Patent ID: 7746334
Filing Date: 2010-06-29
Classification: G09G

Abstract:
1. A driving apparatus of a liquid crystal display device, comprising: a liquid crystal display having a plurality of input channels; a plurality of data drive circuits that generate a video signal having a polarity pattern in accordance with a polarity signal and supply the video signal to the input channels of the liquid crystal display through a plurality of output channels; a timing controller that generates the polarity signal; and a polarity controller in the timing controller that changes the polarity signal on the basis of a first selection signal corresponding to a number of the output channels of each of the data drive circuits and a second selection signal corresponding to a repetition period of the polarity pattern of the video signal displayed in the liquid crystal display panel and supplies the changed polarity signal to the data drive circuits wherein the polarity controller includes a decoder to decode the polarity signal of the timing controller on the basis of the first selection signal and the second selection signal and a polarity distributor to receive the polarity signal from the decoder, wherein the decoder includes a polarity signal input terminal to which the polarity signal is supplied from the timing controller, a polarity pattern input terminal to which the first selection signal of high state or low state is supplied in accordance with a inversion method of the liquid crystal display panel and a channel selection input terminal to which the second selection signal corresponding to the number of output channels of the data drive circuits is supplied, wherein the decoder transmits the polarity signal from the polarity signal input terminal to the polarity distributor in response to the first selection signal and the second selection signal, wherein the polarity distributor converts the polarity signal into at least one of a non-inverted polarity signal and an inverted polarity signal and then supplies at least one of the non-inverted polarity signal and the inverted polarity signal to the data drive circuits, wherein the polarity distributor includes a first output terminal and a second output terminal, wherein the first output terminal of the polarity distributor is connected to odd-numbered data drive circuits among the plurality of data drive circuits and the second output terminal of the polarity distributor is connected to even-numbered data drive circuits among the plurality of data drive circuits, wherein the second selection signal has a low state in case that the number of output channels of the data drive circuits is a multiple of 2, and high state in case of a multiple of 4.