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Proceedings Paper

UHP lamps for projection systems: getting always brighter, smaller, and even more colorful
Author(s): Ulrich Weichmann; Hermann Giese; Ulrich Hechtfischer; Gero Heusler; Achim Koerber; Holger Moench; Folke-Charlotte Noertemann; Pavel Pekarski; Jens Pollmann-Retsch; Arnd Ritz
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Paper Abstract

The past decade has seen a rapid development of projection systems. Projectors as small as only a few liters in size deliver several thousand screen lumens and are, with an efficacy of over 10 lm/W, the most efficient display systems realized today. This has been made possible by breakthroughs in lamp technology, particularly by the development of the UHP-lamp. This broadband light source with its outstanding brightness and lifetimes of over 10000 hours is ideal for projection applications. In this paper we want to describe three major technological trend lines in the development of UHP-lamps over the past decade: First, there is a trend towards brighter projectors, which is fostered by a brightness increase of the UHP-lamps. At the same time, projectors have seen a dramatic reduction in size, which has been made possible mostly by reducing lamp- and driver-size by even a factor of 10. This was only possible by the development of new ignition concepts as well as new optical designs of the reflector. And finally, UHP-lamps have seen quite some improvement in color rendering by using even higher pressures and shorter arc gaps. This allows for more colorful pictures and even more efficient projector designs.

Paper Details

Date Published: 28 May 2004
PDF: 11 pages
Proc. SPIE 5289, Liquid Crystal Materials, Devices, and Applications X and Projection Displays X, (28 May 2004); doi: 10.1117/12.541159
Show Author Affiliations
Ulrich Weichmann, Philips Research Labs. (Germany)
Hermann Giese, Philips Research Labs. (Germany)
Ulrich Hechtfischer, Philips Research Labs. (Germany)
Gero Heusler, Philips Research Labs. (Germany)
Achim Koerber, Philips Research Labs. (Germany)
Holger Moench, Philips Research Labs. (Germany)
Folke-Charlotte Noertemann, Philips Research Labs. (Germany)
Pavel Pekarski, Philips Research Labs. (Germany)
Jens Pollmann-Retsch, Philips Research Labs. (Germany)
Arnd Ritz, Philips Research Labs. (Germany)

Published in SPIE Proceedings Vol. 5289:
Liquid Crystal Materials, Devices, and Applications X and Projection Displays X
Ming Hsien Wu; Liang-Chy Chien, Editor(s)

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