A '''matrix addressed''' display runs control signals only to the rows and columns of the display. (See also: [[Matrix (mathematics)|matrix]]) For a screen size of ''m''×''n'' pixels, this scheme would require ''m''+''n'' control signals. WhenIn a[[active row andmatrix column are activatedaddressing]], onlysome thesort pixelof atcapacitor the(extranl intersection ofto the rowcell and columnproper) is addressed.used to In this scheme only a single pixel can have its state set or maintained at any one time, which means thatmaintain the state of the pixelcell. must[[Passive persistmatrix withoutaddressing]] ais controlused signalwhen duringcell theitself timehas whicha otherbistability, pixelsso areno beingexternal addressed.capacitor is Thisneeded. persistenceIn cansome besituations accomplished through [[activepassive matrix addressing]],[[passiveis matrix addressing]],used orwith the help of persistence of vision of the (usually human) eye so cell needs not to be bistable. Persistence of vision is used in simpler, slower changing displays such as clocks.
