Patent ID: 7427974
Filing Date: 2008-09-23
Classification: G09G

Abstract:
1. A display apparatus comprising: a liquid crystal device including a pair of substrates and a liquid crystal disposed between the pair of substrates to form a plurality of pixels; and control means for effecting a plurality of displaying operations at each pixel, each displaying operation including a sequence of a first display operation and a second display operation, wherein the liquid crystal aligns at a mono-stable molecular position of minimum transmittance under no electric field and exhibits a voltage-transmittance characteristic of showing a continuously increased first transmittance in response to an increased magnitude of voltage of a first polarity and a continuously increased second transmittance in response to an increased magnitude of voltage of a second polarity opposite to the first polarity, a saturated maximum of the second transmittance being smaller than a saturated maximum of the first transmittance, and wherein a first drive voltage waveform of the first polarity for providing a desired optical state is applied during the first display operation, and a second drive voltage waveform of the second polarity and of the same amplitude as the first drive voltage waveform is applied during the second display operation, the liquid crystal device thereby displaying an image of a higher luminance in the first display operation and another image of a lower but non-zero luminance in the second display operation.