SIRI for iPone 4S is magnificent and knows when you are there. Like every smartphone has its share of sensors — little doodads that know when you’re “steering” that awesome car in that awesome game, or making sure you come back home safe by knowing which way is North — and the iPhone 4S is no different in this regard.
Now that the teardown is wrapped up, we’ve re-opened the mystery and made a neat discovery about the 4S: that black component is an infrared LED, and the little bugger almost always wants to know if you’re nearby.
It’s no innovation for the iPhone to integrate an infrared proximity sensor. In iPhones past, the IR proximity sensors would only switch on when a phone or Skype call was initiated. The sensor could detect that a face was near and then smartly dim the display / kill the keyboard, and then resume normal activity once it detected the face was not in close proximity anymore. Read More
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