FINGERPRINT SENSING MODULE
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United States of America Patent
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May 25, 2017
app pub date -
May 4, 2016
filing date -
Nov 22, 2015
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Abstract
A fingerprint sensing module includes a sensing unit having a sensing surface, a light source arranged beside the sensing unit, and an optical covering film arranged on the sensing unit. The optical covering film covers the sensing surface. The optical covering film includes a touching surface and a connecting surface opposite to the touching surface. The touching surface is suitable for being in touch with a finger of a user, and the connecting surface is connected to the sensing surface. A refractive index of the optical covering film increases from the connecting surface to the touching surface. The light source is suitable for emitting light to the touching surface, so as to irradiate the finger of the user.
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