Looks can be highly deceptive; you must have heard this adage often. And it holds so true in this case as well. Both, LCD and Plasma are flatter and thinner versions of your age old television. The outward appearance might be similar but the technology used in both is quite different.
First things first, plasma television does away with the bulky picture tube and electron beam scanning of traditional televisions. The technology it uses instead is based loosely on the fluorescent light bulb. Cells form the entire display and within each cell two glass panels are separated by a narrow gap in which is filled with neon-xenon gas and sealed in plasma form during the manufacturing process itself. The gas gets charged automatically at specific intervals, whenever the plasma is switched on. The charged gas then strikes red, green, and blue phosphors, which we call s pixels, and thus a television image is created. Screen-burn of static images and generation of heat after excessive use are certain drawbacks that plasma has not been able to improve upon.
Two layers of transparent material that are glued together form the LCD panels. Technologically, it differs from the plasma in many ways. Out of the two, one layer is coated with a special polymer that holds the individual liquid crystals. Current is then passed through these crystals allowing them to pass or block light. An image is thus created through a different technology in LCD screens. An external light source is needed in case such as this as the LCD crystals do not produce their own light. A fluorescent bulb is hence needed to view the image created by the LCD.
Since no phosphors get burned up in case of LCD screens, the heat generated is much less. Also, there is no direct emission of light from the screen itself. Keeping the budget and requirements in mind, one can now easily decide which one to go for-LCD or Plasma…what do ya say?!
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Andrena Markley is the webmaster of http://gazette-world.blogspot.com. Get updates on Cool Gadgets and latest gizmos from the site.
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