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HAND HELD POINTING DEVICE WITH ROLL COMPENSATION

  • US 20120194426A1
  • Filed: 05/20/2011
  • Published: 08/02/2012
  • Est. Priority Date: 06/27/2008
  • Status: Active Grant
First Claim
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1. A pointing device for controlling movement of a cursor on an electronic display comprising:

  • a processing unit containing executable instructions for;

    (a) receiving a first rotational velocity signal RX, a second rotational velocity signal RZ, a first acceleration signal AX in response to a gravitational acceleration in a first direction along the first axis and a second acceleration signal AZ in response to a gravitational acceleration in a second direction along the second axis, (b) calculating a vector sum AXZ of AX and AZ, (c) calculates algorithms that do not include trigonometry functions to provide roll-compensation cursor movement signals Xcomp and Ycomp, and (d) transmitting the roll-compensated cursor movement signals.

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