Liquid crystal displaying device and method

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 synthesizing unit synthesizes the inverted driving signal with the high frequency components to provide a correction signal for the backlight,
• wherein the synthesizing unit causes the correction signal to be controlled to match levels of the correction signal and the driving signal in association with the correction signal and the driving signal, and to be superposed on the input signal.

A liquid crystal displaying method used in 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 method comprising:

• dividing an input signal into a plurality of blocks in conformity with a predetermined number of dividing a screen of the backlight unit;
• acquiring high frequency components for each of the plurality of blocks;
• analyzing signal components of the input signal for each of the plurality of blocks;
• acquiring low frequency components for each of the plurality of blocks;
• generating a backlight driving signal for the backlight unit based on signals acquired by the analyzing the signal components and the acquiring the low frequency components;
• inverting the backlight driving signal acquired by the generating the backlight driving signal;
• and
• acquiring a synthesized signal displayed by the liquid crystal displaying unit based on the input signal, the high frequency components acquired by the acquiring the high frequency components, and an inverted driving signal acquired by the inverting the backlight driving signal,
• wherein the inverting of the backlight driving signal includes adjusting a second level for adjusting an inverting level of the backlight driving signal.

A liquid crystal displaying method used in 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 method comprising:

• dividing an input signal into a plurality of blocks in conformity with a predetermined number of dividing a screen of the backlight unit;
• acquiring high frequency components for each of the plurality of blocks;
• analyzing signal components of the input signal for each of the plurality of blocks;
• acquiring low frequency components for each of the plurality of blocks;
• generating a backlight driving signal for the backlight unit based on signals acquired by the analyzing the signal components and the acquiring the low frequency components;
• inverting the backlight driving signal acquired by the generating the backlight driving signal;
• and
• acquiring a synthesized signal displayed by the liquid crystal displaying unit based on the input signal, the high frequency components acquired by the acquiring the high frequency components, and an inverted driving signal acquired by the inverting the backlight driving signal,
• wherein the acquiring of the synthesized signal synthesizes the inverted driving signal with the high frequency components to provide a correction signal for the backlight
• wherein the acquiring of the synthesized signal includes causing the correction signal to be associated with the backlight driving signal, controlled to match levels of the correction signal and the driving signal, and superposed on the input signal.