Patent ID: 8072473

Claim:
A liquid crystal display device comprising: a first insulation substrate; a first wiring formed on the first insulation substrate and extended in a first direction; a second wiring formed on the first insulation substrate and intersecting the first wiring; a transparent electrode formed in at least one pixel region; a reflective electrode on the transparent electrode in the at least one pixel region and having an opening; a first thin film transistor substrate connected to the first wiring, the second wiring, the transparent electrode and the reflective electrode; a second insulation substrate facing the first insulation substrate; a common electrode formed on the second insulation substrate; and a liquid crystal layer interposed between the first and second insulation substrate and including a liquid crystal molecule and a chiral dopant, wherein a major axis of the liquid crystal molecule is vertically aligned to the first and second insulation substrates, a ratio of a cell gap to a pitch of the liquid crystal layer is in a range from 0 to 0.15, twist angles of the liquid crystal molecules are in a range from about 0Â° to about 50Â°, when electric field is applied to the liquid crystal layer, and a Î”nd of the liquid crystal layer is in a range from about 0.15 to about 0.35, Î” n is a refraction index change of the liquid crystal layer, and d is a cell gap.