THIN TYPE FINGERPRINT RECOGNITION DEVICE WITH OPTICAL FILTER STRUCTURE
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United States of America Patent
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Dec 9, 2016
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Mar 17, 2016
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Abstract
The present invention discloses thin type fingerprint recognition devices with optical filter structure, it includes a transparent layer, an optical film and an optical sensor, wherein the optical film is formed on a first surface in an embodiment, and is formed on a second surface in another embodiment. With the implementation of the present invention, complex production process or equipments are not required for producing fingerprint recognition devices and reduces costs of production; the size of the fingerprint recognition device is reduced, a variety of thickness choices for transparent layer and more applications are thus possible; and the directivity and the contrast of fingerprint signal is enhanced thus enables making clearer features and characteristics of the fingerprint signal and thus the recognition accuracy of fingerprints.
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