Performance of NCAP projection displays

Philip J. Jones; Akira Tomita; Mark Wartenberg

doi:10.1117/12.45414

1 August 1991 Performance of NCAP projection displays

Philip J. Jones, Akira Tomita, Mark Wartenberg

Proceedings Volume 1456, Large Screen Projection, Avionic, and Helmet-Mounted Displays; (1991) https://doi.org/10.1117/12.45414
Event: Electronic Imaging '91, 1991, San Jose, CA, United States

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.

Citation Download Citation

Philip J. Jones, Akira Tomita, and Mark Wartenberg "Performance of NCAP projection displays", Proc. SPIE 1456, Large Screen Projection, Avionic, and Helmet-Mounted Displays, (1 August 1991); https://doi.org/10.1117/12.45414

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