Pyroelectric sensing device
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United States of America Patent
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May 16, 2017
Grant Date -
Jan 21, 2016
app pub date -
Apr 17, 2015
filing date -
Jul 17, 2014
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Abstract
A pyroelectric sensing device includes two pyroelectric sensors and a driving mechanism. The driving mechanism is used for driving the two pyroelectric sensors to shift. When a human body stays motionless in an environment, the two pyroelectric sensors driven by the driving mechanism will shift with respect to the human body, such that the two pyroelectric sensors generate different sensing voltages due to the infrared radiation emitted by the human body. Accordingly, the motionless human body will be detected.
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