×

Highly sensitive inertial mouse

  • US 20060164393A1
  • Filed: 01/24/2005
  • Published: 07/27/2006
  • Est. Priority Date: 01/24/2005
  • Status: Abandoned Application
First Claim
Patent Images

1. A kind of highly sensitive inertial mouse mainly including collecting of data, noise cancellation, setting of threshold of dead zone, tracing of baseline, calculation of displacement and adjustment of sensitivity as signal processing methods as characterized:

  • collecting of data—

    the signal provided by the inertial sensor, amplifier and the analog-to-digital converter is transferred to an accurate acceleration data for further signal processing;

    noise cancellation—

    use all kinds of noise cancellation techniques in order to highly decrease internal and external noise and increase sensitivity;

    setting of threshold of dead zone—

    set at the upper and lower range of the baseline at zero acceleration such that the acceleration noise within the threshold cannot be used for displacement calculation, put acceleration and displacement to be zero and the zone within the threshold is known as the dead zone and unnecessary jitters caused by noise are eliminated in the dead zone;

    the setting of the threshold can be static and dynamic;

    tracing of baseline—

    use all kinds of techniques for dynamic tracing of baseline of inertial sensor at zero acceleration in order to eliminate drift movement of the baseline of the inertial sensor itself and caused by variations in the mouse operation surface such as to avoid miscalculations and unexpected displacements;

    calculation of displacement—

    calculation of displacement starts as soon as signal exits the threshold of dead zone and setting of threshold of dead zone is cancelled whether the succeeding signal is in or out the threshold of dead zone and many kinds of techniques are applied to detect if the action is completed to return to setting of threshold of dead zone;

    one inertial sensor can only detect translational acceleration and is only appropriate to exactly calculate translational displacement and it is necessary to further detect angular acceleration in order to calculate non-translational displacement or the displacement containing angular acceleration;

    adjustment of sensitivity—

    a transfer function is set between the inertial displacement and the computer'"'"'s cursor such that a small movement range of the inertial mouse can be relatively shown as a large movement range on the computer'"'"'s screen and with high resolution.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×