What are the Differences between a Plasma TV and a LCD TV

May 26th, 2008

Have a satellite system and now want a flat panel TV?

So you have gone out and purchased a Dish Network or Direct TV satellite system. When you got home, you realized that although you have a high definition receiver, your TV isn’t compatible. You have eyed those flat panel TVs in the store but don’t know which one to buy?

Two of the greatest changes to the world of televisions are the plasma TV and the LCD TV. Both offer slim and sleek designs and enable unique placement, such as above a fireplace or mounting on a wall. Gone are the days of the bulky CRT (cathode ray tube) televisions or rear projection; long live the flat panel!

So how does a plasma television work?

First introduced in 1964, improvements in processing and manufacturing have made the plasma television one of the best. Differing from other television technology, such as LCD and CRT, the image is created by combining all three colors within each pixel. The signal is sent by a charge through the electrodes sandwiched between two glass panels. This changes the state of the plasma gas inside and makes the red, green and blue phosphors glow, creating light on the picture screen.

You can buy plasma televisions in either Extended Definition (ED) or High Definition (HD) resolutions. ED panels can input full HD content 1080i (interlaced) but output 500p (progressive) resolution. If you are planning to use the plasma with primarily high definition and/or with a computer, consider the HD model. If you are using it mostly with DVD, regular satellite, or cable, you will find the ED model looks great. A good ED model will outperform a poor HD plasma television, so choose a good manufacturer.

So how does a LCD television work?

The LCD television creates a picture by using a system called Twisted Nematic (TM). It is a naturally twisted crystalline structure that reacts to electric currents in predictable manners. These electric currents cause the crystal to untwist to different degrees based on the voltage given. These TM crystals are stuck between panes of polarized glass and the untwisting allows varied amounts of light to pass through.

If you are looking for a flat panel television, here are the guidelines. Below 32 inches, buy a LCD, above buy a plasma. LCD panels are available in larger sizes but the cost and quality of image will make a plasma more attractive.

Plasma televisions are better able to display fast movement without any trailing. As wel, plasma televisions have a much greater contrast ratio than LCD televisions. Panasonic lists their plasma televisions at 3000:1, while the best LCD tends to be only 1000:1 contrast ratio. The plasma television has a greater angle of view and better color saturation too.

One area where the LCD television has an advantage over plasma is in screen integrity. You need to be careful with potential burn-in on plasma, but not on the LCD TV.

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How to Buy a LCD TV with HDTV

April 9th, 2008

If this doesn’t get you excited, then nothing will. LCD TVs have become all the rage and there is nothing better than a big screen TV. And when you couple LCD TV with HD TV, look out. An amazing physical display combined with a fantastic output. This is what is happening in LCD TV technology today.

If you are like most people looking to replace your TV, you’ve probably been paying close attention to High Definition Television sets (HD-TV). Unlike the previous generation of TV, which used analog signals to transmit information, HD-TVs use digital signals to transmit a signal and receive and display information directly on the television set. The HD-TVs also use a High-Resolution digital television set and Dolby Digital surround sound. The combination of the two creates incredible pictures and sounds - the best available on the market to date. HD-TV television offers viewers a level of detail they haven’t seen before: including a resolution about five times higher than that of analog TV.

The main thing to remember when you are shopping for HD-TV set is that just because a television is “digital” it does not mean it is necessarily “HD-TV compatible”. There are two levels below the HD level (standard definition TV and enhanced definition TV), both of which are vastly better than analog televisions but still of considerably lower quality than an LCD TV- HD-TV set. Since the FCC has mandated that all television sets eventually switch from analog to digital, you should know the differences between the different types of digital TVs.

Here are some tips. When looking to purchase an HD-TV, remember to compare the difference in picture resolution, audio features, and pixels. HD-TV requires a minimum of 720 horizontal scanning lines (enhanced definition TV, while considerably higher than standard definition TV, only features a minimum of 480 scanning lines) and the resolution on an HD-TV is 1920 x 1080 compared to enhanced definition TV, which only has a resolution of 1280 x 780.

When you experience a HD-TV image and then compare it to other TVs’ technology on the market, the difference will be clear. With “HD” everything looks and sounds far more realistic than on any other type of system. We think that once you see a big screen LCD TV with HD-TV, the choice will be clear.

This is just the tip of the iceberg when looking for a HD LCD TV. In fact, many of the most important tips haven’t been mentioned here. Learn about LCD TVs before making a purchase.

Lind Harrison is author of “Buy A LCD TV.” Read your copy at http://www.welcdtv.com.

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