Interior lighting system having window with band pass filter coordinated with broad/narrow band light source to provide privacy mode
US10286839B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2017 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Aug 17, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/48
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system includes a space with at least one window separating an interior space from an exterior space; band-pass filter layers provided in the window and configured to block narrowband light; and a light source provided in the interior space and including at least red, green and blue light emitting diodes. The light source is configured to selectively provide broad spectrum white light and narrowband light blocked by the filter layers in the window, such that the interior space is visible from the exterior space through the window when illuminated by the broad spectrum light, but not visible when illuminated by the narrowband light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.