18 May 2006 Ultrabright head-mounted displays using LED-illuminated LCOS
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We report design and test of a high brightness laboratory-breadboard LED/LCOS HMD system employing a 0.78-inchdiagonal 1280× 768 ferroelectric liquid-crystal-on-silicon microdisplay and a red-green-blue LED. With an 8× viewing optic giving a 35°-diagonal field of view, the system yielded brightnesses greater 40,000 cd/m2 (12,000 fL) in colorsequential mode and greater than 100,000 cd/m2 (30,000 fL) in monochrome mode, at LED power consumptions of 1.1 W and 3.3 W, respectively. The illumination optics employed a rectangular light pipe and tailored diffuser to efficiently fill the microdisplay panel aperture and exit pupil. The high efficiency of such image generators facilitates display readability in see-through HMDs operating in high-ambient-light environments, as well as enabling ultra-low power HMDs (less than 100 mW total) for dismounted users of battery-powered systems.
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Mark A. Handschy, Mark A. Handschy, John R. McNeil, John R. McNeil, Paul E. Weissman, Paul E. Weissman, } "Ultrabright head-mounted displays using LED-illuminated LCOS", Proc. SPIE 6224, Helmet- and Head-Mounted Displays XI: Technologies and Applications, 62240S (18 May 2006); doi: 10.1117/12.668481; https://doi.org/10.1117/12.668481


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