How does the Logitech MX Keys proximity sensor work


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Broughton

Just a curiosity question. If I place my hand 1" above the MX keys with no contact the back light comes on, same if covered by an A4 sheet but just a smidge closer. I can't find anything on it Google. I presume it's detecting eletrical charges?

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adrynalyne
1 hour ago, Broughton said:

Just a curiosity question. If I place my hand 1" above the MX keys with no contact the back light comes on, same if covered by an A4 sheet but just a smidge closer. I can't find anything on it Google. I presume it's detecting eletrical charges?

Most likely an IR proximity sensor. 

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