Display device and driving method thereof

1. A display device, comprising:

a display panel having a plurality of data lines and a plurality of gate lines crossing the data lines, the gate lines including a plurality of odd-numbered gate lines and a plurality of even-numbered gate lines;

a timing controller to generate a gate output enable signal;

a gate output enable signal division circuit to extract odd-numbered high logic periods of the gate output enable signal to output a first gate output enable signal and to extract even-numbered high logic periods of the gate output enable signal to output a second gate output enable signal; and

a gate driver to supply a first gate pulse to at least one of the odd-numbered gate lines in response to the first gate output enable signal and a second gate pulse to at least one of the even-numbered gate lines in response to the second gate output enable signal,

wherein the timing controller is also configured to generate a gate shift clock signal, and

wherein the first and second gate pulses overlap each other for a period shorter than one cycle of the gate shift clock signal.

2. The display device of claim 1 ,

wherein at least one of the first and second gate pulses has a width that is longer than one cycle of the gate shift clock signal but shorter than two cycles of the gate shift clock signal.

3. The display device of claim 1 , wherein the gate output enable signal division circuit includes:

a 2-frequency divider circuit to divide the frequency of the gate output enable signal by 2and to output a 2-frequency divided gate output enable signal;

a first inverter to invert the phase of the 2-frequency divided gate output enable signal;

a first AND operator to receive the 2-frequency divided gate output enable signal and the gate output enable signal as inputs and to output the first gate output enable signal; and

a second AND operator to receive the inverted 2-frequency divided gate output enable signal and the gate output enable signal as inputs and to output the second gate output enable signal.

4. The display device of claim 1 , wherein the gate driver includes:

a shift register to receive a gate start pulse and the gate shift clock signal from the timing controller, and to output a first output and a second output;

a second inverter to invert the phase of the first gate output enable signal and to output the inverted first gate output enable signal;

a third inverter to invert the phase of the second gate output enable signal and to output the inverted second gate output enable signal;

a third AND operator to receive the first output from the shift register and the inverted first gate output enable signal and to generate a first AND output;

a fourth AND gate to receive the second output from the shift register and the inverted second gate output enable signal and to generate a second AND output; and

a level shifter to generate the first gate pulse based on the first AND output and the second gate pulse based on the second AND output.

5. The display device of claim 4 , wherein the gate driver further includes a buffer unit to amplify the first and second gate pulses, and to supply the amplified first gate pulse to the at least one of the odd-numbered gate lines and the amplified second gate pulse to the at least one of the even-numbered gate lines.

6. The display device of claim 1 , wherein the gate output enable signal division circuit is included in the gate driver.

7. The display device of claim 1 , wherein the gate output enable signal division circuit is included in the timing controller.

8. A display device, comprising:

a display panel having a plurality of data lines and a plurality of gate lines crossing the data lines, the gate lines including a plurality of odd-numbered gate lines and a plurality of even-numbered gate lines;

a timing controller to generate a gate output enable signal and a gate shift clock signal;

a gate output enable signal division circuit to generate a first gate output enable signal and a second gate output enable signal based on the gate output enable signal; and

a gate IC to supply a first gate pulse to at least one of the odd-numbered gate lines based on the first gate output enable signal and a second gate pulse to at least one of the even-numbered gate lines based on the second gate output enable signal,

wherein at least one of the first and second gate pulses has a width longer than one cycle of the gate shift clock signal and shorter than two cycles of the gate shift clock signal, and

wherein the first and second gate pulses overlap each other for a period shorter than one cycle of the gate shift clock signal.

9. The display device of claim 8 , wherein the timing controller is also configured to generate a gate start pulse having a width longer than one cycle of the gate shift clock and shorter than two cycles of the gate shift clock signal, and

wherein the gate IC is configured to receive the gate start pulse and supply the first and second gate pulses based on the gate start pulse.

10. The display device of claim 8 , wherein the gate output enable signal division circuit includes:

a 2-frequency divider circuit to divide the frequency of the gate output enable signal by 2and to generate a 2-frequency divided gate output enable signal;

a first inverter to invert the phase of the 2-frequency divided gate output enable signal;

a first AND operator to receive the 2-frequency divided gate output enable signal and the gate output enable signal as inputs and to output the first gate output enable signal; and

a second AND operator to receive the inverted 2-frequency divided gate output enable signal and the gate output enable signal as inputs and to output the second gate output enable signal.

11. The display device of claim 8 , wherein the gate IC includes:

a shift register to receive a gate start pulse and the gate shift clock signal from the timing controller, and to output a first output and a second output;

a second inverter to invert the phase of the first gate output enable signal and to output the inverted first gate output enable signal;

a third inverter to invert the phase of the second gate output enable signal and to output the inverted second gate output enable signal;

a third AND operator to receive the first output from the shift register and the inverted first gate output enable signal and to generate a first AND output;

a fourth AND gate to receive the second output from the shift register and the inverted second gate output enable signal and to generate a second AND output; and

a level shifter to generate the first gate pulse based on the first AND output and the second gate pulse based on the second AND output.

12. The display device of claim 11 , wherein the gate IC further includes a buffer unit to amplify the first and second gate pulses, and to supply the amplified first gate pulse to the at least one of the odd-numbered gate lines and the amplified second gate pulse to the at least one of the even-numbered gate lines.

13. The display device of claim 8 , wherein the gate output enable signal division circuit is included in the gate IC.

14. The display device of claim 8 , wherein the gate output enable signal division circuit is included in the timing controller.

15. A method for driving a display device with a display panel having a plurality of data lines and a plurality of gate lines crossing the data lines, the gate lines including a plurality of odd-numbered gate lines and a plurality of even-numbered gate lines, the method comprising:

receiving a gate output enable signal;

generating a first gate output enable signal and a second gate output enable signal based on the gate output enable signal, wherein the first and second gate output enable signals each have a lower frequency than the gate output enable signal;

supplying a first gate pulse to at least one of the odd-numbered gate lines based on the first gate output enable signal; and

supplying a second gate pulse to at least one of the even-numbered gate lines based on the second gate output enable signal.

16. The method of claim 15 , further comprising receiving a gate start pulse and a gate shift clock signal,

wherein the gate start pulse has a width longer than one cycle of the gate shift clock and shorter than two cycles of the gate shift clock signal.

17. The method of claim 15 , further comprising receiving a gate shift clock signal,

wherein at least one of the first and second gate pulses has a width longer than one cycle of the gate shift clock and shorter than two cycles of the gate shift clock signal.

18. The method of claim 15 , further comprising receiving a gate shift clock signal,

wherein the first and second gate pulses overlap each other for a period shorter than one cycle of the gate shift clock signal.

19. The method of claim 15 , wherein the generating of the first and second gate output enable signals includes:

extracting odd-numbered high logic periods of the gate output enable signal to generate the first gate output enable signal; and

extracting even-numbered high logic periods of the gate output enable signal to generate the second gate output enable signal.

20. The method of claim 15 , wherein the generating of the first and second gate output enable signals includes:

dividing the frequency of the gate output enable signal by 2 to generate a 2-frequency divided gate output enable signal;

inverting the 2-frequency divided gate output enable signal to generate an inverted 2-frequency divided gate output enable signal;

performing an AND operation on the 2-frequency divided gate output enable signal and the gate output enable signal to generate the first gate output enable signal; and

performing an AND operation on the inverted 2-frequency divided gate output enable signal and the gate output enable signal to generate the second gate output enable signal.