Driving circuit, and LED circuit and a driving method
US12004276B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 2021 |
| Grant date | Jun 4, 2024 |
| Priority date | — |
| Expiry date | May 29, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A driving circuit comprises a switch mode power converter circuit to convert a supply voltage (e.g. rectified mains), including an energy storage component and a main control switch. The energy storage component discharges to provide a regulated DC current to an output load upon the switching of the main control switch. A time-varying offset is used to modulate the regulated current hereby controlling the voltage across the energy storage component. In this way, the voltage across the energy storage component is maintained above the supply voltage with a safety margin, and this is used to prevent input current spikes and hence prevent an efficiency reduction of the driver circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.