The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 2000
Filed:
Jun. 13, 1994
George T Briechle, New Canaan, CT (US);
ERS International, Inc., Norwalk, CT (US);
Abstract
An electronic price display system uses an RF communications channel between a central computer and a multiplicity of electronic price display labels. Each label is powered by a voltaic cell ('battery') such as a lithium cell. The receiver-on time, which in other RF-linked systems contributes heavily to the overall battery drain, here does not contribute appreciably to battery drain because a passive RF transceiver is used to receive and address-decode the address portion of received packets. Upon an address match, the passive RF transceiver generates an interrupt to the controller of the display label, and the interrupt prompts the controller to go to a higher-power-drain state to process the received data. If the received command requires a response, the controller of the label generates a response which is transmitted via RF from the label back to the central computer.