Patent
Capacitance touch slider
Michael J. Sinclair,Ken Hinckley,James T. Kajiya,Nathan C. Sherman +3 more
- 12 Nov 2004
246
TL;DR: In this paper, the capacitance of two conductors resulting from the position of the finger on the conductors was measured by counting the pulses from each oscillator over a time interval, and a ratio-metric measurement was taken by calculating the ratio of the two counts.
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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.
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Citations
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TL;DR: In this article, a touch measurement circuit is configured to identify touch events on a touch sensitive device by comparing a first time period to a second time period, which is representative of a length of time a periodic receive signal carried by a receive electrode is above or below a threshold voltage level.
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Jonah A. Harley
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TL;DR: In this paper, the sense and drive electrodes form an array disposed substantially in two opposing planes that are configured to permit at least one location corresponding to a finger or stylus placed in proximity thereto to be detected thereby.
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TL;DR: In this article, a capacitive sensing-based electronic switch, which incorporates an integrated circuit with processing capability, can only activate by user action in a dedicated area, whereby switch activation occurs only if, at least, a touch is capacitively sensed and criteria based on timing plus sequential touches on capacitive sensors are satisfied.
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Patent
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TL;DR: In this paper, the authors proposed a method of generating a signal comprising providing a capacitive touch sensor pad including a matrix of X and Y conductors, developing capacitance profiles in one of an X direction and a Y direction from the matrix, and determining an occurrence of a single gesture through an examination of the capacitance profile, the single gesture including an application of at least two objects on the capacitive sensor pad.
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Paul Henry Dietz,Darren Leigh +1 more
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TL;DR: A technique for creating a touch-sensitive input device which allows multiple, simultaneous users to interact in an intuitive fashion and results obtained with a small prototype device are presented.
Patent
Paintbrush stylus for capacitive touch sensor pad
Carver A. Mead,Ralph Wolf,Timothy P. Allen +2 more
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TL;DR: In this paper, a touch-sensor pad with a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads is used to produce paint-like strokes on a display associated with the touch sensor pad.
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Larry K. Baxter
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TL;DR: Capacitive sensors in Silicon Technology as discussed by the authors have been shown to have high dielectric properties of various materials, including electret microphones, acceleration sensors, and sensors with different types of connectors.
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Patent
Capacitive position sensor
Harald Philipp
- 05 Oct 2010
TL;DR: In this article, the authors proposed a two-layer electrode structure with branches extending in the first direction part of the way towards each adjacent sense electrode so that end portions of the branches of adjacent sense electrodes co-extend with each other.
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