Omni voltage direct current power supply
US7569996B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 19, 2004 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Mar 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery operated LED lighting apparatus including: a battery outputting a battery voltage; a light emitting diode or array of light emitting diodes; and a power supply including a boost regulating circuit. The power supply being in communication with the battery and the light emitting diodes such that a constant voltage or constant current is supplied to the light emitting diodes as the battery discharges and the battery voltage falls below the output voltage. In a preferred embodiment the power supply further includes a buck regulator to maintain the proper output voltage when the battery voltage is greater than the output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.