"A new reflective display could shatter those restrictions with resolutions beyond the limit of human perception. In a recent study in Nature, scientists describe a reflective retina e-paper that can display color video on screens smaller than two square millimeters across. The researchers used nanoparticles whose size and spacing affect how light is scattered, tuning them to create red, green and blue subpixels."
"Each pixel is only 560 nanometers wide, creating a resolution above 25,000 pixels per inchmore than 50 times that of current smartphones. We can make displays a similar size as your pupil, with a similar number of pixels as photoreceptors in your eyes, says study co-author Kunli Xiong of Uppsala University in Sweden. So we can create virtual worlds very close to reality."
A reflective retina e-paper displays full-color video on screens smaller than two square millimeters by using nanoparticle-based subpixels. Nanoparticle size and spacing determine scattering to produce red, green, and blue subpixels. An electrochromic material controls light absorption and reflection with electrical signals, enabling metapixels of three subpixels to generate any color. Individual pixels measure 560 nanometers across, yielding resolutions above 25,000 pixels per inch, far exceeding current smartphones. Reflective e-paper relies on ambient light, reduces energy use, and retains pixel states without continuous power, enabling pupil-sized displays with photoreceptor-level pixel counts.
Read at www.scientificamerican.com
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