Methods and apparatus for determining relative positions of LED lighting units

摘要

Methods and apparatus for determining the relative electrical positions of lighting units (202a, 202b, 202c, 202d) arranged in a linear configuration along a communication bus (204) are provided. The methods may involve addressing each lighting unit (202a, 202b, 202c, 202d) of the linear configuration once, and counting a number of detected events at the position of each lighting unit. The number of detected events may be unique to each electrical position, thus providing an indication of the relative position of a lighting unit within the linear configuration. The methods may be implemented at least in part by a controller (210) common to multiple lighting units of a lighting system, or may be implemented substantially by the lighting units (202a, 202b, 202c, 202d) themselves.

主权项

1. A method, comprising:
A) addressing each addressable LED-based lighting unit of a plurality of addressable LED-based lighting units arranged in a linear configuration on a communication bus comprising a data line, a power line and a ground line; and B) counting, for each addressable LED-based lighting unit, a number of times a change in an electrical property at least partially dependent on current occurs on the data line or the power line or the ground line in response to A).