Appeal No. 1998-0957
Application 08/258,409
a housing having a power source, a display controller and an
RF transceiver therewithin. Of particular note is that the
display controller is powered by the power source whereas the
RF transceiver is not powered by the power source.
Representative claim 1 is reproduced as follows:
1. An electronic price display system comprising a
central computer and an RF transceiver communicatively coupled
therewith, and further comprising a multiplicity of electronic
price display labels each with a unique address, each
electronic price display label comprising:
a housing,
a display within the housing,
a power source within the housing,
a controller within the housing and controlling the
display and powered by the power source,
a passive RF transceiver within the housing and not
powered by the power source,
an antenna communicatively coupled with the
transceiver, the controller further characterized in having a
clock speed switchable between a high speed and a low speed,
the low speed selected to be sufficient to control the
display, the controller comprising an interrupt input causing
a switch to the high speed,
the transceiver further characterized in having a register
defined to contain the unique address of the label, and in
having means responsive to received RF energy at the antenna
for receiving an address modulated in the RF energy, for
testing for a match between the unique address of the label
and the received address, and for generating an interrupt
2
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