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Proceedings Paper

Improved display optical performance with notch polarizers and specialized lamps for helmet-mounted display application
Author(s): Bill Heinze
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Paper Abstract

The helmet mounted display (HMD) is an important technology for aircraft cockpit information exchange, and is also of advantage for outdoor field use. For both applications, high display luminance is required to maintain acceptable contrast ratio while competing with environmental forward field scene luminance during bright daylight conditions. For the full color HMD, a broad color gamut is required. Notch Polarizers, made from crosslinked cholesteric liquid crystal silicones and utilized to modulate color with high resolution subtractive color twisted nematic diplay image sources, yield substantial improvements in system luminance efficiency, color gamut, and contrast ratio, compared with conventional color polarizers made with dichroic dyes. A TN subtractive color display system design with notch polarizers is presented, resulting in improved luminance, color gamut, contrast ratio, and contrast ratio in the presence of high ambient luminance. Results are given for backlighting with a broad band Xenon arc lamp, as well as with a trichrominance (primary color) lamp. Very substantial improvements in display system luminance efficiency, color gamut and contrast ratio were achieved.

Paper Details

Date Published: 7 June 1996
PDF: 9 pages
Proc. SPIE 2735, Head-Mounted Displays, (7 June 1996); doi: 10.1117/12.241901
Show Author Affiliations
Bill Heinze, Honeywell Technology Ctr. (United States)

Published in SPIE Proceedings Vol. 2735:
Head-Mounted Displays
Ronald J. Lewandowski; Loran A. Haworth; Wendell Stephens; Henry J. Girolamo, Editor(s)

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