RESISTIVE AND CAPACITIVE TOUCHPAD
First Claim
Patent Images
1. An input device comprising:
- a resistive sensor for detecting a first type of pointing element; and
a capacitive sensor for detecting a second type of pointing element, wherein the input device operates in a first mode when the first type of pointing element is detected, and the input device operates in a second mode if the second type of pointing element is detected.
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Abstract
A touchpad having the advantages of resistive and capacitive type sensors. A capacitive sensor is stacked above a 5-wire resistive sensor. The touchpad is of integrated manufacture with one of conductive plates of the resistive sensor printed on a first substrate, and the other conductive plate printed on the second substrate with the capacitive sensor. The touchpad is configurable to distinguish between a finger and a pen, and operate in different modes depending on which is being used.
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Citations
29 Claims
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1. An input device comprising:
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a resistive sensor for detecting a first type of pointing element; and
a capacitive sensor for detecting a second type of pointing element, wherein the input device operates in a first mode when the first type of pointing element is detected, and the input device operates in a second mode if the second type of pointing element is detected. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An input device comprising:
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a first substrate, the first substrate having printed thereon;
a resistive plane;
a low resistive frame;
a routing layer; and
a spacer frame;
a second substrate, the second substrate having printed thereon;
a sensor plane;
a first plurality of traces substantially disposed in a first direction;
a second plurality of traces substantially disposed in a second direction; and
a first dielectric separating the first plurality of traces from the second plurality of traces;
a second dielectric separating the first plurality of traces from the sensor plane;
wherein the first substrate is coupled to the second substrate such that the sensor plane is separated from the resistive plane by the spacer frame, whereby displacement of the sensor plane causes the sensor plane to contact the resistive plane. - View Dependent Claims (8, 9, 10, 11)
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12. A method of detecting the position of a pointing element on an input device comprising the steps of:
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providing a resistive sensor and a capacitive sensor;
if the capacitive sensor detects a pointing element, then ignoring the resistive sensor; and
determining the position of the pointing element with the capacitive sensor; and
if the capacitive sensor does not detect a pointing element then determining the position of the pointing element with the resistive sensor. - View Dependent Claims (13)
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14. A method of operation for a touchpad comprising the steps of:
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detecting a pointing element; and
determining if the pointing element is a first type of pointing element or second type of pointing element. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A digital system comprising:
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an input device including a resistive sensor for detecting a first type of pointing element and a capacitive sensor for detecting a second type of pointing element;
code executing on the digital system, wherein the code operates in a first mode when the first type of pointing element is detected and in a second mode when the second type of pointing element is detected. - View Dependent Claims (27)
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28. An input device comprising:
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a capacitive sensor; and
a 5-wire resistive sensor. - View Dependent Claims (29)
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Specification