Method and apparatus for calibration of a motion sensing device in a portable apparatus
First Claim
1. A method for calibrating a primary motion sensing device in a portable apparatus, wherein the portable apparatus includes a secondary motion sensing device, the method comprising:
- sampling an output of the secondary motion sensing device;
determining if the output of the secondary motion sensing device is indicative of a stationary portable apparatus; and
in response to the output of the secondary motion sensing device being indicative of a stationary portable apparatus, determining a bias offset of the primary motion sensing device from an output of the primary motion sensing device; and
adjusting the output of the primary motion sensing device to remove the effects of the bias offset.
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Accused Products
Abstract
A method and apparatus for calibrating a motion sensing device in a portable apparatus includes sampling an output of a secondary motion sensing device and determining if the output of the secondary motion sensing device is indicative of a stationary portable apparatus. If the output of the secondary motion sensing device is indicative of a stationary portable apparatus, a bias offset of a primary motion sensing device is determined from an output of the primary motion sensing device. The output of the primary motion sensing device is adjusted to remove the effects of the bias offset.
30 Citations
28 Claims
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1. A method for calibrating a primary motion sensing device in a portable apparatus, wherein the portable apparatus includes a secondary motion sensing device, the method comprising:
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sampling an output of the secondary motion sensing device;
determining if the output of the secondary motion sensing device is indicative of a stationary portable apparatus; and
in response to the output of the secondary motion sensing device being indicative of a stationary portable apparatus, determining a bias offset of the primary motion sensing device from an output of the primary motion sensing device; and
adjusting the output of the primary motion sensing device to remove the effects of the bias offset. - View Dependent Claims (2, 3, 4, 5)
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6. A method for calibrating a motion detection unit in a portable apparatus, the motion detection unit supplying a primary output signal and a secondary output signal, the method comprising:
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sampling the primary output signal and the secondary output signal;
determining if at least a portion of the secondary output signal is indicative of a stationary portable apparatus;
in response to at least a portion of the secondary output signal being indicative of a stationary portable apparatus, determining a bias offset of the primary output signal from an average of the primary output signal that corresponds to the portion of the secondary output signal that is indicative of a stationary portable apparatus; and
adjusting the primary output signal to remove the effects of the bias offset. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method for a portable apparatus having a display, the process comprising:
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displaying a cursor and a scene in the display;
moving the portable apparatus;
sensing motion of the portable apparatus using a motion sensing device;
determining if an output of the motion sensing device is indicative of a stationary portable apparatus or a non-stationary portable apparatus;
in response to an output indicative of a stationary portable apparatus, determining a bias offset of the motion sensing device; and
adjusting the output of the motion sensing device to remove the effects of the bias offset. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. An apparatus having a display, the apparatus comprising:
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a primary motion sensor providing an output indicative of apparatus motion;
display circuitry to display a cursor and a scene on the display, wherein the display circuitry repositions the scene in the display based on the primary motion sensor output; and
calibration circuitry to determine a bias offset of the primary motion sensor and adjust the primary motion sensor output to remove the effects of the bias offset. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A portable apparatus comprising:
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means for providing a primary output signal and secondary output signal indicative of apparatus movement;
means for determining if a portion of the secondary output signal is indicative of a stationary portable apparatus;
means for determining a bias offset of the primary output signal from an average of the primary output signal that corresponds to a portion of the secondary output signal that is indicative of a stationary portable apparatus;
means for adjusting the primary output signal to remove the effects of the bias offset.
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28. A computer-readable storage medium containing a set of instructions for calibrating a motion detection unit in a portable apparatus, the motion detection unit supplying a primary output signal and a secondary output signal, the instructions comprising:
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a sampling routine operatively associated with motion detection unit for sampling the primary output signal and the secondary output signal;
a comparison routine for comparing the secondary output signal to a threshold value indicative of a stationary portable apparatus;
an averaging routine for determining a bias offset of the primary output signal from an average of the primary output signal that corresponds to a portion of the secondary output signal that is indicative of a stationary portable apparatus; and
a calibration routine operative coupled with the motion detection unit for adjusting the primary output signal to remove the effects of the bias offset.
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Specification