Photovoltaic receiver optimised for communication by coded light
US10461861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2016 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Dec 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/07953
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A coded-light communication device is described, in which the communication has an initial signal-to-noise ratio, which varies according to the lighting conditions. The device comprises at least one photodetector-type light receiver comprising an anode and a cathode and having an initial shunt resistance. The receiver is capable of being simultaneously exposed to a coded light source carrying a signal and a non-coded light source. The anode and cathode are short-circuited by at least one short-circuit resistance arranged inside the photodetector, having a value selected so that the new value of the shunt resistance of the photodetector resulting from the connection of the initial shunt resistance and the short-circuit resistance gives the communication device a new resultant signal-to-noise ratio which remains substantially independent of the intensity of the non-coded light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.