Patent · US Active

Low power adaptive linear resonant actuator driver using accelerometer

US10868486B2 · kind B2 · utility

3Cited by

5References

18Claims

0Family size

Assignee

AMBIQ MICRO, INC. · US

Inventors

Yousof Mortazavi · Austin, US
Scott Hanson · Savage, US

Key dates

Filing date	Apr 9, 2019
Grant date	Dec 15, 2020
Priority date	—
Expiry date	Apr 9, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG01P15/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An accelerometer and a linear resonant actuator (LRA) are mechanically coupled, such as by being mounted to the same circuit board. The output of the accelerometer is evaluated in order to select a drive frequency for the LRA. For example, the drive frequency may be varied while measuring the magnitude of acceleration induced by the LRA. The output of the accelerometer may further be used to perform a fitness tracking function, such as counting steps or detecting an activity level.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.