Plasma TV’s and LCDs (liquid crystal displays) are both kinds of flat screened televisions. Plasmas work by transforming noble gases into plasma, which then discharges light to shape the display on the screen. Each small compartment of gases constitutes one pixel. LCDs, on the other hand, form their displays by placing liquid crystals in front of fluorescent or another type of backlighting.The plasma television is a relatively new type of television, with a flat screen display. It works by having a mixture of different noble gases in small compartments behind a panel of glass. The plasma TV derives its name from the reaction in which these noble gases are turned into plasma, which emits light and forms the display you see. Plasma TV’s are often compared to LCD’s (liquid crystal displays), another type of flat screen television that uses liquid crystals in front of backlighting or fluorescent tubes to produce images.
Plasma TVs are easier to maneuver than traditional CRT televisions (also known as tube televisions). They are flat, with a width of 5 inches, and lightweight, weighing approximately 100 pounds each. In contrast, CRT televisions are much heavier and bulkier. This gives consumers more flexibility when deciding where to place their plasmas; they can be hung on walls or put on stands that support less weight. Manufacturers have even designed plasma televisions that weigh only 45 pounds and are only an inch thick.Plasma televisions (and flat screen TVs in general) are extremely easy to handle. Due to their very nature, plasmas are flatter than traditional televisions (also called CRTs) and thus, are lighter as well. Currently averaging 5 inches in width and 100 pounds, their size will soon be reduced to an inch in width and 45 pounds. This lack of bulk has heralded in a new era of television placement; consumers can now mount their plasmas on the wall without worrying about ruining the wall.
Flat screen televisions cover a range of much higher resolutions than do traditional televisions. High definition plasmas and LCDs have resolutions from 1024×768 pixels per square inch to 1920×1080 pixels. The ceiling of resolution for CRTs stands at a mere 480 lines, providing a much more muddled picture than plasmas or LCDs do.Flat panel TV’s, like plasmas, also have a higher resolution than traditional tube televisions. Resolution is related to how many pixels there are in a square inch; the more pixels, the higher the resolution. At present, high-definition plasmas have resolutions that vary from 1024×768 (720p) to 1920×1080 (1080i), which is much higher than the maximum resolution for tube TVs—480 lines.
Plasmas even last longer than other types of televisions. Manufacturers and companies stress that an average plasma television has a life span of 60,000 hours. That is equivalent to a life span of almost 7 years, if the plasma is left on 24/7. Compared to a tube television’s estimated lifetime of much less than 5 years if left on 24/7, the plasma television is the best choice.
Color reproduction and contrast ratio are two important components of a clear picture. Plasma televisions excel in both; they produce richer, more vibrant colours and truer blacks than LCDs. Due to the backlighting in LCDs, any pixel that should be black will have some light leaking through, which spoils the contrast.
The image of both LCDs and plasmas is comparable when viewed directly in front of the screen. However, plasma televisions have a wider viewing angle than their counterparts. Backlighting causes this problem in LCDs; the image on the screen degrades as the viewing angle increases. Plasmas can be viewed from the sides or top and bottom.
In older models of plasma TVs, the burn-in effect posed a significant problem. When an image (for example, a paused movie) is kept on the screen for too long, the image could be burned into the screen and still faintly visible afterwards. Plasma TV companies have worked to eradicate this problem with much success; while it is still possible for images to burn in, on newer plasmas the possibility is almost negligible.Plasma TVs have been criticized because of the possibility of burn-in images. The burn-in effect happens when a still image is shown on the plasma’s screen for long periods of time (for example, when a DVD is paused and the plasma is left on, burn-in might occur). A ghost of the image may remain on the screen after the image has been changed. However, this effect has almost been negated in the newer models of plasma televisions.
Plasma televisions have almost no size limitations, as long as the consumer’s budget can cover a gigantic screen. LCD and CRT televisions, on the other hand, are constrained to a diagonal measure of about 52 inches.Plasmas also have virtually no size limitations; depending on a consumer’s budget, plasma screens can go up to any size. LCD and CRT televisions, on the other hand, are confined to approximately 52 inches diagonal.
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