Patent ID: 8149368

Claim:
An array substrate for an IPS-LCD device, the array substrate comprising: a substrate; a gate line on the substrate; a data line perpendicular to the gate line; a thin film transistor at a crossing portion between the gate and data lines; a common line parallel to the gate line, the common line including a plurality of common electrodes extending perpendicular to the common line; a plurality of pixel electrodes arranged alternately with the plurality of common electrodes; a single auxiliary common electrode perpendicular to and integrally formed with the plurality of common electrodes; and a single auxiliary pixel electrode perpendicular to and integrally formed with the plurality of pixel electrodes, wherein the single auxiliary common electrode, the single auxiliary pixel electrode, the plurality of common electrodes and the plurality of pixel electrodes are disposed in a check pattern, wherein the single auxiliary common electrode crosses the plurality of common electrodes and the plurality of pixel electrodes, and the single auxiliary pixel electrode crosses the plurality of pixel electrodes and the plurality of common electrodes, wherein the single auxiliary common electrode divides each of the plurality of common electrodes into a two-third portion and a one-third portion, and wherein the single auxiliary pixel electrode divides each of the plurality of pixel electrodes into a one-third portion and a two-third portion.