Liquid crystal panel having elements for electrically coupling common electrode and common lines

1. A liquid crystal panel, comprising:

a first substrate comprising a common electrode layer;

a second substrate parallel to the first substrate, the second substrate comprising a plurality of common lines, a plurality of scanning lines parallel to the common lines, a plurality of data lines perpendicular to the scanning lines, a first insulating layer between the common lines and the data lines, and a second insulating layer covering the data lines, each common line comprising a plurality of common electrodes extending from a main body of the common line; and

a liquid crystal layer disposed between the first and second substrates, the liquid crystal layer defining an active area thereat;

wherein a plurality of electrical coupling elements are disposed at the active area, at least one of the electrical coupling elements is provided for each common line, and the electrical coupling elements provide electrical coupling between the common electrode layer and the common lines without superposing the common electrodes of the common line;

wherein the active area comprises a plurality of pixel units arranged as an active matrix, each common line corresponds to a row of pixel units of the active matrix, and a respective one of the electrical coupling elements is provided for each pixel unit, each electrical coupling element comprises an extending electrode disposed on the second insulating layer and a through hole formed through the first and second insulating layers, the extending electrode is electrically coupled to the corresponding common line via the through hole, and is electrically coupled to the common electrode layer via a conductive spacer, the conductive spacer is located at a crossing of a corresponding nearest one of the data lines and the corresponding common line.

2. The liquid crystal panel as claimed in claim 1 , wherein the second substrate further comprises a plurality of pixel electrodes disposed on the first insulating layer.

3. The liquid crystal panel as claimed in claim 2 , wherein the second insulating layer is configured to insulate the pixel electrodes from the data lines.

4. The liquid crystal panel as claimed in claim 3 , wherein the through hole comprises electrical conductive material disposed therein.

5. The liquid crystal panel as claimed in claim 1 , wherein each common electrode is opposite to the corresponding pixel electrode, so as to form a storage capacitor for the corresponding pixel unit.