An exemplary liquid crystal display device (200) includes: a first substrate, the first substrate including a parallel scan lines (201) and parallel data lines orthogonal to the scan lines (202); pixel electrodes (203); switches (211) each positioned near a crossing of a corresponding scan line and a corresponding data line, a first terminal of each switch being coupled to a scan line, a second terminal of the switch being coupled to a data line, and a third terminal of the switch being coupled to a corresponding pixel electrodes first data memory units (241), each of which outputs voltage signals to a corresponding pixel electrode during a time period in a frame; and second data memory units (242), each of which outputs voltage signals to the pixel electrode during another time period in the same frame.