Patent ID: 7417380

Claim:
An electron emission device comprising: a first substrate; a second substrate facing the first substrate; cathode electrodes formed on the first substrate; electron emission regions formed on the cathode electrodes; an insulating layer and gate electrodes formed on the cathode electrodes and having openings exposing the electron emission regions; phosphor layers formed on the second substrate; and an anode electrode formed on a surface of the phosphor layers, wherein the distance z between the cathode and the anode electrodes satisfies the following condition: 0.7 d (( Va−Vc ) /Vg )≦ z≦ 1.4 d (( Va−Vc )/ Vg ), where Vc indicates the voltage applied to the cathode electrodes, Vg is the voltage applied to the gate electrodes, Va is the voltage applied to the anode electrode, and d is the distance between the cathode and the gate electrodes, and wherein Vc, Vg, and Va are expressed by the unit of volts (V), and d and z by the unit of micrometers (μm).