Liquid crystal display apparatus, liquid crystal driving apparatus, and method for driving liquid crystal display apparatus

1. A liquid crystal display (LCD) apparatus comprising:

a panel unit which comprises at least one pixel group comprising a plurality of pixels; and

a controlling unit which inserts gray data which is not image data into at least one pixel of the plurality of pixels of the at least one pixel group and inserts image data into the other pixels of the plurality of pixels of the at least one pixel group according to a frame period and a polarity of the plurality of pixels, wherein:

the controlling unit inserts gray data into at least one pixel of a first pixel group in a first pattern and inserts gray data in at least one pixel of a second pixel group in a second pattern different from the first pattern,

in a first frame period, the controlling unit inserts gray data into the at least one pixel of the first pixel group according to a first sub pattern of the first pattern, and inserts gray data into the at least one pixel of the second pixel group according to a first sub pattern of the second pattern, and

in a second frame period, the controlling unit inserts gray data into the at least one pixel of the first pixel group according to a second sub pattern of the first pattern which is different from the first sub pattern of the first pattern, and inserts gray data into the at least one pixel of the second pixel group according to a second sub pattern of the second pattern which is different from the first sub pattern of the second pattern.

2. The LCD apparatus as claimed in claim 1 , wherein the controlling unit inserts the gray data into the at least one pixel of the at least one pixel group in a predetermined pattern for a predetermined frame period.

3. The LCD apparatus as claimed in claim 2 , wherein the predetermined pattern is a pattern in which gray data is inserted into the at least one pixel of the plurality of pixels of the at least one pixel group for a single frame.

4. The LCD apparatus as claimed in claim 2 , wherein the predetermined pattern is a pattern in which the gray data is inserted into each pixel of the plurality of pixels of the at least one pixel group at least one time for the predetermined frame period.

5. The LCD apparatus as claimed in claim 2 , wherein the controlling unit selects one predetermined pattern of a plurality of predetermined patterns for each pixel group of the at least one pixel group, and inserts the gray data according to the selected pattern.

6. The LCD apparatus as claimed in claim 2 , wherein the predetermined pattern comprises a plurality of sub patterns, and

the controlling unit inserts gray data into the at least one pixel of the plurality of pixels of the at least one pixel group according to a first sub pattern in a first frame period, and inserts gray data into the at least one pixel of the plurality of pixels of the at least one pixel group according to a second sub pattern in a second frame period.

7. The LCD apparatus as claimed in claim 6 , wherein

in the first sub pattern, the controlling unit inserts gray data into each pixel of the plurality of pixels of the at least one pixel group beginning with a first pixel and ending with a last pixel, including inserting gray data into a second pixel after the first pixel; and

wherein, in the second sub pattern, the controlling unit inserts gray data into each pixel of the plurality of pixels of the at least one pixel group beginning with the second pixel and ending with the first pixel.

8. The LCD apparatus as claimed in claim 6 , wherein the second sub pattern is rotated at least one pixel in relation to the first sub pattern.

9. The LCD apparatus as claimed in claim 1 , wherein if the at least one pixel group is formed by N*N pixels, the controlling unit inserts the gray data into each pixel of the plurality of pixels of the at least one pixel group every (N 2 −1) th frame or (N 2 +1) th frame.

10. The LCD apparatus as claimed in claim 1 , wherein the controlling unit inserts gray data into a first pixel of the plurality of pixels of the at least one pixel group during a first frame;

determines a time point after the first frame at which a number of frames during which the first pixel has positive polarity is identical to a number of frames during which the first pixel has negative polarity; and

inserts gray data into the first pixel at the determined time point.

11. The LCD apparatus as claimed in claim 1 , further comprising:

an input unit which receives Red, Green, Blue (RGB) data,

wherein the controlling unit generates a gray data mask based on information regarding the at least one pixel of the plurality of pixels of the at least one pixel group into which gray data are inserted in a current frame, and masks the RGB data using the gray data mask.

12. The LCD apparatus as claimed in claim 11 , further comprising:

a driving unit which generates gray data voltage and normal data voltage, and inserts one of the gray data voltage and the normal data voltage into the plurality of pixels of the at least one pixel group,

wherein the controlling unit controls the driving unit based on the RGB data masked by the gray data mask to apply one of the gray data voltage and the normal data voltage to each pixel of the plurality of pixels of the at least one pixel group.

13. A liquid crystal driving apparatus, comprising:

a gate driving unit which applies gate-on voltage to a plurality of pixels; and

a data driving unit which applies gray data voltage corresponding to gray data which is not image data to at least one pixel of the plurality of pixels and applies normal data voltage corresponding to image data to the other pixels of the plurality of pixels according to a frame period and a polarity of the plurality of pixels, wherein:

the data driving unit applies gray data voltage to at least one pixel of a first pixel group in a first pattern and applies gray data voltage to at least one pixel of a second pixel group in a second pattern different from the first pattern,

in a first frame period, the data driving unit applies gray data voltage to the at least one pixel of the first pixel group according to a first sub pattern of the first pattern, and applies the gray data voltage to the at least one pixel of the second pixel group according to a first sub pattern of the second pattern, and

in a second frame period, the data driving unit applies gray data voltage to the at least one pixel of the first pixel group according to a second sub pattern of the first pattern which is different from the first sub pattern of the first pattern, and applies gray data voltage to the at least one pixel of the second pixel group according to a second sub pattern of the second pattern which is different from the first sub pattern of the second pattern.