Closed-loop haptic or other tactile feedback system for mobile devices, touch screen devices, and other devices
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United States of America Patent
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Apr 1, 2014
Grant Date -
May 2, 2013
app pub date -
Nov 1, 2011
filing date -
Nov 1, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A system includes an actuator configured to generate vibrations for creating tactile feedback to a user. The system also includes a sensor configured to measure the vibrations generated by the actuator. The system further includes a tactile feedback system configured to drive the actuator in order to generate the vibrations. The tactile feedback system is configured to adjust the driving of the actuator in response to measurements from the sensor. The actuator could include a motor configured to drive an eccentric mass, and the sensor could include an accelerometer and/or a gyroscope. Among other things, the tactile feedback system could be configured to over-drive a motor of the actuator until the measurements from the sensor indicate that vibrations are detected by the sensor and to back-drive the motor of the actuator until the measurements from the sensor indicate that no vibrations are detected by the sensor.
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