LED driver circuit using flyback converter to reduce observable optical flicker by reducing rectified AC mains ripple
US9730281B2 · kind B2 · utility
2Cited by
1References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2013 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present application describes a driver circuit for supplying a drive current to an LED lighting scheme. In particular, the present invention relates to an AC input driver circuit operable in conjunction with a current regulator device which utilizes a plurality of Zener diodes connected in parallel combinations. The driver circuit comprises a feedback mechanism that is operable to maintain a constant voltage across the current regulator. Embodiments of the present invention seek to address LED ripple and, thus, optical flicker arising from an LED driver, connected at its input, to an AC supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.