How does Rear-Projection Television Work?
Like many people, you may be filled with a real desire to know what makes a rear-projection TV work. To be honest, it’s pretty much done with smoke and mirrors. (Just kidding - if there is smoke coming out of your RPTV you have a problem!)
First, a video picture is projected via a projectors lamp inside the TV, then a system of lenses and mirrors redirect the picture onto the internal surface of a see-through screen.
When this technology was first introduced, CRTs (cathode-ray tubes - the things that made old fashioned televisions so bulky) were used, and it worked very well. The only problem with this was that the tube made the chassis very heavy and, typically, a floor-standing cabinet was needed 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 pictures in light, compact cases.
RPTVs have built in high-definition capability nowadays. This is a very important point - they are equipped to handle everything high definition broadcasting and discs can demand of them. And let’s be clear about this - HDTV will provide wide screen television in much greater detail and clarity than we are used to from traditional broadcasting. In addition to tuners for cable and analog television - not to mention being able to receive digital cable signals without the need for a set-top box - HD tuners come as standard with modern RPTVs, which means they can take full advantage of all the exciting television improvements which will be upon us soon.
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