Drive method for an electrophoretic cell and an electrophoretic device
US9633610B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2007 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | May 19, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0261
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a drive method for an electrophoretic cell and a device adapted to implement the method. The cell comprises a first storage electrode (24), a second storage electrode (22), a first target area electrode (28), a second target area electrode (30), a first type of particle (32) and a second type of particles (33), said second type of particles being of opposite polarity to the first type of particles. An area (31) extending between the target area electrodes (28, 30) is a target area. The method comprises a reset phase (110), wherein said first and second type of particle are reset to determined reset positions, a first write phase (120), wherein the first type of particles are moved to and/or from the storage electrodes and change in amount in said target area (31), a second write phase (140) similar to the first write phase but for the second type of particles, and a spread phase (150) so that the particles in said target area (31) distribute and mix. The method allows for short distance movements and two particle type in the same cell can be written comparatively fast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.