Determining forward pointing direction of a handheld device
First Claim
Patent Images
1. 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 Assignment
0 Petitions
Accused Products
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.
-
Citations
20 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. 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. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
-
Specification