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Proceedings Paper

Uniform LED illuminator for miniature displays
Author(s): Vladimir Medvedev; David G. Pelka; William A. Parkyn
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Paper Abstract

The Total Internally Reflecting (TIR) lens is a faceted structure composed of prismatic elements that collect a source's light over a much larger angular range than a conventional Fresnel lens. It has been successfully applied to the efficient collimation of light from incandescent and fluorescent lamps, and from light-emitting diodes (LEDs). A novel LED-powered collimating backlight is presented here, for uniformly illuminating 0.25'-diagonal miniature liquid- crystal displays, which are a burgeoning market for pagers, cellular phones, digital cameras, camcorders, and virtual- reality displays. The backlight lens consists of a central dual-asphere refracting section and an outer TIR section, properly curved with a curved exit face.

Paper Details

Date Published: 20 October 1998
PDF: 12 pages
Proc. SPIE 3428, Illumination and Source Engineering, (20 October 1998); doi: 10.1117/12.327957
Show Author Affiliations
Vladimir Medvedev, Teledyne Lighting and Display Products, Inc. (United States)
David G. Pelka, Teledyne Lighting and Display Products, Inc. (United States)
William A. Parkyn, Teledyne Lighting and Display Products, Inc. (United States)

Published in SPIE Proceedings Vol. 3428:
Illumination and Source Engineering
Angelo V. Arecchi, Editor(s)

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