Filter bandwidth adjustment in a multi-loop dimmer control circuit
US8723437B1 · kind B1 · utility
2Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2012 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Dec 10, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/385
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The embodiments disclosed herein describe the adjusting of filter bandwidths in a multi-loop LED dimmer control circuit based on received dimmer input signals. The bandwidth of a filter in an active loop (a loop driving an LED power circuit) is decreased to prevent signal noise and associated LED flickering. Likewise, the bandwidth of a filter in an inactive loop (a loop not driving the LED power circuit) is increased to a pre-determined maximum in order to improve response time and decrease potential overshoot or undershoot during dimmer adjustment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.