Liquid crystal display and driving method thereof

A liquid crystal display device, comprising:

• a liquid crystal panel including a plurality of pixels arranged in a matrix format;
• a scan driver connected to each of a plurality of scan lines connected to the plurality of pixels, each of the pixels including a switching transistor connected to corresponding ones of the scan lines, the scan driver turning on the switching transistors by sequentially applying a gate-on voltage to the plurality of scan lines during a data writing period during which the switching transistors of all of the pixels are sequentially turned on by the scan driver;
• a data driver applying data voltages corresponding to all of the plurality of pixels through the turned-on switching transistors during the data writing period;
• and
• a power supply applying a single common voltage simultaneously to all of the plurality of pixels during the data writing period;
• wherein the scan driver sequentially applies a gate-off voltage to each of the scan lines to turn off the switching transistors of each of the scan lines after the data voltages are applied to the plurality of pixels connected to the corresponding scan lines, and,
• during a sustain period, which immediately follows the data writing period, in which the switching transistors of all the pixels are turned off by the scan driver and all of the plurality of pixels emit light, the power supply applies a single shifted common voltage simultaneously to all of the plurality of pixels, and the shifted common voltage is shifted to an opposite polarity relative to a polarity of the gate-off voltage to float the plurality of pixels.

A liquid crystal display device, comprising:

• a liquid crystal panel including a plurality of pixels, each of the pixels comprising:
• a switching transistor receiving a gate-on voltage from a scan driver via a corresponding scan line during a data writing period for all of the pixels;
• the switching transistor receiving a data voltage from a data driver, and receiving a gate-off voltage that turns off the switching transistor after the data voltage is applied to the pixel during the data writing period;
• a liquid crystal capacitor connected in parallel with a sustain capacitor, and commonly connected to the switching transistor;
• and
• a power supply applying a common voltage to the liquid crystal capacitor and the sustain capacitor during the data writing period, and applying a shifted common voltage to the liquid crystal capacitor and the sustain capacitor during a sustain period immediately following the data writing period, the shifted common voltage being shifted to an opposite polarity relative to a polarity of the gate-off voltage,
• each of the pixels connected to receive the same common voltage, and to receive simultaneously the same shifted common voltage,
• during the data writing period, the switching transistors of all of the pixels being sequentially turned on, and
• during the sustain period, the switching transistors of all the pixels being turned off.