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<!-- Image with unknown copyright status removed: [[Image:6ribbons GLV.JPG|300 px|thumb|Figure1: The GLV Device with alternate ribbons deflected to form a dynamic diffraction grating]] -->
 
Silicon Light Machines (SLM), in Sunnyvale CA, markets and licenses GLV technology with the capitalised trademarks '''Grated Light Valve''' and GLV, previously Grating Light Valve.<ref>{{Cite web|quote=our patented Grated Light Valve (GLV) modules|url=http://www.siliconlight.com/htmlpgs/homeset/homeframeset.html|title=Home page|publisher=Silicon Light Machines|accessdate=April 23, 2010}}</ref><ref name=sid98>{{Citation|url=http://www.siliconlight.com/webpdf/sid98.pdf|title=GLV Technology: Update and Novel Applications|authors=D. T. Amm, R. W. Corrigan, Silicon Light Machines, Sunnyvale, CA |work=[[Society for Information Display]] Symposium|date=19 May 1998|location=Anaheim, CA|archiveurl=http://web.archive.org/web/20040806064731/http://www.siliconlight.com/webpdf/sid98.pdf|archivedate=2004-08-06}}</ref> The valve diffracts [[laser]] light using an array of tiny movable ribbons mounted on a silicon base. The GLV uses six ribbons as the [[diffraction]] gratings for each pixel. The alignment of the gratings is altered by electronic signals, and this displacement controls the intensity of the diffracted light in a very smooth gradation.
 
==Brief history==
The light valve was originally developed at [[Stanford University]], in California, by electrical engineering professor David M. Bloom, along with William C. Banyai, Raj Apte, [[Francisco Sandejas]], and Olav Solgaard. In 1994, the start-up company [[Silicon Light Machines]] was founded by Bloom to develop and commercialize the technology. The company is now wholly owned by Dainippon Screen Manufacturing Co., Ltd.<ref>[http://www.screen.co.jp/press/NR080702E.pdf Dainippon Screen Mfg. Co., Ltd.]</ref>
 
In July 2000, [[Sony]] announced the signing of a technology licensing agreement with SLM<ref>[http://www.sony.net/SonyInfo/News/Press_Archive/200206/02-023E/ Sony Develops a Grating Light Valve display device that gives high resolution, excellent contrast ratio and wide color reproduction]</ref><ref>[http://meko.co.uk/glv.shtml Sony Signs Technology License Agreement with SLM]</ref> for the implementation of GLV technology in laser projectors for large venues,<ref>[{{cite web|url=http://www.hdtvexpert.com/pages/glv.htm |date=2005-06-23|title=SAY, ISN'T THAT ELVIS? The Grating Light Valve emerges from hiding in Salt Lake City]. Retrieved |accessdate=2008|archiveurl=http://web.archive.org/web/20051126211347/http://www.hdtvexpert.com/pages/glv.htm|archivedate=2005-11-26}}</ref> but by 2004 Sony announced the SRX-R110 front projector using its own LCoS-based technology [[SXRD]].
SLM then partnered with [[Evans & Sutherland]] (E&S). Using GLV technology, E&S developed the E&S Laser Projector, designed for use in domes and planetariums.<ref>[http://www.es.com/products/digital_theater/digistar3-laser.asp Digistar 3 Laser]</ref> The E&S Laser Projector was incorporated into the [[Digistar 3]] dome projection system.