PRESENCE DETECTION DEVICE
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United States of America Patent
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Issued Date -
Aug 8, 2013
app pub date -
Feb 5, 2013
filing date -
Feb 6, 2012
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Abstract
A user presence detection device includes a camera module with a silicon-based image sensor adapted to capture an image and a processing device configured to process the image to detect the presence of a user. The camera module further includes a light filter having a lower cut-off wavelength of between 550 nm and 700 nm and a higher cut-off wavelength of between 900 nm and 1100 nm.
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