Flat panel display having electron transport ducts with equal propagation paths from entrance to exit

摘要

A display device including a vacuum envelope having an electroluminescent screen, an electron source and a branched network of electron-transport ducts having at least one entrance for electrons and at least two exits at end portions of the network. An electron current flows from the entrance to a desired one of the exits via nodes in the network. The network exits corresponding to one entrance form a two or three dimensional array of exits. Preferably, the distance, via the network, between an entrance and its corresponding exits is equal.