Patent ID: 8891049

Claim:
An in-plane switching mode liquid crystal display device, comprising: a lower substrate and an upper substrate; a plurality of sub-pixels on the lower substrate and defined and surrounded by a plurality of gate lines and data lines, each of the plurality of sub-pixels having an aperture region and a non-aperture region surrounding the aperture region and including first and second common lines, a plurality of common electrodes between the first and second common lines, first and second pixel electrode lines and a plurality of pixel electrodes between the first and second pixel electrode lines, the first common line overlapping the first pixel electrode line and the second common line overlapping the second pixel electrode line, the aperture region including a plurality of blocks through which light is transmitted, each of the plurality of blocks defined by the first pixel electrode line, the second common line, the plurality of common electrodes and the plurality of pixel electrodes; a black matrix having an opening and formed on the upper substrate; and a liquid crystal layer between the lower substrate and the upper substrate, wherein the plurality of common electrodes of each sub-pixel includes at least a first outermost common electrode and a second outermost common electrode, the first and second outermost common electrodes of each sub-pixel are disposed in the non-aperture region, wherein an area of the opening of the black matrix is greater than at least a size of the aperture region including the plurality of blocks, wherein the black matrix does not overlap the aperture region of the sub-pixel, wherein a distance from an innermost edge of the black matrix to an outermost edge of the aperture region is sufficiently large in substantially all directions within each sub-pixel to avoid a stitch failure due to a misalignment caused by a step exposure method of forming the black matrix on the upper substrate, and wherein the plurality of sub-pixels includes a first sub-pixel and a second sub-pixel adjacent to each other in a horizontal direction, and a width of the black matrix between an aperture region of the first sub-pixel and an aperture region of the second sub-pixel is smaller than or identical to a distance from the second outermost common electrode of the first sub-pixel to the first outermost common electrode of the second sub-pixel.