Patent ID: 6118424
Filing Date: 2000-09-12
Classification: G09G

Abstract:
A method of driving a display having a matrix of pixels made of antiferroelectric liquid crystal material and a plurality of scan and signal electrodes facing each other, comprising the steps of:applying scan waveforms to the scan electrodes and signal waveforms to the signal electrodes to drive the antiferroelectric liquid crystal pixels at a peak value;the polarity of the start of the scan waveform applied to the scan electrode of a first one of a plurality of simultaneously scanned lines is opposite to the polarity of the start of the scan waveforms applied to the scan electrodes of the other of the plurality of simultaneously scanned lines;determining, when n lines of the signal electrodes are simultaneously scanned, the voltage signal waveform to be applied to any one of the signal electrodes according to n column vectors of a unit matrix of n rows by n columns with the sign of the first column vector being inverted; andsetting the threshold voltage of the antiferroelectric liquid crystal to an intermediate value between the sum value of the absolute values of the scan voltage waveforms and the signal voltage waveforms and the difference value between the absolute values of the scan voltage waveforms and the signal voltage waveforms.