Patent ID: 7956545

Claim:
A field emission device comprising a front substrate and a rear substrate which are disposed at a certain distance and opposite to each other; at least one or more pairs of first electrode and second electrode formed on said rear substrate; emitters formed on the upper surfaces of said first electrode and said second electrode; an anode electrode formed on said front substrate toward said rear substrate side; a fluorescent layer formed on said anode electrode; a first voltage application means for applying AC voltage to said anode electrode; and a second voltage application means for alternately applying an AC voltage to said first electrode and said second electrode, wherein the AC voltage applied to said anode electrode, and said first and second electrodes are synchronized and polarities of the voltages applied to said first and second electrodes are opposite to each other, and wherein the AC voltages being applied to said anode electrode, and said first electrode and said second electrode are square waves having the same frequency and duty ratio.