Interference-resistant compensation for illumination devices
US9247605B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2014 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Oct 9, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and illumination device are provided for interference-resistant compensation in light emitting diode (LED) devices. In one embodiment, the method includes monitoring a detection photocurrent within a lamp during multiple detection intervals interspersed with periods of illumination, applying a drive current sufficient to produce illumination to one of multiple emission LED elements within the lamp during a subsequent measurement interval, and monitoring a measurement photocurrent within the lamp while the drive current is applied. An embodiment of an illumination device comprising a lamp includes multiple emission LED elements, one or more photodetectors, and a lamp control circuit, where the lamp control circuit is adapted to perform steps of the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.