| 摘要 |
A viewer-presence sensor unit for controlling operation of a television set. The sensor unit first includes a detector for sensing presence of a living being near the television set and a timer for measuring the amount of time of non-presence of a living being. Second, the sensor unit incorporates a power interruption switch activated by the detector for terminating power to the television set upon reaching a measurement of a term of time of non-presence of a living being. Preferably, the term of time is a selectable period, and can range from less than an hour to 24 hours depending upon the needs and viewing habits of a user. Detectors can non-limitedly be chosen from motion sensor and heat sensors, and preferably have utility up to a reasonable viewing distance from the television set. In this manner television sets not in use are automatically turned off to thereby conserve resources otherwise expended as a result of non-viewed operating sets.
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