Patent ID: 8269706

Claim:
An operating device for an LCD panel including liquid crystal cells in a matrix type configuration, the liquid crystal cells defined by a plurality of gate and data lines, the operating device comprising: a plurality of data driver ICs for supplying data to the data lines of the LCD panel, the plurality of data driver ICs being divided into first and second blocks of the data driver ICs by a central line of all the plurality of data lines, wherein each of the first and second blocks has at least two data driver ICs; a plurality of gate driver ICs for sequentially operating the gate lines of the LCD panel; and a timing controller for supplying a first polarity control signal to only the first block of the data driver ICs and a second polarity control signal to only the second block of the data driver ICs, the first and second polarity control signals having opposite phases to each other, wherein the first and second blocks of the data driver ICs are operated according to a dot inversion method, wherein each data driver IC includes a shift register array supplying sequential sampling signals, a latch array sequentially latching and simultaneously outputting pixel data in response to the sampling signals, a DAC array converting the pixel data into a positive (+) polarity pixel voltage signal and a negative (−) polarity pixel voltage signal according to the first or second polarity control signal, and an output buffer array buffering and outputting the pixel voltage signals to the data lines, and wherein a polarity of the first polarity control signal and a polarity of the second polarity control signal are changed by each horizontal period and have opposite polarities in the each horizontal period.