I think all we depend of the used IC/CHIP in the strings.
In theory all can be done...
Just request to develop something compliant using the same chips as in the strings.
Now as the used chip is confident for moment, difficult to answer...
Some we do not have yet the information of the embedded chip, but for some reason seems to be a temporally secret.
What i know, if i'm not wrong : 3 wires between pixels...
So that's limit a little the research....