Aimable motion-activated lighting fixture with angulated field
US7375313B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2003 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Nov 29, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motion-activated light fixture having an aimable motion detector with a zonal configuration providing improved monitoring of the region behind the motion detector. In one embodiment the motion detector defines a first plurality of generally forward-looking detection zones for monitoring the region in front of and to the sides of the motion detector, the forward-looking detection zones having a side-to-side coverage angle of at most 180 degrees and having forward zones for monitoring the far region in front of the motion detector. A second plurality of detection zones for monitoring the region behind the motion detector forms a zonal pattern angulated with respect to the zones of the first plurality monitoring the far region. At least some of the detection zones of the second plurality extend generally in the backward direction although in some embodiments the motion detector head must be tilted down through a pre-established offset angle before the angulated zonal pattern begins to look backward. The motion detector may also have other detection zones forming zonal patterns monitoring intermediate regions. The backward looking detection zones are defined so as to look sufficientl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.