Middle school teacher (and his student) getting lost in too many types of data projector for research project, having trouble figuring out when the first portable data projectors hit the market, and related ideas -- cost, etc. Anyone help us find our way to the relevant article? Thanks... Jfarber 18:49, 8 March 2007 (UTC)Reply[reply]
As to how far back to look, Don Lancaster published plans for a TV Typewriter in 1973 with improved kits available in 1975 with a serial input, so the technology was there to convert ASCII to video on any TV screen. By about 1975 people had home built "portable" computers. By 1981 there was the Osborne and by 1982 the Kaypro, commercially made 29 pound or so portable computers (hardly laptops). Then see " Movies in the Sky with V-Star 3 " Rosenberg, Hilary. Financial World. New York: Aug 31, 1983.Vol.152, Iss. 15; pg. 29, 2 pgs obtained (subscription) from Proquest.comSays that airliners had video projectors for inflight movies and the V-Star 4, was a land-based version of the inflight V-Star 3, which could be used with computer systems for teleconferencing. The article said that competitive data projector systems cost $60,000, but the . The V-Star 4 could be had for $13,000. It was manufactured by Barco Electronics of Belgium. You can see the inflight version at E-Bay at [36] and it is clearly portable, being no wider or taller than the lenses, and way smaller than the earlier Advent video projector. I expect that like any invention there would be competing claims to the invention based on some tinkerer interfacing his 1974 Altair home build computer to a portable TV, then putting a projection lens in front of the TV, and projecting data onto a screen for a science fair or computer club meeting in 1975, or perhaps doing the same projection lens in front of the portable 1950 TV or oscilloscope and somehow hooking it up to a primitive analog or digital computer of that era to display some sort of output. You have to decide when something is "invented" on a basis of commercially available, or simply reduced to practice, or impractical but showing the basic principle, and then there are the wild claims of people that they invented the thing decades ago but the invention was stolen or suppressed.You specified "commercial" which helps to eliminate the first efforts. So now the trick is to see if there was anything prior to the Barco Vstar 4. There were certainly earlier commercial video projectors, and I saw them set up and removed for special showings like an away football game broadcast on TV by 1970, but it took a couple of guys to haul it in and out. Someone somewhere could have used one of those for data projection in the early 1970's. "In-Flight Movies Update Content and Equipment" By Aljean Harmetz, New York Times Apr 27, 1982. pg. C11, 1 pgs says that as of that date there were 465 airplanes with video projectors for inflight movies. The first New York Times story about video data projectors was "Who Lives by Technology Dies -- Slowly -- by Technology; Portables are so useful when giving speeches -- but only if they work. byPeter H. Lewis. New York Times Aug 16, 1992. pg. F10, 1 pgs . It said that "the latest" LCD projectors with their own light sources, capable of photo quality video and data projection, for connection to computers, cost $6,000 to $8,000, and mentioned the earlier LCD projectors which went on the screen of an overhead projector. Edison 20:50, 9 March 2007 (UTC)"Edison 16:32, 9 March 2007 (UTC)Reply[reply]
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