When you go out to shop for your first high-def TV, you may be confused by the many, many different specifications you'll find on each. While a complete description of the different specs would take a book, you can learn more than just the difference between plasma and LCD in just the next couple of minutes.
Start with that difference. The three basic types of high-def TVs available today are the LCD TV, the plasma TV, and the DLP TV, a modern version of the old projection television. LCDs and DLPs are back-lit, making it harder to display clear black colors; plasma TVs are lit in a somewhat different manner, so they have very realistic blacks, but they tend to be a little more expensive and a lot more delicate. A DLP TV usually looks good, and the back lighting is simple to switch out for anyone, giving it perhaps the longest lifespan of any other high-def TV out there, and if you have a projector rather than an enclosed system, you can scale the picture to fit your space - a nice advantage. But DLP TVs are also likely to have the worst picture of the three.
Next, size. All high def TVs have a wide aspect ratio, so instead of the nearly-square traditional television screen shape, they have a movie-theatre shaped screen, often called 16:9 aspect ratio. This doesn't vary, so don't worry about that. (Regular TVs, for comparison, have a 4:3 aspect ratio, though this is hardly ever cited.) Screens are measured on the diagonal, so a high def TV may seem smaller than a traditional TV with the same listed screen size - and it is unlikely to fit smoothly into the same space. Keep this in mind.
Resolution is more complicated. Traditional TV has 480i resolution. This means that the picture on the screen is shown in 480 lines; the "i" stands for "interlaced", meaning that odd lines are shown first, then even lines, with about a sixtieth of a second of display before switching. Our vision tricks us into thinking this is a smooth screen. Rarer 480p TVs have all the lines shown at once, and you'll notice a distinctly better picture.
On high-def televisions, on the other hand, sets start at 720p; most are right around 1080p. Watch this; you want to make sure every video peripheral, like blu-ray readers and cable boxes, are compatible with this resolution. A mismatch here is the number-one reason your high-def TV may not look as good as it should. Also, more is not better; while you can get better than 1080p, if your peripherals don't match (and most won't), you won't get a good picture.
All standard high-def TVs will have specs falling in the following ranges. Try to keep your TV and your peripherals matched as closely as possible, and you'll have the best viewing experience.
* 1080 lines with 1920 vertical pixels; 16:9 aspect ratio; and either 60i, 30p, or 24p display (referencing time between refreshes)
* 720 lines with 1280 vertical pixels; 16:9 aspect ratio; and either 60i, 30p, or 24p display
* 480 lines with 704 vertical pixels; 16:9 or 4:3 aspect ratio; and either 60p, 60i, 30p, or 24p display
When choosing a high-def TV, more lines is generally better, 16:9 is better, and a high number plus p makes for the best display. And while HDTV is backward compatible with traditional broadcast, it's smart to invest in HD channels; the picture is much, much better with a high-def TV.
SNS Designs, Inc. owns a number of websites. They carry wide selection of Widescreen LCD TV, Samgung LCD TV, LCD Flat panel TV. They offer the most popular in home theatre and a number of televisions that range from Sony, Pioneer to LG that everyone can afford.
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