Capacitance touch slider
First Claim
1. A device for measuring a position of a pointing member, comprising:
- a first capacitive node and a second capacitive node each commonly coupled to a first circuit node; and
a third capacitive node and a fourth capacitive node each commonly coupled to a second circuit node, the first, second, third, and fourth capacitive nodes being disposed so as to be adjacent and interdigitated.
1 Assignment
0 Petitions
Accused Products
Abstract
A device for detecting the position of a human finger or other object on a touch-sensitive scrolling pad. Dual independent oscillators may be used to generate two pulse trains at frequencies dependent upon the capacitance of two conductors resulting from the position of the finger on the conductors. The pulses from each oscillator may be counted over a time interval. A ratio-metric measurement may be taken by calculating the ratio of the two counts, and a sum may also be calculated. The ratio of the two counts relates to finger position on the device, and their sum relates to finger pressure upon the device.
143 Citations
7 Claims
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1. A device for measuring a position of a pointing member, comprising:
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a first capacitive node and a second capacitive node each commonly coupled to a first circuit node; and
a third capacitive node and a fourth capacitive node each commonly coupled to a second circuit node, the first, second, third, and fourth capacitive nodes being disposed so as to be adjacent and interdigitated. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification