Controlling at least two series-connected light-emitting diodes of a lighting device
US11343893B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2018 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Jul 30, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for controlling at least two light-emitting diodes connected in series of a circuit assembly of a lighting device may include supplying the light-emitting diodes with a specifiable current by means of a controllable current source unit. The method may include connecting a bypass element in parallel with at least one of the light emitting diodes. The method may include detecting an electric supply voltage to the series circuit of the light-emitting diodes and the current source circuit, and controlling an electric conductivity of the bypass element based on the detected electric supply voltage and/or the light-emitting diode current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.