update: it turns out that the report about the eLux acquisition was incorrect.
According to a report from Taiwan, Foxconn acquired US-based eLux - a company that was established in 2016 to develop a scalable assembly process for micro-LED devices. Foxconn was already an investor in eLux (through its Subsidiary CyberNet Venture Capital).
Foxconn also acquired a 7.32% stake in Taiwan-based LED developer and producer Epileds Technologies. This is reportedly just a first step as Foxconn aims to become Epiled's largest stakeholder in the near future. Digitimes reports that the motivation behind this takeover is mostly Epiled's micro-LED technologies.