Importance

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Abstract

A proximity sensor with movement detection is provided. The proximity sensor may include an ASIC chip; at least three light sources configured to emit light in a particular sequence; and a photo detector configured to receive light and generate an output signal. The proximity sensor may have a compact size package, wherein the photo detector may be stacked on the ASIC chip and disposed at a substantially equal distance from the at least three light sources. The proximity sensor includes a driver operable to generate a current to a plurality of light sources in a particular timing sequence, a photo detector configured to receive light and generate an output signal, an ASIC configured to report the movement of an object near the proximity sensor if the output signal pattern generated matches one of the output signal patterns from among a set of known output signal patterns. The proximity sensor may be configured to be used as a counter or an on/off switch based on particular movements detected.

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First Claim