Active matrix liquid crystal display devices
US6700562B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1999 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Dec 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0209
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An active matrix liquid crystal display device comprising display elements (10) addressed via sets of row and column address conductors (14, 16) connected respectively to row and column drive circuits (30, 35) and with the column drive circuit (35) being operable to transfer data signals for the display elements of a row to groups of column address conductors (16) 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 (36) for that adjacent column conductor, a supplementary switch (Tx) connected to a video input line (V1, V2, V3), and which operates simultaneously with the multiplexer switches of the
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.