LIQUID CRYSTAL DISPLAY DEVICE AND DRIVE CONTROL CIRCUIT

摘要

When each of pixels of a liquid crystal display panel is divided into two sub pixels, it is possible to select a drive level of sub pixels for an input video signal gradation from a plurality of combinations while suppressing increase of the circuit size. For this, a liquid crystal display device includes a first sub pixel drive level conversion unit to obtain a first gradation value to drive the first sub pixel according to a gradation value of each pixel of the input video signal, so that the first sub pixel is driven and controlled by the first gradation value. The first gradation value obtained by the first sub pixel drive level conversion unit is converted into a luminance value and a difference from a luminance value obtained when gradation values of the entire pixel is converted is acquired. The acquired difference is converted into a gradation value to obtain a second gradation value for driving the second sub pixel. The second sub pixel is driven and controlled by the second gradation value.