Exhibit explaining system activated by infrared signals
US5461371A · kind A · utility
39Cited by
12References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1992 |
| Grant date | Oct 24, 1995 |
| Priority date | — |
| Expiry date | Nov 4, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2027/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An exhibit explaining system includes transmitters and a portable information playback device. The transmitters transmits, in a wireless manner, identification signals respectively assigned to exhibits individually arranged at predetermined spatial intervals. The identification signal may be transmitted using infrared light or radio waves. When receiving the identification signal, the playback device reproduces and outputs prestored explanatory information as specified by the identification signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.