A Silicon Valley-based startup has recently emerged from stealth mode to reveal what it claims is the smallest, most pixel-dense dynamic display ever built. Mojo Vision’s display is just 0.48 millimeters across, but it has about 300 times as many pixels per square inch as a typical smartphone display. The display used microLED technology instead of OLEDs (as in several generations of Samsung devices and the iPhone X) or an LCD (as in every other iPhone). Made from gallium nitride, microLED displays can consume as little as 10 percent of the power of LCDs and are 5 to 10 times as bright as OLEDs. That combination makes them a good fit for head-up displays and other augmented reality applications.