Liquid crystal display device

A liquid crystal display device, in which a multi-grayscale level state is produced in a liquid crystal layer by applying a different voltage thereto, comprising:

• a liquid crystal display panel having the liquid crystal layer between first and second electrodes;
• an electrode drive circuit, being supplied with multi-voltage power sources, and applying drive voltage pulses generated from the multi-voltage power sources to the first and the second electrodes;
• and
• a multi-voltage power generator circuit supplying the multi-voltage power sources to the electrode drive circuit,
• wherein the multi-voltage power generator circuit includes a first multi-voltage power unit generating first multi-voltage power sources with first stability and having a first consumption current, and a second multi-voltage power unit generating second multi-voltage power sources with second stability higher than the first stability, and having a second consumption current higher than the first consumption current, and
• the liquid crystal display device further comprising:
• a multi-voltage power switch circuit supplying the first or the second multi-voltage power sources from the first or the second multi-voltage power units to the electrode drive circuit;
• and
• a control circuit, in a first drive step, setting the first multi-voltage power unit to an active state and switching the multi-voltage power switch circuit to a supplying state of the first multi-voltage power sources, and, in a second drive step, setting the second multi-voltage power unit to the active state and switching the multi-voltage power switch circuit to a supplying state of the second multi-voltage power sources.