Wednesday, September 3, 2008

Plasma Vs LCD!

Plasma

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.
It employs the burning of phosphors to generate an image, thereby suffers heat generation and screen-burn of static images.

LCD

LCD panels are made of two layers of transparent material, which are polarized, and are "glued" together. One of the layers is coated with a special polymer that holds the individual liquid crystals. Current is then passed through individual crystals, which allow the crystals to pass or block light to create images. LCD crystals do not produce their own light, so an external light source, such as florescent bulb is needed for the image created by the LCD to become visible to the viewer.

Since there are no phosphors that light up like plasma, less power is need for operation and the light source generates less heat than a Plasma or traditional television. Also, there is no radiation emitted from the screen itself.


Advantages of plasma

1. Larger screen size availability.

2. Better contrast ratio and ability to render deeper blacks.

3. Better color accuracy and saturation.

4. Better motion tracking.

Disadvantages of plasma over LCD

1. More susceptible to burn-in of static images.

2. Generate more heat than LCD s.


3. Does not perform as well at higher altitudes.

4. Shorter display life span (9 years) than LCD.

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