Display device and driving method thereof
Provided are a display device and a driving method thereof. The display device includes a display panel including a plurality of pixels defined by allowing a plurality of gate lines and a plurality of data lines to intersect each other; a timing controller generating a gate control signal, a data control signal, a MUX clock signal, and image data; a gate driving circuit sequentially providing gate signals to the plurality of gate lines based on the gate control signal; a data driving circuit supplying a data signal to the plurality of data lines based on the image data and the data control signal to drive the pixels; and a MUX circuit receiving the data signal and outputting the data signal in a time division manner to the data lines according to the MUX clock signal. The timing controller includes a slew rate control unit controlling a slew rate of the MUX clock signal.
1. A display device, comprising:
a display panel including a plurality of pixels defined by allowing a plurality of gate lines and a plurality of data lines to intersect each other;
a timing controller configured to generate a gate control signal, a data control signal, a multiplexer (MUX) clock signal, and image data;
a gate driving circuit configured to sequentially provide gate signals to the plurality of gate lines based on the gate control signal;
a data driving circuit configured to supply a data signal to the plurality of data lines based on the image data and the data control signal to drive the plurality of pixels; and
a MUX circuit configured to receive the data signal and output the data signal in a time division manner to the plurality of data lines according to the MUX clock signal,
wherein the timing controller includes a slew rate control unit that controls a slew rate of the MUX clock signal, in which the slew rate control unit includes:
a rising slew rate control unit configured to control the slew rate in a rising section of the MUX clock signal, and
a falling slew rate control unit configured to control the slew rate in a falling section of the MUX clock signal.
2. The display device of claim 1 , wherein the MUX clock signal includes a positive MUX clock signal and a negative MUX clock signal that is complementary to the positive MUX clock signal, and
wherein the MUX circuit includes a plurality of transmission gates that are switched according to the positive MUX clock signal and the negative MUX clock signal.
3. The display device of claim 2 , wherein the rising slew rate control unit includes:
a first circuit configured to control the slew rate in a rising section of the positive MUX clock signal; and
a second circuit configured to control the slew rate in a rising section of the negative MUX clock signal, and
wherein the falling slew rate control unit includes:
a third circuit configured to control the slew rate in a falling section of the positive MUX clock signal; and
a fourth circuit configured to control the slew rate in a falling section of the negative MUX clock signal.
4. The display device of claim 3 , wherein the timing controller measures a first intersection point and a second intersection point at which the positive MUX clock signal and the negative MUX clock signal intersect each other, and
wherein the timing controller controls the slew rate in the rising section and the slew rate in the falling section of the positive MUX clock signal, and the slew rate in the rising section and the slew rate in the falling section of the negative MUX clock signal, so that the first intersection point and the second intersection point meet at the same voltage.
5. The display device of claim 1 , wherein the slew rate control unit includes:
a high potential voltage line and a low potential voltage line arranged side by side;
at least one first transistor pulling up an output terminal to the high potential voltage according to a first switching signal; and
at least one second transistor pulling down the output terminal to the low potential voltage according to a second switching signal.
6. A method of driving a display panel, the method comprising:
generating a gate control signal, a data control signal, and a multiplexer (MUX) clock signal;
generating a data signal provided to a plurality of data lines based on the data control signal;
providing the data signal to a MUX circuit;
outputting the data signal in a time division manner based on the MUX clock signal; and
controlling a slew rate at a rising time and a slew rate at a falling time of the MUX clock signal to be provided to the MUX circuit.
7. The method of claim 6 , wherein the MUX clock signal includes a positive MUX clock signal and a negative MUX clock signal that is complementary to the positive MUX clock signal, and
wherein the MUX circuit includes a plurality of transmission gates that are switched according to the positive MUX clock signal and the negative MUX clock signal.
8. The method of claim 7 , further comprising:
measuring a first intersection point and a second intersection point at which the positive MUX clock signal and the negative MUX clock signal intersect each other; and
controlling a slew rate in a rising section and a slew rate in the falling section of the positive MUX clock signal, and a slew rate in the rising section and a slew rate in the falling section of the negative MUX clock signal, so that the first intersection point and the second intersection point meet at the same voltage.