Optical navigation module with capacitive sensor
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United States of America Patent
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Aug 11, 2015
Grant Date -
Dec 20, 2012
app pub date -
Sep 29, 2011
filing date -
Jun 16, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
Optical navigation modules and methods of operating the same to sense relative movement between the optical navigation module and a tracking surface are provided. In one embodiment, the optical navigation module comprises: (i) a light source to illuminate at least a portion of a surface relative to which the optical navigation module is moved; (ii) an integrated circuit (IC) including a photo-detector array (PDA) to detect a light pattern propagated onto the PDA from the surface, and a signal processor to translate changes in the light pattern propagated onto the PDA into data representing motion of the optical navigation module relative to the surface; and (iii) a substrate to which the light source and IC are mounted, the substrate including an aperture in a light path between the surface and the PDA. Other embodiments are also disclosed.
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