Patent ID: 8699887
Filing Date: 2014-04-15
Classification: H04B

Abstract:
1. For use by a light fixture including a light source that emits visible light in response to a drive signal, a method for broadcasting light fixture information using visible light generated by the light source of the light fixture in a manner that avoids visually perceptible flicker, the method comprising: (a) producing a data encoded drive signal that includes the light fixture information encoded therein; and (b) driving the light source of the light fixture with the data encoded drive signal to thereby cause the light source to emit data encoded visible light having the light fixture information encoded therein; wherein the data encoded visible light comprises exactly N data symbol(s) encoded into each of a plurality of consecutive time intervals of the data encoded visible light, which contributes to visually perceptible flicker being avoided, where N is an integer that is equal to or greater than 1; and wherein the light fixture information is encoded into the data encoded visible light such that a difference between different levels of each said data symbol of the data encoded visible light is indicative of an illumination capability of the light fixture and such that the different levels of the data encoded visible light do not result in visually perceptible flicker.