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US 10,120,463 B2Granted
Determining forward pointing direction of a handheld device
AssigneeIDHL Holdings, Inc.
InventorsMatthew G. Liberty, Bryan A. Cook
Life of this patent
Estimating the term…
Abstract
A forward pointing direction associated with a handheld device is estimated or determined by, for example, calculating a center of rotation of the device. A resultant combined or selected bias estimate may then be used to compensate the biased output of the sensor in, e.g., a 3D pointing device.
Claims20
An apparatus for determining a forward pointing direction of a device having a user interface, the apparatus comprising:
- an accelerometer for sensing an acceleration of the device and outputting at least one acceleration output;
- at least one sensor for sensing rotation of the device and outputting at least one angular velocity output;
- and
- a processor configured to process the acceleration output and the at least one angular velocity output to calculate a center of rotation of the device and determine the forward pointing direction of the device based on the determined center of rotation of the device.
1 more element
A method for determining a forward pointing direction of a device, the method comprising:
- collecting data associated with the device's acceleration and rotation while the device is in motion;
- and
- calculating of a center of rotation of the device based on the collected data and determining the forward pointing direction of the device based on the calculated center of rotation of the device.
Dependencies are inferred from the claim text.