Recent developments in materials for TFT/PDLC devices

David Coates; S. Greenfield; Mark Goulding; E. Brown; Patrick Nolan

doi:10.1117/12.151202

13 August 1993 Recent developments in materials for TFT/PDLC devices

David Coates, S. Greenfield, Mark Goulding, E. Brown, Patrick Nolan

Proceedings Volume 1911, Liquid Crystal Materials, Devices, and Applications II; (1993) https://doi.org/10.1117/12.151202
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States

Abstract

Liquid crystal mixtures for use over an active matrix substrate must have a high resistivity and, to maintain high value during the lifetime of the display, the materials must be very stable. Many such liquid crystal mixtures are known and used in twisted nematic displays but they are of low birefringence; very few high birefringence liquid crystals of this type are known. Several classes of liquid crystal which fulfill these criteria have been developed and formulated into low melting point mixtures suitable for use with UV curing prepolymers. The properties of PDLC films containing these new mixtures show that the high birefringence values now possible can lead to substantially increased contrast ratios.

Citation Download Citation

David Coates, S. Greenfield, Mark Goulding, E. Brown, and Patrick Nolan "Recent developments in materials for TFT/PDLC devices", Proc. SPIE 1911, Liquid Crystal Materials, Devices, and Applications II, (13 August 1993); https://doi.org/10.1117/12.151202

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