Electrophoretic display and a method of shaking an electrophoretic display from an extreme position
US7872633B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2003 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Nov 23, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electrophoretic display having charged particles that are able to occupy, between a first and second electrode, two limit positions and intermediate positions between the two limit positions which are defined by a drive voltage. An addressing circuit generates the drive voltage waveform by successively applying between the first electrode and the second electrode, during an image update period, a reset pulse enabling particles of the display to substantially occupy one of the limit positions, and a drive pulse having a level in accordance with an optical state to be reached by one of the pixels. The addressing circuit generates a first shaking pulse having at least one preset pulse having energy sufficient to release particles present in one of the limit positions, but insufficient to enable the particles to reach the other one of the extreme limit positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.