Battery powered light
US6366028B1 · kind B1 · utility
37Cited by
10References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2000 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Jan 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/3574
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light, such as a miniature flashlight, includes a housing adapted to hold a battery, a voltage step-up circuit disposed so as to come into electrical contact with the battery when the battery is placed in the housing and an illumination device, such as a light emitting diode (LED), electrically connected to the voltage step-up circuit. The voltage step-up circuit increases the voltage provided by the battery to drive the LED, to thereby enable the flashlight to use a power source, such as a single standard AA battery, which provides a DC voltage below the turn-on threshold voltage of the LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.