A '''matrix addressed''' display runs control signals only to the rows (lines) and columns of the display. (See also: [[Multiplexed_display#Pixel-oriented_displays|Display matrix]]) For a screen size of ''m''×''n'' pixels, this scheme requires ''m''+''n'' control signals. InTo [[activeaddress matrixall addressing]], some sortpixels of capacitorsuch (externala todisplay in the cellshortest proper)time, iseither usedentire torows maintainor theentire statecolumns ofhave theto cellbe addressed sequentially. As many images are shown on a [[Passive16:9 matrixaspect addressingratio]], isthe usedsequential whenaddressing theis celltypically itselfdone hasrow-by-row a(i. bie. line-stabilityby-line). In this case, sofewer norows externalthan capacitorcolumns ishave needed.to Inbe somerefreshed situationsperiodically. passive[[Passive matrix addressing]] is used with the help of persistence of vision of the (usually human) eye so the cell need not be bistable. Persistence of vision is used in simpler, slower changing displays with relatively few picture elements such as clocks. In [[active matrix addressing]], some sort of capacitor (external to the cell proper) is used to maintain the state of the cell. When the electro-optical property of cells itself is bistable, passive matrix addressing
