Display device for electronic timepieces
US4243303A · kind A · utility
0Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1979 |
| Grant date | Jan 6, 1981 |
| Priority date | — |
| Expiry date | Mar 1, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G9/0041
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An illuminating device provided adjacent the liquid crystal display device of an electronic timepiece having a light emitting element composed of tritium (.sup.3 H). The light emitting element is sealed with a resin without hydrogen atoms, such as chlorotrifluoroethylene resin or polytetrafluoroethylene for preventing the leakage of 3H of tritium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.