Patent ID: 8508560

Claim:
A liquid crystal displaying device having a liquid crystal displaying unit and a backlight unit for emitting a light into a back surface of the liquid crystal displaying unit, the liquid crystal displaying device comprising: a signal processing unit configured to divide an input signal into a plurality of blocks in conformity with a predetermined number of dividing a screen of the backlight unit; a high frequency component acquiring unit configured to acquire high frequency components for each of the plurality of blocks; a signal component analyzing unit configured to analyze signal components of the input signal for each of the plurality of blocks; a low frequency component acquiring unit configured to acquire low frequency components for each of the plurality of blocks; a backlight driving signal generating unit configured to generate a backlight driving signal for the backlight unit based on signals acquired by the signal component analyzing unit and the low frequency component acquiring unit; an inverter configured to invert the backlight driving signal acquired by the backlight driving signal generating unit; and a synthesizing unit configured to acquire a synthesized signal displayed by the liquid crystal displaying unit based on the input signal, the high frequency components acquired by the high frequency component acquiring unit, and an inverted driving signal acquired by the inverter, wherein the inverter includes a second level adjusting unit configured to adjust an inverting level of the backlight driving signal.