As you can see, Panasonic supply some chips to LG.
Most important thing is to see is how far 4K TVs are from their cheap FullHD analogs (that are highly integrated, usually with just main LSI, Flash and RAM) and how big is cost reduction potential.
All images from http://www.realhd.co.kr/xe/general/23202
It looks like you're new here. If you want to get involved, click one of these buttons!