Electrophoretic displays in portable devices and systems for addressing such displays
US6753999B2 · kind B2 · utility
375Cited by
83References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Nov 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K85/60
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A card may include a photoconductive layer and an electrophoretic layer. The impedance of the photoconductive layer is lowered when struck by light from the light-emitting layer. Where the impedance of the photoconductive layer is lowered, the electrophoretic layer may be addressed by an applied electric field to update an image on the card. The image on a card may be updated by a system of updating an image on a card and a method of updating an image on a card that are presented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.