Electronic timepiece
US4764910A · kind A · utility
3Cited by
2References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1986 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Mar 5, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G21/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic timepiece includes a plurality of light-receiving elements arranged to receive external light, a light-receiving condition discriminator for discriminating a light-receiving condition of each light-receiving element, and a circuit to be controlled in response to an output signal from the light-receiving condition discriminator. The light-receiving condition discriminator discriminates that the light-receiving condition of a central one of three light-receiving elements among the plurality of light-receiving elements is different from those of end light-receiving elements, and thereupon generates an output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.