Capacitive touch sensor apparatus having branching electrodes
Assignee1004335 Ontario Inc. Carrying On Business AS A D Metro
InventorsRobert Donald McCulloch, Guy Michael Amyon Farquharson Duxbury, Albert M. David, Gueorgui Pavlov
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Abstract
A capacitive touch sensor comprises a plurality of electrodes on a substrate, and a position of a finger touching the sensor is determined by monitoring output signal changes caused by changes in capacitance caused by the present of the finger over or near the electrodes. The disclosure provides a capacitive touch sensor apparatus comprising a substrate and a plurality of touch sensor electrodes arranged on the substrate. Each of the electrodes comprises a respective primary electrode strip and a respective one or more electrode strip branches extending from the primary electrode strip.
Claims23
A capacitive touch sensor apparatus comprising:
- a substrate;
- a plurality of touch sensor electrodes arranged on the substrate, wherein each said touch sensor electrode of the plurality of touch sensor electrodes comprises a respective plurality of interconnected electrode pads arranged as:
- a respective primary electrode strip;
- and a respective one or more electrode strip branches extending from the respective primary electrode strip, wherein the plurality of touch sensor electrodes comprises first and second sets of electrodes, and the first set of electrodes form crossovers with the second set of electrodes, and, for the each said touch sensor electrode of the plurality of touch sensor electrodes, the respective one or more electrode strip branches of the said touch sensor electrode of the plurality of touch sensor electrodes is interleaved with at least one of the respective one or more electrode strip branches of at least one other of the plurality of touch sensor electrodes such that a total number of pads of the plurality of touch sensor electrodes is at least eight times a total number of crossovers formed by the plurality of touch sensor electrodes.
A capacitive touch sensor system comprising:
- a touch sensor controller;
- a capacitive touch sensor apparatus operatively coupled to the controller, the capacitive touch sensor apparatus comprising a substrate;
- a plurality of touch sensor electrodes arranged on the substrate, wherein each said touch sensor electrode of the plurality of touch sensor electrodes comprises a respective plurality of interconnected electrode pads arranged as:
- a respective primary electrode strip;
- and a respective one or more electrode strip branches extending from the respective primary electrode strip, wherein the plurality of touch sensor electrodes comprises first and second sets of electrodes, and the first set of electrodes form crossovers with the second set of electrodes, and, for the each said touch sensor electrode of the plurality of touch sensor electrodes, the respective one or more electrode strip branches of the said touch sensor electrode of the plurality of touch sensor electrodes is interleaved with at least one of the respective one or more electrode strip branches of at least one other of the plurality of touch sensor electrodes such that a total number of pads of the plurality of touch sensor electrodes is at least eight times a total number of crossovers formed by the plurality of touch sensor electrodes.
An electrode array for a capacitive touch sensor, comprising:
- a plurality of touch sensor electrodes, wherein each said touch sensor electrode of the plurality of touch sensor electrodes comprises a respective plurality of interconnected electrode pads arranged as:
- a respective primary electrode strip;
- a respective first order electrode branch extending from the respective primary electrode strip;
- and one or more respective higher order electrode branches, the one or more respective higher order electrode branches comprising one or more secondary electrode branches extending from the respective first order electrode branch, wherein the plurality of touch sensor electrodes comprises first and second sets of electrodes, and the first set of electrodes form crossovers with the second set of electrodes, and, for the each said touch sensor electrode of the plurality of touch sensor electrodes, one or more electrode strip branches of the said touch sensor electrode of the plurality of touch sensor electrodes is interleaved with at least one of the one or more electrode strip branches of at least one other of the plurality of touch sensor electrodes such that a total number of pads of the plurality of touch sensor electrodes is at least eight times a total number of crossovers formed by the plurality of touch sensor electrodes.
Dependencies are inferred from the claim text.