Patent ID: 7583015

Claim:
An electron-emitting apparatus comprising: an electron-emitting device including a first conductive film and a second conductive film, arranged at an interval, on a surface of a substrate; and an anode electrode located at a distance H [m] from the surface of the substrate, wherein a voltage Va [V] is applied between the anode electrode and the first conductive film so that a potential of the anode electrode is higher than a potential of the first conductive film, and a drive voltage Vf [V] is applied between the first conductive film and the second conductive film so that a potential of the second conductive film is higher than the potential of the first conductive film, to emit electrons from the first conductive film, wherein a thickness of a first portion of the second conductive film, which is located at a shortest distance d from a portion of the first conductive film in from which electrons are emitted as a result of the drive voltage Vf [V], is equal to or smaller than a thickness of the portion of the first conductive film from which the electrons are emitted, wherein the shortest distance d is smaller than (Vf×H)/(π×Va), wherein the second conductive film further has a second portion and a third portion, between which the first portion is arranged, wherein the second portion and the third portion of the second conductive film are thicker than the first portion, and wherein a thickness of an end portion of the first conductive film facing the first portion is smaller than each thicknesses of the second portion and the third portion.