Optical finger navigation module for extreme temperature operation and method for increasing life time of OFN module
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United States of America Patent
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Oct 3, 2017
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app pub date -
Mar 21, 2016
filing date -
Mar 21, 2016
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Abstract
An optical finger navigation module includes a light source mounted below a window plate formed on a housing of the module, a driver for outputting a current to the light source, an environmental sensor for sensing an environmental condition and providing a signal, and a sensor integrated circuit including a processor coupled with the environmental sensor for reading the signal and generating a compensated current that corresponds to the signal based on a compensation curve tailor-made for the light source and derived from a compensation algorithm using compensation factors. A method for increasing lifetime of the module is also disclosed.
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