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A look at the pros and cons of LCD versus Plasma


Flat televisions are currently created using two different technologies. Liquid Crystal Display, commonly known as LCD, is one type, and plasma is the other. All LCD displays are created with the same technological background, liquid containing crystals are suspended between two transparent panels. When the crystals within the liquid are activated by voltage they re-position themselves to either allow the light to pass through the panel or to block the light. This process is like turning on and off a million light bulbs. The light source supply comes from fluorescent tubes behind the panels. The lit and unlit crystals create pixels that are visible, which make up the image on the screen. Plasma TV is created using over a million tiny glass cells, these glass cells are charged with a mixture of neon and xenon. There are colored phosphors behind these cells, which are chemical compounds that when energized they emit light. Each cell contains three phosphors; a red, a green, and a blue. The plasma cells emit invisible UV light, when they are activated by an electrode. The UV light hit's the red, green, and blue phosphors on the back of the display creating the pixels that form the image on the screen.


Picture:
1. Contrast/Black Levels;
Despite recent improvements in LCD technology, only the best LCD televisions, like those produced by Sharp and Sony, have been able to offer1000:1 contrast ratio barrier. These recent improvements have made it possible for LCD displays to improve and advance up to almost the same level as plasma displays, except the LCD has one continual drawback. This is that the LCD display is off axis viewing when black levels drop consistently. Plasma technology has an impressive contrast ratio. Using internal algorithms to block the power to particular pixels is how plasma displays achieve suchimpressive black levels. DVDs, video games, and NTSC TV signals have scenes with a lot of dark and light images shown simultaneously in which, the plasma display outperforms the LCD display.
2. Color;
LCD televisions manipulate light waves and subtract colors from white light to reproduce colors. Plasma displays, use pixels each containing a red, or a green or a blue element to create 16.77 million colors. Despite the latest technology advances in LCD displays, Plasma continues to achieve more richness in color information and more natural coloration than LCD. However, LCD's typically produce a brighter picture. The bottom line is plasma has better richness of color and naturalness in rooms with lower to normal lighting and LCDsare better in very brightly lit rooms.

Functions:
1. Computer screens;
LCD displays typically have a higher number of pixels per square inch than other technology displays, making LCD monitors great for displaying large amounts of data with exceptional clarity. Plasma technology has increased anti burn in tactics, along with computer and static signal handling issues. When viewing static images, plasma displays do not handle computer input well and produce a very jaggy image.

2. Altitude:
At high altitudes, 6,500 feet and above, plasma displays emit a buzzing sound due to the lower air pressure. This noise sounds like the humming of an old neon sign. But LCD displays are not affected by increases or decreases in air pressure. Regardless of the altitude, LCD displays performance is consistent.

On the market today, plasma TV's are as big as 60 inches, and there are no plasma TV's available smaller than 32 inches. LCD screen sizes currently available range from 13 inches to 46 inches, but larger models are becoming more available every year due to LCD manufacturing innovations.

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