Driving method for liquid crystal display apparatus and liquid crystal display apparatus

An active matrix liquid crystal display apparatus, comprising:

• a device including a plurality of gate lines for sequentially carrying a gate signal, a plurality of source lines crossing the plurality of gate lines for carrying a source signal, a plurality of pixel electrodes corresponding to respective crossings of the gate lines and the source lines, each of the pixel electrodes including a switching element, and a plurality of storage capacitors associated with a respective pixel electrodes, wherein one terminal of each storage capacitor is connected to a corresponding pixel electrode;
• a counter electrode facing the device;
• a liquid crystal layer including liquid crystal molecules, placed between the device and the counter electrode;
• and
• a liquid crystal capacitor formed between each pixel electrode and the counter electrode, wherein potentials of the source signal, the other terminal of the storage capacitor and the counter electrode are set such that a potential difference from the potential of the other terminal of the storage capacitor to the potential of the counter electrode varies repeatedly, and wherein the absolute value of a first voltage applied between the pixel electrode and the counter electrode when the potential difference is the same as that during writing of a charge to the pixel electrode and the absolute value of a second voltage applied between the pixel electrode and the counter electrode when the potential difference is different from that during writing of a charge to the pixel electrode is determined to provide an effective voltage applied to the liquid crystal capacitor during display of a moving image of a gray-scale level that is different from an effective voltage applied to the liquid crystal capacitor during display of a still image of the gray-scale level.

An active matrix liquid crystal display apparatus adopting an AC drive system, comprising:

• a device-side substrate comprising a plurality of gate lines for sequentially carrying a gate signal, a plurality of source lines crossing the plurality of gate lines for carrying a source signal, a plurality of pixel electrodes corresponding to respective crossings of the gate lines and the source lines, each of the pixel electrodes including a switching element, and a plurality of storage capacitors associated with a respective pixel electrode, wherein one terminal of each storage capacitor is connected to a corresponding pixel electrode;
• a counter substrate comprising a counter electrode, placed to face the device-side substrate;
• a liquid crystal layer including liquid crystal molecules, interposed between the device-side substrate and the counter substrate;
• and
• a liquid crystal capacitor formed between each pixel electrode and the counter electrode, wherein potentials of the source signal, the other terminal of the storage capacitor and the counter electrode are set so that a potential difference from the potential of the other terminal of the storage capacitor to the potential of the counter electrode varies repeatedly and wherein the absolute value of a first voltage applied between the pixel electrode and the counter electrode when the potential difference is the same as that during writing of a charge to the pixel electrode is at most equal the absolute value of a second voltage applied between the pixel electrode and the counter electrode when the potential difference is different from that during writing of a charge to the pixel electrode.