Position dependent information retrieval system
US7123159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2002 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | Oct 29, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/1149
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A position dependent information retrieval system is disclosed including a light source having a driver and an encoder. The driver and the encoder are coupled to the light source so that the light source produces a modulated light signal in accordance with a predetermined signature. The system also includes a receiver having a photosensitive detector capable of detecting the modulated light signal and a decoder capable of decoding the predetermined signature. A controller is communicatively coupled to the receiver, a memory and output device. The controller is arranged to receive the decoded predetermined signature, based upon the decoded predetermined signature, obtain at least one localized message in the memory, and output the localized message using the output device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.