Display device and driving method thereof
In a display device and driving method thereof, a display device includes: a display panel including a pixel, the pixel including a light-emitting device (LED), the pixel receiving a data signal (DS) corresponding to a gate signal, the LED emitting light by a driving current flowing from a first power voltage to a second power voltage in response to the DS, the pixel receiving a reset voltage at least once after receiving one DS and before receiving a next DS, a data driver circuit supplying the DS to the pixel through a data line, a gate driver circuit for: supplying the gate signal to the pixel through a gate line, and outputting a light emission control signal for controlling supply of one of the reset voltage and the first power voltage to the LED, and a timing controller controlling the data driver circuit and the gate driver circuit.
1. A display device, comprising:
a display panel comprising a pixel comprising a light-emitting device, the pixel being driven in a first frequency mode or a second frequency mode;
a data driver circuit configured to supply a data signal to the pixel through a data line; and
a gate driver circuit configured to supply at least one gate signal and at least one light emission control signal including a first light emission control signal,
wherein the light-emitting device is configured to emit light by a driving current flowing from a first power voltage to a second power voltage in response to the data signal, the first power voltage and the second power voltage being applied to different portions of the light-emitting device,
wherein the pixel is configured to receive a reset signal at least once between data signals received by the pixel at different times, and
wherein the first light emission control signal is supplied based on a first time period.
2. The display device of claim 1 , further comprising: a timing controller comprising a first frequency driving mode circuit configured to perform the first frequency mode, and a second frequency driving mode circuit configured to perform the second frequency mode.
3. The display device of claim 2 , wherein the timing controller is configured to store information on the first time period, and adjust a timing at which the first light emission control signal is output based on the stored information on the first time period.
4. The display device of claim 1 , wherein the at least one light emission control signal further comprises a second light emission control signal different from the first light emission control signal, and
wherein the first time period is a time difference between the first light emission control signal and the second light emission control signal.
5. The display device of claim 1 , wherein the pixel further comprises: a first transistor configured to supply the driving current to the light-emitting device, in response to the data signal; and
a second transistor electrically connected between the first transistor and the light-emitting device.
6. The display device of claim 5 , wherein the at least one light emission control signal further comprises a second light emission control signal different from the first light emission control signal,
wherein the second transistor is controlled by the second light emission control signal.
7. The display device of claim 6 , wherein the pixel further comprises:
a third transistor configured to supply the data signal to the first transistor, in response to a first gate signal;
a fourth transistor configured to supply the first power voltage to the first transistor, in response to a first light emission control signal;
a fifth transistor configured to cause the first transistor to be in a diode connection, in response to a second gate signal;
a capacitor configured to hold the data signal supplied to the first transistor; and
a sixth transistor configured to transmit an initialization voltage for initializing the capacitor and the anode electrode to the capacitor, in response to a second gate signal.
8. The display device according to claim 7 , wherein a period in which the second transistor is turned on overlaps a period in which the third transistor is turned on.
9. The display device according to claim 7 , wherein after the first time period elapses after the second transistor is turned on, the fourth transistor is turned on, and the first time period is adjusted according to a rate at which a voltage of the anode electrode of the light-emitting device increases during a refresh period or reset period.
10. The display device according to claim 7 , wherein the reset signal is supplied to the light-emitting device through the data line, the third transistor, and the second transistor.
11. The display device according to claim 7 , wherein an initialization voltage for initializing at least one of the capacitor and an anode electrode of the light-emitting device is supplied to the at least one the capacitor and the anode electrode through the sixth transistor.
12. The display device according to claim 7 , wherein the fifth transistor and the sixth transistor are turned off during a refresh period.
13. The display device according to claim 1 , wherein the light-emitting device comprises:
an anode electrode;
a cathode electrode; and
a light-emitting layer between the anode electrode and the cathode electrode,
wherein the first power voltage or the reset signal is transmitted to the anode electrode, and the second power voltage is transmitted to the cathode electrode.
14. The display device according to claim 1 , wherein while the data signal is maintained, the reset signal and the first power voltage are repeatedly supplied to the light-emitting device at least two or more times.
15. The display device of claim 1 , wherein each of the first frequency mode and the second frequency mode comprises:
at least one light emission period, and
at least one non-light emission period, and
wherein, in the first frequency mode and the second frequency mode, respective numbers of times that the light emission period and the non-light emission period are generated are the same.
16. The display device of claim 1 , wherein, when the first time period elapses after the reset signal is transmitted to the light-emitting device, the first power voltage is transferred to the light-emitting device.
17. The display device according to claim 16 , wherein the first time period is adjusted based on a rate at which voltage of the anode electrode of the light-emitting device increases during a refresh period or reset period.
18. The display device according to claim 17 , wherein the rate at which the voltage of the anode electrode increases during the refresh period is greater than the rate at which the voltage of the anode electrode increases during the reset period.
19. The display device according to claim 17 , wherein when the rate at which the voltage of the anode electrode increases during the refresh period is less than the rate at which the voltage of the anode electrode increases during the reset period, the first time period is set longer.
20. The display device according to claim 17 , wherein the first time period set when the rate at which the voltage of the anode electrode increases during the refresh period is faster than the rate at which the voltage of the anode electrode increases during the reset period is shorter than the first time period set when the rate at which the voltage of the anode electrode increases during the refresh period is slower than the rate at which the voltage of the anode electrode increases during the reset period.