Liquid crystal display device and driving method thereof

1. A liquid crystal display device dividing one frame into green, red and blue sub-frames, comprising:

a plurality of data lines and a plurality of gate lines defining a plurality of liquid crystal cells;

a data driver for sequentially supplying a green data signal during the green sub-frame, a red data signal during the red sub-frame and a blue data signal during the blue sub-frame to the data lines;

a gate driver for applying a scanning pulse to the gate lines; and

a light source for irradiating a green light onto the liquid crystal cells during the green sub-frame after the green data signal is maintained at the liquid crystal cells, irradiating a red light onto the liquid crystal cells during the red sub-frame after the red data signal is maintained at the liquid crystal cells, and irradiating a blue light to the liquid crystal cells during the blue sub-frame after the blue data signal is maintained at the liquid crystal cells,

wherein the light transmittance of the liquid crystal cells at the later sub-frame has a value incorporating the cumulative light transmittance of the liquid crystal cells at the prior sub-frame.

2. The liquid crystal display device according to claim 1 , wherein the gate driver synchronizes the scanning pulse with the green, red and blue data signals.

3. The liquid crystal display device according to claim 1 , further comprising:

a controller for controlling the data driver, the gate driver and the light source.

4. The liquid crystal display device according to claim 1 , wherein the light source includes:

a light-source supplying the green light during the green sub-frame after the green data signal is maintained at the liquid crystal cell;

a light-source supplying the red light during the red sub-frame after the red data signal is maintained at the liquid crystal cell; and

a light-source supplying the blue light during the blue sub-frame after the blue data signal is maintained at the liquid crystal cell.

5. The liquid crystal display device according to claim 1 , wherein the light source is a florescent lamp or a light emitting diode.

6. A method of driving a liquid crystal display device dividing one frame into green, red and blue sub-frames, comprising:

forming a plurality of liquid crystal cells arranged in a matrix at intersections between a plurality of data lines and a plurality of gate lines;

sequentially supplying a green data signal during the green sub-frame, a red data signal during the red sub-frame and a blue data signal during the blue sub-frame to the data lines;

applying a scanning pulse to the gate lines;

irradiating a green light onto the liquid crystal cells during the green sub-frame after a green data is maintained at the liquid crystal cells;

irradiating a red light onto the liquid crystal cells during the red sub-frame after a red data is maintained at the liquid crystal cells; and

irradiating a blue light onto the liquid crystal cells during the blue sub-frame after a blue data is maintained at the liquid crystal cells,

wherein the light transmittance of the liquid crystal cells at the later sub-frame has a value incorporating the cumulative light transmittance of the liquid crystal cells at the prior sub-frame.

7. The method according to claim 6 , wherein the irradiating a green light includes:

supplying the green data to the data lines and, at the same time, supplying a scanning pulse to the gate lines.

8. The method according to claim 6 , wherein the irradiating a red light includes:

supplying the red data to the data lines and, at the same time, supplying a scanning pulse to the gate lines.

9. The method according to claim 6 , wherein the irradiating a blue light includes:

supplying the blue data to the data lines and, at the same time, supplying a scanning pulse to the gate lines.