Visible-light based communication and occupancy detection
US9755741B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 2015 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | Jun 5, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/116
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A lighting device for illumination, data communication, and occupancy detection includes a processor and a transmitter circuit that is configured to generate a first electrical signal. During a first time duration, the first electrical signal is a carrier signal having a first frequency, and during a second time duration, the first electrical signal is a data encoded signal. The lighting device further includes a light source configured to emit a first visible light based on the first electrical signal. The lighting device also includes a receiver configured to receive a second visible light. The processor is configured to detect a motion in a monitored area based on the second visible light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.