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There are three different '''addressing schemes''' for [[display]]-devices; 1) electronically or 2) optically addressed displays, or 3) addressing by plasma columns. Each teqnique allows a physical way of switching the [[pixel]] to a black-white or more usually gray-scale state.
Colour displays or the [[pixel geometry]] are actually implemented using three [[gray-scale]] components making up one [[pixel]] and component corresponding to a [[primary colour]] [[red]], [[green]] or [[blue]]. So the treatment simplifies since it is sufficient to consider only a pixel with ''N'' gray shades. The shade level is typically lineary dependent on the applied potential over the pixel, so each level will translate into a gap of say ''δV/N'' [[volt]]s per gray shade. Since there is risk for a [[crosstalk|cross-talk]], the addressing scheme must carefully be designed so that addressing a pixel does not affect other neighbours.
== Electronically addressing ==
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