Thread: PRS-505 Battery life starting to go fast
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Old 11-13-2010, 02:03 AM   #20
adityadubey
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Quote:
Originally Posted by rkomar View Post
Strange. I thought that it was using infrared sensors. I wouldn't expect the scarf to be warmer or colder than ambient conditions. I wonder how it works.
I don't think temprature has anything to do with it, its more optical with a grid of infrared beams spanning the screen which then register the location whenever any object impedes their path. The CNET link above has an illustrative picture.
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