Liquid crystal display having first and second charge-sharing capacitors

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

first and second gate lines which are arranged in parallel with each other and sequentially transmit a gate voltage;

a data line which intersects the first and second gate lines and transmits a data voltage;

a pixel electrode which is disposed in a pixel and comprises first and second sub-pixel electrodes that are connected to each other through a first charge-sharing capacitor;

a first switching device which is connected to the first gate line, the data line and the first sub-pixel electrode;

a second switching device which is connected to the first sub-pixel electrode through a second charge-sharing capacitor; and

a third switching device which is connected to the second gate line and the second sub-pixel electrode and is also connected to the first sub-pixel electrode through the second charge-sharing capacitor.

2. The LCD of claim 1 , further comprising a storage line which extends in parallel with the first gate line and transmits a common voltage, wherein the second switching device comprises a control terminal which is connected to the first gate line, an output terminal which is connected to the second charge-sharing capacitor, and an input terminal which is connected to the storage line.

3. The LCD of claim 2 , wherein the input terminal of the second switching device is directly connected to the storage line.

4. The LCD of claim 3 , wherein the second charge-sharing capacitor is charged with a voltage corresponding to the difference between the data voltage and the common voltage, if a gate-on voltage is applied to the first gate line.

5. The LCD of claim 2 , wherein the input terminal of the second switching device is connected to the storage line through an auxiliary capacitor.

6. The LCD of claim 1 , wherein the ratio of the capacitance of the first charge-sharing capacitor and the capacitance of the second charge-sharing capacitor ranges from about 1:2 to about 1:5.

7. The LCD of claim 1 , further comprising a common electrode which faces the pixel electrode, wherein the ratio of the sum of the capacitance Cm of the first charge-sharing capacitor and the capacitance Cl of a liquid crystal capacitor and the capacitance Cn of the second charge-sharing capacitor [(Cm+Cl):Cn] ranges from about 1:1 to about 1:4.

8. A method of display, comprising:

providing first and second gate lines which are arranged in parallel with each other and sequentially transmit a gate voltage;

providing a data line which intersects the first and second gate lines and transmits a data voltage;

providing a pixel electrode which is disposed in a pixel and comprises first and second sub-pixel electrodes that are connected to each other through a first charge-sharing capacitor;

providing a first switching device which is connected to the first gate line, the data line and the first sub-pixel electrode;

providing a second switching device which is connected to the first sub-pixel electrode through a second charge-sharing capacitor;

providing a third switching device which is connected to the second gate line and the second sub-pixel electrode and is also connected to the first sub-pixel electrode through the second charge-sharing capacitor; and

charge sharing between data voltages of the first and second sub-pixel electrodes, such that a pixel voltage of the first sub-pixel electrode becomes greater than the data voltage and a pixel voltage of the second sub-pixel electrode becomes lower than the data voltage.