Drive for light-emitting diodes
US6826059B2 · kind B2 · utility
37Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2002 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Sep 30, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit and a method for controlling light emitting diodes (D1, D2) for illumination involve an inverter whose output frequency can be varied. The inverter includes two electronic switches (S1, S2) which convert an applied direct current voltage (Uo) into an alternating voltage. A load circuit is connected to the output of the inverter and includes a resonance element and at least one light emitting diode (D1, D2) whose brightness is controlled by altering the output frequency of the inverter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.