Field emission displays (FEDs) are a type of flat-panel display technology that uses electron emission to create images. They consist of a matrix of tiny cathodes that emit electrons when an electric field is applied. These electrons then strike a phosphor coating, producing light and forming the display's images. FEDs are known for their high brightness, fast response times, and wide viewing angles. They are considered a potential alternative to other display technologies like LCDs and OLEDs, offering advantages in terms of power efficiency and color accuracy. However, they have not yet achieved widespread commercial use.