Subject :- Television Engineering

Topic :- Displays

Difficulty :- Low

• Plasma television technology is based loosely on the fluorescent light bulb. The display itself consists of cells.
• Within each cell two glass panels are separated by a narrow gap, in that includes an insulating layer, address electrode and display electrode, in which neon-xenon gas is injected and sealed in plasma form during the manufacturing process.
• When a Plasma TV is in use, the gas is electrically charged at specific intervals.
• The charged gas then strikes red, green and blue phosphors, thus creating an image on the Plasma TV screen.
• Each group of red, green, and blue phosphors is called a pixel (picture element - the individual red, green, and blue phosphors are referred to as sub-pixels).
• Due to the way that Plasma technology works, it can be made very thin.
• However, even though need for the bulky picture tube and electron beam scanning of those older CRT TV is no longer required, Plasma TVs still employ the burning of phosphors to generate an image.
• Thus, Plasma TVs still suffer from some of the drawbacks of traditional CRT TVs such as heat generation and possible screen-burn of static images.