Low loss input channel detection device for a direct current powered lighting system
US7906913B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 2008 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Nov 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device used with a direct current power source for energizing a lamp. The device includes a plurality of input channels selectively connected to the power source for providing current to the lamp. For each input channel, the device includes a corresponding current sensing component connected to the input channel, and a corresponding bypass switch connected in parallel with the current sensing component. Each current sensing component produces a measurable signal as a function of current that is provided by the corresponding input channel. The device includes a controller connected to the current sensing components and the bypass switches. The controller identifies the input channel that is providing current to the lamp as a function of the measurable signals and controls the bypass switches based on the identified input channel. Particularly, the controller operates each bypass switch in a closed mode when the corresponding input channel is the identified channel so that current provided by the corresponding identified input channel bypasses the current sensing component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.