Method for driving electro-optical display device
US6271819A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1998 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Aug 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A matrix of display elements is driven on a time sharing basis to switch between two optically distinct states in response to a pulse train applied to the selected display elements. The pulse train includes display control pulses having a duration and electric field effective to set the display elements to the desired optically distinct state, and does not allow, after the application of the display control pulse, existence of a pulse which would change the optical state, and also includes a plurality of pulses having the same pulse shapes in different polarities. AC pulses which hold the optical state are applied to the display elements after the application of the display control pulse. The AC pulses are obtained by superposing high frequency AC pulses to the AC pulses having an amplitude lower than the display control pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.