Patent ID: 7719651

Claim:
An in-plane switching (IPS) LCD device comprising: first and second substrates; gate line and data line arranged vertically and horizontally on the first substrate and defining a pixel region; a thin film transistor (TFT) formed at a crossing of the gate line and the data line, wherein the TFT comprises a gate electrode formed on the first substrate; a gate insulation layer stacked entirely over the first substrate with the gate electrode formed thereon; a semiconductor layer formed on the gate insulation layer; source and drain electrodes formed on the semiconductor layer; and a passivation layer stacked entirely over the first substrate with the source and drain electrodes formed thereon; at least one common electrode and at least one pixel electrode alternately disposed at the pixel region in a form with curvature and generating in-plane electric field, wherein the pixel region includes a plurality of domains formed by the common and pixel electrodes; a common electrode connection line for electrically connecting the common electrodes and formed on the first substrate, wherein the common electrode connection line makes an angle smaller than a right angle with at least one common electrode; a pixel electrode connection line for electrically connecting the pixel electrodes, and formed on the passivation layer, wherein the pixel electrode connection line makes an angle smaller than a right angle with at least one pixel electrode; a compensation electrode formed along at least one of the common electrode connection line and the pixel electrode connection line and compensating electric field, wherein the compensation electrode includes a first compensation electrode formed along the pixel electrode connection line, wherein the first compensation electrode overlaps with a portion of the pixel electrode connection line, and is formed on the first substrate, and a second compensation electrode formed along the common electrode connection line, wherein the second compensation electrode overlaps with a portion of the common electrode connection line, and is formed on the passivation layer and wherein a portion of the common electrode extends to form the first compensation electrode, and a portion of the pixel electrode extends to form the second compensation electrode; and a liquid crystal layer formed between the first and second substrates, wherein the compensation electrode is located in regions where the at least one of the common electrode connection line and the pixel electrode connection line cross at an angle less 90 degrees with the respective common electrode and pixel electrode, and wherein the common electrode and the pixel electrode generate radial in-plane electric field within the pixel region.