Patent ID: 9686011
Date: 2017-06-20
CPC Classifications: H04B,H05B,Y02B

Claim:
1. An illumination device for embedding one or more data symbols of a data signal into a luminance output of the illumination device, the device comprising: a light emitting diode comprising at least a first segment and a second segment, wherein the first segment and the second segment have a common electrode and are individually controllable and the light emitting diode is configured to generate the luminance output in response to a drive signal into which light settings are translated to control said luminance output in accordance with said light settings; and a controller configured for switching the second segment on or off in response to the data signal to form, in said luminance output, coded light embedded with the one or more data symbols of the data signal while the drive signal is constant and is supplied to said common electrode, wherein a modulation depth is proportional to the size of at least one of the first segment and the second segment.