Liquid crystal display and pixel unit thereof

A liquid crystal display, comprising

• a plurality of scan lines and a plurality of data lines together defining a plurality of pixel units, wherein each pixel unit comprises:
• a first sub-pixel unit, comprising:
• a first switching device coupled to one of the data lines;
• and
• a first storage capacitor and a first liquid crystal capacitor coupled to the first switching device;
• and
• a second sub-pixel unit, comprising:
• a second switching device coupled to the first switching device;
• a coupling capacitor;
• a second storage capacitor and a second liquid crystal capacitor coupled to the second switching device, wherein the coupling capacitor is coupled between a first input/output terminal and a second input/output terminal of the second switching device, a control terminal of the first switching device is coupled to an nth scan line where n is a positive integer larger than one, and a control terminal of the second switching device is coupled to an (n-1)th scan line.

A pixel unit, comprising:

• a first sub-pixel unit, comprising:
• a first switching device;
• and
• a first storage capacitor and a first liquid crystal capacitor coupled to the first switching device;
• a second sub-pixel unit, comprising:
• a second storage capacitor and a second liquid crystal capacitor coupled to each other;
• and
• a bi-directional diode coupled between the first liquid crystal capacitor and the second liquid crystal capacitor.