Step down circuit for an LED flashlight
US6987366B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 31, 2002 |
| Grant date | Jan 17, 2006 |
| Priority date | — |
| Expiry date | Feb 16, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a voltage reducing circuit for use with an LED flashlight. The LED flashlight according to the invention comprises a battery, a solid state light source having an on voltage less than the voltage of the battery, and a voltage reducing circuit in electrical communication with the battery and the solid state light source. The voltage reducing circuit is operative to reduce the voltage from the battery to a level that is slightly above the on-voltage threshold of the solid state light source. In this manner, power expended from the battery by the solid state light source is minimized such that the need for battery replacement is prolonged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.