| CPC F21V 23/007 (2013.01) [G07F 17/3211 (2013.01); G07F 17/3216 (2013.01); F21Y 2115/10 (2016.08)] | 15 Claims |

|
1. An illumination device comprising:
a first substrate;
a plurality of LED drivers arranged in a physical series along the first substrate and coupled to drive a plurality of respective LED pixels, each of the LED drivers including a data input and a data output for communicatively coupling the LED drivers;
communication traces formed along the first substrate and connecting to respective data inputs and data outputs of the LED drivers to electrically arrange the LED drivers into an upstream series comprising a first selected group of the LED drivers and a downstream series comprising the remaining LED drivers, the upstream series and downstream series being interspersed along the physical series;
a proximal upstream terminal pad on the first substrate for connecting an upstream data signal onto the first substrate;
a distal upstream terminal pad on the first substrate for connecting the upstream data signal off of the first substrate;
a proximal downstream terminal pad on the first substrate for connecting a downstream data signal off of the first substrate;
a distal downstream terminal pad on the first substrate for connecting the downstream data signal onto the first substrate; and
a loopback circuit operable to determine if the first substrate is a final substrate in a series of substrates, and if so to connect the data output of a final LED driver of the upstream series to the data input an initial LED driver of the downstream series.
|