Patent ID: 7193676

Claim:
A liquid crystal display device comprising: a first transparent plate having a plurality of segment electrodes for receiving driving segment signals and a dummy segment electrode; a second transparent plate having a plurality of common electrodes for receiving driving common signals and a dummy common electrode, the second transparent plate being spaced-apart from and opposite to the first transparent plate to define a gap therebetween; and a liquid crystal layer disposed in the gap between the first and second transparent electrodes; wherein the plurality of segment and common electrodes define a plurality of pixels arranged in a matrix for displaying an image, the dummy segment electrode is disposed outside of the segment electrodes defining the pixels for displaying an image, and the dummy common electrode is disposed outside of the common electrodes defining the pixels for displaying an image; wherein the dummy segment electrode receives a dummy segment signal waveform so that an effective voltage value between the dummy segment signal waveform and any waveform of the driving common signals exceeds a selection voltage applied across the liquid crystal layer, and the dummy common electrode receives a dummy common signal waveform so that an effective voltage value between the dummy common signal waveform and any waveform of the driving segment signals exceeds the selection voltage applied across the liquid crystal layer, whereby dots formed by the dummy segment electrode and the common electrodes and dots formed by the dummy common electrode and the segment electrodes are placed in a normally ON state.