Method and device for transmission of data in an electronic shelf labeling system
US7213751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Dec 30, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2380/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for creating synchronized transmission of messages in a wireless electronic shelf labeling system comprising at least two transmitters, a plurality of receiving label-units and a central processing unit capable of issuing messages to be transmitted via said transmitters. Wherein a first step involves determining, for each transmitter, the signal delay between issuing of a message at the central processing unit and transmission of the message from the transmitter. Wherein a second step involves actively delaying, in response to said determined signal delay, transmission from the individual transmitters such that synchronized transmission from all transmitters is achieved. The present invention further relates to a wireless electronic shelf labeling system and a transmitter for such a system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.