Personal electronic device having EL lamp and buzzer powered from a single inductor
US6407507B1 · kind B1 · utility
2Cited by
4References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 9, 1996 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Aug 2, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A personal electronic device includes and inverter having a single inductor for powering an EL lamp and a buzzer. The lamp and the buzzer are coupled together to the output of the inverter and are in parallel with each other or are coupled in series between a source of direct current and ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.