Plasma display pannel

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PLASMA DISPLAY PANELS (PDP)

DISPLAY TYPES

What is Plasma?Plasma is often called the "Fourth State of Matter", the other three being solid, liquid and gas. A plasma is a distinct state of matter containing a significant number of electrically charged particles, a number sufficient to affect its electrical properties and behavior. In addition to being important in many aspects of our daily lives, plasmas are estimated to constitute more than 99 percent of the visible universe.

Plasma display panels:

PLASMA display panels (PDPs) are one of the leading candidates in the competition for : large-size, high-brightness ,flat panel displayssuitable for high-definition television (HDTV) monitors

Their advantages are:Fast responseWide viewing angleLow weightSimple manufacturing processHigh resolution

WORKING PRINCIPLE OF PLASMA DISPLAY PANELS: Typical plasma displays

consist of two glass plates, each with parallel electrodes deposited on their surfaces. The electrodes are covered with a dielectric film. The plates are sealed together with their electrodes at right angles, and the gap between the plates is filled with an inert gas mixture. A protective MgO layer is deposited above the dielectric film. The role of this layer is to decrease the breakdown voltage caused by the high secondary electron emission coefficient of MgO.

The discharge is initiatedby applying a voltage pulse to the electrodes. Xenon gas mixtures are used to efficiently generate UV photons. The UV photonsemitted by the discharge hit the phosphors deposited onthe walls of the PDP cell and are converted into visible photons. Each cell contains phosphor that emits one primary color—red,green, or blue.

Applications of plasma display panels:

Various applications of Plasmas:Processing:• Surface Processing• Non equilibrium (low pressure)• Thermal (high pressure) Volume Processing:• Flue gas treatment• Metal recovery• Waste treatment Chemical Synthesis:• Plasma spraying• Diamond film deposition• Ceramic powders 

Light Sources:• High intensity discharge lamps• Low pressure lamps• Specialty sources Surface Treatment:• Ion implantation• Hardening• Welding • Cutting• Drilling Propulsion

  Various applications of Plasmas:

Flat-Panel Displays:• Field-emitter arrays• Plasma displays Radiation Processing:• Water purification• Plant growth Switches:• Electric power • Pulsed power Energy Converters:• MHD converters• Thermionic energy converters

Medicine:• Surface treatment• Instrument sterilization Isotope Separation Beam Sources Lasers Material Analysis

Differences between plasma display panels

and LCD

1. Screen Size and Price2. Color Accuracy and Saturation3. Picture Resolution

4. Contrast Ratio5. Burn-In6. Pixel Response Time and Screen Refresh Rate7. Power Consumption

8. Viewing Angle

9. Weight 10. Performance at High Altitude

CR= Luminance of brightest white/Luminance of darkest black

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DEBOLEENA DUTTANUPUR MALLIK