PIXEL SENSOR DEVICE AND OPERATING METHOD THEREOF
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United States of America Patent
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Issued Date -
Feb 18, 2016
app pub date -
Jun 1, 2015
filing date -
Aug 14, 2014
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Abandoned
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Abstract
A pixel sensor device has a first sensing unit, a second sensing unit, a first control and reading unit, and a second control and reading unit. The first and second sensing units are disposed concentrically. The first and second control and reading units are connected respectively to the first and second sensing units for separately or simultaneously controlling the first and second sensing units to perform sensing. Since the first and second sensing units are formed by a single pixel sensing array and arranged concentrically, only a single focusing element is required to align centers of the first and second sensing units during the manufacturing process. This achieves high focus accuracy and increases precision in recognition. In the applications of fingerprint recognition and pulse measurement, the user only uses a single finger for sensing so that inaccurate focusing resulted from moving finger is avoided.
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