How do Rear-Projection TVs Work?

Like most people, you may be filled with a burning curiosity to know what makes a rear-projection TV work. To be honest, it’s largely done with smoke and mirrors. (Only joking – if there is smoke inside your rear projection television you have a serious problem!)

First, a video image is projected via a projectors lamp inside the television, then a system of lenses and mirrors redirect the picture onto the inner surface of a see-through screen.

When this technology was first introduced, CRTs (cathode ray tubes – the things that made old-fashioned TVs so bulky) were used, and it worked very well. The only problem with this was that the tube made the chassis extremely heavy and, often, a floor-standing cabinet was required to accommodate it.

So, as screens grew larger, and the industry began to take up the new, wider 16:9 aspect ratio (the ratio of height to width), those old CRT boxes gradually became replaced by newer models which deliver high-quality pictures in light, compact enclosures.

Rear-projection TVs 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 make no mistake – High Definition Television will produce wide screen images in much more 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 unencrypted digital cable signals without requiring a set-top box – HD tuners are included in all modern rear projection TVs, which makes them capable of taking full advantage of all the exciting television innovations which will be with us soon.

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