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Passive matrix addressing is an addressing scheme used in early LCD displays. This is a matrix addressing scheme meaning that only ''m'' + ''n'' control signals are required to address a ''m'' × ''n'' display. A pixel in a passive matrix must maintain its state without active driving circuitry until it can be refreshed again. The signal is divided into a row or ''select signal'' and a column or ''video signal''. The select voltage determines the row that is being addressed and all ''n'' pixels on a row are addressed simultaneously. When pixels on a row are being addressed, a ''Vsel'' potential is applied, and all other rows are unselected with a ''Vunsel'' potential. The video signal or column potential is then applied with a potential for each ''m'' columns individually. An on-lighted pixel corresponds to a ''Von'', an off-switched corresponds to a ''Voff'' potential. The potential across pixel at selected row ''i'' and column ''j'' is : and : for the unselected rows. Passive matrix addressed displays such as Ferro Liquid Display do not need the switch component of an active matrix display because they have built-in bistability. Technology for electronic paper also has a form of bistability. Displays with bistable pixel elements are addressed with a passive matrix addressing scheme, whereas TFT LCD displays are addressed using active addressing. ==See also== * Active matrix addressing * Pixel geometry * Liquid crystal display 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Passive matrix addressing」の詳細全文を読む スポンサード リンク
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