Low power driving method for reducing non-display area of tft-lcd

Abstract

A liquid crystal display device includes a liquid crystal display panel in which pixels are arranged in rows and columns. Each of the pixels includes a pixel electrode, and a thin-film transistor having a gate electrode and a drain electrode. Gate signal lines arranged in the rows are connected to the gate electrodes of the thin-film transistors. Drain signal lines arranged in the columns are connected to the drain electrodes of the thin-film transistors. The liquid crystal display device further includes a gate drive circuit for driving the gate signal lines, and a drain drive circuit for driving the drain signal lines. The drain drive circuit receives a plurality of grey-scale reference voltages from an external circuit, interpolates a plurality of intermediate voltages between each pair of adjacent ones of the grey-scale reference voltages, selects voltages from the grey-scale reference voltages and the intermediate voltages, and applies the selected voltages to the drain signal lines. V,is a grey-scale reference voltage corresponding to a minimum grey-scale level, Vm is a grey-scale reference voltage corresponding to a maximum grey-scale level, and Vi is a grey-scale reference voltage that is nearest to a voltage level (Vm+V,)/2. A number of intermediate voltages interpolated between V(i−1) and Vi is different from both a number of intermediate voltages interpolated between V,and V,, and a number of intermediate voltages interpolated between V(m−1) and Vm.