Bistable liquid crystal display device including improved addressing means
US7352346B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2003 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Oct 18, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/066
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of electrically addressing a matrix screen of bistable nematic liquid crystals with breaking of anchoring is disclosed. Controlled electrical signals are applied respectively to row electrodes and to column electrodes of the screen. A plurality of rows are simultaneously addressed using similar row signals that are offset in time by a duration greater than or equal to the time column voltages that are applied. The row addressing signals have, in a first period, at least one voltage value serving to break the anchoring of all of the pixels in the row. This is followed by a second period that enables the final states of the pixels making up the address row to be determined. The final states are a function of the value of each of the electrical signals applied to the corresponding columns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.