I mean, that's more or less the conventional process for mass assembling PCBs. We use CNC machines that place down each component before the boards roll down th

I mean, that's more or less the conventional process for mass assembling PCBs. We use CNC machines that place down each component before the boards roll down the line to batch soldering. It would be wildly inefficient for large TV panels, and you probably couldn't get enough precision at a reasonable price. It would make much, much more sense to produce them the way we do LCD panels. The entire panel is manufactured at once with a lithographic process. Ideally, you'd grow the LEDs directly on the substrate. Then again, the process you suggest is almost what they lay out in the article. The LEDs and circuit elements are raster printed. It's still very inefficient as it takes a long time to raster over an entire panel