Liquid crystal display of switching to show 2D/3D image

A liquid crystal display (LCD) of switching to show 2D/3D image, comprising:

• a scan line for sending a scan signal;
• a data line for sending a grey level signal;
• a plurality of pixel units on a first row for showing grey level according to the grey level signal;
• a controlling signal generator for generating a first controlling signal, a second controlling signal, a third controlling signal and a fourth controlling signal;
• a first switch unit, electrically connected to the scan line and the pixel units on the first row, for conducting the scan signal to the pixel units on the first row when receiving the first controlling signal;
• a second switch unit, electrically connected to a constant voltage and the pixel units on the first row, for conducting the constant voltage to the pixel units on the first row when receiving the second controlling signal;
• a charge sharing switch, electrically connected between two pixels on the first row, for electrically connecting the two pixels on the first row when receiving a charge sharing signal and turning on;
• a third switch unit, electrically connected to the scan line and the charge sharing switch, for conducting the scan signal to turn on the charge sharing switch when receiving the third controlling signal;
• and
• a fourth switch unit, electrically connected to the constant voltage, for conducting the constant voltage to turn off the charge sharing switch when receiving the fourth controlling signal.