Hand held pointing device with roll compensation

Inactive Publication Date: 2014-07-03
MOVEA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a pointing device that compensates for pitch and user-induced acceleration. This is done by performing additional calculations to detect and account for changes in the pointing device's position, temperature, and the user's movement. This allows for accurate detection of the pointing device's roll and reduces the impact of user-induced acceleration. The technical effects of this invention are improved accuracy and stability of pointing device navigation.

Problems solved by technology

A problem with existing three dimensional pointing devices is that if the user naturally holds the device at an angle offset from horizontal, the movement of the pointing device results in a cursor movement that is offset by roll angle, i.e., horizontal movement of the pointing device held at a roll angle results in angled movement of the cursor on the computer screen.
However, a problem with existing roll compensated pointing devices is that they utilize a very complex trigonometric matrix algorithm which requires high powered processors that draw a significant amount of electrical power.

Method used

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  • Hand held pointing device with roll compensation
  • Hand held pointing device with roll compensation
  • Hand held pointing device with roll compensation

Examples

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Embodiment Construction

[0021]With reference to FIG. 1, an embodiment of a hand held motion sensing pointing device 101 is illustrated. The pointing device 101 moves within a three dimensional Cartesian coordinate system defined by the X, Y and Z axes which are perpendicular to each other. The center point of the X, Y and Z coordinate system is the center of rotation of the pointing device 101. The X axis 105 extends across the width of the pointing device 101, the Y axis 107 extending along the center axis and the Z axis 109 extending up from the center of the pointing device 101. The frame of reference for the pointing device 101 is known as the “body frame of reference.”

[0022]The pointing device 101 may include X, Y and Z direction accelerometers 111, 112, 113 that are each mounted orthogonal to each other and detect acceleration and gravity in the X, Y and Z directions. The X, Y and Z direction accelerometers output the acceleration values, AX, AY and AZ that correspond to each directional component of...

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Abstract

A pointing device includes accelerometers and rotational sensors that are coupled to a processor. The processor samples the accelerometers and rotational sensors to detect gravity and pointing device motion and uses algebraic algorithms to calculate roll compensated cursor control signals. The processor transmits the cursor control signals to a receiver that is coupled to an electronic device that moves the cursor on the visual display.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This patent application is a continuation of U.S. patent application Ser. No. 13 / 112,742, “Hand Held Pointing Device With Roll Compensation,” filed May 20, 2011, which is a continuation of U.S. patent application Ser. No. 12 / 147,811, “Hand Held Pointing Device With Roll Compensation,” filed Jun. 27, 2008. U.S. patent application Ser. Nos. 13 / 112,742 and 12 / 147,811 are hereby incorporated by reference in their entirety.BACKGROUND[0002]Pointing devices allow users to move a curser or other indicators on a computer display in response to the user's movement. A normal computer mouse pointing device converts horizontal movement over a planar surface in two dimensions into corresponding curser movement on a computer screen. The mouse includes a sensor that is typically a laser or roller ball sensor that detects movement over a surface.[0003]Other types of pointing devices have been designed which operate in three dimensional space and do not req...

Claims

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Application Information

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IPC IPC(8): G06F3/033
CPCG06F3/033G06F3/0346G06F3/0383
InventorMATHEWS, MICHAELMASON, WALTER M.
OwnerMOVEA