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Proceedings Paper

Miniature 1280 by 1024 active matrix liquid crystal displays
Author(s): Ronald P. Gale; Frederick Herrmann; Jason Lo; Martin Metras; Bor-Yeu Tsaur; Alan Richard; David Ellertson; Kuojoing Tsai; Ollie C. Woodard; Matthew Zavracky; Michael J. Presz
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Paper Abstract

A miniature 1280 by 1024 transmissive active matrix liquid crystal display (AMLCD) was developed for the RAH-66 Comanche helicopter head-mounted displays and other military applications. The display has an active area of 15.4 mm by 12.3 mm with a diagonal of 19.7 mm (0.77 inches). The display has a 12 micrometer pixel pitch, yet a clear optical aperture of over 30% was achieved by using a 0.8 micrometer CMOS design rule for the active-matrix circuit fabrication. The fabrication process used was similar to that of Kopin's commercial CyberDisplay AMLCD's, which produces high performance, high reliability devices. To achieve low temperature operation to -40 C, the display was designed with an integrated thermal sensor to allow control of a heater. Display test results include contrast ratios over 100, continuous gray scale, fast response times for 60 Hz operation, and the ability to show both gray-scale images and symbology at display luminescence levels over 2,000 foot- Lamberts brightness. This latter result will enable this display to be used in systems with full sunlight readability requirements. The design, fabrication, and characterization of this display are discussed.

Paper Details

Date Published: 12 July 1999
PDF: 7 pages
Proc. SPIE 3689, Helmet- and Head-Mounted Displays IV, (12 July 1999); doi: 10.1117/12.352835
Show Author Affiliations
Ronald P. Gale, Kopin Corp. (United States)
Frederick Herrmann, Kopin Corp. (United States)
Jason Lo, Kopin Corp. (United States)
Martin Metras, Kopin Corp. (United States)
Bor-Yeu Tsaur, Kopin Corp. (United States)
Alan Richard, Kopin Corp. (United States)
David Ellertson, Kopin Corp. (United States)
Kuojoing Tsai, Kopin Corp. (United States)
Ollie C. Woodard, Kopin Corp. (United States)
Matthew Zavracky, Kopin Corp. (United States)
Michael J. Presz, Kopin Corp. (United States)


Published in SPIE Proceedings Vol. 3689:
Helmet- and Head-Mounted Displays IV
Ronald J. Lewandowski; Loran A. Haworth; Henry J. Girolamo, Editor(s)

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