Plasma
A Plasma display panel (PDP) is an image display device technology using hundreds-of-thousands of miniature, embedded cells.
Each one of these corresponds to one pixel, (picture element) and has three sub-cells. The three sub-cells are filled with a plasma gas which will 'glow' red, blue or green (depending on the phosphor coating) when charged electrically.
Light from the three "RGB" sub-cells combines to form a one coloured pixel on the screen. Some early plasma devices were susceptible to "burn-in", an unwanted retention of an image that may be permanently scarred onto the screen