I don't read that patent as nonsensical or spurious at all. Apple already uses "invisible" lights on their MacBook Pro computers to hide the LED next to the we

I don't read that patent as nonsensical or spurious at all. Apple already uses "invisible" lights on their MacBook Pro computers to hide the LED next to the webcam. You only see the LED light up when the cam comes on. The rest of the time, it looks like part of the enclosure. It looks like this patent goes a step beyond, and incorporates touch sensing to make that kind of LED into a virtual button.