Touch sensor panel having an index matching passivation layer
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United States of America
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Feb 11, 2020
Grant Date -
Nov 5, 2015
app pub date -
Jul 13, 2015
filing date -
Jul 13, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
Touch sensor panels typically include a plurality of layers that can be stacked on top of each other. When the touch sensor panel is used in a bright environment, incident light can hit the interfaces between those layers of the stackup having mismatched refractive indices and can reflect off those interfaces. The light reflected from those interfaces can give rise to the appearance of fringes on the touch sensor panel, which can be visually distracting. In order to reduce the appearance of these fringes, embodiments of the disclosure are directed to the addition of an index matching passivation layer between a conductive layer of traces and an adhesive layer in the touch sensor panel stackup.
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