Capacitive gesture detection system and methods thereof

A non-transitory computer-readable medium comprising code that, when executed by a processor, causes an apparatus to:

• receive capacitance measurements measured by at least two capacitive sensors of the hand-held device, including:
• (1) a left capacitive sensor configured to provide capacitance measurements related to a first portion of a hand adjacent to the left side of hand-held device and (2) a right capacitive sensor configured to provide capacitance measurements related to a second portion of the hand adjacent to the right side of hand-held device;
• and
• determine a type of grip of the hand on the hand-held device based on the capacitance measurements, wherein the capacitance measurements include a differential capacitance measurement between the left capacitive sensor and the right capacitive sensor, a single-ended capacitance measurement of the left capacitive sensor, and a single-ended capacitance measurement of the right capacitive sensor;
• and
• access a two-dimensional lookup table, wherein accessing the two-dimensional lookup table comprises:
• looking up a magnitude of the differential capacitance measurement between the left capacitive sensor and the right capacitive sensor;
• and
• looking up the sum of (1) the single-ended capacitance measurement of the left capacitive sensor, and (2) the single-ended capacitance measurement of the right capacitive sensor,
• wherein the intersection of the two-indexed look-ups includes information indicating the type of grip, and
• wherein the type of grip specifies placements of the palm, digits, and thumb on the hand-held device in a particular configuration.

A system for detecting dynamic motion proximate to a hand-held device using environmental capacitive sensing, the system comprising:

• means for measuring a dielectric constant of an object proximate to the hand-held device using a first and second capacitive sensor;
• means for receiving data from the first and second capacitive sensors;
• means for determining the material of the object based on the dielectric constant;
• means for developing a dynamic spatial profile of the object based upon a plurality of electrostatic charge distributions represented in the received data over a predetermine time period;
• means for receiving data from one or more accelerometers disposed in the hand-held device;
• and,
• means for interpreting the dynamic spatial profile as object motion relative to hand-held device in view of data received from one or more accelerometers.