MIT has recently announced that its engineers have developed a new way to make sharper, defect-free displays, with the invention of vertical, full-color microscopic LEDs.
LEDs are reaching a limit as to how small they can be while still performing effectively. This limit is especially noticeable in close-range displays such as augmented and virtual reality (AR/VR) devices, where limited pixel density results in a “screen door effect” such that users perceive stripes in the space between pixels.
To solve this issue of size, instead of placing red, green, and blue LEDs (light-emitting diodes) side by side in a horizontal patchwork, a team at MIT has invented a way to stack the diodes to create vertical, multicolored pixels.
According to MIT, each stacked pixel can generate the full commercial range of colors and measures about 4 microns wide (for context, a human hair ranges anywhere from 17-181 microns). The microscopic pixels, or “micro-LEDs,” can be packed to a density of 5,000 pixels per inch. ...
See the full story here: https://www.auganix.org/vr-news-mit-engineers-invent-vertical-full-color-microscopic-leds-for-use-in-ar-and-vr-devices/