Question

Plasma Display

Answer 1

Plasma Display

A plasma display is a computer video display in which each pixel on the screen is illuminated by a tiny bit of plasma or charged gas, somewhat like a tiny neon light. Plasma displays are thinner than cathode ray tube ( CRT ) displays and brighter than liquid crystal displays ( LCD ). Plasma displays are sometimes marketed as "thin-panel" displays and can be used to display either analog video signals or display modes digital computer input.

Plasma-Panels are also called as Gas-Discharge Display. It consists of an array of small lights. Lights are fluorescent in nature. The essential components of the plasma-panel display are:

1. Cathode: It consists of fine wires. It delivers negative voltage to gas cells. The voltage is released along with the negative axis.
2. Anode: It also consists of line wires. It delivers positive voltage. The voltage is supplied along positive axis.
3. Fluorescent cells: It consists of small pockets of gas liquids when the voltage is applied to this liquid (neon gas) it emits light.
4. Glass Plates: These plates act as capacitors. The voltage will be applied, the cell will glow continuously.

The gas will slow when there is a significant voltage difference between horizontal and vertical wires. The voltage level is kept between 90 volts to 120 volts. Plasma level does not require refreshing. Erasing is done by reducing the voltage to 90 volts.

Each cell of plasma has two states, so cell is said to be stable. Displayable point in plasma panel is made by the crossing of the horizontal and vertical grid. The resolution of the plasma panel can be up to 512 * 512 pixels.

Advantages

1. Wall Mounted
2. Slim
3. Wider angle
4. High Resolution
5. Large screen size is also possible.
6. Less Volume
7. Less weight
8. Flicker Free Display

Disadvantages

1. Phosphorus loses luminosity over time.
2. It consumes more electricity than LCD.
3. Large Size
4. Poor Resolution
5. Wiring requirement anode and the cathode is complex.
6. Its addressing is also complex.

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