Capacitive touch screen with conductive polymer
First Claim
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1. A capacitive touch screen comprising:
- a touch area comprising a substantially transparent conductive polymer acting as a primary signal carrier for making a capacitive coupling to an object at a touch location; and
circuitry connecting the conductive polymer of the touch area to a power source, the circuitry configured to determine the touch location.
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Abstract
A capacitive touch screen is described with a touch area including a substantially transparent conductive polymer. The capacitive touch screen also includes circuitry connecting the conductive polymer of the touch area to a power source, where the circuitry is configured to determine a location of a capacitive coupling on the touch area.
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Citations
44 Claims
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1. A capacitive touch screen comprising:
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a touch area comprising a substantially transparent conductive polymer acting as a primary signal carrier for making a capacitive coupling to an object at a touch location; and
circuitry connecting the conductive polymer of the touch area to a power source, the circuitry configured to determine the touch location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A touch panel for locating a touch point, comprising:
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a current-conducting impedance surface having at least a pair of boundaries, the impedance surface comprising a conductive polymer;
wherein the touch panel is configured to cause a substantially linearized electrical current through the impedance surface, wherein currents passing through a touch point on the impedance surface from each of the boundaries determine a location of the touch point. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A touch sensitive display module comprising:
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a touch area comprising a substantially transparent conductive polymer acting as a primary signal carrier for making a capacitive coupling to an object at a touch location;
circuitry connecting the conductive polymer of the touch area to a power source, the circuitry configured to determine the touch location; and
a display device having a display surface. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A method of making a capacitive touch screen comprising:
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providing a substrate;
forming a touch area on the substrate comprising a substantially transparent conductive polymer, wherein the conductive polymer is configured to act as a primary signal carrier for making a capacitive coupling to an object. - View Dependent Claims (42, 43, 44)
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Specification