Dera Malvern in talks on LCD technology

Dera Malvern in talks on LCD technology
Steve Bush DERA Malvern is discussing its newly developed LCD technology with several unnamed customers. The technology is a new crystal mode called voltage controlled twist (VCT) which has claimed advantages over the twisted nematic (TN) mode in current use. “The viewing angle of VCT is wider than unmodified TN with no contrast reversal beyond the extremes,” said VCT co-inventor Guy Bryan-Brown. There are other LCD types with viewing angles better than TN. Compensated TN (TN+), used by Sharp and Hosiden, and in plane switching (IPS) are examples. “If you list all the different parameters of the various LCD technologies available, there is no clear winner,” said Bryan-Brown, “VCT is likely to be less expensive to make than competing technologies with similar viewing angles.” VCT LCDs need a diffraction grating processing that is unusual among LCD manufacturers, “but the holographic industry does it all the time,” said Bryan-Brown


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