Surface-conduction electron-emitter display is a type of flat-panel display technology that operates similarly to a traditional cathode ray tube but on a microscopic scale. It uses nanoscopic electron emitters for each individual pixel to excite phosphors on a screen. This technology was developed to combine the deep blacks and high contrast ratios of CRTs with the slim profile of flat panels, though it was largely superseded by OLED and advanced LCDs.
Heard on the job
The prototype SED monitors had incredible black levels and color accuracy, but they never made it to mass production.