Liquid crystal driving systems

Details Liquid crystal driving systems Liquid crystal driving systems

1987-07-17

1990-01-09

Moore, David K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340805, 340811, 350333, G09G 300

Patent

active

048931179

ABSTRACT:
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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Coates, et al, "Electrically induced scattering textures in smectic A phases and their electrical reversal", Journal Physics D: Applied Physics, vol. II, pp. 1-10, 1978.

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