Drive circuit for at least one LED strand
US7061394B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2003 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Sep 26, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/385
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Drive circuit for at least one LED strand, with a switch being arranged in series with each LED strand and with each LED strand having a supply connection via which it can be connected to a supply voltage, in which case each switch can be driven so as to allow a current to flow in the associated LED strand, having a first control loop which is designed to drive the switch of the at least one LED strand such that an adjustable mean value is achieved for the current flowing through the LED strand, with the drive circuit also having: a second control loop which is designed to provide a supply voltage for the at least one LED strand as a function of the peak value of the current flowing through the at least one LED strand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.