Liquid crystal display and method of controlling dot inversion thereof

Abstract

The invention discloses a liquid crystal display and a method of controlling dot inversion thereof. A liquid crystal display includes: a liquid crystal display panel including data lines and gate lines crossing each other; a timing controller that maps data of an input image to polarity patterns of 1-dot inversion and 2-dot inversion, counts the number of positive data and the number of negative data, determines whether any one of the positive data and negative data becomes dominant or not based on a difference between the counted numbers, and selects either one of the 1-dot and 2-dot inversions; a data driving circuit that converts the data of the input image into data voltages to be supplied to the data lines and inverts the polarity of the data voltages by the selected dot inversion; and a gate driving circuit that sequentially supplies gate pulses synchronized with the data voltages to the gate lines.

Description

technical field

[0001] This document relates to liquid crystal displays and methods for controlling dot inversion thereof. Background technique

[0002] This application claims priority from Korean Patent Application No. 10-2009-0075382 filed Aug. 14, 2009, the entire contents of which are hereby incorporated by reference as if fully set forth herein.

[0003] Active matrix liquid crystal displays display moving images using thin film transistors (hereinafter, referred to as "TFTs") as switching elements. Liquid crystal displays can be smaller in size than cathode ray tubes (CRTs). Accordingly, liquid crystal displays are used as displays in portable information devices, office equipment, computers, televisions, etc., and thus are rapidly replacing cathode ray tubes.

[0004] A liquid crystal cell of a liquid crystal display displays a picture image by changing a transmittance by a potential difference between a data voltage supplied to a pixel electrode and a common volta...

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