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Proceedings Paper

Collimated fluorescent backlights for LCD direct viewing
Author(s): Jack R. Biles
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Paper Abstract

The TSTNTM (triple super twisted nematic) LCD is a successful method for obtaining color by stacking three panels, each of which subtracts out a primary color. Because the individual pixels of the three panels must line up to form one fully colored pixel, collimated light is needed. Incandescent lamps are easy to collimate, but are not as popular as fluorescent lamps in the display industry because of poorer efficacy, lifetimes, and color saturation. Fluorescent lamps are inherently diffuse sources that are difficult to collimate. By covering the inside of a hot cathode fluorescent lamp with a reflective MgO layer, small apertures can be made as bright as 50,000 foot lamberts. Individual lenses, centered on each aperture, can collimate these apertured sources.

Paper Details

Date Published: 13 August 1993
PDF: 6 pages
Proc. SPIE 1911, Liquid Crystal Materials, Devices, and Applications II, (13 August 1993); doi: 10.1117/12.151215
Show Author Affiliations
Jack R. Biles, In Focus Systems (United States)

Published in SPIE Proceedings Vol. 1911:
Liquid Crystal Materials, Devices, and Applications II
Uzi Efron; Michael D. Wand, Editor(s)

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