Display device and method of driving the same

1 . A driving circuit for a display device, comprising:

a data driver for inverting a polarity of a pixel data at least every two-field period, for converting the pixel data every field period according to a variable gamma voltage, and for supplying the inverted pixel data to a display panel, a value of the variable gamma voltage changing every field period.

2 . The driving circuit according to claim 1 , further comprising:

a polar signal generator for generating a first polar signal for alternately inverting the polarity between a high voltage and a low voltage every field period, and for generating a second polar signal for inverting the first polar signal every field period; and

a gamma voltage generator for varying the gamma voltage based on one of the first and second polar signals.

3 . The driving circuit according to claim 2 , wherein the polar signal generator generates a third polar signal for alternately inverting the polarity using the first polar signal every two-field period, and a polarity of the gamma voltage is based on the third polar signal.

4 . The driving circuit according to claim 3 , wherein when the third polar signal has a positive polarity, the gamma voltage generator increases the gamma voltage by the high voltage of the first polar signal during a first field period and decreases the gamma voltage by the low voltage of the first polar signal during a second field period.

5 . The driving circuit according to claim 3 , wherein when the third polar signal has a negative polarity, the gamma voltage generator decreases the gamma voltage by a low voltage of the second polar signal during a third field period and increases the gamma voltage by a high voltage of the second polar signal during a fourth field period.

6 . The driving circuit according to claim 1 , wherein the data driver receives an interlace type video data signal.

7 . The driving circuit according to claim 1 , wherein the pixel data includes received pixel data and dummy pixel data, the dummy pixel data generated based on the received pixel data.

8 . The driving circuit according to claim 1 , wherein the data driver changes the pixel data of a first field period according to an increased gamma voltage, and changes the pixel data of a second field period according to a decreased gamma voltage.

9 . The driving circuit according to claim 8 , wherein the data driver changes the pixel data of a third field period according to the decreased gamma voltage, and changes the pixel data of a fourth field period according to the increased gamma voltage.

10 . A method of driving a display device, comprising:

inverting a polarity of a pixel data at least every two-field period;

converting the pixel data every field period according to a variable gamma voltage, a value of the gamma voltage changing every field period; and

supplying the inverted pixel data to a display panel.

11 . The method according to claim 10 , further comprising:

generating a first polar signal for alternately inverting the polarity between a high voltage and a low voltage every field period;

generating a second polar signal for inverting the first polar signal every field period; and

varying the gamma voltage based on one of the first and second polar signals.

12 . The method according to claim 11 , further comprising:

generating a third polar signal for alternately inverting the polarity using the first polar signal every two-field period; and

selecting a polarity of the gamma voltage based on the third polar signal.

13 . The method according to claim 12 , further comprising:

when the third polar signal has a positive polarity, increasing the gamma voltage by the high voltage of the first polar signal during a first field period and decreasing the gamma voltage by the low voltage of the first polar signal during a second field period.

14 . The method according to claim 12 , further comprising:

when the third polar signal has a negative polarity, decreasing the gamma voltage by a low voltage of the second polar signal during a third field period and increasing the gamma voltage by a high voltage of the second polar signal during a fourth field period.

15 . The method according to claim 10 , wherein the converting the pixel data includes:

changing the pixel data of a first field period according to an increased gamma voltage, and changing the pixel data of a second field period according to a decreased gamma voltage.

16 . The method according to claim 15 , wherein the converting the pixel data includes:

changing the pixel data of a third field period according to the decreased gamma voltage, and changing the pixel data of a fourth field period according to the increased gamma voltage.

17 . A driving circuit of a display device, comprising:

a data driver for inverting a polarity of a pixel data every field period and every n-field period, n being a positive integer equal or greater than 2, and for supplying the inverted pixel data to display panel.

18 . The driving circuit according to claim 17 , wherein n is a positive even integer.

19 . The driving circuit according to claim 17 , further comprising:

a polar signal generator for generating a polar signal for alternately inverting the polarity between a high voltage and a low voltage every field period; and

a polarity inverter inverting a polarity of the polar signal every n-field period.

20 . The driving circuit according to claim 17 , wherein the data driver receives an interlace type video data signal.

21 . The driving circuit according to claim 17 , wherein the pixel data includes received pixel data and dummy pixel data, the dummy pixel data generated based on the received pixel data.

22 . A method of driving a display device, comprising:

inverting a polarity of a pixel data every field period; and

inverting the polarity of the pixel data every n-field period, n being a positive integer equal or greater than 2.

23 . The method according to claim 22 , wherein n is a positive even integer.

24 . The method according to claim 22 , further comprising:

generating a polar signal for alternately inverting the polarity between a high voltage and a low voltage every field period; and

inverting a polarity of the polar signal every n-field period.

25 . The method according to claim 22 , further comprising:

receiving an interlace type video data signal.

26 . The method according to claim 25 , further comprising:

generating dummy pixel based on the received interlace type video data signal.