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Combining passive‐ and active‐matrix addressing of LCDs
Author(s) -
Kuijk K. E.
Publication year - 1996
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1984983
Subject(s) - row , row and column spaces , active matrix , matrix (chemical analysis) , liquid crystal display , multiplexing , computer science , orthonormal basis , materials science , physics , telecommunications , nanotechnology , layer (electronics) , quantum mechanics , database , composite material , operating system , thin film transistor
— A combination of passive‐ and active‐matrix addressing is proposed by dividing the ITO columns of a passive‐matrix LCD in parts, thus only covering a group of rows. The ITO parts are connected to metal columns via TFTs. This leads to a significantly smaller number of TFTs, as compared to an active‐matrix LCD. The proposed system may either be driven as a switched passive matrix (SPM) with a low multiplexing factor, or as a multiplexed active matrix (MAM) by holding the voltages. The number of row connections may be decreased by connecting the corresponding ITO rows of a number of groups. Both row‐at‐a‐time addressing and multiple‐row selection with orthonormal waveforms may be used for both driving methods.