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Laser Phosphor Display (LPD) is a large-format display technology that is similar to cathode ray tube (CRT) technology but uses lasers instead of an electron gun to activate the phosphors that create the images.〔("Definition of: Laser Phosphor Display" ). ''PCMag.com''〕 LPD was invented and patented by Prysm, Inc. LPD competes with liquid crystal display (LCD), plasma display panel (PDP), and other large-format display technologies.〔Desmarais, Martin. ("Picture Perfect" ). ''IndUS Business Journal'', 2010-09-03〕 LPD uses a set of movable mirrors to direct light from several ultra-violet lasers onto a screen made of a plastic-glass hybrid material coated with color phosphor stripes. The lasers scan the screen line by line from top to bottom. The energy from the lasers' light activates the phosphors, which emit photons, producing an image.〔Greene, Kate. ("A New Breed of Laser TV" ). ''MIT Technology Review'', 2010-01-20〕 The technology was unveiled in January 2010,〔 and in June 2010, the first embodiment of this technology, the TD1 Tile, was launched.〔Hall, Christopher. ("InfoComm: Prysm showcases 'ecovative' thinking with TD1 displays" ). ''DigitalSignageToday.com'', 2010-06-21〕 The TD1 tile is a 25 inch diagonal, bezel-free, tile-based building block. A variable number of TD1 Tiles can be arranged in arbitrary configurations to form videowalls in various sizes and shapes.〔(TD1 Tile Product Specification Sheet ). Prysm.com〕 Prysm began shipping TD1 tiles in February 2011.〔(Prysm Announces It Is Shipping Brilliant, Stackable Display Tiles ). Prysm.com, 2011-02-25〕 The first LPD retail installation went on display at American Eagle Outfitters in New York in late 2010.〔Clancy, Heather. ("Retailer picks Prysm displays for their eco-friendly visual punch" ). ''ZDNet'', 2011-01-19〕 Other LPD deployments include a 120-foot long videowall at InterActiveCorp (IAC) in New York,〔("Prysm LPD technology at heart of largest videowall" ). ''Installation'', 2012-10-11〕 a 40-foot, 180-degree, interactive videowall at General Electric’s (GE) Customer Experience Center in Toronto,〔Cardinal, David. ("Think you have a big screen TV? Check out these monster video walls" ). ''ExtremeTech'', 2012-11-23〕 and several videowalls for Dubai TV.〔Cherian, Vijaya. ("Dubai TV invests in two additional Prysm LPD monitors" ). ''BroadcastPro Middle East'', 2012-05-03〕 LPD requires less electricity than competing technologies including LCD and light-emitting diode (LED).〔Roush, Wade. ("At American Eagle, Prysm's Laser Displays Banish the Bezel; Startup to Present at Tonight's 5×5 Event" ). ''Xconomy'', 2010-12-08〕 IAC reported a 70% reduction in power by switching to LPD,〔Brousell, Lauren. ("Great Wall of Video" ). ''CIO'', 2012-11-15〕 and Prysm says LPD uses up to 75 percent less power than most other display technologies on the market.〔 According to Prysm, LPD technology has other advantages including great black levels, a wide 180-degree viewing angle, a 65,000-hour panel life with no burn-in issues, completely recyclable components, and their production process is mercury free. One disadvantage of LPD is that the displays are deeper than some competing technologies,〔Taub, Eric A. ("Is LPD the Next LCD?" ). ''The New York Times'', 2010-01-12〕 each TD1 Tile including all peripherals measures almost 17 inches deep.〔 Depending on the frame type, the total installed depth varies between 24 and 30 inches.〔(Standard Frame Product Specification Sheet ). Prysm.com〕〔(Premium Frame Product Specification Sheet ). Prysm.com〕 == References == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Laser-powered phosphor display」の詳細全文を読む スポンサード リンク
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