LED driving arrangement and driving method
US12028946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2021 |
| Grant date | Jul 2, 2024 |
| Priority date | — |
| Expiry date | Jul 12, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A LED driving arrangement has a main converter stage and a power commutation stage in parallel with an LED unit. An energy divert mode of operation is used during which a set current is provided to the LED unit, and the main converter stage is used to deliver a current larger than the set current. The power commutation stage is used to divert energy from the LED unit and return the diverted energy to an input to the main converter. The remaining set current is delivered to the LED unit. This enables deeper dimming than the dimming level applied to the main converter stage, but without requiring an additional switch mode power converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.