The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2004
Filed:
Dec. 16, 1999
Alan G. Knapp, Crawley, GB;
Martin J. Edwards, Crawley, GB;
Koninklijke Philips Electronics N.V, Eindhoven, NL;
Abstract
An active matrix liquid crystal display device comprising display elements ( ) addressed via sets of row and column address conductors ( ) connected respectively to row and column drive circuits ( ) and with the column drive circuit ( ) being operable to transfer data signals for the display elements of a row to groups of column address conductors ( ) in sequence in respective group address periods in a multiplexing manner. The occurrence of undesirable display artifacts is alleviated by applying, during the group address period for one group, a pre-charging signal to the adjacent column address conductor of the next-addressed group according to the level (magnitude) of a data signal for a column conductor in that one group. This can be achieved conveniently by providing, in addition to a multiplexing switch ( ) for that adjacent column conductor, a supplementary switch (Tx) connected to a video input line (V , V , V ), and which operates simultaneously with the multiplexer switches of the