Liquid crystal display and driving method thereof

1 . A liquid crystal display comprising:

a plurality of pixels arranged in a matrix;

data lines and gate lines coupled to the pixels;

a signal controller adapted to process received image data and generate normal image data and impulsive image data;

a gray voltage generator operative to generate a plurality of gray voltages; and

a data driver coupled to the gray voltage generator, the data driver being operative to select data voltages and an impulsive voltage corresponding to the normal image data and the impulsive image data from among the gray voltages, respectively, and apply the data voltages and impulsive voltage to the data lines,

wherein the data driver is operative to apply impulsive voltage simultaneously to impulsive voltage application units each comprising a plurality of pixel rows,

wherein the application is such that within one frame an impulsive voltage is applied to a plurality of impulsive voltage applications units, and further wherein

positions of first rows of the respective impulsive voltage application units of two adjacent frames in a unit frame group vary by a predetermined number of rows.

2 . The liquid crystal display of claim 1 , wherein the impulsive voltage application unit has N rows, where N is of a multiple of “2”.

3 . The liquid crystal display of claim 2 , wherein the unit frame group comprises two successive frames, and positions of the first rows of the corresponding impulsive voltage application of two adjacent frames of the unit frame group have a difference of N/2.

4 . The liquid crystal display of claim 3 , wherein the signal controller is operative to output about 120 frames per second to the data driver.

5 . The liquid crystal display of claim 4 , wherein a maintaining time of the data voltage and a maintaining time of the impulsive voltage between the adjacent pixel rows have a difference of about 1H, respectively.

6 . The liquid crystal display of claim 1 , further comprising a gate driver coupled to the gate lines, the gate driver being operative to apply a gate on voltage to the gate lines voltage twice for one frame.

7 . A driving method of a liquid crystal display comprising a plurality of pixels arranged in a matrix, and a plurality of gate lines and a plurality of data lines that are connected to the pixels, the driving method comprising:

transmitting normal image data and impulsive image data by processing image data from an external device;

generating a plurality of gray voltages;

applying a gate on voltage twice to the gate lines;

selecting data voltages and an impulsive voltage corresponding to the normal image data and the impulsive image data among the gray voltages, respectively and applying to the data lines; and

applying the impulsive voltage simultaneously to impulse voltage application units each unit comprising a plurality of pixel rows,

wherein each frame has a plurality of impulsive application units and further wherein, to which the impulsive voltage is applied,

positions of first rows of the respective impulsive voltage application units of two adjacent frames are spaced apart by a predetermined number of rows.

8 . The driving method of claim 7 , wherein the impulsive voltage application unit has N rows, where N is a multiple of “2”.

9 . The driving method of claim 8 , wherein the unit frame group comprises two successive frames, and positions of the first rows of the corresponding impulsive voltage application groups of two adjacent frames of the unit frame group have a difference of N/2.

10 . The driving method of claim 9 , wherein the transmission of the normal image data and the impulsive image data comprises outputting about 120 frames per second.

11 . The driving method of claim 10 , wherein a maintaining time of the data voltage and a maintaining time of the impulsive voltage between the adjacent pixel rows have a difference of about 1H, respectively.

12 . A liquid crystal display comprising:

a plurality of pixels arranged in a matrix;

data lines and gate lines coupled to the pixels;

a signal controller adapted to process received image data and generate normal image data and impulsive image data;

a gate driver adapted to apply a gate on voltage to the gate lines;

a gray voltage generator operative to generate a plurality of gray voltages; and

a data driver coupled to the gray voltage generator, the data driver being operative to select data voltages and an impulsive voltage corresponding to the normal image data and the impulsive image data from among the gray voltages, respectively, and apply the data voltages and impulsive voltage to the data lines,

wherein the data driver is operative to apply impulsive voltage simultaneously to impulsive voltage application units each comprising a plurality of pixel rows,

wherein the application is such that within one frame an impulsive voltage is applied to a plurality of impulsive voltage applications units, and further wherein gate on voltage application orders corresponding the data voltages in the impulsive voltage application units corresponding to each other in two adjacent frames of a unit frame group are opposite, respectively.

13 . The liquid crystal display of claim 12 , wherein the data voltages in the impulsive voltage application units are applied in a reverse order in accordance with the gate on voltage application order.

14 . The liquid crystal display of claim 13 , wherein the signal controller comprises a frame memory, and generates the normal image data in the reverse order in the impulsive voltage application units to apply the data voltages in the reverse order.

15 . The liquid crystal display of claim 12 , wherein the gate driver applies the gate on voltage twice to one gate line in a frame.

16 . A driving method of a liquid crystal display comprising a plurality of pixels arranged in a matrix, and a plurality of gate lines and a plurality of data lines that are connected to the pixels, the driving method comprising:

transmitting normal image data and impulsive image data by processing image data from an external device;

generating a plurality of gray voltages;

applying a gate on voltage twice to the gate lines;

selecting data voltages and an impulsive voltage corresponding to the normal image data and the impulsive image data among the gray voltages, respectively and applying to the data lines; and

applying the impulsive voltage simultaneously to impulse voltage application units each unit comprising a plurality of pixel rows, wherein each frame has a plurality of impulsive application units, each to which the impulsive voltage is applied, and further wherein gate on voltage application orders corresponding the data voltages in the impulsive voltage application units corresponding to each other in two adjacent frames of a unit frame group are opposite, respectively.

17 . The driving method of claim 16 , wherein the selection of the data voltages and the impulsive voltage comprises applying the data voltages in the impulsive voltage application units in a reverse order in accordance with the gate on voltage application order when the gate on voltage is applied in the reverse order.

18 . A liquid crystal display comprising:

a plurality of pixels arranged in a matrix;

data lines and gate lines coupled to the pixels;

a signal controller adapted to process received image data and to generate normal image data and impulsive image data;

a gate driver adapted to apply a gate on voltage to the gate lines;

a gray voltage generator operative to generate a plurality of gray voltages; and

a data driver coupled to the gray voltage generator, the data driver being operative to select data voltages and an impulsive voltage corresponding to the normal image data and the impulsive image data from among the gray voltages, respectively, and apply the data voltages and impulsive voltage to the data lines,

wherein a plurality of pixels arranged in respective rows respectively have a data holding time that the data voltages are sustained and a black holding time that the impulsive voltage is sustained during a frame, and

the data holding time and the black holding time are changed in at least 2 sequential frames such that an average of luminance of respective rows is substantially the same during the at least 2 sequential frames.

19 . The liquid crystal display of claim 18 , wherein the data driver is operative to apply impulsive voltage simultaneously to impulsive voltage application units each comprising a plurality of pixel rows,

wherein the application is such that within one frame an impulsive voltage is applied to a plurality of impulsive voltage applications units, and

further wherein positions of first rows of the respective impulsive voltage application units of two adjacent frames in a unit frame group vary by a predetermined number of rows.

20 . The liquid crystal display of claim 18 , wherein the data driver is operative to apply impulsive voltage simultaneously to impulsive voltage application units each comprising a plurality of pixel rows,

wherein the application is such that within one frame an impulsive voltage is applied to a plurality of impulsive voltage applications units, and

further wherein gate on voltage application orders corresponding to the data voltages in the impulsive voltage application units corresponding to each other in two adjacent frames of a unit frame group are opposite, respectively.

21 . A driving method of a liquid crystal display comprising a plurality of pixels arranged in a matrix, and a plurality of gate lines and a plurality of data lines that are connected to the pixels, the driving method comprising:

transmitting normal image data and impulsive image data by processing image data from an external device;

generating a plurality of gray voltages;

applying a gate on voltage twice to the gate lines; and

selecting data voltages and an impulsive voltage corresponding to the normal image data and the impulsive image data among the gray voltages, respectively and applying to the data lines,

wherein a plurality of pixels arranged in respective rows respectively have a data holding time that the data voltages are sustained and a black holding time that the impulsive voltage is sustained during a frame, and

the selection of the data voltages and the impulsive voltage comprises changing the data holding time and the black holding time in at least 2 sequential frames such that a averaged of luminance of respective rows is substantially same during the at least 2 sequential frames.

22 . The driving method of claim 21 , wherein the selection of the data voltages and the impulsive voltage further comprises

applying the impulsive voltage simultaneously to impulse voltage application units each unit comprising a plurality of pixel rows,

wherein each frame has a plurality of impulsive application units and further wherein, to which the impulsive voltage is applied, and

positions of first rows of the respective impulsive voltage application units of two adjacent frames are spaced apart by a predetermined number of rows.

23 . The driving method of claim 21 , wherein the selection of the data voltages and the impulsive voltage further comprises

applying the impulsive voltage simultaneously to impulse voltage application units each unit comprising a plurality of pixel rows,

wherein each frame has a plurality of impulsive application units, each to which each impulsive voltage is applied, and

further wherein gate on voltage application orders corresponding to the data voltages in the impulsive voltage application units corresponding to each other in two adjacent frames of a unit frame group are opposite, respectively.