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Active matrix addressing is an addressing scheme applied in displays. Given a n × m matrix, the number of connectors needed is (n + m) ones.

Each pixel is attached to a switch-device to preserve the gray shade and prevent cross-talking. The most important electronically switches are the Thin Film Transistors (TFT), i.e. a FET - transistor component based on either the cheaper non-crystalline thin-film silicon ( a-Si ), polycrystalline silicon ( poly-Si) or CdSe semiconductor material. The latter is doublty used any longer in favour for the two former ones.

Another variant is to use diodes or resistors. But neither diodes (e.g. Metal insulator metall diode s), nor non-linear voltage dependent resistors (i.e. varistors) are currently used. The latter is not yet economically preferred before the TFT.

Display technology

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Topics: Active Matrix Addressing, Active Recall, Active Directory...

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