What is the difference between a plasma TV and an LCD TV?
Plasma Now, LCDs Later At the moment, vendors of large LCDs simply can’t compete on price. It’s also because plasma screens don’t have the response-time issues that make LCDs less than optimal for moving images such as video or games. The principal drawback of previous-generation plasma screens–the tendency of stationary images to burn in and produce permanent ghosting–has diminished greatly in newer products. NEC, for example, has developed technology to deal with the problem by moving stationary pixels just enough to prevent such burn-in, Giazzon says. But LCDs have some advantages over plasma, Giazzon adds. If you’re contemplating a home entertainment setup involving a PC–perhaps running Windows XP Media Center Edition–or other activities involving text as well as graphics, you’ll get a crisper, brighter image from an LCD. LCD TVs weigh 10 to 15 percent less than plasmas of comparable size. They often look better in daylight than plasmas, though Steudle concedes that plasmas hav
Both television technologies use discrete picture elements to form an image. The cells in a plasma television contain an inert gas that is trapped between two glass plates. At the rear is an electromagnetic exciter, which heats the gas until it ionizes and emits UV radiation. A phosphor coating on the front plate glows with the appropriate colour. Liquid crystals are diodes that darken when an electrical voltage is applied. Picture elements are placed behind a coloured filter and a control voltage is used to change their level of darkness, from transparent to fully opaque. Light is provided by a bulb mounted behind a diffuser. Both technologoes can experience cell failures. Cells burn out in plasma displays or become ‘stuck’ in LCD displays. Both respond fairly slowly to rapid changes in image content. Both have poorer contrast ratios than CRTs. Plasma displays may be more fragile than LCDs and they consume more power. LCD displays tend to have larger picture cells, which may make the
Outward appearances are definitely deceiving when it comes to LCD and Plasma televisions. Although both types of televisions are flat and thin, they employ different technology in an attempt to deliver similar results. Plasma TV Overview Plasma television technology is based loosely on the fluorescent light bulb. The display itself consists of cells. Within each cell two glass panels are separated by a narrow gap in which neon-xenon gas is injected and sealed in plasma form during the manufacturing process. The gas is electrically charged at specific intervals when the Plasma set is in use. The charged gas then strikes red, green, and blue phosphors, thus creating a television image. Each group of red, green, and blue phosphors is called a pixel (picture element). Although Plasma television technology eliminate the need for the bulky picture tube and electron beam scanning of traditional televisions, because it still employs the burning of phosphors to generate an image, Plasma televis
LCD TVs and Plasma TVs both belong to the same broad category viz. Flat Panel TVs. In the early stages of Flat Panel Technology, LCD TVs though better in overall quality & features suffered a limitation in terms of size. In other words, an LCD TV more than 32″ was a bit of a challenge. At that time, a consumer looking for a large screen of 40″ or more had no option but to settle for a Plasma TV. This challenge has long since been overcome and LCD TVs with excellent quality are now available in sizes of 70″ and more. LCD Technology offers several advantages over Plasma Technology More Brightness: LCD TVs typically have a brightness of 500cd/sq.m as compared to 100cd/sq.m for Plasma. More the brightness, greater the picture clarity. No Reflection: Plasma TVs employ phosphors for imaging which are susceptible to glare from indoor and outdoor light. LCD TVs don’t have this problem. Greater Life Span: The Life Span of an LCD TV is at least twice that of a Plasma TV under similar viewing con
