OBJECT LOCATION
1 Assignment
0 Petitions
Accused Products
Abstract
An apparatus determines the position of a target part of a user'"'"'s hand within a predetermined zone. It has a plurality of transducers for transmitting and/or receiving locating signals. The transducers are arranged such that, for any location of the target hand part within the predetermined zone there are at least two pairings of transmitting transducers and receiving transducers for which the total time-of-flight of said timing signals from the transmitter of the pairing to the receiver of the pairing via the target part of the user'"'"'s hand is less than equivalent total times-of-flight to and from a set of points comprising all points in the predetermined zone which are beyond a minimum spacing from the target hand part but at least as far away from the nearest point of the apparatus as the location of the target hand part is. In some embodiments a selection is made between possible channels to determine which can be used for tracking without suffering from finger/hand confusion.
86 Citations
155 Claims
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1-97. -97. (canceled)
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98. Apparatus for determining the position of a target part of a user'"'"'s hand within a predetermined zone, the apparatus comprising a plurality of transducers for transmitting or receiving, or both transmitting and receiving, locating signals;
- wherein the transducers are arranged such that, for any location of the target hand part within the predetermined zone there are at least two pairings of transmitting transducers and receiving transducers for which the total time-of-flight of said locating signals from the transmitter of the pairing to the receiver of the pairing via the target part of the user'"'"'s hand is less than the equivalent total times-of-flight to and from a set of points, wherein said set of points comprises all points in the predetermined zone which are beyond a minimum spacing from the target hand part but at least as far away from the nearest point of the apparatus as the location of the target hand part is.
- View Dependent Claims (99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125)
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126. Apparatus for determining the position of a target part of a user'"'"'s hand comprising:
- a plurality of transmitter-receiver pairs, means for determining which of said transmitter-receiver pairs is able to meet a predetermined criterion for determining a distance to the target part, and means for providing feedback to the user that the apparatus is capable of tracking the target part depending upon the number of transmitter-receiver pairs meeting said criterion.
- 127. Apparatus for tracking an object comprising a control surface having at least four transducers arranged around the periphery, said transducers comprising at least one transmitter and at least one receiver, thereby defining at least three transmitter receiver pairings, wherein said transducers are arranged such that the separation between the respective transmitter and receiver of each pairing is at least a quarter of the length of the shortest side of the control surface.
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132. Apparatus for determining the position of a target part of a user'"'"'s hand within a predetermined zone, the apparatus comprising a plurality of transducers for transmitting or receiving, or both transmitting and receiving, locating signals;
- wherein the transducers are arranged such that, whenever the target hand part is the closest part of the hand to an predetermined edge of the zone, then for at least one transmitter-receiver pair, the maximum time of flight of a locating signal transmitted by the transmitter, reflected by said target part of the hand and received by the receiver, is shorter by at least a threshold time than the minimum time of flight of a locating signal reflected by parts of the hand which are more than a predetermined distance away from the target part of the hand.
- View Dependent Claims (133)
- 134. Apparatus for tracking movement of an object comprising a plurality of transducers defining between them a plurality of channels, each comprising a transmitter and a receiver, and processing means for selecting a subset of said channels for calculating said movement.
- 144. A method of tracking movement of an object comprising using a plurality of transducers defining between them a plurality of channels, each comprising a transmitter and a receiver, and selecting a subset of said channels for calculating said movement.
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155. A method of determining the position of a target part of a user'"'"'s hand comprising:
- determining which of a plurality of transmitter-receiver pairs is able to meet a predetermined criterion for determining a distance to the target part, and feeding back to a user that the apparatus is capable of tracking the target part depending upon the number of transmitter-receiver pairs meeting said criterion.
Specification