Illumination system with aligned LEDs

Details Illumination system with aligned LEDs Illumination system with aligned LEDs

2007-05-01

2007-05-01

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

C359S638000, C353S033000

Reexamination Certificate

active

10789834

ABSTRACT:
A compact illumination system that is suitable for, e.g., projection systems, includes a plurality of light emitting diodes that are aligned along the same axis. The illumination system includes mirrors and a filter system for combining the light emitted by the different light emitting diodes. The light emitting diodes may be mounted within the same plane, e.g., on the same heatsink, which simplifies assembly and alignment of the system. Moreover, a collimator system with integrally formed refractive and/or reflective collimators, may be used. The use of an integrally formed collimator system advantageously reduces the number of piece parts and simplifies assembly.

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G.Harbers, M. Keuper, S. Paolini, “High Power LED illuminator for Data and Video Projection”, Proceedings of The 9th international Display Workshops, Hiroshima, Japan, pp. 501-504 (2002).
G. Harbers, M. Keuper, S. Paolini, “Performance of High-Power LED Illuminators in Projection Displays”, MicroDisplay 2002, Digest of Papers, Westminster, Colorado, USA, pp. 22-25 (2002).
M. Keuper, G.Harbers, S. Paolini, “Ultra-compact LED based Image Projector for Portable Applications”, SID Internation Symposium, Techn. Digest of Papers, pp. 713-715 (2003).

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