Stc, Inc

Ewen R Huffman

Peter F Blomley

Peter J Ayliffe

Gregory W Yuen

A drive circuit for a liquid crystal display uses a sampling technique to derive drive signals from a pair of input waveforms. The waveforms comprise positive going and negative going trapezoidal pulses. By sampling the waveforms at appropriate points, single cycle AC signals and zero voltage signals can be provided. The technique subjects the drive circuit to a voltage stress that is lower than that provided by conventional techniques.

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Bishop's Stortford, United Kingdom

Ewen R Huffman