Information display system for displaying information such as pricing information on shelves containing retail merchandise
US5797132A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1995 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Nov 1, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2380/04
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
The invention is directed to an electronic labelling system such as for display pricing information on the edge of shelves in retail supermarkets which system comprises a computer (1), a transceiver (2) connected thereto, as well as electronic tags (4) preferably fixed to shelves, with the transceiver (2) transmitting, by means of electromagnetic waves (5), communications frames to update the tags (4), said frames holding the specific address (7) of a tag (4) as well as the data (8) to be displayed, said tags (4) including a receiver which is periodically activated to receive the communications frames. To reduce the power consumption of the tags (4), it is suggested that the tags (4) comprise devices for synchronizing the receivers, said devices activating the receivers at the same instant in time when a communications frame is being transmitted from the transceiver (2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.