Circuit for the operation of at least one LED
US9137861B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 9, 2013 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Jan 9, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit for operating at least one LED (“driver circuit”) includes input terminals to be connected to an input or operating voltage in the form of a direct current (DC) voltage or a rectified alternating current (AC) voltage, and output terminals to be connected to a load circuit containing the at least one LED. The circuit includes a clocked switch and a control circuit for clocking the switch. The control circuit is in the form of an integrated circuit (IC) and is provided with input and output pins. The control circuit generates a clock signal for the switch depending on at least two actual value signals, such that there is a control loop with the manipulated variable “clocking of the switch.”
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.