Portable lighting device
US8692473B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 2011 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Jul 5, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A portable electronic lighting device and a method for controlling a portable lighting device are described. The device has a switched-mode power supply, a light source, a high frequency switch, a controller controlling the operation of the light source and a user interface for inputting commands to the controller. A DC power source has a negative pole that is connected by only one single electric contact with the lighting device tail. The method for controlling a portable lighting device includes connecting a DC power source, an inductor, a light source, a high frequency switch and a resistor in series, measuring a voltage across the resistor, and controlling the high frequency switch dependent on the voltage measured across the resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.