Power circuit and illumination apparatus
US8004204B2 · kind B2 · utility
1Cited by
0References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 15, 2009 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Feb 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/385
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A series load circuit is a circuit formed by connecting a light-emitting device unit 851 (the first load circuit) and a light-emitting device unit 852 (the second load circuit) in series. A voltage generating circuit 111 generates voltage to be applied to the series load circuit. A current detecting circuit 112 detects electric current flowing through the light-emitting device unit 851. A controlling circuit 114 controls the voltage generating circuit 111 so that the electric current detected by the current detecting circuit 112 becomes a predetermined current value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.