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My interior light switch is a pain to find. The little pushbutton for the spotlight evades detection by seemingly moving about the headliner.
But I don't want it to be continuously lit up with a backlight.
One solution is to briefly switch the backlighting on when a person's hand is near it (so
called proximity detection). This might be useful for other switches as well.
US patent 6,107,930
http://patft.uspto....07930&RS=PN/6107930
Security system keypad illuminated by proximate motion [xaviergisz, May 18 2005]
[link]
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It would be really interesting to compare the cost of (a) proximity detector vis-a-vis (b) continuously lit backlight. |
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As a wild guess the cost ratio (a)/(b) would be ~ 500. |
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Perhaps it could respond with the door unlock button or proximity device on the keyfob. Then again, your lights could probably just come on automagically. |
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Some of those switches are hooked into the vehicle diagnostic systems by way of the body controller. Mess with them and your mechanic will have you by the short hairs. |
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I was one of those voting +. Just wanted to let you know. |
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