Touch sensitive display with graded index layer
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United States of America Patent
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May 29, 2018
Issued Date -
N/A
app pub date -
May 6, 2016
filing date -
Sep 22, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An electronic device may include multiple display layers. The display layers may include a matching layer implemented using multiple graded index of refraction sublayers to help minimize reflections. The matching layer may include a first sublayer having a monotonically increasing index of refraction, a second (reverse matching) sublayer having a monotonically decreasing index of refraction, and a third sublayer having a monotonically increasing index of refraction. The second reverse matching sublayer may serve to induce an optical path difference that results in destructive inference at one or more specific wavelengths. The thickness of the reverse matching sublayer may be tuned to center the destructive interference at the desired wavelength(s). If desired, multiple matching layers each having their own reverse matching layers may be stacked on top of one another to provide reflectance suppression at multiple wavelengths.
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Cited Art Landscape
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