Disclosed herein is a liquid crystal display device in which an image can be correctly seen even though a screen is rotated. The liquid crystal display device includes a storage unit for storing a plurality of screen change signals, and a timing controller for dividing image data of one horizontal line externally supplied thereto into k odd sub-image data and k even sub-image data, and sequentially outputting the k odd sub-image data and sequentially outputting the k even sub-image data.