Communication system
US6400482B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1999 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Apr 14, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/116
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communications network comprised of a source of information to be transmitted in the form of a signal, one or more transmitters which emit light suitable for illumination and including means for modulating the light with the information signal, a medium such as a fluid through which the light passes, and one or more receivers for receiving the light and demodulating the signal to obtain the information. A user for the information may be a device, such as a computer or a compact disk player, or it may be a person, perhaps with some form of sensory or mental impairment. The information may be encrypted, may provide directional guidance, such as to a user moving in a vehicle, and/or may be transmitted simultaneously over multiple channels. Various types of visible light assemblies may be employed, with varying power inputs and outputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.