Patent ID: 8269934

Claim:
A liquid crystal display device comprising: a first substrate where first to fourth subpixel regions are defined; a pixel electrode disposed on each of the first to fourth subpixel regions; a second substrate facing the first substrate, and where the first to fourth subpixel regions are defined; a first alignment layer aligned to a first direction in the first to third subpixel regions, and aligned to a third direction different from the first direction in the fourth subpixel region on the first substrate; a common electrode on the second substrate; a second alignment layer aligned to a second direction in the first to third subpixel regions, and aligned to a fourth direction different from the second direction in the fourth subpixel region on the second substrate; and a liquid crystal layer between the first and second substrates, wherein the first to third subpixels are driven in a TN (Twisted Nematic) method and the fourth subpixel is driven in ECB (Electrically Controllable Birefringence) method, wherein the fourth subpixel is a viewing angle controlling subpixel to select a wide viewing angle mode or a narrow viewing angle mode, wherein the common electrode comprises: a first common electrode formed on an entire surface of the second substrate and having an open portion corresponding to the fourth subpixel; a second common electrode on the open portion of the first common electrode corresponding to the fourth subpixel region and separated from the first common electrode; and a common line connected to the second common electrode and formed on a black matrix of the second substrate corresponded to a gate line, wherein a range of the viewing angle is controlled by controlling a common voltage and a pixel voltage applied to the fourth subpixel.