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Title: Digital Projection in Your Home Thea ter Word Count: 724 Summary: If you are looking at digital RPTVs and your viewing room can accommod ate a 90" or 100" screen, don't ove rlook the possibility of a projecto r and screen instead. Keywords: projector, projection, digital, tv, television, home theater, rear pro jection Article Body: A projector is a device that integr ates a light source, optics system, electronics and display(s) for the purpose of projecting an image fro m a computer or video device onto a wall or screen for large image vie wing. There are hundreds of product s available in the market and they are differentiated by their resolut ion, performance and features. Thes e devices can be attached to a comp uter or video device just as you wo uld connect a traditional monitor. The term "big screen" is used to in dicate a TV size larger than 40 inc hes in diagonal measurement. Until recently these are usually rear-pro jection screens, although we are se eing more and more flat-panel displ ays at competitive prices. <b>The appeal of Rear-Projection TV (RPTV)</b> There certainly is a great deal of consumer appeal for RPTVs these day s. And it's easy to understand. Par t of it is due to the simplicity of the product. After all, what could be easier than getting a bigger TV ? If you want a larger image with n o muss and fuss, it can be purchase d from any local big-screen retaile r and delivered within a day or two. Another the appeal of RPTVs is the impression created by big-screen re tailers that RPTVs are cheaper than front projection systems. Clearly there is a market for both types of home theater solutions. Fr om a practical perspective your roo m size has a lot to do with determi ning which approach is best for you . If you don't have a large viewing room, a 40" to 60" diagonal TV wil l probably be plenty. In this case, the rear-projection solution is mo re practical assuming you can fit t he box into the space. But if you want the large screen ci nema experience and your room size will allow it, front projection is the way to go. Front projectors are made to produce screen images in t he range of 70" to 120" diagonal or more. Once people realize they can get a picture up to four times the size for the same money as a good RPTV, it opens up a whole new world of entertainment possibilities. <b>How good is the Rear-Projection T V:</b> As noted above, the advantages of R PTVs are obvious. There is a wide a rray of products in different sizes and price ranges. There are usuall y several local showrooms in most a reas. And they are simple to buy an d install. However, RPTVs have several limitat ions that front-projection systems do not. Among them are limited scre en size, poor viewing angles, exces sive reflections, poor aspect ratio management, and loss of floor spac e. Screeb size is an obvious differenc e, but still worth thinking about f or a moment. A 100" diagonal front projection screen is four times the surface area of a 50" RPTV. If you want to put real "theater" in your home theater, the projector and mo vie screen approach delivers it. RP TVs are just big televisions. Digital Projectors A digital projector is an electro-o ptical machine which converts image data from a computer or video sour ce to an image which is then displa yed on a distant wall or screen usi ng a lens system. A typical resolut ion for a portable projector will b e the SVGA standard (800×600 pixels ), with more expensive devices supp orting XGA (1024×768 pixels). The c ost of a device is not only determi ned by its resolution, but also by its brightness. For use in large co nference rooms the brightness shoul d be between 1,000 and 4,000 ANSI l umens. There are four competing digital pr ojection technologies: high intensi ty CRT, LCD projectors using LCD li ght gates, Texas Instruments' DLP t echnology and LCOS or liquid crysta l on silicon. In 2004 and 2005, LCD front projection has been enjoying a come-back because of the additio n of the dynamic iris which has imp roved contrast up to the levels of DLP. There is a genuine market for both RPTVs and projectors for home theat er. RPTVs are simple, but they have limitations in screen size and per formance. Projectors and screens re quire some installation work, but o nce it is done you end up with a mo re dramatic theater experience. The bottom line is this: if you are looking at digital RPTVs and your viewing room can accommodate a 90" or 100" screen, don't overlook the possibility of a projector and scre en instead. If you can afford a dig ital RPTV, you can afford a project or. And dollar for dollar the proje ctor will often deliver the maximum "wow" factor for the money invested.
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