Timepiece
US7639571B2 · kind B2 · utility
47Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2007 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Dec 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/16755
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A timepiece has a display panel having electrophoretic particles between two opposing substrates, and a drive circuit unit having a display drive unit for applying an electric field between the substrates and a timekeeping unit for keeping time information. A plurality of first electrodes are rendered in the shapes of a plurality of symbols used to display time information content on one of the substrates, and a second electrode is disposed on the other substrate for applying a voltage between the first electrodes and the second electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.