RPTVs Demystified
Tuesday, March 2nd, 2010Like many people, you may be filled with a burning curiosity to know what makes an RPTV work. Well, it’s largely done with smoke and mirrors. (Just kidding – if there is smoke inside your rear-projection TV you have a serious problem!)
First, a video picture is projected via a projectors lamp inside the television, then a system of lenses and mirrors redirect the image onto the inside surface of a translucent screen.
When this technology was first developed, CRTs (cathode ray tubes – responsible for making old fashioned TVs so bulky) were used, and it worked quite well. The only problem with this was that the tube made the chassis very heavy and, usually, a floor-standing cabinet was required to accommodate it.
Eventually,In the end, as screens grew larger, and the industry began to adopt the new, wider 16:9 aspect ratio (the ratio of height to width), those old CRT monsters gradually became replaced by new models which deliver top quality performance in compact, light cases.
Rear-projection TVs have built in high definition capability these days. This is an extremely important point – they come equipped to handle everything HDTV broadcasting and discs can throw at them. And make no mistake – High-Definition TV will produce wide screen images in much greater clarity and detail than we are used to from traditional broadcasting. In addition to tuners for analog and cable television – not to mention the ability to receive digital cable signals without the need for a set top box – high definition tuners are included in all modern rear projection TVs, which means they can take full advantage of all the exciting television innovations which will be with us in the near future.
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