A brief synopsis of plasma
December 13th, 2009 | Author: Brad
We all love plasma TVs, but behind the screen design, how does a plasma screen work?
It’s thanks to Mr. Noble and the gases he discovered that we are now able to watch this type of TV. The physics is quite simple really; xenon, helium and neon are used in many minute cells situated between two plates of glass. Electrodes are positioned between the glass plates and when an electric charge passes across the electrodes a difference in voltage is created ionising the gas and hence creating a plasma. Light photons are emitted due to ion collisions and excite a small amount of phosphor that coats each cell. Each pixel on the screen is made up of 3 sub-cells which are each coloured with a different phosphor (red, green or blue) and the colours merge to give the overall colour of the pixel.
See, told you it was simple.
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