Data driver, display apparatus and driving method thereof

1. A data driver comprising:

data lines;

data voltage output parts which output data voltages to the data lines;

a data voltage sharing part connected to the data lines and which connects output terminals of two or more of the data voltage output parts to each other to charge-share the data voltages between the two or more data voltage output parts;

a power supply line which provides a driving power to each of the data voltage output parts; and

switching devices, each of which is connected between the power supply line and a corresponding data voltage output part of the data voltage output parts to control a supply of the driving power to the corresponding data voltage output part in response to a control signal,

wherein the supply of driving power to the corresponding data voltage output part is turned off during a charge-sharing operation of the data voltage sharing part.

2. The data driver of claim 1 , wherein

the data voltage sharing part outputs the data voltages to the data lines during an active period during which an effective data is transmitted to the data lines within a frame period, and

the data voltage sharing part charge-shares the data voltages during a blank period during which a non-effective data is transmitted to the data lines.

3. The data driver of claim 1 , wherein polarities of the data voltages are inverted every at least one data line.

4. The data driver of claim 2 , wherein the data voltage sharing part comprises:

first switching devices, each of which is connected between a data line of the data lines and a corresponding data voltage output part of the data voltage output parts and controls an output of the data voltages in response to a first control signal; and

second switching devices, each of which is connected between two adjacent output terminals of the output terminals of the data voltage output parts,

wherein the second switching devices electrically connect the two adjacent output terminals to each other in response to a second control signal to charge-share the data voltages.

5. The data driver of claim 4 , wherein the first switching devices are turned off during the blank period and the second switching devices are turned on during the blank period.

6. The data driver of claim 4 , further comprising:

a control signal line which provides the third control signal, set according to the charge-sharing operation of the data voltage sharing part, to the switching devices.

7. The data driver of claim 6 , wherein the first switching devices are turned off during the blank period, the second switching devices are turned on during the blank period and the switching devices are turned off during the blank period.

8. A display apparatus comprising:

a display panel including data lines; and

a data driver which drives the data lines,

wherein the data driver comprises:

data voltage output parts which output data voltages to the data lines;

a data voltage sharing part connected to the data lines and which connects output terminals of two or more of the data voltage output parts to each other to charge-share the data voltages between the two or more data voltage output parts;

a power supply line which provides a driving power to each of the data voltage output parts; and

switching devices, each of which is connected between the power supply line and a corresponding data voltage output part of the data voltage output parts to control a supply of the driving power to the corresponding data voltage output part in response to a control signal,

wherein the supply of driving power to the corresponding data voltage output part is turned off during a charge-sharing operation of the data voltage sharing part.

9. The display apparatus of claim 8 , wherein

the data voltage sharing part outputs the data voltages to the data lines during an active period during which an effective data is transmitted to the data lines within a frame period, and

the data voltage sharing part charge-shares the data voltages during a blank period during which a non-effective data is transmitted to the data lines.

10. The display apparatus of claim 8 , wherein polarities of the data voltages are inverted every at least one data line.

11. The display apparatus of claim 9 , wherein the data voltage sharing part comprises:

first switching devices, each of which is connected between a data line of the data lines and a corresponding data voltage output part of the data voltage output parts and controls an output of the data voltages in response to a first control signal; and

second switching devices, each of which is connected between two adjacent output terminals of the output terminals of the data voltage output parts,

wherein the second switching devices control a charge-sharing operation of the data voltages in response to a second control signal.

12. The display apparatus of claim 11 , wherein the first switching devices are turned off during the blank period and the second switching devices are turned on during the blank period.

13. The display apparatus of claim 11 , further comprising:

a control signal line which provides the third control signal, set according to the charge-sharing operation of the data voltage sharing part, to the switching devices.

14. The display apparatus of claim 13 , wherein the first switching devices are turned off during the blank period, the second switching devices are turned on during the blank period and the switching devices are turned off during the blank period.

15. The display apparatus of claim 13 , further comprising a timing controller which provides the first control signal, the second control signal and the third control signal to the data driver.

16. The display apparatus of claim 15 , wherein the timing controller detects a repeat of the data voltages during a plurality of the frame periods to turn off the second switching devices and the switching devices during the blank period based on the repeat of the data voltages.

17. A method of driving a display apparatus comprising data lines and a data driver which outputs data voltages to the data lines, the method comprising:

receiving an image data including a plurality of frames;

setting the frame which corresponds to the raw image as an active period and the frame which corresponds to the repeated image as a blank period; and

outputting the data voltages corresponding to the raw image during the active period and charge-sharing the data voltages corresponding to the repeated image during the blank period;

wherein cutting off a driving power to the data driver during the blank period.

18. The method of claim 17 , wherein, when n repeated frames are detected among the image data, where n is a natural number greater than 1, a first frame of the n frames is set as the active period, and remaining n-1 frames of the n frames are set as the blank period.