DLP systems are based on micromirror technology _a DLP chip (the basis of the projector) is an optical semiconductor with millions of tiny mirrors controlled by the logic portion of the chip. Basically these tiny little mirrors are individually controlled and tilted to reflect an amount of light corresponding to the picture brightness required for a single pixel of video. The angle of the mirror is changed to move from black (or close to black) _where no light is reflected onto the screen, through a whole range of grays right on up to white.

With a DLP, color is added with a separate device known as the color wheel _a set of red, green and blue filters arranged in a wheel that is located in the path of light reflecting off the mirrors in the DLP chip _these three colors mixed together produce the colors found in your HDTV’s source material.

Some really expensive DLP projectors (like those used in movie theaters) use three DLP chips (one each for red, green and blue) instead of a color wheel. This system reproduces an even greater number of colors and tends to provide a smoother image on-screen.

DLP-projection TVs are, as we mentioned, about the hottest thing on the market today. They are very thin (some less than 6 or 7 inches, nearly in plasma territory), produce a bright, beautiful picture, with better than LCD black reproduction, and excellent color reproduction.

When you’re choosing a DLP-based projection system, be sure to read the fine print. Not all DLP systems are HDTVs _some inexpensive projectors (mainly front-projection systems) use older DLP chips that don’t reach HDTV resolutions. The DLP chip “HD2+”, which provides 1,280-by-720 resolution (this perfectly matches 720p resolution requirements).

Most people don’t notice, but we should warn you about a situation with DLPs called the rainbow effect. This is caused by the spinning color wheel, and can cause a very small percentage of thepopulation to feel dizzy, or get a headache, while watching DLP _particularly when moving their heads, or during rapidly moving scenes on-screen.

Most people don’t have any problem with this rainbow effect, and most people who own DLP HDTVs love them and never deal with this problem at all!

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You can have too much HDTV (believe it or not) and the wrong type of TV for your intended use. Before you plunk down a lot of money on your well-earned HDTV surprise, make sure you’re the best- informed buyer out there. Read on.When you’re trying to pick out the right HDTV for your needs, the available products break down into three major product groups, distinguished from each other by their display technology and cabinet type.

By comparing display technology and cabinet type to your needs, you can easily rule out a whole bunch of different TVs, and home in on the likely best ones for you. HDTVs come in all sorts of different sizes and shapes. Some are flat-panels that you can hang on the wall; others are projection systems much like what you’d find in a movie theater. And, of course, there are HDTVs based on tubes that look just the way TVs have for decades (only with a better picture).

Each form of HDTV has some advantages and disadvantages.Here we want to give you just a quick overview to help you on your way. Skip ahead if you need the details and supporting information.

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