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/ MacWorld: Complete Mac Interactive / Macworld Complete Mac Interactive CD)(1994).iso / Handbook Interactive / Trackpad Movie (.mp4) < prev    next >
Apple QuickTime movie  |  1994-06-04  |  9.1 MB  |  320x240  |  15fps  |  1 minute, 6 seconds  |  [MooV/TVOD]
Transcription: The way the product works is around something called, as I mentioned earlier, coupling capacitance. That's the concept where on the trackpad along the bottom row I've got a set of electrodes that send a test pattern out across the pad. As somebody's finger comes close to the trackpad, it changes the capacitance on the pad. So that test pattern is going out and the vertical side of the trackpad is measuring that test pattern. It's in a steady state until the finger comes close. As a finger touches down, it sees it coming. So not only is there an X and Y direction, there is a Z direction. sees t ...