OLED microdisplay maker eMagin reported its financial results for Q4 2017, and during the quarter's conference call its CEO, Andrew Sculley, discussed Micro-LED for microdisplays.
VueReal Micro-LED microdisplay prototype
eMagin actually did a research in this area with a University and has some patents towards micro-LED based microdisplays. However according to Andrew this technology still faces some challenges and it may take several years before Micro-LEDs could be applied to microdisplays - unlike TVs or larger displays which are already on the market.
Earlier this month Micro-LED microdisplay developer VueReal announced the initial closing of its $10.5 million Series A funding round. VueReal says that its proprietary micro-LED technology and process enables high-performance super low-power displays, coupled with a significant cost reduction.
Disclosure: the author of this post holds some shares in eMagin