Touch sensitive screen
First Claim
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1. A capacitive sensor comprising:
- a substrate;
a first electrode on a first surface of the substrate, the first electrode comprising;
a first continuous portion of electrode material substantially extending across a sense area of the capacitive sensor, anda first opening; and
a second electrode on a second surface of the substrate, the second surface opposite the first surface, the second electrode being electrically insulated from the first electrode by the substrate, the first and second electrodes configured to capacitively couple a charge between the first and second electrodes, the second electrode comprising;
a second continuous portion of electrode material substantially extending across the sense area of the capacitive sensor; and
a filled region configured to align with the first opening of the first electrode.
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Accused Products
Abstract
One embodiment provides a capacitive sensor for determining the presence of an object, such as a user'"'"'s finger or a stylus. The sensor includes a substrate on which electrodes are deposited. A resistive drive electrode is arranged on one side of the substrate and a resistive sense electrode is arranged on the other side of the substrate. A shorting connection connects between two locations on one of the electrodes. The electrodes are connected to respective drive and sense channels.
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Citations
21 Claims
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1. A capacitive sensor comprising:
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a substrate; a first electrode on a first surface of the substrate, the first electrode comprising; a first continuous portion of electrode material substantially extending across a sense area of the capacitive sensor, and a first opening; and a second electrode on a second surface of the substrate, the second surface opposite the first surface, the second electrode being electrically insulated from the first electrode by the substrate, the first and second electrodes configured to capacitively couple a charge between the first and second electrodes, the second electrode comprising; a second continuous portion of electrode material substantially extending across the sense area of the capacitive sensor; and a filled region configured to align with the first opening of the first electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A control panel comprising:
a capacitive sensor comprising; a substrate; a first electrode on a first surface of the substrate, the first electrode comprising; a first continuous portion of electrode material substantially extending across a sense area of the capacitive sensor, and a first opening, the substrate being solid in a region configured to align with the first opening of the first electrode; and a second electrode on a second surface of the substrate, the second surface opposite the first surface, the second electrode comprising; a second continuous portion of electrode material substantially extending across the sense area of the capacitive sensor; and a filled region configured to align with the first opening of the first electrode. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. An apparatus comprising:
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a capacitive sensor comprising; a substrate; a first electrode on a first surface of the substrate, the first electrode comprising; a first continuous portion of electrode material substantially extending across a sense area of the capacitive sensor, and a first opening, the substrate being solid in a region configured to align with the first opening of the first electrode; and a second electrode on a second surface of the substrate, the second surface opposite the first surface, the second electrode comprising; a second continuous portion of electrode material substantially extending across the sense area of the capacitive sensor; and a filled region configured to align with the first opening of the first electrode; a cover panel overlying the capacitive sensor; and a processing unit.
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Specification