Reflected light identification (RLID) device
US10417541B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2016 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | May 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/1408
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reflected light identification (RLID) system uses light to communicate stored information across long distances with minimal interference. The RLID system may include a light source that directs an incident light signal to an RLID structure, which then transmits an encoded light signal to a sensor. The RLID system may include a passive RLID structure (i.e., a structure that does not include power source) such as an RLID reflection surface that includes layered reflective films that reflect the incident light signal back in multiple reflections that serially encodes data. The RLID system may also include an active RLID structure (i.e., a structure that includes power source) that uses energy harvesting to extract and accumulate power from an incident light signal, and then uses the harvested energy to transmit a return signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.