality of reset lines;
a data driver configured to apply data signals to a plurality of data lines such that the data signal is synchronized with the scan signal;
a plurality of pixels configured to emit red light each connected to the scan lines and the reset lines;
a plurality of pixels configured to emit green light each connected to the scan lines and the reset lines; and
a plurality of pixels configured to emit blue light each connected to the scan lines and the reset lines;
wherein the scan driver is configured to control the duration of light emission periods, and the duration of the emission period for each of the pixels is based on the color of the light emitted by the pixel, and
wherein each of the pixels comprises:
an organic light emitting diode,
a first transistor having a gate electrode connected to a scan line and a first electrode connected to a data line, the first transistor configured to be turned on when a scan signal is supplied to the scan line,
a second transistor having a gate electrode connected to a second electrode of the first transistor, a first electrode connected to a first power source and a second electrode connected to the organic light emitting diode, the second transistor configured to control an electric current flowing from the first power source to a second power source through the organic light emitting diode according to a data voltage from the data line, and
a storage capacitor having one terminal connected to the second electrode of the first transistor and the gate electrode of the second transistor, and another terminal connected to a reset line,
wherein if a reset signal is supplied to the reset line, the storage capacitor couples the reset signal to the second transistor, and in response to the coupled reset signal, the second transistor is turned off.
2. The organic light emitting display according to claim 1 , wherein the scan driver is configured to control the duration of reset signal periods, and the duration of the reset signal period for each of the pixels is based on the color of the light emitted by the pixel.
3. The organic light emitting display according to claim 1 , wherein durations of the light emission periods of the pixels correspond to the durations of the reset periods of the pixels.
4. The organic light emitting display according to claim 3 , wherein the sums of the duration of the light emission period and the duration of the reset period of each of the pixels is substantially the same.
5. The organic light emitting display according to claim 1 , wherein the duration of the light emission period of the blue pixels is the shortest period, and the duration of the light emission period of the green pixels is the longest period.
6. The organic light emitting display according to claim 1 , wherein the duration of the light emission period of each of the pixels is based on an expected lifetime of the pixels.
7. The organic light emitting display according to claim 1 , wherein the reset signal is capacitively coupled to each of the pixels.
8. The organic light emitting display according to claim 1 , wherein the storage capacitor is configured to store a data signal which controls the light emission of the pixel.
9. An organic light emitting display, comprising:
a scan driver configured to sequentially supply a scan signal to a plurality of scan lines during a plurality of subframe periods during one frame and to supply a reset signal to a plurality of reset lines;
a data driver configured to apply data signals to a plurality of data lines such that the data signal is synchronized with the scan signal;
a plurality of pixels configured to emit red light each connected to the scan lines and the reset lines;
a plurality of pixels configured to emit green light each connected to the scan lines and the reset lines; and
a plurality of pixels configured to emit blue light each connected to the scan lines and the reset lines;
wherein the scan driver is configured to control the duration of light emission periods, and the duration of the emission period for each of the pixels is based on the color of the light emitted by the pixel, and
wherein each of the pixels comprises:
an organic light emitting diode,
a transistor, configured to control an electric current flowing through the organic light emitting diode according to a data voltage, and
a storage capacitor having one terminal connected to the transistor, and another terminal connected to a reset line,
wherein if a reset signal is supplied to the reset line, the storage capacitor couples the reset signal to the transistor, and in response to the coupled reset signal, the transistor is turned off.
10. The organic light emitting display according to claim 9 , wherein the scan driver is configured to control the duration of reset signal periods, and the duration of the reset signal period for each of the pixels is based on the color of the light emitted by the pixel.
11. The organic light emitting display according to claim 9 , wherein durations of the light emission periods of the pixels correspond to the durations of the reset periods of the pixels.
12. The organic light emitting display according to claim 11 , wherein the sums of the duration of the light emission period and the duration of the reset period of each of the pixels is substantially the same.
13. The organic light emitting display according to claim 9 , wherein the duration of the light emission period of the blue pixels is the shortest period, and the duration of the light emission period of the green pixels is the longest period.
14. The organic light emitting display according to claim 9 , wherein the duration of the light emission period of each of the pixels is based on an expected lifetime of the pixels.
15. The organic light emitting display according to claim 9 , wherein the reset signal is capacitively coupled to each of the pixels.
16. An organic light emitting display, comprising:
a scan driver configured to sequentially supply a scan signal to a plurality of scan lines during a plurality of subframe periods during one frame and to supply a reset signal to a plurality of reset lines;
a data driver configured to apply data signals to a plurality of data lines such that the data signal is synchronized with the scan signal;
a first plurality of pixels configured to emit light of a first color, each first pixel connected to the scan lines and the reset lines; and
a second plurality of pixels configured to emit light of a second color, each second pixel connected to the scan lines and the reset lines,
wherein the scan driver is configured to control the duration of light emission periods, and the duration of the emission period for each of the pixels is based on the color of the light emitted by the pixel, and
wherein each of the pixels comprises:
an organic light emitting diode,
a transistor, configured to control an electric current flowing through the organic light emitting diode according to a data voltage, and
a storage capacitor having one terminal connected to the transistor, and another terminal connected to a reset line,
wherein if a reset signal is supplied to the reset line, the storage capacitor couples the reset signal to the transistor, and in response to the coupled reset signal, the transistor is turned off.
17. The organic light emitting display according to claim 16 , wherein the scan driver is configured to control the duration of reset signal periods, and the duration of the reset signal period for each of the pixels is based on the color of the light emitted by the pixel.
18. The organic light emitting display according to claim 16 , wherein durations of the light emission periods of the pixels correspond to the durations of the reset periods of the pixels.
19. The organic light emitting display according to claim 18 , wherein the sums of the duration of the light emission period and the duration of the reset period of each of the pixels is substantially the same.
20. The organic light emitting display according to claim 16 , wherein the duration of the light emission period of the blue pixels is the shortest period, and the duration of the light emission period of the green pixels is the longest period.
21. The organic light emitting display according to claim 16 , wherein the duration of the light emission period of each of the pixels is based on an expected lifetime of the pixels.
22. The organic light emitting display according to claim 16 , wherein the reset signal is capacitively coupled to each of the pixels.