TOUCHSCREEN WITH CARBON NANOTUBE CONDUCTIVE LAYERS
First Claim
1. A touchscreen comprising touch side and device side electrodes wherein each electrode comprises in order an insulating substrate, an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein said exposed electrically conductive layers comprise single wall carbon nanotubes and wherein said carbon nanotubes comprise covalently attached hydrophilic species.
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Abstract
The present invention is directed to a touchscreen comprising touch side electrode and device side electrode wherein each electrode comprises an insulating substrate and an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein only one of the exposed electrically conductive layers comprises carbon nanotubes.
97 Citations
31 Claims
- 1. A touchscreen comprising touch side and device side electrodes wherein each electrode comprises in order an insulating substrate, an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein said exposed electrically conductive layers comprise single wall carbon nanotubes and wherein said carbon nanotubes comprise covalently attached hydrophilic species.
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20. A touchscreen comprising touch side and device side electrodes wherein each electrode comprises in order an insulating substrate, an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein said exposed electrically conductive layers comprise single wall carbon nanotubes and wherein said carbon nanotubes comprise covalently attached hydrophilic species;
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wherein said touchscreen has a visible light transparency of greater than 70 percent.
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26. A touchscreen comprising touch side and device side electrodes wherein each electrode comprises in order an insulating substrate, an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein said exposed electrically conductive layers comprise single wall carbon nanotubes and wherein said carbon nanotubes comprise covalently attached hydrophilic species;
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wherein said touchscreen has a visible light transparency of greater than 70 percent; and wherein the average force required to actuate a point on the touchscreen does not change by more than 100 percent over 500,000 single point actuations.
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27. A device comprising a display device having attached thereto a touchscreen comprising touch side and device side electrodes wherein each electrode comprises an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein at least the first electrically conductive layers or the exposed electrically conductive layers comprise carbon nanotubes and wherein said carbon nanotubes comprise covalently attached hydrophilic species;
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wherein said touchscreen has a visible light transparency of greater than 70 percent. - View Dependent Claims (28, 29, 31)
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30. A touchscreen comprising touch side and device side electrodes wherein each electrode comprises in order an insulating substrate, an exposed electrically conductive layer, wherein said exposed electrically conductive layers are adjacent and separated by dielectric spacers, and wherein said exposed electrically conductive layers comprise single wall carbon nanotubes and wherein said carbon nanotubes comprise covalently attached hydrophilic species:
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wherein the average force required to actuate a point on the touchscreen does not change by more than 50 percent over 500,000 single point actuations.
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Specification