Touch sensitive screen
First Claim
1. A capacitive sensor comprising:
- a substrate having a first surface and a second surface, the second surface opposite the first surface;
a first electrode on the first surface of the substrate, the first electrode including a first continuous portion of electrode material substantially extending across a sense area of the capacitive sensor;
a second electrode on the second surface of the substrate, the second electrode including a second continuous portion of electrode material substantially extending across the sense area of the capacitive sensor; and
a shorting connection configured to connect between at least two locations on the first electrode,wherein one of the first and second electrodes includes an array of openings, andwherein the other of the first and second electrodes includes an array of filled regions, each of a plurality of the filled regions configured to align with an opening of the array of openings.
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Accused Products
Abstract
A capacitive sensor for determining the presence of an object, such as a user'"'"'s finger or a stylus, is provided. The sensor comprises a substrate, for example made of transparent plastics material, such as PET, on which electrodes are deposited. A resistive drive electrode for example formed of transparent ITO, is arranged on one side of the substrate and a resistive sense electrode, which again may be of transparent ITO, is arranged on the other side of the substrate. Thus an overall transparent sensor may be provided. A shorting connection is also provided which is configured to connect between two locations on one of the electrodes. The electrodes are connected to respective drive and sense channels. By providing the shorting connection between two locations on one or other (or both) of the electrodes, a lower resistance connection is provided between other locations on the electrode and the corresponding drive or sense channel.
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Citations
20 Claims
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1. A capacitive sensor comprising:
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a substrate having a first surface and a second surface, the second surface opposite the first surface; a first electrode on the first surface of the substrate, the first electrode including a first continuous portion of electrode material substantially extending across a sense area of the capacitive sensor; a second electrode on the second surface of the substrate, the second electrode including a second continuous portion of electrode material substantially extending across the sense area of the capacitive sensor; and a shorting connection configured to connect between at least two locations on the first electrode, wherein one of the first and second electrodes includes an array of openings, and wherein the other of the first and second electrodes includes an array of filled regions, each of a plurality of the filled regions configured to align with an opening of the array of openings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification