Eliminating mirror symmetry and gravity ambiguity from a 2d mesh of devices
AssigneeSignify Holding B.V.
InventorTEWE HIEPKE HEEMSTRA
Life of this patent
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Abstract
A mechanism for handling mirror symmetry and gravity ambiguity in a two-dimensional mesh of devices. A direction of gravity with respect to a first device, of a trio of devices, is determined by a gravitational sensor comprised in the first device. A relative direction of a second and third device with respect to the first device is then ascertained. The direction of gravity, and the relative directions of the first and third device, are then used to determine a handedness of a triangle connecting the three devices with respect to gravity. This handedness with respect to gravity can be propagated throughout the mesh of devices and used to eliminate mirror symmetry and gravity ambiguity in the mesh.
Claims15
A computer-implemented method for determining the handedness, with respect to gravity, of a hypothetical triangle connecting a set of three devices,
- wherein the handedness, with respect to gravity, is a handedness with respect to a view from a position vertically above the hypothetical triangle and looking in the direction of gravity;
- wherein a hypothetical triangle is defined by a path that starts at the first device, moves to the second device, moves to the third device before reverting back to the first device, and
- wherein the handedness of the hypothetical triangle defines whether this path moves clockwise or counter-clockwise within a plane containing the triangle;
- wherein the computer-implemented method comprises:
- defining a direction of gravity with respect to a first device of the set of three devices from a gravitational sensor associated with the first device and comprised by the first device;
- obtaining, from an electromagnetic detector arrangement associated with the first device of the set of three devices:
- a first indicator that indicates the relative direction of a second device, of the set of three devices, with respect to the first device, wherein the second device is configured to output electromagnetic energy detectable by the electromagnetic detector arrangement;
- and
- a second indicator that indicates the relative direction of a third device with respect to the first device, wherein the third device is configured to output electromagnetic energy detectable by the electromagnetic detector arrangement;
- and
- determining the handedness of the hypothetical triangle with respect to gravity by processing the direction of gravity with respect to the first device, the first indicator and the second indicator.
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A processing system for determining the handedness, with respect to gravity, of a first hypothetical triangle connecting a set of three devices, the processing system being configured to:
- define a direction of gravity with respect to the first device from a gravitational sensor associated with the first device and comprised by the first device;
- obtain, from an electromagnetic detector arrangement associated with the first device of the set of three devices:
- a first indicator that indicates the relative direction of a second device, of the set of three devices, with respect to the first device, wherein the second device is configured to output electromagnetic energy detectable by the electromagnetic detector arrangement;
- and
- a second indicator that indicates the relative direction of a third device with respect to the first device, wherein the third device is configured to output electromagnetic energy detectable by the electromagnetic detector arrangement;
- and
- determine the handedness of the first hypothetical triangle connecting the three devices with respect to gravity by processing the direction of gravity with respect to the first device, the first indicator and the second indicator.
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Dependencies are inferred from the claim text.