Circuit arrangement and method for operating at least one LED and at least one fluorescent lamp
US8264159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2007 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Aug 18, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B47/185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement for operating an LED and an fluorescent lamp may include a main rectifier; an auxiliary rectifier; an inverter, the output of said inverter having a terminal for connecting the fluorescent lamp; a starting device, wherein its first terminal is coupled to a control electrode of one of the switches of the inverter; a pull-down circuit; and a starting capacitor; wherein the second terminal of the starting device and the second terminal of the pull-down circuit are coupled to the first output terminal of the auxiliary rectifier; wherein the starting capacitor is coupled between the first and the second output terminal of the auxiliary rectifier; and wherein there is arranged in parallel with the starting capacitor a series circuit including a first and a second terminal for the LED and an LED switch, wherein the LED switch has a control electrode, an operating electrode and a reference electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.