Reflective micro color display with a record-high resolution of 25,000 pixels per inch operates at 25 frames per second

https://techxplore.com/news/2025-10-minimal-pixels-highest-resolution-visible.html

"highest possible resolution visible to human eye: each pixel roughly corresponds to 1 photoreceptor in eye... sub-wavelength structures act as meta-materials in highly miniaturized spectrometer... few square mm size is orders of magnitude smaller, fits on phone... measures UV to near-IR with sensitivity comparable to big devices... rapidly applying range of <1 volt voltages, measures light captured at each voltage, then computational program accurately recreates light's signature in <1 ms... hand-held spectroscopy devices"

Related: Bridging light, microwaves and electrons for precision calibration
https://phys.org/news/2025-10-bridging-microwaves-electrons-precision-calibration.html