Touch pad with flexible substrate
First Claim
1. A capacitive device, comprising:
- a flexible circuit substrate dimensionally stable up to a first temperature;
a first plurality of conductive pads disposed on the flexible circuit substrate;
a transparent sensor substrate that is dimensionally stable up to a second temperature;
a second plurality of conductive pads disposed on the transparent sensor substrate, wherein a first pad of the first plurality of conductive pads is coupled to a first pad of the second plurality of conductive pads;
a first plurality of transparent sensing elements disposed on the transparent sensor substrate, wherein a first sensing element of the plurality of transparent sensing elements is communicatively coupled to the first pad of the second plurality of conductive pads; and
a second plurality of transparent sensing elements disposed on the transparent sensor substrate, wherein a first sensing element of the second plurality of transparent sensing elements is communicatively coupled to a second pad of the second plurality of conductive pads, wherein the first and second plurality of transparent sensing elements are disposed on a same side of the transparent sensor substrate, and configured to detect changes in capacitance.
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Accused Products
Abstract
A touch sensor device is provided that uses a flexible circuit substrate to provide an improved input device. Specifically, the present invention uses a touch sensor controller affixed to the flexible circuit substrate, which is coupled to a sensor component to provide a flexible, reliable and cost effective touch sensor suitable for a wide variety of applications. In one embodiment the touch sensor uses a flexible circuit substrate that provides relatively high temperature resistance. This allows the touch sensor controller to be affixed using reliable techniques, such as various types of soldering. The sensor component can comprise a relatively low-temperature-resistant substrate that can provide a cost effective solution. Taken together, this embodiment of the touch sensor provides reliability and flexibility at relatively low cost.
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Citations
20 Claims
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1. A capacitive device, comprising:
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a flexible circuit substrate dimensionally stable up to a first temperature; a first plurality of conductive pads disposed on the flexible circuit substrate; a transparent sensor substrate that is dimensionally stable up to a second temperature; a second plurality of conductive pads disposed on the transparent sensor substrate, wherein a first pad of the first plurality of conductive pads is coupled to a first pad of the second plurality of conductive pads; a first plurality of transparent sensing elements disposed on the transparent sensor substrate, wherein a first sensing element of the plurality of transparent sensing elements is communicatively coupled to the first pad of the second plurality of conductive pads; and a second plurality of transparent sensing elements disposed on the transparent sensor substrate, wherein a first sensing element of the second plurality of transparent sensing elements is communicatively coupled to a second pad of the second plurality of conductive pads, wherein the first and second plurality of transparent sensing elements are disposed on a same side of the transparent sensor substrate, and configured to detect changes in capacitance. - View Dependent Claims (2, 3, 4, 5)
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6. A capacitive device comprising:
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a flexible circuit substrate that is dimensionally stable up to a first temperature, a first plurality of conductors disposed on the flexible circuit substrate; and a first plurality of conductive pads disposed on the flexible circuit substrate and coupled to the first plurality of conductors, wherein the first plurality of conductive pads is configured to couple to a second plurality of conductive pads disposed on a sensor substrate, wherein the sensor substrate is dimensionally stable up to a second temperature that is lower than the first temperature and wherein the capacitive sensor substrate is not dimensionally stable at the first temperature, wherein the capacitive device is configured to detect changes in capacitance. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A capacitive device comprising:
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a sensor substrate; a first plurality of conductor pads disposed on the sensor substrate, wherein the first plurality of conductor pads is configured to be coupled to a second plurality of conductor pads disposed on a flexible circuit substrate that is dimensionally stable up to a first temperature, wherein the sensor substrate is dimensionally stable up to a second temperature that is lower than the first temperature and wherein the sensor substrate is not dimensionally stable at the first temperature; a first plurality conductors disposed on the sensor substrate and coupled to the first plurality of conductor pads; and a first plurality of sensing elements disposed on the sensor substrate and coupled to the first plurality of conductors, wherein the sensing elements are configured detect changes in capacitance. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification