Patent ID: 7403254

Claim:
An in-plane switching liquid crystal display device comprising: first and second substrates; gate lines and data lines on the first substrate and intersecting each other; a plurality of unit pixels defined by the intersection of the gate and data lines, each unit pixel including a plurality of sub-pixel regions; a first common electrode, second common electrode and a pixel electrode in each sub-pixel region to generate an in-plane electric field, wherein the pixel electrode has a first closed-curved surface shape with a hollow center and is located between the first and second common electrodes with a space therebetween; and the first common electrode has a second closed-curved surface shape at a center portion of the sub-pixel region, and the second common electrode has a curvature opening corresponding to the shape of the pixel electrode as an outermost common electrode within the sub-pixel region and a third closed-curved surface shape; a pixel electrode line connected to the pixel electrode and having a fourth closed-curved surface shape; and a liquid crystal layer between the first substrate and the second substrate.