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When we are going to buy for an HDTV, there are plenty of factors to consider. Chief among them is the type of display. While boxy, bulky CRTs are long dead and large rear-projection HDTVs are all but extinct.The HDTV market currently offers three distinct choices in display technologies: Plasma, traditional CCFL(cold cathode fluorescent)-backlit LCD, and LED-backlit LCD.

“Television” may also refer specifically to a television set, television programming or television transmission. Commercially available since the late 1930s, the television set has become a common  communications receiver in homes, businesses and institutions, particularly as a source of entertainment, tutorials and news. Since the 1970s the availability of video cassettes, laserdiscs, DVDs and now Blue-ray Discs, have resulted in the television set frequently being used for viewing recorded as well as broadcast material.

Day by day, new technology comes in to the market.The flat screen TV technologies have taken over the consumer market against the old bulky CRT TV technology displays. Again, researches have shown that Plasma based televisions, are better in their display features than, the liquid crystal display (LCD) based televisions. Television (TV) is a widely used telecommunication medium for transmitting and receiving movingimages, either monochromatic (“black and white”) or color, usually accompanied by sound.

A standard television set comprises multiple internal electronic circuits, including those for receiving and decoding broadcast signals. A television system may use different technical standards such as digital television (DTV) and high- definition television (HDTV). The different television technologies behind the CRT(cathode ray tube) and the flat screen (LCD and Plasma) TVs continued to form a subject of comparison that consumers seem not to ignore especially when making a purchase.










The three technologies are vastly different, particularly with respect to how each screen is lit. In Plasma HDTVs, the phosphors that create the image on the screen light up themselves, and do not require backlighting. For LCD HDTVs, however, the liquid crystal screen does not illuminate, requiring a separate light source. That is where the difference between “regular” LCD screens (also known as CCFL-backlit LCD) and LED-backlit LCD screens come in. Traditional LCD HDTVs use cold cathode fluorescent lights (CCFLs) to illuminate the screen. CCFLs are similar to the fluorescent lights you might see in some lamps and overhead light fixtures. They use a charged gas to produce light. LED screens, like their name implies, use light emitting diodes (LEDs) to illuminate the display. LED backlighting has become much more common in the last few years, and CCFLs are now generally only seen on budget HDTVs.





Several factors can be influenced by the type of HDTV display you choose. Among them, the most prominent are screen thickness, brightness, darkness, energy efficiency, and price. LED HDTVs command a premium; for all major HDTV manufacturers, LED-backlit HDTVs typically cost more than CCFL-backlit HDTVs of the same size. However, LED HDTVs have become standard for both midrange and high-end models, as CCFL screens have been relegated to the budget category. Generally, plasmas tend to be less expensive than LEDs but slightly more than CCFL-backlit HDTVs.




When we talk about their image quality,A very wide gamut from dark to light lets the HDTV show the tiniest details, regardless of how bright or dark the movie gets. In our tests, we measure white and black levels by luminance using a Chroma Meter. A mediocre HDTV might produce black levels of 0.05 to 0.07 cd/m2, while an excellent HDTV will offer levels of 0.01 to 0.03 cd/m2.

A super-thin HDTV is not only visually striking, but it is more easily mounted on a wall, and can be more readily arranged, displayed, or concealed as part of your home theater. On this point, LED screens win hands-down, with plasma close behind. The CCFLs that backlight low-end LCD screens are much thicker than LEDs.LED TVs are highly efficient power consumers. In fact, depending on the series and screen size, Samsung’s LED TVs in standard mode can be up to 50 percent more efficient than the latest ENERGY STAR specifications.These TVs are lightweight, easy to wall-mount and move from one room to another. They work equally well in dark or brightly lit rooms, and come in a range of sizes. Some models are 3D capable and can even convert 2D movies to 3D with the touch of a button.




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