System for displaying at a remote station data generated at a central station and for powering the remote station from the central station
First Claim
1. A system for displaying at at least one remote station data generated at a central station and for powering the remote station from the central station, said system comprising:
- means at the central station for generating a data signal;
means at the central station for generating a power signal;
means at the central station for time multiplexing the data signal and power signal over a plurality of successive cycles so that said data signal occurs during a first interval of each cycle and said power signal occurs during a second interval of each cycle;
transmission means for transmitting the time multiplexed signals to the remote station;
storage means at the remote station responsive to the transmitted time multiplexed signals for storing said power signal; and
display means at the remote station for displaying said data signal, said display means being powered by said storage means during said first interval of each cycle.
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Accused Products
Abstract
A system for displaying at a remote station data generated at a central station and for powering the remote station from the central station. A power signal is generated at the central station and time multiplexed with the data and then transmitted to the remote station. An energy storage device at the remote station is responsive to the transmitted power signal to provide energizing power for the circuits at the remote station during the time interval data is being transmitted to the remote station. Typically, the data is time of day information and the remote station effects remote display of the time.
Energizing power for the circuits at the remote station is provided by the power signal itself during the time this signal is transmitted. Preferably the energy storage device is a capacitor which is charged by the power signal during the time the power is transmitted and is slightly discharged during the time the data is transmitted to energize the circuits at the remote station. The transmitted time of day data is pulse width modulated and decoder circuitry at the remote station is responsive to the transmitted data to effect decoding thereof.
18 Citations
13 Claims
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1. A system for displaying at at least one remote station data generated at a central station and for powering the remote station from the central station, said system comprising:
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means at the central station for generating a data signal; means at the central station for generating a power signal; means at the central station for time multiplexing the data signal and power signal over a plurality of successive cycles so that said data signal occurs during a first interval of each cycle and said power signal occurs during a second interval of each cycle; transmission means for transmitting the time multiplexed signals to the remote station; storage means at the remote station responsive to the transmitted time multiplexed signals for storing said power signal; and display means at the remote station for displaying said data signal, said display means being powered by said storage means during said first interval of each cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification