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Proceedings Paper

Solar Radiation Control Using NCAP Liquid Crystal Technology
Author(s): Peter vanKonynenburg; Stephen Marsland; James McCoy
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Paper Abstract

A new, advanced liquid crystal technology has made economical, large area, electrically-controlled windows a commercial reality. The new technology, Nematic Curvilinear Aligned Phase (NCAP), is based on a polymeric material containing small droplets of nematic liquid crystal which is coated and laminated between transparent electrodes and fabricated into large area field effect devices. NCAP windows feature variable solar transmission and reflection through a voltage-controlled scattering mechanism. Laminated window constructions provide the excellent transmission and visibility of glass in the powered condition. In the unpowered condition, the windows are highly translucent, and provide 1) blocked vision for privacy, security, and obscuration of information, and 2) glare control and solar shading. The stability is excellent during accelerated aging tests. Degradation mechanisms which can limit performance and lifetime are discussed. Maximum long term stability is achieved by product designs that incorporate the appropriate window materials to provide environmental protection.

Paper Details

Date Published: 12 November 1987
PDF: 8 pages
Proc. SPIE 0823, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VI, (12 November 1987); doi: 10.1117/12.941885
Show Author Affiliations
Peter vanKonynenburg, Taliq Corporation (United States)
Stephen Marsland, Taliq Corporation (United States)
James McCoy, Taliq Corporation (United States)

Published in SPIE Proceedings Vol. 0823:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion VI
Carl M. Lampert, Editor(s)

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