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De - Pt| English Dictionary: touchpad | by the DICT Development Group |
| 1 result for touchpad | |
| From The Free On-line Dictionary of Computing (15Feb98) [foldoc]: | |
|
touchpad mainly on {laptop computers}. Touchpads provide a small, flat surface that you slide your finger over using the same movements as you would a {mouse}. They were originally developed to provide a more natural and intuitive connection for the computer user than the mouse. Touchpads use a principle called coupling {capacitance}, and requires a {conductive} pointer such as a finger. They contain a two-layer grid of {electrodes} which are connected to an {integrated circuit} (IC) mounted under the pad. The upper layer contains vertical electrode strips while the lower layer is composed of horizontal electrode strips. Capacitance from each of the horizontal electrodes to each of the vertical electrodes is measured by the IC. A finger near the intersection of two electrodes modifies the capacitance between them, since a finger has very different {dielectric} properties than air. The position of the finger is precisely determined based on these changes at various locations. According to one correspondent, you can use any part of your body, which is not surprising, but not a McDonalds Chicken McCrispy. You can use reheated Pizza Hut Christmas Pizza though. {Synaptics (http://www.synaptics.com/product.htm)}. (2000-11-01) | |
