Patent ID: 8040481

Claim:
An in-plane switching mode liquid crystal display device comprising: a first substrate; a gate line disposed in a first direction on the first substrate; a data line disposed in a second direction on the first substrate, the data line crossing the gate line to define a pixel region, including a first pixel region and a second pixel region; one or more first pixel electrode and one or more first common electrode inclined with respect to the first direction and generating a first in-plane electric field within the first region; one or more second pixel electrode and one or more second common electrode inclined with respect to the first direction and generating a second in-plane electric field within the second region symmetrically to the first in-plane electric field with respect to the first direction; first and second common lines parallel to the data line at left and right sides of the pixel region, respectively; a first common electrode connection line overlapping the first common line of the first region and connecting at least two first common electrodes; a second common electrode connection line overlapping the second common line of the second region and connecting at least two second common electrodes; a first pixel electrode connection line overlapping the second common line of the first region and connecting at least two first pixel electrodes; a second pixel electrode connection line overlapping the first common line of the second region and connecting at least two second pixel electrodes; and an extending pattern protruding into the pixel region from the first common line and forming a storage capacitor at a boundary surface between the first pixel region and the second pixel region together with a storage electrode protruding from the first pixel electrode connection line and overlapping the extending pattern, wherein a first common electrode overlapping region of the first common line and the first common electrode connection line and a second common electrode overlapping region of the second common line and the second common electrode connection line have the same area, and a first pixel electrode overlapping region of the second common line and the first pixel electrode connection line and a second pixel electrode overlapping region of the first common line and the second pixel electrode connection line have the same area.