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1. (WO2001003104) DRIVING OF DATA LINES IN ACTIVE MATRIX LIQUID CRYSTAL DISPLAY

Pub. No.:    WO/2001/003104    International Application No.:    PCT/EP2000/006039
Publication Date: Fri Jan 12 00:59:59 CET 2001 International Filing Date: Thu Jun 29 01:59:59 CEST 2000
IPC: G09G 3/20
G09G 3/36
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V.
Inventors: EDWARDS, Martin, J.
KNAPP, Alan, G.
Title: DRIVING OF DATA LINES IN ACTIVE MATRIX LIQUID CRYSTAL DISPLAY
Abstract:
An active matrix LC display device comprises an array of display elements (10) driven via sets of row and column address conductors (14, 16) connected respectively to a row drive circuit (30) operable to select each row in turn and a column drive circuit (35) for providing respective data signals for the display elements of a selected row and which comprises a multiplexing circuit arranged to address groups of column address conductors (16) in succession during a row address period. To avoid, or reduce, unwanted display artifacts arising from the use of a multiplexing circuit, the column drive circuit (35) is arranged to charge at least the last column address conductor in a group in at least two separate charging periods with the second charging period occurring after a charging period of the next group in the sequence.