Method and apparatus for controlling transponder signaling
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United States of America Patent
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May 5, 1998
Grant Date -
N/A
app pub date -
Mar 25, 1996
filing date -
Mar 25, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A battery powered transponder in a vehicle for communicating with a toll station or weigh station lights one of a few LEDs to indicate whether a bypass of the station is authorized or denied. A transmit/receive circuit sends data to an IC which signals the instruction to a microprocessor which is programmed to activate the proper LED when so instructed for a short period and then maintains a recall state for a long period. A pushbutton switch connected to the microprocessor, if operated within the long period, triggers a replay of the proper LED to verify the instruction while minimizing power consumption.
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