Circuit arrangement and method for operating a light source, in particular, a light-emitting diode
US8779677B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 2012 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Oct 3, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for driving a light source, in particular, a light-emitting diode, comprises a first adjustable current path (1), that connects a terminal (BAT_IN) for a battery to a terminal (CAP_IN) for a capacitor, a second current path (2) that connects the terminal (CAP_IN) for a capacitor to a terminal (LED_OUT) for a light source, and a third adjustable current path (3) that connects the terminal (BAT_IN) for a battery to the terminal (LED_OUT) for a light source. A control unit (CTRL) is provided that has a control input (IN) and is set up to adjust current intensities (I_CHRG, I_CAP, I_DIRECT) on the first, second and third control paths (1, 2, 3), respectively, as a function of control signals (I_in) that can be applied to the control input (IN). A method for operating a light source, in particular, a light-emitting diode, is also proposed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.