High-Efficiency Light Valve Projectors and High-Efficiency Laser Light Sources

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: SMPTE J
Volume: 106, No. 4, pp. 210–216
Abstract: The optical efficiency of an active matrix liquid crystal display (AMLCD) light valve projector is determined by the optical design, the method of modulation, and the efficiency of the light source. This paper describes a new projector with an efficient modulation technique, which can employ unpolarized light by using a unique diffraction grating formed in a liquid crystal panel. The technique uses a Schlieren optical system and has been tested with xenon arcs, metal halide arcs, and efficient solid-state laser light sources. The optical system reduces laser speckle significantly when highly coherent laser sources are used. All source combinations exceeded 3 lm/W for white light projection performance, and the experimental results of the combinations are discussed. This modulation technique obtains a high contrast ratio with smaller panels than can be achieved with rotation-of-polarization light valve projectors.
Publication Date: 1997-04-01
DOI: 10.5594/J00564
ISSN: Print: 0036-1682
Link: https://doi.org/10.5594/J00564
Author(s): W. E. GlennWilliam E. Glenn (who read the paper) and Carvel Holton are with the Communications Technology Center, Florida Atlantic University, Boca Raton, Fla.
C. E. HoltonWilliam E. Glenn (who read the paper) and Carvel Holton are with the Communications Technology Center, Florida Atlantic University, Boca Raton, Fla.
G. J. DixonG. J. Dixon is with the Center for Research and Education in Optics and Lasers (CREOL), University of Central Florida, Orlando, Fla.
P. J. BosPhilip J. Bos is with the Liquid Crystal Institute, Kent State University, Kent, Ohio.
Copyright: © 1997 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Glenn W. E. , “Real-Time Display Systems, Present and Future,” in Visual Science and Engineering: Models and Applications , Kelly D. H. , ed., pp. 387 – 413 , Marcel Dekker : New York , 1994 . EXTERNAL
2. Yuyama I. , “II Fundamental Requirements for High Definition Television Systems, Large Screen Effects,” NHK Technical Monograph , 32 , June 1982 . EXTERNAL
3. Bos P. J. , “An Optically Active Diffractive Device for a High-Efficiency Light Valve,” presented at the SID Symposium, Orlando, Fla., May 1995 . EXTERNAL
4. Wigley P. G. , “High Power 467 nm Passively-Locked Signal-Resonant Sum Frequency Laser,” Conf. on Lasers and Electro-optics, Baltimore, Md., May 1995 . EXTERNAL
5. Geels R. S. , “Advances in High-Power Visible Laser Diodes,” presented at SPIE Photonics West, San Jose, Calif., Feb. 1995 . EXTERNAL

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W. E. Glenn, C. E. Holton, G. J. Dixon, and P. J. Bos; High-Efficiency Light Valve Projectors and High-Efficiency Laser Light Sources, SMPTE Journal ( Volume: 106, Issue: 4, April 1997); SMPTE, 1997. Available at https://doi.org/10.5594/J00564

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W. E. Glenn, C. E. Holton, G. J. Dixon, and P. J. Bos; High-Efficiency Light Valve Projectors and High-Efficiency Laser Light Sources, SMPTE Journal ( Volume: 106, Issue: 4, April 1997); SMPTE, 1997. Available at https://doi.org/10.5594/J00564

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<span class="citation">W. E. Glenn, C. E. Holton, G. J. Dixon, and P. J. Bos; <cite>High-Efficiency Light Valve Projectors and High-Efficiency Laser Light Sources</cite>, SMPTE Journal ( Volume: 106, Issue: 4, April 1997); SMPTE, 1997. Available at <a href="https://doi.org/10.5594/J00564" target="_blank" rel="noopener">https://doi.org/10.5594/J00564</a></span>

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W. E. Glenn, C. E. Holton, G. J. Dixon, and P. J. Bos; <cite id="bib-10-5594-j00564">High-Efficiency Light Valve Projectors and High-Efficiency Laser Light Sources</cite>, SMPTE Journal ( Volume: 106, Issue: 4, April 1997); SMPTE, 1997
<span class="doi">10.5594/J00564</span>
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