Detection and removal of snow and ice on a lens of a light emitting diode lighting fixture
US8563898B1 · kind B1 · utility
13Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2011 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Dec 27, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting diode (LED) lighting fixture has monitoring and control circuits that sense when a freezing condition is present that could result in ice and/or snow accumulation on a lens of the LED lighting fixture, thereby reducing the light output therefrom. Heat may be supplied to the lens from a transparent resistive coating thereon, an internal space heater and/or increased power dissipate from the LEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.