Electronic timepiece with negative resistance light emitting elements
US4149368A · kind A · utility
2Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1976 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Mar 17, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G9/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A time calculation ring counter is made of a plurality of negative resistance light emitting elements, which provide display of current time information. In a preferred form, a plurality of GCR's (gallium arsenide gate controlled rectifiers) or a plurality of GND's (gallium arsenide negative resistance light emitting diodes) are aligned in a circular fashion on a display panel of an electronic timepiece. The GCR's or GND's function to either calculate the time information or indicate the time information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.