Booster circuit for electronic watch elements
US4529322A · kind A · utility
15Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 9, 1982 |
| Grant date | Jul 16, 1985 |
| Priority date | — |
| Expiry date | Jun 9, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A booster circuit in an electronic watch having: hands for indicating time or a display portion such as a panel for displaying time digitally; a lamp for lighting the display portion by electroluminescence (EL element); and a sound generating portion for generating sound at an alarm setting time by vibration of a piezo-electric element. The booster circuit has a boosting member for driving the EL element and a boosting member for driving the piezo-electric element. These boosting members commonly use one coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.