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Proceedings Paper

Performance of NCAP projection displays
Author(s): Philip J. Jones; Akira Tomita; Mark Wartenberg
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Paper Abstract

Prototypes of projection displays based on dispersions of liquid crystal in polymer matrices are beginning to appear. The principle of operation depends on electrically switchable light scattering. They are potentially much brighter than current cathode ray tube (CRT) or twisted nematic liquid crystal (TN LC) cell based displays. Comparisons of efficacy and efficiency show this. The contrast and brightness of such displays depend on a combination of the f- number of the projection system and the scattering characteristics of the light valve. Simplified equations can be derived to show these effects. The degree of scattering of current NCAP formulations is sufficient to produce good contrast projection displays, at convenient voltages, that are around three times brighter than TN LC projectors because of the lack of polarizers in the former.

Paper Details

Date Published: 1 August 1991
PDF: 9 pages
Proc. SPIE 1456, Large Screen Projection, Avionic, and Helmet-Mounted Displays, (1 August 1991); doi: 10.1117/12.45414
Show Author Affiliations
Philip J. Jones, Raychem Corp. (United States)
Akira Tomita, Raychem Corp. (United States)
Mark Wartenberg, Raychem Corp. (United States)


Published in SPIE Proceedings Vol. 1456:
Large Screen Projection, Avionic, and Helmet-Mounted Displays
Harry M. Assenheim; Richard A. Flasck; Thomas M. Lippert; Jerry Bentz, Editor(s)

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