Method of minimizing power consumption within an electronic price label
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United States of America Patent
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Mar 28, 2000
Grant Date -
N/A
app pub date -
Nov 13, 1997
filing date -
Nov 13, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A method of minimizing power consumption within an electronic price label (EPL) which conserves battery life. A time period for removing power from a transceiver within the EPL is determined by a computer from price change frequency data. A message to control circuitry within the EPL is sent by the computer as soon as possible following a change in price displayed by the EPL. The message includes a command to remove power from the transceiver and the power down time period. Power is removed from the transceiver by the control circuitry. The control circuitry counts until the power down time period is exhausted. Power is applied to the transceiver by the control circuitry when the power down time period is exhausted. Finally, a first time within the control circuitry is synchronized by the control circuitry to a second time indicated by the computer after the power down timer period is exhausted and before any additional message is sent to the EPL.
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