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

Metadata

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.
bio
William E. Glenn is Director of the NASA Space Communications Technology Center, as well as Distinguished Research Professor, Motorola Endowed Professor for Electrical and Computer Engineering, and Director of the Imaging Systems Laboratory, all at Florida Atlantic University (FAU) in Boca Raton. The ISL and SCTC specialize in advanced imaging and communications technology. — Dr. Glenn received a B.E.E. from the Georgia Institute of Technology, and M.S. and Ph.D. degrees in electrical engineering from the University of California at Berkeley. Previously, he served as Director of the NYIT Science and Technology Research Center and as vice-president and director of research at CBS Laboratories, where he worked very closely with Dr. Dennis Gabor, a Nobel Prize winner, on systems using holographic techniques. Prior to that time, Dr. Glenn was on the staff of the General Electric Research Laboratory, where he developed two totally new types of electro-optical imaging systems, the light-valve Talaria projector and thermoplastic recording. — Dr. Glenn is a Fellow of the SMPTE. He currently holds 110 U.S. patents and has written or co-authored over 65 technical papers in the areas of imaging and communications technology. In 1991 he was recognized with the Society's Agfa-Gevaert Gold Medal Award for his contributions in the research and development of imaging systems. Glenn has served on the Advanced Television Standards Committee (ATSC) since 1980, and on the FCC Advisory Committee to recommend terrestrial HDTV broadcast standards since 1987.
C. E. HoltonWilliam E. Glenn (who read the paper) and Carvel Holton are with the Communications Technology Center, Florida Atlantic University, Boca Raton, Fla.
bio
Carvel E. Holton is a research associate at the Fiber and Electro-Optics Research Center, Virginia Polytechnic and State University, Blacksburg, Va. He holds B.S.E.E. and M.S.E.E. degrees in electrical engineering and electro-physics from the University of Maryland. Holton was involved in the development of state-of-the-art electronics, electro-optics, and systems as a member of the staff of the Naval Surface Warfare Center. He served as senior engineer at the U.S. Naval Academy, United Technologies Research Center, United Technologies Optical Systems, and the Imaging Systems Laboratory at Florida Atlantic University before joining the Fiber and Electro-Optics Research Center at Virginia Tech. — His experience in electronics includes significant design and program work in digital circuits, analog circuits, RF circuits, and instrumentation systems. In electro-optics, he has participated in the development of numerous instrumentation systems based on visible and IR lasers, including CO2 and fiber-optic based lasers and systems. Holton has most recently participated in the development of diffractive liquid crystal projectors based on arc and laser sources at FAU. Holton is a member of SID and SPIE and has published in such diverse areas as hydrodynamics research, liquid crystal projection systems, and Lidar systems.
G. J. DixonG. J. Dixon is with the Center for Research and Education in Optics and Lasers (CREOL), University of Central Florida, Orlando, Fla.
bio
G. J. Dixon is on the faculty of the Center of Research and Education in Optics and Lasers (CREOL) at the University of Central Florida in Orlando where his group has developed a number of new diode-pumped solid-state lasers, including the pump-resonant sum frequency laser and the mid-IRA intra-cavity difference frequency laser. He holds a B.S. in physics from Eckerd College, a B.S. in electrical engineering from the University of Tennessee, an M.S. in applied physics from Stanford University, and a Ph.D. in electrical engineering from the University of South Florida. — While a student at Stanford, Dixon was involved in the early development of intracavity-doubled diode-pumped solid-state lasers. He then worked for Amoco Laser Co. on diode-pumped visible lasers. Since 1990 he has been on the faculty of CREOL. — Dr. Dixon currently serves on the Editorial Advisory Board of Laser Focus World and is a member of the Industrial Design Society of America. He holds 16 patents in the areas of diode-pumped solid-state lasers and resonant nonlinear frequency conversion.
P. J. BosPhilip J. Bos is with the Liquid Crystal Institute, Kent State University, Kent, Ohio.
bio
Philip J. Bos is Associate Professor at Kent State University in Kent, Ohio. He received his Ph.D. in physics from Kent State in the area of orientational order of liquid crystals. Dr. Bos worked in the display research department of the corporate research laboratories of Tektronix Inc. from 1979 to 1993, following which he received a joint appointment as senior research fellow at the Liquid Crystal Institute and associate professor of chemical physics at Kent State University. His area of interest is applications of liquid crystals, and he has made contributions in the areas of fast switching devices, wide viewing angle devices, bistable smectic and nematic devices, and polymer stabilized devices.
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
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