Apparatus and method for driving liquid crystal display device

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 logic signal generator to generate first logic signal and second logic signal that controls the polarity signal;
• and
• a polarity controller to convert the polarity signal in accordance with the logic signal and supply the polarity signal to the data drive circuits,
• wherein the polarity signal is based on a first selection signal corresponding to the number of the output channels in each of the plurality of data drive circuits and a second selection signal corresponding to a repetition period of the polarity pattern,
• wherein the polarity controller is embedded in each of the plurality of data drive circuits,
• wherein the plurality of data drive circuits generate the polarity signal on accordance with the logic signal supplied from the logic signal generator on the basis of the first and second selection signals,
• wherein the first logic signal is supplied to a chip identifier of an odd-numbered data drive circuit among the plurality of data drive circuits, and the second logic is supplied to a chip identifier of an even-numbered data drive circuit among the plurality of data drive circuits,
• wherein the polarity controller embedded in the odd-numbered data drive circuit, which receives the first logic signal through the chip identifier, generates the polarity signal in accordance with the chip identifier to determine the polarity signal of the odd-numbered data drive circuit,
• wherein the polarity controller embedded in the even-numbered data drive circuit, which receives the second logic signal through the chip identifier, generates the polarity signal in accordance with the chip identifier to determine the polarity signal of the even-numbered data drive circuit.

A driving method of a liquid crystal display device having a liquid crystal display which includes liquid crystal cells disposed in a matrix shape to display a video signal, a plurality of data drive circuits that generate a polarity pattern of the video signal to supply the polarity pattern to the liquid crystal cell through a plurality of output channels, and a timing controller to control the data drive circuits, the method comprising:

• generating a polarity signal;
• generating the polarity pattern of the video signal in accordance with the polarity signal by controlling the polarity signal in accordance with the number of the output channels of each of the plurality of data drive circuits
• changing 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 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.

A driving method of a liquid crystal display device having a liquid crystal display which includes liquid crystal cells disposed in a matrix shape to display a video signal, and a plurality of data drive circuits that generates a polarity pattern of the video signal to supply the polarity pattern to the liquid crystal cells through a plurality of output channels, the method comprising:

• generating a polarity signal;
• generating a first logic signal and a second logic signal that is different from the first logic signal;
• controlling the polarity signal in accordance with the first and second logic signals according to the number of the output channels by use of the polarity controller included in each data drive circuit;
• and
• generating the polarity pattern of the video signal in accordance with the polarity signal supplied from the polarity controller,
• wherein the polarity controller embedded in each of the plurality of data drive circuits,
• wherein the plurality of data drive circuits generate the polarity signal on accordance with the first and second logic signals on the basis of first and second selection signals,
• wherein the first logic signal is supplied to a chip identifier of an odd-numbered data drive circuit among the plurality of data drive circuits, and the second logic is supplied to a chip identifier of an even-numbered data drive circuit among the plurality of data drive circuits,
• wherein the polarity controller embedded in the odd-numbered data drive circuit, which receives the first logic signal through the chip identifier, generates the polarity signal in accordance with the chip identifier to determine the polarity signal of the odd-numbered data drive circuit,
• wherein the polarity controller embedded in the even-numbered data drive circuit, which receives the second logic signal through the chip identifier, generates the polarity signal in accordance with the chip identifier to determine the polarity signal of the even-numbered data drive circuit.